JPS6340557Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is arranged between, for example, a tunnel's primary lining concrete and secondary lining concrete,
The present invention relates to a waterproof sheet used to prevent spring water from the primary concrete lining from seeping into the secondary concrete lining.

Conventionally, in the tunnel lining section, as shown in Figure 1, a primary lining concrete b is cast on the ground a side, and a waterproof sheet c is attached to the primary lining concrete b using bolts, concrete nails, etc. After the waterproof sheet c is nailed and fixed, a secondary lining concrete d is placed on the waterproof sheet c, and the waterproof sheet c is interposed between the primary and secondary lining concrete b and d to drain spring water. By allowing drainage to flow down between the primary lining concrete b and the waterproof sheet c, spring water from the primary lining concrete b side is prevented from seeping into the secondary lining concrete d side. In this case, it is desired that spring water from the primary lining concrete side can flow smoothly between the primary lining concrete b and the waterproof sheet c.

For this purpose, a waterproof sheet has been proposed in which a non-woven fabric is laminated over the entire surface of one side of a synthetic resin base sheet (Utility Model Publication No. 51-37844). Because of the different degrees of bending, the synthetic resin base sheet and the nonwoven fabric will restrict each other when used in a curved or bent manner, making it impossible to curve or bend the material sufficiently. In some cases, it was difficult to construct.

Furthermore, when connecting tarpaulin sheets together, if the adhesive layers of the tarpaulin sheets are simply glued to each other, the adhesive layer may easily peel off if force is applied to the tarpaulin sheet due to pressure from the ground, etc. The problem is that it peels off, making it impossible to maintain watertightness.

The present invention was developed in view of the above circumstances, and it ensures the permeability of spring water when the tarpaulin sheet is stretched, is easy to curve or bend the tarpaulin sheet, and can be easily and watertightly attached to each other. It is an object of the present invention to provide a connecting structure for waterproof sheets that can be connected together.

In order to achieve the above object, the present invention fixes a water-permeable band-like body along the width direction to a part of one surface of the main body of the water-impermeable base sheet, and fixes a water-permeable band-like body along the width direction to one end of the main body of the water-impermeable base sheet. A waterproof sheet is provided with an adhesive layer and a second adhesive layer is provided along the width direction on the other end of the main body of the water-impermeable base sheet in the width direction, and the waterproof sheets are interconnected. Sometimes,
The first adhesive layer of one tarpaulin sheet is adhered to the other end in the longitudinal direction of one surface of the sheet main body of the other tarpaulin sheet, and the sheet main body of the other waterproof sheet is bonded to the second adhesive layer of the other tarpaulin sheet.
The second adhesive layer is bent at one end in the length direction of the adhesive layer, and the second adhesive layer is adhered to a portion adjacent to the second adhesive layer on the other surface of the sheet main body of the other waterproof sheet. , a connecting portion in which the second adhesive layer of the other tarpaulin sheet, the sheet main body of the other tarpaulin sheet, the first adhesive layer of one tarpaulin sheet, and the sheet main body of one tarpaulin sheet are stacked in this order. It is.

According to the waterproof sheet of the present invention, by disposing it between the primary lining concrete and the secondary lining concrete, the main body of the water-impermeable sheet prevents spring water from flowing from the primary lining concrete side. It is possible to reliably prevent water from seeping into the secondary lining concrete side, and also to allow spring water from the primary lining concrete side to permeate into the permeable strip, creating a gap between the primary lining concrete and the main body of the impermeable sheet. It is possible to ensure drainage by allowing the water to flow down. In addition, the waterproof sheet according to the present invention has excellent flexibility because the water-permeable layer (water-permeable band) is only partially formed on the main body of the sheet, so the flexibility of the main body of the sheet is less restricted by the water-permeable layer. It is easy to install on curved parts.

