GB2296557A - Stabilisation of an underground construction for storing pressurized fluid - Google Patents

Stabilisation of an underground construction for storing pressurized fluid Download PDF

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Publication number
GB2296557A
GB2296557A GB9426365A GB9426365A GB2296557A GB 2296557 A GB2296557 A GB 2296557A GB 9426365 A GB9426365 A GB 9426365A GB 9426365 A GB9426365 A GB 9426365A GB 2296557 A GB2296557 A GB 2296557A
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GB
United Kingdom
Prior art keywords
pressure
underground construction
proof underground
proof
heavy mud
Prior art date
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Granted
Application number
GB9426365A
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GB2296557B (en
GB9426365D0 (en
Inventor
Masao Hayashi
Toshio Fujiwara
Yukio Yamashita
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Tokai University
Obayashi Corp
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Tokai University
Obayashi Corp
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Priority to GB9426365A priority Critical patent/GB2296557B/en
Publication of GB9426365D0 publication Critical patent/GB9426365D0/en
Publication of GB2296557A publication Critical patent/GB2296557A/en
Application granted granted Critical
Publication of GB2296557B publication Critical patent/GB2296557B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/007—Underground or underwater storage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0114—Shape cylindrical with interiorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0345—Fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0362—Thermal insulations by liquid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0617—Single wall with one layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0103—Exterior arrangements
    • F17C2205/0111—Boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/0126—One vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F17C2205/0355—Insulation thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/238—Filling of insulants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/031—Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/011—Improving strength
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/046—Enhancing energy recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/07—Generating electrical power as side effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0142—Applications for fluid transport or storage placed underground
    • F17C2270/0144—Type of cavity
    • F17C2270/0147—Type of cavity by burying vessels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

A pressure-proof underground construction 17 is stabilised by the pressure applied by surrounding layer 20 of heavy mud or another fluid of high specific gravity. This fluid distributes pressure more evenly reducing local stress which may cause cracks. An isolating screen 18 or reinforcement fibre such as carbon fibre or glass fibre may be provided around the layer of heavy mud separating it from the surrounding soil. The construction may be a compressed air storage system for storing excess power from a power station to be used when more power is demanded. <IMAGE>

