JPH06117194A - Method and device for connecting watertight sheet - Google Patents

Abstract

PURPOSE:To improve the watertightness of watertight sheets when they are deformed, by a method wherein cavities are formed between a male member for engaging and a female member to be engaged, with which members the edges of the watertight sheets neighboring with each other are connected, and after these members are press-fitted, the cavities are pressure-filled with a viscous sealing compound. CONSTITUTION:A male member 4 for engaging is fastened to one edge for connecting a watertight sheet and a female member 5 to be engaged is fastened to the other edge. Both of the members 4, 5 are press-fitted and the watertight sheets are connected with each other. A recess line 4f is longitudinally formed on the top end part of the male member 4 and the members 4, 5 are formed so that cavities C can be formed between them when they are press-fitted. After the members 4, 5 are press-fitted, the cavities C are pressure-filled with a viscous sealing compound 8. Furthermore, the male member 4 may be press- fitted to the female member 5 after the female member 5 is previously coated with the sealing compound 8. In this way, even if the watertight sheets are deformed, watertightness can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet joining method and a joining apparatus used for tunnel construction or waterproofing of concrete structures.

[0002]

2. Description of the Related Art For example, in tunnel construction, in order to prevent the underground spring water from invading from the side of the primary concrete sprayed on the inner surface of the tunnel to the side of the secondary concrete placed on the inner surface of the tunnel, the secondary concrete It is known that a water-proof sheet is stretched on the surface of the primary concrete before placing.

Since the length of the waterproof sheet is finite, the side edges of the waterproof sheet must be stretched while being watertightly connected to each other as the tunnel is advanced. As a sub-coupling means for watertightly coupling the side edges of such a water blocking sheet, for example, a coupling device including a male engagement member (4) and a female engagement member (5) shown in FIG. There is (A).

In FIG. 4, (1) is a flexible waterproof sheet made of plastic, and the front and back surfaces excluding the side edge portions thereof have a concave portion (2) and a convex portion along a direction intersecting with each other. Department
(3) and (3) are continuously provided so as to be located close to each other.

At one side edge of the water blocking sheet (1), two pairs of large and small elastic tongues extending from both the tip and the middle of the plate-shaped head (4a) toward both sides are formed. A male engagement member (4) including pieces (4b) (4c) is provided.

The male type engaging member (4) has a bifurcated branch at the base end of the head (4a), and one piece of the connecting piece (4d) is one side edge of the waterproof sheet (1). The other piece is a knob piece (4e) used when fitting the male engagement member (4) to the female engagement member (5).

The other side edge of the water blocking sheet (1) has a non-recessed area larger than the one side edge, and that portion is a nail stopper.
(6), and the female engaging member (5) is attached to the base of the nailing piece (6).
Is provided.

The female engaging member (5) has a substantially trapezoidal cross section, and the head portion (4a) of the male engaging member (4) is fitted in the center of the base of the trapezoid. Aperture (5
a) The fitting part (5b) provided with the base of this fitting part (5b)
It is composed of a connecting piece (5c) and a knob piece (5d) which are bifurcated from (the upper side of the trapezoid).

The connecting piece (5c) is fixed to the base of the nail stopping piece (6) in the water blocking sheet (1), and the knob piece (5d) performs the same function as the knob piece (4e).

In order to use this waterproof sheet (1) for tunnel construction, the nail stopper (7) is used to drive the nail stopper piece (6) onto the primary sprayed concrete (not shown) to stop the waterproof sheet (1).
Next, the male engaging member of the water blocking sheet (1) to be stretched next
(4) is pressed into the female engagement member (5), and then the nail piece (6) on the opposite side is nailed, and the waterproof sheet is sequentially installed.
Stretch (1).

The male type engaging member (4) is replaced with the female type engaging member (5).
2 pairs of large and small elastic tongues (4c) (4d) are pressed against the inner surface (5f) of the fitting part (5b) of the female engaging member (5) to form a pair of close contact parts. (B) is formed so that water does not leak from the joint portion of the water blocking sheet (1).

[0012]

Even if the above-mentioned conventional water-stop sheet connecting device (A) maintains sufficient water-tightness, a part of the connecting device (A) is a protrusion of primary sprayed concrete. Part, or the head of an anchor bolt (not shown) or other protrusions, a part of both engaging members (4) and (5) is deformed to form a gap in the close contact part (B). I'm worried that spring water will invade from there.

SUMMARY OF THE INVENTION In view of the above problems of the prior art, it is an object of the present invention to provide a water-stop sheet joining method and a joining apparatus thereof, which have further improved sealability.

[0014]

In order to achieve the above object, the joining method of the present invention is a headed male type provided on one of opposite side edges of two water blocking sheets adjacent to each other. In a water-stop sheet joining method of joining both water-stop sheets in a watertight manner by press-fitting the engagement member to a female-type engagement member provided on the other side edge, the both engagement members are press-fitted to each other. After doing
The viscous sealing material is press-fitted into the space formed between the inner surface of the female engaging member and the head of the male engaging member from the ends of both engaging members.

Further, in the coupling device of the present invention, a headed male engaging member provided on one of the opposing side edges of two water blocking sheets adjacent to each other and the other of the opposing side edges. A female engaging member that is provided and engages with the male engaging member, and a space formed between the head of the male engaging member and the inner surface of the female engaging member. It is characterized in that it is provided with a viscous sealing material provided in the plant.

[0016]

In a space formed between the inner surface of the female engaging member and the head of the male engaging member, the female engaging member and the male engaging member are press-fitted to each other. By press-fitting the viscous sealant into the water-tight sheet, the watertightness of the water-stop sheet coupling device is further improved compared to the conventional one, and the watertightness is maintained even if any of the engaging members is deformed. can do.

