JPS62174408A - Connecting block and its connection - Google Patents

Abstract

PURPOSE:To make the connection of blocks and the introduction of PS easier by a method in which holes through which PC steels are thrust are formed in the inside wall of the block, and a space to be inserted with a jack for dragging PC steels is formed through the holes in the inside wall. CONSTITUTION:Holes 46 through which PC steels 52 are thrust are formed in the corners 45 of blocks 41 and 51 for culvert, and spaces 45 large enough to insert a jack 19 through are formed in the inside wall of the block 41 in such a way as to connect the spaces 45 with the holes 46. The block 41 having the space 45 is properly combined with the block 51 without the space 45 and set, and PC steels 52 are thrust through the holes 46 of the blocks 41 and 51. One end of each PC steel 52 is fixed by nut 54 within the space 45, and the other end is tensed by the jack 19 inserted into the space 45.

Description

[Detailed Description of the Invention] [Industrial Application Field] The final product 1 is a block for underdrains for constructing water pipes and common ditches, blocks for open channels for forming waterways, blocks for retaining walls, etc. This invention relates to a connecting block and a connecting method thereof.

[Prior Art] Conventionally, as an underdrain block for configuring f water supply etc., for example, four parts are provided at the middle position of the four corners, and
It is known that both ends of these four parts are opened through insertion holes at both joint end faces of the underdrain block.

And these culvert blocks t-? Arrange several pieces of PC steel, and insert the threaded portion of the PC steel material into the insertion hole, so that the threaded portion at one end projects into the recess of the required underdrain block, and the threaded portion at the other end projects into the recessed portion of another block for underdrain,
These underdrain blocks are connected by fixing nuts to both threaded portions.

By the way, the four parts of a conventional underdrain block are for inserting a wrench when tightening a nut, and have only a small opening area, and these underdrain blocks are tightened and connected so that prestress is applied. for the 19th
The connections are made in the steps shown in Figures A, B, and C.

That is, first, as shown in FIG. 19A, the underdrain blocks b and c to be laid next are arranged on the connection proceeding side of the previously laid underdrain block a. Then, the PC steel material e is inserted into the insertion holes d of these underdrain blocks a, b, and c, and as shown in FIG. protrude into the recess fa of part a and fix the nut ga in the threaded part el, and at the same time make the other end threaded part e2 protrude into the recess f of the underdrain block C at the connecting advancing end, and fix the nut gc in the threaded part e2. Temporarily fasten. Thereafter, as shown in FIG. 19C, the tip of the tension rod i inserted from the joint end face on the connection proceeding side of the underdrain block C is made to protrude into the recess fc, and the protruding end is inserted through the coupler j. and connect it to the PC steel rod e. Then, this tension rod l is pulled by a hydraulic jack k supported on the joint end face of the underdrain block C on the connecting progress side to apply tension to the PC steel rod e, and in this state, the nut gC is fully tightened. do. After that, the traction by the hydraulic shirt +k is stopped, and the coupler j
and the tension bar i is removed.

[Problems to be Solved by the Invention] Therefore, according to such conventional technology, it is necessary to insert and remove the tension rod i using the coupler j to each PC steel rod e, which makes the work relatively complicated. There is a problem with becoming. In addition, since the jack k is brought into contact with the joint end face on the connection progressing side, tension can be applied to the PC steel material e.
If it is difficult to secure a space for arranging a jack at the final end of the underdrain block to be laid last, it will be difficult to tighten the final underdrain block.

This situation is the same when connecting open channel blocks and retaining wall blocks, and it becomes a serious problem especially when constructing the surrounding wall of a water tank by arranging retaining wall blocks in a ring. It has become. In other words, when creating a peripheral wall by connecting curved retaining wall blocks, connect them one after another, and then finally connect the joint end face of the last retaining wall block to the joint end face of the first retaining wall block. Therefore, it becomes impossible to employ the conventional connection method for the final connection part, and there is a problem that sufficient tension cannot be applied to the PC steel material.

