JP3602124B1 - Cable protection and fixing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable protection of a cable penetrating a deflecting part in a bridge, and to easily and efficiently realize good fixing performance of this cable.
A step of removing a coating material (52) of at least a portion (30) of a deflection tube path corresponding to an abdominal pressure action section in the deflection tube (2) in a cable (3) inserted through a deflection tube (2) in a deflection unit (1). Inserting the cable 3 from which the coating material 52 has been removed through the deflection tube 2, filling the deflection tube 2 with epoxy resin 7, and at least a portion 30 of the cable 3 from which the coating material 52 has been removed. Is coated with an epoxy resin 7.
[Selection diagram] FIG.

Description

  The present invention relates to a method for protecting a cable that passes through a deflection unit such as a saddle structure in a bridge, a cable protection structure, a structure provided with the cable protection structure, and a cable fixing device.

  As a method for protecting the cable, for example, a sheath that encloses a PC cable and is filled with grout and has a plurality of circumferential recesses on the inner circumferential surface at intervals in the tube axis direction There has been proposed a protective sheath for a PC cable (see Patent Literature 1), which is characterized by forming a communication portion that connects these recesses.

In addition, various cable fixing devices have been devised so as not to slide when a diagonal member such as a cable-stayed bridge penetrates the saddle portion. For example, it has a double pipe structure of an outer pipe penetrating and buried in a support column of a cable-stayed bridge, and an inner pipe loosely inserted into the outer pipe, and a cable is inserted into the inner pipe to be injected and filled. A deflecting unit fixed by a material, wherein an inner surface of at least a two-part body has a tapered shape, and a spacer inserted between both ends in the inner tube to seal a pipe opening around a cable; An anchor member embedded in the support column outside both ends of the tube, and a holding block supported and fixed to the anchor member and pressed against the end of the outer tube and the spacer from outside. There has been proposed a cable-stayed bridge cable deflector (see Patent Document 2).
JP-A-2002-81170 JP-A-11-280021

  However, regarding a cable in which a diagonal member such as an outer cable or a cable-stayed bridge of a box girder bridge penetrates a deflecting portion such as a saddle portion, no method has been proposed for protecting the deflecting portion from damage due to such abdominal pressure. .

  Further, with respect to the cable fixing device, in various conventional methods, it was necessary to use various components such as a flange, a spacer, a holding metal, and an anchor bolt to be welded to the outer tube, for the cable fixing device.

  Therefore, the number of parts used increases, and it has been difficult to appropriately reduce the number of steps and costs. In addition, by using many components in combination, the structure of the fixing device (including the structure for attaching to the deflecting unit) tends to be complicated, and the working efficiency has not been improved. Therefore, for example, when the tension difference between the cables on both sides of the deflecting portion is smaller than the cable tension, it is difficult to say that this is an economical method.

  On the other hand, when cement grout or the like is used as a filler for filling a socket, such as when a galvanized PC steel strand is used for a cable, the zinc contained in the cable reacts with cement grout to generate hydrogen gas. There was also. In this case, the plating film of the cable may be reduced or hydrogen embrittlement may be involved.

  Further, in order to develop a good adhesive force between the cement grout and the cable, it is necessary to take an appropriate adhesive length.For example, when the difference between the cable tensions is large, the inside of the socket is tapered. For example, the cable fixing method itself is complicated and time-consuming, for example, the size of the fixing device itself is increased.

  Therefore, an object of the present invention is to provide a cable protection method, a cable protection structure, and a cable protection method that enable protection of a cable penetrating a deflecting portion of a bridge and that can easily and efficiently exhibit good fixing performance for the cable. An object of the present invention is to provide a structure having a cable protection structure and a cable fixing device.

A cable protection method according to the present invention for solving the above-mentioned problems is a method for protecting a cable passing through a deflection portion of a saddle structure in a bridge, wherein the cable is filled with a bundle of a plurality of galvanized PC steel wires. A prefabricated cable formed into a substantially circular cross section with a material and covering the outer periphery of the formed bundle with high-density polyethylene, and integrally formed. At least in the deflection tube, the step of removing the covering material of the portion corresponding to the abdominal pressure action section, which is the pressure contact section between the cable and the deflection tube, and the step of inserting the cable from which the coating material has been removed through the deflection tube; Filling the deflection tube with epoxy resin, and covering at least a portion of the cable from which the coating material has been removed with epoxy resin. And that step, characterized in that it comprises a (first invention).

A second invention is a method for protecting a cable passing through a deflecting portion of a saddle structure in a bridge, wherein the cable is at least higher than the abdominal pressure acting section, which is a pressure contact section between the cable and the deflecting tube in the deflecting section. At least a portion outside the deflecting portion is subjected to a water stoppage treatment, and the abdominal pressure action in at least the deflecting tube in the deflecting tube path in the deflecting tube path of the cable passing through the deflecting tube in the deflecting portion. Removing the covering material of the section corresponding to the section, inserting the cable from which the covering material has been removed through the deflection tube, filling the deflection tube with an epoxy resin, at least the covering material of the cable Covering the removed portion with an epoxy resin .

A third invention is a method for protecting a cable passing through a deflection portion having a saddle structure in a bridge, wherein the cable passing through the deflection tube in the deflection portion has at least a cable in the deflection tube in the deflection tube path. Removing the covering material at a portion corresponding to the abdominal pressure action section, which is a pressure contact section between the tube and the deflection tube; inserting the cable from which the covering material has been removed through the deflection tube; and filling the deflection tube with an epoxy resin. Coating at least a portion of the cable from which the coating material has been removed with epoxy resin; and, of the cables protruding from the surface of the deflection unit through the deflection tube in the deflection unit, a predetermined length from the surface of the deflection unit. Removing the covering material of the part, and the part having a predetermined airtightness having an inner space capable of enclosing a part of a predetermined length from which the covering material has been removed. Using a socket that encloses, the step of enclosing the predetermined length portion and filling the interior of the socket with epoxy resin, and a predetermined length that is located between the socket and the surface of the deflecting portion and from which the coating material is removed. Fixing a plate, which transmits the tension of the cable to the deflection section via an adhesive force between a portion and the epoxy resin, to the socket and the deflection section .

In a fourth aspect based on the third aspect , the socket has a structure in which opposing inner surfaces are substantially parallel in a side cross section, and a structure capable of being divided or opened in a cable length direction; It has a resin inlet and a resin outlet .

In a fifth aspect based on the third or fourth aspect, the deflection tube and the plate are integrally provided in the socket, and the socket is fixed to the deflection portion .

