JP2722787B2 - Underground storage tank structure - Google Patents
Underground storage tank structureInfo
- Publication number
- JP2722787B2 JP2722787B2 JP2168351A JP16835190A JP2722787B2 JP 2722787 B2 JP2722787 B2 JP 2722787B2 JP 2168351 A JP2168351 A JP 2168351A JP 16835190 A JP16835190 A JP 16835190A JP 2722787 B2 JP2722787 B2 JP 2722787B2
- Authority
- JP
- Japan
- Prior art keywords
- storage tank
- ground
- underground storage
- tank structure
- underground
- 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
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
Description
【発明の詳細な説明】 《産業上の利用分野》 この発明は、LNG,LPG等の低温液化ガスや原油などを
貯蔵するための地下式貯蔵構造物に関する。The present invention relates to an underground storage structure for storing low-temperature liquefied gas such as LNG and LPG, crude oil, and the like.
《従来の技術》 LNG,LPG等の低温液化ガスを貯蔵するための大型貯槽
構造物は、液化ガスの蒸発潜熱などによる周囲への熱的
な影響や外熱による内部への影響を防止するために地下
ないしは半地下に構築されることがある。《Conventional technology》 Large storage tank structures for storing low-temperature liquefied gas such as LNG and LPG are designed to prevent thermal effects on the surroundings due to latent heat of vaporization of the liquefied gas and effects on the inside due to external heat. May be constructed underground or semi-underground.
また、これら地下式貯槽構造物は、臨海の埋立て地に
貯蔵基地として多数基構築されることが多い。In addition, many of these underground storage tank structures are often constructed as storage bases at a seaside landfill.
この地下式貯槽構造物の構築方法には、各種の方法が
あるが、その一例として以下に説明する方法がある。There are various methods for constructing the underground storage tank structure, and one example is a method described below.
まず、連続地中壁工法によって支持地盤まで到達する
深度の地中板を円筒形に構築し、地中壁によって構築予
定地の地盤を囲い、内部掘削を行なう。First, an underground plate with a depth reaching the supporting ground is constructed in a cylindrical shape by the continuous underground wall method, and the ground at the construction site is surrounded by the underground wall, and internal excavation is performed.
次いで、地中壁の内側に逆巻きないしは順巻き工法な
どによって側壁を地中壁の内面に沿って構築する。Next, the side wall is built inside the underground wall along the inner surface of the underground wall by a reverse winding method, a forward winding method, or the like.
計画深度まで到達したら、その底部地盤上に底版を築
造し、前記側壁に接合する。Upon reaching the planned depth, a bottom slab is built on the bottom ground and joined to the side wall.
最後に上部開口を屋根で覆うとともに、内部に保冷材
と鋼板をライニングすることによって地下式貯槽構造物
が完成する。Finally, the upper opening is covered with a roof, and a refrigeration material and a steel plate are lined inside to complete the underground storage tank structure.
《発明が解決しようとする課題》 以上の地下式貯槽構造物は、前述のごとく埋立て地な
ど地下水位の高い地盤内に構築されるため、地下水の影
響を受けやすく、底部に地下水による揚圧力が作用する
方式が多い。《Problems to be solved by the invention》 Since the above-mentioned underground storage tank structure is constructed in the ground with a high groundwater level such as a landfill as described above, it is easily affected by groundwater, Works in many cases.
このため、従来は、特に、定版や側壁を耐力から必要
とされる厚み以上に大きくし、貯蔵構造物の全重量で地
下水圧に対抗させる対策が施されていた。For this reason, conventionally, measures have been taken to increase the thickness of the fixed plate and the side wall beyond the required thickness in view of the proof stress, and to counter the groundwater pressure with the total weight of the storage structure.
しかしながら、このような対策では、貯槽の内容積を
確保するためには、構造物の厚みが増す分だけ地盤を余
分に掘削する必要があり、工数が多くかかるほか、使用
材料などが増すなど工期的，コスト的に不利になってい
た。However, with such measures, in order to secure the internal volume of the storage tank, it is necessary to excavate the ground extra by the thickness of the structure, which takes a lot of man-hours and increases the material used. Was disadvantageous in terms of cost and cost.