When connecting tarpaulins to each other, the first adhesive layer of one tarpaulin sheet is bonded to the other longitudinal end of one surface of the main body of the other tarpaulin sheet, and the main body of the other tarpaulin sheet is The second adhesive layer is folded at one end in the length direction of the other waterproof sheet, and the second adhesive layer is
A sheet main body of the other waterproof sheet, a second adhesive layer of the other waterproof sheet, adhered to the adjacent part of the adhesive layer,
Since the connecting portion is formed by stacking the sheet main body of the other waterproof sheet, the first adhesive layer of one waterproof sheet, and the sheet main body of one waterproof sheet in this order, the above-mentioned adhesive layers Since both sheets are easily and watertightly connected, water leakage from the joints of the sheets is reliably prevented, and a strong connection is formed at the ends of the waterproof sheets, preventing water from leaking from the ground. Even if force is applied to the tarpaulin sheets due to pressure, etc., the connection between the tarpaulin sheets will not be broken, and in this case, the tarpaulin sheet according to the present invention has a large degree of freedom as a sheet itself as described above, so the tarpaulin sheet Since it can be easily bent or stretched even when force is applied to the waterproof sheet, it prevents excessive force from being applied to the connection part, and maintains a strong connection between the connection parts, which also makes the connection between the tarpaulin sheets stable. This will be ensured.

Below, Figures 2 to 4 will be explained for one embodiment of the present invention.
This will be explained with reference to the figures.

Here, FIGS. 2 and 3 show an example of a waterproof sheet, and FIG. 4 shows an example of a connection structure of the present invention using the same waterproof sheet.

1 in the figure is fixed to the inner circumferential surface of the primary lining concrete in the tunnel with fixing members such as bolts and concrete nails to prevent spring water from leaking from the primary lining concrete side to the secondary lining concrete side. It is a waterproof sheet. This waterproof sheet 1 has a first adhesive layer 3 formed on one end of the water-impermeable base sheet main body 2 in the length direction and continuous along the width direction, and the other surface of the main body 2 in the length direction. A second adhesive layer 4 that is continuous along the width direction is formed on the other end,
A water-permeable strip 5a made of a water-permeable material such as a non-woven fabric is disposed on one surface of the main body 2 adjacent to the first adhesive layer 3 and continuous along the width direction, and a water-permeable band 5a made of a water-permeable material such as a non-woven fabric is disposed on one surface of the main body 2. A water-permeable strip 5b made of a similar water-permeable material such as a non-woven fabric is disposed continuous along the width direction at a predetermined distance from the other edge in the width direction. Further, on the other surface of the main body 2, the first
A plurality of fixing member driving melt spot portions 6 are formed at predetermined distances from each other along the width direction, corresponding to the adhesive layer 3 and the first water-permeable strip 5a, respectively. Note that release tapes 7 and 8 are laminated on the surfaces of the first and second adhesive layers 3 and 4, respectively.

As shown in FIG. 3, the melt spot section 6 has a ring-shaped frame 9 made of a synthetic resin, the surface of which is coated with a luminous substance such as fluorescent paint, protruding from the other surface of the main body 2. A disc-shaped washer 10 is fitted into a body 9, and a heat-fusible material 11 is filled thereon.The main body 2 is a suitable hot melt film such as an ethylene-vinyl acetate copolymer hot melt film. It is attached with adhesive.

Further, as shown in FIG. 3, the first water-permeable strip 5a is heat-sealed 12 to the main body 2 in a point-adhesive manner corresponding to the formation location of the melt spot portion 6.
The other parts are not bonded to the main body 2, and the gap 13
The second water-permeable strip 5b is also heat-sealed to the main body 2 at a predetermined distance from each other in a spot bonding manner, and the other portions are not bonded to the main body 2.

The water-impermeable base sheet main body 2 can be formed of a plastic sheet, a rubber sheet, a composite sheet made by laminating these sheets on metal foil, etc., but in particular, a polyethylene sheet, an ethylene-vinyl acetate copolymer sheet, etc. preferable. Further, as the heat-fusible substance 11, a hot-melt adhesive whose main raw material is an ethylene-vinyl acetate copolymer or the like;
Raw rubber, synthetic rubber, etc. are preferably used. Furthermore,
The first and second adhesive layers 3 and 4 can be formed of an asphalt-based adhesive, a rubber-based adhesive, or an adhesive tape holding these adhesives, respectively. Furthermore, as the water-permeable material forming the water-permeable strips 5a and 5b, a sheet made of a nonwoven fabric made of synthetic resin such as polyethylene, polypropylene, polyester, or nylon, or an open-cell foam such as polyvinyl chloride or polyurethane is used. can.

