JP4301354B2 - Structure of water-stopping material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a water-stopping material that is used by being installed in a joint part or a gap part of a structure, a standard part or a final joint part of a submerged box, and more particularly, a liquid or gas from a rubber-like elastic material. The present invention relates to a structure of a water-stopping material that can be applied to a joint portion having a large gap or a place where the gap interval is not constant.
[0002]
[Prior art]
Conventionally, for example, as a waterstop material used for the submergence method of a submerged box tunnel, a waterstop panel is attached to the outer peripheral surface of the terminal part of the submerged box one by one by diving work and tightened with bolts to temporarily stop the water. Water blocking material that performs water sealing, water blocking material of the terminal block method that performs water stopping work by pushing out a small block provided on the end face of the submerged box, and V block method that performs water blocking by dropping the V block into the connection part of the submerging box Water-stopping materials are known.
[0003]
[Problems to be solved by the invention]
By the way, the water-stopping rubber (water-stopping material) used for the final joint of the submerged box is a rubber material equivalent to the rubber material used for the general joint, and there is a problem that the cost of the joint portion is increased. In addition, among the conventional final joint methods as described above, those using a water stop panel are excellent in economic efficiency, but further reduce the joint interval, that is, reduce the number of post-cast concrete and water stop at the corner. Issues such as improvement of water and response to deep water remain.
[0004]
Furthermore, when the conventional water-stopping rubber is attached to the lower part of the submerged box, there is a problem that the water-stopping rubber hangs down due to its own weight and hinders the movement of the water-stopping collar.
[0005]
An object of the present invention is to introduce a liquid such as water or a gas such as air into a bag made of a rubber-like elastic material and expand the bag, so that a joint part or a void part of a structure, a standard part of a submerged box, Water can be stopped at the final joint, etc., and the water stop member can be prevented from sagging due to its own weight, and the water stop can be improved by protecting the water stop member. It is providing the structure of the water stop material which can reduce a space | interval.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a structure for a water-stopping material using a bag-like water-stopping member that is installed in a joint portion or a void portion of a submerged box and that is stopped by injecting a liquid or a gas to expand it. The water-stopping member is formed into a bag-like shape that can be expanded and contracted, and is formed on the outer peripheral surface of the joint portion of the submergence box. The gist of the invention is that it is disposed in the recess and is folded and stored in the recess when the sinking box is not connected, and is expanded by opening the cover member covering the storage when connected .
[0007]
The water stop member is an annular expansion / contraction bag.
[0009]
The present invention is configured as described above, such as a joint part or a gap part of a structure, a standard part or a final joint part of a submerged box, a bag made of a rubber-like elastic material, a liquid such as water, air, etc. It is possible to stop water by introducing and expanding the gas, and it is also possible to cope with water stopping in a particularly large gap portion or a place where the water pressure is high.
[0010]
In addition, when a water-stopping member is provided at the final joint of the submergence box, when the terminal of the submergence box is connected, an annular water-stop collar provided on the outer peripheral surface of the submergence box is slid to connect the outer periphery of the connection part of the submergence box. Covering the surface and inflating a water-stopping member made of a rubber-like elastic body provided between the outer peripheral surface of the submerged box and the vicinity of both ends of the water-stopping collar, so that the outer peripheral surface of the submergence box and the water-stopping collar are watertight Can be sealed.
[0011]
Further, the water stop member is folded and accommodated in the storage portion of the annular recess provided in the submergence box, and the cover member is provided to cover the storage portion when the water stop member is expanded. The movement of the water stop collar is not hindered, the water stop member is protected, the water stop is improved, and the cost of the joint portion can be reduced.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0013]
FIG.1 and FIG.2 shows sectional drawing at the time of the natural pressurization at the time of natural pressurization in the 1st Embodiment of the water stop member 1 used for the structure of the water stop material of this invention, and this water stop member 1 is reinforcement. A rubber-like elastic material such as an inflatable / shrinkable rubber material in which the layer 2 is embedded is formed into a bag shape having a spherical cross section, and a base rubber 1a is integrally provided at the bottom, and one of the bag-like water-stopping members 1 is provided. The part is provided with a supply / discharge port (not shown) for introducing or discharging a liquid such as water or a gas such as air.
[0014]
Such a water-stopping member 1 is installed and used in a joint part or a gap part of a structure, a standard part or a final joint part of a submerged box, etc., especially in a water stop of a large gap part or a place where water pressure is high. Can also respond.
[0015]
In the following description, a case where the present invention is applied to a sinking box end connection part in a sinking tunnel will be described.
[0016]
FIG. 3 is a schematic configuration diagram of the terminal connection part of the submergence box, FIG. 4 is an enlarged sectional view of the terminal connection part of the submergence box, 3a is an existing submergence box, 3b is a new submergence box, 4a and 4b are submergence boxes 3a, A 3b bulkhead is shown.
