JP2006241735A - Connection structure and connection method between blocks of cylindrical structure by precast partial blocks - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure and a connection method between blocks of a cylindrical structure by precast partial blocks having high proof stress and constructible in a short construction period. <P>SOLUTION: The cylindrical structure is constructed by connecting a large number of precast arcuate partial blocks 26 constituting a part of a cylindrical or elliptic cylinder, in the circumferential and centerline directions of the cylinder. The circumferential side joint end faces 26a, 26b of the partial blocks adjacent to each other on the circumferential side of the cylinder are joined in mutually abutting arrangement, and reinforcing members 34 of bar shape are inserted in both reinforcing member insertion holes 32, 36 communicating with each other, of both joint ends while straddling both arcuate partial blocks 26, 26. Clearances between the peripheries of the reinforcing members 34 and the inner surfaces of the reinforcing member insertion holes 32, 33 are filled with grout. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention mainly relates to a connecting structure between blocks of a cylindrical structure by a precast partial block constituting a cylindrical structure such as a PC well or a bridge pier, and a connecting method thereof.

  A cylindrical structure used as a PC well structure or a bridge pier is known to be constructed by sequentially connecting a plurality of annular short cylindrical bodies in the central axis direction. By constructing the body with precast concrete blocks, it is possible to significantly shorten the construction period, such as not requiring a concrete curing period at the construction site.

  However, if the cylindrical structure to be constructed has a large diameter, the short cylinder constituting the cylindrical structure also becomes large, and is loaded on a transportation means such as a large truck that transports the short cylinder from the production site to the construction site. Since this is not possible, the short cylindrical body is divided into a plurality of partial blocks, molded, transported for each partial block, and the partial blocks are joined at the construction site to form a short cylindrical body.

  The joining structure in the circumferential direction of each partial block is a structure in which the joining surfaces of adjacent partial blocks are abutted with each other, and the joining surfaces are bonded together with an adhesive, as shown in FIG. There is known a structure in which a joining plate 2 is disposed on one joining surface portion and the joining plates 2 and 2 are connected to each other by a bolt 4 through a recess 3 provided on the back surface portion.

  Also, the positions of the partial blocks adjacent to each other in the central axis direction are shifted from each other in the circumferential direction, and PC tension members are inserted through the partial blocks continuous in the central axis direction to reinforce each other. It has a structure that matches.

Moreover, as shown in FIG. 8, the edge part of the reinforcing bars 6 and 6 embed | buried toward the circumferential direction of this block 5 is protruded from the circumferential direction both ends of the partial blocks 5 and 5, and the partial blocks 5 and 5 which adjoin each other. There is also known a structure in which reinforcing bars 6 and 6 protruding from the ends of the steel plates are connected to each other via a coupler 7 such as a coupler, and a cast-in-place concrete is placed in a gap 8 between the partial blocks 5 and 5. ing. Reference numeral 9 in the figure denotes a positioning device comprising a jack used to keep the gap between the partial blocks 5 and 5 constant.
Japanese Patent Laid-Open No. 06-073994

  However, in the structure in which the conventional adhesive or bolt is used as described above, there is a problem that the proof stress is low because no reinforcing bars are arranged between adjacent partial blocks.

  On the other hand, in the structure in which reinforcing bars are connected by gaps between the partial blocks and concrete is cast in the gaps, the reinforcing bars are embedded in the joints, so it has high strength. There is a problem that the construction period becomes long because a certain period of time is required, and there is also a problem that the construction cost increases due to the equipment costs of the positioning device and the concrete placing equipment for keeping the gap between the partial blocks.

  Therefore, in view of the above-described problems of the prior art, the present invention has an object to provide an inter-block coupling structure for a cylindrical structure by a precast partial block that has high proof strength and can be constructed in a short construction period and a coupling method thereof. To do.