A sixth invention is a method for protecting a cable passing through a deflection portion of a saddle structure in a bridge, wherein the cable passing through the inner tube of the deflection tube in the deflection portion includes an inner pipe route of the deflection tube. At least in the inner pipe, a step of removing a covering material at a portion corresponding to a belly pressure action section which is a pressure contact section between the cable and the inner pipe, and a step of inserting the cable from which the covering material has been removed through the inner pipe; Prior to filling the inner tube of the deflection tube with epoxy resin, a step of stopping water between an end opening of the inner tube and the outer periphery of the cable, and deflecting the inner tube relative to the position of the water stopping process. The filling port provided on the inner side is filled with epoxy resin to fill the inner tube with epoxy resin, and at least a portion of the cable from which the coating material has been removed is covered with epoxy resin. Characterized in that it comprises the steps of, a.

According to a seventh aspect, in the sixth aspect, in the inner pipe, the inlet is located at a position opposite to the inlet with the deflecting portion interposed therebetween, and the outlet provided on the inner side of the deflecting portion with respect to the position of the water stopping process. The filling of the epoxy resin is terminated when the filled epoxy resin is discharged from the injection port .

According to an eighth invention , in any one of the first to seventh inventions, the bridge is a truss bridge .

A ninth aspect of the present invention is a structure for protecting a cable inserted in a deflection portion of a saddle structure in a bridge, wherein the cable has a substantially circular cross-section formed by bundling a plurality of galvanized PC steel wires with a filler. It is a prefabricated cable which is molded and integrally formed by coating the outer periphery of the formed bundle with high-density polyethylene, and is a press-contact section between the cable and the deflection tube in at least the deflection tube in the deflection tube in the deflection section. A cable from which a covering material corresponding to an abdominal pressure action section has been removed is inserted into the deflection tube, and the deflection tube is filled with epoxy resin. At least a portion of the cable from which the coating material has been removed is covered with epoxy resin. It is characterized by becoming.

A tenth invention is a structure for protecting a cable inserted into a deflecting portion of a saddle structure in a bridge, wherein the cable is at least separated from the abdominal pressure acting section, which is a pressure contact section between the cable and a deflecting tube in the deflecting section. The cable outside the deflecting section is also a cable in which at least the inside thereof is subjected to a water stopping process, and the covering material of at least a portion corresponding to the abdominal pressure action section in the deflecting pipe in the deflecting pipe in the deflecting section is removed. Is inserted into the deflection tube, the deflection tube is filled with epoxy resin, and at least a portion of the cable from which the coating material is removed is covered with epoxy resin .

An eleventh invention is a structure for protecting a cable inserted into a deflecting portion of a saddle structure in a bridge, wherein at least in the deflecting tube in the deflecting portion, abdominal pressure as a pressure contact section between the cable and the deflecting tube in the deflecting tube The cable from which the covering material of the portion corresponding to the working section has been removed is inserted into the deflection tube, and the deflection tube is filled with epoxy resin.At least the portion of the cable from which the coating material has been removed is covered with epoxy resin. In the cable protruding from the surface of the deflecting portion through the inside of the deflecting tube in the deflecting portion, a portion of the cable from which a predetermined length of the covering material has been removed from the surface of the deflecting portion has an inner space capable of enclosing the portion and has a predetermined sealing. The interior of the socket is filled with an epoxy resin, and the space between the socket and the deflecting unit is interposed. Thus, a plate that transmits the tension of the cable to the deflecting unit via an adhesive force between the predetermined length portion where the coating material is removed and the epoxy resin is fixed to the socket and the deflecting unit. It is characterized by becoming .

A twelfth invention is a structure that protects the cable for inserting the deflecting portion of the saddle structure in the bridge, at least in the inner tube of the inner tube path of the deflected tube in the deflection unit, the cable and the inner tube the press contact sections serving abdomen to remove the portion covering material falls for interval pressure acting cable, inserted through inside the inner tube of the deflection tube, prior to performing the filling of epoxy resin into the inner tube of the deflection tube, the end of the inner tube Between the opening of the cable and the outer periphery of the cable, and filling the inner pipe with an epoxy resin for an injection port provided on the inner side of the deflection section from the position of the water stop processing in the inner pipe, and into the inner pipe. An epoxy resin is filled, and at least a portion of the cable from which the coating material is removed is covered with an epoxy resin .

A thirteenth invention is a structure provided with a structure for protecting a cable inserted into a deflecting portion of a saddle structure in a bridge, wherein the cable comprises a filler bundled with a plurality of galvanized PC steel wires. Is a prefabricated cable integrally molded by covering the outer periphery of the formed bundle with high-density polyethylene, and the cable and the deflection tube at least in the deflection tube among the deflection tubes in the deflection section. A cable from which a covering material corresponding to an abdominal pressure action section, which is a pressure contact section, is inserted through the deflection tube, and the deflection tube is filled with epoxy resin, and at least a portion of the cable from which the coating material has been removed. Is covered with an epoxy resin.

A fourteenth invention is a structure provided with a structure for protecting a cable inserted into a deflecting portion of a saddle structure in a bridge, wherein the cable is at least a pressure contact section between the cable and a deflecting tube in the deflecting portion. At least a portion outside the deflection section with respect to the abdominal pressure action section is subjected to a water stoppage process therein, and at least a portion of the deflection tube in the deflection section corresponding to the abdominal pressure action section in the deflection pipe is covered. The cable from which the material has been removed is inserted into the deflection tube, the deflection tube is filled with epoxy resin, and at least a portion of the cable from which the coating material has been removed is covered with an epoxy resin. A structure characterized in that:

A fifteenth invention is a structure provided with a structure for protecting a cable inserted into a deflecting portion having a saddle structure in a bridge, wherein at least the deflecting tube in the deflecting portion has a cable and a deflecting tube. A cable from which a covering material corresponding to an abdominal pressure action section as a pressure contact section is removed is inserted into the deflection tube, an epoxy resin is filled in the deflection tube, and at least a portion of the cable from which the coating material is removed is epoxy. A portion of the cable covered with resin and inserted through the deflection tube in the deflection portion and protruding from the surface of the deflection portion, a portion where a predetermined length of the covering material is removed from the surface of the deflection portion is removed from the inside space capable of including the portion. Having a predetermined hermeticity and enclosing it using a socket that encloses the part, filling the interior of the socket with epoxy resin, A plate, which transmits tension of the cable to the deflecting unit through an adhesive force between a predetermined length portion where the coating material is removed and the epoxy resin, between the socket and the deflecting unit. A structure comprising a cable protection structure fixed to the body .

A sixteenth invention is a structure having a structure that protects the cable for inserting the deflecting portion of the saddle structure in bridges, within at least the inner tube of the inner tube path of the deflected tube in the deflection unit, the cable the press contact sections serving abdomen to remove pressure acting section sites corresponding to dressing cable with bets inner tube, inserted through inside the inner tube of the deflection tube, prior to performing the filling of epoxy resin into the inner tube of the deflection tube, Water-stopping treatment is performed between the end opening of the inner pipe and the outer periphery of the cable, and an epoxy resin is filled into an injection port provided on the inner side of the deflection unit with respect to the position of the water-stopping treatment in the inner pipe. And a cable protection structure in which the inner tube is filled with epoxy resin, and at least a portion of the cable from which the coating material is removed is covered with epoxy resin .

