JPS5952273B2 - Construction method of underground tank - Google Patents
Construction method of underground tankInfo
- Publication number
- JPS5952273B2 JPS5952273B2 JP52031168A JP3116877A JPS5952273B2 JP S5952273 B2 JPS5952273 B2 JP S5952273B2 JP 52031168 A JP52031168 A JP 52031168A JP 3116877 A JP3116877 A JP 3116877A JP S5952273 B2 JPS5952273 B2 JP S5952273B2
- Authority
- JP
- Japan
- Prior art keywords
- peripheral wall
- tank
- cylindrical peripheral
- construction method
- ground
- 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
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】
本発明は、低温液化ガスその他各種液体を貯蔵する地下
タンク、特にタンク本体をプレストレストコンクリート
構造にした地下タンクの建設法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underground tank for storing low-temperature liquefied gas and other various liquids, and particularly to a construction method for an underground tank in which the tank body has a prestressed concrete structure.
従来、地下タンクの建設に際しては、あらかじめタンク
建設の予定位置に、そのタンクを埋設できる穴を堀り、
その穴の中で地上タンクを組立てる要領でタンク本体を
組み、しかるのち周囲を埋めもどしてそれを地下タンク
にするきわめて一般的な工法をはじめ、あらかじめタン
ク本体を地上で組み、しかるのちそのタンクの底部地盤
を掘削して、そのタンク本体の自重を利用して地中に埋
設して地下タンクとする工法やタンク本体の組立てとタ
ンク底部の地盤掘削とを交互に繰返しながら行う工法と
か、いろいろな工法が提唱されている。Traditionally, when constructing an underground tank, a hole was dug in advance at the planned location for the tank to be buried.
There is a very common method of assembling the tank body in the same way as an above-ground tank in the hole, and then filling the surrounding area to make it into an underground tank. There are various methods such as excavating the ground at the bottom and using the weight of the tank body to bury it underground to create an underground tank, and methods that alternately repeat the assembly of the tank body and excavating the ground at the bottom of the tank. A construction method has been proposed.
しかし、いずれの工法も一長一短があり、特に地盤が軟
弱であったり湧水の激しい地盤における適切な工法は今
だ開発されていないのが現状である。However, each construction method has its advantages and disadvantages, and the current situation is that no suitable construction method has been developed so far, especially in areas where the ground is soft or where there is a lot of spring water.
本発明は、これら従来工法のもつ一長一短を配慮し、特
に前述軟弱地盤地域における地下タンク建設に最適な工
法を提供することを目的とするものである。The present invention takes into consideration the advantages and disadvantages of these conventional construction methods, and aims to provide a construction method that is particularly suitable for constructing underground tanks in the above-mentioned areas of soft ground.
この発明工法の特徴とするところは、まず建設すべき地
下タンクの周壁に沿う円周上の一定間隔位置に、あらか
じめ支持杭等で補強した架台を設けるとともに、前記架
台にて囲まれた円形地盤域にウェルポイント工法ないし
デープウエルエ法等により地下水位の低位処理を施しな
がら、地盤上でタンク本体を構成する円筒周壁部を組立
て、しかるのちその円筒周壁部を前記架台より懸吊させ
、その状態で地盤を掘削し、その掘削に応じて前記円筒
周壁部を除々に降下させ所定深さ位置まで掘削降下させ
たのち、タンク本体の支持基礎の施工を行うとともに、
タンク本体の底板および屋根部分を前記円筒周壁部に一
体的に組付けて地下タンクとするものである。The feature of this invention construction method is that first, frames reinforced with support piles, etc. are installed in advance at regular intervals on the circumference along the peripheral wall of the underground tank to be constructed, and the circular ground surrounded by the frames is The cylindrical peripheral wall that constitutes the tank body is assembled on the ground while lowering the groundwater level using the well point construction method or deep well method, etc., and then the cylindrical peripheral wall is suspended from the pedestal and left in that state. After excavating the ground and gradually lowering the cylindrical peripheral wall according to the excavation to a predetermined depth, constructing a support foundation for the tank body,
The bottom plate and roof portion of the tank body are integrally assembled to the cylindrical peripheral wall portion to form an underground tank.
さらにこれを実施例に基づいて具体的に説明すると次の
通りである。Further, this will be explained in detail based on examples as follows.
