JPH0615909Y2 - Leakage prevention structure of underground storage tank around the shaft - Google Patents
Leakage prevention structure of underground storage tank around the shaftInfo
- Publication number
- JPH0615909Y2 JPH0615909Y2 JP4348188U JP4348188U JPH0615909Y2 JP H0615909 Y2 JPH0615909 Y2 JP H0615909Y2 JP 4348188 U JP4348188 U JP 4348188U JP 4348188 U JP4348188 U JP 4348188U JP H0615909 Y2 JPH0615909 Y2 JP H0615909Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- underground storage
- storage tank
- sealing
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002265 prevention Effects 0.000 title claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 28
- 239000011435 rock Substances 0.000 claims description 9
- 239000011382 roller-compacted concrete Substances 0.000 claims description 8
- 239000011440 grout Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、石油類などエネルギー源の地下貯槽、とく
に、ＬＰＧの高圧貯蔵に適した地下貯槽に関し、立坑周
辺からの高圧の揮発成分の漏気を防止するようにしたも
のである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an underground storage tank for energy sources such as petroleum, and particularly to an underground storage tank suitable for high-pressure storage of LPG. This is to prevent the mind.
液体燃料の地下貯槽においては、揮発成分の漏気防止が
重要な課題である。立坑周辺では掘削によって岩盤がゆ
るむことや、巻立コンクリートの収縮によって周辺地盤
との密着が弱くなることなどから、漏気しやすくなる、
という問題があった。In underground storage tanks for liquid fuels, prevention of air leakage of volatile components is an important issue. In the vicinity of the shaft, excavation loosens the rock, and contraction of the rolled concrete weakens the close contact with the surrounding ground.
There was a problem.
そこで、従来の地下貯槽における漏気防止対策として
は、地下貯槽の上部岩盤に設置した水封トンネルや水封
ボーリングから一定の圧力を有する水封水を周辺岩盤に
供給する方法がとられていた。Therefore, as a conventional measure to prevent air leaks in underground storage tanks, a method has been taken in which water sealing water with a certain pressure is supplied to surrounding rocks from a water sealing tunnel installed in the upper rock of the underground storage or a water sealing boring. .
ところが、上記のような水封システムによる漏気防止対
策においては、水封トンネル・水封ボーリングと立坑と
が無関係な位置に設置されていたため、最も漏気しやす
い立坑周辺の岩盤に確実に水封水を供給することができ
ない、という欠点を有していた。とくに、ＬＰＧのよう
な高圧貯蔵に対しては、高い圧力のベーパーが地下貯槽
内に発生するため、従来の水封システムでは十分に対処
することができなかった。However, in the measures to prevent air leaks using the water-sealing system as described above, the water-sealing tunnel / water-sealing boring and the vertical shaft were installed at positions unrelated to each other. It had a drawback that it could not supply sealing water. Particularly, for high-pressure storage such as LPG, a high-pressure vapor is generated in the underground storage tank, so that the conventional water sealing system cannot sufficiently cope with it.
本考案は、上記課題を解決するためになされたもので、
その技術的手段は、 地下貯槽の直上に適宜間隔で水封トンネルを掘削形成
し、該水封トンネルを貫通して立坑を配置するととも
に、 該立坑を中空のケーシングパイプと巻立コンクリートと
で構成し、前記水封トンネル内の水封水と隔絶する構
造、 としたものである。The present invention has been made to solve the above problems,
The technical means is to excavate and form water-sealed tunnels directly above the underground storage tank at appropriate intervals, arrange vertical shafts through the water-sealed tunnels, and construct the vertical shafts with hollow casing pipes and rolled concrete. However, the structure is such that it is isolated from the water sealing water in the water sealing tunnel.
地下貯槽の直上に適宜間隔で水封トンネルを掘削形成
し、該水封トンネルを貫通して立坑を配置することによ
り、水封水が確実に周辺岩盤に浸透して漏気を防止す
る。このとき、地下貯槽と水封トンネルとの間隔は、水
封水の有する圧力により周辺岩盤への十分な浸透性が得
られ、かつ、ベーパーの圧力に十分対抗できる気密性が
得られるように設定する。Water sealing tunnels are excavated and formed at appropriate intervals directly above the underground storage tank, and vertical shafts are arranged so as to penetrate the water sealing tunnel, whereby the water sealing water surely permeates the surrounding bedrock to prevent air leakage. At this time, the space between the underground storage tank and the water-sealing tunnel is set so that the pressure of the water-sealing water provides sufficient permeability to the surrounding rock mass and air-tightness that can sufficiently counter the pressure of the vapor. To do.
