JP3918163B2 - Tunnel waterproofing method and waterproof sheet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tunnel waterproofing method and a waterproof sheet that cover a tunnel waterproofing construction surface with a flat bag-shaped hollow waterproof sheet.
[0002]
When the waterproof construction construction surface of the tunnel is covered with such a waterproof sheet, the waterproof sheet is applied twice, so that the waterproof property is better than that of the single waterproof sheet.
[0003]
[Prior art]
A tunnel waterproofing method is already known in which two waterproof sheets are stacked, the edges in the width direction are welded, and the waterproof construction surface of the tunnel is covered with a flat bag-shaped hollow sheet. . However, the prior art has the following problems.
The hollow waterproof sheet needs to be sealed. If the sealing performance is poor, the usefulness of the hollow or double structure is lost. For the sealing test, a negative pressure is applied to the inside of the hollow waterproof sheet.
[0004]
In the conventional hollow waterproof sheet, when a negative pressure is applied, the double sheet in the hollow waterproof sheet is in close contact with the area close to the negative pressure connection port where the hollow waterproof sheet is provided. Negative pressure does not reach far away, and the accuracy of the sealing test may not be obtained. Conventionally, this problem has not been solved.
[0005]
In addition, conventionally, when placing lining concrete, the hollow waterproof sheet may be pressed with the cast concrete, and the concrete placement region of the hollow waterproof sheet may be closed. For this reason, the internal air of the hollow waterproof sheet is biased to the inside of the waterproof sheet in the concrete non-placed area as the laying concrete is placed, and the hollow waterproof sheet in the part where the internal air is biased is swollen and higher than the other parts. The hollow waterproof sheet in the portion fixed to the tunnel waterproofing construction surface may be peeled off, resulting in poor waterproofing construction.
[0006]
In addition, the actual situation is that a negative pressure load, not a positive pressure, is applied to the sealing test of the hollow waterproof sheet. Assuming that positive pressure is applied, the swelling of the hollow waterproof sheet due to the bias of the internal air due to the placement of the lining concrete becomes larger, and the hollow waterproof sheet may be peeled off from the tunnel waterproofing construction surface. Become.
[0007]
[Problems to be solved by the invention]
Accordingly, the present invention provides a tunnel waterproofing method in which a flat bag-shaped hollow waterproof sheet is applied. When a negative pressure is applied to the inside of the hollow waterproof sheet for sealing performance, the negative pressure is applied to the hollow waterproof sheet. It is intended to be able to perform an accurate sealing test by spreading over substantially the entire area.
[0008]
Another problem of the present invention is that the internal air of the hollow waterproof sheet stretched on the waterproof construction surface of the tunnel is biased to the area where the lining concrete is not placed due to the placement of the lining concrete, There is in solving the problem.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides the following tunnel waterproofing method and waterproof sheet.
(1) A flat bag-like hollow shape having double connection ears and a spacer that separates the opposing inner surfaces of the bag from each other while forming an air flow path, Both or one is a hollow waterproof sheet having a spacer that separates the connection ears under the formation of an air flow path, and the spacer is formed by a protrusion or small protrusion dispersed in the bag-like portion and the connection ear. The formed hollow waterproof sheet is stretched to cover the waterproof construction work surface of the tunnel, and the connection ears on the ground side of adjacent hollow waterproof sheets and the connection ears on the inner side of the tunnel are welded to each other. A tunnel waterproofing method characterized by that.
(2) A hollow bag having a flat bag shape and having a spacer that separates the opposing inner surfaces of the bag from each other while forming an air flow path, and the hollow waterproof sheet having double connection ears is spaced. The two waterproof sheets are connected to the adjacent waterproof sheet, and the two waterproof sheets are connected to at least one of the two connection waterproof sheets. Using one having a spacer that separates under the formation of the air flow path, one waterproof sheet for connection is welded across the connection ear part and the connection ear part on the ground side of the adjacent hollow waterproof sheet, and the other In this method, a single connection waterproof sheet is welded across the connection ear portion and the connection ear portion on the inner side of the hollow waterproof sheet to form a connection portion composed of a double connection waterproof sheet. The spacer is dispersed in the bag-like portion and the connection ear portion. Waterproof method of tunnel, characterized in that those which are formed by ridges or small projection.
(3) A tunnel waterproof sheet having double connection ears and one or both of them connecting the connection ears of adjacent waterproof sheets to each other under the air flow path formation. A spacer having a flat bag-like hollow shape and a spacer for separating the opposing inner surfaces of the bag while forming an air flow path, the spacer comprising the bag-like portion and the connection ear portion A tunnel waterproof sheet, characterized in that it is formed of ridges or small protrusions dispersed in a slab, and a suction pipe connecting portion is provided in the bag-like portion.
[0010]
According to the tunnel waterproofing method of (1) and (2) above, the waterproofing construction surface of the tunnel is substantially entirely waterproofed with a double sheet structure.