この発明は以下の問題を解決するものであって、地下
式貯槽構造物の下部地盤に複数の杭を配置することで、
構造物を地盤内に強固に支持するとともに、杭の引抜き
抵抗により、浮き上がりなどを防止する地下式貯槽構造
物を提供することを目的としている。This invention is to solve the following problems, by arranging a plurality of piles in the lower ground of the underground storage tank structure,
It is an object of the present invention to provide an underground storage tank structure that supports a structure firmly in the ground and prevents lifting due to a pull-out resistance of a pile.
《課題を解決するための手段》 前記目的を達成するため、この発明は、地下水の存在
する地盤内に構築される底版および側壁を備えた地下式
貯槽構造物において、地下水の存在する前記底版の下部
地盤内に、下端部を拡底された定着部を有する複数の杭
を配置するとともに、これらの各杭の上端を前記底版に
結合し、浮力による前記地下式貯槽構造物の浮き上がり
を前記定着部の引き抜き抵抗と杭の周面摩擦による引き
抜き抵抗とによって防止するようにしたことを特徴とす
る。<< Means for Solving the Problems >> In order to achieve the above object, the present invention provides an underground storage tank structure having a bottom plate and a side wall constructed in the ground in which groundwater is present, wherein the bottom plate in which groundwater is present is provided. In the lower ground, a plurality of piles having a fixing part whose bottom end is expanded are arranged, and the upper end of each of these piles is connected to the bottom plate, so that the floating of the underground storage tank structure by buoyancy is fixed to the fixing part. And the pull-out resistance due to the peripheral friction of the pile.
《作 用》 以上の構成によれば、底版が下端部に拡底さた定着部
を有する複数の杭に支持されることによって、地下水圧
による浮力などに対抗して構造物を地盤内部に強固かつ
安定に支持する。<Operation> According to the above configuration, the bottom slab is supported by a plurality of piles having an anchoring portion expanded at the lower end, so that the structure can be firmly installed inside the ground against buoyancy due to groundwater pressure and the like. Support stably.
《実 施 例》 以下、この発明の一実施例を図面を用いて詳細に説明
する。<< Embodiment >> Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
第１図はこの発明による地下式貯槽構造物を示してい
る。FIG. 1 shows an underground storage tank structure according to the present invention.
図において、地盤Ｅ中には、その地表から支持地盤で
ある難透水槽E1まで到達する円筒形の連続地中壁１が設
けられている。In the figure, a continuous underground wall 1 having a cylindrical shape is provided in the ground E to reach from the surface of the ground to the impervious tank E1, which is a supporting ground.
そして、地中壁１で囲まれた内部には、地中壁１に沿
って側壁２が構築されているととともに、最深部に底版
３が構築され、底版３は、その周縁を側壁２の下部にPC
鋼棒などを介して結合されている。In the interior surrounded by the underground wall 1, a side wall 2 is constructed along the underground wall 1, and a bottom plate 3 is constructed at the deepest portion. PC at the bottom
It is connected via a steel bar or the like.
これら側壁２および底版３で囲まれた上部開口は、屋
根４によって密閉され、地下式貯槽構造物が形成されて
いる。An upper opening surrounded by the side walls 2 and the bottom plate 3 is closed by a roof 4 to form an underground storage tank structure.
なお、この構造物の内部にはメンブレンを表面材とす
る保冷材５がライニングされているほか、構造物の外側
には、図示しないが凍土制御用のヒータ、配管設備その
地付属物が設けられている。In addition, a cold insulator 5 having a membrane as a surface material is lined inside the structure, and a heater for controlling frozen soil, piping equipment and ground attachments (not shown) are provided outside the structure, although not shown. ing.