また、立坑を中空のケーシングパイプと巻立コンクリー
トとで構成し、水封トンネル内の水封水を隔絶する構造
としたので、水封水が立坑内に侵入することなく、立坑
の機能を確保することができる。In addition, the vertical shaft is composed of a hollow casing pipe and rolled concrete, and has a structure that isolates the water sealing water in the water sealing tunnel, thus ensuring the function of the vertical shaft without the water sealing water entering the vertical shaft. can do.
以下、本考案の一実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図に示すように、地下貯槽(1)は地下60ないし150メ
ートルの深さの岩盤内に掘削形成される。As shown in Fig. 1, the underground storage tank (1) is excavated and formed in the bedrock with a depth of 60 to 150 meters underground.
この地下貯槽(1)の上部には地上から鉛直に掘削形成さ
れた立坑(2)が接続されている。A shaft (2) vertically excavated from the ground is connected to the upper part of this underground storage tank (1).
この立坑(2)は、地下貯槽(1)に貯蔵されているＬＰＧの
サンプリング装置やサクションパイプ、排水ポンプ等を
収納したプロテクションパイプ（図示せず）を挿入する
ために設けられる。This vertical shaft (2) is provided for inserting a protection pipe (not shown) containing a sampling device for LPG stored in the underground storage tank (1), a suction pipe, a drainage pump and the like.
立坑(2)の構造は、中空のケーシングパイプ(4)と巻立コ
ンクリート(5)とからなり、周辺の岩盤に密着支保され
ている。The structure of the shaft (2) consists of a hollow casing pipe (4) and rolled concrete (5), and is closely supported by the surrounding rock.
なお、岩盤への密着性が不足している場合には、巻立コ
ンクリート(5)の周辺岩盤にグラウト注入を行う。If the adhesion to the bedrock is insufficient, grout is injected into the rock around the rolled concrete (5).
このような地下貯槽(1)からの漏気を防止するために、
水平の水封トンネルが多数設置される。In order to prevent air leakage from such underground storage tank (1),
Many horizontal water-sealed tunnels are installed.
本考案では、このうちの少なくとも１本の水封トンネル
(3)を地下貯槽(1)の直上に掘削形成する。In the present invention, at least one of these water-sealed tunnels is used.
(3) is excavated and formed directly above the underground storage tank (1).
この水封トンネル(3)の設置深さについては、岩盤特
性、地下貯槽(1)の設置深度、ベーパーの圧力、水封ト
ンネル(3)の断面形状などに応じて、水封水が岩盤に十
分浸透し、かつ、ベーパーの圧力に十分対抗できる気密
性が得られるように、水封水の圧力を設定する。そのた
めには、地下貯槽の深さより少なくとも50メートル以上
浅い位置とすることが望ましい。なお、ＬＰＧのベーパ
ー圧力は、成分・温度によって異なるが、5kgf/cm2以上
である。Regarding the installation depth of this water seal tunnel (3), depending on the rock characteristics, installation depth of the underground storage tank (1), vapor pressure, cross sectional shape of the water seal tunnel (3), etc. The pressure of the water-sealing water is set so that the water can sufficiently permeate and the airtightness that can sufficiently resist the pressure of the vapor can be obtained. For that purpose, it is desirable to be at least 50 meters shallower than the depth of the underground storage tank. The vapor pressure of LPG is 5 kgf / cm 2 or more, though it depends on the components and temperature.
そして第１図及び第２図に示すように、水封トンネル
(3)を貫通するように立坑(2)を配置させる。このような
配置とすることによって、漏気が最も発生しやすい立坑
周辺の岩盤に水封トンネル(3)内の水封水を直接的に供
給することができる。そして、所定の圧力、すなわち、
地下貯槽(1)と水封トンネル(3)との高低差に応じた圧力
を有する水封水が周辺岩盤を飽和状態にすることによっ
て、ベーパーの漏気を防止することができる。And as shown in FIGS. 1 and 2, a water-sealed tunnel.
