JP2001171812A - Storage facility in rock and its construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage facility in a rock mass which is low-cost and prevents local distortion to a container body even when a local crack occurs in a surrounding rock mass and a construction method thereof. thing. SOLUTION: A storage facility 1 in a rock mass excavates and forms a cavity 2 in a rock mass in a rock mass 9, a thin steel container body (airtight material) 3 is provided in the cavity 2 in the rock mass, and a periphery of the container body 3 is provided. In this structure, the insulating material 5 is provided, and the backfill concrete 7 is provided between the insulating material 5 and the rock 9. The thin steel container 3 is fixed to the backfill concrete 7 with the slide type anchor 6. The anchor 6 is formed by the support portion 51, the slide portion 53, and the slide receiver 55. The sliding anchor 6 is slidable in the container body surface direction with respect to the container body 3 and the backfill concrete 7 surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-rock storage facility for storing high-pressure gas in a rock and a construction method thereof.

[0002]

2. Description of the Related Art Conventionally, in a non-water-sealed rock storage facility for storing high-pressure gas such as natural gas, in order to maintain gas tightness, a flexible container (such as steel) is provided on the inner surface of a cavity in the rock. (Airtight material). The support structure of this flexible container body is either self-supporting using a thick material or a sufficient number of anchors (thin materials) so that it does not fall into the cavity during construction or when no internal pressure is applied. Container support member)
A method of fixing to backfill concrete has been considered.

Further, in order to prevent local cracks generated in the surrounding rock from locally propagating to the container body through backfill concrete, a technique of arranging an insulating material therebetween has been considered. As the insulating material, a deformable flexible material is used.

[0004]

However, in the method of fixing the container body by the anchor, if the number of anchors is reduced and the container body is made independent, the container body becomes thicker and the construction cost increases. Also, in the method of fixing thin-walled materials with anchors, the number of anchors increases, and it is difficult to absorb large displacement due to cracks generated in surrounding rock due to internal pressure load and entered backfill concrete between short anchors, Local distortion may be concentrated on the container.

[0005] In the technique of preventing local distortion of a container body by an insulating material, a crack in a rock mass caused by an internal pressure load applies a shearing force to the insulating material via backfill concrete. Since the insulating material is a viscoelastic material, its material characteristics have speed dependence. If the strain rate is too high, the apparent rigidity of the insulating material will increase and the insulating material itself will not break down, and the insulating material may peel off from the backfill concrete. Excessive local strain may concentrate on the container.

Further, the container and the backfill concrete in contact with the broken insulating material may have a direct contact between the container and the backfill concrete when the internal pressure is applied again.
Local strain of backfill concrete may propagate to the container due to frictional force.

[0007] The present invention has been made in view of such a problem, and an object of the present invention is to provide a low cost, local cracking method for a container body even when a local crack occurs in surrounding rock. It is an object of the present invention to provide an in-rock storage facility for preventing a large distortion and a construction method thereof.

[0008]

Means for Solving the Problems To achieve the above-mentioned object, a first invention is a storage facility in a rock mass provided in a cavity formed in the rock mass, wherein an insulating material is provided around a container body. A backfill concrete is provided between the insulating material and the bedrock, and a slidable anchor is provided between the backfill concrete and the container body.

According to a second aspect of the present invention, a cavity is formed in a bedrock, a backfill concrete is poured into the cavity, an insulating material and a container are provided, and a space between the backfill concrete and the container is provided. A method for constructing a storage facility in a rock mass, characterized in that a slidable anchor is provided in the storage facility.

[0010] A third invention is a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein a first backfill concrete, a first insulating material, 2 is a storage facility in rock mass, which is provided with 2 backfill concrete, a second insulating material, and a container.

[0011] A fourth invention is a method for constructing a storage facility in a bedrock provided in a cavity formed in the bedrock,
A method of constructing a storage facility in a rock mass, comprising providing a first backfill concrete, a first insulating material, a second backfill concrete, a second insulating material, and a container body from the outside in the cavity. is there.

According to a fifth aspect of the present invention, there is provided a storage facility in a rock mass provided in a cavity formed in the rock mass, wherein backfill concrete, a plurality of insulating materials, and a container body are provided in the cavity from the outside. It is a storage facility in rock mass.

According to a sixth aspect of the present invention, there is provided a method of constructing a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein the concrete, a plurality of insulating materials, and a container are buried in the cavity from the outside. A method for constructing a storage facility in rock mass, characterized by providing a body.

According to a seventh aspect of the present invention, there is provided a storage facility in a rock mass provided in a cavity formed in the rock mass, wherein backfill concrete, a plurality of layers of high rigidity and friction of the surface are provided in the cavity from the outside. An in-rock storage facility characterized by providing an insulating material and a container having low resistance.

An eighth invention is a method of constructing a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein the concrete is backfilled from outside and the rigidity of a plurality of layers is high in the cavity. An installation method for a storage facility in a rock, characterized by providing an insulating material and a container body having a small frictional resistance on the surface.

According to a ninth invention, there is provided a rock storage facility provided in a cavity formed in a rock, wherein a backfill concrete, a waterproof material, and a container body are provided in the cavity from outside. A storage facility in rock, characterized in that a liquid is sealed between a waterproof material and the container.

A tenth aspect of the present invention is a method for constructing a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein backfill concrete, a waterproof material, and a container body are externally inserted into the cavity. A method for constructing a storage facility in a bedrock, wherein a liquid is sealed between the waterproof material and the container.