なお、本実施例において□は、タンク本体をプレストレ
ストコンクリート構造のタンクとし、以下の手順要領で
組立て建設した。In this example, □ had a tank body having a prestressed concrete structure, and was assembled and constructed according to the following procedure.
まず、第１図および第２図で示すように建設すべき地下
タンクの周壁に沿う円周上の一定間隔位置に、あらかじ
め支持杭１を打設し、このヘッド上に架台２を設ける。First, as shown in FIGS. 1 and 2, support piles 1 are driven in advance at regular intervals on the circumference along the peripheral wall of an underground tank to be constructed, and a pedestal 2 is installed on the head of the support piles 1.
なお、この支持杭１および架台２は、後述する地下タン
クの円筒周壁部３を懸吊降下させる場合の架台として利
用するもので゛ある。The support pile 1 and pedestal 2 are used as a pedestal for suspending and lowering a cylindrical peripheral wall 3 of an underground tank, which will be described later.
したがって、その支持力は円筒周壁部３の重量負荷に対
抗し得るものであることが必要である。Therefore, it is necessary that the supporting force is capable of resisting the weight load of the cylindrical peripheral wall portion 3.
次に、この架台で囲まれた円形地盤域４の地下水位をウ
ェルポイントまたはデープウエルエ法により低下させる
作業を行う。Next, work is carried out to lower the groundwater level in the circular ground area 4 surrounded by this frame using the well point or deep well method.
図において５がそのデープウエル、６が揚水ポンプであ
る。In the figure, 5 is the deep well, and 6 is the pump.
なお、この地下水位の低位化処理は、後述する円形地盤
域４を掘削作業する場合、湧水によるその作業の支障を
排除するためのもので作業環境をドライ状態に保持する
ことを目的とするものである。This groundwater level lowering process is intended to keep the work environment dry when excavating the circular ground area 4, which will be described later, in order to eliminate any hindrance to the work due to spring water. It is something.
したがって、地盤水脈の状況に応じて適宜調整を行い、
その低位化処理を行う。Therefore, we will make appropriate adjustments depending on the ground water vein situation.
Perform the lowering process.
上記、地下水位の低位化作業と併行し、地盤面４上で、
第３図、第４図に示すようにタンク本体の円筒周壁部３
を通常の地上組立作業の要領で行う。In parallel with the work to lower the groundwater level mentioned above, on ground level 4,
As shown in Figs. 3 and 4, the cylindrical peripheral wall portion 3 of the tank body
be carried out in the same way as normal ground assembly work.
なお、実施例では前述した通りプレストレストコンクリ
ート構造としたため、円筒周壁部３の円周方向および軸
線方向にあらかじめＰＣ網線を通したシース管を配管し
、周壁部コンクリートの打設が完了した時点で、しかる
べくプレストレスをかけ、円筒周壁部３をＰＣ構造とす
る。In addition, in the example, since the prestressed concrete structure was used as described above, a sheath pipe through which PC wire was passed was installed in the circumferential direction and axial direction of the cylindrical peripheral wall 3, and when the concrete casting of the peripheral wall was completed, , by applying appropriate prestress to make the cylindrical peripheral wall portion 3 into a PC structure.
一方前記各架台２上に、第４図で示す通り懸吊用ワイヤ
ー７をガイドするガイドローラ８を設け、このガイドロ
ーラ８を介してワイヤー７の先端を円筒周壁部３の下端
外周部９に連結する。On the other hand, a guide roller 8 for guiding the suspension wire 7 is provided on each of the mounts 2, as shown in FIG. Link.
なお、ワイヤー７の先端を連結するため円筒周壁部３の
下端外周部９に、あらかじめフック１０が固着されてい
る。Note that a hook 10 is fixed in advance to the lower end outer circumferential portion 9 of the cylindrical circumferential wall portion 3 in order to connect the tips of the wires 7.
また、実施例ではワイヤー７を図示の通りウィンチ１１
に接続し、このウィンチ１１によりワイヤー７を巻き下
し操作するようになっている。In addition, in the embodiment, the wire 7 is connected to the winch 11 as shown in the figure.
This winch 11 is used to unwind and operate the wire 7.
以上ワイヤー７の円筒周壁部３に対する連結が終了する
と、その円筒周壁部３の下部地盤面４の掘削を開始する
。When the connection of the wire 7 to the cylindrical peripheral wall 3 is completed, excavation of the lower ground surface 4 of the cylindrical peripheral wall 3 is started.