An object of the present invention is to provide a connecting block and a connecting method thereof that can solve these problems all at once.

[Means for solving the problems] The first invention solves the above-mentioned problems5.
Furthermore, the present invention provides a connecting block that can be applied to structures other than blocks that are connected using prestressed steel materials, and its structure has a space into which a jack for pulling the prestressed steel materials can be inserted. Moreover, it is characterized in that it is provided with an insertion hole for inserting the PC steel material, which opens the end of the space to the joint end surface.

Further, the second invention provides a method for efficiently connecting a plurality of connecting blocks using the connecting block according to the first invention, and the second invention provides a method for efficiently connecting a plurality of connecting blocks using the connecting block according to the first invention. When connecting the connecting blocks of P
It has a space into which a jack for towing C steel material can be inserted, and
The end of the space is equipped with an insertion hole that opens to the joint end surface, and one end of the PC steel material inserted through the insertion hole of the connecting blower is attached to one of the connecting blocks. and the other end protrudes into the space,
After that, the tension is applied to the PC steel material with the jack inserted into the space i1, and then the other end of the PC steel material is
It is characterized in that the F garment is fixed.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Example 1 (Figures 1 to 9) Example 1 is a case where the present invention is applied to a circular water tank used as an initial sedimentation tank or a final sedimentation area in a water treatment plant.

FIG. 1 is a plan sectional view showing a single-assembly type circular aquarium, and FIG. 2 is a front sectional view thereof. As shown in these drawings, this circular water tank includes a cylindrical peripheral wall 2 formed by arranging a plurality of retaining wall blocks 1+"lq, which are connecting blocks, in the circumferential direction, and a base portion of this peripheral wall 2. 2a and a bottom plate 3 provided continuously.

As shown in FIG. 3, each retaining wall block 11 to 19 is a curved plate-shaped concrete block with a fan-shaped planar cross section, and has a flange 4 at its base 2a corresponding to the thickness of the bottom slab 3. are doing. In addition, each retaining wall block 11 to 19
The centers of curvature of the inner circumferential surface 1a and the outer circumferential surface 1b are on the center line n of the circular water tank, and when the left and right joining end surfaces 5 and 6 are extended, they are set so that they intersect on the middle 1L line n. It is. Therefore, these retaining wall blocks 11 to IQ
By joining these, a perfectly circular peripheral wall 2 is formed. A sealing material (not shown) made of water-covered rubber is interposed between the joint end surfaces 5 and 6 of each retaining wall block ll''lQ.

Further, each of the retaining wall blocks 11 to 19 is shown in FIG.

As shown in FIGS. 6, 8, and 9, four connecting boxes 9 made of carved metal and forming a space 8 into which a jack (to be described later) can be inserted are each opened on the outer peripheral surface lb. In addition, by embedding a sheath inside the block l, the space 8 in each connection box 9 is
A curved insertion hole 11 is provided which communicates with the end of the #i wall block l and opens the space 8 to each joint end surface 5.6.
1 and each can match. A PC steel rod 12, which is a PC steel material, is inserted into each of these insertion holes 11. Each PC steel bar 12 has threaded portions 12 on both ends.
a, 12b, and has 10,000 screws 12a formed at one end to connect to specific retaining wall blocks 11 to 1.
9 into the space 8 formed in the connecting box 9, and the other screw portion 12b formed at the other end of the retaining wall blocks 1 to 19 adjacent to that particular retaining wall block 11 to 19. Space 8 formed within the connection box 9
It is located in Then, in the space 8 in the connection box 9, nuts 14 are screwed into each of the threaded portions 12a and 12b via the anchor plate 13, and the nuts 14 are tightened to apply tension to the PC steel rod 12. Adjacent retaining wall blocks 11 and 17.12 and 1
3. Bow' and 19.19 and 11 are tightly connected to each other.