According to an eleventh invention, there is provided a rock storage facility provided in a cavity formed in the rock, wherein the first backfill concrete, the first insulating material, A first container, a second insulating material, a second backfill concrete, a third insulating material, a second container, and a leak that collects gas leaked into the second backfill concrete. This is a storage facility in rock mass, which is provided with a collection pipe.

A twelfth aspect of the present invention is a method for constructing a storage facility in a rock mass provided in a cavity formed in a rock mass, the method comprising: Insulating material, first container body, second insulating material, second
A storage facility in a rock mass, comprising: a backfill concrete, a third insulating material, and a second container body, and a leak collecting pipe for collecting gas leaked into the second backfill concrete. Construction method.

A thirteenth invention is a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein backfill concrete is provided in the cavity, and an anchor and an electromagnet are provided in the backfill concrete. A container body is provided inside the backfill concrete, a member receiving a magnetic force is provided on the container body, and when the electromagnet operates, the electromagnet and the member are attracted, and the container body is fixed to the backfill concrete. The storage facility in a rock mass, wherein the container body is not fixed to the backfill concrete when the electromagnet is not operated.

According to a fourteenth aspect of the present invention, there is provided a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein backfill concrete is provided in the cavity, and an anchor is provided in the backfill concrete. A container body is provided inside the backfill concrete, an electromagnet is provided in the container body, and when the electromagnet operates, the electromagnet and the anchor are adsorbed,
When the container is fixed to the backfill concrete and the electromagnet is not operated, the container is not fixed to the backfill concrete.

According to a fifteenth invention, there is provided a storage facility in a rock mass provided in a cavity formed in the rock mass, wherein backfill concrete is provided in the hollow space, and an anchor and the first concrete are placed in the backfill concrete. An electromagnet is provided, a container body is provided inside the backfill concrete, a second electromagnet is provided in the container body, and when the first electromagnet and the second electromagnet operate, the first electromagnet and the second electromagnet are provided. Electromagnets are attracted,
When the container is fixed to the backfill concrete, and the first electromagnet and the second electromagnet are not operated, the container is not fixed to the backfill concrete. is there.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a storage facility 1 in a rock mass and surrounding facilities according to the present embodiment. FIG. 2 is a sectional perspective view showing a schematic configuration of the storage facility 1 in the rock. The in-bed storage facility 1 is a facility for storing a gas such as natural gas at high pressure in a bed.

As shown in FIGS. 1 and 3, the in-bed storage facility 1 excavates and forms an in-bed cavity 2 in a bed 9 and places a thin steel container (airtight material) 3 in the in-bed cavity 2. The insulating material 5 is provided around the container body 3, and the backfill concrete 7 is further provided between the container body 3 and the bedrock 9.

An access tunnel 13 is provided between the ground facility 11 and the storage facility 1 in the rock to supply and discharge stored gas such as natural gas. A plug 12 is provided between them. The ground facility 11 is provided with a compressor 15 for compressing a stored gas such as natural gas. The compressor 15 is connected to the in-rock storage facility 1 via a pipe 14. Also, the compressor 1
5 is a city gas conduit 17 through which a stored gas such as natural gas flows.
Is provided.

As shown in FIG. 2, the storage facility 1 in the bedrock is of a so-called silo type having a cylindrical lower part and a hemispherical upper part. In the storage facility 1 in rock, natural gas 1
Store high pressure gas such as 0. The maximum working pressure of the natural gas 10 stored in the rock storage facility 1 is, for example, 70
Atmospheric pressure to about 250 atm. In addition, storage facility 1 in bedrock
May have another shape such as a tunnel type.

Next, the structure and construction method of the in-bed storage facility 1 will be described in detail. Fig. 3 shows the storage facility 1
FIG. The inside of the bedrock 9 is excavated to construct the cavity 2 in the bedrock. Then, sprayed concrete 8 is provided as a support on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 is provided inside the sprayed concrete 8. At this time, a mold or the like is provided at the position of the insulating material 5. The backfill concrete 7 is a reinforcing steel or a plain concrete.

Inside the backfill concrete 7, an insulating material 5
Is provided. The insulating material 5 is a deformable flexible material that prevents propagation of a shear force that may cause distortion in the container body 3. As the insulating material 5, a material such as polyethylene or Teflon having high rigidity, and asphalt, rubber or the like having low rigidity are used. An anchor 6 is provided on the backfill concrete 7.

The container 3 is provided inside the insulating material 5. The material of the container body 3 is a steel plate that maintains airtightness. This container body 3 is made of thin steel, and is supported on backfill concrete 7 by a plurality of anchors 6. In addition, after the spraying concrete 8 is constructed, the container 3, the insulating material 5, and the anchor 6 may be constructed, and the backfill concrete 7 may be provided by using the container 3 as a formwork.

FIG. 4 is an enlarged view of the anchor 6.

In the present embodiment, the thin steel container 3 is fixed to the backfill concrete 7 with the slide-type anchor 6. The sliding anchor 6 is slidable in the container body surface direction with respect to the container body 3 and the backfill concrete 7 surface.

As shown in FIG. 4, the anchor 6 includes a support portion 28, a slide portion 29, and a slide receiver 30. A disc-shaped slide portion 29 is provided at the tip of the rod-shaped support portion 28. The container body 3 is provided with a slide receiver 30 in which a disk-shaped space is formed. A slide portion 29 is provided on the slide receiver 30 so as to be slidable in the container body surface direction. Although the support portion 28 is fixed to the backfill concrete 7, the slide portion 29 and the slide receiver 30 can relatively move in the container body surface direction, so that the container body 3 itself can move in the direction A in FIG. In order to facilitate sliding, a polyethylene sheet, a Teflon sheet or the like having a friction reducing effect may be attached to the contact surface between the slide portion 29 and the slide receiver 30.