その際、前記円筒周壁部３は、その円筒周壁部３を囲む
ように配設された架台２を介してワイヤー７により懸吊
された状態となるため掘削分に応じて各ワイヤー７を巻
き下し、円筒周壁部３を除々に吊りおろす（第５図参照
）。At this time, the cylindrical peripheral wall 3 is suspended by the wires 7 via the frame 2 disposed so as to surround the cylindrical peripheral wall 3, so each wire 7 is wound down according to the amount of excavation. Then, gradually lower the cylindrical peripheral wall 3 (see Fig. 5).
掘削する地盤域４の地下水位はあらかじめ低位化処理を
施されているため湧水による作業上の障害はない。Since the groundwater level in the ground area 4 to be excavated has been lowered in advance, there is no problem with the work due to spring water.
掘削と円筒周壁部３の降下とを繰返し、円筒周壁部３を
所定の深さ位置まで降下させ第６図の状態にする。The excavation and lowering of the cylindrical peripheral wall 3 are repeated to lower the cylindrical peripheral wall 3 to a predetermined depth position, resulting in the state shown in FIG.
次にタンク本体の基礎１２およびタンク底板１８の組付
作業を行う。Next, the foundation 12 of the tank body and the tank bottom plate 18 are assembled.
なお、この場合地盤の条件により相違するが、耐力が不
足する場合は、それに応じて支持杭を打設する。Note that this will vary depending on the ground conditions, but if the bearing capacity is insufficient, support piles will be driven accordingly.
また湧水の多い地盤にあっては揚水圧によるタンク本体
の浮上防止のため重力方式その他による浮上防止構造と
する。In addition, if the tank is located on a ground with a lot of spring water, a structure will be used to prevent the tank body from floating due to pumping pressure, such as by gravity.
実施例では、第７図で示す通り支持杭１４を打設し、か
つ湧水に対する重力式による浮上防止構造を採用した。In the example, as shown in FIG. 7, support piles 14 were driven, and a gravity-type floating prevention structure against spring water was adopted.
以上、タンク基礎１２とタンク底板１８との組立施工が
完了すると、最後に屋根１５を組付は地下タンク全体の
組立建設を終了するものである。Once the tank foundation 12 and tank bottom plate 18 have been assembled as described above, the roof 15 is finally assembled to complete the assembly and construction of the entire underground tank.
さて本発明工法の利点特徴とするところは、以上説明し
たことから理解されると思うが、建設すべき地下タンク
の本体を地盤面上で組立て、しかもそれを一種の開放潜
函として地盤面を掘削し、その掘削分に応じて順次地中
に降下させ地下タンクとして構築する工法であるため、
冒頭に説明したような従来工法に比較して場所をとらず
工期の短縮が可能である。Now, the advantageous feature of the construction method of the present invention, as you can understand from the above explanation, is that the main body of the underground tank to be constructed is assembled on the ground surface, and the ground surface is excavated using it as a kind of open container. However, since this is a construction method in which the tank is constructed as an underground tank by lowering it into the ground in stages according to the amount of excavation,
Compared to the conventional construction method as explained at the beginning, it takes up less space and can shorten the construction period.
特に本工法は、地下水の低位化処理を行い地盤の掘削域
をドライな状態に維持上、あらかじめ地盤面上で組んだ
タンク本体を懸吊降下させる工法を採用するものである
から、軟弱地盤、および湧水の激しい地盤等における地
下タンクの建設工法として、きわめて有効適切な工法で
ある。In particular, this construction method lowers the level of groundwater and keeps the excavated area dry by suspending and lowering the tank body, which has been assembled in advance on the ground surface. This is an extremely effective and suitable method for constructing underground tanks in areas where there is strong spring water.