When attaching the waterproof sheet 1 having the above structure to the primary lining concrete 14 in a tunnel, as shown in FIG.
a, 5b inside (primary lining concrete 14 side)
The waterproof sheet 1 is arranged with the melt spot portion 6 and the second adhesive layer 4 facing outside (one side of the waterproof sheet 1 faces the primary lining concrete 14), and is attached to the primary lining concrete 14. However, when connecting one waterproof sheet 1 and another waterproof sheet 1', the release sheet 7 of the first adhesive layer 3 of one waterproof sheet 1 is peeled off, and this first adhesive layer 3 is peeled off. One end of one surface of one waterproof sheet 1 in the longitudinal direction is overlapped with the other end of one surface of another waterproof sheet 1' in the longitudinal direction via the layer 3, and the second adhesive layer 4 of the other waterproof sheet 1' is overlapped. Peel off the release sheet of
4 side), bend one waterproof sheet 1 so that the melt spot portion 6 is on the outside, and fold the second adhesive layer 4' on the other end of the other waterproof sheet 1' in the length direction. They are superimposed on each other. Therefore, as a result, the overlapped portion of one sheet 1 and another sheet 1' and the overlapped portion of another sheet 1' are bonded to each other via the first adhesive layer 3 and the second adhesive layer 4', respectively. The adhesive layers 3 and 4' provide water-tight contact, which allows the primary lining concrete 14
From the side, the sheet main body 2' of another tarpaulin sheet 1', the second adhesive layer 4' of another tarpaulin sheet 1', the sheet main body 2' of another tarpaulin sheet 1', and the first sheet of one tarpaulin sheet 1.
A connection portion is formed by overlapping the adhesive layer 3 and the sheet main body 2 of one waterproof sheet 1 in this order. Also,
The first water-permeable strip 5a of one waterproof sheet 1 and the second water-permeable strip 5b' of the other waterproof sheet 1' are arranged adjacent to each other in contact with the primary lining concrete 14. In this state, a fixing member 15 such as a bolt or a concrete nail is cast into the primary lining concrete 14 from the melt spot portion 6 through the washer 10 to fix the mutual ends of the sheets 1 and 1'. Furthermore, the heat-melted heat-fusible material 17 is injected onto the head 16 of the fixing member 15 using an injection device such as a hand gun, and the heat-fusible material 17 is injected into the heat-fusible material filled in the frame 9. 11, and the head 16 of the fixing member 15 is covered with a film of the heat-fusible material 17. Therefore,
This covers the head 16 of the fixing member 15 in a watertight manner. Furthermore, the fixing member 15 is similarly driven into the melt spot portion 6 corresponding to the first water-permeable strip 5a.

Although not shown, secondary lining concrete is cast from the outside (the side where the melt spots 6 are arranged) for the waterproof sheets 1, 1', . . . that have been successively connected in this way.

According to the waterproof sheet 1 according to the embodiment described above,
A permeable strip 5a on the primary lining concrete 14 side,
5b, the spring water from the primary lining concrete 14 side flows through these permeable strips 5a, 5.
b, and flows inside these. In this case, although the waterproof sheet 1 of the above embodiment has a water permeable layer formed only partially and not over the entire surface, the water permeable strips 5a and 5b alone are sufficient to allow spring water to flow down. It is cheaper in terms of cost than one in which a water-permeable layer is formed on the entire surface. In addition, a waterproof sheet in which a water-permeable material such as non-woven fabric is formed on the entire surface of an impermeable base sheet is
If the sheet is to be bent or curved to a considerable degree, even if the main body of the sheet is made of a stretchable material such as an ethylene-vinyl acetate copolymer sheet, the main body of the sheet will be restricted by the water-permeable material and will not stretch sufficiently. On the other hand, even if a stretchable waterproof material is used as a water permeable material, if the main body of the sheet is not stretchable, the water permeable material will be restricted by the main body of the sheet and will not stretch sufficiently. It is difficult to construct because it is not sufficiently curved or bent. On the other hand, in the waterproof sheet 1 of the above embodiment, the water-permeable layer (water-permeable strips 5a, 5b) is only partially formed on the sheet main body 2, so it is itself regulated by the water-permeable layer of the sheet main body 2. In particular, the water-permeable strip 5 of the sheet main body 2
The parts where a and 5b are not arranged can be bent freely, and the water-permeable strips 5a and 5b are not bonded to the main body 2 on the entire surface, but are only partially heat-sealed in a spot bonding manner, and are not bonded. Since the number of adhesive parts is very small compared to the parts, the parts of the sheet main body 2 where the water-permeable strips 5a and 5b are arranged are also subject to these restrictions to a very small extent and can be sufficiently bent, so that curved parts etc. It is easy to construct.

