JPH053600Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a fixing structure for a waterproof sheet that is suitably used for tunnel construction.More specifically, when fixing members such as nails are driven in,
The present invention relates to a waterproof sheet that can prevent water leakage from the implanted portion.

Conventional technology Traditionally, when installing a waterproof sheet in a tunnel, fixing members such as concrete nails or bolts are driven into the waterproof sheet in order to fix the waterproof sheet to the ground or primary lining concrete. However, in this case, in order to prevent water leakage at the driving location, a fixing member driving member is used. Various types of fixing member driving members have been proposed in the past; for example, one in which a heat-fusible material is filled in a frame proposed by the present applicant is known (Jikkosho et al. 60-30485). This fixing member driving member can be used by melting the heat-fusible material in the frame after driving the fixing member, or by separately supplying a melted heat-fusible material to drive the fixing member. This is to fill the gap that has arisen.

Problems to be solved by the invention However, when the fixing member driving member as described above is attached to a flat waterproof sheet, the back side of the driving member comes into close contact with the waterproof sheet, resulting in a good water leakage proofing effect. However, if the waterproof sheet is not flat, water may leak from the place where the fixing member is inserted.

That is, as shown in FIGS. 4 to 8, for example, a large number of protrusions 1 or chevron-shaped protrusions 2 having an inverted U-shaped cross section and protruding toward one side at a predetermined distance from each other are formed along one direction. As a result, the water-impermeable sheet 4 in which the protrusions 3 protruding toward the other side are formed between the protrusions 1 or the chevron-shaped protrusions 2 has one side facing the ground or the primary lining concrete side, A fixing member such as a nail is driven into the sheet from the other side, and since this water-impermeable sheet 4 has a large number of protrusions 1 or chevron-shaped protrusions 2 formed on one side, there is no passage between these (troughs). The water channel 5 has excellent drainage function, and these protrusions 1 and chevron-shaped protrusions 2 have an inverted U cross section.
Since it is formed in a letter shape, it has elasticity and is therefore suitable for use as a waterproof sheet. When a driving member, such as the one described in Japanese Utility Model Publication No. 60-30485, is installed as shown in Figure 5 or Figures 7 and 8 (6 is a fixing member, 7 is a frame) 8 is a washer body, 9 is a heat-fusible material, and 10 is an adhesive layer), and after driving the fixing member 11, the heat-fusible material 10 in the frame 7 is melted or a separate Even if it were possible to prevent water leakage from inside the frame 7 by supplying a molten heat-fusible substance to fill the gaps in the frame 7, the driving member 6 would not fit into the valleys between the protrusions 3. 12 is not in close contact with the water-impermeable sheet 4, spring water from the ground or the primary lining concrete side that has been transmitted through the peripheral wall 11a of the fixing member 11 flows into the valley 12, and this water continues to flow into the valley 12. There is a problem with water flowing inside and leaking.

The present invention was made to improve the above-mentioned situation, and provides a waterproof sheet fixing structure in which a fixing member driving member is attached to the other side of the water-impermeable sheet having chevron-shaped protrusions on one side without fear of water leakage. The purpose is to provide.

Means for Solving the Problems In order to achieve the above-mentioned purpose, this invention is installed between the earth of a tunnel or between the primary lining concrete and the secondary lining concrete, so that spring water from the earth can be used as a secondary lining. In a structure in which a waterproof sheet is fixed to the ground or primary lining concrete to prevent water from leaking into the lining concrete side, multiple intersecting butts are used in which the fixing member is placed in close contact with the other side of the impermeable sheet. The above-mentioned surface of the waterproof sheet, in which ridges are formed and chevron-shaped protrusions are formed on one surface of the impermeable sheet corresponding to the recesses surrounded by these intersecting ridges, is placed facing the ground or primary lining concrete. At the same time, the bottom wall of the frame body of the fixing member driving member, which holds the fixing member in a watertight state by a heat-fusible substance filled in the frame body, is brought into close contact with the cross protrusion formed on the other surface. The water that penetrates the waterproof sheet and flows into the concave part of the impermeable sheet corresponding to the waterproof sheet penetration part of the fixing member cast into the ground or primary lining concrete is To provide a fixing structure for a waterproof sheet, characterized in that it is configured to block water from flowing into a recessed part.

Effect According to the present invention, a plurality of intersecting protrusions are formed on the other surface of the water-impermeable sheet to which the above-mentioned fixing member driving member is attached, and the other surface is provided with a heat-sealed adhesive filled in the frame. A fixing member that holds the fixing member in a watertight state with a water-tight substance. A fixing member that is cast into the ground or primary lining concrete by penetrating the waterproof sheet and in close contact with the bottom wall of the frame of the casting member. Since the water that has flowed into the recess of the water-impermeable sheet corresponding to the waterproof sheet penetration part is blocked from flowing to other recesses by the intersecting ridges, the fixing member can be inserted through the driving member. When the fixing member is driven in, even if spring water that has been transmitted along the peripheral wall of the fixing member leaks into the recess between the intersecting ridges, even if this leakage is blocked by the walls of the crisscrossing ridges, it will not leak any further into other parts. Therefore, water leakage in the water-impermeable sheet having chevron-shaped protrusions on one side is prevented.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

Embodiment Fig. 1 is a back view of a waterproof sheet for tunnel construction according to an embodiment of the present invention, Fig. 3 is a partially cutaway perspective view thereof, and Fig. 2 is a sectional view thereof. Reference numeral 13 is composed of a water-impermeable sheet 4, and a plurality of intersecting protrusions 3a, 3b are formed on one surface (the other surface) of this water-impermeable sheet 4. Moreover, on one side of this water-impermeable sheet 4,
As shown in FIG. 2, a large number of chevron-shaped protrusions 1 are formed corresponding to the troughs 5.