  In order to solve the above-described conventional problems and achieve the intended object, the invention according to claim 1 is directed to a cylinder circumferential direction and a cylinder center line in a precast partial block constituting a part of a cylinder or an elliptic cylinder. In the cylindrical structure constructed by connecting many in the direction, the circumferential side joining end faces of the partial blocks adjacent to each other on the cylindrical circumferential side are joined in abutment with each other, and the both joining end parts communicate with each other A reinforcing material having a rod shape or an arc shape is inserted into both the reinforcing material insertion holes arranged so as to straddle both partial blocks, and a gap between the periphery of the reinforcing material and the inner surface of the reinforcing material insertion hole is filled with grout. It is characterized in that it is an inter-block coupling structure of a cylindrical structure by a precast partial block.

  The invention according to claim 2 is a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of a cylinder or an elliptic cylinder in the cylinder circumferential direction and the cylinder center line direction, and the cylinder The circumferential side joining end surfaces of the partial blocks adjacent to each other on the circumferential side are joined to each other in a butted arrangement, and the reinforcing material in the form of a rod is inserted into the reinforcing material insertion hole of the both communicating end parts communicating with each other. In the formation of the inter-block joint portion in which the gap between the periphery of the reinforcing material and the inner surface of the reinforcing material insertion hole is filled with grout, reinforcement of both joint portions between the partial blocks adjacent in the circumferential direction The material insertion hole is formed to have a diameter that allows the rod-shaped reinforcing material to slide in the longitudinal direction, and the length of one reinforcing material insertion hole is formed to a depth that allows the rod-shaped reinforcing material to be accommodated over the entire length thereof. Back of the reinforcing material insertion hole The reinforcing material push-out means introduction passage is opened to the opening, and the other reinforcing material insertion hole is formed in advance so as to accommodate only a part of the rod-shaped reinforcing material. After the rod-shaped reinforcing material is accommodated over the entire length in the hole, the joint surfaces are joined in abutting arrangement, and then the pushing means is inserted through the reinforcing material pushing-out means introduction path, and the rod-shaped reinforcing material is reinforced on the other side. The rod-shaped reinforcing material is slid to a position straddling both reinforcing material insertion holes by extruding to the material inserting hole side, and then between the blocks of the cylindrical structure by the precast partial block filling both the reinforcing material insertion holes with grout It is a combination method.

  The invention according to claim 3 is characterized in that, in addition to the configuration of claim 2, the reinforcing material insertion hole is formed in an arc shape in the circumferential direction of the partial block.

  According to a fourth aspect of the present invention, in addition to the constitution of the second or third aspect, the extrusion means is constituted by a flexible push rod having flexibility, and the flexible push rod is arranged on the inner peripheral surface portion of the partial block. Alternatively, it is inserted from the reinforcing material push-out means introduction path opened in the outer peripheral surface portion, and the bar-shaped reinforcing material which is accommodated over the entire length in one reinforcing material insertion hole is pushed out to the other reinforcing material insertion hole side by the flexible push rod. It is characterized by that.

  The invention according to claim 5 is a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of a cylinder in the cylinder circumferential direction and the cylinder center line direction, and is arranged on the cylinder circumferential side. The circumferential side joining end surfaces of the adjacent partial blocks are joined in abutment with each other, and an arc-shaped reinforcing material is inserted across the both partial blocks so as to be inserted into the reinforcing material insertion holes arranged to communicate with each other. In the formation of the inter-block joint where the gap between the periphery of the reinforcing material and the inner surface of the reinforcing material insertion hole is filled with grout, the reinforcing material insertion holes of both joint portions between the partial blocks adjacent in the circumferential direction are formed. One is opened in the cylinder inner periphery or cylinder outer periphery of the partial block, the other is formed in an arc shape opened in the circumferential joint end surface, and after joining both the joint surfaces in a butt arrangement, the arc-shaped reinforcing material is Inner cylinder or cylinder A cylindrical structure with a precast partial block that is inserted into the reinforcing material insertion hole from the circumferential opening, slides the arc-shaped reinforcing material to a position straddling both the reinforcing material insertion holes, and then fills both the reinforcing material insertion holes with grout. It is a method for connecting objects between blocks.

