JPS5820870A - Method of constructing underground storage tank - Google Patents
Method of constructing underground storage tankInfo
- Publication number
- JPS5820870A JPS5820870A JP56118178A JP11817881A JPS5820870A JP S5820870 A JPS5820870 A JP S5820870A JP 56118178 A JP56118178 A JP 56118178A JP 11817881 A JP11817881 A JP 11817881A JP S5820870 A JPS5820870 A JP S5820870A
- Authority
- JP
- Japan
- Prior art keywords
- caisson
- storage tank
- water
- underground storage
- tip
- 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.)
- Granted
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はＬＮＧ （液化天然ガス）等の地下式貯槽の構
築工法に関するものでケーソンの先端にウォータージェ
ット装置を取り付け、このウォーターシェツト装置の噴
出力でケーソンの先端地盤を掘削しながらケーソンを沈
設すると共にケーソン内部の上は水中にて掘削しながら
排土し、底盤も水中にて構築して貯槽躯体を構築し、躯
体内の排水を行ったのちこの躯体内にタンクを構築する
ように構成したことが特徴である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing an underground storage tank for LNG (liquefied natural gas), etc. A water jet device is attached to the tip of a caisson, and the jetting force of this water jet device is used to spray the ground at the tip of the caisson. While excavating the caisson, the upper part of the caisson was excavated while being submerged, and the bottom plate was also constructed underwater to construct the storage tank frame. After draining the water inside the frame, It is distinctive in that it is configured to build a tank.
ＬＮＧ地下式貯槽の構築工法を例にとると”、第１図に
示すように貯槽構築箇所の周囲に不透水層、ａに到達す
る止水壁（パイル）ｂを打ち込んで周囲からの地下水を
遮断し、止水壁内の地下水はディープウェルＣを利用し
て地上に揚水し、ドライな状態で地盤を掘削しながら側
壁ｄ１底盤などを構築しているが、この工法の場合、止
水壁Ｃの工事期間、工費の割合が大きいと共に揚水設備
、コストも高くつく欠点がある。Taking the construction method of an underground LNG storage tank as an example, as shown in Figure 1, an impermeable layer is built around the storage tank construction point, and a cut-off wall (pile) b is built to reach point a to drain groundwater from the surrounding area. The groundwater inside the water stop wall is pumped to the ground using Deep Well C, and the side wall d1 base etc. are constructed while excavating the ground in a dry state. The disadvantage of method C is that the construction period and cost are high, and the pumping equipment and cost are also high.
本発明は斯かる点に鑑みて提案されるもので、その実施
例を第２Ｘ３図に基づき説明すると、ｌは沈設後は貯槽
の側壁となるケーソンにして、この先端２にはウォータ
ージェット装置３が全周に−亘って取り付けてあり、ま
たこのウォータージェット装置３に至るウォータージェ
ット管４はケーソン１内に挿通しである。The present invention has been proposed in view of these points, and an embodiment thereof will be explained based on FIG. 2 A water jet pipe 4 leading to the water jet device 3 is inserted into the caisson 1.
上記構成のケーソンｌを設置箇所に移動し、ウォーター
ジェット管４を介してウォータージエツ計装置３からジ
ェット噴出を行うと、ケーソン１の先端２の下方の地盤
が掘削される。ケーソン１はこの掘削の進行に合わせて
その自重又は地上のジヤツキにより性行される。そして
、一つ目のケーソン１の性行が進んだなら、この上に同
径の二つ目のケーソン１′を接続し、性行を継続しなか
ら辻参≠十捲曙ケーソン１．１′・・・内の土をそのま
ま水中で掘削し、地上に排土する。When the caisson 1 having the above-mentioned configuration is moved to the installation location and a jet is ejected from the water jet measuring device 3 via the water jet pipe 4, the ground below the tip 2 of the caisson 1 is excavated. As the excavation progresses, the caisson 1 is moved by its own weight or by jacks on the ground. When the sex of the first caisson 1 has progressed, connect the second caisson 1' of the same diameter on top of it and continue the sex. '...The soil inside is excavated underwater and discharged onto the ground.
ケーソン１、■４・内の掘削が底盤構築箇所まで進行し
たなら、第３図に示すようにその箇所に水中コンクリー
トを打設して底盤５を構築する。Once the excavation of the caissons 1 and 4 has progressed to the location where the base will be constructed, underwater concrete will be placed at that location to construct the base 5, as shown in Figure 3.