Since the container body 3 can be displaced without being restrained by the forced displacement due to the cracks entering the backfill concrete 7, local distortion hardly occurs. Since the local displacement of the container body 3 due to the cracks in the backfill concrete 7 is a maximum of several mm, this distortion amount can be absorbed.

As described above, according to the present embodiment, the thin steel container 3 constituting the storage facility 1 in the bedrock can be freely moved in the direction of the container body surface with respect to the backfill concrete 7. By fixing at 6, the container body 3 can be displaced without being restrained against forced displacement due to a crack entering the backfill concrete 7. For this reason, the number of times of internal pressure fluctuation which affects the allowable number of repetitive fatigue of the container body 3 can be increased in design, the life can be prolonged, and economical design becomes possible. The durability of the container body 3 is improved, and low-cost construction can be performed. In addition, compared to a free-standing container, it is not necessary to have a thick-walled, self-supporting structure, and it is possible to construct the container 3 at low cost.

Next, a second embodiment will be described. The storage facility 31 in the rock according to the present embodiment
Between the container body 3 and the first backfill concrete 7, the first
, An insulating material 33, a second backfill concrete 35, and a second insulating material 37 are provided.

Next, the structure and construction method of the in-bed storage facility 31 will be described in detail. FIG. 5 is a partial sectional view of the in-bed storage facility 31. As shown in FIG. 5, the inside of the bedrock 9 is excavated to construct the cavity 2 in the bedrock. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 (first backfill concrete) is provided inside the sprayed concrete 8. At this time, a mold or the like is provided at the position of the insulating material 33. The backfill concrete 7 is reinforced concrete on which reinforcing steel is arranged.

The insulating material 3 is placed inside the backfill concrete 7.
3 is provided. The insulating material 33 is a deformable and flexible material that prevents propagation of a shear force that may cause distortion in the container body 3. As the insulating material 33, a material such as polyethylene or Teflon having high rigidity and a material such as asphalt or rubber having low rigidity are used.

A backfill concrete 35 (second backfill concrete) is provided inside the insulating material 33. The backfill concrete 35 may be plain concrete. At this time,
A mold or the like is provided at the position of the insulating material 37. An insulating material 37 is provided inside the backfill concrete 35. The same material as the above-described insulating material 33 is used for the insulating material 37.

Inside the insulating material 37, the thin steel container 3
Is provided. The material of the container body 3 is a steel plate that maintains airtightness. After the spraying concrete 8 is applied, the container body 3 and the insulating material 37 may be applied, the backfill concrete 35 may be provided, and after the insulating material 33 is applied, the backfill concrete 7 may be provided.

The shearing force 23 caused by the crack 21 generated on the side of the bedrock 9 is caused by the backfill concrete 7 and the insulating material 33, the insulating material 33 and the backfill concrete 35, and the backfill concrete 3.
The slip is generated between the insulating material 5 and the insulating material 37 and between the insulating material 37 and the container body 3, and is successively reduced.

As described above, according to the present embodiment, the rock 9
Between the container 3 and the spray concrete 8, the backfill concrete 7, the insulating material 33, the backfill concrete 35,
By providing the insulating material 37, even if the crack 21 occurs on the rock 9 side, propagation of strain to the container body 3 can be prevented, and strain concentration can be more reliably alleviated.

When the conventional insulating material has one layer, once,
In the container body and the backfill concrete in contact with the broken insulating material, a local displacement of the backfill concrete may be transmitted to the container body due to frictional force when the internal pressure is again applied. In this embodiment, since the insulating material 33 and the insulating material 37 are arranged in a plurality of layers, such danger can be prevented. Furthermore, the amount of reinforced concrete used can be reduced, and low-cost construction is possible.

In the present embodiment, the backfill concrete 7 is arranged as reinforced concrete and the backfill concrete 35 is arranged as unreinforced concrete. Both can be plain concrete. Note that an anchor may be provided in the container body 3 and supported by the backfill concrete 7 or 35.

Next, a third embodiment will be described. The in-bed storage facility 41 according to the present embodiment is provided with two layers of insulating material 43 and insulating material 45, uses the insulating material 43 having relatively low rigidity on the rock 9 side, and has relatively high rigidity on the container body 3 side. An insulating material 45 having a high surface and a small frictional resistance is used.

Next, the structure and construction method of the in-bed storage facility 41 will be described in detail. FIG. 6 is a partial sectional view of the storage facility 41 in the bedrock. As shown in FIG. 6, the inside of the bedrock 9 is excavated to construct the cavity 2 in the bedrock. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 is provided inside the sprayed concrete 8. At this time, a mold or the like is provided at the position of the insulating material 43. The backfill concrete 7 is a reinforcing steel or a plain concrete.

Inside the backfill concrete 7, insulating material 4
3 is provided. As the insulating material 43, a material such as asphalt and rubber having relatively low rigidity is used.

An insulating material 45 is provided inside the insulating material 43. For the insulating material 45, a material such as a polyethylene sheet, Teflon, etc., having relatively high rigidity and low frictional resistance on the surface is used.

Inside the insulating material 45, the thin steel container 3
Is provided. The material of the container body 3 is a steel plate that maintains airtightness. After the spraying concrete 8 is applied, the container 3, the insulating material 45, and the insulating material 43 may be applied, and the backfill concrete 7 may be provided by using the container 3 as a mold.

