KR100769664B1 - Water leakage prevention structure between waterproof sheets for tunnel - Google Patents

Abstract

A water leakage prevention structure is provided to enhance the adhesion between a water blocking plate and the waterproof sheet by attaching the sub-waterproof sheet to the water standing plate using a stapler and thermally bonding the water blocking plate to the waterproof sheet. A water leakage prevention structure for a tunnel comprises a waterproof layer. The waterproof layer is obtained by fixedly installing a non-woven fabric on a shotcrete surface(70), and then fixedly installing a waterproof sheet(20) on the non-woven fabric. A water blocking plate(30) is overlapped on the waterproof sheet and one end portion of a sub-waterproof sheet(40) is fixed to a rim portion of the water blocking plate by a stapler. The sub-waterproof sheet is thermally bonded to the waterproof plate. A dual-side rubber tape is interposed between the water blocking plate and the sub-waterproof sheet.

Description

Water Leakage Prevention Structure between Waterproof Sheets for Tunnel}

1 is a view showing a conventional tunnel waterproof structure,

2 is a cross-sectional view showing a leak prevention structure according to a first embodiment of the present invention;

3 is a perspective view showing an auxiliary waterproof sheet attached to the index plate of FIG.

4 is a cross-sectional view showing a leak prevention structure according to a second embodiment of the present invention;

5 is a cross-sectional view showing a leak prevention structure according to a third embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: nonwoven fabric 20: waterproof sheet

30: index plate 40: auxiliary waterproof sheet

50: iron core 60: rubber tape

70: shotcrete 80: lining concrete
80a: boundary line

90: excavation surface

The present invention relates to a leakproof structure of the waterproof sheet for the tunnel and the lining concrete, and more particularly, to prevent water leakage between the boundary between the waterproof sheet forming the waterproof layer of the tunnel and the lining concrete layer formed on the waterproof sheet. It relates to a waterproof sheet for tunnels and a lining concrete layer that can be attached to the waterproof sheet by attaching the index plate.
A tunnel is a tunnel with a substantial internal cross section formed by drilling holes in a mountain, underground, or cutlery for the purpose of transportation, water transportation, etc. In recent years, the construction of urban tunnels that penetrate underground spaces of the city has been increasing as the construction of subways has increased in order to distribute road traffic on the ground.

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As a method for constructing such a tunnel, a ground is used to construct a sphere with concrete, or a method using blasting is mainly used.

The blasting method is suitable when the ground is mainly composed of rock, and a NATM (New Austrian Tunneling Method) method has been developed that utilizes the characteristics of the rock.

Referring to Figure 1 attached to the outline of the construction of the tunnel by the NATM method, first, the excavation using the excavation equipment to the construction site of the tunnel, if there is a rock, etc. if the blasting operation by the gunpowder loading Form a basic tunnel through.

Since the excavation surface 1 of the foundation tunnel formed as described above is extremely curved and not suitable for undertaking subsequent waterproofing work, shotcrete 2 is used to stabilize the excavation surface 1 of the foundation tunnel and smooth the waterproof ground surface. Spraying) and then the waterproof layer (3) to prevent the infiltration of groundwater flowing into the foundation tunnel, and then it is also called lining concrete, or concrete lining, which is a concrete reinforcement wall that protects the tunnel inner wall. 4 ') by pouring.

The waterproof layer 3 is formed by fixing the nonwoven fabric 3a on the shotcrete 2 pouring surface and laminating the separate waterproof sheet 3b on the nonwoven fabric 3a. It flows downward along the nonwoven fabric 3a and is discharged through the drain pipe 5 installed in parallel with the tunnel.

At this time, the non-woven fabric 3a is fixedly installed on the upper surface of the shotcrete 2, and the nail 6 is fixed at a predetermined interval on the nonwoven fabric 3a to fix the nonwoven fabric 3a.

At this time, in order to fix the waterproof sheet (3b) to be installed on the upper portion of the nonwoven fabric (3a), the nails (6) are inserted and installed together with the Landel (7) of the same material as the waterproof sheet, and the upper portion of the nonwoven fabric (3a) The water-resistant layer 3 is formed by stacking the impermeable separate waterproof sheet 3b and thermally bonding it to the landel 7.

In addition, an integral waterproof sheet (not shown) in which a nonwoven fabric is integrally installed may be fixed to an upper portion of the shotcrete surface using a randel and heat-bonded to the randel 7 to form a waterproofing layer.

On the other hand, the waterproof sheet (3b) is limited in size in order to facilitate the manufacture, transport and construction, so that a plurality of waterproof sheets (3b) to the front and rear, left and right over the entire tunnel to waterproof the entire tunnel non-woven fabric (3a) Stacked on top.