  The inter-block connection structure of the cylindrical structure by the precast partial block according to the present invention is constructed by connecting a number of precast partial blocks constituting a part of a cylinder or an elliptical cylinder in the cylinder circumferential direction and the cylinder center line direction. In both reinforcing material insertion holes of the tubular structure, the circumferential side joining end faces of the partial blocks adjacent to each other on the cylindrical circumferential side are joined to each other in abutting arrangement, and the joining end parts are in communication with each other. A rod-shaped reinforcement material is inserted across both partial blocks, and the gap between the periphery of the reinforcement material and the inner surface of the reinforcement material insertion hole is filled with grout. And the yield strength of the entire structure is improved.

A bar-shaped reinforcing material can be suitably arranged between the blocks according to the present invention, and no on-site concrete is required, so that the construction period is shortened and the construction cost can be reduced.
The method includes a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of a cylinder or an elliptic cylinder in the cylinder circumferential direction and the cylinder center line direction, and adjacent to each other in the cylinder circumferential direction side. The joining end surfaces of the matching partial blocks in the circumferential direction are joined to each other in a butted arrangement, and a reinforcing material in the form of a rod is inserted across the both partial blocks in the reinforcing material insertion holes arranged to communicate with each other at both joint ends, When forming an interblock connecting portion in which a gap between the periphery of the reinforcing material and the inner surface of the reinforcing material insertion hole is filled with grout, the reinforcing material insertion holes on both joint surfaces between the partial blocks adjacent in the circumferential direction are The rod-shaped reinforcing material is formed to have a diameter that is slidable in the longitudinal direction, and the length of one reinforcing material insertion hole is formed to a depth at which the rod-shaped reinforcing material is accommodated over the entire length thereof, and Reinforcement pusher at the back The introduction path is opened in communication, and the other reinforcing material insertion hole is formed in advance to a depth where only a part of the rod-shaped reinforcing material is accommodated, and the rod-shaped reinforcing material is inserted into the one reinforcing material insertion hole. In a state where the two joint surfaces are joined to each other in a state of being accommodated over the entire length, the pushing means is inserted through the reinforcing material pushing means introduction path, and the rod-like reinforcing material is placed on the other reinforcing material insertion hole side. By pushing the rod-shaped reinforcing material to a position straddling both reinforcing material insertion holes, and then filling the reinforcing material insertion holes with grout, the rod-shaped reinforcing material can be suitably arranged between the blocks. In addition, since no cast-in-place concrete is required, the construction period is shortened and the construction cost can be reduced.

  By forming the reinforcing material insertion hole in an arc shape in the circumferential direction of the partial block, the reinforcing material insertion hole can be suitably slid.

  The extruding means is constituted by a flexible extruding rod having flexibility, and the flexible extruding rod is inserted from a reinforcing material extruding means introduction path opened in an inner peripheral surface portion or an outer peripheral surface portion of the partial block, and the flexible The rod-shaped reinforcing material is preferably pushed out to the other reinforcing material insertion hole side by extruding the rod-shaped reinforcing material accommodated in the one reinforcing material insertion hole over the entire length to the other reinforcing material insertion hole side. In addition, the equipment is simple and inexpensive.

  In a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of a cylinder in the cylinder circumferential direction and the cylinder centerline direction, the circumferential direction side of the partial blocks adjacent to each other in the cylinder circumferential direction side The joining end surfaces are joined to each other in a butted arrangement, and a reinforcing material in the form of a rod is inserted across both partial blocks in the reinforcing material insertion holes arranged so as to communicate with each other at both joint ends. When forming the inter-block joint where the gap with the inner surface of the reinforcing material insertion hole is filled with grout, the reinforcing material insertion hole of the joint portion between the partial blocks adjacent to each other in the circumferential direction, one of the inner circumference of the partial block cylinder or Opened to the outer periphery of the cylinder, the other is formed in an arc shape opened to the circumferential joint end surface, and after joining both the joint surfaces in a butt arrangement, the arc-shaped reinforcing material is attached to the inner circumference of the cylinder or the outer circumference of the cylinder Insert reinforcement from the opening The reinforcing material is suitably placed between the blocks by inserting into the hole, sliding the arc-shaped reinforcing material to a position straddling both reinforcing material insertion holes, and then filling the reinforcing material insertion holes with grout. The construction period can be shortened and the construction cost can be reduced because no cast-in-place concrete is required.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a PC well structure as an example of a cylindrical structure. In the figure, reference numeral 20 denotes a PC well structure, and reference numeral 21 denotes a steel blade.

