JP6229974B2 - Method for forming ring-shaped concrete structural material - Google Patents

Description

  The present invention relates to a method for forming a ring-shaped concrete structure material that is assembled into a shape in which a PC-well, a bridge pier, or other cylindrical concrete structure is cut into a ring shape.

  Conventionally, when constructing tower-like structures such as PC wells, piers, and columns of wind power generation facilities, concrete structures assembled in a ring shape are stacked in the axial direction, and the PC is made to penetrate through the wall thickness in the axial direction. There is a method of constructing a hollow cylindrical structure having a necessary length by connecting with each other by applying prestress with a tension material (for example, Patent Document 1).

  The ring-shaped concrete structural material used for the construction of this type of structure is a ring-shaped concrete structure made by joining a plurality of precast blocks for forming a ring in the circumferential direction and connecting these joints. I use it.

  As shown in FIGS. 11 (a) and 11 (b), each precast block is connected to a reinforcing bar 2 embedded inside and outside both ends of each precast block 1 in the circumferential direction of the precast block 1, respectively. The box-shaped joint member 3 is opened to the outer periphery and inner periphery of the end of the precast block 1 and the box-shaped peripheral wall 3a is exposed to the joint surface between the precast blocks 1. And by fixing the precast blocks 1 and 1 to each other and joining them to the peripheral walls 3a and 3a facing each other, as shown in FIGS. 12 (a) and 12 (b), Instead of the box-shaped joining member, the buried plate 5 made of a metal plate is exposed and buried on the bottom surface of the recess 6 formed on the inner peripheral surface and the outer peripheral surface of the end portion of each precast block 1. In addition, in a state where the precast block 1 is joined, the connecting plate 7 made of a steel plate is overlapped over the outer peripheral surfaces of the embedded plates 5 and 5 that are arranged to face each other. A method is known in which the precast blocks 1 and 1 are connected by welding to both the embedded plates 5 and 5 and the recess 6 is filled with mortar after the connection (Patent Document 1).

  On the other hand, when connecting concrete structural members, for example, columns and beams made of precast concrete, a joint using a tubular joint member generally called a sleeve joint is used. This sleeve joint is embedded in the end of the precast concrete member with a reinforcing bar or steel rod embedded in one of the precast concrete members inserted into one end of the tubular joint member having a tubular shape made of steel. Insert a connecting steel material such as a reinforcing bar or a steel rod protruding from the end of the precast concrete member from the other end of the tubular joint member, and inject a solidifying material into the gap in the tubular joint member, It connects by solidification of a material (patent document 2).

  In addition, the cylindrical joint member is embedded in the joint opening with the tip opening exposed to the joint surface in a state in which the tubular joint member is fixed to the reinforcing bar in one concrete member in advance by welding or screwing, and the other concrete member is embedded in the tip opening. Inserting a connecting steel material such as a reinforcing bar and integrating the connecting steel material and the cylindrical joint member with a solidifying material, etc. There is a connection method in which a steel material is inserted and a cylindrical joint member and a connection steel material are integrated by a solidifying material.

JP 2004-143785 A Japanese Patent Laid-Open No. 10-147978

  However, in the joining method between the precast blocks as shown in FIG. 12 above, since the joining portion between both precast blocks is connected by bolting, the whole is integrally formed at the joining portion of the precast block. In order to give the strength close to that of a ring-shaped concrete structure material, it is necessary to make a special structure such as increasing the thickness of the joining side wall of the joining member, which increases the cost of parts and production. There was a problem of becoming.

  In the joining method between the precast blocks as shown in FIG. 13, the above problem has been solved, but when the diameter of the ring-shaped concrete structure material to be formed is large and transportation on the road in the assembled state is not possible, There is a problem that it is necessary to transport the precast block to a construction site and perform welding work at the construction site, and the welding work itself at the construction site requires a lot of work and high technology, resulting in high costs.

  On the other hand, a connecting method using a sleeve joint as shown in Patent Document 2 or a cylindrical joint member similar to this and a connecting steel material is conventionally used to connect between precast blocks for forming a ring-shaped concrete structure material. Was not used.