A seventeenth aspect of the present invention is a cable fixing device for inserting a deflecting portion of a saddle structure in a bridge, wherein the deflecting device removes a coating material from a cable inserted in a deflecting tube of the deflecting portion and protruding from a surface of the deflecting portion. A portion having a predetermined length from the surface of the portion, a socket having an inner space capable of enclosing and enclosing the portion with a predetermined hermeticity, and an epoxy resin is filled in the socket inner space enclosing the predetermined length portion. The tension of the cable is transmitted to the deflection unit via an adhesive force between the filling portion, the socket, and the surface of the deflection portion, the predetermined length from which the coating material is removed, and the epoxy resin. And a plate to be provided.

  In addition, the problems disclosed by the present application and the solution thereof will be clarified by the description of the embodiments of the invention and the drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the protection of the cable which penetrates the deflection | deviation part in a bridge is attained, and the favorable fixing performance about this cable can be expressed easily and efficiently.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing a schematic structure of an example of a bridge to which the present embodiment is applicable. (A) Cable-stayed / extra-dosed bridge, (b) truss bridge, (c) box girder bridge, (d) girder bridge It is each side view of. The cable protection method according to the present embodiment can be applied regardless of the type of bridge, but the cable fixing device is applied to a truss bridge in which the difference in cable tension between the left and right of the deflecting unit is within several% (eg, 4%). Can be assumed. However, the scope of the present invention is not limited to such embodiments. For example, cable-stayed bridges or extra-dosed bridges, or box girder bridges, various other bridges such as girder bridges, Any bridge can be applied as long as the length of adhesion between the cable and the epoxy resin in the space inside the socket of the fixing device is adjusted to correspond to the difference in cable tension between the left and right deflection parts in each bridge.

  Next, a procedure for applying the present invention to such a bridge will be described. FIG. 2 is a diagram showing procedures (a) to (c) in cable protection method example 1 of the present embodiment. For example, the top of the middle support column (tower) of a cable-stayed bridge or an extra-dosed bridge, or the upper part of the capital of a truss bridge or a box girder bridge on the middle fulcrum is defined as a deflection unit 1. The deflection tube 2 provided is installed (FIG. 2A). Further, it is assumed that an inner tube 20 penetrates into the inner space of the deflection tube 2 (FIG. 2B). The inner tube 20 is provided with an inlet 21 and an outlet 22 for filling with an epoxy resin. The discharge port 22 allows the existing substance (air and the like) in the inner tube 20 and the cable to be discharged with the filling of the epoxy resin, and also indicates the completion of the filling by the overflow of the epoxy resin from the discharge port 22. Carry.

  The inlet 21 is provided in the inner pipe 20 of the cable 3 on the inner side of the deflecting unit 1 with respect to a position of a water stopping process described later. Further, the discharge port 22 is provided in the inner pipe 20 at a position facing the injection port 21 with the deflecting unit 1 interposed therebetween, and is provided on the inner side of the deflecting unit 1 with respect to the position of the water stopping process.

Next, the cable 3 to be protected is inserted into such an inner tube 20 (FIG. 2C). The cable 3 is obtained by removing at least a covering material of a portion 30 corresponding to a belly pressure action section in the deflection tube 2 in the path in the deflection tube 2 in the deflection section 1. In the abdominal pressure action section, the tension acting on the cable 3 outward from the open end 23 of the deflection tube 2 acts on the inner tube 20 in the abdominal pressure direction. Will be pressed. That is, the abdominal pressure action means a pressure contact section between the cable 3 and the inner tube 20 .

  The cable 3 can be a prefabricated cable as shown in FIG. This prefabricated cable is formed by winding or filling a bundle 4 of a plurality of galvanized PC steel strands 50 with a filler 51 (or a molding material), and coating the outside with a high-density polyethylene 52 (HDPE). ) Is a cable that is covered and integrated so that the outer periphery of the cross section is circular.

Further, the cable 3 is a cable in which at least a portion outside the deflecting portion 1 with respect to the portion 30 corresponding to the abdominal pressure action section is subjected to a water stopping process. As an example of the water stopping process, a process of filling the gap between the strands 50 and the gap between the strand 50 and the covering material 52 with the water stopping material, for example, forming the bundle 4 inside the covering material 52 is assumed. it can. Thereby, when filling the inner tube 20 into which the cable 3 has been inserted with the epoxy resin, it is possible to prevent the epoxy resin from flowing out to the cable 3 other than the section where the water stopping process has been performed.

  FIG. 3 is a diagram illustrating procedures (d) to (f) in Example 1 of the cable protection method and the fixing method according to the present embodiment. After the cable 3 has been inserted through the inner tube 20, the gap between the end opening 24 of the inner tube 20 and the outer periphery 31 of the cable is set prior to filling the inner tube 20 of the deflection tube 2 with epoxy resin. Water treatment. This water stopping process is performed by, for example, fixing the space between the end opening 24 of the inner pipe 20 and the outer periphery 31 of the cable in a watertight manner with a heat-shrinkable tube.

  After this fixing, the injection fitting 25 made of epoxy resin is attached to the inner tube 20 by associating with the injection port 21 and the discharge port 22 in the cable 3. The injection fitting 25 is provided with, for example, a pipe connected to the injection port 21 and the discharge port 22, and may be configured such that the pipe protrudes from the surface of the injection fitting 25. Therefore, the filling of the epoxy resin 7 is performed from this tube (FIG. 3D). By filling the epoxy resin 7, for example, the abdominal pressure action section of the inner tube 20 is filled with the epoxy resin 7, and at least a portion of the cable 3 from which the coating material 52 is removed is covered with the epoxy resin 7. Become.

  The cable 3 thus protected is then subjected to appropriate fixing measures. For this reason, of the cable 3 that passes through the inner tube 20 in the deflection tube 1 of the deflection unit 1 and protrudes from the surface of the deflection unit, a portion L having a predetermined length from the surface of the deflection unit (for example, a predetermined length L outward from the cable outer periphery 31). Long) coating material 52 is removed. This removal processing may be performed in advance at a factory or the like, or may be performed at a cable construction site.

  Next, using the socket 6 having an inner space capable of enclosing the portion L of a predetermined length from which the covering material 52 has been removed and enclosing the portion L with a predetermined hermeticity, the portion L having the predetermined length is used. And the interior of the socket 6 is filled with an epoxy resin 7 (FIG. 3 (e)).

  Further, the cable 3 is connected to the deflection unit 1 via the adhesive force between the epoxy resin 7 and the predetermined length L between the socket 6 and the surface of the deflection unit and from which the coating material 52 is removed. The taper plate 5 (plate) for transmitting the tension is fixed to the socket 6 and the deflection unit 1 (FIG. 3 (f)). For fixing the taper plate 5 (see FIG. 4A) and the deflecting unit 1, for example, bolt fixing can be adopted. Similarly, the taper plate 5 can be fixed to the socket 6 by, for example, inserting a bolt 70 into a flange portion of the taper plate 5 and fastening with a nut 71 (see FIG. 4B). .