  In this PC well structure 20, a plurality of annular short cylinders 22, 22... Are sequentially pressed into the ground A, and are connected to connect the short cylinders 22, 22. Thus, it is formed in a long cylindrical shape in the ground A.

  PC tension members 23, 23... Are inserted into the peripheral wall of the PC well structure 20 in the cylindrical central axis direction (hereinafter simply referred to as the axial direction), and the PC tension members 23, 23. Axial prestress is introduced into the object.

  As shown in FIG. 2, the PC tension member 23 is tensioned at the upper end of each short cylindrical body 22, fixed on the bearing plate 25 by the fixing tool 24, and the upper PC tension member 23 is connected to the fixing tool 24. The short cylinders 22 adjacent to each other in the central axis direction are connected at the same time as prestress is sequentially applied, and the short cylindrical bodies 22 are connected in the central axis direction.

  As shown in FIG. 3, the short cylindrical body 22 is formed by connecting three arc-shaped precast arc-shaped partial blocks 26, 26,.

  In addition, each short cylindrical body 22 is provided with tag members 27, 27 made of a steel plate, a PC steel stranded wire or the like on the outer periphery.

  Further, each short cylindrical body 22 has an arrangement in which arc-shaped partial blocks 26 and 26 adjacent in the central axis direction are displaced from each other in the circumferential direction, that is, one short cylindrical body 22 adjacent in the axial direction is the other short cylinder. The body 22 is disposed at a position shifted by a predetermined angle in the circumferential direction.

  As shown in FIG. 3, each arc-shaped partial block 26 is formed by a precast concrete block in an arc shape obtained by equally dividing the ring into three parts, and a joint end portion in the center axis direction of the ring (hereinafter simply referred to as an axial direction). Is formed with a recess 28 surrounded by an edge.

  In this arc-shaped partial block 26, PC tension material insertion holes 29, 29... Penetrating in the axial direction are formed at regular intervals in the circumferential direction, and the PC tension material 23 for introducing prestress is inserted into this. It is like that.

  Note that a fixing pressure plate 25 for fixing the end portion of the PC tension material 23 is provided at the upper end opening edge of the PC tension material insertion hole 29.

  Further, in the arc-shaped partial block 26, reinforcing material insertion holes 30, 30... Penetrating in the axial direction are formed at intervals between the PC tension material insertion holes 29, 29.

  The short cylindrical body 22 is connected in the axial direction, and a reinforcing material 31 made of a PC steel stranded wire, a reinforcing bar, or the like is inserted into the reinforcing material insertion hole 30 that is continuous in the axial direction. A non-shrink mortar is filled in the gap between the inner surface of the hole 30.

  Further, at one circumferential end of the arc-shaped partial block 26, reinforcing material insertion holes 32, 32 arranged on the outer side and the inner side of the PC tension material insertion hole 29 are formed, and a reinforcing material push-out means is introduced into the inner part thereof. The path 33 is in communication.

  The reinforcing material insertion hole 32 is formed in an arc shape whose longitudinal direction is directed in the circumferential direction of the arc-shaped partial block, and the rod-shaped reinforcing material 34 is accommodated over the entire length of the reinforcing material insertion hole 32 so as to be slidable in the circumferential direction. The rod-shaped reinforcing member 34 can protrude from the circumferential joining end surface 26a.

