JP2004019919A - Ground water draining device for high-pressure gas storage facility in base rock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ground water draining device for a high-pressure gas storage facility in base rock excellent in workability, low in cost, and excellent in drainage performance. <P>SOLUTION: A plurality of first water collecting pipes 8 are disposed along a vertical rock wall surface 2a so that the areas near the top and bottom parts of a storage tank 3 are connected to each other, and spaced apart specified distances from each other at a specified angle as viewed from the top part of the storage tank 3. A plurality of second water collecting pipes 9 are disposed along a horizontal rock wall surface 2a in the state of crossing the first water collecting pipes 8 and apart specified distances from each other in vertical direction. A drainage body 10 is disposed in an area surrounded by the first water collecting pipe 8 and the second water collecting pipe 9, and a water drainage pipe 11 is formed in a net-like surface continuously having such a structure that the end part thereof is fitted to the connection port 12a of a connection socket 12. The water drainage body 10 is formed such that the end part of the drainage pipe 11 at the edge part of the drainage body 10 is connected to the connection ports 8a and 9a of the first water collecting pipe 8 and the second water collecting pipe 9 through the connection socket 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a groundwater drainage device for a high-pressure gas storage facility in rock that drains groundwater around the high-pressure gas storage facility in rock.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4, a storage tank 3 constructed by lining a steel lining material 4 in a hollow portion of a bedrock 2, and a backfill disposed in a gap between the lining material 4 and the bedrock 2. When the internal pressure in the storage tank 3 is released when performing an open inspection or the like in the lining-type high-pressure gas storage facility 1 in the lining provided with the concrete 5, the lining material 4 may be deformed under the influence of the groundwater pressure. Generally known.
In order to cope with this, as shown in FIG. 5A, the back of the lining material 4 lined with the storage tank 3 is provided inside the backfill concrete 5 constituting the high-pressure gas storage facility 1 in the rock. And a water collecting pipe 13 for collecting groundwater flowing into the drain pipe 14.
[0003]
A plurality of the water collecting pipes 13 are arranged in a vertical direction and a horizontal direction, respectively, along the rock wall surface 2a of a hollow portion formed by excavating the rock 2 used as the storage tank 3. The water collecting pipes 13 arranged in the horizontal direction communicate with each other at a portion where they intersect. The drain pipe 14 connects the two adjacent water collecting pipes 13 and is arranged along the rock wall surface 2a. However, in order to cover the rock wall surface 2a evenly, a plurality of drain pipes 14 are provided. The drain pipes 14 are arranged in at least two directions crossing each other, and the drain pipes 14 form a mesh shape. Thereby, a plane or a curved surface similar to the rock wall surface 2a is formed in a region surrounded by the plurality of water collecting pipes 13.
When groundwater or the like is flooded in the backfill concrete 5, the groundwater is drained to the drainage pipe 14, then taken in the horizontally arranged water collection pipes 13, and further vertically collected water collection pipes. The waste water is drained to the access tunnel section 6 through the switch 13.
[0004]
[Problems to be solved by the invention]
However, although the water collecting pipe 13 and the drain pipe 14 communicate with each other at the connecting portion, the drain pipes 14 do not communicate with each other at a portion where they cross each other. For this reason, as shown in the area B of FIG. 5B, when a part of the drainage pipe 14a is blocked, the drainage pipe 14a is connected between the upper and lower water collecting pipes 13a and 13b connected at both ends. The drainage function cannot be performed over the entire length.
Further, for example, when there is a remarkable water path in the bedrock 2, it is conceivable that a part where a large amount of groundwater is locally flooded in the backfill concrete 5. At this time, the groundwater that has been flooded in a large amount is drained to the drainpipe 14 located at this location, but since the intersecting drainpipe 14 is not connected, the amount of drainage depends on the drainage capacity of the drainpipe 14 itself. However, when the amount of water that exceeds the maximum flow rate of the drain pipe 14 is generated, it may not be possible to drain all of the water.
