JPH0781670B2 - Water-stopping method using sheet-like joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention sets a ring shape on the outer peripheral portion of a corrugated pipe joint portion such as a civil drainage pipe and a pipe of an underground pipe for electric power to stop water. The present invention relates to a waterproofing method using a sheet joint.

(Prior Art) As a water-stopping method for a corrugated pipe joint, there are a method using a corrugated straight pipe joint and a method using a sheet-shaped joint.

As a sealing method for straight pipe joints, fill the gap between the ends of the straight pipe joint and the corrugated pipe with sealing tape,
Wrap a self-fusing tape made of vulcanized rubber on it,
Furthermore, there is a method of pressing and winding the end of the self-bonding tape with vinyl tape. However, this construction method requires many working steps, so it takes a long working time, and a small diameter pipe up to 200 mmφ is targeted.

As a method of improving the workability of the sealing method using a straight pipe joint, there is a method of injecting a liquid sealing material from both ends of the straight pipe joint and foaming it. There are difficulties such as the need for adjustment and the difficulty in applying it to large diameter pipes.

(Problems to be solved by the invention) As a water-stopping method for corrugated large-diameter pipes, there is a water-stopping method using a sheet-like joint, and this method is to fill the valley portion of the pipe with a water-stop sealing material, This is a method of winding a packing sheet made of vulcanized rubber, setting a holding plate on the flange portion of the sheet-like joint, then rolling the sheet-like joint and tightening the bolts. This method has a large number of parts, and
Since there are many work processes, there is a problem that the joint material cost is high and the construction cost is high.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a water-stopping method for abutting ends of corrugated pipes with a tensile strength of 100 to 250 Kg.
in the longitudinal direction of the vulcanized rubber molded body 3 in which the strip-shaped projections 2 are integrally molded in parallel to both ends of one surface of the plate-shaped body 1 made of vulcanized rubber having a large thickness in the range of / cm ² and 1 to 10 mm. Connection parts 4A are provided on both side ends, adhesive layers 4B are provided on both side edges of the molded body 3, and a pressure-sensitive adhesive layer 5 is further provided on part or all of the plate-shaped body 1 and the band-shaped projections 2. Is a watertight construction method using a sheet-like joint, characterized in that the watertight pipes 8 are wound around the outer peripheral portion of the abutting portions of the corrugated pipes 8 in a ring shape to be adhesively fixed to stop water.

(Function) The present invention has a tensile strength of 100 to 250 kg / cm ² as a plate-like body, and durability or flexibility against earth pressure when buried by using a vulcanized rubber having a thickness of 1 to 10 mm. By applying the waterproofing method using a sheet-shaped joint with excellent properties, it is possible to maintain high safety against earthquakes, ground subsidence, etc.

Further, in the present invention, by using the strip-shaped projections made of vulcanized rubber of 50 to 95 in Japanese Industrial Standard A type hardness tester, the pipe due to the earthquake, ground subsidence, etc. due to the hook effect between the groove portion of the corrugated pipe and the strip-shaped projections. It is possible to support the movement of the joint portion even when an external force is applied to.

Further, in the present invention, by providing an adhesive layer on a part or the entire surface of the plate-shaped body and the band-shaped projection, a water blocking effect for the spiral groove
It is possible to provide a waterproofing method in which the flat part has an excellent waterproofing effect.

Further, in the present invention, the connection work is easy when the sheet-like joint is wound in a ring shape and set by providing the connection joints at both ends of the vulcanized molded body and the adhesive layers at both side edges of the plate-shaped body. It is possible to construct a construction method with excellent water stopping performance at the joint.

(Example) Next, a configuration of the sheet-like joint of the present invention and an example of an embodiment of a water-stopping construction method using the same will be described.

FIG. 1 and FIG. 2 are perspective views showing a developed sheet-like joint used in the method of the present invention, where 1 has a tensile strength of 100 to 2
It is a plate-like body made of vulcanized rubber having a large thickness of 50 kg / cm ² and a thickness of 1 to 10 mm. In the present invention, the strip-shaped projection body 2 also made of vulcanized rubber is parallel to the end of one surface of the plate-shaped body 1.
Of the vulcanized rubber molded body 3 is integrally formed, flange-shaped connecting portions 4A are connected to both ends of the vulcanized rubber molded body 3 in the longitudinal direction, and adhesive layers 4B are provided on both side edges of the molded body 3. The plate-shaped body 1 and the band-shaped projection body 2 provided with the adhesive layer 5 on a part or the whole of the plate-shaped body 1 are wound around the corrugated pipe 8 in a ring shape to be set and fixed to stop water. It is a thing.

Next, the sheet-like joint will be described step by step.

