JP3364846B2 - How to attach a waterproof sheet in underground structures - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method of attaching a waterproof sheet for preventing the entry of groundwater or the like on the surface of an underground structure such as a subway, an underpass, a submerged tunnel, a common ditch, an underground parking lot or a basement. Regarding

[0002]

2. Description of the Related Art Conventionally, in order to attach a waterproof sheet to the surface of an underground structure, an adhesive is applied and the waterproof sheet is laid on the adhesive.

[0003]

In the above-mentioned conventional method, the work of applying the adhesive and the work of laying out the waterproof sheet are complicated and time-consuming. Further, there is a problem in that it takes time to cure the adhesive and the work must be interrupted during that time.

In view of the above problems of the conventional method, the present invention is to attach a water blocking sheet to an underground structure that allows the work of attaching the water blocking sheet to be performed simply and quickly. The purpose is to provide a method.

[0005]

According to the present invention, the above problems can be solved as follows. (1) A bag member in which two liquid mixing type quick-drying adhesives are separately housed in adjacent chambers is attached to the bonding layer side of the waterproof sheet by a surface fastener attached to one surface of the bag member, With the perforated plate having a large number of inward sharp projections applied to the other surface of the member, the perforated plate side of the bag member is pressed against the surface of the underground structure together with the waterproof sheet, and the perforated plate is opened. The bag member is ruptured by the projection of the plate to mix and release the quick-drying adhesive.

(2) In the above item (1), a large number of holes are provided in a perforated plate which is applied to the bag member containing the two-component mixed quick-drying adhesive.

(3) In the above item (1) or (2), 2
A perforated plate to be applied to the bag member containing the agent-mixing type quick-drying adhesive is previously attached to the bag member.

(4) In any one of the above items (1) to (3), the bag member containing the two-component mixed quick-drying adhesive is made of a thin synthetic resin film that does not stretch.

(5) In any one of the above items (1) to (4), the binding layer of the cushioning material of the waterproof sheet is a non-woven fabric or a woven fabric.

(6) In any one of the above items (1) to (5), a two-component mixed quick-drying adhesive is used as a hard foaming raw material urethane and a foaming curing agent.

[0011]

According to the present invention, when the waterproof sheet is pressed against the concrete surface of the underground structure, the bag member is broken and the two-component mixing type quick-drying adhesive mixes and diffuses to stop the concrete surface. The water sheet is immediately bonded.

[0012]

1 to 3 show an example of a bag member used in the method of the present invention. The bag member (1) is made of a thin synthetic resin film that does not stretch, for example, a vinyl film (2), and forms concentric chambers (3) and (4). Chamber (3) (4)
Contains a main agent and a curing agent of a two-component mixed quick-drying adhesive separately. Examples of the two-component mixed type quick-drying adhesive include a hard foaming urethane raw material as a main component and a foaming curing agent as a curing agent. However, it goes without saying that not only this but also other ones can be used. Reference numeral (2b) indicates a portion where the synthetic resin film (2) is welded.

A known surface fastener (5) is attached to one surface of the bag member (1). A large number of headed projections (5a) are projected on the outer surface of the surface fastener (5), and these headed projections (2a) should be crimped to the cushioning material of the waterproof sheet described later. Are combined by.

A perforated plate (6) is provided so that it can abut against the surface fastener (5) side, that is, the other surface of the bag member (1).
Is provided. This perforated plate (6) is a plate made of metal or synthetic resin having substantially the same size as the surface of the bag member (1), and has sharp projections (6a) and small holes (6b) on its entire surface. ) And are distributed. As shown, the sharp protrusion (6a) is
It is formed on the surface facing the surface of (1). In the illustrated example, the perforated plate (6) is attached to the welded portion (2b) of the bag member (1), but in some cases, the perforated plate (6) is separated from the bag member (1). There are also things to do. In any case, when the perforated plate (6) is pressed against this surface of the bag member (1), the film (2) is perforated by a large number of sharp projections (6a), and thus the film (2) is perforated. Two of the quick-drying adhesives are extruded through a large number of the holes formed, go out through the small holes (6b), and are mixed with each other in the meantime.