The vertical shaft (2) is placed so as to penetrate through (3). With this arrangement, the water sealing water in the water sealing tunnel (3) can be directly supplied to the rock around the vertical shaft where air leakage is most likely to occur. And a predetermined pressure, that is,
Water sealing water having a pressure corresponding to the height difference between the underground storage tank (1) and the water sealing tunnel (3) saturates the surrounding bedrock to prevent vapor leakage.
なお、立坑(2)は上述の構造としたので、水封トンネル
(3)内の水封水が立坑(2)に侵入することがなく、立坑の
機能を十分に果たすことが可能になる。また、水封トン
ネル(3)内の水封水を排除することにより、立坑(2)の維
持・補修や巻立コンクリート(5)の収縮対策としてのグ
ラウト注入などの作業を水封トンネル(3)内において実
施することができる。Since the vertical shaft (2) has the above-mentioned structure, it is a water-sealed tunnel.
The water-sealing water in (3) does not enter the shaft (2), and the function of the shaft can be fully fulfilled. In addition, by eliminating water seal water in the water seal tunnel (3), operations such as maintenance and repair of the shaft (2) and grout injection to prevent shrinkage of the rolled concrete (5) can be performed. ).
本考案は、以上のように構成したので、立坑の機能を阻
害することなく、立坑周辺からの漏気を確実に防止する
ことができるとともに、水封トンネルを作業基地として
立坑のメンテナンスを容易に行うことができる、という
効果を奏する。Since the present invention is configured as described above, it is possible to reliably prevent air leaks from around the vertical shaft without hindering the function of the vertical shaft, and to facilitate maintenance of the vertical shaft using the water-sealed tunnel as a work base. The effect is that it can be performed.
第１図は本考案の実施例を示す全体断面図、第２図は第
１図におけるII−II線矢視図を示すものである。 (1)……地下貯槽、 (2)……立坑、 (3)……水封トンネル、 (4)……ケーシングパイプ、 (5)……巻立コンクリート。FIG. 1 is an overall sectional view showing an embodiment of the present invention, and FIG. 2 is a view taken along the line II-II in FIG. (1) …… Underground storage tank, (2) …… Vertical shaft, (3) …… Water-sealed tunnel, (4) …… Casing pipe, (5) …… Rolled concrete.
Claims (1)
周辺からの漏気を水封水によって防止するための構造で
あって、 前記地下貯槽の直上に適宜間隔で水平に掘削形成された
水封トンネルを貫通して前記立坑を配置するとともに、 該立坑の中空のケーシングパイプと巻立コンクリートと
から構成して、前記水封トンネル内の水封水と隔絶した
こと、 を特徴とする立坑周辺における地下貯槽の漏気防止構
造。1. A structure for preventing leakage of air from the periphery of a shaft of an underground storage tank excavated and formed in underground rock by water sealing water, which is horizontally excavated and formed directly above the underground storage tank at appropriate intervals. The vertical shaft is arranged so as to penetrate the water-sealing tunnel, and is composed of a hollow casing pipe of the vertical shaft and rolled concrete, and is isolated from the water-sealing water in the water-sealing tunnel. Leakage prevention structure for underground storage tanks in the surrounding area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4348188U JPH0615909Y2 (en) | 1988-03-31 | 1988-03-31 | Leakage prevention structure of underground storage tank around the shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4348188U JPH0615909Y2 (en) | 1988-03-31 | 1988-03-31 | Leakage prevention structure of underground storage tank around the shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01146099U JPH01146099U (en) | 1989-10-06 |
| JPH0615909Y2 true JPH0615909Y2 (en) | 1994-04-27 |
Family
ID=31269876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4348188U Expired - Lifetime JPH0615909Y2 (en) | 1988-03-31 | 1988-03-31 | Leakage prevention structure of underground storage tank around the shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615909Y2 (en) |
-
1988
- 1988-03-31 JP JP4348188U patent/JPH0615909Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01146099U (en) | 1989-10-06 |
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