[0005]
In view of the above-mentioned circumstances, an object of the present invention is to provide a groundwater drainage device for a high-pressure gas storage facility in a rock that has good workability, is inexpensive, and has good drainage performance.
[0006]
[Means for Solving the Problems]
The underground water drainage device for a high-pressure gas storage facility in rock according to claim 1, wherein a storage tank constructed by lining a steel lining material on a rock wall surface in a hollow portion of the rock, and a gap between the lining material and the rock wall surface A groundwater drainage device for a high pressure gas storage facility in a rock mass provided with backfill concrete disposed in a portion, wherein the ground water drain device is disposed along the rock wall surface in a vertical direction so as to connect near a top portion and a bottom portion of the storage tank. A plurality of first water collecting pipes and a plurality of second water collecting pipes are arranged along the rock wall surface in a horizontal direction so as to be orthogonal to the first water collecting pipes, and the intersections of the first water collecting pipes communicate with each other. And a drainage body disposed along the rock wall surface in an area surrounded by the first water collection pipe and the second water collection pipe, and communicating with both the first water collection pipe and the second water collection pipe The drainage body has a plurality of holes on the outer peripheral surface. That the drain pipe, made of a mesh-like planar or curved surface which is formed with a plurality disposed in two directions at least intersect, drainage pipes each other crossing is characterized by being communicated.
[0007]
The groundwater drainage device for a high-pressure gas storage facility in rock according to claim 2, wherein the drainage body is formed into a flat surface or a curved surface by a plurality of drainage pipes and a plurality of connection sockets connecting the plurality of drainage pipes. The drain pipe is modularized into a predetermined shape, and a plurality of drain pipes communicate with each other via the connection socket.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a groundwater drainage device for a high-pressure gas storage facility in a rock according to the present invention will be described in detail with reference to FIGS.
[0009]
As shown in FIG. 1A, a lining type high-pressure gas storage facility 1 in a rock uses a hollow portion obtained by excavating a rock 2 in a cylindrical shape as a storage tank 3. It comprises a storage tank 3 formed by lining a lining material 4 and a backfill concrete 5 filling a gap between the storage tank 3 and the bedrock 2.
The storage tank 3 is for storing a storage gas such as city gas, natural gas, and air. The lined steel lining material 4 prevents the storage gas in the storage tank 3 from leaking. Is used for the purpose of safe storage. The backfill concrete 5 has a function of uniformly transmitting the storage pressure generated from the storage tank 3 to the bedrock.
[0010]
Inside the backfill concrete 5 of the high-pressure gas storage facility 1 in the rock having the above-described configuration, a groundwater drainage device 7 is provided along the rock wall 2a of the hollow portion where the rock 2 used as the storage tank 3 is excavated into a cylindrical shape. The groundwater drainage device 7 includes a first water collection pipe 8, a second water collection pipe 9, and a drainage body 10 including a drainage pipe 11 and a connection socket 12.
[0011]
The first water collecting pipe 8 is formed of a hollow pipe such as a steel pipe or a vinyl chloride pipe, and is arranged along the rock wall surface 2a in the vertical direction so as to connect the vicinity of the top and the bottom of the storage tank 3 with each other. When viewed from the top of the storage tank 3, a plurality of storage tanks 3 are spaced apart from each other at a certain angle. In the present embodiment, three first water collecting pipes 8 are laid every 180 °. However, the present invention is not limited to this, and the scale of the high-pressure gas storage facility 1 in the rock, the state of the surrounding groundwater, and the like are not limited. Are appropriately adjusted according to the conditions.
The second water collecting pipe 9 is also made of a hollow pipe such as a steel pipe or a vinyl chloride pipe, like the first water collecting pipe 8, and the rock wall surface in the horizontal direction is orthogonal to the first water collecting pipe 8. 2a, and a plurality of them are arranged at predetermined intervals in the vertical direction. Note that the first water collection pipe 8 and the second water collection pipe 9 communicate with each other at portions that cross each other.
