JP3385376B2 - Underground water collection equipment segment and underground water collection equipment construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground water collecting facility segment and an underground structure for constructing a hollow underground water collecting facility having permeability in the ground below the sea floor, river bottom, lake bottom by the shield construction method. Concerning construction method of water collection equipment

[0002]

2. Description of the Related Art The infiltration water intake method is a method of constructing a hollow underground water collection facility with permeability in the ground below the seabed, riverbed, lake bottom, etc. The water is collected into the seawater and supplied to a seawater desalination plant, etc.In general, a water collection pipe consisting of a perforated vinyl chloride pipe or a porous concrete pipe is installed in the ground by the excavation method. Has been constructed.

[0003]

Since the above-mentioned water collection pipe has a relatively low strength and a maximum diameter of about 60 cm and a small surface area, it is necessary to install the water collection pipe long when the required water collection amount is large. There was a problem. In addition, since the water collection pipe is installed in the ground by the open-cut method, there are many problems that the work is done on the water, the work efficiency is low, the navigation of the ship is hindered, and the environment is adversely affected.

On the other hand, in the shield construction method, by constructing a lining with high-strength segments in parallel with the tunnel excavation, a tunnel having a large cross-sectional area and a large surface area can be efficiently constructed without cutting. Since the work is done inside the tunnel, the segment needs to be highly waterproof.
The performance which is contrary to the above-mentioned water collection pipe was required.

According to the present invention, a hollow underground water collection facility having a water permeability is provided in the ground below the seabed, riverbed, lake bottom, etc., and it has a large cross-sectional area, as well as a shield tunnel. Intended for construction.

[0006]

A feature of the present invention is a segment for underground water collecting equipment, which is composed of steel, reinforced concrete, etc. And a water-permeable portion on the outer surface side having a high water-permeability that is configured in a double structure, and the withstanding water stop portion has an intake hole that penetrates the withstanding water stop portion and communicates the water-permeable portion with the inner space. A water blocking lid is installed in the water intake hole so as to open due to a pressure difference between the inside and outside, and
Removable closure to prevent water lid opening
It was installed .

[0007] It is preferable that a plate-shaped partitioning part for partitioning the water-permeable part into front and back is provided. Further, it is preferable that a water-permeable protective sheet such as a woven fabric is fixed to the outer surface side so as to cover the water-permeable portion.

Further, a feature of the present invention is that in the underground water collecting equipment construction method for constructing a hollow underground water collecting equipment having water permeability in the ground below the sea floor, river floor, lake bottom, etc., by the shield construction method, While excavating the ground, assembling a plurality of segments for underground water collection equipment, the segment for underground water collection equipment, steel, strength consisting of reinforced concrete,
The pressure-resistant water-stopping portion on the inner surface side having high water-stoppage and the water-permeable portion on the outer surface side having high water-permeability made of porous concrete or the like are configured in a double structure. A water intake hole is provided through which the water permeable portion communicates with the inner space, and a water shut lid is opened in the water intake hole due to a pressure difference between the inside and the outside.
And prevent the water stop lid from opening.
The closing member is removably attached, and the internal pressure in the inner space is
Remove the closing member with the
The pressure is reduced to open the water shut-off lid, and the water permeable portion and the inner space are communicated with each other via the water intake hole.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an embodiment of the present invention and is a cross-sectional view of a segment 10 for underground water collection equipment, and FIG.
Is a vertical sectional view thereof, and FIG. 3 is a plan view of the inner surface side. FIG. 4 is an enlarged cross-sectional view of the water intake hole portion in FIG.
FIG. 6 is an exploded perspective view of the water intake pipe 14, the water blocking lid 15, and the closing member 16 in FIG. 4.

The segment 10 for underground water collecting equipment is shown in FIG.
As shown in FIG. 3, it is formed in a substantially arcuate cross-sectional shape, and a large number of segments 10, 10, ... Are joined in the horizontal direction (circumferential direction) and the vertical direction (longitudinal direction) to form a substantially cylindrical shape. It can be assembled into. Also, segment 1
The front and rear end faces of 0 are provided with a convex tenon 12A and a concave tenon 12B, and the segments 10, 10 ... are fitted with the convex tenon 12A and the concave tenon 12B to form metal fittings, metal members such as bolts. It is designed to be joined without exposing it to the outside.

