JPH06221096A - Cut-off packing - Google Patents

Abstract

PURPOSE:To facilitate work of fitting a packing in a groove by embedding an antireleasing material in both sides of the packing such that the extended inside surface crosses the direction of withdrawing the packing within a predetermined angle. CONSTITUTION:Cut-off lips are provided in both sides of a cut-off packing 1 of rubber, synthetic resin or the like fitted in a groove formed in a concrete structure and facing the opposed wall surfaces of the groove. Then, an antireleasing material 5 thrusts a part thereof from the side surface 6 and the extended inside surfaces of the packing 1 fitted in the groove crosses each other at an angle smaller than 180 deg.C at the packing extracting side. Also, the voids 7, 8 deforming the packing 1 when the packing 1 is fitted in the groove are formed in the packing 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof packing suitable for use in a groove formed in a wall of a tunnel or the like for draining water leaking from the wall of a concrete structure, particularly a railway tunnel. Regarding

[0002]

2. Description of the Related Art As a countermeasure against water leaking from the wall of a railway tunnel or the like, there is a method in which groundwater on the ground side is extracted in advance inside the tunnel and drained to the gutter of the tunnel. In this method, a groove is formed in the circumferential direction of the tunnel wall, several water guiding holes are bored in the groove, and the groove is closed from the inside of the tunnel with a trough packing having a U-shaped cross section. A water conduit is formed inside, and the groundwater flowing out from the water conduit is made to flow into the tunnel gutter via the water conduit.

As this U-shaped packing, for example, as shown in Japanese Utility Model Publication No. 57-37775, a U-shaped packing made of rubber, synthetic resin or the like is fitted in a groove, and then an adhesive such as an epoxy resin is applied to the packing tunnel. It is known that the lower end portions on both sides exposed inside and the lower end portion of the wall surface facing the groove are provided by coking.

As another U-shaped packing, without using an adhesive, a U-shaped packing made of rubber, synthetic resin or the like is strongly compressed and inserted into the groove, and the compression pressure is applied between the opposing wall surfaces of the groove. It is known that the packing is fixedly held.

[0005]

However, in the packing in which the adhesive is applied by caulking to the lower end portions on both sides exposed in the tunnel of the packing and the lower end portion of the wall surface of the groove as described above, it takes time to cure the epoxy resin. In addition, when water flows out to the wall surface of the groove, it is difficult to apply the adhesive, and there is a drawback that the worker's hands become dirty. Further, since the adhesive can be caulked only on the surface of the packing exposed in the tunnel, the packing is only partially adhered to the groove wall surface, which results in a weak adhesion.

A packing of a type in which the packing is compressed and inserted into the groove without using an adhesive and the packing is fixed by the compression pressure requires a great deal of labor to compress and insert the packing, which is very difficult. If the packing is formed so as to reduce the compression force of the packing to make the work easier, the packing can be easily inserted into the groove, but when the wall surface of the groove is wet with water, it is 1 kg / cm. There is a drawback that the packing easily comes out of the groove even with a relatively small back pressure of ² or less.

The present invention has been made in order to solve the problems of the above-mentioned conventional water-stop packings, and it is easy and easy to construct, does not stain hands, and adheres an adhesive. An object of the present invention is to provide a water blocking packing that is free from the risk of the packing coming out of the groove due to a defect and the packing coming out of the groove due to back pressure when the wall surface of the groove is wet.

[0008]

[Means for Solving the Problems] A waterproof packing according to the present invention for achieving the above object is a waterproof packing made of rubber, synthetic resin or the like fitted in a groove formed in a concrete structure. Water blocking lips are formed on both sides of the packing facing the opposite wall surface of the groove, and the inside extension surface of the retaining material is smaller than 180 ° on the side in the direction of the packing removal when the packing is fitted in the groove. It is characterized in that a part of the packing is protruded from the side surface of the packing so as to intersect with each other at an angle and is embedded.

In addition to the above structure, the waterproof packing of the present invention is characterized in that a void is formed in the packing that causes deformation of the packing when the packing is fitted into the groove.

[0010]

[Function] By embedding the retaining material on both sides of the packing so that the inner extended surfaces thereof intersect at an angle smaller than 180 ° on the side where the packing comes out, this angle is increased when back pressure is applied to the packing. Since the packing is deformed as described above, the tip of the retaining material is hard to fit into the wall of the concrete structure, and the retaining resistance increases.

In addition to this structure, a space is formed in the packing that causes deformation of the packing when the packing is fitted into the groove, so that when the packing is pushed into the groove, the space is formed by the packing. As it is crushed and elastically deformed, the work of fitting the packing into the groove becomes easy.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show one embodiment of a water blocking packing of the present invention. FIG. 1 is a perspective view showing a part of a long packing by cutting it, FIG. 2 is a sectional view thereof, and FIG. It is a figure which shows the state which fitted this packing in the groove | channel of the concrete structure.

The waterproof packing 1 is made of rubber or synthetic resin, and is made of a long member having a generally rectangular cross-section whose upper surface is recessed in an arc shape. Three lips of an upper lip 2, a central lip 3 and a lower lip 4 are formed on both sides of the packing 1 facing the facing wall surfaces 10a, 10a of the groove 10 (FIG. 3). The upper lip 2 is longer than other lips, and the tip thereof is formed thin, and the self-pressure effect by the back pressure (atmospheric pressure and water pressure) P applied to the upper surface 1a after the packing 1 is fitted in the groove 10 It is designed to have.