  This is because, when the precast blocks are connected one by one in order, the space for one precast block finally remains, and the precast block is placed in the thickness direction or width direction thereof, that is, the radius of the ring-shaped concrete structure material. Must be fitted in the remaining space after moving in the direction or axial direction, in which case it is necessary to move in the direction perpendicular to the axial direction of the sleeve joint, and the last precast block cannot be connected by the sleeve joint It seems to be caused by what has been considered.

  In the present invention, in view of such a conventional situation, the blocks are connected to each other in a ring shape by using a sleeve joint or, similarly to this, using a tubular joint member and a connecting steel material to be fitted thereto. The purpose of the present invention is to provide a method for forming a ring-shaped concrete structure material that can be quickly and easily assembled.

The first feature of the method for forming a ring-shaped concrete structure material of the present invention for solving the conventional problems as described above is that the ring-shaped concrete structure material is divided into a plurality of divisions of three or more in the circumferential direction. previously formed the mold blocks, the plurality of split blocks, wherein one of the joint surface of the ring-shaped concrete structural members circumferential direction, is embedded a connecting steel material has a rod in a state where its tip protrudes In addition, a cylindrical joint member into which the connecting steel material of the multi-part block connected to the other is inserted is buried with its end face exposed, and one ring-shaped concrete structure material The number of the plurality of divided blocks required to form a plurality of divided blocks are adjacent to each other with a space between the joint surfaces of the blocks being wider than the protruding length of the connecting steel material. Place the assembly workbench on combined orientation between bonding surfaces of the click, by a plurality of split blocks, junction surfaces between the respective plurality split blocks to approach by maintaining a state of facing each other, the coupling A method for forming a ring-shaped concrete structure material in which a steel material is inserted into the tubular joint member disposed oppositely and connected in a ring shape , and the multiple work block is placed on the upper surface of the assembly work table. A plurality of radially arranged slide rails are provided for each of the plurality of divided blocks, and the back surface of each of the plurality of divided blocks placed on the slide rail is pressed on the slide rail. using an assembly device comprising a plurality split type block moving means for moving toward the radial center of the slide rail Te, on the assembly bench slide rail, wherein The multi-divided blocks are placed on a ring-like arrangement in which the joint surfaces are spaced apart from the protruding length of the connecting steel material, and the back surfaces of the multi-divided blocks are simultaneously pressed by the multi-divided block moving means. Then, the connecting steel materials of one joint surface that are moved toward the radial center of the slide rail and face each other are inserted into the cylindrical joint member of the other joint surface to be assembled in a ring shape .

In the second feature of the present invention , in addition to the first feature, the assembly work table has a ring shape that matches the shape of the inner peripheral surface of the ring-shaped concrete structure material centered on the central portion of the radial arrangement. It is provided with an arrangement guide member .

  According to a third feature of the present invention, in addition to the first or second feature, a plurality of the slide rails are provided per one divided block, and each of the plurality of slide rails is provided on the slide rail via a slide pad. It is to put a divided block.

According to a fourth feature of the present invention , in addition to any one of the first to third features, the plurality of divided block moving means is a hydraulic jack supported on the slide rail. An object of the present invention is to use an assembling apparatus having a pair of hydraulic jacks for pressing the back surface of each block.

In the present invention, a plurality split blocks for constructing a-ring-like concrete structure material is one of the joint surface of the ring-shaped concrete structural members circumferential direction, projecting its tip connecting steel material with a rod-like The cylindrical joint member into which the connecting steel material of the multi-divided block connected to the other is inserted is embedded in a state where the end face is exposed, The number of the plurality of divided blocks necessary for constituting a ring-shaped concrete structural material is divided into a plurality of divided blocks adjacent to each other in a state in which the joint surfaces of the blocks are spaced apart from each other by a distance larger than the protruding length of the connecting steel material. Installed on the assembly work table with the joint surfaces of the blocks facing each other, and maintaining the multi-part block so that the joint surfaces between the multi-part blocks are facing each other. By connecting the steel members for connection into the cylindrical joint members opposed to each other and connecting them in a ring shape, it is possible to join all of the plurality of divided blocks. However, since the joint surfaces facing each other are brought close to each other, the joint surfaces can be connected to each other in a state where the tubular joint member and the connecting steel material inserted into the tubular joint member are arranged in a straight line. A cylindrical joint member can be used for assembling the structural material with a plurality of divided blocks, and the connection between the plurality of divided blocks can be achieved by a simple operation and at a low cost.

