JPS6027875B2 - Joint structure of concrete pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint structure for concrete pipes used for constructing various pipes such as drainage, and particularly to a joint structure using a socket-type joint.

(Prior art) In the conventional joint structure using a socket-type joint, as shown in Fig. 9, two concrete pipes are connected to a socket formed at the end of one concrete pipe, and the end of the other concrete pipe is Water is stopped at the joint by inserting a section into the joint, and water is stopped at the joint by packing loaded between the outer circumferential surface of the inserted concrete pipe end and the inner circumferential surface of the socket.

(Problems to be Solved by the Invention) However, in this conventional structure, since several packings are held between the outer peripheral surface of the end of the concrete pipe and the inner peripheral surface of the socket, the weight of the concrete pipe acts directly on the packing.

As a result, the packing tends to become excessively compressed and lose its elasticity, creating a gap in the upper part of the joint, allowing external water to enter the pipe or internal water to leak out. In addition, since two adjacent concrete pipes are simply joined together, the joints may become misaligned due to the influence of tonosho, causing water leakage or flooding.

Therefore, an object of the present invention is to provide a joint structure for concrete pipes that has sufficient joint strength to resist soil erosion and the like, and does not reduce water-stopping performance. (Means for Solving the Problems) As explained below using reference numerals in the attached drawings, the concrete pipe joint structure according to the first aspect of the present invention has a socket at one end of the concrete pipe 1. 2, and a flange 5 is provided on the other end 4 of the concrete pipe 1 so as to protrude from the end surface 4a by an amount corresponding to the depth of the socket 2, and a flange 5 is provided on the other end 4 of the concrete pipe 1. A receiving register 6 and a receiving groove 7 are provided at at least two upper and lower locations on the surface and the outer peripheral surface of the flange portion 5, respectively, and bolts 20 and 21 are screwed into the bottom surface 9 of each receiving groove 6 and the bottom surface 10 of the receiving groove 7, respectively. insert 1
1 and 12 are buried, an annular stepped portion 15 is provided at the edge of the closure device of the socket portion 2, and an annular groove portion 1 is provided on the inner bottom surface of the socket portion 2.
6, attach water stop packings 17 and 18 to the annular step 15 and annular groove 16, insert the end 4 of one concrete pipe 1 into the socket 2 of the other concrete pipe 1, and connect the A communication plate 8 is mated to each receiving groove 6 of the socket part 2 and a receiving groove 7 of the collar part 5, and the communicating plate 8 is closely supported on the bottom surface of each of the receiving grooves 6 and 7. Said bolt 2
0 and 21, the end surface 5a of the collar portion 5 presses the water stop packing 17, and the end surface 4a of the end portion 4 presses the water stop packing 18.

Further, in addition to the above-described concrete pipe joint structure according to the first invention, the concrete pipe joint structure according to the second invention of the present invention is such that one of the through holes 13 of the communication plate 8 A long hole in the direction, connecting plate 8
A stopper 22 is provided protrudingly on the outside of the through hole 13, and the eccentric seat plate 2 has two bolts passing through the through hole 13.
3 is supported by the side surface of the stopper 22.

(Embodiment) In the embodiment of the first invention shown in FIGS. 1 to 5, the through holes 13 and 14 of each bridge portion of the connecting plate 8 are formed in the shape of a round hole, and each insert 1 1 and 12 is formed in the shape of a round hole. It is fixed to an anchor bar 19 on the main body of the concrete pipe 1.

Attaching the water stop packing 17 to the annular groove 16;
Attaching the water stop packing 18 to the annular stepped portion 15 is as follows:
This is done in the factory if necessary. In the embodiment of the second invention shown in FIGS. 6 to 8, the through hole 14 at the end of the connecting plate 8 is formed in the shape of a round hole, and the bolt 21 screwed into the insert 12 through the hole 14 is formed in the shape of a round hole. Although it is strongly tightened from the beginning, the bolt 20, which is screwed into the insert 11 through the through hole 14 formed in the elongated hole, is temporarily tightened weakly at first.