[0012]
Further, in a region surrounded by the first water collecting pipe 8 and the second water collecting pipe 9, a drainage body 10 is arranged, and the drainage body 10 includes a plurality of the drainage pipes 11 and connection sockets 12. Have been. As shown in FIG. 1B, the drain pipe 11 is formed of a hollow pipe having a short length with a modularized shape, and a plurality of holes for taking in groundwater are provided on the outer peripheral surface. ing. In the present embodiment, a mesh pipe whose peripheral surface is generally formed in a mesh shape is used for the drain pipe 11 as the drain pipe 11. However, the present invention is not limited to this and is shown in FIG. As shown in FIG. 2 (b), a net-like tube formed by fixing a net material to the inner peripheral surface of a spiral shaped core material and connecting a plurality of rings arranged in parallel as shown in FIG. Any tube having a structure having a plurality of holes on the peripheral surface, such as a tube having a high pressure resistance and integrally formed into a tube by braiding a linear core material, may be used. The connection socket 12 is used for the purpose of connecting the plurality of drain pipes 11 or connecting the drain pipes 11 with the first water collecting pipe 8 and the second water collecting pipe 9. And a plurality of connection ports 12a.
In addition, a plurality of connection ports 8 a and 9 a for connecting to the drain pipe 11 via a connection socket 12 are provided on the outer peripheral surfaces of the first water collection pipe 8 and the second water collection pipe 9, respectively. The connection ports 8a and 9a have the same cross-sectional diameter as the drain pipe 11. Thus, the connection port 12a of the connection socket 12 may be manufactured only to have a diameter that fits into the drain pipe 11, and the number and the mounting angle may be any shape. In the present embodiment, a plurality of connection sockets 12 in which the number, the mounting angle, the mounting position, and the like of the connection ports 12a are changed are prepared.
[0013]
As described above, the drainage body 10 has a configuration in which the end of the drainage pipe 11 is fitted to the connection port 12a of the connection socket 12 so that a desired configuration as shown in FIG. It is formed on a mesh-like surface having a size and a desired shape. The drainage body 10 connects the end of the drainage pipe 11 located at the edge thereof and the connection ports 8a, 9a of the first water collection pipe 8 and the second water collection pipe 9 via the connection socket 12. As shown in FIG. 1A, they are laid in a region surrounded by the first water collection pipe 8 and the second water collection pipe 9.
At this time, the drainage body 10 formed into a mesh-like curved surface or a flat surface is manufactured to have the same surface shape as the rock wall surface 2a in a region surrounded by the first water collection pipe 8 and the second water collection pipe 9. Is done. In such a configuration, several types of connection sockets 12 having different shapes with various changes in the attachment angle and arrangement interval of the connection port 12a are manufactured in advance, and according to the uneven shape of the rock wall surface 2a, It can be manufactured by connecting the drain pipe 11 using a connection socket 12 having a suitable shape.
In the present embodiment, the drainage body 10 is manufactured to have a mesh-like curved surface or a flat surface. However, the present invention is not limited to this. The drainage body 10 can cover the entire lining material 4 and the backfill can be efficiently performed. Any shape may be used as long as it can take in groundwater that is submerged in the concrete 5.
[0014]
With this configuration, the entire surface of the lining material 4 lined with the storage tank 3 of the in-rock high-pressure gas storage facility 1 is covered by the groundwater drainage device 7 provided along the rock wall surface 2a. . These groundwater drainage devices 7 take in groundwater that has flowed into the backfill concrete into a drainage pipe 11 that constitutes the drainage body 10, and transfer the groundwater that has been taken into the drainage pipe 11 to the first water collection pipe 8 or a second drainage pipe. After being sent to the second water collection pipe 9, the water is drained to the access tunnel 6 connected at the bottom of the storage tank 3.
[0015]
According to the above-described configuration, the lining material 4 lined with the storage tank 3 of the in-rock high-pressure gas storage facility 1 is entirely covered with the groundwater drainage device 7 provided along the rock wall surface 2a. Therefore, even when the internal pressure of the storage tank 3 is released, the groundwater that has infiltrated the backfill concrete 5 can be drained by the groundwater drainage device 7, so that deformation of the lining material 4 caused by the action of the groundwater pressure can be prevented. Become.
