JP4035386B2 - Groundwater drainage system for high pressure gas storage facilities in bedrock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a groundwater drainage device for a high-pressure gas storage facility in a rock that drains groundwater around the high-pressure gas storage facility in the 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 the rock mass 2, and a backfill placed in a gap between the lining material 4 and the rock mass 2 In the lining-type rock mass high-pressure gas storage facility 1 including the concrete 5, when the internal pressure in the storage tank 3 is released when performing open inspection or the like, the lining material 4 may be deformed due to the influence of groundwater pressure. Generally known.
In order to cope with this, as shown in FIG. 5 (a), the back side of the lining material 4 lined on the storage tank 3 is located inside the backfill concrete 5 constituting the high-pressure gas storage facility 1 in the rock mass. And a drain pipe 14 that collects groundwater that has flowed into the drain pipe 14.
[0003]
A plurality of the water collecting pipes 13 are arranged in each of the vertical direction and the horizontal direction along the rock wall surface 2a of the hollow portion provided 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 both intersect. In addition, the drain pipe 14 connects the two adjacent water collecting pipes 13 and is disposed along the rock wall 2a. For the purpose of covering the rock wall 2a evenly, a plurality of drain pipes 14 are provided. The drain pipes 14 are arranged in at least two intersecting directions, and the drain pipes 14 form a mesh shape. Thereby, a plane or curved surface similar to the rock wall surface 2a is formed in an area surrounded by the plurality of water collecting pipes 13.
When groundwater or the like is submerged in the backfill concrete 5, the groundwater is drained into the drainage pipe 14, and then taken into the drainage pipe 13 arranged in the horizontal direction, and further, the drainage pipe arranged in the vertical direction. The water is drained to the access tunnel portion 6 through 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 intersect each other. For this reason, as shown in B area of FIG. 5 (b), when the drainage pipe 14a is partially blocked, the drainage pipe 14a is located between the water collecting pipes 13a and 13b positioned at the upper and lower ends connected at both ends. The drainage function cannot be performed over the entire length.
Further, for example, when there is a remarkable water channel in the rock mass 2, it is conceivable that a place where a large amount of groundwater is locally submerged in the backfill concrete 5. At this time, a large amount of submerged groundwater is drained to the drain pipe 14 located at this location, but since the intersecting drain pipes 14 are not communicated with each other, the amount of drainage depends on the drainage capacity of the drain pipe 14 itself. However, when the amount of water exceeding the maximum flow rate of the drain pipe 14 is generated, there is a case where all the water cannot be drained.
[0005]
In view of the above 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]
A groundwater drainage device for a high-pressure gas storage facility in a rock according to claim 1, wherein a storage tank constructed by lining a steel lining material on a rock wall in a cavity of the rock, and a gap between the lining and the rock wall A groundwater drainage device for a high-pressure gas storage facility in a rock mass provided with backfilled concrete arranged in a section, which is disposed along the vertical rock wall surface so as to connect the vicinity of the top and bottom of the storage tank A plurality of first water collecting pipes and a plurality of second water collecting pipes that are arranged along the horizontal wall surface of the rock so as to be orthogonal to the first water collecting pipes and communicate with intersections with the first water collecting pipes. And a drainage body disposed along the rock wall surface in a region surrounded by the first water collecting pipe and the second water collecting pipe and communicating with both the first water collecting pipe and the second water collecting 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 apparatus for a high-pressure gas storage facility in a rock according to claim 2, wherein the drainage body is formed into a flat surface 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 drain pipe is modularized in a predetermined shape, and a plurality of drain pipes communicate with each other through the connection socket.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the groundwater drainage apparatus of the high-pressure gas storage facility in the rock according to the present invention will be described in detail with reference to FIGS. 1 and 3.
[0009]
As shown in FIG. 1 (a), the lining-type rock internal high-pressure gas storage facility 1 uses a hollow portion obtained by excavating the rock mass 2 in a cylindrical shape as a storage tank 3, and the rock wall surface 2a of the hollow portion is used as a storage wall 3a. The storage tank 3 is formed by lining the lining material 4, and the backfill concrete 5 is used to fill a gap between the storage tank 3 and the rock mass 2.