  The reinforcing material insertion hole 32 is formed such that the inner diameter of the joining end surface side portion 32a is larger than the intermediate portion thereof, and the rod-shaped reinforcing material 34 is slidable in the longitudinal direction.

  The rod-shaped reinforcing material 34 is formed in an arc shape with a round steel bar, and the length thereof is formed to be substantially the same as the circumferential length of the reinforcing material insertion hole 32, and is accommodated in the reinforcing material insertion hole 32 over the entire length. It has become so.

  The reinforcing material push-out means introduction path 33 is formed in communication with the reinforcing material insertion hole 32, that is, opens to the inner peripheral surface portion or outer peripheral surface portion of the arc-shaped partial block 26, and the joining end surface of the reinforcing material insertion hole 32 extends from this peripheral surface portion. 26a is formed toward the end opposite to 26a, and a flexible extrusion rod 35 having flexibility as an extrusion means is inserted from the reinforcement material extrusion means introduction path 33, and the rod-shaped reinforcement material 34 is inserted into the reinforcement material. It pushes out from the hole 32.

  The flexible extruded bar 35 is formed in a round bar shape with a synthetic metal material arranged around the core material having flexibility as a core material, and deformed into the reinforcing material extrusion means introduction path 33. It is made to pass through and can be inserted into the reinforcing material insertion hole 32.

Further, at the other circumferential end portion of the arc-shaped partial block 26, reinforcing material insertion holes 36, 36 disposed on the outer side and the inner side of the PC tendon material insertion hole 29 are formed. The reinforcing material insertion holes 36 formed in an arc shape in the circumferential direction are formed so as to correspond to the positions of the reinforcing material insertion holes 32 and 32, that is, in such a manner that the reinforcing material insertion holes 32 and 36 communicate with each other. In a state where the joint end faces 26a, 26b of the arc-shaped partial blocks 26, 26 are abutted with each other, the rod-shaped reinforcing material 34 pushed out from the reinforcing material insertion hole 32 of one adjacent arc-shaped partial block 26 is inserted.

  The reinforcing material insertion hole 36 has a diameter that is substantially the same as the inner diameter of the joining end surface side portion 32a of the reinforcing material insertion hole 32, that is, a slidable diameter, and is a depth in which only a part (about half) of the rod-shaped reinforcing material 34 is accommodated. The rod-shaped reinforcing member 34 formed and inserted in this manner can be slid in the reinforcing member insertion hole 36 to a position where the tip end portion is stopped by the back surface 36a.

  As shown in FIG. 5, the connecting portion between the arc-shaped partial blocks 26 and 26 has a structure in which the joining end surfaces 26a and 26b of the adjacent arc-shaped partial blocks 26 and 26 are joined to each other in a butted arrangement. An adhesive is interposed between the joint portions, that is, between the joint end surfaces 26a and 26b facing each other.

  Further, the inter-block connecting portion has reinforcing material insertion holes 32 and 36 arranged so as to communicate with each other, and both arc-shaped partial blocks 26 and 26 are straddled in both the reinforcing material insertion holes 32 and 36 to form a rod shape. The reinforcing material 34 is inserted, and the gap between the periphery of the rod-shaped reinforcing material 34 and the inner surfaces of the reinforcing material insertion holes 32 and 36 is filled with grout, thereby being connected.

  In addition, since the tag members 27 and 27 are disposed on the outer periphery of the short cylindrical body 22 and a certain strength is ensured, the grout filled in the reinforcing material insertion holes 32 and 36 of the interblock connecting portion is cured. Even during the period, the short cylindrical body 22 can be pressed into the ground.

  Further, in order to sufficiently fill the grout, the arc-shaped partial block 26 may be provided with discharge holes 40, 40... Communicating with the reinforcing material insertion holes 32, 36 and opened in the inner peripheral surface portion or the outer peripheral surface portion of the block. preferable.

  By doing in this way, high yield strength is acquired in the circumferential direction connection part between each partial block, and high yield strength is obtained also in the whole structure.