この構造物の施工手順は従来とほぼ同様であるが、本
発明では以上の構成に加えて、前記定版３の下部地盤に
は所定の深度で下端を地盤Ｅ内に定着させた複数の杭６
が配置され、各杭６の上端は前記底版３に結合される。The construction procedure of this structure is almost the same as the conventional one. In the present invention, in addition to the above configuration, a plurality of piles having a lower end fixed to the ground E at a predetermined depth are provided on the lower ground of the plate 3. 6
Are arranged, and the upper end of each pile 6 is connected to the bottom plate 3.
各杭６は、例えば、前記底版３の施工前の段階で公知
の現場打ち工法により施工されるもので、孔底部の複数
箇所の地盤Ｅを掘削するともに、その内部にコンクリー
トを充填することにより形成される。Each of the piles 6 is, for example, constructed by a well-known in-situ construction method at a stage before the construction of the bottom slab 3, and excavates a plurality of grounds E at the bottom of the hole and fills the inside with concrete. It is formed.
なお、杭６の形成方法は、この方法に限られることは
なく、既製杭を打設する方法でも良い。The method of forming the pile 6 is not limited to this method, but may be a method of driving an already-made pile.
この場合、杭６は、図中に一部拡大して示すように、
その外周を凹凸状に形成した柱部6aと、柱部6aの最下端
部において、テーパ状に拡底された定着部6bとからな
り、これら拡底された定着部6bおよび柱部6aの凹凸によ
り引抜きに対する抵抗や周面摩擦を増加するように形成
されている。In this case, the pile 6 is partially enlarged in the drawing as shown in FIG.
A pillar portion 6a having an irregular outer periphery and a fixing portion 6b having a tapered bottom at the lowermost end of the pillar portion 6a. It is formed so as to increase resistance and peripheral friction.
そして、杭６の施工後孔底部を浅く掘削し、柱部6aの
上部を露出させた状態とし、この状態で前記底版３を施
工することにより、杭６の上端は底版３に一体に結合
し、底版３の下部を複数の杭６で支持した構造物が形成
されるのである。After the pile 6 is constructed, the bottom of the hole is excavated shallowly to expose the upper part of the column 6a, and the bottom plate 3 is constructed in this state, whereby the upper end of the pile 6 is integrally connected to the bottom plate 3. Thus, a structure in which the lower portion of the bottom plate 3 is supported by the plurality of piles 6 is formed.
以上の構成において、地盤Ｅの地下水位WLが地表部に
近い高さである場合にはこの水位WLと構造物最深部の深
さの差Ｄに応じた水圧が構造物に加わり、その結果構造
物全体に浮き上げる力が加わることになるが、前記各杭
６の引抜き抵抗と、地中壁１に囲まれた内部地盤の重量
とにより前記浮力に対抗して構造物は適性位置に強固に
支持することになる。In the above configuration, when the groundwater level WL of the ground E is close to the ground surface, a water pressure corresponding to the difference D between the water level WL and the depth D of the deepest part of the structure is applied to the structure, and as a result, the structure A lifting force is applied to the entire object, but the pull-out resistance of each of the piles 6 and the weight of the internal ground surrounded by the underground wall 1 cause the structure to be firmly positioned at an appropriate position against the buoyancy. I will support you.
なお、各杭６の打ち込み本数の配置，最下端の定着部
6bの深度などは、構造物の設計や地盤Ｅの土質に応じて
設定されることは勿論である。In addition, the arrangement of the number of driving of each pile 6, the anchorage at the bottom end
Of course, the depth of 6b and the like are set according to the design of the structure and the soil properties of the ground E.
《発明の効果》 以上実施例によって詳細に説明したように、この発明
による地下式貯槽構造物にあっては、底版が複数の杭に
支持され、かつ、群杭効果による内部地盤の重量とによ
って、構造物全体を地下水圧による浮力などに対抗して
地盤内部に強固に支持されるほか、構造物重量による不
等沈下なども防止される。<< Effect of the Invention >> As described in detail in the above embodiments, in the underground storage tank structure according to the present invention, the bottom slab is supported by a plurality of piles, and the weight of the internal ground due to the group pile effect. In addition, the entire structure is firmly supported inside the ground against buoyancy due to groundwater pressure, and uneven settlement due to the weight of the structure is also prevented.