As described above, according to the present embodiment, the rock 9
A spray concrete 8, a backfill concrete 7, an insulating material 43, and an insulating material 45 are provided between the container body 3 and the container body 3. The insulating material 43 is made of a material having relatively low rigidity such as asphalt or rubber. By using a material such as a polyethylene sheet, Teflon, etc., having a relatively high rigidity and a low frictional resistance on the surface, even if the crack 21 is formed on the rock 9 side,
Generally, the insulating material 43 having relatively low rigidity can reduce local strain propagation to the container body 3 by breaking the insulating material 43 itself by the shearing force 23 from the rock 9 side. Insulation material 4
Even if 3 breaks at the interface with backfill concrete 7, backfill concrete 7 comes into contact with another rigid insulating material 45 and slips with container body 3, so that strain propagation occurs. Can be blocked.

When the conventional insulating material has one layer,
In the container body and the backfill concrete in contact with the broken insulating material, a local displacement of the backfill concrete may be transmitted to the container body due to frictional force when the internal pressure is again applied. In this embodiment, since the insulating material 43 and the insulating material 45 are arranged in a plurality of layers, such danger can be prevented.

In this embodiment, two insulating materials are provided. However, the number of insulating materials is not limited to two, and two or more insulating materials may be provided. Further, an anchor may be provided in the container body 3 and supported by the backfill concrete 7.

Next, a fourth embodiment will be described. The in-bed storage facility 51 of the present embodiment includes two layers of insulating material 53 and insulating material 55 having high rigidity and low surface frictional resistance.
Is provided.

Next, the structure and construction method of the in-bed storage facility 51 will be described in detail. FIG. 7 is a partial sectional view of the storage facility 51 in the rock. As shown in FIG. 7, the inside of the bedrock 9 is excavated to construct the cavity 2 in the bedrock. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 is provided inside the sprayed concrete 8. At this time, a mold or the like is provided at the position of the insulating material 53. The backfill concrete 7 is a reinforcing steel or a plain concrete.

Inside the backfill concrete 7, there is an insulating material 5.
3. The insulating material 55 is provided. For the insulating material 53 and the insulating material 55, a material such as a polyethylene sheet or Teflon having relatively high rigidity and a small surface frictional resistance is used.

The container 3 is provided inside the insulating material 55.
The material of the container body 3 is a steel plate that maintains airtightness. This container 3 is made of thin steel. After the spraying concrete 8 is applied, the container 3, the insulating material 55, and the insulating material 53 are applied, and the backfill concrete 7 is used instead of the container 3 as a mold.
May be provided.

As described above, according to the present embodiment, the rock 9
By providing sprayed concrete 8, backfill concrete 7, two layers of insulating material 53 and insulating material 55 having high rigidity and low surface frictional resistance between the
The shearing force 23 due to the crack 21 on the side is mainly caused by slip between the insulating material 53 and the insulating material 55, and secondarily between the backfill concrete 7 and the insulating material 53 and between the insulating material 55 and the container body 3. It is gradually reduced, and finally the propagation of strain to the container body 3 can be prevented.

When the conventional insulating material has one layer,
In the container body and the backfill concrete in contact with the broken insulating material, a local displacement of the backfill concrete may be transmitted to the container body due to frictional force when the internal pressure is again applied. In this embodiment, since the insulating material 53 and the insulating material 55 are arranged in a plurality of layers, such danger can be prevented.

In this embodiment, two insulating materials are provided. However, the number of insulating materials is not limited to two, and two or more insulating materials may be provided. Further, an anchor may be provided on the container body 3 and supported by backfill concrete.

Next, a fifth embodiment will be described. The in-bed storage facility 61 according to the present embodiment is provided with a liquid insulating material 67 in which a liquid having a lubricating action (water, oil, or the like) is sealed instead of the insulating material.

Next, the structure and construction method of the in-bed storage facility 61 will be described in detail. FIG. 8 is a partial cross-sectional view of the in-bed storage facility 61. As shown in FIG. 8, the inside of the bedrock 9 is excavated to construct the cavity 2 in the bedrock. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 is provided inside the sprayed concrete 8. The backfill concrete 7 is a reinforcing steel or a plain concrete.

Next, a waterproof material 63 is provided on the inner surface of the backfill concrete 7. The material of the water stopping material 63 is a plastic material, a rubber sheet, a thin steel plate, or the like that can maintain the liquid tightness of the liquid insulating material 67. A liquid 65 is provided inside the waterproof material 63.
Is provided, and the container body 3 made of thin steel is provided. The material of the container body 3 is a steel plate that maintains airtightness.

A liquid 65 such as water or oil is sealed in the gap between the water-stopping material 63 and the container 3 to form a liquid insulating material 67. The amount of the liquid 65 is controlled according to the internal storage pressure.

As described above, according to the present embodiment, the rock 9
A spraying concrete 8, a backfilling concrete 7, and a water-stopping material 63 are provided between the water-stopping material 63 and the container body 3, and a liquid 65 (water, oil, etc.) is sealed between the water-stopping material 63 and the container body 3 for lubrication. By providing a certain liquid insulating material 67, even if the crack 21 of the rock 9 occurs due to the internal pressure load, the shear force 23 cannot be propagated due to the presence of the liquid insulating material 67.
Has no local distortion. Therefore, in the design of the container 3,
There is no need to consider local strain caused by the cracks 21 in the rock 9, which is extremely advantageous in terms of fatigue design as compared with a conventional container design using an insulating material.

