JPS6011999Y2 - Waterproof sheet for civil engineering and construction - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproof sheet that is developed and buried between the ground and the concrete lining in order to prevent water dripping inside a tunnel due to, for example, underground water gushing out.

It is also used on the concrete lining of existing tunnels, on roads and slopes of residential areas, and on the walls of basements.

This type of waterproof sheet is made of synthetic resin such as polyethylene or vinyl chloride, and can be either a simple flat sheet or at least one with many parallel ribs on the side that contacts the surface to which it is spread when buried. There is.

The latter waterproof sheet with parallel ribs has the ribs oriented vertically, so that the grooves between the ribs become water-flowing grooves, and the spring water caught by the sheet is quickly guided to the side gutter by following the grooves. do.

In addition, the ribs serve as reinforcement for the sheet and have the advantage that the thickness of the sheet can be reduced, so it is widely used.

The above-mentioned waterproof sheet with parallel ribs is spread on the surface to be spread, for example, directly on the ground of a tunnel, or on the ground reinforced with shotcrete, and then fixed by driving pins at appropriate intervals from above or using anchor bolts. ing.

However, since a stopper such as a pin or anchor bolt passes through the water passage groove, water seeps out from around the stopper.

Therefore, a seal washer is used to prevent water leakage, but a washer with a complete sealing function is extremely expensive.

The purpose of this proposal is to provide a sheet that can prevent water from leaking around the stopper in the above-mentioned parallel ribbed waterproof sheet without using an expensive complete seal washer, as shown in Figure 1. A large number of parallel ribs 3 are provided on the surface of the waterproof sheet 1 that is in contact with the surface to be applied 2 (shown in FIGS. 3 and 4).
At the same time, seat stopper penetration seats 4 are protruded at appropriate intervals, and a portion 51 (shown in the second figure) of the water passage groove 5 between the parallel ribs 3 and 3 that hangs over the stopper penetration seat 4 is connected to the seat 4. The gist is that the route was detoured along the surrounding area.

6 is a welding overlap without ribs.

Although the means for forming the detour water groove 51 is arbitrary, it is simple and preferable to form the rib 31 that intersects with the stopper penetration seat 4 by removing it before and after the seat 4, as shown in FIG. .

Note that one rib 32 intersects approximately at the center of the stopper penetration seat 4.
If there is, the rib 32 may be continuous with the seat 4.

The waterproof sheet 1 of this invention is stretched so that its ribs 3 are in contact with the ground or other surface 2 to be spread as shown in FIG. It is something to stop.

When fastening with an anchor bolt, drill a hole from above the pin penetrating hole 4.

The water flowing along the groove 5 near the stopper penetration point hits the peripheral wall of the stopper penetration seat 4, turns along the peripheral wall toward the detour water passage groove 51, and is led to the side gutter. , water will not reach the through hole of the stopper P.

Therefore, the washer W used when driving pins or tightening anchor bolts may be simply a rubber plate, or an ordinary washer may be sufficient in places where there is little spring water, and is effective as an improvement to the waterproof sheet.

In addition, reinforcing bars, protective nets, electric wires, and other various items may be attached to the waterproof sheet 1 with anchor fittings, but if the anchor fittings are fixed by passing through the sheet stopper penetration seat 4, This will prevent water from leaking from that area.

[Brief explanation of drawings]

Figure 1 is a front view of the proposed tarpaulin sheet, Figure 2 is an enlarged front view of the vicinity of the stopper penetration seat, Figure 3 is a cross-sectional view taken along the line 3-3 in Figure 2, and Figure 4 is the state in which the pin is driven in. FIG. 2 is a cross-sectional view taken along line 4-4 of FIG. 1 is a waterproof sheet, 2 is a ground, 3, 31, 32 are ribs, 4
5 is a water passage groove, 51 is a detour water groove, P is a stopper, and W is a washer.

Claims (1)

[Scope of utility model registration request] A large number of parallel ribs and a sheet stopper penetration seat are provided protrudingly on the surface in contact with the surface to which the sheet is spread, and the portion of the water passage formed between the parallel ribs that hangs over the stopper penetration seat is A waterproof sheet for civil engineering and construction that runs around the perimeter of the seat.