Preferably as the material of the plate-like member (A) is vulcanized rubber and the like having a tensile strength of ^{_{100Kg / cm 2 ~250Kg / cm 2}} , such as ethylene Propylene Rubber (EPR, EPDM),
Natural rubber (NR), isoprene rubber (IR), acrylonitrile butadiene rubber (NBR), butyl rubber (IIR), halogenated butyl rubber, chloroprene rubber (CR), styrene butadiene rubber (SBR), butadiene rubber (BR), acrylic rubber , Silicone rubber, fluororubber, ethylene acrylic rubber, polyester elastomer, epichlorohydrin rubber, chlorinated polyethylene, ethylene vinyl acetate rubber, general polyurethane rubber, special rubber and thermo-flexible elastomer.

These rubber materials may be used alone or in combination of two or more. Further, these rubber materials include various fillers, tackifiers, lubricants, antioxidants, plasticizers, softeners,
It is also possible to impart tensile strength, durability and watertightness according to the purpose by mixing a general compounding material such as a low molecular weight polymer and oil with a rubber material.

In particular, in order to maintain the desired performance for a long period of time, add appropriate stabilizers such as anti-aging agent, polymerization inhibitor and scorch inhibitor to the above rubber material, hydrogenate the polymer itself, and perform other modification. Therefore, it is extremely effective to achieve stabilization.

For example, when integrally molding the plate-shaped body 1 and the band-shaped projection body 2, a method of molding the same material is advantageous.
The different materials may be vulcanized and integrally molded, or the adhesive may be integrally molded.

Examples of the strip-shaped protrusion 2 of the present invention include vulcanized rubber and thermoplastic elastomer having the above-mentioned physical properties, but the following substances having the above-mentioned properties can also be used.

For example polystyrene, polyethylene, polypropylene, A
Thermoplastics such as BS, polyvinyl chloride, poly (methyl methacrylate) polycarbonate, polyacetal, nylon, chlorinated polyether, polytetrafluorene, acetyl cellulose, ethyl cellulose, etc., and fillers and plasticizers for these plastics as required. , Softeners, tackifiers, oligomers, lubricants and the like.

The thickness of the plate-like body 1 is preferably 1 mm to 10 mm, and if it is 1 mm or less, the tensile strength becomes insufficient and the joint part may be fractured when stressed. If it is 10 mm or more, the weight becomes large and the workability deteriorates. That is, when considering the durability, impact resistance, and workability of the joint portion, 1 to 10 mm is preferable.

The strip-shaped projection 2 is constructed in accordance with the depth and width of the corrugated (grooved) pipe, and has a width of 18 mm to 160 mm and a height of 9 mm to 115 mm.
It is preferable that the size is 1 mm to 3 mm smaller than the size of the groove.

It is economically preferable that the connection portion (joint portion) 4A or the adhesive layer portion 4B is integrally formed with the plate-shaped body 1 and the strip-shaped projection body 2 by the same material, but further, metal, plastic, fiber or the like is compounded. It may have a further reinforcing effect. The connecting portion (joint portion) 4A is L-shaped as shown in FIG. 17, and the reinforcing plate can be provided on a part or the entire surface of the connecting portion (joint portion) 4A.

The adhesive layer portion 4B is provided with a viscous adhesive layer corresponding to the back surface of the plate-shaped body 1 and is bonded to the other surface of the plate-shaped body 1 to form a ring-shaped joint. An acrylate-based adhesive or pressure-sensitive adhesive or a ribbon-shaped regular sealing material can be provided.

Furthermore, after winding the joint in a ring shape, metal such as iron, galvanized steel, stainless steel, polyethylene, polypropylene, natural rubber, ethylene propylene rubber, styrene butadiene rubber, etc. It may be reinforced by winding around both ends or the entire surface.

Next, the present invention will be described in more detail with reference to Examples. Example 1 The following compounding materials were kneaded with an open roll and sheeted to a thickness of 3 mm with an open roll, and vulcanization molded at 150 ° C for 30 minutes using a press mold.

This sheet-like joint was used as a test body for each test.

Example 2 Using the compounded material used in Example 1, a sheet-like joint having a plate-like body with a thickness of 1 mm was prepared by the same molding method as this, and used as a test body for each test.

Example 3 With the compounding material used in Example 1, a sheet-like joint having a plate-shaped body having a thickness of 10 mm was prepared by the same molding method as this, and used as a test body for each test.

Example 4 The following compounded material was vulcanized and molded in the same manner as in Example 1.
This sheet-like joint was used as a test body for each test.

Example 5 The following compounded material was vulcanized and molded in the same manner as in Example 1.
This sheet-like joint was used as a test body for each test.

Example 6 A sheet-like joint in which the strip-shaped projections were made smaller by 3 mm than the groove portion was prepared by the same molding method as in Example 1 using the compounding material, and used as a test body for each test.