  In order to connect the arc-shaped portion blocks 26, 26, first, the adjacent arc-shaped portion blocks 26, 26 are joined together with the joining end faces 26a, 26b being brought into contact with each other via an adhesive.

  At this time, the rod-shaped reinforcing material 34 is accommodated over the entire length in the reinforcing material insertion hole 32 and is in a state of being retracted from the joining end surface 26 a of the arc-shaped partial block 26.

  Then, the flexible push-out rod 35 is inserted into the reinforcing material push-out means introduction path 33, and the flexible push-out bar 35 is projected into the reinforcing material insertion hole 32 through the reinforcing material push-out means introduction path 33. The end of the bar-shaped reinforcing material 34 is pushed by the tip of 35, and the bar-shaped reinforcing material 34 is pushed out to the circumferential reinforcing material insertion hole 36 side.

  As shown in FIG. 4, the extruded bar-shaped reinforcing member 34 protrudes from the circumferential joining end surface 26a of one adjacent arc-shaped partial block 26 and slides to a position straddling both the reinforcing member insertion holes 32, 36. The other arc-shaped partial block 26 is held against the reinforcing material insertion hole inner surface 36a.

  Thereafter, the flexible extruded rod 35 is pulled out from the reinforcing material pushing-out means introducing passage 33, and grout is poured from the reinforcing material pushing-out means introducing passage 33, and the periphery of the rod-like reinforcing material 34 and the inner surfaces of the reinforcing material insertion holes 32 and 36 are formed. And the inside of the reinforcing material push-out means introduction path 33 is filled with grout.

  At this time, air in the reinforcing material insertion holes 32 and 36 is sucked from the discharge holes 40 and 40 and the inside of the reinforcing material insertion holes 32 and 36 is decompressed so that the grout is sufficiently filled.

  Then, when the grout is sufficiently filled, the grout is cured, and the rod-shaped reinforcing material 34 is inserted into both the reinforcing material insertion holes 32, 36 communicating with each other so as to straddle both arc-shaped portion blocks 26, 26. Blocks 26 and 26 are combined.

  The inter-block connection structure may be a structure as shown in FIG. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the arc-shaped partial block 26, arc-shaped reinforcing material insertion holes 50 and 51 are formed at both ends in the circumferential direction in place of the reinforcing material insertion holes 32 and 36 and the push-out means introduction path 33 of the arc-shaped partial block 26 shown in FIG. ing.

  The reinforcing material insertion holes 50 and 50 are formed in an arc shape in which one side is opened on the inner or outer circumferential surface of the arc-shaped partial block 26 on the inner and outer sides of the end portion and the other is opened on the circumferential joint end surface 26a. The reinforcing member 52 has such a diameter that it can slide freely.

  Similarly, the reinforcing material insertion holes 51, 51 are formed in an arc shape in which one side is opened on the inner peripheral surface or outer peripheral surface of the arc-shaped partial block 26 on the inner and outer sides of the end portion, and the other is opened on the circumferential joint end surface 26b. The inner diameter is such that the reinforcing member 52 can slide freely.

  The reinforcing material insertion holes 50 and 51 formed in the adjacent arc-shaped partial blocks 26 and 26 are both formed with the same radius of curvature, and the joining end surfaces 26a and 26b of the adjacent arc-shaped partial blocks 26 and 26 are arranged to face each other. When joined, they are arranged to communicate with each other.

  The reinforcing member 52 is formed of a round steel material in an arc shape having substantially the same radius of curvature as the reinforcing member insertion holes 50 and 51.

  As shown in FIG. 6, the inter-block coupling structure of the cylindrical structure by the arc-shaped partial blocks 26 and 26 is joined in such a manner that the joining end surfaces 26a and 26b of the adjacent arc-shaped partial blocks 26 and 26 are in contact with each other. In this structure, an adhesive is interposed in the joint portion, that is, between the joint end surfaces facing each other.