  The fixing structure of the formed cable 3 is as shown in FIG. The socket 6 has a structure in which the inner surfaces 63 facing each other in the side cross section are substantially parallel, and is divided in the cable length direction (for example, a structure including two divided pieces 64 provided with fasteners 65 each other). ) Or a structure capable of opening (eg, a half-split structure in which hinges are arranged in a flexible portion), and an inlet 61 and an outlet 62 for the epoxy resin 7. The inlet 61 is provided, for example, on the lower side of the socket 6 and farther from the deflecting unit 1, and the outlet 62 is provided on the upper side of the socket 6, closer to the deflecting unit 1.

  The filling of the inside of the socket 6 with the epoxy resin 7 is performed from the injection port 61, and the filling is completed after confirming that the epoxy resin 7 is discharged from the discharge port 62. Further, it is preferable that hot air is blown in order to increase the temperature of the socket 6 in order to accelerate the curing of the epoxy resin 7.

  With such a structure, the uneven tension of the cable 3 caused by the difference in the tension of the cable 3 between the right and left of the deflection unit 1 is first transmitted to the socket 6 through the adhesion of the epoxy resin 7. This force is transmitted by the tapered plate 5 to the surface of the deflection unit 1 as a bearing. The taper plate 5 is capable of adjusting the angle between the end face of the socket 6 and the surface of the deflecting portion 1 and has a steel plate material having a hole near the center of the end face where the cable 3 is loosely inserted. (See FIG. 4A).

  It is assumed that the cable 3 is inserted through the inner pipe 20 of the deflecting unit 1 and is tensioned and fixed by double pulling using a jack or the like with an appropriate fixing tool installed on a girder member of a bridge, for example. For the portion L having a predetermined length in the inner space of the socket 6, the covering material 52 is peeled off in advance at a cable factory or the like, or the cable 3 is tensioned at the site and the position is determined after the cable 3 has been extended. Can be peeled off.

  In addition, the covering material 52 of the cable 3 is set in a state of entering from the both ends of the socket 6 by a slight length. In order to prevent the filled epoxy resin 7 from leaking from the gap between the covering material 52 and the socket 6, for example, when the socket 6 divided into two is installed so that one end surface thereof is in contact with the tapered plate 5, the The diameter of the hole is made slightly smaller than the outer shape of the coating 52 of the cable 3 so that the outlet holes at both ends strongly press the coating 52.

Further, a flange 66 is attached to the outside of the socket 6 when divided into two parts along the division surface, and a rubber packing is attached to the inner surface of the flange 66 in advance. That is, if the flanges 66 are brought into contact with each other and fastened by the bolts 65, the rubber packing is pressed and the water stoppage is secured.

  Further, in order to prevent the epoxy resin 7 to be filled from leaking, a rubber having an O-ring shape and an inner diameter smaller than that of the coating material 52 is appropriately formed so as to cover the inside of both ends of the socket 6 before the socket 6 is installed. It is preferable to attach a grout stopper 10. In addition, when a silicone-based waterproofing agent 9 is applied to the diplomatic line between the inner pipe 20 and the tapered plate 5 and the diplomatic line between the socket 6 and the coating material 52 of the cable 3, the water-stopping property is further improved.

  Alternatively, the deflection tube 2 and the taper plate 5 may be provided integrally with the socket 6, and the socket 6 may be installed, that is, the taper plate 5 may be fixed to the deflection unit 1. The means for integrating the deflection tube 2, the tapered plate 5, and the socket 6 in this manner will be described later.

  Furthermore, a flared-diameter enlarged portion 28 is provided at both ends of the deflection tube 2 so that the inner tube 20 and the cable 3 inserted therethrough do not come into contact with and be caught by the high-density polyethylene (HDPE) coating. Further, the extension of the enlarged diameter portion is stopped short of the surface of the deflecting portion 1 so that the formwork for forming the concrete wall surface of the deflecting portion 1 can be vertically assembled so as to be most easily installed. Therefore, the outlet 29 on the surface of the deflecting unit is formed by using, for example, a hemispherical former made of rubber that can be diverted.

  Next, another embodiment will be described. FIG. 8 is a diagram showing procedures (a) and (b) in Example 2 of the cable protection method and fixing method of the present embodiment, and FIG. 9 is a procedure (Example 2) of the cable protection method and fixing method of this embodiment. 10 is a diagram showing c) and (d), and FIG. 10 is a diagram showing procedures (e) and (f) in the cable protection method example 2 of the present embodiment. The inner tube 20 is inserted through the deflection tube 2 of the deflection unit 1 (FIG. 8A). Further, the tapered plate 5 is inserted through the inner tube 20, and the tapered plate 5 is fixed to the surface of the deflecting unit 1 (the fixing method is the same as in the above embodiment). A cap fixing ring 81 (see FIG. 5B) is attached to the end of the inner tube 20 (FIG. 8B).

  The tapered plate 5 is provided with an insertion hole 82 that connects the outside of the tapered plate 5 and the inside of the inner tube 20. Therefore, when the taper plate 5 is fixed to the surface of the deflecting unit 1, the exhaust hose 80 is passed through the insertion hole 82. The exhaust hose 80 allows the existing substance (air and the like) in the inner tube 20 and the cable to be discharged with the filling of the epoxy resin 7, similarly to the discharge port 22 in the above-described embodiment, and the epoxy from the discharge hose 80. The overflow of the resin 7 can play the role of indicating the completion of the filling. The outlet of the exhaust hose 80 outside the tapered plate 5 is disposed vertically above the other end of the exhaust hose 80 near the curvature point of the inner pipe 20 so that the exhaust hose 80 such as air can be used. Stagnation of circulating materials in the premises.

Subsequently, when the cable 3 is inserted into the inner tube 20, the cap 83 is passed first (FIG. 9C). Further, the cable 3 is obtained by removing at least the covering material 52 of the portion 30 corresponding to the abdominal pressure action section in the deflection tube 2 in the path in the deflection tube 2 in the deflection unit 1 as in the above-described embodiment. ing. In the abdominal pressure action section, the outward tension acting on the cable 3 from the open end 23 acts in the abdominal pressure direction on the inner tube 20, and the cable 3 and the inner tube 20 are pressed against each other. It will be. That is, the abdominal pressure action section means a pressure contact section between the cable 3 and the inner tube 20 .

In addition, as described above with reference to FIG. 6, the cable 3 can be a prefabricated cable. Then, it is assumed that at least a portion outside the deflection portion 1 with respect to the portion 30 corresponding to the abdominal pressure action section has been subjected to a water stoppage treatment. As an example of the water stopping process, for example, a process of forming the bundled wire 4 inside the covering material 52 and filling the gap between the strands 50 with the water stopping material can be assumed. Accordingly, when the inner tube 20 into which the cable 3 is inserted is filled with the epoxy resin 7, the epoxy resin 7 is prevented from flowing out to the cable 3 other than the section where the water stop processing has been performed.