Further, according to the waterproof sheet 1 according to the embodiment described above, the frame body 9 is provided protrudingly on one surface of the sheet main body 2, and the melt spot portion 6 filled with the heat-fusible substance 11 is formed therein. By driving the fixing member 15 through the heat-fusible material 11 of the melt spot portion 6, a portion of the head 16 of the fixing member 15 driven through the heat-fusible material 11 is inserted into the heat-fusible material 11. Therefore, when the heat-fusible substance 17 is further injected into the head 16 of the fixing member 15 using a hand gun or the like, the fixing member 15
A film of the heat-fusible material 17 can be easily formed over the head 16 of the frame 9, and since this film and the heat-fusible material 11 in the frame 9 are of the same quality, they have good adhesion to each other. , a film with good watertightness is formed to reliably cover the head 16 of the fixing member 15 in a watertight manner. Therefore, there is no possibility that spring water will leak from the primary lining concrete 14 side to the secondary lining concrete side through the head 16 of this fixing member 15. Furthermore,
The overlapping part at the end of one sheet 1 and the other sheet 1' and the folded overlapping part of the other sheet 1' are also the first adhesive layer 3 and the second adhesive layer 4', respectively.
Since the fixing member 15 is in close contact with watertight
Even if spring water leaks from the primary lining concrete 14 side along the outer peripheral wall of the primary lining concrete 14, water leakage from the overlapped portion is reliably prevented. Therefore, watertightness is maintained in all parts of the cast part of the fixing member 15, and spring water from the primary lining concrete 14 side is transmitted through the cast part of the fixing member 15 to the secondary lining concrete side. There is no leakage, and one sheet 1 and the other sheet 1' are connected with high watertightness. Moreover, the connection between one sheet 1 and the other sheet 1' is strong, and the waterproof sheet 1,
Even if a force is applied to 1', the connection between the waterproof sheets 1, 1' will not be released, and in this case, the waterproof sheets 1, 1' have the degree of freedom of the sheet main body 2, 2' as described above. is large, so waterproof sheet 1,
Since it can be easily bent or expanded even when a force is applied to 1', excessive force is prevented from being applied to the connection part, and a strong connection of the connection part is maintained. Therefore, also in this respect, the mutual connection between the waterproof sheets 1 and 1' is stably ensured.

Furthermore, according to this embodiment, since the frame body 9 is coated with fluorescent paint, the location where the fixing member 15 is to be driven can be easily confirmed even in a relatively dimly lit tunnel, resulting in good workability. be.

FIG. 5 shows another embodiment of the present invention. In this embodiment, a water-permeable strip 5c made of water-permeable non-woven fabric or the like is formed into a flat cylindrical shape. The parts corresponding to the main body 2 are heat-sealed to the main body 2 in a point-adhesive manner, and the other configurations and effects are the same as those of the above-mentioned embodiments, so their explanations will be omitted.

In the above embodiment, the water-permeable strip was partially heat-sealed to the sheet main body 2, but the means for fixing the water-permeable strip to the sheet main body 2 is not particularly limited. Subject 2
It may be fixed to. Furthermore, the number of water-permeable strips provided is not limited to the above embodiment. Furthermore, in the above embodiment, the waterproof sheets 1, 1' are provided on the inner peripheral wall of the primary lining concrete 14.
When fixing the end of the fixing member 15, the head 16 of the fixing member 15
Although the heat-melted heat-fusible material 17 is injected as a means of forming a coating covering the frame body 9, the present invention is not limited to this. Head 16 of member 15
The heat-fusible material 11 may be melted by heating the vicinity with a burner or the like, thereby fluidizing the heat-fusible material 11 and covering the head 16. It is also possible to provide only the body 9 and supply the heat-fusible substance into the frame 9 during work, and furthermore, use a washer 11 with a through hole as the washer 11 disposed inside the frame 9. You can also drive the fixing member through the hole in this washer.
Furthermore, instead of the heat-fusible substance, an adhesive substance can be filled into the frame with the washer facing down, and water can be stopped by the adhesive action of the adhesive substance on the fixing member. In this case, the frame can be omitted and a layer of adhesive material can be directly formed on the main body of the sheet. Further, depending on the case, the waterproof construction using a heat-fusible material or an adhesive material may be omitted, and other configurations may be modified in various ways without departing from the gist of the present invention.