図は本発明工法の実施例を工程順に説明するもので、第
１，２図は、建設すべきタンクの円筒周壁部の外周りに
沿った位置に打設した支持杭（円筒周壁部の懸吊支持）
と地下水位の低位化処理を行うためのデープウエルの配
置要領図、第３図は円筒周壁部を組立てた状態を示す正
面図、第４図および第５図は前記円筒周壁部を懸吊降下
させながら地盤掘削の工程を示す正面図、第６図は円筒
周壁部を所定深さ位置まで降下させた状態を示す正面図
、第７図は基礎工およびタンク底板の施工終了工程を示
す正面図、第８図は全工程完了時の正面図である。
１・・・・・・円筒層壁部懸吊用支持杭、２・・・・・
・架台、３・・・・・・円筒周壁部、４・・・・・・地
盤、５・・・・・・デープウエル、６・・・・・・揚水
ポンプ、７・・・・・・懸吊ワイヤー、８・・・・・・
・・・ガイドローラ、９・・凹円筒周壁下端外周部、１
０・・・・・・ワイヤーフック、１１・曲・ウィンチ、
１２・・・・・・基礎工、１３・曲・タンク底板、１４
・・・・・・支持杭。The figures explain an embodiment of the construction method of the present invention in the order of steps. hanging support)
Figure 3 is a front view showing the cylindrical peripheral wall assembled, and Figures 4 and 5 are diagrams showing how the cylindrical peripheral wall is suspended and lowered. Figure 6 is a front view showing the process of ground excavation, Figure 6 is a front view showing the cylindrical peripheral wall lowered to a predetermined depth, Figure 7 is a front view showing the completion process of foundation work and tank bottom plate construction, FIG. 8 is a front view when all steps are completed. 1...Support pile for hanging the cylindrical layer wall, 2...
・Frame, 3... Cylindrical peripheral wall, 4... Ground, 5... Deep well, 6... Lifting pump, 7... Suspension Hanging wire, 8...
... Guide roller, 9 ... Concave cylindrical peripheral wall lower end outer periphery, 1
0...Wire hook, 11, song, winch,
12...Foundation work, 13.Curve/tank bottom plate, 14
・・・・・・Support pile.
Claims (1)
隔位置に、あらかじめ支持杭等で補強した架台を設ける
とともに前記架台にて囲まれた円形地盤域にウェルポイ
ント工法ないしデープウエル工法等により地下水位の低
位化処理を施しながら、地盤上でタンク本体を構成する
円筒周壁部を組立て、しかるのちその円筒周壁部を前記
架台より懸吊させ、その状態で地盤を掘削し、その掘削
に応じて前記円筒周壁部を除々に降下させ所定深さ位置
まで掘削降下したのち、タンク本体の支持基礎施工を行
うとともに、タンクの本体の底板および屋根部分を前記
円筒周壁部分に一体的に組付けることを特徴とする地下
タンクの建設法。1 Install frames reinforced with support piles, etc. in advance at regular intervals on the circumference along the peripheral wall of the underground tank to be constructed, and drain underground water into the circular ground area surrounded by the frames using the well point construction method or deep well construction method, etc. Assembling the cylindrical peripheral wall that constitutes the tank body on the ground while lowering the height of the tank, then suspending the cylindrical peripheral wall from the frame, excavating the ground in this state, and After the cylindrical peripheral wall is gradually lowered and excavated to a predetermined depth, a support foundation for the tank body is constructed, and the bottom plate and roof portion of the tank body are integrally assembled to the cylindrical peripheral wall. Features of underground tank construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52031168A JPS5952273B2 (en) | 1977-03-23 | 1977-03-23 | Construction method of underground tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52031168A JPS5952273B2 (en) | 1977-03-23 | 1977-03-23 | Construction method of underground tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53116521A JPS53116521A (en) | 1978-10-12 |
| JPS5952273B2 true JPS5952273B2 (en) | 1984-12-19 |
Family
ID=12323897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52031168A Expired JPS5952273B2 (en) | 1977-03-23 | 1977-03-23 | Construction method of underground tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952273B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62184276A (en) * | 1986-02-06 | 1987-08-12 | ブサ−ク プルス ルイツケン ゲ−エムベ−ハ− ウント カンパニ− | Scraper device |
| JPH03503672A (en) * | 1988-06-29 | 1991-08-15 | ブザック＋ルイケン ゲー・エム・ベー・ハー ウント コー | sealing device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030003147A (en) * | 2002-10-30 | 2003-01-09 | 김윤상 | Piles and Footing Construction Method Using Caisson as Waterproofing, Temporary Retaining Well and Concrete Form in Bridge Construction |
-
1977
- 1977-03-23 JP JP52031168A patent/JPS5952273B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62184276A (en) * | 1986-02-06 | 1987-08-12 | ブサ−ク プルス ルイツケン ゲ−エムベ−ハ− ウント カンパニ− | Scraper device |
| JPH03503672A (en) * | 1988-06-29 | 1991-08-15 | ブザック＋ルイケン ゲー・エム・ベー・ハー ウント コー | sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53116521A (en) | 1978-10-12 |
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