The central lip 3 is formed as a triangular waterproof line so as to have a waterproof effect by a compression reaction force generated when it is pressed against the wall surface 10a of the groove 10.

The lower lip 4 provides continuity between the packing 1 and the end surface 11a of the concrete structure 11, and therefore has the effect of filling the gap between the lower ends of both sides of the packing 11 and the concrete structure 11 when compressed. It is formed to have a shape.

On both sides of the packing 1 between the lip 3 and the lip 4, a retaining material 5 made of a stainless plate is embedded over the entire length of the packing 1 so that a part of the retaining material 5 projects from the side surface 6 of the packing 1. ing. Retaining material 5
As shown in FIG. 2, the inner extension surfaces are arranged in a “C” shape so that the inner extension surfaces intersect at an angle θ smaller than 180 ° on the side in the direction in which the packing 1 is removed.

A circular space 7 is formed in the lower center of the packing 1 over the entire length of the packing 1, and the circular space 7 is open to the outside by a space 8 below it.

When the water blocking packing 1 having the above structure is used by fitting it into the groove 10 of the concrete structure 11, first, the upper lip 2 of the packing 1 is bent inward and inserted into the groove 10. Next, the lower lip 4 is bent inward, and the packing 1 is deformed so that the cavities 7 and 8 in the lower center of the packing are crushed and reduced, and a light impact is applied from below to form the groove 10
Press in.

The packing 1 fitted in the groove 10 in this way
0 indicates that the seals 2, 3 and 4 are opposite wall surfaces 10a of the groove 10,
Sealing is performed by pressing it against 10a.

The packing 1 has a back pressure P on its upper surface 1a.
However, since the packing 1 is deformed so that the angle θ at which the extended surface of the retaining member 5 intersects is increased, the tip of the retaining member 5 is pushed into the concrete structure 11 from the wall surface 10a. The removal resistance of the packing 1 increases, and the packing 1 can be prevented from coming off the groove 10.

[0021]

[Modification] In the above embodiments, a stainless plate is used as the retaining material 5, but the retaining material 5 is not limited to this, and for example, an iron plate, a hard plate, a steel cord, or a steel wire is woven into a mesh shape. Rigidity, etc., which has an appropriate elasticity and can be slightly elastically deformed when the packing 1 is inserted into the groove 10, and is hard to be inserted into the concrete structure 11 when the packing 1 is deformed by the back pressure P. Any material having

Further, in the above embodiment, the retaining member 5
Are arranged in a “C” shape so that the angle θ is smaller than 180 ° before the packing 1 is fitted into the groove 10. However, the arrangement method of the retaining member 5 is not limited to this. Before inserting 1 into the groove 10, the angle θ is 180
Even if it is not smaller than 0 °, it is sufficient if θ is smaller than 180 ° when the packing 1 is fitted in the groove 10.

In the above embodiment, the retaining member 5 is formed of an iron plate which is continuous in the longitudinal direction of the packing 1. However, not limited to this, a discontinuous iron plate or rod may be embedded at a predetermined interval. Good.

The shapes of the cavities 7 and 8 formed in the center of the lower part of the packing are not limited to those in the above embodiment, and various modifications can be made. Further, it is not limited to the vacant space opened to the outside as in the above-described embodiment, but may be a vacant space closed to the outside.

[0025]

As described above, according to the present invention, the retaining member is embedded on both sides of the packing so that the inner extended surfaces thereof intersect at an angle smaller than 180 ° on the side in the direction of the packing removal. Thus, when the back pressure is applied to the packing, the packing is deformed so that this angle becomes large, so that the tip of the retaining material is pushed into the wall of the concrete structure, and the removal resistance increases. Therefore, even if the wall surface of the groove is wet, there is no fear that the packing will come off from the groove due to the back pressure. As a result, the compression force of the packing may be relatively small, so that the packing can be easily fitted into the groove with a relatively small force.

Further, since no adhesive such as epoxy resin is used, there is no risk of soiling the hands and there is no need to worry about defective adhesion of the adhesive.

In addition to the above structure, by forming a space in the packing that causes deformation of the packing when the packing is fitted in the groove, the packing is pushed into the groove when it is pushed into the groove. Since the part is elastically deformed by crushing the place, the work of fitting the packing into the groove becomes easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a water blocking packing of the present invention.

FIG. 2 is a sectional view of a packing of the same embodiment.

FIG. 3 is a view showing a state in which the packing of the embodiment is fitted in the groove of the concrete structure.

[Explanation of symbols]

 1 Seal for water stop 2, 3, 4 Seal 5 Preventive material 7, 8 Vacancy

Claims (2)

[Claims] 1. A water-stop packing made of rubber, synthetic resin, or the like that is fitted into a groove formed in a concrete structure, wherein water-stop lips are formed on both sides of the packing facing wall surfaces facing the groove. In addition, in the state where the packing is fitted in the groove, the retaining member is made to protrude from the side surface of the packing so that the inner extension surfaces thereof intersect at an angle smaller than 180 ° on the side in the direction in which the packing comes off. A waterproof packing characterized by being buried. 2. The water blocking packing according to claim 1, wherein a space is formed in the packing that causes deformation of the packing when the packing is fitted in the groove.