FIG. 4 shows a modification of the bag member (1). In this rectangular variant, the chambers (3) and (4) are formed in a U-shape or comb-teeth shape and arranged in a meshed manner. With such a shape, the extruded 2
The advantage is obtained that the mixing of the agents takes place more homogeneously.

The first embodiment of the method of the present invention using such a bag member (1) will be described in detail with reference to FIGS. 5 and 6. In this example, the method of the present invention is applied to an underground structure (1
This is for attaching the water blocking sheet to the outer wall (10a) of (0).

Water-stop sheet (11) used in the method of the present invention
As shown in FIG. 6, a bonding layer made of a non-woven fabric or a woven fabric that is entangled with the head-like protrusions (5a) of the above-mentioned fastener (5).
(12), a non-water-permeable synthetic resin sheet (13) in which a large number of frustoconical projections (13b) are formed on the outer surface of a flat sheet-shaped base piece (13a), and a synthetic resin net. The material (14) and the buffer layer (15) made of a non-woven fabric are layered and polymerized.

As shown in FIG. 6, first, the water blocking sheet (1
The bag member (1) is dispersed and attached to the appropriate place of 1).
That is, the surface fastener (5) of the bag member (1) is used as a waterproof sheet.
Press on the bonding layer (12) of (11). Then, the surface fastener
The headed projection (5a) of (5) is entwined with the bonding layer (12) of the water blocking sheet, and the bag member (1) is attached to the water blocking sheet (11).

Then, the waterproof sheet (11) having the bag member (1) dispersed and attached in this manner is placed on the outer wall (10a) of the underground structure (10) as shown in FIG. Member (1) is this outer wall
Unfold it so that it faces (10a). FIG. 6 shows an enlarged cross section near the bag member (1) in this state. Bag member after deployment
When a strong pressure is applied from the outside to a certain part of (1) as shown by the white arrow, a large number of sharp projections (6a) of the perforated plate (6) rupture the film (2), resulting in a quick-drying adhesive inside. The two agents of the agent are extruded and mixed with each other, and out of the large number of small holes (6b) and spread on the concrete surface of the outer wall (10a) to form a bag member.
Around the periphery of (1), the water-blocking sheet (11) is impregnated with a bonding layer (12) made of a non-woven fabric or a woven fabric, and the water-blocking sheet (11) and the outer wall (10a) of the underground structure (10) are bonded. . If the adhesive is a hard foaming urethane raw material and a foaming curing agent, the time from this mixing to foaming and curing is about 7-8 seconds. The construction is completed by backfilling the earth and sand (16) on the water blocking sheet (11) thus attached as shown in FIG.

FIG. 7 shows an example in which the method of the present invention is applied to a NATM tunnel. In this case, in the primary concrete layer (10 ') applied to the inside of the tunnel, the waterproof sheet from the inside
Install (11). That is, the bag member is exactly the same as described above.
The water blocking sheet (11) with the (1) attached is pressed against the primary concrete layer (10 ') from inside the tunnel, and a strong pressure is applied to a portion of the bag member (1) as indicated by an outlined arrow. Then, the bag member (1) is ruptured and two quick-drying adhesives come out and mix with each other, and the waterproof sheet (11) becomes the primary concrete layer.
Immediately glued to (10 '). After that, although not shown, a tunnel is completed by placing a secondary concrete layer inside the water blocking sheet (11).

[0021]

EFFECTS OF THE INVENTION The water blocking sheet to which the bag member is attached can be attached to the surface of the underground structure simply and quickly by simply pressing the water blocking sheet from above the portion where the bag member is present.