Also, in the case of the backfill concrete 5, even in a case where there is a place where the amount of groundwater that is locally flooded is large, the drainage body 10 is configured such that the drainage pipes 11 adjacent to each other are networked to drain the entire surface. Therefore, a large amount of groundwater can be drained without being affected by the drainage limit of the drain pipe 11 itself.
[0016]
Since the drainage body 10 constituting the groundwater drainage device 7 is formed by unitizing the modularized drainage pipe 11 and the connection socket 12, the transport and storage are easy, and the handling property is good. The installation work on the wall is easy, and it can greatly contribute to the reduction of the construction cost and the construction period.
The drainage body 10 is shown in FIG. 3 because adjacent drainage pipes 11 are connected so as to communicate with each other via a connection socket 12 and are formed in a network-shaped mesh-like curved surface or flat surface. Even when the drain pipe 11 is partially blocked, as in part A, the part that loses the drain function is only a part sandwiched between the connection sockets 12 and drains using another adjacent route. Therefore, the drainage function of the groundwater drainage device 7 itself can be maintained.
[0017]
Furthermore, since the drainage body 10 can form a desired curved surface or flat surface with a simple configuration using an appropriate number of drainage pipes 11 and connection sockets 12 of an appropriate shape, the vicinity of the top and bottom of the storage tank 3 It is possible to easily provide the drainage body 10 even in a portion having a complicated shape such as a dome-shaped portion of the storage tank 3, and it is possible to construct the accurate drainage body 10 with the minimum number of parts without depending on the shape and the portion of the storage tank 3 itself. Thus, the cost can be significantly reduced.
In addition, by changing the connection angle, the arrangement position, and the like of the plurality of connection ports 12a provided in the connection socket 12, if several types of connection sockets 12 having different shapes are manufactured, these can be used properly. It is possible to relatively easily cope with the unevenness of the rock wall surface 2a and the like, and the drainage body 10 can be constructed in close contact with the excavated cross section.
[0018]
The drainage body 10 formed by assembling the unit using a rigid material for the drainage pipe 11 and the connection socket 12 has a so-called truss structure when assembled, and the rock wall surface is formed by the self-sustainability of the material itself. It is possible to reduce the number of fixing portions to 2a.
[0019]
【The invention's effect】
According to the underground water drainage device of the high pressure gas storage facility in the rock according to claim 1, a storage tank constructed by lining a steel lining material on a rock wall surface in a hollow portion of the rock, and the lining material and the rock wall surface A groundwater drainage device for a high-pressure gas storage facility in a rock mass provided with backfill concrete disposed in a void portion of the storage tank, wherein the drainage device is disposed along a vertical wall surface of the rock mass so as to connect a vicinity of a top portion and a bottom portion of the storage tank. A plurality of first water collection pipes, and a plurality of first water collection pipes, which are arranged along the rock wall surface in a horizontal direction so as to be orthogonal to the first water collection pipes, and at which intersections with the first water collection pipes are communicated. A second water collecting pipe, and a region surrounded by the first water collecting pipe and the second water collecting pipe, which is arranged along the rock wall surface and communicates with both the first water collecting pipe and the second water collecting pipe. A drain body, wherein the drain body has a plurality of Drain pipes having a mesh-shaped flat surface or curved surface formed by arranging a plurality of drain pipes at least in two directions intersecting each other, since the intersecting drain pipes are communicated with each other, even when the internal pressure of the storage tank is released, Since the groundwater that has entered the backfill concrete can be drained by the groundwater drainage device, it is possible to prevent deformation of the lining material caused by the action of the groundwater pressure.
[0020]
In addition, in the backfill concrete, even when a location where the amount of groundwater that is locally flooded occurs, the drainage body is networked between adjacent drainage pipes, so that the entire surface is drained, A large amount of groundwater can be drained without being affected by the drainage limit of the drainpipe itself.
.