[0017]

Embodiments of the present invention will now be described with reference to FIGS. FIG. 1 shows a cross-sectional view of a water blocking sheet (1) of the present invention before fitting of a coupling device (A ′). The same members as those shown in the conventional example are designated by the same reference numerals,
Detailed description is omitted.

At the top of the head portion (4a) of the male type engaging member (4) continuously provided on one side edge of the water blocking sheet (1), there is a recessed line (4f) for filling the viscous sealing material. It is formed along the longitudinal direction (direction orthogonal to the stretched surface in FIGS. 1 and 2).

The two pairs of elastic tongues (4b) (4c) provided on the head (4a) are slightly thicker than the conventional ones.

When the male engagement member (4) is fitted on the inner surface (5f) of the female engagement member (5), the engagement member (2) of the engagement member (4) is
A pair of elastic tongues (4b) and (4c) interposed between the elastic tongues (4b) near the tip of the head (4a) are pressed to further improve watertightness. A tongue (5e) is formed.

The opening (5) of the fitting portion (5b) of the female engaging member (5)
In the vicinity of a), the male and female type engaging members are bent more toward the back of the inner surface (5f) than the conventional one and are slightly inclined.
(4) (5) After press fitting, the elastic tongue (4c) engages with this inclined portion so that the male engaging member (4) is more reliably prevented from coming off.

Connecting device (A ') for the water blocking sheet (1) described above
In order to connect the two, the male engagement member (4) is press-fitted onto the female engagement member (5) as indicated by the arrow in FIG.

Then, as shown in FIG. 2, the distal ends of the elastic tongues (4b) (4c) of the male engaging member (4) and the inner surface (5f) of the female engaging member (5). To form a close contact portion (B), and further the tip of the elastic tongue (5e) provided on the inner surface (5f) of the female engagement member (5) and the head of the male engagement member (4). With (4a), another pair of close contact parts (B ') is formed, and the sealing property is secured.

Thereafter, the male and female engagement members in the press-fitted state
(4) Butyl rubber (8), which is a viscous sealing material, is press-fitted toward the inside of the concave line (4f) opening at the end of (5).

Then, a space (C) formed by the inner surface (5f) of the female engagement member (5) and the head portion (4a) of the male engagement member (4) shown in FIG. Butyl rubber (8) is filled in the groove (4f), so that the watertightness of the female and male engagement members (4) and (5) is further increased, and there is a risk of water leakage from the coupling device (A). Disappear.

A female engaging member corresponding to the space (C)
Even if butyl rubber (8) is adhered to the inner surface (5f) of (5) in advance and then the female and male engaging members (4) and (5) are press-fitted to each other and joined together. Produces the effect of.

The number of elastic tongues (4b) (4c) (5e) is not limited to this embodiment. The point is that they may be provided so as to engage with each other.

Further, both the engaging members (4) and (5) may be of female or male type, and their shape, size, material and the like can be appropriately changed.

[0029]

According to the present invention, the viscous sealing material is interposed in the space formed between the inner surface of the female type engaging member and the head of the male type engaging member, so that they are joined together. The watertightness of the device is further enhanced as compared with the conventional one, and the watertightness can be maintained even if any of the engaging members is deformed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a water blocking sheet coupling device of the present invention before fitting.

FIG. 2 is a sectional view similarly after fitting.

FIG. 3 is a cross-sectional view showing a state in which a viscous sealing material is press-fitted after the same fitting.

FIG. 4 is a cross-sectional view showing a conventional water blocking sheet and a connecting device therefor.

[Explanation of symbols]

(1) Water stop sheet (2) Recessed portion (3) Convex portion (4) Male type engagement member (4a) Head portion (4b) (4c) Elastic tongue piece (4d) Connecting piece (4e) Knob piece (4f ) Head (5) Female engaging member (5a) Opening (5b) Fitting part (5c) Connecting piece (5d) Knob piece (5f) Inner surface (6) Nail stopper (7) Stop nail (8) Butyl rubber
(Viscous sealing material) (A) (A ') Coupling device (B) (B') Close contact part (C) Vacancy

Claims (5)

[Claims] 1. A head-shaped male engaging member provided on one of opposite side edges of two water blocking sheets adjacent to each other is replaced with a female engaging member provided on the other side edge. In a water-stop sheet connecting method for press-fitting both water-stop sheets, the both engaging members are press-fitted to each other, and then the inner surface of the female engagement member and the male engagement member A method for connecting a water blocking sheet, characterized in that a viscous sealing material is press-fitted into the space formed between the head portion and the end portions of both engaging members. 2. A head-shaped male engaging member provided on one of opposite side edges of two adjacent water blocking sheets is replaced with a female engaging member provided on the other side edge. In the method of joining the water blocking sheets, in which both water blocking sheets are water-tightly joined by press fitting, a viscous sealing material is preliminarily adhered to the inner surface of the female engagement member, and then both engagement members are pressed against each other. A method of joining water-stop sheets, which is characterized by fitting. 3. The method of joining water blocking sheets according to claim 1, wherein the viscous sealing material is butyl rubber. 4. A head-shaped male engaging member provided on one of opposite side edges of two water blocking sheets adjacent to each other, and the male die provided on the other opposite side edge. Female engaging member that engages with the engaging member, and a viscous seal provided in a space formed between the head of the male engaging member and the inner surface of the female engaging member. And a water blocking sheet coupling device. 5. The waterproof sheet coupling device according to claim 4, wherein the male engaging member is provided with a recess for filling the adhesive sealing material at the tip of the head.