Description

STABILIZING STRUCTURE OF PRESSURE-PROOF UNDERGROUND CONSTRUCTION The present invention relates to a stabilizing structure for a pressure-proof underground construction for storing pressurized fluid, such as high pressure liquid and so forth.
As a pressure-proof construction for storing pressurized fluid such as high pressure gas, high pressure liquid and so forth, pressure containers such as pressure tanks and so forth have been used. Also, in urban areas and so forth, in order to accomplish effective use of the ground surface in the regions where the pressure-proof underground construction is placed, and to preserve the sights, there has been proposed technology for providing such pressure-proof underground construction in underground.
On the other hand, as the pressure-proof underground construction to be constructed underground, the constructions withstanding higher pressure are desired. For instance, in a Compressed Air Energy Storage system (hereinafter referred to as "CAES system") proposed for utilizing nighttime generated power, it is required to store high pressure air of 20 to 60 atm. in an underground cavity formed as the pressure-proof underground construction.
The CAES system as exemplified is a system for driving compressor by the nighttime generated power to accumulate high pressure gas, i.e., high pressure air, within the underground cavity and to perform power generation by driving a turbine by the accumulated high pressure air during daytime when more power is consumed.
With such system, excessive electric power can be stored in urban areas without returning of the extra power to pumped storage hydroelectric power plants such as a dam and so forth. Thus, more effective use of electric power can be achieved.
However, in the pressure-proof underground construction constructed underground such as the underground cavity for storing high pressure air in the above-mentioned CAES system, outward load is exerted by the internal pressure of the pressurized fluid stored therein. In such case, when the surrounding soil is relatively loose and cannot apply sufficient soil pressure or water pressure to the peripheral wall of the pressure-proof underground construction, substantial tensile stress is created within the pressure-proof underground construction to cause cracks and so forth to make it difficult to stably maintain the function of the pressure-proof underground construction.
Also, it is possible that the pressure-proof underground construction is subject to local concentration of the load depending upon the surrounding soil condition such as non-uniformity, discontinuity, anisotropic deformation, anisotropic soil pressure, long term creep and so forth. Therefore, the pressure-proof underground construction may not be stably supported from the outside by the surrounding soil.
Therefore, it is an object of the present invention to provide a stabilizing structure for a pressure-proof underground construction which can stably support the pressure-proof underground construction constructed underground and whereby maintain the function by preventing occurrence of cracks and so forth, irrespective of the surrounding soil condition.
According to one aspect of the invention, a stabilizing structure for a pressure-proof underground construction for storing pressurized fluid, comprises heavy mud filled around the pressure-proof underground construction.
In such case, it is preferred that a screen member is disposed between the heavy mud filled around the pressure-proof underground construction and the surrounding soil.
In this specification, the heavy mud may be defined as liquid having specific gravity substantially equal to or smaller than unit weight of the circumferential soil. The heavy mud may also be liquid having property subject to Pascal's principle at ordinary temperature or temperature zone in which the stored fluid in the under ground construction would be kept. It is preferable that the heavy mud includes stable compositions which refrain from subsidence and decomposition for a long period, such as water, bentonite, synthesized dispersing agent and fine particles of barite.
The pressure-proof underground construction in this specification may include hume concrete pipes, prestressed concrete pipes, pre-cast concrete pipes, composite pipes consisting of iron tubes and concrete and so forth.
According to another aspect of the invention, a stabilizing structure for a pressure-proof underground construction, comprises supporting medium fluid having high specific gravity filled around the pressure-proof underground construction.
The present invention will be understood more fully from the detailed description given herebelow and from the accompanying drawings of the preferred embodiment of the invention, which, however, should not be taken to be limitative to the present invention, but are for explanation and understanding only.
In the drawings: Fig. 1 is an explanatory illustration showing one embodiment of the stabilizing structure for the pressure-proof underground construction according to the present invention, in which the pressure-proof underground construction is provided in a tunnel; Fig. 2 is a cross section taken along line II II in Fig. 1; Fig. 3 is an explanatory illustration showing another embodiment of a stabilizing structure for a pressure-proof underground construction according to the present invention, in which the pressure-proof underground construction is constructed within a shaft; and Fig. 4 is a cross section taken along line IV IV in Fig. 3.
The present invention will be discussed in detail in terms of the preferred embodiments with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be obvious, however, to those skilled in the art that the present invention may be practiced without these specific details. In other instance, wellknown structures are not shown in detail in order not to unnecessarily obscure the present invention.
Fig. 1 shows one embodiment of a stabilizing structure for a pressure-proof underground construction, which is applied for stabilizing a pressure-proof underground construction for storing high pressure air as pressurized fluid in a CAES system.
Namely, the CAES system is constructed with a cylindrical pressure-proof underground construction 12 constructed with segments or cast-in-place concrete and so forth within a tunnel 11 formed in soil 10 by known tunnel excavating technology, and a power-generating system 13 placed within an underground space 21 in the vicinity of the pressure-proof underground construction 12 and including a compressor and a turbine-driven generator. With such a CAES system, high pressure air generated by the compressor utilizing nighttime generated power is supplied to the pressure-proof underground construction 12 via a communication piping 14 and is stored therein at high pressure condition in the extent of 20 to 60 atm. In daytime, when power consumption becomes larger, the stored high pressure air is discharged for driving the turbine in the power generating system 13 to perform power generation.