[0011]
The hollow waterproof sheet, that is, the double waterproof sheet in the waterproof construction of (3) is separated by the spacer under the formation of the air flow path. Therefore, in the hollow waterproof sheet of the present invention, when a negative pressure is applied to the inside, the negative pressure spreads over substantially the entire area of the hollow waterproof sheet, and an accurate airtightness test can be performed.
[0012]
Further, the separation of the opposing inner surfaces of the hollow waterproof sheet while forming the air flow path eliminates the bias of the internal air of the hollow waterproof sheet due to the placement of the lining concrete. For this reason, the hollow waterproof sheet of the part fixed to the waterproof construction construction surface of the tunnel peels off, and the problem that waterproof construction becomes defective is solved.
[0013]
When both or one of the double connection ears of the hollow tarpaulin has a spacer that separates the connection ears under the air flow path formation, the double connection ears are also placed with lining concrete. There is no bias of the internal air at the time, and good waterproofness is obtained.
[0015]
The sealing test of the connected double ears may be performed with a positive pressure load on the inner space of the ears.
In the waterproof construction of the specifications of (1) and (2) above, it is sufficient that the waterproofing component is the same hollow waterproof sheet, and the maintenance is simpler and more advantageous than the case of using multiple types of waterproofing components. It is.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a flat bag-like hollow waterproof sheet according to the present invention. The hollow waterproof sheet 1 has a double sheet structure in which two waterproof sheets 1a and 1a are overlapped and the edges in the width direction are sealed. The hollow waterproof sheet 1 has a suction pipe connecting portion P.
[0017]
In the hollow waterproof sheet 1, the inner surfaces facing each other of the bag in the bag shape, in other words, the double sheets 1a and 1a in the hollow prevention sheet are substantially separated from each other under the formation of the air flow path. The spacer 2 is provided. The spacer 2 can be exemplified as follows. The ridges 23 (FIG. 3) formed dispersed throughout the inside of one of the sheets 1a, 1a, the juxtaposed ridges 24a and the sheet 1a formed throughout the inside of one of the sheets 1a, 1a, The composite 24 (FIG. 4) by the grid | lattice-like member 24b interposed between 1a, the small processus | protrusion 25 (FIG. 5) or 26 (FIG. 6) formed in the whole area inside one side of the sheet | seats 1a and 1a A coil-shaped member 27 (FIG. 7) or the like interposed between the sheets 1a and 1a throughout.
[0018]
The hollow waterproof sheet 1 has double connection ears 1b and 1c. In the hollow waterproof sheet 1, both or one of the double connection ears 1b and 1c is provided with a spacer 3 for separating the connection ears 1b and 1c substantially entirely in the form of an air flow path. What was done (FIG. 1), or what does not have a spacer (FIG. 2) is applied. For the convenience of distinguishing between these two types of hollow waterproof sheets, the hollow waterproof sheet with the connection ear portion having the spacer is the first hollow waterproof sheet 1-1, and the hollow waterproof sheet without the connection ear portion having the spacer is the second hollow waterproof sheet. 1-2.
[0019]
The construction method of the first hollow waterproof sheet 1-1 and the second hollow waterproof sheet 1-2 is as follows.
[0020]
(1) The first hollow waterproof sheets 1-1 are arranged so as to be adjacent to each other in the tunnel length direction, and are stretched on the waterproofing construction surface 4 of the tunnel, and the first hollow waterproof sheets 1-1, 1-1 are adjacent to each other. The connection ears 1c and 1c on the natural ground side are welded to each other, and the connection ears 1b and 1b on the inner side of the well are welded to each other (FIG. 10). This welding may be performed according to an appropriate specification known per se.
[0021]
(2) The second hollow waterproof sheets 1-2 are arranged so as to be adjacent to each other in the tunnel length direction, and are stretched on the waterproofing construction surface 4 of the tunnel, and the second hollow waterproof sheets 1-2, 1-2 are adjacent to each other. The connection ears 1c and 1c on the natural ground side are welded to each other, and the connection ears 1b and 1b on the inner side of the well are welded to each other. The welding may be performed according to an appropriate specification known per se.
[0022]
Although illustration of construction of this case is omitted, the illustration in which the spacers 3 of the double connection ears 1b, 1b, 1c, and 1c are omitted in FIG. 10 corresponds to the illustration.
[0023]
(3) Or the second hollow waterproof sheet 1-2 is stretched on the tunnel waterproof construction surface 4 with an interval in the tunnel length direction, and adjacent to the second hollow waterproof sheet 1-2, 1-2. One of the double sheets 10 and 10 'is welded at the connection ears 10c' and 10c 'over the connection ears 1c and 1c on the natural ground side, and the double sheet is extended over the connection ears 1b and 1b on the inner side of the well. Is welded at the connection ears 10b 'and 10b' (FIG. 11). This welding may be performed according to an appropriate specification known per se.