Example 7 The plate-like body portion was vulcanized and molded in the same manner as in Example 1 by using the compounded material of Example 1 and the strip-shaped protrusions with the following compounded material. This sheet-like joint was used as a test body for each test.

Example 8 The plate-like body portion is the compounded material of Example 1 and the band-like protrusion body portion is the example 4.
Vulcanization molding was performed in the same manner as in Example 1 using the compounded material of No. 1. This sheet-like joint was used as a test body for each test.

Comparative Example 1 A plate-shaped body portion was vulcanized and molded in the same manner as in Example 1 by using the compounded material of Example 1 and the band-shaped projection body portion using the following compounded material. This sheet-like joint was used as a test body for each test.

Comparative Example 2 The plate-shaped body portion was vulcanized and molded in the same manner as in Example 1 by using the compounded material of Example 1 and the strip-shaped protruding body portion using the following compounded material. This sheet-like joint was used as a test body for each test.

Comparative Example 3 A sheet-like joint in which the band-shaped projections were formed 0.5 mm smaller than the size of the groove by the same molding method using the compounded material used in Example 1 was molded into test samples for each test.

Comparative Example 4 A sheet-like joint in which the band-shaped projection was formed 4 mm smaller than the size of the groove by the same forming method using the compounded material used in Example 1 was formed into a test body for each test.

Comparative Example 5 A sheet-like joint was prepared by the same molding method using the compounded material of Comparative Example 2 for the plate-shaped body portion and the compounded material used in Example 1 for the strip-shaped protrusion portion, and a test body for each test. And

Comparative Example 6 A sheet-like joint was prepared by the same molding method using the compounded material of the strip-shaped projections used in Comparative Example 1 for the plate-shaped body and the compounded material used in Example 1 for the strip-shaped projections. The test body was used for each test.

Comparative Example 7 A sheet-like joint having a plate-like body having a thickness of 12 mm was prepared by the same molding method using the compounded material used in Example 1, and used as a test body for each test.

Comparative Example 8 A sheet-like joint having a plate-like body having a thickness of 12 mm was prepared by the same molding method using the compounded material used in Example 1, and used as a test body for each test.

Test method 1. Tensile strength A sample was punched out with a dumbbell No. 3 type of JIS K6301 to prepare a test piece, and the tensile strength was obtained.

2. Hardness The hardness was determined with a spring hardness meter A type described in JIS K6301.

3. Impact resistance Each test piece was made by sticking a sample to a steel plate, and the impact diameter, drop distance, and load were changed using a DuPont impact tester, and the state of occurrence of ponholes was tested. Pinholes are detected by the 12000V Holiday Detector.

Measurement conditions Strike diameter 3mmφ Drop distance 40cm Load 1000g Temperature 25 ° C ○: No pinhole generation ×: Pinhole generation Watertightness 330mmφ outer diameter corrugated pipe 8 with sheet-like joint 3 of the present invention as shown in FIG. 21. It was confirmed whether there was water leakage when the water column was wrapped around 50 mmH and left standing for 24 hours.

◯: No water leakage ×: Water leakage occurred 5. Workability The workability when the sheet-like joint of the present invention was wound around a corrugated pipe having an outer diameter of 300 mmφ was confirmed.

6. Durability A water leakage test similar to the water tightness test of 4 was performed after 100 times of 10 mm repeated expansion and contraction tests of both ends of the test body for confirming water tightness.

Therefore, the present invention, when the tensile strength of the plate-shaped body is less than 100 Kg / cm ² , it is difficult to ensure the water-stopping effect when used as a ring-shaped joint, and when external stress due to subsidence of the ground is applied, the embedded pipe Is not strong enough, and it is easy to break if shock is applied during burying. When the tensile strength exceeds 250 Kg / cm ² , when dynamic stress is continuously applied after being buried in the ground, deterioration occurs and the joint material is likely to be broken. If the thickness is less than 1 mm, there will be a problem with impact resistance during embedding and it will easily break,
When the thickness is 10 mm or more, when the joint of the present invention is wound around a corrugated grooved pipe, workability deteriorates from a heavy point and a hard point, and material cost increases, which is not economical.

If the hardness of the strip-shaped protrusions is 50 or less, the hook effect between the joints cannot be secured, and the water blocking effect cannot be maintained when stress is applied to the joints. When the hardness is 95 or more, 2m for the protruding shape
Although it is designed to be small, variations in the dimensions of the groove occur, and when the groove is small, when wound around the joint, a gap between the plate-shaped body and the pipe easily occurs, which easily causes water leakage. The shape of the band-shaped projection is preferably smaller than the groove by 1 to 3 mm. If it is less than 1 mm, it is difficult to absorb the dimensional variation of the grooved pipe, and problems are likely to occur in terms of workability and watertightness. Further, the method of providing the strip-shaped projections on the entire surface of the pipe groove, the method of providing two strips at both ends, and the method of providing the strip-shaped projections in a three-point block shape were all good. If it is larger than 3 mm, when the adhesive layer is laminated, the hook effect of the strip-shaped protrusion is not sufficient, and the thickness of the adhesive layer needs to be made hot to secure watertightness, resulting in poor workability and cost increase. It is not preferable because it leads to.