In the present invention, a plurality of multiple split blocks constituting a-ring-like concrete structure material, the assembly work platform to be loaded in a state in which opposed their joint surfaces, the ring-shaped to said set upright workbench top side of the An assembling apparatus having a guide member installed in an arrangement of an inner peripheral surface shape of a concrete structural material, and a plurality of divided block moving means for moving each of the plurality of divided blocks on the assembly work table toward the guide member side The plurality of divided blocks are placed on the outside of the guide member on the assembly work table in a state where the joint surfaces are spaced apart from each other by a distance wider than the protruding length of the connecting steel material. The mold block is moved to the guide member side by the plural-divided mold block moving means, and the connecting steel material of one joint surface facing each other is inserted into the cylindrical joint member of the other joint surface. And by the fact that as assembled in a ring shape, it becomes possible to perform bonding between all said plurality of split blocks at the same time, short assembly time, it is efficiently assembled.

In the present invention , the assembly work table is provided with a plurality of radially arranged slide rails per one divided block, and each precast concrete block is placed on the slide rail via a sliding pad. As a result, the assembly work table can be simplified, and the slide operation for joining the plurality of divided blocks becomes easy.

In the present invention, the multiple split block moving means is a hydraulic jack which is supported on said slide rails, each plurality split blocks, and to a pair of hydraulic jacks for pressing the back surface, respectively As a result, an assembling operation using the arc-shaped plural-divided blocks to form a cylindrical ring-shaped concrete structure can be efficiently performed in a short time.

It is a top view which shows an example of the assembly apparatus for implementing this invention method, and a concrete member. It is a longitudinal cross-sectional view same as the above. It is a top view which shows the state by which the ring-shaped concrete structure material was assembled on the apparatus same as the above. It is a top view of the ring-shaped concrete structure material formed by this invention. It is a front view same as the above. FIG. 3 is a partially omitted cross-sectional view of the multi-part block constituting the ring-shaped concrete structure. It is a cross-sectional view which shows the connection state between the multiple division | segmentation type blocks of a ring-shaped concrete structural material. It is a partial longitudinal cross-sectional view same as the above. It is a longitudinal cross-sectional view which shows the other example of the joint structure used for this invention. (A) (b) It is explanatory drawing which shows the further another example of this invention method. An example of the connection method between the several division type blocks in the conventional ring-shaped concrete structure material is shown, (a) is a front view, (b) is a cross-sectional view. The other example of the connection method between the several division type blocks in the conventional ring-shaped concrete structure material is shown, (a) is a front view, (b) is a cross-sectional view.

  Next, embodiments of the present invention will be described based on examples shown in the drawings. 4 to 8 show a cylindrical ring-shaped concrete structure material A formed by the method of the present invention. This ring-shaped concrete structural material A is composed of four arc-shaped blocks 11a, 11b,..., Which are formed by dividing a cylindrical shape into four equal parts in the circumferential direction. In the figure, reference numerals 12 and 13 denote joint surfaces of the plurality of divided blocks 11a, 11b,.

  Each of the plurality of divided blocks 11a, 11b... Is formed such that the joint surfaces 12, 13 are cut at an angle obtained by cutting the ring-shaped concrete structure material A by a plane passing through its central axis. Arranged in parallel with each other on the inner peripheral surface side and the outer peripheral surface side of the plurality of divided blocks 11a, 11b... In the arcuate direction, and arranged in multiple stages in the width direction of the plurality of divided blocks. The inner peripheral side reinforcing bar 20 and the outer peripheral side reinforcing bar 21 are embedded in the inner side.

