JPS63679B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is used for water/sewage systems, underground passages, public ditches, tunnels, sunken boxes, etc., and has at least two pipes internally divided by a back split wall extending in the axial direction of the pipe. This invention relates to a flexible joint for an underdrain.

In culverts such as sewers, it is sometimes necessary to repair or clean the inside of the culvert. In this case, it is desirable to stop the flow of sewage in the underdrain pipe for cleaning, in order to improve the speed of cleaning.
In order to satisfy this demand, by providing a back wall extending in the axial direction of the culvert, at least two pipes are formed within the culvert, separated by the back wall, and only one of the pipes is normally connected. It is conceivable to use a conduit to drain wastewater, and when repairing or cleaning this conduit, use the other conduit to drain the wastewater. Alternatively, it is conceivable that at least two pipes are formed by partitioning the pipes with a back wall, and that rainwater, sewage, gray water, etc. are allowed to flow separately. By the way, the connection of the culvert having such a structure has conventionally been performed in the following manner. That is, as shown in Figure 7,
If there are two pipes divided by the back wall X, first install a joint _L1 along the end face of the culvert peripheral wall Z and the back wall X so as to surround the end face of one pipe _Y1. Then, the pair of underdrains are connected by arranging a joint L ₂ along the end faces of the peripheral wall Z and the back wall X so as to surround the end face of the other pipe Y ₂ .

However, in the conventional example described above, the joints L ₁ , L ₂
Since external pressure acts on the joints L ₁ , L ₂ are provided independently from each other, so
The number of joints required corresponds to the number of conduits, and the construction of the joints is complex, making the work time-consuming.

The object of the present invention is to provide a flexible joint for underdrains having such back walls, in which the underdrains are connected by a load-bearing member that is movable within a certain range, and the outer periphery is flexible. It is characterized by being watertightly covered with a water-stopping member, and watertightly covered with an inner circumferential flexible water-stopping member along the inner circumferential surface of the conduit divided by the back wall. .

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 and 1' are cylindrical underdrains, and segments 1a and 1'a made of steel segments, concrete segments, RC segments, etc. are assembled, and concrete 1b and 1'b are poured as a secondary winding on the inner peripheral surface. It was formed by setting the Moreover, the underdrains 1, 1' are provided with back walls A (see FIGS. 1, 2, and 6) and A' (see FIG. 6) extending in the direction of the tube axis. Note that the back walls A and A' divide the inside of the culverts 1 and 1' into sections B and C, each having a roughly semicircular cross section (see Figures 1 and 2).
(See Figure 6). 2 is an underdrain joint of the present invention that connects the underdrains 1 and 1'.

As shown in FIGS. 4 and 5, the underdrain joint 2 has anchoring members 3, 3' fixed to mutually opposing surfaces of the peripheral walls of the pair of underdrains 1, 1', respectively. The anchoring members 3, 3' include casing parts 3a, 3a' extending in the circumferential direction along the peripheral edge of the underdrains 1, 1';
Underdrain 1 with holes corresponding to pipes B and C,
It consists of disk-shaped end plates 3b and 3'b formed in a shape along the end surface of 1'. In Figure 3, D,
D' is the back split part of 3b and 3'b. Furthermore, stepped cylindrical portions E and F are provided on the side of the end plate 3b opposite to the end plate 3'b, and extend in the circumferential direction along the inner peripheral surfaces of the conduits B and C. Cylindrical parts E, F
Flange portions G and H are integrally provided at the end portions (see Fig. 6). Further, the end plate 3'b is also provided with similar cylindrical portions E', F' and flange portions G', H'. I, I' are anchor bolts integrated with end plates 3b, 3'b, and are embedded in concrete 1b, 1'b.

In FIGS. 4 and 5, 3c and 3'c are mutually opposing side walls of the housing portions 3a and 3'a, 3d,
3'd is a side wall opposite to the mutually opposing side walls of the housing parts 3a, 3'a, and 3e, 3'e are, for example, the underdrain 1,
1' between the side walls 3c and 3d or between 3'c and 3'd.
These are vertical ribs that regulate the spacing between and prevent deformation. Note that the vertical ribs 3e, 3'e are arranged at appropriate intervals in the circumferential direction.