After the cable 3 is inserted through the inner tube 20, a hose nipple 84 for injecting epoxy resin is attached to the inner tube 20. The hose nipple 84 has the same function as the above-described injection fitting 25 for the epoxy resin 7. Therefore, for example, a pipe connected to the inlet 21 and the outlet 22 is provided, and a pipe that projects from the surface of the hose nipple 84 can be assumed. Therefore, the filling of the epoxy resin 7 is performed from this tube.

  After attaching the hose nipple 84, the spacer 85 (see FIG. 5C) is pushed in and fixed until it comes into contact with the hose nipple 84, and the cap 83 is fixed to the cap fixing ring 81 (FIG. 9D )). As a fixing method, a method in which bolts are inserted into each other and fastened with bolts can be adopted.

Subsequently, the space between the cap 83 and the cable 3 is sealed with a suitable resin material, and further, urethane foam 90 is injected between the spacer 85 and the cap 83 (FIG. 10E). The injection process is performed by inserting an injection pipe between the spacer 85 and the cap 83. In the present embodiment, the inner tube 20 is made of steel, and the outer ends of both ends are threaded. Then, the nut 71 is screwed onto the cut screw and fastened to form a cable fixing device.

  Further, an appropriate tube is connected to the hose nipple 84, and the epoxy resin 7 is injected from the tube. By filling the epoxy resin 7, for example, the abdominal pressure action section of the inner tube 20 is filled with the epoxy resin 7, and at least a portion of the cable 3 from which the coating material 52 is removed is covered with the epoxy resin 7. Become.

  The filling process of the epoxy resin 7 is completed when the existing substance (air and the like) in the inner tube 20 and the cable is discharged with the filling of the epoxy resin 7 and the epoxy resin 7 overflows from the exhaust hose 80 (FIG. 10). (F)).

  Further, apart from the above-described embodiment, a case where the deflection tube 2 in the deflection unit 1 is a single tube can be assumed. FIG. 11 is a diagram showing procedures (a) to (d) in Example 3 of the cable protection method and the fixing method according to the embodiment. In the present embodiment, the filling of the epoxy resin 7 into the single pipe corresponds to the portion 130 of the cable 3 inserted into the single pipe, which corresponds to the abdominal pressure action section in the deflection pipe 2 and from which the coating material 52 is removed. Then, at least the portion 130 of the cable 3 from which the covering material 52 has been removed is covered with the epoxy resin 7. The cable 3 from which the coating material 52 has been removed may be inserted into the deflection tube 2 not only in the abdominal pressure action section but also in the entire section of the deflection tube 2, and the deflection tube 2 may be filled with the epoxy resin 7.

  As an implementation procedure, first, for example, a deflection tube 2 having a predetermined curvature is installed in the deflection unit 1 of the girder bridge (FIG. 11A). In the present embodiment, the curvature is equal to or more than a curvature that generates a belly pressure exceeding the wear resistance of the coating material 52 and is equal to or less than a curvature that generates a belly pressure that does not exceed the wear resistance of the epoxy resin 7. . In other words, even if the deflection tube 2 has a large curvature for which the use of the conventional coating material is to be avoided, the deflection tube 2 having such a large curvature can be obtained by employing the present embodiment using the epoxy resin 7. Even 2 can be handled.

  Next, a cable 3 is inserted into the deflection tube 2 (FIG. 11B). The deflection tube 2 is provided with an inlet 121 and an outlet 122 for filling with an epoxy resin. The discharge port 122 allows the existing substance (air or the like) in the deflection tube 2 or the cable to be discharged with the filling of the epoxy resin, and has a role of indicating the completion of the filling by the overflow of the epoxy resin from the discharge port 122. Carry. Further, the inlet 121 is provided on the cable 3 on the inner side of the deflecting unit 1 with respect to a position of a water stopping process to be described later, and an opening end thereof is protruded from the surface of the deflecting unit 1. The outlet 122 is provided near the curvature point C in the deflection tube 2.

The cable 3 inserted into the deflection tube 1 is obtained by removing at least a covering material of a portion 130 corresponding to an abdominal pressure action section in the deflection tube 2 in the path in the deflection tube 2 in the deflection section 1. I have. In the abdominal pressure action section, the tension acting on the cable 3 outward from the open end 23 acts in the abdominal pressure direction on the deflection tube 2, and the cable 3 and the deflection tube 2 are pressed against each other. It will be. That is, the abdominal pressure action section means a pressure contact section between the cable 3 and the deflection tube 2 .

  The cable 3 can be a prefabricated cable as already shown in FIG. This prefabricated cable is formed by winding or filling a bundle 4 of a plurality of galvanized PC steel strands 50 with a filler 51 (or a molding material), and coating the outside with a high-density polyethylene 52 (HDPE). ) Is a cable that is covered and integrated so that the outer periphery of the cross section is circular.

  In addition, the cable 3 is a cable in which at least a portion outside the deflecting portion 1 with respect to the portion 130 corresponding to the abdominal pressure action section is subjected to a water stopping process. As an example of the water stopping process, a process of filling the gap between the strands 50 and the gap between the strand 50 and the covering material 52 with the water stopping material, for example, forming the bundle 4 inside the covering material 52 is assumed. it can. Thus, when the epoxy resin 7 is filled into the deflection tube 2 into which the cable 3 has been inserted, it is possible to prevent the epoxy resin from flowing out to the cable 3 other than the section where the water stop processing has been performed.

After the cable 3 is inserted through the deflection tube 2, before the filling of the deflection tube 2 with the epoxy resin 7, the inner surface 131 of the deflection tube 2 and a portion where the coating material 52 of the cable 3 is removed. A water stop process is performed between the end 132 and the outer periphery 133 (FIG. 11C). This water stopping process is performed, for example, by fixing the filling material 134 between the inner surface 131 and the cable outer periphery 31 in a watertight manner. Alternatively, the cable 3 is expanded at the part end 132 beyond the inner diameter of the deflection tube 2, and the cable 3 is inserted into the deflection tube 2 so that the cable 3 comes into contact with the inner surface of the deflection tube 2, that is, Water stoppage processing may be performed. In any case, the form of the water stopping process may be variously adopted according to the execution status or the like.

  After that, the epoxy resin 7 from the injection port 121 is filled, for example, the belly pressure action section of the deflection tube 2 is filled with the epoxy resin 7, and at least the portion 130 of the cable 3 from which the coating material 52 is removed. Is covered with the epoxy resin 7.

  The cable 3 thus protected is then subjected to appropriate fixing measures (FIG. 11D). FIG. 12 is a cross-sectional view illustrating a cable fixing structure according to a third example of the cable protecting method and the fixing method according to the present embodiment. In this case, of the cable 3 inserted through the deflection tube 1 in the deflection unit 1 and protruding from the surface of the deflection unit, covering a portion L having a predetermined length from the surface of the deflection unit (for example, a predetermined length outward from the cable outer periphery 31). The material 52 is removed. This removal processing may be performed in advance at a factory or the like, or may be performed at a cable construction site.