  One end of each of the reinforcing bars 20 and 21 is a linear connecting steel member 20b whose front end protrudes by a predetermined length on the joint surface 12 on one side of the plurality of divided blocks 11a, 11b. , 21b. The connecting steel materials 20 b and 21 b are projected in a direction perpendicular to the joint surface 12.

  Cylindrical joint members 25 and 26 are provided at positions corresponding to the inner peripheral side reinforcing bars 20 and the outer peripheral side reinforcing bars 21 on the joint surface 13 on the other side of the plurality of divided blocks 11a, 11b. It is buried with the end face exposed.

  Each cylindrical joint member 25, 26 is oriented in a direction perpendicular to the joint surface 13 of the plurality of divided blocks 11a, 11b, that is, the radius of curvature of the precast concrete blocks 11a, 11b. Embedded in a horizontal direction perpendicular to the direction, and formed at the end of each reinforcing bar 20 or 21 in the reinforcing bar insertion port 31 on the inner end face of the multi-partition type block of the cylindrical joint members 25 and 26. The in-joint insertion portions 20a and 21a are inserted to the vicinity of the center of each tubular joint member.

  Each joint insertion portion 20a, 21a is a straight line in which the ends of the reinforcing bars 20, 21 are bent so as to coincide with the direction of the tubular joint member so as to be inserted into the central portions of the tubular joint members 25, 26. It is formed in a shape.

  Solid tube injection pipes 35a and 35b project from the outer circumferences of both end portions of the tubular joint members 25 and 26, respectively. The solidifying material injection pipes 35a and 35b communicate with the inside of the corresponding cylindrical joint members 25 and 26, and the solidifying material injection pipes 35a and 35b of the cylindrical joint members 25 and 26 are communicated with each other. The projecting side end is exposed and opened on the inner peripheral surface or the outer peripheral surface of the multi-divided block 11, and the solidifying material is inserted into the tubular joint members 25 and 26 from one side of the solidifying material injection tubes 35a and 35b. 36 is injected to fill the internal gap and solidify, so that the connecting steel members 20b and 21b are integrally connected in the respective tubular joint members 25 and 26.

  The assembly apparatus 40 shown in FIGS. 1-2 is used for formation of the ring-shaped concrete structure material A using the four division | segmentation type | mold blocks 11a, 11b ... comprised in this way. The assembling apparatus 40 includes an assembling work table 41, a guide member 42, and a plurality of divided block moving means 43.

  The assembly work table 41 includes a plurality of steel laying plates 45 whose upper surfaces placed on the concrete base 44 are positioned on the same horizontal plane, and a foundation frame member 46 made of I-shaped steel supported on the steel laying plate 45. , And a plurality of slide rails 47 made of I-shaped steel fixed in a horizontal radial arrangement thereon. In the figure, 46 a is a connecting I-shaped steel that connects the floor plates 45, 45 in the central portion and supports the radial center side end of the slide rail 47.

  The guide member 42 is formed by bending L-shaped steel into a circular ring shape, and is fixed on the slide rail 47 with the center of the circular ring shape being concentric with the radial center of the slide rail 47, The outer periphery is formed to have the same diameter as the inner periphery of the ring-shaped concrete structure A to be assembled.

  In addition to the continuous circular shape, a plurality of guide members 42 may be formed at a position corresponding to the shape of the inner peripheral surface of the ring-shaped concrete structure material A with a plurality of intervals.

  A hydraulic jack is used for the plural-divided block moving means 43. A cylinder portion 43a is fixed on each slide rail 47, and the push-out shaft 43b is moved in and out toward the radial center of the slide rail 47. ing. The back surface of each of the plurality of divided blocks 11a to 11d is pressed by a pressing element 43c fixed to the tip of the extrusion shaft.

  In the assembly work table 41, at the outer position of the guide member 42, all of the plurality of divided blocks 11a to 11d for constituting one ring-shaped concrete structural material A are connected to the joint surfaces 13 and 13 of the plurality of divided blocks. The space between the steel plates 20b and 21b for connection is placed in a state of being spaced apart by a wider interval. For each of the plurality of divided blocks 11 a to 11 d, both end portions on the back surface thereof are simultaneously pushed out in the center direction by a pressing element 43 c constituting the divided block type moving means 43.