When using this waterproof sheet 13, it is stretched with one side facing the ground or the primary lining concrete side, and fixed to the end surfaces of the intersecting ridges 3a and 3b on the other side as shown in Fig. 2. A component driving member 6 is attached, and a fixing member 11 such as a nail or bolt is driven through the driving member 6 to fix the waterproof sheet 13 to the ground or primary lining concrete. In this case, by driving the fixing member 11, spring water from the ground or the primary lining concrete side leaks to the other side of the waterproof sheet 13 through the peripheral wall 11a of the fixing member 11, and leaks between the intersecting ridges 3a and 3b. Water leaks into the recess 14, but this leakage is caused by the intersecting ridge 3.
It is blocked by the walls a and 3b and does not flow into other intersecting ridges, and no further leakage occurs between the driving member 6 and the waterproof sheet 13 (water-impermeable sheet 4). It is something. Therefore, as shown in Figure 2,
- Fixing member driving member 6 as shown in Publication No. 30485
When using, melt the heat-fusible material 9 in the frame 7 or separately supply the melted heat-fusible material,
By filling the gap created when the fixing member 11 is cast, water leakage in the recess 14 will not enter the casting member 6, and water leakage from the ground or the primary lining concrete side will not occur. Definitely prevented.

The material for forming the water-impermeable sheet 4 constituting the waterproof sheet 13 as described above is a synthetic resin sheet such as polyvinyl chloride, low-density polyethylene, high-density polyethylene, or ethylene-vinyl acetate copolymer. Heat-adhesive synthetic resins such as ethylene resins such as ethylene resins, polypropylene, propylene resins such as ethylene-polypropylene, or synthetic resin films such as polyester and polycarbonate can be used, but considering that the waterproof sheets can be easily bonded to each other. In this case, it is preferable to use a thermoadhesive resin. There is no particular limit to the thickness of the water-impermeable sheet, but in order to maintain the strength to withstand the pressure during concrete pouring,
In particular, it is preferably about 0.4 to 3 mm.

Furthermore, the intersecting protrusions formed on one side of this sheet have a height of about 2 to 10 mm and a width of about 1 to 5 mm,
Forms 50 to 500 lines per 1m, intersecting angle is 20°
It is fine as long as it is perpendicular to the point, but from an aesthetic point of view,
Preferably, they are orthogonal.

Furthermore, the waterproof sheet of the present invention can also be formed as a composite sheet in which a nonwoven fabric or the like is laminated on one side of the water-impermeable sheet 4 as described above.

Furthermore, as the fixing member driving member, Fig. 2,
Actual public works as shown in Figures 4, 7, and 8.
The one described in Publication No. 30485 can be used (in this case, the frame 7 is made of hard rubber,
It is preferable to form the adhesive layer 10 with a soft adhesive such as asphalt rubber), but as the member for driving the fixing member, the fixing member is made watertight with a heat-fusible substance filled in the frame. It may be anything that can be retained, and is not limited to this.

Furthermore, other configurations of the present invention can be variously modified within the scope of the gist of the present invention.

Effects of the invention As described above, according to the waterproof sheet fixing structure of the present invention, a waterproof sheet equipped with an impermeable sheet having chevron-shaped protrusions on one side is attached to the ground or primary lining concrete using a fixing member. When the fixing member is fixed, spring water from the ground flows along the peripheral wall of the fixing member and enters into the recess of the cross protrusion corresponding to the driving part of the fixing member,
Even if water leaks, the water does not advance any further and is localized within the recess, so that water leakage is effectively prevented.

[Brief explanation of the drawing]

Fig. 1 is a schematic back view showing a waterproof sheet used in an embodiment of the present invention, and Fig. 2 is a cross section of an embodiment of the present invention with a fixing member driving member attached along the lines shown in Fig. 1. Figure 3 is a partially cutaway perspective view taken along the line in Figure 1, Figure 4 is a plan view showing an example of a waterproof sheet as a comparative example, and Figure 5 is a partially cutaway perspective view taken along the line in Figure 4. 6 is a plan view showing another example of the waterproof sheet shown as a comparative example, and FIG. 7 is a sectional view of the fixing member driving member installed along the line shown in FIG. 6. FIG. 8 is a sectional view taken along the line of FIG. 6 and shows the fixing member attached. 1... protrusion, 2... chevron-shaped protrusion, 3... protrusion,
3a, 3b...Cross protrusion, 4...Waterproof sheet, 5...Trough (channel), 6...Fixing member driving member, 11...Fixing member, 13...Waterproof sheet, 14 ...Concavity.

Claims (1)

[Scope of utility model registration request] A waterproof sheet is placed between the ground or primary lining concrete of a tunnel and the secondary lining concrete to prevent spring water from leaking from the ground into the secondary lining concrete. In a structure that is fixed to concrete lining, a plurality of intersecting ridges are formed on the other side of the water-impermeable sheet to which the fixing member is placed, and a plurality of intersecting ridges are formed on the other side of the water-impermeable sheet, and a plurality of intersecting ridges are formed on the other side of the water-impermeable sheet. One side of the waterproof sheet with chevron-shaped protrusions formed on one side of the impermeable sheet is placed facing the ground or primary lining concrete, and the intersecting ridges formed on the other side are filled into the frame. A fixing member that holds the fixing member in a watertight state with a heat-adhesive substance is placed in close contact with the bottom wall of the frame of the casting member, penetrates the waterproof sheet, and is cast into the ground or primary lining concrete. A waterproof sheet characterized in that the water flowing into the concave portion of the water-impermeable sheet corresponding to the waterproof sheet penetration portion of the fixing member is blocked from flowing to other concave portions by the intersecting ridges. fixed structure.