Therefore, the excessive power generated during nighttime can be effectively used.
The pressure-proof underground construction 12 storing the high pressure air and forming a part of the above-mentioned CAES system is stabilized by heavy mud 20 filled for surrounding the same. Namely, with the excavated tunnel 11, a tunnel shaft 15 opening to the ground surface is communicated. By charging the heavy mud 20 through the tunnel shaft 15, the clearance between the inner periphery of the tunnel 11 and the outer periphery of the pressure-proof underground construction 12 is filled with the heavy mud 20. By further filling the heavy mud 20 up to the upper portion of the tunnel shaft 15, a pressure head of the heavy mud 20 may be exerted on the external surface of the pressure-proof underground construction 12 to load the heavy mud pressure.
The heavy mud 20 to be used in the shown embodiment is prepared by blending the following components to have specific gravity approximately at 2.00 as shown in TABLE 1. Accordingly, the pressure-proof underground construction 12 filled with the heavy mud 20 therearound receives pre-load on the external surface by large heavy mud pressure. By this, a pre-stress is introduced into the section of the pressure-proof underground construction 12. Therefore, even when high internal pressure is repeatedly exerted on the inner periphery by the high pressure air accumulated in the pressure-proof underground construction 12, the tensile stress to be created by the accumulated high pressure gas, can be reduced.Also, since the heavy mud 20 is present between the inner periphery of the tunnel 11 and the pressure-proof underground construction 12, the corresponding pressure may be exerted as reactive force onto the inner periphery of the tunnel 11 which is loosen during excavation. Thus, by providing supporting force on the inner wall surface of the tunnel 11, the circumferential soil can be constrained to the initial soil pressure. Also, by the flowability of the heavy mud 20, deformation of the soil due to non-uniformity, discontinuity, anisotropic deformation, anisotropic soil pressure, long term creep and so forth can be relieved so that uniform pre-load can be externally applied to the pressure-proof underground construction 12 without being influenced by the circumferential soil condition.
TABLE 1 One example of heavy mud composition of specific gravity of 2.00 for capacity of 218 liter
Material Weight Water 150 kgf Bentonite Knigel V1 12 kgf Telpolymer L 0.45 kgf Telnite B 0.30 kgf Barite 273 kgf On the other hand, Fig. 3 is a longitudinal section showing the second embodiment employing the present invention for stabilizing another type of pressure-proof underground construction to be used in the CAES system.Namely, in this embodiment, in the bottom of a shaft 16 excavated by means of various reverse circulation mud type vertical excavator and so forth, a pressure-proof underground construction 17 is constructed by sequentially sinking concrete rings reinforced by PC strand, for example, and by replacing the mud having normal specific gravity with the heavy mud 20. By this, the pressure-proof underground construction 17 is surrounded by the heavy mud 20. Even in this embodiment, similar to the former embodiment, by the effect of the heavy mud 20, the pressure-proof underground construction 17 can be stabilized. By this, the depth of the pressure-proof underground construction 17 and the excavation depth of the shaft 16 can be reduced to make it possible to construct the pressure-proof underground construction 17 at low cost.Also, in the shown embodiment, after providing an isolating screen 18 of reinforcement fiber such as carbon fiber, glass fiber and so forth, the heavy mud 20 is charged into the space between the isolation screen 18 and the outer periphery of the pressure-proof underground construction 17 to replace the normal mud with the heavy mud 20. Namely, according to such process, at the condition where the shaft 16 is filled with the heavy mud 20 by pushing out the normal mud, the isolation screen 18 is present between the heavy mud 20 and the circumferential soil 10.
By this, the circumferential soil 10 can be maintained in the isolated condition from the heavy mud 20 for a long period. Also, leakage of the underground water can be prevented and, in turn, leakage of the heavy mud 20 to the circumferential soil 10 can be prevented. It should be appreciated that, in the shown embodiment, in order to prevent the floating of the construction 17 due to buoyancy, the pressure-proof underground construction 17 is firmly fixed to the bottom of the shaft 16 by concrete or so forth. Also, the isolation screen 18 may also be applicable for the foregoing first embodiment.
Although the invention has been illustrated and described with respect to exemplary embodiment thereof, it should be understood by those skilled in the art that the foregoing and various other changes, omissions and additions may be made therein and thereto, without departing from the spirit and scope of the present invention. Therefore, the present invention should not be understood as limited to the specific embodiment set out above but to include all possible embodiments which can be embodied within a scope encompassed and equivalents thereof with respect to the feature set out in the appended claims.
For instance, while the present invention is discussed for the case where the pressure-proof underground construction is adapted to store the high pressure air in the CAES system, the stabilizing structure for the pressure-proof underground construction according to the present invention should not be limited but is applicable for any pressure-proof underground construction storing the pressurized fluid, such as L.P.G. and so forth.
As set forth above, with the stabilizing structure for the pressure-proof underground construction according to the present invention, since the heavy mud having high specific gravity is filled, influence of the external soil and by the condition of the circumferential soil can be reduced, and thus the pressure-proof underground construction can be stably supported underground. Also, by externally exerting external pressure on the outer periphery of the construction, prestress for resisting against the internal pressure by the pressurized fluid. Therefore, tensile stress can be reduced to prevent cracks and so forth to stabilize the function of the pressure-proof underground construction.
Also, between the heavy mud filled and the external soil, the isolation screen may be provided by the carbon fiber, glass fiber and so forth.
Alternatively, the isolation screen may be formed of thin iron pipe. Further, a water-proof sheet for covering work of tunnels may be employed as the isolation screen.
By this, the heavy mud may be isolated from the underground water of the spoil for a long period. also, by this, leakage of the heavy mud can be easily prevented.