なお、必要な場合にはケーソン１の先端２にはあらかじ
め鉄筋６を埋め込んでおき、底盤５とケーソン１の先端
２との結合が強固になるように配慮しておく。If necessary, reinforcing bars 6 are embedded in the tip 2 of the caisson 1 in advance so that the connection between the bottom plate 5 and the tip 2 of the caisson 1 is strong.
上記工法により貯槽躯体が構築できたなら、その内部の
水を揚水ボン／を利用して′全部地上に排水し、この内
部にタンクの構築を行う。Once the storage tank frame has been constructed using the above construction method, all of the water inside the tank is drained to the ground using a pumping tank, and a tank is constructed inside the tank.
よって本発明によれば従来のように止水壁にて地下水を
止めて地盤を掘削するのではないので、止水壁の構築期
間、工費の削減を図ることができると共にディープウェ
ル等を利用しての揚水を行わないので、この点に於いて
も工費の削減を図ることができる。Therefore, according to the present invention, since the underground water is not stopped by a water cutoff wall and the ground is excavated as in the conventional method, it is possible to reduce the construction period and construction cost of the water cutoff wall, and it is also possible to use deep wells, etc. Since no water is pumped at all, construction costs can be reduced in this respect as well.
第１図は従来の地下式貯槽の構築工法を示す説明図、第
２図、第３図は本発明に係る構築工法の説明図である。
■、１′・・・・・ ケーソン、２・・・・・先端、３
・・・・・ウォータージェット装置、′４・・・・・
ウォータージェット管、５・・・・・ 底盤、６・・・
・・ 鉄筋。
特許出願人 東京瓦斯株式会社FIG. 1 is an explanatory diagram showing a conventional underground storage tank construction method, and FIGS. 2 and 3 are explanatory diagrams of a construction method according to the present invention. ■, 1'...Caisson, 2...Tip, 3
...Water jet device,'4...
Water jet tube, 5... Bottom plate, 6...
... Rebar. Patent applicant Tokyo Gas Co., Ltd.
Claims (1)
このウォータージェット装置の噴出力でケーソンの先端
地盤を掘削しながらケーソンを沈設すると共にケーソン
内部の土は水中にて掘削しながら排土し、底盤も水中に
て構築して貯槽躯体を構築し、躯体内の排水を行ったの
ちこの躯体内にタンクを構築する地下式貯槽の構築工法
。Attach a water jet device to the tip of the caisson.
Using the jet power of this water jet device, the ground at the tip of the caisson is excavated and the caisson is lowered, and the soil inside the caisson is removed while being excavated underwater, and the bottom plate is also constructed underwater to construct the storage tank frame. An underground storage tank construction method in which a tank is built inside the structure after draining water from the structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56118178A JPS5820870A (en) | 1981-07-28 | 1981-07-28 | Method of constructing underground storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56118178A JPS5820870A (en) | 1981-07-28 | 1981-07-28 | Method of constructing underground storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5820870A true JPS5820870A (en) | 1983-02-07 |
| JPS6331633B2 JPS6331633B2 (en) | 1988-06-24 |
Family
ID=14730061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56118178A Granted JPS5820870A (en) | 1981-07-28 | 1981-07-28 | Method of constructing underground storage tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5820870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084351A (en) * | 1994-06-22 | 1996-01-09 | Kajima Corp | Construction method of underground tank |
| GB2316767B (en) * | 1995-06-01 | 1999-09-29 | Joshua David Silver | An optical apparatus and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4972275A (en) * | 1989-02-22 | 1990-11-20 | Ford Motor Company | Wideband radio-frequency broadcast recorder and radio testing system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132870A (en) * | 1979-04-02 | 1980-10-16 | Mitsubishi Heavy Ind Ltd | Method of sequentially constructing underground tank |
-
1981
- 1981-07-28 JP JP56118178A patent/JPS5820870A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132870A (en) * | 1979-04-02 | 1980-10-16 | Mitsubishi Heavy Ind Ltd | Method of sequentially constructing underground tank |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH084351A (en) * | 1994-06-22 | 1996-01-09 | Kajima Corp | Construction method of underground tank |
| GB2316767B (en) * | 1995-06-01 | 1999-09-29 | Joshua David Silver | An optical apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6331633B2 (en) | 1988-06-24 |
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