3 to 5, 4, 4' are the side walls 3
Spaces 5 and 5' formed between c and 3d or between 3'c and 3'd are holes for inserting load-bearing members, which are bored in the side walls 3c and 3'c. Reference numeral 6 denotes a load-bearing member disposed between the anchoring members 3 and 3'. In the figure, load-bearing member 6
Although only one load-bearing member 6 is shown, in reality, a plurality of the same load-bearing members 6 are arranged annularly at equal pitches in the circumferential direction along the anchoring members 3, 3'.

This load-bearing member 6 has both ends screwed together with a bolt 7 inserted into the spaces 4 and 4' of the casing parts 3a and 3'a through the ends 5 and 5', respectively, and the both ends of the bolt 7. It consists of nuts 8 and 8'. In addition,
The nuts 8, 8' are formed larger than the holes 5, 5' to prevent both ends of the bolt 7 from slipping out of the holes 5, 5'. In this way, the load-bearing member 6
The two end portions of the two anchoring members 3, 3' are permanently inserted into the spaces 4, 4', and connect the anchoring members 3, 3' so that they can be relatively approached and separated within a certain range.

On the outside of this annular row of load-bearing members 6, first and second outer circumferential flexible water-stopping members 9 and 10 formed in short cylindrical shapes from rubber, synthetic resin, etc. are arranged coaxially with the annular row of load-bearing members 6. It is arranged. Furthermore, third and fourth tubes formed in a short cylindrical shape from the same material as the outer circumferential flexible water stop members 9 and 10 are arranged inside the annular row of the load-bearing members 6 and along the inner circumferential surfaces of the conduits B and C. Inner circumference flexible water stop member 11,1
2 are arranged. This inner circumferential flexible water stop member 1
The cross-sectional shapes of 1 and 12 are approximately U-shaped.

Both ends of the above-mentioned outer circumference flexible water stop members 9 and 10 are respectively attached to the housing parts 3a and 3'a in a watertight manner, and the inner circumference flexible water stop members 1
Both ends of 1 and 12 are cylindrical parts E of end plates 3b and 3'b,
It is fixed watertightly to E' or F, F' respectively. These maintain watertightness between the anchoring members 3 and 3'. In the figure, reference numeral 13 denotes a skin plate disposed across the outer peripheral surfaces of the anchoring members 3, 3', and both ends of the skin plate are welded and fixed to the anchoring members 3, 3'.

Next, the operation of the underdrain joint 2 having such a configuration will be explained.

A culvert 1 connected using such a culvert joint 2,
1' is usually used by being buried in the ground.

Due to uneven subsidence of this ground, culvert 1,
If a large relative displacement force acts in the direction away from the skin plate 1', and the skin plate 13 breaks midway or one or both ends of the skin plate separates from the anchoring members 3, 3', the anchoring member 3 becomes culvert. culvert 1' integrally with 1
and separates relative to the anchoring member 3'. This separation is limited within a certain range by the force-bearing member 6.

On the other hand, the outer circumference flexible water stop members 9, 10 and the inner circumference flexible water stop members 11, 12 are stretched, and despite the relative separation of the underdrains 1, 1',
Watertightness is maintained, and a water stop is maintained between the inside and outside at the connection part of the underdrains 1 and 1' and between the pipes B and C.

In the embodiment described above, the joint 2 of the underdrain is connected to the segments 1a, 1'a and the secondary wrapped concrete 1.
Although an example in which the joint 2 of the underdrain is applied to the underdrains 1 and 1 made of the materials b and 1'b is shown, the joint 2 of the underdrain is not limited thereto, and can be applied to underdrains made of other materials. For example, the underdrain joint 2 may be applied to an underdrain made solely of steel or concrete. Moreover, the circumferential shape of the underdrains 1, 1' may be circular, oval, quadrangular, or polygonal in cross-section, and the underdrains 1, 1' may be an integral part. However, the structure may be constructed by assembling divided members. Besides, culvert 1,1'
The number of back dividing walls A, A' may be two or more. These points are basically the same for the joint 2 of the underdrain.