[0024]
In the specifications of the above (2) and (3), the double sheet 10, 10 ′ has both or one spacer 2 ′ for separating the sheets 10, 10 ′ substantially under the formation of the air flow path. Has. In the illustrated example, one sheet has a spacer 2 '. The spacer 2 ′ can be exemplified by the same spacer 2 ′. The hollow waterproof sheet 1 ′ formed by welding the connection ears of the sheets 10 and 10 ′ to the connection ears 1b, 1b, 1c, and 1c of the adjacent hollow waterproof sheets 1 and 1 includes the suction pipe connection P 'Is provided.
[0025]
In the present invention, the waterproofing construction surface of the tunnel is subjected to a waterproofing work having a substantially double sheet structure.
[0026]
【The invention's effect】
According to the present invention, in a tunnel waterproofing method in which a flat bag-shaped hollow waterproof sheet is applied, when a negative pressure is applied to the inside of the hollow waterproof sheet for sealing performance, the negative pressure is applied to the hollow waterproof sheet. This effectively spreads over the entire area, and the effect of being able to conduct an accurate sealing test is achieved.
[0027]
In addition, the air inside the hollow waterproof sheet stretched on the waterproof construction surface of the tunnel was not biased to the area where the lining concrete was not placed due to the placement of the lining concrete, and was fixed to the waterproof construction surface of the tunnel This solves the problem that the waterproof construction of the part is peeled off and the waterproof construction is poor.
[0028]
In the waterproof construction according to claims 1 and 2 and the waterproof construction using the waterproof sheet according to claim 3 , a single waterproof waterproof component is sufficient for the waterproof material, and a plurality of waterproof components are used. In some cases, maintenance is simple and advantageous.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a hollow waterproof sheet according to the present invention.
FIG. 2 is a cross-sectional view of another example of the hollow waterproof sheet according to the present invention.
FIG. 3 is a perspective view showing an example of an embodiment of a spacer of a hollow waterproof sheet.
FIG. 4 is a perspective view of an example of a spacer example different from the above.
FIG. 5 is a perspective view showing another example of the spacer.
FIG. 6 is a perspective view showing an example of a different aspect of the spacer from the above.
FIG. 7 is a perspective view showing still another example of the spacer.
8 is an enlarged front view of the spacer shown in FIG. 6. FIG.
9 is a cross-sectional view taken along line IX-IX in FIG.
10 is a schematic perspective view of construction specifications for waterproofing work by the hollow waterproof sheet shown in FIG. 1. FIG.
11 is a schematic perspective view of construction specifications for waterproofing using the hollow waterproof sheet shown in FIG. 2. FIG.
FIG. 12 is a cross-sectional view showing a structure for connecting a suction pipe of a hollow waterproof sheet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hollow waterproof sheet 1a, 1a Double sheet | seat 1b in a hollow waterproof sheet Connection ear part 1c Connection ear part 10, 10 'Double sheet 10b Connection ear part 10b' Connection ear part 10c 'Connection ear part 2, 2', 3 Spacer P, P 'Suction tube connection 4 Tunnel waterproofing construction surface

Claims (3)

The mutual inner surfaces and opposing bag in flat bag-like hollow shape having a double connection ears have a spacer away under shaping air passage, one or both of the double connecting ears Is a hollow waterproof sheet having a spacer that separates the connection ears under the formation of the air flow path , and the spacer is formed by protrusions or small protrusions dispersed in the bag-like part and the connection ears. The hollow waterproof sheet is stretched to cover the waterproof construction construction surface of the tunnel, and the connection ears on the ground side of adjacent hollow waterproof sheets and the connection ears on the inner side of the tunnel are welded to each other. Tunnel waterproofing method. It has a flat bag-like hollow shape and has a spacer that separates the opposing inner surfaces of the bag from each other under the formation of an air flow path. Two waterproof sheets for connection are used to connect adjacent waterproof sheets, and air flows between the two waterproof sheets for connection to at least one of the two waterproof sheets for connection. Using one having a spacer that is separated under the formation of a path, one waterproof sheet for connection is welded across the connection ear part and the connection ear part on the ground side of the adjacent hollow waterproof sheet, and the other one sheet the waterproof sheet for connection, by welding across the the connecting ears hollow tarpaulin downhole side of the connecting ear, a method for forming a connecting portion made of a waterproof sheet for double connection, the A protrusion in which spacers are dispersed in the bag-like portion and the connection ear portion Waterproof method of tunnel, characterized in that is being formed by the small projections. A waterproof sheet for a tunnel, where two or more connection ears are connected to each other, and when the connection ears of adjacent waterproof sheets are connected to each other, the connection ears are separated under the formation of an air flow path. It has a spacer, has a flat bag-like hollow shape, and has a spacer that separates the opposing inner surfaces of the bag under the formation of an air flow path, and the spacer is dispersed in the bag-like part and the connection ear part. ridges or is formed by small protrusions, tunnel tarpaulins, wherein Rukoto connection part suction pipe provided in the pouched part.

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