The segment 10 is composed of a reinforced concrete (solid ordinary concrete) or the like having a high strength and a high water-stopping ability on the inner surface side and a water-proof portion 11 and a porous porous concrete or the like having a high water-permeability outer surface side. Water permeability part 1
It has a double structure (double layer structure) with 7.
The proof water blocking portion 11 is disposed on the entire inner surface side and the outer peripheral edge portions (front and rear ends, both end portions), and the water permeable portion 17 is
It is located in the central part on the outer surface side. Therefore, the segment 10 has the same load-bearing strength and water-stopping property as those of the ordinary shield tunnel construction segment due to the load-proof water blocking portion 11. In addition, the yield strength water blocking portion 11 is made of corrosion-resistant steel,
A composite structure made of ductile cast iron and steel concrete may be used.

In the segment 10, a plurality of substantially cylindrical water intake pipes 14, 14 made of hard vinyl chloride or the like are embedded in the water-proof portion 11 at predetermined intervals. A water intake hole is formed which penetrates the water stop portion 11 and connects the water permeable portion 17 and the inner space. The diameter and the number of the intake pipes 14 can be adjusted according to the amount of water collected.

Then, as shown in FIGS.
A water stop lid (middle lid) 15 made of plastic or the like is provided at the tip portion (inner surface side) of the water intake pipe 14 when the internal pressure is high.
It is fixed relatively weakly via the adhesive 15a so that the water intake pipe 14 is opened by dropping when the external pressure becomes higher than the internal pressure. Furthermore, a cap-shaped closing member (outer lid) 16 is provided at the tip of the water intake pipe 14 to prevent the water stoppage.
In order to prevent inadvertent removal of No. 5, the water blocking lid 15 is covered and is relatively firmly attached detachably via screws 14a and 16a.

Further, as shown in FIGS. 1 and 2, on the outer surface side of the segment 10, a water-proof plate-like partition portion 18 is provided so as to partition the water-permeable portion 17 into front and rear portions. A protective sheet 19 such as a woven fabric having a smooth surface and having water permeability is fixed to the outer surface side of 10 so as to cover the water permeable portion 17.

The segments 10 and 1 constructed in this way
In order to construct a hollow underground water collection facility with permeability in the ground below the seabed, riverbed, and lake bottom by 0 ..., the ground is excavated by the shield construction method, and a plurality of segments 10, 10 are used. Assemble ... into a substantially cylindrical shape. In this state, the segments 10, 10, ...
14 are equipped with water stop lids 15 and 15 and closing members 16 and 16.

Therefore, the segments 10, 10 ... Show sufficient load-bearing capacity and water-stopping due to the load-bearing and water-blocking portions 11, 11 ..., and can be constructed without digging as in the case of a normal shield tunnel construction. The work efficiency is high, the navigation of the ship is not hindered, and the adverse effect on the environment can be prevented. Also, since the depth can be increased, it can be constructed in the stratum where water can be collected most efficiently. Moreover, since it has a large cross-sectional area, a sufficient surface area can be secured even if the total length is short.

Further, the water-permeable portion 1 of the segments 10, 10 ...
7 and 17 are partitioned in the front and rear by partition parts 18 and 18 such as plate-like parts, so that the front part of the water-permeable part 17 is located in front of the tail seal 8 (within the shield), and after the water-permeable part 17. Even when the side portions are located behind the tail seal 8 (on the natural ground side), seawater or the like penetrates the water-permeable portion 17 (the tail seal 8).
It can be suitably prevented from entering the shield from the natural side through the inner side). Further, the water-permeable parts 17, 1
7 are covered with the protective sheets 19, 19 ..., the friction with the tail seal 8 is reduced, and the tail seal 8 can be prevented from being worn or damaged.

After the assembling of the segments 10, 10, ... Is completed, the inner space of the segments 10, 10, ... Is pressurized and the inner pressure is made higher than the outer pressure.
An operator removes the closing members 16, 16 ... Then, after the workers retreat, segment 1
The inner pressures of the inner spaces of 0, 10 ... Are lowered, and the water shutoff covers 15, 15 ...
Open up. That is, since the water shut-off lids 15, 15 ... Can be operated from the outside, the water intake pipes 14, 14 can be safely opened without performing diving work in the sealed space.

In this way, when the water intake pipes 14, 14 ... Penetrating the pressure-resistant water blocking parts 11, 11 ... Of the segments 10, 10, ... Are opened, the water permeation part 1 on the outer surface side is opened via the water intake pipes 14, 14.
7 and 17 communicate with the inner space, and the segments 10 and 1
Since 0 ... exhibits water permeability, it is possible to suitably construct a hollow underground water collection facility having water permeability. The seawater and the like that have penetrated into the ground are protected by the protective sheets 19, 1
The water is collected in the inner space of the segments 10, 10 ... through the water-permeable parts 17, 17 ... and the intake pipes 14, 14.