By the way, the detailed method of assembling such a circular water tank is as follows. First, recesses 15 that communicate with the various through holes 11 are provided on the outer surface of each of the retaining wall blocks 11 to 19, and the connection boxes 9 are accommodated in each of these recesses 15, respectively. That is, the connecting box 9 has a housing shape having a through hole 16 communicating with the insertion hole 11 in one end wall 9a, 9b, and is loosely fitted into the recess 15 with the opening facing outward. In this case, this connection box 9
and the recessed portion 15.
An easily deformable edge cutting layer 17 made of rubber, asphalt material, etc. is formed between the inner wall surfaces 15a and 15b of the retaining wall blocks 11 to 19, and such retaining wall blocks 11 to 19 are sequentially connected in the circumferential direction. Then, the surrounding wall 2 is constructed. In detail,
As shown in FIGS. 4 and 5, first, the 21% retaining wall block 12 is arranged next to the first retaining wall block 11 while being guided by the partially arcuate guide member 18. Then, the PC steel rods 12 are inserted into the respective insertion holes 11, and the screw portions 12a formed at one end of each of the PC steel rods 12 are inserted into the space formed in the connection box 9 of the first retaining wall block 11. 8, and the screw portion 12b formed at the other end is made to protrude into the space 8 formed in the connection box 9 of the second retaining wall block 1. Then, by screwing the nut 14 onto the screw part 12a on the one end side via the anchor plate 13, this one end side is attached to the retaining wall block 11, and at the same time, an anchor is also attached to the screw part 12b on the other end side. Temporarily insert the nuts 14 through the plate 13 into each connection box 9 of this second retaining wall block 12, as shown in FIG. A special center hole type hydraulic jack 19 manufactured according to the dimensions of the formed space 8 is inserted, and with these hydraulic jacks 19 applying tension to each PC steel rod 12 at the same time, each P
Nut 14 temporarily fastened to the other end threaded portion 12b of the C steel bar 12
After fully tightening and fixing, tighten each hydraulic jack 19.
Take it out of the connection box 9.

As shown in FIG. 7, the hydraulic jack 19 has a piston 23 integrally provided on the outer periphery of an operating shaft 22 having a center hole 21, and this piston 23 is slidably fitted into a sill 24, and the operating shaft Both ends of the cylinder 22 are exposed outside the cylinder 24. Pressure oil can be introduced into one end surface of the piston 23 through an oil introduction port 25, and the other end surface of the piston 23 is pressed by a return spring 26. A core member 29 having a screw hole 27 at the tip and a flange 28 at the base end is rotatably inserted into the center hole 21 of the operating shaft 22, and the PC is inserted into the screw hole 27 of the core member 29. The threaded portion 12b of the steel rod 12 can be screwed together. Therefore, when using this hydraulic jack 19, a frame-like spacer 32 is interposed between the anchor plate 13 and the cylinder 24 to form a gap 31 for tightening the nut, and then the PC steel rod 12 is The threaded portion 12b and the core material 29 are screwed together. After that, pressure oil is introduced into the oil introduction port 25, and the piston 23, operating shaft 22, and core member 29 are retracted.

The PC steel rod 12 is towed. In that state, spacer 3
A wrench (not shown) is inserted from the outside into the gap 31 formed by the nut 14, and the nut 14 is fully tightened. after that,
By releasing the pressure in the oil extraction boat 25 and moving the piston 23 and operating shaft 22 forward by the biasing force of the spring 26, the core material 29 is freed and unscrewed from the PC steel rod 12. Then, the hydraulic jack 19 and spacer 32 are taken out of the connection box 9.

The first retaining wall block 11 and the second retaining wall block 12 are tightly connected by the following procedure, but the second retaining wall block 12 and the third retaining wall block 13 . 3rd retaining wall block 13 and 4th retaining wall block 14 ... 8th retaining wall block 18 and 9th retaining wall block
The th (last) retaining wall block 19 is also connected by the same procedure. Furthermore, the connection between the last retaining wall block 19 and the first retaining wall block 11 is performed in the same manner. Note that since the guide member 18 is made in a shape having a curvature corresponding to one circumferential wall 2, the retaining wall blocks 11 to 11 are slid along the guide member 18 while sequentially sliding the guide member 18 in the circumferential direction. By sequentially arranging and connecting the retaining wall blocks 18, the retaining wall block 19 and the first retaining wall block 11 will finally match exactly.