Push one concrete pipe 1 in its length direction, press the water stop packing 17 with the end surface 5a of the collar 5, and
After pressing the water stop packing 18 with the end surface 4a of the
The seat plate 23 is rotated around the bolt 20, and its peripheral surface is brought into contact with the side surface of the stopper 22. Finally, the bolt 20 is fully tightened. (Effect of the first invention)
In the joining structure of the first invention, the end 4 of one concrete pipe 1 is not only inserted into the socket part 2 of the other concrete pipe 1, but also the socket part 2 is inserted from the end surface 4a of the end 4 of the concrete pipe 1. A collar portion 5Z is provided protrudingly shifted toward the socket portion 2 side by an amount corresponding to the depth of Inserts 11 and 12 are respectively buried in the bottom surface 9 of each receiving groove 6 and the bottom surface 10 of receiving groove 7, and each receiving groove 6 and The connecting plate 8 is iron-fitted to the receiving groove 7, and the bolts 20 and 21 inserted through the through holes 13 and 14 at each end of the connecting plate 8 are screwed into the inserts 11 and 12, respectively. As a result, each connecting plate 8 was attached tightly to the bottom surface 9 of the receiving groove 6 and the bottom surface 10 of the receiving groove 7, so that the joint strength of the two concrete pipes 1, 1 was increased even though it was a socket type joint. It is sufficiently large so that there is no risk of the joint part shifting or sagging due to the effects of pressure, etc.

Furthermore, since the communication plate 8 is coupled to the receiving groove 6 and the receiving groove 7, and its movement is prevented by the inner wall surface of each receiving groove, displacement of the concrete pipes 1, 1 is also accurately prevented, and the bolt 20
, 21 can be screwed in smoothly, resulting in good workability.

Furthermore, in the first invention, the end surface 5a of the collar portion 5 presses the water stop packing 17, the end surface 4a of the end portion 4 presses the water stop packing 18, and these end surfaces 5a, 4a and the water stop packing 17, 18 is fixed by bolting at least the two upper and lower communication plates 8, 8, the pressing state of these waterproof packings is always kept constant,
Guarantees a given excellent water-stopping effect. Further, in the first invention, as described above, the water stop packing 17 is attached to the end surface 5 of the collar portion 5.
a, the waterproof packing 18 is pressed against the end surface 4 of the end portion 4.
Although it is pressed at point a, it is not pressed at the inner circumferential surface of the socket portion 2 or the outer circumferential surface of the end portion 4, so that the weight of the concrete pipe 1 does not act on the waterproof packings 17 and 18.

Therefore, the water stop packings 17 and 18 are not compressed excessively and lose their elasticity, and a gap is not created in the upper part of the joint, and the good water stop performance of the water stop packings 17 and 18 is maintained for a long period of time. be done. In the second invention, since one of the through holes 13 of the connecting plate 8 is formed as a long hole in the length direction of the concrete pipe 1, even when the bolt 20 is inserted through the through hole 13, the through hole 13 in the length direction of the concrete pipe 1 is formed as a long hole. It is movable, making it possible to easily and accurately fine-tune manufacturing errors and construction errors of the concrete pipe, and easily obtain an appropriate compressed state of the water-stop packings 17 and 18.

- Also, in the second invention, the eccentric seat plate 23
After fully tightening the bolts 20 with the circumferential surface of the connecting plate 8 against the side of the stopper 22, the concrete pipe 1
Since the receding in the length direction is prevented, the joint part cannot shift or sag, and the deterioration of water-stopping performance caused by this is accurately prevented.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the first invention, and FIG.
The figure is a plan view of the concrete pipe, the second figure is the left side view of the concrete pipe, the third figure is the right side view of the concrete pipe, and the fourth figure is the top view of the concrete pipe.
The figure is a perspective view of the connection plate, and FIG. 5 is a longitudinal cross-sectional view of the joint of the concrete pipes. 6 to 8 show an embodiment 0 of the second invention, and FIG.
The figure is a plan view of the joint of concrete pipes, FIG. 7 is a front view of the joint of concrete pipes, and FIG. 8 is a perspective view of a connecting plate and an eccentric seat plate. FIG. 9 is a longitudinal cross-sectional view of a joint portion of a conventional concrete pipe. Evening 1... Concrete pipe, 2... Socket part, 4... End part, 5.
...Flame, 6,7...Receiving groove, 8...
...Connection plate, 9,10...Bottom of receiving groove,
11, 12... insert, 13, 14...
...Through hole, 15...Annular step, 16...
Annular groove, 17, 18... 0... Water stop packing, 20, 21... Bolt, 22... Stopper, 23... Eccentric seat plate. Tsu 1 diagram na Otakaze tough diagram Kei diagram na Yufuga 5 diagrams each diagram Shio 8 Prisoner Tsuji Yushi