  Further, the inter-block connecting portion has reinforcing material insertion holes 50 and 51 arranged in communication with each other, and the arc-shaped partial blocks 26 and 26 are straddled in both the reinforcing material insertion holes 50 and 51. The reinforcing member 52 is inserted, and the gap between the periphery of the arc-shaped reinforcing member 52 and the inner surface of the reinforcing member insertion holes 50 and 51 and the gap portion of both the reinforcing member insertion holes 50 and 51 are filled with the grout 53, and are joined together. ing.

  In order to connect the arc-shaped portion blocks 26, 26, first, the adjacent arc-shaped portion blocks 26, 26 are joined together with the joining end faces 26a, 26b being brought into contact with each other via an adhesive.

  By doing in this way, the arc-shaped reinforcement material insertion holes 50 and 51 formed in the junction part of the adjacent arc-shaped partial blocks 26 and 26 are mutually connected.

  Thereafter, the arc-shaped reinforcing material 52 is inserted into the reinforcing material insertion hole 50 from the inner peripheral opening and the outer peripheral opening of any one of the blocks, and further, the reinforcing material 52 is pushed, so that the reinforcing material 52 is inserted approximately halfway in the insertion direction. Is projected from the joining end face 26a and is slid to a position where it is inserted into the reinforcing material insertion hole 51, that is, a position straddling both the blocks 26 and 26. At this time, since the reinforcing material 52 is formed in an arc shape, it can be smoothly inserted and slid.

  Then, in such a state that the reinforcing material 52 is inserted into the reinforcing material insertion holes 50 and 51, grout is injected into the reinforcing material insertion holes 50 and 51 from the inner peripheral opening and the outer peripheral opening of one block 26 to reinforce. The gap between the material insertion holes 50 and 51 and the reinforcing material 52 and the space between the reinforcing material insertion holes 50 and 51 are filled with a grout 53.

  Then, the filled grout 53 is cured, and the arc-shaped reinforcing members 52 are inserted through both the arc-shaped partial blocks 26 and 26 into both the communicating reinforcing-material insertion holes 50 and 51, so that both the arc-shaped partial blocks 26 and 26 are inserted. Join.

  In the above-described embodiment, the PC well structure 20 in which the cylindrical structure is submerged is described as an example. However, the cylindrical structure is installed on the ground like a pier. In addition, other cylindrical structures such as a tunnel lining may be used, and the cylindrical structure may be an elliptical cylinder, a rectangular cylinder, or the like in addition to a cylinder.

  Further, in the above-described embodiment, the arc-shaped partial block 26 having the shape equally divided into three parts has been described. However, the shape may be equally divided into two parts or evenly divided into a plurality of parts. You may make it comprise a short cylinder by the partial block.

  In the above-described embodiment, the example in which the reinforcing material insertion holes are provided as a pair on both the inner and outer sides of the partial block 26 has been described.

It is a front view which shows an example of the cylindrical structure which has the block connection structure which concerns on this invention. It is a partial expanded sectional view of a cylindrical structure same as the above. It is a top view which shows a center axial direction joining surface part same as the above. It is sectional drawing which shows the partial block in FIG. It is sectional drawing which shows the connection structure between the blocks of the partial block which concerns on this invention. It is sectional drawing which shows another example of the connection structure between the blocks of the partial block which concerns on this invention. It is sectional drawing which shows an example of the junction part structure of the conventional partial block. It is sectional drawing which shows another example of the junction part structure of a partial block same as the above.

Explanation of symbols

20 PC well structure (tubular structure)
21 Steel Blade 22 Short Cylinder 23 PC Tension Material 24 Fixing Tool 25 Bearing Plate 26 Partial Block 27 Tag Member 28 Recess 29 PC Tension Material Insertion Hole 30 Reinforcement Material Insertion Hole 31 Reinforcement Material 32 Reinforcement Material Insertion Hole 33 Reinforcement Material Extrusion Means introduction path 34 Bar-shaped reinforcing material 35 Flexible extruded rod 36 Reinforcing material insertion hole 40 Discharge hole 50, 51 Reinforcing material insertion hole 52 (arc-shaped) reinforcing material 53 Grout