  In this example, a multi-divided block having a shape in which a cylindrical ring is equally divided into four is assembled, and two slide rails 47 are used for one multi-divided block. The multi-divided block moving unit 43 is supported by 47, and one multi-divided block is operated by the two multi-divided block moving units 43.

In addition, one ring-shaped concrete structural member A may be divided into three or more divided parts such as three or more divided parts, or a plurality of divided blocks may be used. However, the ring-shaped concrete structure material A may be assembled and formed by a plurality of divided blocks having an unevenly divided shape. In any of these cases, two or more blocks may be formed for one divided block. The slide rail 47 is arranged so that the slide rail 47 is used.

  The multi-divided block moving means 43 may have a structure in which one is used for one multi-divided block in addition to two used for one multi-divided block.

  Next, a method for forming a ring-shaped concrete structure material according to the present invention using the assembly apparatus will be described. As shown in FIG. 1, one ring-shaped concrete structural material A is formed between the pressing member 43c and the guide member 42 in a state where the pressing member 43c of the multi-part block moving means 43 is retracted. All the plurality of divided blocks 11a to 11d are arranged in a circular arrangement. A sliding pad (not shown) may be interposed between the lower surface of each of the plurality of divided blocks 11a to 11d and the upper surface of the slide rail 47 as needed to facilitate the sliding of the plurality of divided blocks.

  Further, at this time, the plurality of divided blocks 11a to 11d are joined to each other in a state where the joint surfaces 12 and 13 face each other in a state of being spaced apart from the protruding length of the connecting steel materials 20b and 21b. It is set as the arrangement | positioning which the front-end | tip of the connection steel materials 20b and 21b of the other multi-partitioning type block faced to the reinforcing bar insertion port 31 of the cylindrical joint members 25 and 26.

  In this state, the pusher 43c of each of the plurality of divided block moving means 43 is pushed out and brought into contact with the back of each of the plurality of divided blocks 11a to 11d, and all the plurality of divided blocks 11a to 11d are directed toward the guide member 42. In other words, the ring-shaped concrete structure material A to be assembled is moved toward the center.

  Accordingly, the radius of the circle formed by the plurality of divided blocks 11a to 11d is gradually reduced, the space between the joint surfaces 12 and 13 is narrowed, and the tubular joint member 25 of one of the plurality of divided blocks is between adjacent joint surfaces. , 26, the leading ends of the connecting steel members 20b, 21b of the other multi-divided block are inserted into the reinforcing bar insertion ports 31.

  In this way, as shown in FIG. 3, all the plurality of divided blocks 11 a to 11 d are pushed out until they come into contact with the guide member 42, so that the joint surfaces 12 and 13 are joined to form the ring-shaped concrete structural material A. It is.

  In this state, the solidified material 36 is injected into each of the cylindrical joint members 25 and 26 using one of the solidifying material injection pipes 35a and 35b as a solidifying material injection port and the other as a discharge port. The completion of filling is confirmed by discharging the solidified material from the discharge port. After the injection, the solidified material 36 is awaited to be solidified, the ring-shaped concrete structure material A is removed from the assembling apparatus 40, and the ring-shaped concrete structure material forming operation is completed.

In the above-described embodiment, an example is shown in which a multi-partition block having a shape obtained by dividing a circle into four parts is used. However, each of the four-partition multi-partition blocks is formed by connecting a plurality of blocks in advance. It may be .

Further, in the above embodiment, a so-called sleeve joint is used in which a plurality of divided blocks are connected by inserting the ends of the reinforcing bars of each block from both ends of the cylindrical joint members 25 and 26 and injecting solidified material. In addition, as shown in FIG. 9 , the reinforcing bars 51 in the multi-split block are fitted into the block inner end of the tubular joint member 50 embedded in the end of one multi-split block by screws or crimping. The connecting steel material 52 protruding from the other divided block is inserted from the joint end face side opening of the tubular joint member 50, and a solidifying material 53 such as mortar is injected and integrated. In addition to the so-called sleeve joint, the connecting steel material protruding from the joint end face of the other multi-partition block is inserted into the cylindrical joint member embedded and opened in one multi-partition block joint surface. It can be applied to the whole thing to fix.