As explained above, the waterproof sheet according to the present invention has a water-permeable strip fixed to a part of one surface of the main body of the water-impermeable base sheet, so that the water-permeable strip is placed facing the primary lining concrete side. When this happens, spring water from the primary lining concrete side flows into this water-permeable band and can easily flow down, and since it is easy to curve or bend, it is easy to install in curved parts.

In addition, the connection structure of the waterproof sheet according to the present invention is
From the primary lining concrete side, the main body of the other waterproof sheet, the second adhesive layer of the other waterproof sheet,
The main body of the other waterproof sheet, the first adhesive layer of one of the waterproof sheets, and the main body of one of the waterproof sheets form a connection part that is stacked in this order, so that both the adhesive layers Since the sheets are easily and watertightly connected, water leakage from the joints of the sheets is reliably prevented, and a strong connection is formed at the ends of the waterproof sheets, reducing pressure from the ground. Even if force is applied to the tarpaulin sheets due to such reasons, the mutual connection between the tarpaulin sheets will not be broken. Moreover, in this case, since the waterproof sheet according to the present invention has a large degree of freedom as a sheet itself, it can be easily bent or stretched even when force is applied to the waterproof sheet, and therefore, excessive force is not applied to the connecting parts. Since this prevents the leakage and maintains a strong connection at the connecting portions, a highly watertight connection between the tarpaulin sheets is ensured in this respect as well.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a tunnel lining section where a waterproof sheet is installed, Figure 2 is a sectional view showing an example of the waterproof sheet of the present invention, and Figure 3 is a partially omitted section along the line shown in Figure 2. FIG. 4 is a partially omitted enlarged sectional view of a connection structure using the waterproof sheet, and FIG. 5 is a cross-sectional view showing another example of the waterproof sheet of the present invention. 1, 1'... Waterproof sheet, 2, 2'... Sheet main body, 3, 4, 4'... Adhesive layer, 5a, 5b, 5
c... Water-permeable belt-like body, 6... Melt spot portion, 9
... Frame body, 11 ... Heat-fusible material, 14 ... Primary lining concrete, 15 ... Fixing member.

Claims (1)

[Claims for Utility Model Registration] 1. A water-permeable band-like body is fixed along the width direction on a part of one surface of the main body of the water-impermeable base sheet, and a first adhesive is fixed along the width direction at one end in the length direction of one surface. A mutual connection structure of waterproof sheets in which a second adhesive layer is provided along the width direction on the other end of the other surface of the main body of the water-impermeable base sheet in the width direction,
The first adhesive layer of one waterproof sheet is adhered to the other end in the length direction of one surface of the sheet main body of the other waterproof sheet, and the sheet main body of the other waterproof sheet is bonded to one longitudinal end edge of the second adhesive layer. This second adhesive layer is then glued to the adjacent part of the second adhesive layer on the other side of the sheet main body of the other tarpaulin sheet, and the second adhesive layer of the other tarpaulin sheet is folded at A connection of tarpaulin sheets characterized by comprising a connecting portion in which an adhesive layer, a sheet main body of another tarpaulin sheet, a first adhesive layer of one tarpaulin sheet, and a sheet main body of one tarpaulin sheet are stacked in this order. structure. 2. A waterproof sheet according to claim 1, which is a utility model registration, in which a water-permeable strip is partially adhered to a water-impermeable base sheet in a dot-like manner. 3 Utility model registration claim 1, in which a frame body for filling a heat-fusible substance is provided on one longitudinal end of the other surface of the main body of the water-impermeable base sheet in correspondence with the adhesive layer formed on one surface thereof. Or the waterproof sheet described in paragraph 2. 4. The waterproof sheet according to claim 3 of the utility model registration claim, in which the frame is filled with a heat-fusible substance in advance.