[0021]
According to the groundwater drainage device for a high-pressure gas storage facility in rock according to claim 2, the drainage body is formed into a flat surface or a curved surface by a plurality of connection sockets connecting the plurality of drainage tubes in addition to the plurality of drainage tubes. The drainage pipe is formed into a module having a predetermined shape, and a plurality of drainage pipes are communicated with each other through the connection socket, so that transport and storage are easy and handling properties are good. Therefore, the installation work on the wall surface is easy, and it is possible to greatly contribute to the reduction of the construction cost and the construction period.
Further, the drainage body is connected so that adjacent drainage pipes communicate with each other via a connection socket, and is formed on a network-type mesh-like curved surface or flat surface, so that the drainage pipe is partially blocked. Even in the case where the drainage function is lost, the part that loses the drainage function is only a part sandwiched between the connection sockets, and the drainage function using the other adjacent route is possible. It can be maintained.
[0022]
Further, since the drainage body can form a desired curved surface or flat surface with a simple configuration using an appropriate number of drainage pipes and a connection socket of an appropriate shape, a dome-shaped portion near the top and bottom of the storage tank. It is possible to easily install drainage bodies even in parts with complicated shapes such as, etc., it is possible to construct an accurate drainage body with the minimum parts without depending on the shape and part of the storage tank itself, greatly reducing costs It becomes possible.
In addition, by changing the connection angles and arrangement positions of the plurality of connection ports provided in the connection sockets and manufacturing several types of connection sockets having different shapes, the rock wall surface can be selectively used. It is possible to relatively easily cope with the unevenness of the pit, and the drainage body can be constructed in close contact with the excavated cross section.
[0023]
The drainage body formed by assembling the unit using a rigid material for the drainage pipe and the connection socket has a so-called truss structure after assembling. The number of fixing points can be reduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing a groundwater drainage device for a high-pressure gas storage facility in rock according to the present invention.
FIG. 2 is a diagram showing a groundwater drainage device for a high-pressure gas storage facility in rock according to the present invention.
FIG. 3 is a diagram showing a schematic view of a groundwater drainage device according to the present invention.
FIG. 4 is a diagram showing a conventional high-pressure gas storage facility in rock.
FIG. 5 is a diagram showing a conventional groundwater drainage device for a high-pressure gas storage facility in rock.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 High-pressure gas storage facility in bedrock 2 Bedrock 3 Storage tank 4 Lining material 5 Backfill concrete 6 Access tunnel part 7 Groundwater drainage device 8 First water collecting pipe 8a Connection 9 Second water collecting pipe 9a Connection 10 Water drain 11 Drain pipe 12 Connection socket 12a Connection port 13 Water collecting pipe 14 Drain pipe

Claims (2)

A storage tank constructed by lining a steel lining material on the rock wall surface in the rock part cavity, and a high-pressure gas storage facility in the rock that includes backfill concrete arranged in the gap between the lining material and the rock wall surface A groundwater drainage device,
A plurality of first water collecting pipes arranged along the rock wall surface in the vertical direction so as to connect the vicinity of the top and the bottom of the storage tank;
A plurality of second water collection pipes that are arranged along the bedrock wall surface in a horizontal direction so as to be orthogonal to the first water collection pipes and that communicate with intersections with the first water collection pipes;
A first drainage pipe and a second drainage pipe are arranged along the bedrock wall surface in a region surrounded by the bedrock, and are constituted by a drainage body communicating with both the first drainage pipe and the second drainage pipe;
The drainage body has a drainage pipe having a plurality of holes on an outer peripheral surface, and is formed of a mesh-shaped flat surface or a curved surface formed by arranging a plurality of drainage pipes in at least two directions intersecting with each other. Features Groundwater drainage equipment for high pressure gas storage facilities in rock. A groundwater drainage device for a high-pressure gas storage facility in rocks according to claim 1,
The drainage body is formed into a plane or a curved surface by a plurality of connection sockets connecting the plurality of drainage pipes, in addition to the plurality of drainage pipes,
The drainage pipe is modularized into a predetermined shape, and a plurality of drainage pipes are communicated with each other via the connection socket.

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