Claims (5)

In a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of the cylinder in the cylinder circumferential direction and the cylinder centerline direction,
Reinforcing materials in the form of rods or arcs in both reinforcing material insertion holes in the circumferential direction side joining end surfaces of the partial blocks adjacent to each other in the cylinder circumferential direction are joined in abutment with each other and the joining end portions communicate with each other. Is inserted across both partial blocks, and the gap between the periphery of the reinforcing material and the inner surface of the reinforcing material insertion hole is filled with grout. Bond structure. In a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of a cylinder in the cylinder circumferential direction and the cylinder centerline direction, the circumferential direction side of the partial blocks adjacent to each other in the cylinder circumferential direction side The joining end surfaces are joined to each other in a butted arrangement, and a reinforcing material in the form of a rod is inserted across both partial blocks in the reinforcing material insertion holes arranged so as to communicate with each other at both joint ends. When forming the inter-block joint where the gap with the inner surface of the reinforcing material insertion hole is filled with grout,
Reinforcing material insertion holes at both joint portions between adjacent blocks in the circumferential direction are formed in a diameter that allows the rod-shaped reinforcing material to slide in the longitudinal direction, and the length of one reinforcing material insertion hole is the length of the reinforcing material insertion hole. It is formed to a depth that can be accommodated over its entire length, and a reinforcing material push-out means introduction passage is opened to the back of the reinforcing material insertion hole, and the other reinforcing material insertion hole is formed in the rod-shaped reinforcing material. Pre-formed to a depth that only a part is accommodated,
After the rod-shaped reinforcing material is accommodated over the entire length of the one reinforcing material insertion hole, the joint surfaces are joined in a butt arrangement, and then the pushing means is inserted through the reinforcing material pushing-out means introduction path, Slide the rod-shaped reinforcing material to the position straddling both reinforcing material insertion holes by pushing the reinforcing material to the other reinforcing material insertion hole side,
After that, a method for joining the cylindrical structures by the precast partial block, characterized in that both the reinforcing material insertion holes are filled with grout.   The method for inter-block coupling of cylindrical structures by precast partial blocks according to claim 2, wherein the reinforcing material insertion holes are formed in an arc shape in the circumferential direction of the partial blocks.   The extruding means is constituted by a flexible extruding rod having flexibility, and the flexible extruding rod is inserted from a reinforcing material extruding means introduction path opened in an inner peripheral surface portion or an outer peripheral surface portion of the partial block, and the flexible 4. Between the blocks of the cylindrical structure by the precast partial block according to claim 2 or 3, wherein the rod-shaped reinforcing material accommodated in one reinforcing material insertion hole is pushed to the other reinforcing material insertion hole side by the extruding rod. Join method. In a cylindrical structure constructed by connecting a number of precast partial blocks constituting a part of a cylinder in the cylinder circumferential direction and the cylinder centerline direction, the circumferential direction side of the partial blocks adjacent to each other in the cylinder circumferential direction side The joining end faces are joined to each other in a butted arrangement, and an arcuate reinforcing material is inserted across both partial blocks into the reinforcing material insertion holes arranged to communicate with each other at both joining end portions, When forming the inter-block joint where the gap with the inner surface of the reinforcing material insertion hole is filled with grout,
Reinforcing material insertion holes in the joint portion between the partial blocks adjacent in the circumferential direction are formed in an arc shape in which one is opened in the cylinder inner periphery or cylinder outer periphery of the partial block, and the other is opened in the circumferential joint end surface,
After joining the joint surfaces in a butt arrangement, the arc-shaped reinforcing material is inserted into the reinforcing material insertion hole from the opening on the inner periphery or the outer periphery of the tube, and the arc-shaped reinforcing material is straddled across both the reinforcing material insertion holes. Slide to
After that, a method for joining the cylindrical structures by the precast partial block, characterized in that both the reinforcing material insertion holes are filled with grout.

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