In this way, all retaining wall blocks 11 to 19 are
When the C steel rods 12 are tightly connected, the tensile force of these PC steel bars 12 applies a tensile force to each connection box 9 in the circumferential direction, causing elongation in the circumferential direction. The elongation of 9 is absorbed by the deformation of the edge cutting layer 17. After completing all of the tightening using the PC steel rods 12, grout (not shown) is injected into the insertion hole 11 from the injection hole 13a provided in the anchor plate 13, and the connecting box 9 is injected into the insertion hole 11. The space 8 formed therein is filled with mortar (not shown).

On the other hand, the bottom slab 3 is made by pouring concrete between the tips of the flanges 4 of the retaining wall block 1, and has a central part for mounting a stirring device (not shown), etc. It has four parts 3a.

In addition, 33 is foundation chestnut stone, 34 is foundation concrete, 35
36 is the mortar, and 36 is the reinforcement.

In this way, one circular aquarium can be assembled by providing a space 8 communicating with the joint end surface 5.6 through the insertion hole 11 in the retaining wall blocks 11 to 19, which are the connecting blocks. A hydraulic jack 1 is inserted into the space 8 with the PC steel rod 12 inserted through the insertion hole 11.
9 to apply tension to the PC steel rod 12. Therefore, there is no need to insert or remove tension rods, couplers, etc., as in conventional products, and construction can be simplified. Moreover, the last retaining wall block 19
When connecting the first retaining wall block 11 to the first retaining wall block 11, tension is applied to the PC steel rod 12 using the hydraulic jack 19!
can be Therefore, all retaining wall blocks
It is easy to apply appropriate prestress to lq f@
becomes.

Embodiment 2 (FIGS. 10 and 11) Embodiment 2 is a case where the present invention is applied to a treatment tank of a small-scale sewage treatment facility. Therefore, this processing tank has a double cylindrical structure comprising a cylindrical inner wall A and a cylindrical outer wall B surrounding the inner wall A, and the inner space of the inner wall is used for sedimentation. Along with using it as Pond C.

An annular space formed between the mold temperature inner wall A and the outer wall B is used as an aeration tank D.

The inner wall A is formed by arranging a plurality (m) of retaining wall blocks IA+ to IAm, which are connecting blocks, in the circumferential direction. are connected by. In addition, the outer wall B is
Retaining wall blocks 11 that are a plurality of (n) connecting blocks
3+ to lBn are arranged in the circumferential direction, and are connected by PC steel rods in the same manner as the peripheral wall 2 of the first embodiment.

Embodiment 3 (Figures 12 to 14) This Embodiment 3 is a case where the connecting block is a culvert block, and the same parts as in Embodiment 1 are given the same reference numerals and explained. omitted.

These underdrain blocks 41+ and 412 have a bottom plate 42,
The side walls 43 and the top plate 44 are shaped like a rectangular cylinder, and a space 45 opening inward is formed at the middle position of the four corners thereof. Each space 45 is configured such that a hydraulic jack 19 can be inserted into the space 11, similar to that shown in the first embodiment, and is formed by fitting the connection box 9 into the recessed portion 15. Both ends of this space 45 are connected to the underdrain block 411.4 through the insertion hole 46.
It communicates with the joint end surfaces 47 and 48 of No. 12.