Furthermore, the flexible water stop members 9, 10, 11, 12,
It is possible to use bellows-like, straight, and other various cross-sectional shapes. Moreover, the assembly and burying of such underdrains 1, 1' and culvert joints 2,
Any of the following methods may be used: open cut method, shield method, and push method.

Furthermore, in the embodiment described above, the cylindrical parts E and F with flanges G and H are integrally formed on the end plate 3b, and the cylindrical parts with flange parts G' and H' are formed on the end plate 3'b. E' and F' are integrally formed, and the inner circumferential flexible water stop member 1
Although the ends of 1 and 12 are fixed to the cylindrical parts E, E' or F, F', the invention is not necessarily limited to this. That is, the inner circumferential flexible water stop member 11,
12 may be directly fixed to the end plates 3b, 3'b,
A separately formed cylindrical body is fixed to the end plates 3b, 3'b, and the inner circumference flexible water stop member 1 is attached to this cylindrical body.
The ends of 1 and 12 may be fixed. Further, in the embodiment, a plurality of rod-shaped members arranged in an annular manner as the load-bearing member 6 is shown, but the present invention is not necessarily limited to this. The anchoring members 3, 3' can take various forms, such as those connected to the anchor members 3, 3', and those in which annular bodies are movably connected to each other.
The two ends of the underdrain are connected movably within a certain range and cannot be separated, and the relative displacement between the underdrains 1 and 1' is restricted within a certain range, and the outer circumferential flexible water stop member is prevented from expanding inwardly due to external pressure. Anything that can prevent this is fine.

Since the present invention is constructed as described above, when repairing or cleaning one of at least two pipes and flowing fluid using the other pipe,
This prevents fluid from leaking from one pipe to the other, and also prevents relative displacement between connected pipes due to expansion and contraction of the pipes due to ground subsidence, earthquakes, and temperature changes. Even if the load-bearing member and the outer circumferential flexible water-stopping member are used to withstand external pressure and maintain watertightness, and the connections between each pipe are also watertightly isolated by the inner circumferential flexible water-stopping member, the external In addition to preventing the intrusion of earth, sand, water, etc. from the pipes, it also has the effect of reliably preventing fluid from leaking from one pipe line to the other pipe line.

In addition, since the outer circumference flexible water stop member is provided on the outer periphery of the inner circumference flexible water stop member, external pressure does not act on the inner circumference flexible water stop member, so that the structure of the inner circumference flexible water stop member is This makes it possible to simplify the process and speed up the work of connecting culverts.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which the flexible joint of the present invention and an underdrain are connected. FIG. 2 is a front view of the culvert shown in FIG. 1. FIG. 3 is a partially cutaway perspective view showing the flexible joint shown in FIG. 1 and a portion of its surroundings.
FIG. 4 is a sectional view taken along the line -- in FIG. Figure 5 shows
A cross-sectional view taken along the line -- in FIG. FIG. 6 is a sectional view taken along the line -- in FIG. 2. FIG. 7 is a schematic diagram showing a conventional underdrain joint. 1, 1... Culvert, A, A'... Separate wall, B, C
... Pipe line, 2 ... Underdrain joint, 3, 3' ... Anchoring member, 6 ... Load-bearing member, 9, 10 ... Outer circumference flexible water stop member, 11, 12 ... Inner circumference flexible stop Water parts.

Claims (1)

[Claims] 1. Anchoring members are respectively fixed to opposing end surfaces of the peripheral walls of a pair of culverts having a peripheral wall and a back dividing wall that partitions a space surrounded by the peripheral wall to form at least two pipelines, and Both ends of a load-bearing member are movably connected within a certain range and cannot be detached from both anchoring members, and the load-bearing member is disposed between the two anchoring members on the outside of the load-bearing member, and both ends of the load-bearing member are connected to the both anchoring members. Opposed end surfaces of the peripheral wall and the back split wall are connected watertightly by a fixed short cylindrical flexible outer water stop member, and are disposed inside the load-bearing member and surround each of the pipes. A number of end plates corresponding to the number of pipes are fixed to the pipe, and a short cylindrical inner flexible water stop member is disposed between the end plates to connect the two end plates in a watertight manner. A culvert joint with a back split wall.