[0017]
On the outer peripheral surface of the end portions of the top plates 3x and 3y of the submerged boxes 3a and 3b, as shown in the figure, the above-described expansion / contraction water stop member 1 and the connecting portions of the submerged boxes 3a and 3b on the outer peripheral surface thereof A slidable annular water stop collar 5 covering the outer peripheral surface is provided.
[0018]
The water stop member 1 is provided in at least two places between the water stop collar 5 and the outer peripheral surfaces of the sinking boxes 3a and 3b, and the gap between the members 5, 3a and 3b is watertight when expanded. It arrange | positions so that it may seal. In the embodiment of the present invention, two locations are provided on the outer peripheral surface of each of the sinking boxes 3a and 3b at a predetermined interval, but it is also possible to provide two or more locations.
[0019]
The water stop member 1 is configured to be folded and accommodated in a storage portion 6 of an annular recess formed on the outer peripheral surface of the end of the sinking boxes 3a and 3b when the sinking boxes 3a and 3b are not connected. Yes.
[0020]
Further, as shown in FIG. 3, the water stopping member 1 arranged as described above is provided with a pipe 7 that can supply a liquid such as water or a gas such as air at a predetermined pressure from the inside of the submerged boxes 3a and 3b. Further, a mortar injection pipe 8 for filling mortar is connected to the space 8a between the water stop members 1.
[0021]
Further, the movable water stop collar 5 is formed in a square cross section as shown in FIGS. 5 to 7, and an annular portion 10 having a concave cross section provided with ribs 9 is formed on a part of the inner wall surface. The annular portion 10 is provided with a drain port 11.
[0022]
As shown in FIGS. 8 and 9, the lower-side water-stopping member 1 hangs down by its own weight when the sinking boxes 3 a and 3 b are not connected to the storage portion 6 of the annular recess that houses the water-stopping member 1. In order to prevent this, a cover member 12 made of a rubber-like elastic body covering the opening of the storage unit 6 is provided, and both end portions of the cover member 12 are connected to the side surface of the storage unit 6 via fastening members 13 such as bolts. In addition, a slit 14 is provided in the central portion so that it can be opened and protruded when the water stop member 1 is expanded.
[0023]
That is, when a liquid such as water or a gas such as air is supplied to the water-stopping member 1 and is expanded under pressure, as shown in FIGS. 10 and 11, the slit 14 of the cover member 12 is pushed open to bulge and stop. It seals against the inner wall surface of the water collar 5.
[0024]
Next, FIG.12 and FIG.13 shows the reference example of the water stop member 1, formed in the cyclic | annular strip | belt-shaped body provided with the corrugated or bellows-like expansion-contraction part 15 in the center part of the water stop member 1, In the reference example of FIG. 12, both ends of the water blocking member 1 are vertically fixed to the inner wall surface 6a of the storage portion 6 via the holding metal fitting 16, and are formed into a trapezoidal cross section when expanded, and the reference example of FIG. Then, both ends of the water-stopping member 1 are horizontally fixed to the pedestal portion 6b of the storage portion 6 via the presser fitting 16, and are formed into a triangular cross section when expanded.
[0025]
In both reference examples, when the water stop member 1 expands, the contact portion with the water stop collar 5 becomes flat, so that the contact area increases, and it is possible to contact the inner wall surface of the water stop collar 5 and securely seal. is there. Moreover, the rubber expansion for the water stop for a separation distance of 0-200 mm is attained by setting it as such a structure.
[0026]
Next, the submergence water-stop method in the submerged tunnel using the water-stop member 1 of the present invention will be described with reference to FIGS. 14 (a) and 14 (b) and FIGS. 15 (a) to 15 (f).
[0027]
First, as shown in FIGS. 14 (a) and 14 (b), the final newly installed submerged box 3b to which the water stop collar 5 is attached is set between the existing submerged box 3a and the terminal submerged box 3c. In this embodiment, the final joint (rigid joint) will be described on the inclined end face side. Then, after the final newly installed sinking box 3b and the terminal sinking box 3c are hydraulically joined at the Z portion, the joint portion is internally constructed and connected.
[0028]
Next, the submergence water stop method will be described in detail with reference to FIGS. 15A to 15F. First, a fixing bracket (not shown) of the water stop collar 5 provided in the newly installed submergence box 3b is removed, and the crane The water stop collar 5 is horizontally moved onto the connecting portion between the newly installed sinking box 3b and the existing sinking box 3a by means of a trolley, a winch or an extrusion jack (see FIG. 15 (a)).
[0029]
Next, as shown in FIG. 15 (b), the water stop collar 5 is fixed to the sinking boxes 3 a and 3 b with a fixing bracket (not shown) such as a bolt also serving as a spacer, and pressure water is fed into the water stop member 1. The mortar stopper which expands and expands the water stop member 1 and fills the mortar is installed.