The underdrain blocks 41+ and 412 are the first
They are connected in the steps shown in Figures 4a and 4b. That is,
First, the underdrain block 51.41. which is to be laid next on the connecting progress side of the previously laid underdrain block 41+.
Arrange. In addition, the underdrain block 51 has the insertion hole 4
It is for intermediate interposition having only 6 and no empty 1u1145, and the required number is interposed as appropriate. Then, the PC steel rod 52 is inserted into the insertion hole 46 of these underdrain blocks 41+, 51, 412, and the threaded part 52a formed at one end of this PC#A rod 52 is installed in the underdrain plow 2.
Ri41! The nut 54 is fixed to the threaded portion 52a of the nut 54 through the anchor plate 53, and the threaded portion 52b formed at the other end is connected to the l of the connecting advancing end.
The l'f conduit block 412 is made to protrude into the space 45, and the nut 54 is temporarily screwed into the threaded part 52b. Thereafter, the hydraulic jacks 19 and spacers 32 are inserted into each space 45 of the underdrain block 417, and tension is applied to each of the PC steel bars 52 in the same manner as in the first embodiment. In this state, the nut 54 temporarily fastened to the threaded portion 52b at the other end of the PC steel rod 52 is fully tightened to fix it. After that, the hydraulic jack 19 and spacer 32 are pushed out of the space 45.

In this way, the underdrain block 41. ．． 51.412
It is possible to construct an underdrain by sequentially connecting .
7. A space 45 for discharging oil is provided at 48, and the PC steel rod 52 inserted into the insertion hole 46 is pulled by the hydraulic jack 19 inserted into the space 46 to remove the PC #14 rod 5.
I'm trying to give 2 stick swords to 2. Therefore, the 19th
Unlike the conventional device shown in the figure, there is no need to worry about inserting or removing tension rods, couplers, etc., and construction can be simplified. Moreover, with this connection method, even if there is no space to install a hydraulic jack at the final end of the last underdrain block, the tensioning work of the final PC steel rod can be done easily and reliably. It is something that can be done.

It should be noted that the connecting blocks are of course not limited to those in Example 1.2.3 above, and may be, for example, those shown in FIGS. 15 to 18, that is,
The connecting block 61 shown in FIG. 15 is for opening a drain at the top, and 62 is a space for inserting a jack;
3 is P which opens this space 62 to the joint end surface 64.65.
This is an insertion hole for inserting C steel material. Further, a connecting block 71 shown in FIG. 16 is a flat retaining wall block for constructing a linear retaining wall, 72 is a space for inserting a jack, and 73 is a connecting end face 74 of this space 72. 75 is an insertion hole for inserting a PC steel material. On the other hand, the connecting blocks 81 shown in FIG. 17 are cylindrical for constructing manholes, etc., and are stacked vertically.
Reference numeral 82 indicates a space for inserting a jack, and reference numeral 83 indicates an insertion hole for inserting a PC steel material, which opens this space 82 to the joint end surface 84.85. Further, a connecting block 91 shown in FIG. 18 is a square block for constructing a processing material storage tank, etc., 92 is a space for inserting a jack, and 93 is an opening of this space 92 into a joint end surface 94.95. This is an insertion hole for inserting a PC steel material. In addition, it can be applied to connection blocks of various shapes and uses.

Further, the PC steel material for tightly connecting the connecting blocks is not limited to a steel bar, and may be, for example, a strand or the like. Since it is difficult to form a fastener, a fastener other than a nut may be used. Examples of fasteners other than nuts include a ring-shaped cone that loosely fits around the outer periphery of the end of the prestressing steel material. , and a grip having a wedge-shaped cross section that is driven between the inner periphery of the cone and the PC steel material and grips the PC steel material.

Furthermore, the manner of use of the connecting block according to the invention recited in claim 1 is not necessarily limited to the above-mentioned embodiments. It may also be a manhole block or the like that is tightly connected with steel material.

Effect 1 of the invention Since the present invention has the above-described configuration, it is possible to tighten and connect the PC steel material without using tension rods or couplers, and moreover, there is no need for jacks etc. on the bar terminal connection end side. It is possible to provide a connecting block and a connecting method thereof, which can apply appropriate tension to a prestressed steel material without any inconvenience even when a space for arranging the prestressing steel material cannot be secured.