When seawater or the like is collected, segment 1
0, 10 ... are exposed to seawater etc., but the convex tenon 12A,
Since the recessed tenon 12B is fitted and the metal members such as the metal fittings and the bolts are joined without being exposed to the outside, it is possible to prevent the reduction of the joining strength due to the corrosion of the metal members. Further, the water-permeable parts 17, 17 ...
Since it is covered with 19 ..., Clogging can be prevented.

[0021]

INDUSTRIAL APPLICABILITY The present invention comprises a segment for underground water collecting equipment, which is composed of steel, reinforced concrete, etc., which has strength and water-stopping property on the inner surface side, and water-proof outer surface side, which is composed of porous concrete etc. It has a double structure with a water-permeable part, and the load-proof water-stopping part is provided with a water-intake hole that penetrates the power-proof water-stopping part to communicate the water-permeable part with the inner space. If you install it so that it opens due to the pressure difference between the inside and outside
In addition, the closure member that prevents the water shut lid from opening can be removed.
Leave mounted on ability before a state in which the assembly of the segments for underground water collecting equipment has high internal pressure of the inner space after the completion
Remove the closing member, then reduce the internal pressure to
Open the water shut-off lid and connect the water permeable part to the inner space via the water intake hole to create a hollow underground water collection facility with water permeability, which has a large cross-sectional area, large surface area, and is not open-cut. It is possible to construct efficiently, and to open the water intake hole safely without performing diving work, etc., and to make the water permeable part and the inner space communicate with each other through the water intake hole. The underground water collection facility can be suitably constructed.

Further, it is preferable that seawater and the like enter the shield from the natural ground side through the water permeable portion by providing a plate-shaped partitioning portion for partitioning the water permeable portion into front and rear in the segment for underground water collection equipment. Can be prevented.

Further, by clinging a water-permeable protective sheet such as a woven fabric to the outer surface of the underground water collecting equipment segment so as to cover the water-permeable portion, clogging of the water-permeable portion can be prevented. At the same time, it is possible to reduce friction with the tail seal and prevent wear and damage of the tail seal.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a segment for underground water collection equipment according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the segment for underground water collection equipment of FIG.

FIG. 3 is a plan view of an inner surface side of the segment for underground water collection equipment of FIG. 1.

FIG. 4 is an enlarged sectional view of a water intake hole portion in FIG.

5 is an exploded perspective view of a water intake pipe, a water shutoff lid, and a closing member in FIG. 4. FIG.

[Explanation of symbols]

10 Underground water collection equipment segment 11 Proofing water stop 12A convex tenon 12B concave tenon 14 Intake pipe (intake hole) 14a Male screw part 15 Water stop lid 15a adhesive 16 Closing member 16a Female screw part 17 Permeate part 18 partition 19 Protective sheet

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) E03B 3/06-3/26 E03B 3/32-3/36 E02D 29/00

Claims (4)

(57) [Claims] 1. A double structure comprising an inner surface proof water-stopping portion made of steel, reinforced concrete or the like having high strength and water blocking ability, and an outer water permeable portion having high water permeability made of porous concrete or the like, The withstanding water stop portion is provided with a water intake hole that penetrates through the withstand water stop portion and communicates the water permeable portion with the inner space, and the water stop hole is provided with a water shut lid due to an internal / external pressure difference.
It is installed so that it opens and the water-stop lid opens.
A segment for underground water collection equipment that is removably fitted with a closing member that prevents 2. The segment for underground water collecting equipment according to claim 1 , wherein a partitioning portion such as a plate-like partitioning the water-permeable portion into front and rear is provided. Wherein the outer surface side, a protective sheet having a permeability of the woven fabric or the like, according to claim 1 or 2 is secured so as to cover the permeable portion
The underground water collection equipment segment described in. 4. An underground water collection facility construction method for constructing a hollow underground water collection facility having permeability in the ground below the sea floor, river floor, lake bottom, etc., in which the ground is excavated by a shield method. , Assembling a plurality of underground water collecting equipment segments, the underground water collecting equipment segments are steel, strength made of reinforced concrete, etc. It has a double structure with a high outer surface water permeable portion, and the load bearing water blocking portion is provided with a water intake hole that penetrates the power bearing water blocking portion and communicates the water permeable portion with an inner space. the, by internal and external pressure difference between the water stop cover
Install it so that the water-stop lid opens.
An inward space is installed after the assembly of the above-mentioned underground water collection equipment segment is completed, with the closing member to prevent it being detachably attached.
Remove the closing member with the internal pressure of the
After that, the internal pressure is reduced to open the water shut-off lid, and the water permeable portion and the inner space are communicated with each other through the water intake hole.