Next, a sixth embodiment will be described. The in-bed storage facility 71 according to the present embodiment has a double structure of backfill concrete, insulating material, and a container body, and has an air leakage collecting pipe 75 in the backfill concrete on the container body side.

Next, the structure and construction method of the in-bed storage facility 71 will be described in detail. FIG. 9 is a partial sectional view of the storage facility 71 in the rock. FIG. 10 shows the storage facility 7 in the bedrock.
1 shows the state of installation of the air leak collection pipe 75.

As shown in FIG. 9, the inside of the bedrock 9 is excavated to construct the cavity 2 in the bedrock. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. Inside the sprayed concrete 8,
Backfill concrete 7 is provided. At this time, a mold or the like is provided at the position of the insulating material 72. The backfill concrete 7 is a reinforcing steel or a plain concrete.

Inside the backfill concrete 7, an insulating material 7
2 is provided. As the insulating material 72, a deformable flexible material is used. A container 73 made of thin steel is provided inside the insulating material 72. The container body 73 is a steel plate, plastic, or the like that maintains airtightness.

An insulating member 74 is provided inside the container 73,
The air leak collecting pipe 75 is installed, and the backfill concrete 76 is poured. Backfill concrete 76 may be plain concrete.

As shown in FIG. 10, one leak collecting pipe 7
5 is in contact with the rock-side wall surface of the backfilling concrete 76, and from the top 78 to the bottom 79 of the storage facility 71 in the bedrock.
It is installed spirally toward. A large number of holes 70 for taking in the leaked gas are provided on the pipe wall of the leak collecting pipe 75, and the leaked gas is collected in the leak collecting pipe 75 through the holes 70. The leaked gas collected by the air leak collecting pipe 75 is discharged to the outside from the crown 78.

Next, the insulating material 77 and the container 3 are provided inside the backfill concrete 76 having the air leak collecting pipe 75. The material of the container body 3 is a steel plate that maintains airtightness.

As described above, according to the present embodiment, the rock 9
Inside, a sprayed concrete 8, a backfill concrete 7, an insulating material 72, a container body 73, an insulating material 74, a backfill concrete 76, an insulating material 77, and a container body 3 are provided from the outside, and the container body is a container body 73, a container body. In the case where a penetration defect occurs in the container body 3 by providing a leak collecting pipe 75 for collecting gas leaked into the backfill concrete 76, the gas leaking from the container body 3 , Air leak collection tube 75
The safety is further improved.

Further, compared with the case where an air leakage collecting pipe 75 is provided in the backfill concrete 76 and the air leakage collecting pipe 75 is arranged in the backfill concrete 7, the leaked gas can be reduced.
3. The trapping efficiency is improved because it is contained in the closed space of the container body 3.

In the present embodiment, a single air leakage collecting pipe 75 is placed in the backfill concrete 76 from the bottom 79 of the storage facility 71 in the rock to the top 78 in the backfill concrete 76. Although it is provided in a spiral shape, a plurality of air leakage collecting tubes 75a extending radially from the bottom 79 of the storage facility 71 in the rock to the top 78 may be provided in the backfill concrete 76. FIG. 11 shows the storage facility 7 in the bedrock.
1 shows an installation state of a radially extending air leakage collecting tube 75a. A number of holes 70a are provided in the air leak collecting tube 75a.

Next, a seventh embodiment will be described. In the present embodiment, in the storage facility 81 in the bedrock,
The electromagnet 4 is provided on the backfill concrete 7, and the electromagnet 4 is used to fix and control the container body 3 according to the internal pressure load state.

Next, the structure of the storage facility 81 in the bedrock of this embodiment and the method of fixing the container 3 by the operation of the electromagnet 4 will be described in detail. FIG. 12 is a partial cross-sectional view of the in-bed storage facility 81 in a state where no internal pressure is applied. FIG.
FIG. 3 is a partial cross-sectional view of a storage facility 81 in a rock under an internal pressure load.

The in-bedrock storage facility 81 excavates the inside of the bedrock 9 to construct the in-bedrock cavity 2. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 is provided inside the sprayed concrete 8. The backfill concrete 7 is a reinforcing steel or a plain concrete. A plurality of anchors 6 are provided for backfill concrete 7.
The container 3 is provided inside the backfill concrete 7, and the insulating material 5 is further provided on the container 3.

The electromagnet 4 is provided on the anchor 6 of the backfill concrete 7, and a member 86 is provided on the surface of the container 3 at a position corresponding to the electromagnet 4. The material of the member 86 is iron or the like that receives a magnetic force. The insulating material 5 is provided on the surface of the container body 3 where the member 86 is not arranged. The material of the insulating material 5 is a highly rigid polyethylene sheet, Teflon, or the like. The container body 3
It is a steel plate that maintains airtightness.

As shown in FIG. 12, during construction or in a state where no internal pressure is applied (83), the power of the electromagnet 4 is turned on (operating state of the electromagnet 4), the electromagnet 4 and the member 86 are attracted, and the container body 3 is closed. It is fixed to the concrete 7 (82).

Next, as shown in FIG. 13, in an internal pressure load state (85) as in a normal operation, the power of the electromagnet 4 is turned off (the electromagnet 4 is not operated), and the container body 3 is filled with the backfill concrete 7. (84).