  Next, using the socket 6 having an inner space capable of enclosing the portion L of a predetermined length from which the covering material 52 has been removed and enclosing the portion L with a predetermined hermeticity, the portion L having the predetermined length is used. And the interior of the socket 6 is filled with an epoxy resin 7.

  Further, the cable 3 is connected to the deflection unit 1 via the adhesive force between the epoxy resin 7 and the predetermined length L between the socket 6 and the surface of the deflection unit and from which the coating material 52 is removed. A taper plate 5 (plate) for transmitting tension is fixed to the socket 6 and the deflection unit 1. For fixing the taper plate 5 (see FIG. 4A) and the deflecting unit 1, for example, bolt fixing can be adopted. Similarly, the taper plate 5 can be fixed to the socket 6 by, for example, inserting a bolt 70 through the taper plate 5 and fastening with a nut 71 (see FIG. 4B).

  In the fixing structure of the cable 3 formed as described above, the socket 6 has a shape in which opposing inner surfaces 63 are substantially parallel in a side cross section, and is divided in a cable length direction (for example, the fastener 65 is not used). One having a structure composed of two divided pieces 64 provided with each other or a structure capable of opening (for example, a half-split structure in which hinges are arranged on a flexible portion), and an inlet 61 and an outlet 62 of the epoxy resin 7. It is. The inlet 61 is provided, for example, on the lower side of the socket 6 and farther from the deflecting unit 1, and the outlet 62 is provided on the upper side of the socket 6, closer to the deflecting unit 1.

  The filling of the inside of the socket 6 with the epoxy resin 7 is performed from the injection port 61, and the filling is completed after confirming that the epoxy resin 7 is discharged from the discharge port 62. Further, it is preferable that hot air is blown in order to increase the temperature of the socket 6 in order to accelerate the curing of the epoxy resin 7.

  With such a structure, the uneven tension of the cable 3 caused by the difference in the tension of the cable 3 between the right and left of the deflection unit 1 is first transmitted to the socket 6 through the adhesion of the epoxy resin 7. This force is transmitted by the tapered plate 5 to the surface of the deflection unit 1 as a bearing. The taper plate 5 is capable of adjusting the angle between the end face of the socket 6 and the surface of the deflecting portion 1 and has a steel plate material having a hole near the center of the end face where the cable 3 is loosely inserted. (See FIG. 4A).

  It is assumed that the cable 3 is inserted through the inner pipe 20 of the deflecting unit 1 and is tensioned and fixed by double pulling using a jack or the like with an appropriate fixing tool installed on a girder member of a bridge, for example. For the portion L having a predetermined length in the inner space of the socket 6, the covering material 52 is peeled off in advance at a cable factory or the like, or the cable 3 is tensioned at the site and the position is determined after the cable 3 has been extended. Can be peeled off.

  In addition, the covering material 52 of the cable 3 is set in a state of entering from the both ends of the socket 6 by a slight length. In order to prevent the filled epoxy resin 7 from leaking from the gap between the covering material 52 and the socket 6, for example, when the socket 6 divided into two is installed so that one end surface thereof is in contact with the tapered plate 5, the The diameter of the hole is made slightly smaller than the outer shape of the coating 52 of the cable 3 so that the outlet holes at both ends strongly press the coating 52.

Further, a flange 66 is attached to the outside of the socket 6 when divided into two parts along the division surface, and a rubber packing is attached to the inner surface of the flange 66 in advance. That is, if the flanges 66 are brought into contact with each other and fastened by the bolts 65, the rubber packing is pressed and the water stoppage is secured.

  Further, in order to prevent the epoxy resin 7 to be filled from leaking, a rubber having an O-ring shape and an inner diameter smaller than that of the coating material 52 is appropriately formed so as to cover the inside of both ends of the socket 6 before the socket 6 is installed. It is preferable to attach a grout stopper 10. In addition, when a silicone-based waterproofing agent 9 is applied to the diplomatic line between the inner pipe 20 and the tapered plate 5 and the diplomatic line between the socket 6 and the coating material 52 of the cable 3, the water-stopping property is further improved.

  Alternatively, the deflection tube 2 and the taper plate 5 may be provided integrally with the socket 6, and the socket 6 may be installed, that is, the taper plate 5 may be fixed to the deflection unit 1. When the deflection tube 2, the taper plate 5, and the socket 6 are integrated as described above, for example, a bolt 100 and a nut 101 are used as shown in FIG. The flange 110 provided on the deflection tube 2 and the flange 105 at the socket end and the tapered plate 5 are inserted with the bolts 100 and fastened and fixed with the nuts 101. When the cable 3 is subjected to, for example, unequal tension in the right direction by such a fixing measure, the socket 6 is fixed to the deflection tube 2 by the bolts 100 and the nuts 101 due to the adhesion of the resin, and does not separate from the deflection section 1. Thereby, displacement movement of the cable 3 at the belly pressure portion is more preferably prevented, and the cable 3 is better protected from frictional damage.

  Furthermore, a flared-diameter enlarged portion 28 is provided at both ends of the deflection tube 2 so that the inner tube 20 and the cable 3 inserted therethrough do not come into contact with and be caught by the high-density polyethylene (HDPE) coating. Further, the extension of the enlarged diameter portion is stopped short of the surface of the deflecting portion 1 so that the formwork for forming the concrete wall surface of the deflecting portion 1 can be vertically assembled so as to be most easily installed. Therefore, the outlet 29 on the surface of the deflecting unit is formed by using, for example, a hemispherical former made of rubber that can be diverted.

  In addition, another embodiment different from the above can be further assumed. Even in the case where there is no difference between the right and left tensions in the deflection section of the girder bridge or the like shown in FIG. 1D, the tension itself may fluctuate due to live load or the like. In this case, frictional damage of the plating film of each PC stranded wire and corrosion due to the frictional damage caused by the above-mentioned fluctuation in tension have also occurred. Therefore, in order to eliminate such a concern, cable protection is performed as follows. FIG. 14 is a diagram illustrating a cable protection structure at the deflection unit in Example 4 of the cable protection method and the fixing method according to the present embodiment.

  For example, when the insertion length of the cable 3 in the deflecting unit 1 is shorter than that in the other embodiments described above, the epoxy resin 7 is filled and cured over the entire cable insertion area in the deflecting unit 1. In this process, first, the narrow tubes 90 for injecting and discharging the epoxy resin 7 are installed in the gap between both ends of the deflection unit 1 and the cable 3. Then, the putty-like water blocking material 200 is sealed in the gap and sealed. In this state, the epoxy resin 7 is injected from the thin tube 90. In this manner, the effect of adhesion and covering between the deflecting portion 1 and each stranded wire by the epoxy resin 7 is exhibited, whereby the fear of friction damage to plating of the cable 3 and corrosion due to the friction damage can be eliminated. At the time of the injection of the epoxy resin 7, an appropriate water stop treatment is applied to the inside of the covering material 52 in advance so that the epoxy resin 7 does not enter the inside of the cable corresponding to the left and right of the removal section L of the covering material 52 of the cable 3. Shall be kept.