In addition to the circular ring shape as described above, the ring-shaped concrete structural material A formed according to the present invention includes a plurality of divided blocks 55a, 55b in which a square ring 55 as shown in FIG. ..., a method of forming by using a plurality of divided blocks 56a, 56b,..., A method of forming a plurality of oval rings 56 as shown in FIG. Applicable to the formation of structural materials.

A Ring-shaped concrete structural material 11a, 11b, 11c, 11d Multi-divided block 12, 13 Joint surface 20 Inner peripheral side reinforcing bar 21 Outer peripheral side reinforcing bar 20a, 21a Joint internal insertion portion 20b, 21b Connecting steel member 25, 26 Cylindrical joint Member 31 Reinforcing bar insertion port 35a, 35b Solidifying material injection pipe 36 Solidifying material 40 Assembly device 41 Assembly work table 42 Guide member 43 Multi-partition block moving means 43a Cylinder portion 43b Extrusion shaft 43c Presser 44 Concrete base 45 Steel floor 46a Connecting I-shape steel 47 Slide rail 50 Cylindrical joint member 51 Reinforcing bar 52 Connecting steel 53 Solidified material 55 Square ring 55a, 55b, 55c, 55d Multiple divided block 56 Oval ring 56a, 56b, 56c, 56d Multiple divided Mold block

Claims (4)

Previously formed multiple split type block shape obtained by dividing a ring-shaped concrete structure member circumferentially divided into three or more into a plurality, the plurality of split blocks, joining surface of the ring-shaped concrete structural members circumferential direction A cylindrical joint member into which the connecting steel material of the multi-divided block connected to each other is inserted is embedded in a rod-like connecting steel material in a state where the tip protrudes. It is buried with the end face exposed,
A plurality of the divided blocks necessary for constituting one ring-shaped concrete structural material are adjacent to each other in a state where the joint surfaces of the blocks are spaced apart from each other by a distance larger than the protruding length of the connecting steel material. multiple split blocks between bonding surfaces oriented together in placed on the assembly work bench, a plurality of split blocks, the junction surface between the respective plurality split blocks to approach by maintaining a state of facing each other fit According to the method for forming a ring-shaped concrete structure material, wherein the connecting steel material is inserted into the tubular joint member disposed opposite to be connected in a ring shape ,
The assembly workbench is provided with a plurality of radially arranged slide rails on the upper surface of the plurality of divided blocks so that there are a plurality of divided rails per one divided block.
On the slide rail is used an assembly apparatus provided with a plurality of divided block moving means for pressing the back surfaces of the plurality of divided blocks mounted on the slide rail and moving them toward the radial center of the slide rail. And
On the slide rail of the assembly work table, each of the plurality of divided blocks is placed in a ring-like arrangement in which the joint surfaces are spaced apart by a wider distance than the protruding length of the connecting steel material, and the back surface of each of the plurality of divided blocks Are simultaneously pressed by the plural-divided block moving means and moved toward the radial center of the slide rail, and the connecting steel material of one joint surface facing each other is inserted into the tubular joint member of the other joint surface A method for forming a ring-shaped concrete structural material characterized in that it is assembled into a ring shape. 2. The ring-shaped concrete structure according to claim 1, wherein the assembly work table includes a ring-shaped arrangement guide member that matches a shape of an inner peripheral surface of the ring-shaped concrete structure material centered on a central portion of the radial arrangement. Material forming method.   The molding of the ring-shaped concrete structure material according to claim 1 or 2, wherein a plurality of the slide rails are provided per one multi-divided block, and each of the multi-divided blocks is placed on the slide rail via a sliding pad. Method. The multi-divided block moving means is a hydraulic jack supported on the slide rail, and uses an assembling apparatus including a pair of hydraulic jacks that press the back surface of each multi-divided block. The molding method of the ring-shaped concrete structure material of any one of 1-3.

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