また、複数の杭の周面摩擦による引き抜き抵抗と、拡
底された定着部による引き抜き抵抗との相乗効果によっ
て、浮力による地下式貯槽構造物の浮き上がりを、効果
的に防止することができる。In addition, the lift of the underground storage tank structure due to buoyancy can be effectively prevented by the synergistic effect of the pull-out resistance due to the peripheral friction of the plurality of piles and the pull-out resistance due to the expanded fixing portion.
したがって、この発明にあっては構造物全体を地盤内
に安定に支持する手段として底版の厚みや構造物の全重
量を極端に増す必要がなく、さらに杭がバネ支承として
働き、底版発生応力を低減できるので、底版の厚みを薄
くすることが可能になり、工期，建設コストの点で有利
であり、安全性もさらに向上する。Therefore, in the present invention, it is not necessary to extremely increase the thickness of the bottom slab or the total weight of the structure as a means for stably supporting the entire structure in the ground, and furthermore, the pile acts as a spring bearing to reduce the stress generated by the bottom slab. Since the thickness can be reduced, the thickness of the bottom plate can be reduced, which is advantageous in terms of construction period and construction cost, and further improves safety.
第１図はこの発明にかかる地下式貯槽構造物の全体構成
を示す断面図である。 １……連続地中壁、２……側壁、３……底版 ６……杭、6a……柱部、6b……定着部 Ｅ……地盤FIG. 1 is a sectional view showing the entire configuration of an underground storage tank structure according to the present invention. 1 ... continuous underground wall, 2 ... side wall, 3 ... bottom plate 6 ... pile, 6a ... pillar section, 6b ... fixing section E ... ground
Claims (1)
および側壁を備えた地下式貯槽構造物において、地下水
の存在する前記底版の下部地盤内に、下端部に拡底され
た定着部を有する複数の杭を配置するとともに、これら
の各杭の上端を前記底版に結合し、浮力による前記地下
式貯槽構造物の浮き上がりを前記定着部の引き抜き抵抗
と杭の周面摩擦による引き抜き抵抗とによって防止する
ようにしたことを特徴とする地下式貯槽構造物。1. An underground storage tank structure having a bottom plate and a side wall constructed in the ground where groundwater exists, and having a fixing portion expanded at a lower end portion in a lower ground of the bottom plate where the groundwater exists. While arranging a plurality of piles, the upper ends of these piles are connected to the bottom plate, and the lifting of the underground storage tank structure due to buoyancy is prevented by the pull-out resistance of the anchoring portion and the pull-out resistance due to the peripheral friction of the pile. An underground storage tank structure, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168351A JP2722787B2 (en) | 1990-06-28 | 1990-06-28 | Underground storage tank structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168351A JP2722787B2 (en) | 1990-06-28 | 1990-06-28 | Underground storage tank structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0460069A JPH0460069A (en) | 1992-02-26 |
| JP2722787B2 true JP2722787B2 (en) | 1998-03-09 |
Family
ID=15866460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2168351A Expired - Lifetime JP2722787B2 (en) | 1990-06-28 | 1990-06-28 | Underground storage tank structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2722787B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4820642B2 (en) * | 2005-12-27 | 2011-11-24 | 株式会社竹中工務店 | Buoyancy countermeasures for dismantling existing structures |
| CN104005430B (en) * | 2014-06-10 | 2015-11-25 | 中石化上海工程有限公司 | The external block anti-float method of reinforced concrete water pond |
| CN105350582A (en) * | 2015-10-29 | 2016-02-24 | 周兆弟 | Protective structure of underground pipe gallery |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848711A (en) * | 1981-09-18 | 1983-03-22 | Nissan Motor Co Ltd | Direct injection type diesel engine |
| JPS6268929A (en) * | 1985-09-20 | 1987-03-30 | Kajima Corp | Supporting construction for building |
-
1990
- 1990-06-28 JP JP2168351A patent/JP2722787B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0460069A (en) | 1992-02-26 |
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