The storage tank 3 stores, for example, storage gas such as city gas, natural gas, and air. The lining material 4 made of steel prevents the leakage of stored gas in the storage tank 3 and It is used for the purpose of safe storage. Further, the backfill concrete 5 has a function of uniformly transmitting the storage pressure generated from the storage tank 3 to the rock mass.
[0010]
In the inside of the backfill concrete 5 of the in-bed rock high-pressure gas storage facility 1 having the above-described configuration, a groundwater drainage device 7 is provided along the rock wall 2a of the hollow portion obtained by excavating the rock 2 used as the storage tank 3 into a cylindrical shape. The groundwater drainage device 7 is constructed of 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 a hollow pipe such as a steel pipe or a vinyl chloride pipe, and is disposed 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, When viewed from the top of the storage tank 3, a plurality of them are spaced apart at a certain angle. In the present embodiment, the three first water collecting pipes 8 are laid every 180 °, but this is not particular, and the scale of the high-pressure gas storage facility 1 in the bedrock, the situation of the surrounding groundwater, etc. Depending on the situation, it is adjusted appropriately.
Similarly to the first water collection pipe 8, the second water collection pipe 9 is also made of a hollow pipe such as a steel pipe or a vinyl chloride pipe, and the horizontal wall surface of the rock is perpendicular to the first water collection pipe 8. A plurality are arranged along the 2a and spaced apart with a predetermined interval in the vertical direction. Note that the first water collecting pipe 8 and the second water collecting pipe 9 communicate with each other at portions intersecting each other.
[0012]
Further, a drainage body 10 is disposed in a region surrounded by the first water collection pipe 8 and the second water collection pipe 9, and the drainage body 10 is constituted by the plurality of drainage pipes 11 and the connection socket 12. Has been. As shown in FIG. 1 (b), the drainage pipe 11 is composed of a short hollow pipe whose shape is modularized, and the outer peripheral surface has a plurality of holes for taking in groundwater. ing. In the present embodiment, a net-like tube whose peripheral surface generally used in a drainage facility or the like is formed in a mesh shape is used as the drainage tube 11, but this is not particular and is shown in FIG. 2 (a). A reticulated tube formed into a tubular shape by adhering a reticulated material to the inner peripheral surface of the spirally formed core material, or a plurality of rings arranged in parallel as shown in FIG. Any tubular body having a structure having a plurality of holes on its peripheral surface, such as a tubular body having a high pressure resistance, which is integrally formed into a tubular shape by weaving 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 the drain pipe 11 with the first water collecting pipe 8 and the second water collecting pipe 9 in communication with each other. A plurality of connection ports 12a are provided.
A plurality of connection ports 8 a and 9 a for connecting to the drainage pipe 11 through connection sockets 12 are provided on the outer peripheral surfaces of the first water collection pipe 8 and the second water collection pipe 9, respectively. The cross-sectional diameters of the connection ports 8 a and 9 a are manufactured to the same diameter as the drain pipe 11. Thus, the connection port 12a of the connection socket 12 may be manufactured only to a diameter that fits the drain pipe 11, and the number and the mounting angle thereof may be any shape. In the present embodiment, it is assumed that a plurality of connection sockets 12 are prepared in which changes are made to the number, attachment angle, attachment position, and the like of the connection ports 12a.
[0013]
In this way, the drainage body 10 has a desired configuration as shown in FIG. 1B by continuing the configuration in which the drainage pipe 11 is fitted to the connection port 12a of the connection socket 12 at its end. It is formed on a mesh-like surface having a size and a desired shape. The drainage body 10 has an end of a drainage pipe 11 located at an edge thereof and connection ports 8a and 9a of the first water collection pipe 8 and the second water collection pipe 9 via the connection socket 12. As shown in FIG. 1 (a), they are laid in a region surrounded by the first water collecting pipe 8 and the second water collecting pipe 9.
At this time, the drainage body 10 formed in a mesh-like curved surface or plane is manufactured in the same shape as the rock wall surface 2a in the region surrounded by the first water collecting pipe 8 and the second water collecting 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 the 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 drainage pipe 11 using a connection socket 12 having a suitable shape.