Claims (1)

[Scope of Claims] 1. Water stop packing 17, 18 is inserted between two concrete pipes 1, 1, and the connecting plate 8 that is in contact with the concrete pipes 1, 1 is inserted through transparent parts at each end of the connecting plate 8. Hole 13
, 14, which are fastened to concrete pipes 1, 1 by bolts 20, 21 passing through them,
A socket part 2 is formed at one end of the concrete pipe 1, and a collar part 5 is formed at the other end 4 of the concrete pipe 1 by shifting the position from the end surface 4a toward the socket part 2 by an amount equivalent to the depth of the socket part 2. A receiving groove 6 is provided in at least two upper and lower places on the outer circumferential surface of the socket part 2, a receiving groove 7 is provided in at least two upper and lower places on the outer circumferential surface of the collar part 5, and a bottom surface 9 of each receiving groove 6 is provided. An insert 11 into which the bolt 21 is screwed is embedded in the socket, an insert 12 into which the bolt 20 is screwed is embedded in the bottom surface 10 of each receiving groove 7, and an annular stepped portion 15 is formed at the opening edge of the socket portion 2. An annular groove 16 is provided on the inner bottom surface of the socket portion 2, the water stop packing 17 is attached to the annular stepped portion 15, the water stop packing 18 is attached to the annular groove 16, and one of the concrete pipes is Insert the end 4 of 1 into the socket 2 of the other concrete pipe 1,
Each receiving groove 6 of the socket part 2 and the receiving groove 7 of the collar part 5 communicate with each other.
, the connecting plate 8 is brought into close contact with the bottom surface 9 of the receiving groove 6 and the bottom surface 10 of the receiving groove 7, and the bolts 20 and 21 are tightened. The end surface 5a is pressed against the waterproof packing 17, and the end surface 4a of the end portion 4 is pressed.
A joint structure of concrete pipes in which the water stop packing 18 is pressed. 2. Insert waterproof packing 17, 18 between the two concrete pipes 1, 1, and insert the connecting plate 8 attached to the concrete pipes 1, 1 into the through holes 13 at each end of the connecting plate 8.
, 14, which are fastened to concrete pipes 1, 1 by bolts 20, 21 passing through them,
A socket part 2 is formed at one end of the concrete pipe 1, and a collar part 5 is formed at the other end 4 of the concrete pipe 1 by shifting the position from the end surface 4a toward the socket part 2 by an amount corresponding to the depth of the socket part 2. A receiving groove 6 is provided in at least two upper and lower places on the outer circumferential surface of the socket portion 2, a receiving groove 7 is provided in at least two upper and lower places on the outer circumferential surface of the collar portion 5, and a bottom surface 9 of each receiving groove 6 is provided. An insert 9 into which the bolt 21 is screwed is embedded in the bottom surface 10 of each receiving groove 7, an insert 12 into which the bolt 20 is screwed is embedded, and an annular stepped portion 15 is formed at the opening edge of the socket portion 2. An annular groove 16 is provided on the inner bottom surface of the socket portion 2, one of the through holes 13 of the connecting plate 8 is a long hole in the length direction of the concrete pipe 1, and the connecting plate 8 has an annular groove 16 on the inner bottom surface of the through hole 13. Stopper 22 on the part
is provided protrudingly, and the water stop packing 17 is provided on the annular stepped portion 15.
, and the water stop packing 18 is attached to the annular groove 16.
, insert the end 4 of one concrete pipe 1 into the socket part 2 of the other concrete pipe 1, and connect the connecting plate 8 to each receiving groove 6 of the socket part 2 and the receiving groove 7 of the collar part 5, which communicate with each other. and the connecting plate 8 is brought into close contact with the bottom surface 9 of the receiving groove 6 and the bottom surface 10 of the receiving groove 7, and the bolts 20, 2 are fitted together.
1, press the water stop packing 17 with the end surface 5a of the flange 5, press the water stop packing 18 with the end surface 4a of the end 4, and tighten the bolt 2 through the through hole 13.
The circumferential surface of the eccentric seat plate 23 fitted to the stopper 22
A joint structure of concrete pipes in contact with the side of the pipe.