  ADVANTAGE OF THE INVENTION According to this invention, protection of the cable which penetrates the deflection part in a bridge is attained. In addition, by using a high-strength epoxy resin as a filler for filling the inside of the socket, for example, an adhesive strength several times higher than that of a conventional grout material can be obtained, so that the adhesive length with a cable such as a PC steel material can be reduced by several minutes. 1 can be suppressed. Therefore, the entire length of the socket can be suppressed, and the inner surface of the socket-side cross section does not need to be formed into a tapered shape as in the related art, so that the manufacturing cost and labor of the fixing device can be reduced.

  Moreover, even if a zinc-plated PC stranded wire is used as the cable, the fear of generating hydrogen gas can be eliminated unlike the cement grout because the epoxy resin is used as the filler.

  Therefore, it is possible to protect the cable penetrating the deflecting portion in the bridge, and it is possible to easily and efficiently exhibit good fixing performance for this cable.

  As described above, the embodiment of the present invention has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and can be variously modified without departing from the gist of the invention.

It is a figure showing the outline structure of the bridge example to which this embodiment is applicable. It is a figure which shows the procedure (a)-(c) in the cable protection method example 1 of this embodiment. It is a figure which shows the procedure (d)-(f) in Example 1 of the cable protection method and the fixing method of this embodiment. It is a figure which shows the (a) taper plate and (b) nut used for the cable protection method of this embodiment. It is a figure which shows the (a) cap used for the cable protection method of this embodiment, (b) a cap fixing ring, and (c) a spacer. It is a figure showing the section structure of the cable in this embodiment. It is sectional drawing which shows the cable fixing structure in this embodiment. It is a figure which shows the procedure (a) and (b) in Example 2 of the cable protection method and the fixing method of this embodiment. It is a figure which shows the procedure (c) and (d) in Example 2 of the cable protection method and the fixing method of this embodiment. It is a figure which shows the procedure (e) and (f) in Example 2 of the cable protection method and the fixing method of this embodiment. It is a figure which shows the procedure (a) and (b) in Example 3 of the cable protection method and the fixing method of this embodiment. It is sectional drawing which shows the cable fixing structure in the example 3 of the cable protection method and fixing method of this embodiment. FIG. 3 is a diagram illustrating an example of an integrated structure of a deflection tube, a tapered plate, and a socket in the embodiment. It is a figure which shows the cable protection structure in the deflection part in the example 4 of the cable protection method of this embodiment, and the fixing method.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Deflection part 2 Deflection tube 3 HDPE coated cable 4 Galvanized PC steel stranded bundle, bundled wire 5 Tapered plate, Plate 6 Socket 7 Epoxy resin 20 Inner tube 30 (Coating material removed)
50 Galvanized PC steel strand 51 Filler (or molding material)
52 High Density Polyethylene (HDPE)

Claims (17)