In the present embodiment, the drainage body 10 is manufactured in a mesh-like curved surface or plane. However, the drainage body 10 is not particularly limited to this, and can cover the entire lining material 4 and can efficiently backfill the lining material 4. Any shape may be used as long as it can take in groundwater to be immersed in the concrete 5.
[0014]
With such a configuration, the entire surface of the lining material 4 lined in the storage tank 3 of the in-rock high-pressure gas storage facility 1 is covered with the groundwater drainage device 7 provided along the rock wall surface 2a. . These groundwater drainage devices 7 take groundwater flowing into the backfill concrete into the drainage pipe 11 constituting the drainage body 10, and the groundwater taken into the drainage pipe 11 is the first water collecting pipe 8 or After being sent out to the second water collecting pipe 9, the water is drained to the access tunnel section 6 connected at the bottom of the storage tank 3.
[0015]
According to the configuration described above, the lining material 4 lined on the storage tank 3 of the in-bed rock high-pressure gas storage facility 1 is 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, since the groundwater that has entered the backfill concrete 5 can be drained by the groundwater drainage device 7, it is possible to prevent deformation of the lining material 4 caused by the action of the groundwater pressure. Become.
In addition, in the backfill concrete 5, even when a portion where the amount of groundwater to be locally submerged is large, the drainage body 10 is drained over the entire surface because the adjacent drainage pipes 11 are networked. Therefore, a large amount of groundwater can be drained without being influenced by the drainage limit of the drainage pipe 11 itself.
[0016]
Since the drainage body 10 constituting the groundwater drainage device 7 is formed by unitizing the modular drainage pipe 11 and the connection socket 12, it is easy to transport and store and has good handling properties. The installation work on the wall surface is easy and can greatly contribute to the reduction of construction cost and the construction period.
Further, since the drainage body 10 is connected so that adjacent drainage pipes 11 communicate with each other via a connection socket 12, and is formed in a network-type mesh-like curved surface or plane, it is shown in FIG. Even when the drainage pipe 11 is partially blocked, as in part A, the part that loses the drainage function is only a part sandwiched between the connection sockets 12, and drainage using other adjacent paths. Therefore, it becomes possible to maintain the drainage function of the groundwater drainage device 7 itself.
[0017]
Furthermore, since the drainage body 10 can form a desired curved surface or plane with a simple configuration using an appropriate number of drain pipes 11 and an appropriately shaped connection socket 12, the top and bottom of the storage tank 3 are in the vicinity. It is possible to easily provide the drainage body 10 even in complicated shapes such as the dome-shaped portion of the tank, and it is possible to construct the drainage body 10 with high accuracy with the minimum number of parts without depending on the shape or part of the storage tank 3 itself. Costs can be significantly reduced.
In addition, if several types of connection sockets 12 having different shapes are manufactured by changing the connection angles and arrangement positions of the plurality of connection ports 12a provided in the connection socket 12, by properly using them, It is possible to cope with the unevenness of the rock wall 2a relatively easily, and the drainage body 10 can be installed in close contact with the excavation cross section.
[0018]
The drainage body 10 formed by assembling a unit using a rigid material for the drainage pipe 11 and the connection socket 12 has a so-called truss structure after assembly. It is possible to reduce the number of fixing points to 2a.
[0019]
【The invention's effect】
According to the groundwater drainage system for a high-pressure gas storage facility in a rock according to claim 1, a storage tank constructed by lining a rock lining material on a rock wall in a cavity of the rock, the lining material and the rock wall A groundwater drainage device for a high-pressure gas storage facility in bedrock with backfilled concrete arranged in the void of the tank, arranged along the bedrock wall surface in the vertical direction so as to connect the vicinity of the top and bottom of the storage tank A plurality of first water collecting pipes, and a plurality of first water collecting pipes that are disposed along the rock wall surface in the horizontal direction so as to be orthogonal to the first water collecting pipes and communicate with the intersections with the first water collecting pipes. A second water collecting pipe, and an area surrounded by the first water collecting pipe and the second water collecting pipe are disposed along the rock wall surface, and communicated with both the first water collecting pipe and the second water collecting pipe. It is constituted by a drainage body, and the drainage body has a plurality of outer peripheral surfaces. It consists of a mesh-like plane or curved surface formed by arranging a plurality of drain pipes in at least two intersecting directions, and the intersecting drain pipes communicate with each other, so 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, deformation of the lining material caused by the action of the groundwater pressure can be prevented.