As described above, according to the present embodiment, the in-bed storage facility 81 provides the electromagnets 4 in the backfill concrete 7 and operates the electromagnets 4 in a state where no internal pressure is applied.
When the container 3 is fixed to the backfill concrete 7 and the internal pressure is applied, the power of the electromagnet 4 is turned off, and the container 3 is not fixed to the backfill concrete 7. Thereby, even if the crack 21 of the rock 9 is generated due to the internal pressure load, the shear force 23 cannot be propagated, so that no local distortion occurs in the container 3. Therefore, it is not necessary to consider the local distortion caused by the crack 21 of the rock 9 in the design of the container 3, which is extremely advantageous in fatigue design as compared with the conventional container using an insulating material.

Next, an eighth embodiment will be described with reference to FIGS. The rock storage facility 91 according to the present embodiment is provided with a piezoelectric element 96 on the surface of the container 3,
The electromagnet 4 is provided on the backfill concrete 7, and the container 3 is fixedly controlled with respect to the backfill concrete 7 according to the internal pressure load state in combination with the electromagnet 4 and the piezoelectric element 96.

Next, the structure of the in-bed storage facility 91 and the method of fixing the container 3 by the combined operation of the electromagnet 4 and the piezoelectric element 96 according to the present embodiment will be described in detail. FIG.
It is a fragmentary sectional view of the storage facility 91 in the rock which is not loaded with internal pressure. FIG. 15 shows a storage facility 9 in a rock mass under an internal pressure load state.
1 is a partial sectional view of FIG.

As shown in FIG. 14, the storage facility 91 in the bedrock excavates the inside of the bedrock 9 to construct a cavity in the bedrock. Then, sprayed concrete 8 is provided on the wall surface of the excavated rock mass 9. The sprayed concrete 8 forms a smooth wall surface of the bedrock 9. The backfill concrete 7 is provided inside the sprayed concrete 8. The backfill concrete 7 is a reinforcing steel or a plain concrete. A plurality of anchors 6 are provided for backfill concrete 7. A piezoelectric element 96 is provided in the container 3.

The electromagnet 4 is provided on the anchor 6 of the backfill concrete 7, and the member 86 is provided on the piezoelectric element 96 of the container 3 at a position corresponding to the electromagnet 4. The material of the member 86 is iron or the like that receives a magnetic force. The insulating material 5 is provided on the container body 3 where the member 86 is not disposed. The material of the insulating material 5 is a highly rigid polyethylene sheet or the like. The container 3 is an iron plate that maintains airtightness.

As shown in FIG. 14, no compression stress is generated in the piezoelectric element 96 and no voltage is generated in the compression element 96 during construction or in a state in which no internal pressure is applied (93). At this time,
The electromagnet 4 is in the operating state, and fixes the container body 3 to the backfill concrete (92).

Next, as shown in FIG. 15, when the container body 3 is pressed against the backfill concrete 7 by the internal pressure load 95 in an internal pressure load state (95) as in a normal operation, the piezoelectric element 96 is compressed. Stress is applied and a voltage is generated by the piezo effect. That is, in a state where the internal pressure is applied, when the compressive stress is applied to the piezoelectric element 96 and the voltage of the piezoelectric element 96 exceeds a certain level, the power supply of the electromagnet 4 is turned off and the container 3 does not operate. Not fixed (94).

FIG. 16 to FIG. 18 show a storage facility 91 in rock mass.
FIG. 17 is a diagram showing a control system of the first embodiment. As shown in FIG. As shown in FIG. 17, when the relay 101 is open (operating),
The power is not supplied from the control power supply 103 to the electromagnetic contactor 105, the electromagnetic contactor 105 is de-energized, and the power is supplied from the control power supply 103 to the electromagnetic contactor 105 when the relay 101 is closed (inactive). The electromagnetic contactor 105 is excited. As shown in FIG. 18, when the electromagnetic contactor 105 is not excited (non-operating), power is not supplied to the electromagnet excitation coil 109 from the power supply 107, and when the electromagnetic contactor 105 is excited (operating), Power is supplied from the power supply 107 to the electromagnet excitation coil 109.

In the state where the internal pressure is not applied (93), as shown in FIG. 16, no compressive stress is generated in the piezoelectric element 96 and no voltage is generated in the piezoelectric element 96. In this case, the relay 101 is not energized, the contact of the relay 101 in FIG. 17 is closed and becomes conductive, and the electromagnetic contactor 105 is excited. Then, the electromagnetic contactor 105 in FIG. 18 becomes conductive, and the electromagnet excitation coil 109 is excited. Therefore,
As shown in FIG. 14, the electromagnet 4 is in an operating state,
The container body 3 is fixed to the backfill concrete 7.

On the other hand, in the internal pressure load state (95), FIG.
As shown in the figure, a voltage is generated in the piezoelectric element 96 and the relay 1
01 is excited. Then, the contact of the relay 101 in FIG. 17 is opened, and the electromagnetic contactor 105 is not excited. In this case, the electromagnetic contactor 105 in FIG. 18 is opened, and the electromagnet excitation coil 109 is not excited (non-operating). Therefore, as shown in FIG. 15, the electromagnet 4 does not operate, and the container 3 is not fixed to the backfill concrete 7.

As described above, according to the present embodiment, in the storage facility 91 in the bedrock, the piezoelectric element 96 is provided in the container body 3, the electromagnet 4 is provided in the backfill concrete 7, and when no internal pressure is applied, the electromagnet 4 In an operating state, the container 3 is fixed to the backfill concrete 7, and in an internal pressure load state, when a compressive stress is applied to the piezoelectric element 96 and the voltage of the piezoelectric element 96 exceeds a specified value, the electromagnet 4 becomes inoperable and the container 3 is not fixed to the backfill concrete 7.