A method for protecting a cable passing through a deflection portion of a saddle structure in a bridge,
The cable is a prefabricated cable in which a bundle of a plurality of galvanized PC steel wires is formed into a substantially circular cross section with a filler, and the outer periphery of the formed bundle is covered with high-density polyethylene and integrally formed. Yes,
Of the cable passing through the deflection tube in the deflection section, at least in the deflection tube path, in the deflection tube, the step of removing the covering material of the abdominal pressure action section, which is the pressure contact section between the cable and the deflection tube ,
A step of inserting the cable having the coating material removed through the deflection tube,
Filling the deflection tube with an epoxy resin, and coating at least a portion of the cable from which the coating material has been removed with an epoxy resin,
A cable protection method comprising: A method for protecting a cable passing through a deflection portion of a saddle structure in a bridge,
The cable, at least a portion outside the deflection portion than the abdominal pressure action section, which is a pressure contact section between the cable and the deflection tube in the deflection section, at least the inside of which is subjected to a water stopping process,
Of the cable passing through the deflection tube in the deflection section, the step of removing the covering material of a portion corresponding to the abdominal pressure action section in at least the deflection tube in the deflection tube path,
A step of inserting the cable having the coating material removed through the deflection tube,
Filling the deflection tube with an epoxy resin, and coating at least a portion of the cable from which the coating material has been removed with an epoxy resin,
A cable protection method comprising: A method for protecting a cable passing through a deflection portion of a saddle structure in a bridge,
Of the cable passing through the deflection tube in the deflection section, at least in the deflection tube path, in the deflection tube, the step of removing the covering material of the abdominal pressure action section, which is the pressure contact section between the cable and the deflection tube ,
A step of inserting the cable having the coating material removed through the deflection tube,
Filling the deflection tube with an epoxy resin, and coating at least a portion of the cable from which the coating material has been removed with an epoxy resin,
Of a cable inserted through the deflection tube in the deflection unit and protruding from the surface of the deflection unit, removing a coating material of a predetermined length from the surface of the deflection unit;
Using a socket having an inner space capable of enclosing the predetermined length portion from which the covering material has been removed and enclosing the portion under predetermined airtightness, enclosing the predetermined length portion and leaving the inner space of the socket. Filling the epoxy resin;
A plate that is located between the socket and the surface of the deflecting unit and transmits the tension of the cable to the deflecting unit via an adhesive force between a predetermined length portion where the coating material is removed and the epoxy resin; Fixing to a socket and the deflection unit;
A cable protection method comprising: In claim 3,
The socket has a shape in which opposing inner surfaces are substantially parallel in a side cross section, and has a structure capable of being divided or opened in a cable length direction, and an injection port and an exhaust port of an epoxy resin. A method for protecting a cable, comprising: In claim 3 or 4,
A method for protecting a cable, comprising: the socket integrally including the deflection tube and the plate; and fixing the socket to the deflection unit. A method for protecting a cable passing through a deflection portion of a saddle structure in a bridge,
In the deflection unit, among the cable inserted through the inner tube of the deflection tube, at least in the inner tube of the inner tube path of the deflection tube, the site corresponding to press contact sections serving abdominal pressure acting section between the cable and the inner tube Removing the coating material;
A step of inserting the cable having the coating material removed through the inner tube ,
Prior to filling the inner tube of the deflection tube with epoxy resin, a process of stopping water between an end opening of the inner tube and the outer periphery of the cable,
For the injection port provided on the inner side of the deflection part than the position of the water stop processing in the inner pipe, filling the inner pipe with epoxy resin by filling with epoxy resin, at least the coating material of the cable is A step of coating the removed portion with an epoxy resin ,
A cable protection method comprising: In claim 6,
In the inner pipe, the filled epoxy resin is discharged from the inlet through an outlet provided at a position opposite to the inlet with the deflecting portion interposed between the deflecting portions and provided on the inner side of the deflecting portion with respect to the position of the water stopping process. A method for protecting a cable, wherein the filling of the epoxy resin is terminated when the cable is filled. In any one of claims 1 to 7,
A cable protection method, wherein the bridge is a truss bridge. It is a structure that protects the cable inserted into the deflection part of the saddle structure in the bridge,
The cable is a prefabricated cable in which a bundle of a plurality of galvanized PC steel wires is formed into a substantially circular cross section with a filler, and the outer periphery of the formed bundle is covered with high-density polyethylene and integrally formed. Yes,
At least in the deflecting tube in the deflecting tube, in the deflecting tube, a cable in which the covering material of a portion corresponding to the abdominal pressure action section which is a pressure contact section between the cable and the deflecting tube is inserted through the deflecting tube,
A cable protection structure, wherein the deflection tube is filled with epoxy resin, and at least a portion of the cable from which the coating material has been removed is coated with epoxy resin. It is a structure that protects the cable inserted into the deflection part of the saddle structure in the bridge,
The cable, at least a portion outside the deflection portion than the abdominal pressure action section, which is a pressure contact section between the cable and the deflection tube in the deflection section, at least the inside of which is subjected to a water stopping process,
A cable in which the covering material of a portion corresponding to the abdominal pressure action section in at least the deflection tube in the deflection tube in the deflection section is inserted through the deflection tube,
A cable protection structure, wherein the deflection tube is filled with epoxy resin, and at least a portion of the cable from which the coating material has been removed is coated with epoxy resin. It is a structure that protects the cable inserted into the deflection part of the saddle structure in the bridge,
At least in the deflecting tube in the deflecting tube, in the deflecting tube, a cable in which the covering material of a portion corresponding to the abdominal pressure action section which is a pressure contact section between the cable and the deflecting tube is inserted through the deflecting tube,
Filling the deflection tube with epoxy resin, covering at least the portion of the cable from which the coating material has been removed with epoxy resin,
In the cable protruding from the surface of the deflecting portion through the inside of the deflecting tube in the deflecting portion, a portion of the cable from which a predetermined length of the covering material has been removed from the surface of the deflecting portion has an inner space capable of enclosing the portion and has a predetermined sealing. Inclusivity using a socket that encloses the site with the nature, filling the interior of the socket with epoxy resin,
A plate that is located between the socket and the surface of the deflecting unit and transmits the tension of the cable to the deflecting unit via an adhesive force between a predetermined length portion where the coating material is removed and the epoxy resin; A cable protection structure fixed to a socket and the deflection unit. It is a structure that protects the cable passing through the deflection part of the saddle structure in the bridge,
At least in the inner tube of the inner tube path of the deflected tube in the deflection unit, the press contact sections serving abdomen to remove pressure acting section site dressings corresponding to cable the cable and the inner tube, the inner tube of the deflection tube Through,
Prior to filling the inner tube of the deflection tube with an epoxy resin, a water stop process is performed between an end opening of the inner tube and the outer periphery of the cable,
For the injection port provided on the inner side of the deflection part than the position of the water stop processing in the inner pipe, filling the inner pipe with epoxy resin by filling with epoxy resin, at least the coating material of the cable is A cable protection structure wherein the removed portion is covered with an epoxy resin . A structure having a structure for protecting a cable inserted into a deflection portion of a saddle structure in a bridge,
The cable is a prefabricated cable in which a bundle of a plurality of galvanized PC steel wires is formed into a substantially circular cross section with a filler, and the outer periphery of the formed bundle is covered with high-density polyethylene and integrally formed. Yes,
At least in the deflecting tube in the deflecting tube, in the deflecting tube, a cable in which the covering material of a portion corresponding to the abdominal pressure action section which is a pressure contact section between the cable and the deflecting tube is inserted through the deflecting tube,
A structure having a cable protection structure in which the deflection tube is filled with epoxy resin and at least a portion of the cable from which the coating material is removed is covered with epoxy resin. A structure having a structure for protecting a cable inserted into a deflection portion of a saddle structure in a bridge,
The cable, at least a portion outside the deflection portion than the abdominal pressure action section, which is a pressure contact section between the cable and the deflection tube in the deflection section, at least the inside of which is subjected to a water stopping process,
A cable in which the covering material of a portion corresponding to the abdominal pressure action section in at least the deflection tube in the deflection tube in the deflection section is inserted through the deflection tube,
A structure having a cable protection structure in which the deflection tube is filled with epoxy resin and at least a portion of the cable from which the coating material is removed is covered with epoxy resin. A structure having a structure for protecting a cable inserted into a deflection portion of a saddle structure in a bridge,
At least in the deflecting tube in the deflecting tube, in the deflecting tube, a cable in which the covering material of a portion corresponding to the abdominal pressure action section which is a pressure contact section between the cable and the deflecting tube is inserted through the deflecting tube,
Filling the deflection tube with epoxy resin, covering at least the portion of the cable from which the coating material has been removed with epoxy resin,
In the cable protruding from the surface of the deflecting portion through the inside of the deflecting tube in the deflecting portion, a portion of the cable from which a predetermined length of the covering material has been removed from the surface of the deflecting portion has an inner space capable of enclosing the portion and has a predetermined sealing. Inclusivity using a socket that encloses the site with the nature, filling the interior of the socket with epoxy resin,
A plate that is located between the socket and the surface of the deflecting unit and transmits the tension of the cable to the deflecting unit via an adhesive force between a predetermined length portion where the coating material is removed and the epoxy resin; A structure comprising a cable protection structure fixed to a socket and the deflection unit. A structure having a structure for protecting a cable passing through a deflection portion of a saddle structure in a bridge,
At least in the inner tube of the inner tube path of the deflected tube in the deflection unit, the press contact sections serving abdomen to remove pressure acting section site dressings corresponding to cable the cable and the inner tube, the inner tube of the deflection tube Through,
Prior to filling the inner tube of the deflection tube with an epoxy resin, a water stop process is performed between an end opening of the inner tube and the outer periphery of the cable,
For the injection port provided on the inner side of the deflection part than the position of the water stop processing in the inner pipe, filling the inner pipe with epoxy resin by filling with epoxy resin, at least the coating material of the cable is A structure having a cable protection structure in which a removed portion is covered with an epoxy resin . A fixing device for a cable that passes through a deflection portion of a saddle structure in a bridge,
In the cable protruding from the surface of the deflecting portion through the inside of the deflecting tube in the deflecting portion, a portion having a predetermined length from the surface of the deflecting portion from which the covering material has been removed has an inner space capable of enclosing the portion and has a predetermined hermeticity. A socket containing the part,
A filling portion filled with epoxy resin in the socket inner space including the predetermined length portion,
A plate that is located between the socket and the surface of the deflecting unit and that transmits the tension of the cable to the deflecting unit via an adhesive force between a portion of the predetermined length from which the coating material has been removed and the epoxy resin;
A cable fixing device comprising:

Images