[0030]
From such a state, as shown in FIG. 15 (c), a mortar injection pipe 8 is formed in the space portion 8 a defined between the water stop collar 5 and the submerged boxes 3 a and 3 b and the water stop member 1. Through the mortar. At this time, the valve of the drain port 11 provided in the water stop collar 5 is opened, and the completion of filling is confirmed by the mortar flowing out.
[0031]
Next, after the filled mortar exhibits a predetermined strength (cured), as shown in FIG. 15 (d), an air supply valve (not shown) attached to the bulkheads 4a and 4b is opened, and a drainage pump is used. Water W between the bulkheads 4a and 4b is drained.
[0032]
Thereafter, as shown in FIG. 15 (e), the bulkheads 4a and 4b are removed to allow the sinking boxes 3a and 3b to communicate, and as shown in FIG. 15 (f), the interior of the final joint portion is constructed. After the secondary water stop treatment is performed, the outer joint plate 17a is welded to a connecting bolt (not shown), and the inner skin plate 17b is welded. Concrete G is placed in the space 18 between the skin plate 17b, and the concrete of the joint portion is internally constructed to complete the operation of the submergence water stop method.
[0033]
Since the embodiment of the present invention constructs a sinking box by the above construction method, the mortar stopper filled with the mortar can be reliably formed by the water stop member 1, and the water stop member 1 hangs down by its own weight, so that the water stop collar Thus, the water stop member 1 can be protected and the water stop can be improved.
[0034]
【The invention's effect】
Since the present invention is configured as described above, the following excellent effects can be obtained.
(1). Since the water stop member is accommodated in the storage section provided with the cover member having a concave cross section provided in the submergence box when the submergence box is not connected, it is said that the water stop member located on the lower side hangs down by its own weight. Absent.
(2). In addition, the movement of the water stop collar is not hindered, the water stop member can be protected, and the water stop can be improved.
(3). The cost of the joint part can be reduced and the joint interval can be reduced.
(4). When the water-stopping member expands, it is in watertight contact with the inner wall surface of the water-stopping collar, and a space is defined between the water-stopping collar and the water-stopping member, and this part is filled with mortar without fail. I can do it.
(5). If the extra length of the cover member provided in the storage part can reach between the submerged box and the water stop collar, the water stop member will be protected during undulation and the water stop effect of the cover member itself. Can also expect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a water-stopping member used in the structure of a water-stopping material according to the present invention when naturally pressurized in a first embodiment.
FIG. 2 is a cross-sectional view of the water-stopping member used in the structure of the water-stopping material of the present invention at the time of natural lodging in the first embodiment.
FIG. 3 is a schematic configuration diagram of a sinking box end connection portion in a sinking tunnel in which the present invention is implemented.
FIG. 4 is an enlarged cross-sectional view of a sinking box end connection portion.
FIG. 5 is a plan view of a water stop collar.
FIG. 6 is a side view of a water stop collar.
FIG. 7 is a cross-sectional view of a water stop collar.
FIG. 8 is a cross-sectional view in which a water stop member is folded and accommodated in a storage portion formed in a submerged box.
FIG. 9 is a cross-sectional view of another embodiment of FIG.
FIG. 10 is a cross-sectional view when the water stop member is expanded.
FIG. 11 is a cross-sectional view of another embodiment when the water stop member is expanded.
FIG. 12 is a cross-sectional view showing a reference example of a water stop member.
FIG. 13 is a cross-sectional view showing a reference example of a water stop member.
FIGS. 14A and 14B are explanatory diagrams of a process of sinking a final newly installed sink box with a water stop collar between an existing sink box and a terminal sink box. FIG.
FIGS. 15A to 15F are process explanatory views of a submergence water stop method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water stop member 1a Base rubber 2 Reinforcing layer 3a Existing submerged box 3b New submerged box 3c Terminal submerged box 3x, 3y Submerged top plate 4a, 4b Bulkhead 5 Water stop collar 6 Ring-shaped recessed part 7 Piping 8 Mortar Injection pipe 8a Space part 9 Rib G Mortar 10 Annular part having a concave cross section 11 Drainage port 12 Cover member 13 Fastening member such as bolt 14 Slit 15 Expansion / contraction part 6a Inner wall surface of storage part 6b Base part of storage part 16 Holding metal W Water

Claims (2)

It is a structure of a water-stopping material using a bag-like water-stopping member that is installed in a joint portion or a void portion of a submerged box, and stops by injecting a liquid or a gas to expand it,
The water-stop member is formed in a bag shape that is made of a rubber-like elastic body in which a reinforcing layer is embedded and can be expanded and contracted, and the water-stop member is disposed in a recess formed on the outer peripheral surface of the joint portion of the submerged box. The structure of the water-stopping material is characterized in that when the submerged box is not connected, it is folded and stored in the recess, and when connected, the cover member covering the storage part is opened to expand.   The structure of the water stop material according to claim 1, wherein the bag-like water stop member is annular.

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