According to a second aspect of the present invention, a perforated plate to be applied to a bag member containing a two-component mixed quick-drying adhesive,
Providing a large number of holes is not only advantageous for the adhesive to diffuse to the surface of the underground structure, but also increases the chance of mixing the two agents.

According to a third aspect of the present invention, there is provided a perforated plate which is applied to the bag member containing the two-component mixed quick-drying adhesive,
If the bag member is attached to the bag member in advance, only the bag member needs to be attached to the water blocking sheet, which is advantageous because it does not require time and effort.

When the bag member containing the two-component mixed type quick-drying adhesive is made of a thin synthetic resin film that does not stretch, as in the invention described in claim 4, the punching of the film by the punching plate is performed. Easy and advantageous.

When the bonding layer of the water blocking sheet is a non-woven fabric or a woven fabric as in the fifth aspect of the invention, the entanglement with the headed protrusion of the hook and loop fastener is good, and the bag member is in good condition. Can be attached to.

[0026] When the two-component mixed quick-drying adhesive is a hard foaming raw material urethane and a foaming curing agent as in the sixth aspect of the invention, the adhesive foams, and the details spread throughout the details. As the adhesive strength increases, the waterproof sheet can be bonded to the underground structure in a short time.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an example of a bag member used in a method of the present invention.

FIG. 2 is a front view of the bag member shown in FIG.

FIG. 3 is a plan view of the bag member shown in FIG.

FIG. 4 is a plan view of a modified example of the bag member.

FIG. 5 is a conceptual perspective view of an example in which the method of the present invention is applied to the outer wall of an underground structure.

6 is a cross-sectional view showing the vicinity of the bag member of the example shown in FIG. 5 in an enlarged manner.

FIG. 7 is a conceptual sectional view of an example in which the method of the present invention is applied to a NATM tunnel method.

[Explanation of symbols]

(1) Bag material (2) Vinyl film (2a) Protrusion (2b) Welded part (3) (4) Room (5) Face fastener (6) Punching plate (6a) Sharp protrusion (6b) Small hole (10) Underground structure (10a) Outer wall (10 ') Primary concrete layer of NATM tunnel (11) Water stop sheet (12) Coupling layer (13) Non-permeable synthetic resin sheet (13a) Flat sheet-shaped base piece (13b) Conical protrusion (14) Net material (15) Buffer layer (16) Sediment

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E21D 11/38 E02D 31/02 E04B 1/66

Claims (6)

(57) [Claims] 1. A bag member in which two liquids containing a two-component mixed quick-drying adhesive are separately housed in adjacent chambers is attached to a bonding layer side of a water blocking sheet by a surface fastener attached to one surface thereof. In a state where a punching plate having a large number of inward sharp projections is applied to the other surface of the bag member, the punching plate side of the bag member is pressed against the surface of the underground structure together with the waterproof sheet, A method of attaching a waterproof sheet in an underground structure, characterized in that the bag member is ruptured by the projection of the perforated plate to mix and release the quick-drying adhesive. 2. The method for mounting a water blocking sheet in an underground structure according to claim 1, wherein a large number of holes are provided in the perforated plate which is to be applied to the bag member containing the two-component mixed quick-drying adhesive. 3. An attachment of a water blocking sheet in an underground structure according to claim 1, wherein a perforated plate to be applied to the bag member containing the two-component mixed quick-drying adhesive is attached to the bag member in advance. Method. 4. A waterproof sheet for an underground structure according to claim 1, wherein the bag member containing the two-component mixed quick-drying adhesive is made of a thin synthetic resin film that does not stretch. How to install. 5. The method for attaching a waterproof sheet in an underground structure according to claim 1, wherein the bonding layer of the waterproof sheet is a non-woven fabric or a woven fabric. 6. The method for mounting a water blocking sheet in an underground structure according to claim 1, wherein the two-component mixed quick-drying adhesive is a hard foaming raw material urethane and a foaming curing agent.