Thus, even if the crack 21 of the rock 9 is generated by the internal pressure load, the shear force 23 cannot be propagated, so that no local distortion occurs in the container 3. Therefore, it is not necessary to consider the local distortion caused by the crack 21 of the rock 9 in the design of the container 3, which is extremely advantageous in fatigue design as compared with the conventional container using an insulating material.

In the present embodiment, the electromagnet 4 is provided on the anchor 6, but the member 86 may be an electromagnet and the electromagnet 4 of FIG. In FIG. 12, the member 86 may be an electromagnet while the electromagnet 4 is left as it is.

[0093]

As described above in detail, according to the present invention, a rock mass which is low in cost and prevents local distortion to a container body even when a local crack occurs in the surrounding rock mass. An internal storage facility and a construction method thereof can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a rock storage facility 1 and surrounding facilities according to the present embodiment.

FIG. 2 is a cross-sectional perspective view showing a schematic configuration of a storage facility 1 in bedrock.

FIG. 3 is a cross-sectional view of the storage facility 1 in bedrock.

FIG. 4 is an enlarged view of the anchor 6;

FIG. 5 is a partial cross-sectional view of the storage facility 31 in the bedrock.

FIG. 6 is a partial cross-sectional view of the storage facility 41 in the bedrock.

FIG. 7 is a partial cross-sectional view of the storage facility 51 in the bedrock.

FIG. 8 is a partial cross-sectional view of the storage facility 61 in the bedrock.

FIG. 9 is a partial cross-sectional view of the storage facility 71 in the bedrock.

FIG. 10 is a view showing an installation state of an air leakage collecting pipe 75 of a storage facility 71 in a bedrock.

FIG. 11 shows a state of installation of a radially extending air leakage collecting pipe 75 of the storage facility 71 in the bedrock.

FIG. 12: Storage facility 8 in rock mass under no internal pressure load
Partial sectional view of 1

FIG. 13 is a partial cross-sectional view of a rock storage facility 81 under an internal pressure load.

FIG. 14: In-rock storage facility 9 in a state where internal pressure is not applied
Partial sectional view of 1

FIG. 15 is a partial cross-sectional view of a storage facility 91 in a rock under an internal pressure load.

FIG. 16 is a diagram showing a control system of the storage facility 91 in the bedrock.

FIG. 17 is a diagram showing a control system of the storage facility 91 in the bedrock.

FIG. 18 is a diagram showing a control system of the storage facility 91 in the bedrock.

[Explanation of symbols]

1, 31, 41, 51, 61, 71, 81, 91 ...
Storage facility in bedrock 2 ... Cavity in bedrock 3, 73 ... Container (airtight material) 4 ... Electromagnet 5, 33, 37, 43, 45, 53, 55, 72, 7
4, 77 ... Insulation material 6 ... Anchor 7, 35, 76 ... Backfill concrete 8 ... Shotcrete 9 ... Rock bed 10 ... Natural gas (high pressure gas) 11 ... Ground Facility 13 Access tunnel 14 Pipe 15 Compressor 17 City gas conduit 28 Support 29 Slide 30 Slide receiver 63 Water-stopping material 65: Liquid 75: Leakage collecting tube 96: Piezoelectric element

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Usui Tokyo Gas Co., Ltd. 1-5-20 Kaigan, Minato-ku, Tokyo (72) Inventor Naohiro Sakami 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Inside the corporation

Claims (38)