At this time, the concrete lining (4, 4 ') layer is formed on the surface of the waterproof sheet (3b), because the concrete lining (4, 4') is constructed by a predetermined width boundary line (4a) is formed on the concrete lining layer, In order to prevent leakage through the boundary line 4a, a water plate 8 is installed on the waterproof sheet 3b and a concrete lining layer 4, 4 'is enacted. Therefore, water leaking out to the boundary line 4a side is blocked on the way through the complicated cross-sectional shape of the index plate 8.

Here, the waterproof sheet (3b) is an ECB (Ethylene Copolymer Bitumen) sheet or VE (Very Low Density Polyethylene) + EVA (Ethylene Vinyl Acetate mixed) sheet having excellent water resistance, and the index plate (8) is a PVC (Polyvinyl Chloride) Index plates are used.

The ECB or VE material is excellent in waterproofness, but it is expensive and difficult to form a complicated structure, so it is suitable for the molding of a simple form such as the waterproof sheet 3b, and the PVC material is poor in waterproofness, and is inexpensive and can be molded in a complicated structure. Therefore, it is suitable for forming a complicated shape such as the index plate 8 such that a plurality of wings 8a protrude upward.

However, the ECB or VE material and the PVC material have fundamentally different chemical properties, so that they cannot be attached by heat fusion or adhesion, so that the waterproof plate 8 can be used as a lumber, a hardware, a double-sided tape, a bond, a hardware, etc. As a temporary measure, temporary fixation or temporary attachment to the waterproof sheet 3b has been carried out, and after the temporary attachment, the lining concrete 4 has been poured, but in the meantime, the mounting plate on the waterproof sheet 3b is not firm. ) Was not able to withstand its weight and easily fell off, or when the index plate 8 floated from the waterproof sheet 3b, the concrete flowed into the back of the excited index plate 8 when the concrete lining was poured.

The present invention has been made in order to solve the above problems, by attaching an auxiliary waterproof sheet of the same material as the waterproof sheet to both sides of the index plate with the iron core of the stapler to the waterproof sheet and the auxiliary waterproof sheet in the state that the index plate on the surface of the waterproof sheet; The purpose of the present invention is to provide a leakproof structure of a waterproof sheet for tunnels and a lining concrete layer that can efficiently attach waterproof sheets and index plates having different chemical properties by thermal bonding.

Leak-proof structure of the waterproof sheet and lining concrete layer for the tunnel according to an embodiment of the present invention for achieving the above object, the nonwoven fabric and the waterproof sheet is fixed to the shotcrete surface of the foundation tunnel is formed a waterproof layer, the waterproof layer In the tunnel waterproof structure is to install the lining concrete after placing the lining concrete on the waterproof sheet at the boundary line position formed when pouring the lining concrete;

After installing the cover plate to the waterproof sheet, the one end portion of the auxiliary waterproof sheet of the same material as the waterproof sheet is connected to be laminated along the edge of the water plate with a staple core to be laminated, and then the auxiliary waterproof sheet to the waterproof sheet It is characterized in that to be adhered to by heat fusion.
Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

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Figure 2 is a cross-sectional view showing a leak-proof structure according to a first embodiment of the present invention, Figure 3 is a perspective view showing an auxiliary waterproof sheet attached to the index plate of FIG.

The nonwoven fabric 10a is fixedly installed on the shotcrete 70 spraying surface sprayed on the excavation surface 90 of the foundation tunnel, and the separate waterproof sheet 20a is laminated on the nonwoven fabric 10a, or the nonwoven fabric 10b is integrally formed. The formed integral waterproof sheet 20b is fixedly installed on the shotcrete 70 pouring surface.

Hereinafter, the separate waterproof sheet 20a and the integrated waterproof sheet 20b are collectively referred to as the waterproof sheet 20, and the shotcrete 70 direction is referred to as the bottom, and the lining concrete 80 direction is referred to as the upper part for better understanding of the specification. .

In order to prevent water from leaking into the gap between adjacent waterproof sheets 20 or the boundary line 80a between adjacent lining concretes 80 and 80, the lining concrete to be constructed later or between adjacent waterproof sheets 20 ( The water plate 30 is padded on the waterproof sheet 20 on the boundary line 80a of the 80 and 80.
At this time, along the edges of both bottom surfaces (meaning the surface in contact with the waterproof sheet) of the index plate 30 to position and laminated the auxiliary waterproof sheet 40 cut the same material as the waterproof sheet 20 to a size of 5 ~ 30mm The auxiliary waterproof sheet 40 is attached to both bottom surfaces of the index plate 30 by using a stapler so as to face the laminated portion from the auxiliary waterproof sheet 40 to the index plate 30.