Claims (6)

WHAT IS CLAIMED IS:
1. A stabilizing structure for a pressure-proof underground construction for storing pressurized fluid therein, comprising: heavy mud filled around said pressure-proof underground construction.
2. The stabilizing structure for a pressure-proof underground construction as set forth in claim 1, wherein said heavy mud is liquid having specific gravity substantially equal to or smaller than unit weight of circumferential soil surrounding said pressure-proof underground construction.
3. The stabilizing structure for a pressure-proof underground construction as set forth in claim 1, said heavy mud is liquid having property subject to Pascal's principle at ordinary temperature or temperature zone in which the stored fluid in the under ground construction would be kept.
4. The stabilizing structure for a pressure-proof underground construction as set forth in claim 1, wherein a screen member is disposed between said heavy mud filled around said pressure-proof underground construction and the circumferential soil.
5. A stabilizing structure for a pressure-proof underground construction for storing pressurized fluid therein, comprising: supporting medium fluid having high specific gravity being filled around said pressure-proof underground construction.
6. A stablizing structure for a pressure-proof underground construction for storing pressurized fluid therein, substantially as herein described and as illustrated in the accompanying drawings.
GB9426365A 1994-12-29 1994-12-29 Stabilizing structure of pressure-proof underground constrution Expired - Fee Related GB2296557B (en)

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Application Number Priority Date Filing Date Title
GB9426365A GB2296557B (en) 1994-12-29 1994-12-29 Stabilizing structure of pressure-proof underground constrution

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GB9426365D0 GB9426365D0 (en) 1995-03-01
GB2296557A true GB2296557A (en) 1996-07-03
GB2296557B GB2296557B (en) 1998-11-25

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1464885A3 (en) * 2003-03-31 2006-03-15 Dresser-Rand Company A compressed gas utilisation system and method with sub-sea gas storage
CN102155604A (en) * 2010-12-31 2011-08-17 盛泽能源技术有限公司 Large-aperture compressed natural gas storage well and installation method thereof
US8955643B2 (en) 2011-04-20 2015-02-17 Dresser-Rand Company Multi-degree of freedom resonator array
CN115218112A (en) * 2022-07-07 2022-10-21 西安热工研究院有限公司 Vertical shaft of gravity compressed air energy storage system for unconsolidated formation and energy storage system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0712793B1 (en) * 1994-11-17 1998-03-04 Ing. Nino Ferrari - Impresa Costruzioni Generali S.r.l. Underground tank for storage of liquids at ambient temperature and low temperature liquified gases

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1464885A3 (en) * 2003-03-31 2006-03-15 Dresser-Rand Company A compressed gas utilisation system and method with sub-sea gas storage
CN102155604A (en) * 2010-12-31 2011-08-17 盛泽能源技术有限公司 Large-aperture compressed natural gas storage well and installation method thereof
CN102155604B (en) * 2010-12-31 2013-03-20 盛泽能源技术有限公司 Large-aperture compressed natural gas storage well and installation method thereof
US8955643B2 (en) 2011-04-20 2015-02-17 Dresser-Rand Company Multi-degree of freedom resonator array
CN115218112A (en) * 2022-07-07 2022-10-21 西安热工研究院有限公司 Vertical shaft of gravity compressed air energy storage system for unconsolidated formation and energy storage system
CN115218112B (en) * 2022-07-07 2024-06-11 西安热工研究院有限公司 Vertical shaft of gravity compressed air energy storage system for unconsolidated formation and energy storage system

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Publication number Publication date
GB2296557B (en) 1998-11-25
GB9426365D0 (en) 1995-03-01

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