[0020]
In addition, in the backfill concrete, even when there is a place where there is a large amount of groundwater to be locally submerged, the drainage body is networked between adjacent drainage pipes, and the entire surface is drained. A large amount of groundwater can be drained without being influenced by the drainage limit of the drainage pipe itself.
.
[0021]
According to the groundwater drainage device for a high-pressure gas storage facility in a rock according to claim 2, the drainage body is flattened or curved by a plurality of connection sockets connecting the plurality of drainage pipes in addition to the plurality of drainage pipes. The drainage pipe is molded into a predetermined shape and is modularized, and a plurality of drainage pipes communicate with each other through the connection socket, so that it is easy to transport and store and has good handling properties. Therefore, the installation work on the wall surface is easy, and it can greatly contribute to the reduction of the construction cost and the construction period.
Further, since the drainage body is connected so that adjacent drainage pipes communicate with each other via a connection socket, and is formed in a network-type mesh-like curved surface or plane, the drainage pipe is partially blocked. Even in this case, the part that loses the drainage function is only a part sandwiched between the sockets for connection, and drainage using other adjacent paths is possible. Can be maintained.
[0022]
Furthermore, since the drainage body can form a desired curved surface or plane with a simple configuration using an appropriate number of drainage pipes and an appropriately shaped connection socket, the dome-shaped portions near the top and bottom of the storage tank It is possible to easily install drainage bodies even in complicated shapes such as, and it is possible to construct a precise drainage body with the minimum number of parts without depending on the shape and part of the storage tank itself, greatly reducing costs. It becomes possible.
In addition, if the connection angle and position of the multiple connection ports provided in the connection socket are changed, and several types of connection sockets with different shapes are manufactured, the rock wall surface It is possible to cope with the unevenness of the surface relatively easily, and the drainage body can be installed in close contact with the excavation cross section.
[0023]
The drainage body formed by assembling a unit using a rigid material for the drainage pipe and the connection socket has a so-called truss structure after assembly. It is possible to reduce the number of fixing points.
[Brief description of the drawings]
FIG. 1 is a view showing a groundwater drainage device for a high-pressure gas storage facility in a rock according to the present invention.
FIG. 2 is a diagram showing a groundwater drainage device for a high-pressure gas storage facility in a rock according to the present invention.
FIG. 3 is a schematic diagram 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 view showing a groundwater drainage device of a conventional high pressure gas storage facility in a 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 collection pipe 8a Connection port 9 Second water collection pipe 9a Connection port 10 Drainage body 11 Drainage pipe 12 Socket for connection 12a Connection port 13 Drain pipe 14 Drain pipe

Claims (2)

A high-pressure gas storage facility in a rock mass comprising a storage tank constructed by backing a steel lining material on the rock wall surface in the cavity of the rock mass, and backfilled 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 bottom of the storage tank;
A plurality of second water collecting pipes arranged along the rock wall surface in the horizontal direction so as to be orthogonal to the first water collecting pipes and communicating with intersections with the first water collecting pipes;
Arranged along the rock wall surface in a region surrounded by the first water collecting pipe and the second water collecting pipe, and constituted by a drainage body communicating with both the first water collecting pipe and the second water collecting pipe,
The drainage body is formed of a mesh-like plane or curved surface formed by arranging a plurality of drainage pipes having a plurality of holes on the outer peripheral surface in at least two intersecting directions, and the intersecting drainage pipes communicate with each other. A groundwater drainage device for high-pressure gas storage facilities in bedrock. A groundwater drainage device for a high-pressure gas storage facility in a rock according to claim 1,
The drainage body is formed into a flat surface or a curved surface by a plurality of connection sockets connecting the plurality of drainage pipes in addition to the plurality of drainage pipes,
A groundwater drainage apparatus for a high-pressure gas storage facility in a rock mass, wherein the drainage pipe is modularized into a predetermined shape, and a plurality of drainage pipes are communicated with each other through the connection socket.

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