[Brief explanation of drawings]

1 to 9 show one embodiment of the present invention, in which FIG. 1 is a plan sectional view, FIG. 2 is a front sectional view, FIG. 3 is a perspective view of a retaining wall block as a connecting block, and FIG. Figure 4 is a perspective view for explaining the method of joining retaining wall blocks, Figure 5 is a plan view of the same,
Fig. 6 is a front view showing a space for explaining the method of applying tension to prestressing steel, and Fig. 7 is an enlarged partially cutaway front view showing a hydraulic jack used to apply tension to prestressing steel. , FIG. 8 is a plan sectional view showing the space immediately after connection, and FIG. 9 is a front view thereof. Fig. 1θ and Fig. 11 show other embodiments of the present invention, in which Fig. 1θ is a plan view;
Figure 1 is a front sectional view. 12 to 14 a and b show other embodiments of the present invention, FIG. 12 is a perspective view, FIG. 13 is a cross-sectional view, and FIG. 14 a and b are diagrams for explaining the connection method. It is an explanatory diagram. FIGS. 15, 16, 17, and 18 are perspective views showing other embodiments of the present invention. FIGS. 19A, B, and C are explanatory diagrams showing a conventional example. 11~lq, IA+ -1Aa, IB+ ~lBn
...Connection block (retaining wall block) la...Inner peripheral surface 1b--Outer peripheral surface 2...Peripheral wall 2a-
・Base portion 3...Bottom plate 3a-...Concave portion 4...Flash flange 5, 6...Joint end surface 8...Space 9...Connection box 9a, 9b*--End wall 9al, 9b1 ・・・End face 11・IIe insertion hole 12・Fist・PC steel material (PC steel bar) 12a, 12b・Threaded part 13・Anchor plate 13a・・6 Inlet 14・Meeting・Fixing tool (nut) 15 ... ψ concave portion 15a, 15b*a temple inner wall surface 16... through hole 17... edge cutting layer 18, frame, guide member 19 fist φ, hydraulic jack 21, φ, center hole 22... operating shaft 23 -... Piston 24... Cylinder 25, φ, Oil lead-in/out port 26, 111 + Return spring 27... Threaded hole 2811... Flange 29@...
Core material 31 fist, gap 32... Spacer 33, pot, foundation stone 34...
Foundation concrete 35... mortar 36... reinforcing bars 41, . 417 eΦ11 connection block (underdrain block) 42...bottom plate 43--side wall 44Φ...old version 45 fist...space 46...insertion hole 47.48---joint end surface 51...underdrain block 52...PC steel material 52a...-one end screw portion 52b-
φ・Other end screw portion 53・Eye anchor plate 54・1 nut 61・Connection block 62・Space 63・e・Insertion hole 64.65・
・Joining end surface 71...Φ connection block 72...Space 73...Through hole 74.75...
Connection end face 8111Φ・Connection block 82・Connection space 83・・φ insertion hole 84.85・・
- Connection end surface 91 - Connection block 92 - Space 93 - Insertion hole 94.95 -
・Joint end surface

Claims (2)

[Claims] (1) A PC that has a space into which a jack for towing PC steel can be inserted, and the end of the space is opened to the joint end surface.
A connecting block characterized by being equipped with an insertion hole for inserting steel material. (2) When a plurality of connecting blocks arranged with their joining end surfaces abutted against each other are tightly connected using a prestressed steel material, at least one of the connecting blocks has a space into which a jack for pulling the prestressed steel material can be inserted, and , with an insertion hole opening the end of the space to the joint end surface,
One end of the PC steel material inserted into the insertion hole of the connecting block is fixed to one of the connecting blocks, and the other end is made to protrude into the space, and then the jack inserted into the space is used to A method for connecting connecting blocks, which comprises applying tension to a prestressed steel material and then fixing a fastener to the other end of the prestressed steel material.