[Claims] 1. A storage facility in a rock mass provided in a cavity formed in a rock mass, wherein an insulating material is provided around a container body, and backfill concrete is provided between the insulating material and the rock mass. A storage facility in a rock mass, wherein a slidable anchor is provided between the backfill concrete and the container body. 2. The storage facility in rocks according to claim 1, wherein the anchor is slidable in the direction of the container body surface. 3. The anchor includes a slide receiver provided on a container body, a support part fixed to backfill concrete, and a slide part fixed to the support part and sliding in the slide receiver. The storage facility in bedrock according to claim 1, characterized in that: 4. The storage facility in a bedrock according to claim 1, wherein said container body is made of thin steel. 5. A hollow is formed in a bedrock, backfill concrete is poured into the hollow, an insulating material and a container are provided, and a slidable anchor is provided between the backfill concrete and the container. A method for constructing a storage facility in a rock mass, which is provided. 6. The method according to claim 5, wherein the anchor is slidable in the direction of the container body surface. 7. A storage facility in a rock mass provided in a cavity formed in a rock mass, wherein a first backfill concrete, a first insulating material, a second backfill concrete, A storage facility in bedrock, comprising a second insulating material and a container. 8. The storage facility in a rock mass according to claim 7, wherein the first backfill concrete is reinforced concrete or unreinforced concrete. 9. The storage facility in bedrock according to claim 7, wherein the second backfill concrete is unreinforced concrete. 10. The structure according to claim 7, wherein the first insulating material and the second insulating material are deformable flexible materials.
The rock storage facility described. 11. A method for constructing a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein the first backfill concrete, the first insulating material, and the second
A method for constructing a storage facility in a rock mass, comprising providing backfill concrete, a second insulating material, and a container body. 12. A bedrock storage facility provided in a cavity formed in the bedrock, wherein backfill concrete, a plurality of insulating materials, and a container body are provided in the cavity from the outside. Internal storage facility. 13. The in-rock storage facility according to claim 12, wherein the plurality of insulating materials are provided in two layers, and are a first insulating material and a second insulating material. 14. The storage facility in rock according to claim 13, wherein the first insulating material is an insulating material having low rigidity. 15. The storage facility according to claim 14, wherein the low-rigidity insulating material is asphalt, rubber, or the like. 16. The storage facility according to claim 13, wherein the second insulating material is an insulating material having high rigidity and low surface frictional resistance. 17. The storage facility according to claim 16, wherein the insulating material having high rigidity and low surface frictional resistance is a polyethylene sheet, Teflon or the like. 18. A method for constructing a storage facility in a bedrock provided in a cavity formed in a bedrock, the method comprising:
A method for constructing a storage facility in rock mass, comprising providing backfill concrete, a plurality of insulating materials, and a container body from the outside. 19. A storage facility in a rock mass provided in a cavity formed in a rock mass, comprising a backfill concrete from outside, an insulating material having a plurality of layers of high rigidity and a low frictional resistance on a surface, provided in the cavity. A rock storage facility characterized by providing a container body. 20. The storage facility in rocks according to claim 19, wherein said insulating material having high rigidity and low surface frictional resistance is a polyethylene sheet, Teflon or the like. 21. A method for constructing a storage facility in a bedrock provided in a cavity formed in a bedrock, the method comprising:
A method for constructing a storage facility in a rock mass, comprising providing backfill concrete, a plurality of layers of insulating material having high rigidity and low frictional resistance on the surface, and a container body from the outside. 22. A storage facility in a rock mass provided in a cavity formed in a rock mass, wherein a backfill concrete, a waterproof material, and a container are provided from the outside in the cavity, and the waterproof material and the container are provided. A storage facility in bedrock, characterized by filling a liquid between the bodies. 23. The storage facility in a rock mass according to claim 22, wherein the liquid is water, oil, or the like. 24. The storage facility in a rock according to claim 22, wherein the water-stopping material is a plastic material, a rubber sheet, a thin steel plate, or the like that can maintain the liquid tightness of the liquid. 25. A method for constructing a storage facility in a rock mass provided in a cavity formed in a rock mass, wherein a backfill concrete, a waterproof material, and a container are provided in the cavity from the outside, and the waterproof material is provided. A method for constructing a storage facility in a rock mass, wherein a liquid is sealed between the container and the container. 26. A storage facility in a bedrock provided in a cavity formed in the bedrock, wherein the first backfill concrete, the first insulating material, the first container body, Providing a second insulating material, a second backfill concrete, a third insulating material, and a second container body, and providing a leak collecting pipe for collecting gas leaking into the second backfill concrete. Storage facility in rock. 27. The leak trap tube is spirally provided in the second backfill concrete from the bottom to the top of the storage facility in rock.
6. The storage facility in bedrock according to 6. 28. The leak trap tube is provided radially in the second backfill concrete from the bottom to the top of the storage facility in rock.
The rock storage facility described. 29. The storage facility according to claim 26, wherein the leak collecting pipe has a large number of holes in the pipe wall for taking in leaked gas. 30. A method for constructing a storage facility in a bedrock provided in a cavity formed in a bedrock, the method comprising:
A first backfill concrete, a first insulating material, a first container body, a second insulating material, a second backfill concrete, a third insulating material, a second container body are provided from outside. 2. A method for constructing a storage facility in a rock mass, comprising providing a leak collecting pipe for collecting gas leaked into backfill concrete. 31. A storage facility in a rock mass provided in a cavity formed in a rock mass, wherein backfill concrete is provided in the cavity, an anchor and an electromagnet are provided in the backfill concrete, and the inside of the backfill concrete is provided. The container body is provided, a member receiving a magnetic force is provided on the container body, and when the electromagnet operates, the electromagnet and the member are attracted, the container body is fixed to the backfill concrete, and the electromagnet operates. Characterized in that the container body is not fixed to the backfill concrete if not. 32. The storage facility in a rock mass according to claim 31, wherein a piezoelectric element is provided between the container and the member. 33. In a state where no internal pressure is applied to the container, the potential of the piezoelectric element is not generated, the electromagnet operates, and the container is attracted to the backfill concrete by the electromagnet, 33. The container according to claim 32, wherein when the internal pressure is applied to the container, a potential of the piezoelectric element is generated, the electromagnet does not operate, and the container is not fixed to the backfill concrete. Storage facility in bedrock. 34. The storage facility in rocks according to claim 31, wherein the container is made of thin steel. 35. A storage facility in a rock mass provided in a cavity formed in a rock mass, comprising a backfill concrete in the cavity, an anchor provided in the backfill concrete, and a container inside the backfill concrete. Providing a body, providing an electromagnet in the container body, when the electromagnet operates, the electromagnet and the anchor are adsorbed, the container body is fixed to the backfill concrete, and when the electromagnet is not operating, A storage facility in bedrock, wherein a container body is not fixed to the backfill concrete. 36. The storage facility in a rock according to claim 35, wherein a piezoelectric element is provided between the container and the electromagnet. 37. A storage facility in a rock mass provided in a cavity formed in a rock mass, wherein backfill concrete is provided in the cavity, and an anchor and a first electromagnet are provided in the backfill concrete, wherein the backfill concrete is provided. A container body is provided inside the confined concrete, and a second electromagnet is provided in the container body.
When the first electromagnet and the second electromagnet operate, the first electromagnet and the second electromagnet are attracted, the container is fixed to the backfill concrete, and the first electromagnet and the second electromagnet are moved.
Wherein the container is not fixed to the backfill concrete when the electromagnet is not operated. 38. The storage facility in a rock according to claim 37, wherein a piezoelectric element is provided between the container and the second electromagnet.