The joint method of the joint portion can be either an L-shaped joint by integral molding or an adhesive joint method. However, in order to prevent a gap between the pipe and the joint portion at both the joint portion and the adhesive portion, a fixed shape is formed in this gap portion. Further water-tightness can be secured by pressing with a sealing material, the plate-like body portion of the sheet-like joint used in the present invention, a sponge sheet or the like.

Therefore, the present invention is a plate-shaped body, a strip-shaped projection body, a connection portion (joint portion)
Alternatively, it is a water-stopping method using a sheet joint that consists of an adhesive part and further has a plate-shaped or band-shaped projection with an adhesive layer provided on part or all of the surface of the tube-shaped joint to set it in a ring shape to stop water. , 75mm ~ 1000mmφ small diameter pipes to large diameter pipes are durable and have water-tightness that follows the movement of pipes, lightweight, excellent workability, inexpensive and economical. is there.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention,
The strip-shaped projections are provided on both ends of the plate-shaped body, and the adhesive material layer is further provided on a part of the plate-shaped body and the strip-shaped projections. FIG. 2 is a perspective view of an embodiment of the present invention,
Protrusions are provided at both ends of the plate-like body, and an adhesive layer is further provided on part of the plate-like body and the band-like protrusions. 3 to 16 are sectional views showing the configuration of an embodiment of the present invention, and FIG. 3 shows a plate-shaped body provided with band-shaped projections on the entire surface. FIG. 4 is a sectional view of the configuration of the other surface of FIG. FIG. 5 shows a plate-shaped body provided with band-shaped projections only at both ends thereof. In FIG. 6, a strip-shaped projection is provided on the entire surface of the plate-shaped body, and an adhesive layer is further provided on a part of the strip-shaped projection. FIG. 7 is a sectional view of the configuration of the other surface of FIG. FIG. 8 shows that a strip-shaped projection is provided on the entire surface of the plate-shaped body, and an adhesive layer is further provided on the entire surface of the strip-shaped projection. 9 and 10 show that a strip-shaped protrusion is provided at the center of the plate-like body,
Further, an adhesive layer is provided. FIG. 11 shows a plate-shaped body provided with strip-shaped projections on its entire surface, and an adhesive layer provided on both ends of the strip-shaped projections and a part of the plate-shaped body. FIG. 12 shows the thickness of the plate-shaped strip thickened at both ends. 13 and 14 are cross-sectional views of the configuration of FIG. While FIGS. 1 to 13 described above are provided with connecting portions at both ends of the plate-like body, FIGS. 15 and 16 are configurations in which an adhesive layer is provided at one end of the plate-like body. FIG. FIG. 17 shows a sheet-like joint composed of connecting portions set in a ring shape. FIG. 18 is another cross-sectional view of FIG. FIG. 19 shows a sheet-like joint in which an adhesive layer is provided on one end of a plate-like body, which is set in a ring shape. FIG. 20 is another cross-sectional view of FIG. 19, which is fixed by the band at both ends of the joint. FIG. 21 is a cross-sectional view showing the test method of the water tightness test of the present invention. FIG. 22 is a perspective view in which the sheet-like joint of the present invention is set in a ring shape on the outer peripheral portion of the joint portion of the pipe body. DESCRIPTION OF SYMBOLS 1 ... Plate-shaped body, 2 ... Band-shaped projection body 3 ... Vulcanized rubber molded body, 4A ... Connection part (joint part) 4B ... Adhesive layer, 5 ... Adhesive material layer 6 ... Band, 7 ... Caulking material 8 ... Corrugated pipe , 9 ... Water 10 ... Sheet joint

Claims (1)

[Claims] 1. One of plate-like bodies 1 made of vulcanized rubber having a large tensile strength in the range of 100 to 250 kg / cm ^{2 and} a thickness of 1 to 10 mm in a water stop construction method for abutting ends of corrugated pipes. Of the vulcanized rubber molded body 3 in which the strip-shaped protrusions 2 are integrally molded in parallel to both ends of the surface of the molded body 3 are provided with connection portions 4A at both longitudinal ends thereof, and adhesive layers 4B are provided at both side edges of the molded body 3. Provided, and the plate-shaped body 1
In addition, the adhesive layer 5 provided on a part or the whole surface of the strip-shaped projection 2 is wound around the outer peripheral portion of the abutting portion of the corrugated pipes 8 and 8 in a ring shape to be adhesively fixed to stop the water. A water-stopping method with a characteristic sheet-like joint.