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Since the core of the conventional industrial stapler has already been determined, the shape of the iron core is temporarily fixed in the case of penetrating the two materials with the iron core by applying air pressure, but the end of the penetrated iron core is not bent, so that the core core in the process of winding or conveying the index plate 30 may be ) Is released.

However, in the present invention, after cutting to meet the standard using an amorphous iron core 50, the core core 50 through the auxiliary waterproof sheet 40 and the index plate 30 laminated the iron core 50 using a stapler end of the iron core 50 There is no fear that the iron core 50 may be dislodged by the addition of the inner side or the outer side.

The auxiliary waterproof sheet 40 is made of the same material as the waterproof sheet 20, and is preferably ECB (Ethylene Copolymer Bitumen) or VE (VLDPE (Very Low Density Polyethylene) + EVA (Ethylene Vinyl Acetate)) having excellent water resistance. .
As such, the contact surface of the auxiliary waterproof sheet 40 and the waterproof sheet 20 having the same chemical properties in the state of being attached to the surface of the waterproof sheet 20 with the water-proof plate 30 to which the auxiliary waterproof sheet 40 is attached is attached by heat fusion. By placing concrete linings 80 and 80 thereon through the boundary line 80a of the concrete linings 80 and 80, which are naturally formed when concrete is laid by a certain area and the gap between the waterproof sheets 20 Leakage can be prevented.
As such, after the waterproof sheet 40 and the index plate 30 are installed, the lining concrete 80 is poured to complete the waterproof construction of the tunnel.
4 is a cross-sectional view showing a leak prevention structure according to a second embodiment of the present invention.

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Leakage prevention structure of Figure 2 is due to the iron core 50 of the stapler is formed with a fine gap in the index plate 30 or the auxiliary waterproof sheet 40, there is a risk of leakage through this gap, in Figure 4 to prevent this In order to support the iron core 50 using a stapler after attaching a rubber tape 60 having water-expandable properties and adhesive properties that expand when water contacts between both sides of the index plate 30 and the auxiliary waterproof sheet 40 which are laminated to The watertight sheet 40, the rubber tape 60, and the water plate 30 in order to be fixed to fill the gap can be prevented from leaking.

The rubber tape 60 is a composite material of rubber and asphalt so as to cope with a strong stress by inserting a nonwoven fabric in the middle, more specifically, butyl rubber (Isobutylene-Isoprene rubber) and asphalt and water-expandable resin (hygroscopic) Resin) and SBR (Styrene Butadiene Rubber) is a double-sided adhesive tape formed by applying the adhesive formed by mixing four kinds of materials on both sides of a nonwoven fabric.

5 is a cross-sectional view showing a leak prevention structure according to a third embodiment of the present invention.

In the third embodiment, the rubber tape 60 is not attached only between both sides of the index plate 30 and the auxiliary waterproof sheet 40, but is attached to the entire bottom surface of the index plate 30 to assist the iron core 50 using a stapler. The watertight sheet 40, the rubber tape 60, and the index plate 30 are sequentially driven and fixed to both sides to improve the index and adhesiveness.

As described above, according to the present invention, by attaching the auxiliary waterproof sheet of the same material as the waterproof sheet to both sides of the index plate with the iron core of the stapler, by attaching the waterproof sheet and the auxiliary waterproof sheet by heat-sealing in the state of the waterproof sheet index plate The waterproof sheet and the index plate of different properties can be attached efficiently.

Claims (3)

The nonwoven fabric is fixedly installed on the shotcrete surface of the foundation tunnel, and the waterproof sheet is fixed to the material selected from ECB, VLDPE, EVA, and VE (VLDPE and EVA mixture) to form a waterproof layer. In the tunnel waterproof structure to pour the lining concrete so that the boundary line is formed on the water discharge sheet after installing the water stop sheet to prevent leakage through the boundary line formed when the lining concrete is poured; After installing the PVC water stop plate to the waterproof sheet, one end of the auxiliary waterproof sheet of the same material as the waterproof sheet is driven along the edge of the PVC index plate by the iron core by a stapler to connect one end to overlap, and then the auxiliary The waterproof sheet is attached to the waterproof sheet of the same material by thermal fusion, and is interposed between a double-sided adhesive rubber tape having water-expanding property and adhesive performance that expands when water comes into contact between the index plate to be laminated and the auxiliary waterproof sheet. Leakage prevention structure of waterproof sheet and lining concrete layer for tunnel. delete The method of claim 1, The watertight prevention structure of the tunnel waterproof sheet and the lining concrete layer, characterized in that the double-sided adhesive rubber tape having water-expandable properties and adhesive performance is expanded when water is in contact with the entire bottom surface of the index plate in close contact with the waterproof sheet.

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