JPS5996366A - Construction of water storage tank wall in underground waterstorae tank - Google Patents
Construction of water storage tank wall in underground waterstorae tankInfo
- Publication number
- JPS5996366A JPS5996366A JP57206420A JP20642082A JPS5996366A JP S5996366 A JPS5996366 A JP S5996366A JP 57206420 A JP57206420 A JP 57206420A JP 20642082 A JP20642082 A JP 20642082A JP S5996366 A JPS5996366 A JP S5996366A
- Authority
- JP
- Japan
- Prior art keywords
- water tank
- construction
- wall
- concrete
- 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.)
- 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、防火貯水槽、受水槽などに用いられる地下貯
水槽における貯水槽壁の構築方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a water tank wall in an underground water tank used as a fire protection water tank, a water receiving tank, or the like.
従来の地下貯水槽は、構築材料から、鋼製、鉄筋コンク
リート製、ＦＲＰ 製などに分類されるが。Conventional underground water tanks are classified into steel, reinforced concrete, FRP, etc. based on the construction material.
表かでも鉄筋コンクリート製地下貯水槽がその主流であ
り、構造も現場打ちＲＣ構造、現場打ちプレストレスト
コンクリート構造、あるいは工場生産のプレキャスト材
によるいわゆるプレハブＲＣ構造、プレハブプレストレ
ストコンクリート構造など多様化している。Underground water storage tanks made of reinforced concrete are the mainstream, and their structures are diversifying, including cast-in-place RC structures, cast-in-place prestressed concrete structures, so-called prefabricated RC structures made of factory-produced precast materials, and prefabricated prestressed concrete structures.
ところで、この種の鉄筋コンクリート製地下貯水槽を構
築するにあたっては、工事の設計および施工において、
安全性、確実性が要求されることは言うまでもないが、
工費の低摩、工事の短縮、建築敷地の有効利用、品質管
理の容易さ等が望まれる。By the way, when constructing this kind of reinforced concrete underground water storage tank, there are
It goes without saying that safety and reliability are required, but
It is desirable to have low construction costs, shortened construction time, effective use of building sites, and ease of quality control.
ところが、上述の各種構造のものは、それぞれ一長一短
がある。例えば、現場打ちコンクリートによる場合には
、狭隘地設置が可能であり、低コストでもあるが、コン
クリート養生に多くの時間を要し、交通量の多い場所あ
るいは住宅地の場合、工期が長びくことが問題となって
くる。一方、プレハブの場合には、品質管理が容易で、
短工期である等の利点を有する反面、各部材の重量が太
き〈狭隘地設置が困難である他、コスト高になるなどの
不都合がある。However, each of the above-mentioned structures has advantages and disadvantages. For example, cast-in-place concrete can be installed in narrow spaces and is low cost, but it takes a lot of time to cure the concrete, and the construction period may be longer if the site is in a high-traffic area or in a residential area. This becomes a problem. On the other hand, in the case of prefabricated products, quality control is easy;
Although it has advantages such as short construction period, it has disadvantages such as heavy weight of each member (difficult to install in narrow spaces) and high cost.
本発明は、以上のような点を考慮してなされたもので、
刃口部をプレハブとし、この刃口部の上部に現場打ちコ
ンクリートによって貯水槽の周壁を形成することにより
、貯水槽基部の精度向上と潜函工事の早期着工を図るこ
とができ、狭隘地への設置が容易で、しかも低コスト化
を図ることのできる地下貯水槽における貯水槽壁の構築
方法を提供することを目的とする。The present invention was made in consideration of the above points, and
By making the cutting edge part prefabricated and forming the surrounding wall of the water tank with cast-in-place concrete above the cutting edge part, it is possible to improve the accuracy of the water tank base and start construction of the submersible earlier, making it possible to use it in narrow spaces. It is an object of the present invention to provide a method for constructing a water tank wall in an underground water tank that is easy to install and can reduce costs.
以下、添付図面に従って本発明の一実施例について詳述
する。Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.
本発明による地下貯水槽における貯水槽壁の構築方法は
、先ず、第１図に示すように１工場等において予め一定
の寸法、形状に規格化して生産された例えばプレキャス
トコンクリート等からなる円弧板状でかつ内部に鉄筋（
図示せず）を含む刃口セグメント１を構築現場の地盤Ｇ
上で環状に連結して貯水槽本体の基部をなす刃口部２を
組み立てる。The method for constructing a water tank wall in an underground water tank according to the present invention is as shown in FIG. Reinforced steel inside (
(not shown)
At the top, the cutting edge portion 2, which is connected in an annular manner and forms the base of the water tank body, is assembled.
そして、この刃口部２の上部に、第２図に示すように、
内型枠３ａと外型枠３ｂとからなる貯水槽の周壁の型枠
３を配置するとともに、型枠３内に周壁の補強をなす鉄
筋ユニット４をセットする。Then, as shown in FIG.
A formwork 3 for the peripheral wall of a water tank consisting of an inner formwork 3a and an outer formwork 3b is arranged, and a reinforcing bar unit 4 for reinforcing the peripheral wall is set within the formwork 3.
なお、上記内型枠３ａは、周壁の内側て設置したウェイ
ト５との間のステー６によって支持する。The inner formwork 3a is supported by a stay 6 between it and a weight 5 installed inside the peripheral wall.
またこのウェイト５は、内型枠３ａ相互で上記ステー６
が支持できれば、特に設置する必要はない。Moreover, this weight 5 is attached to the above-mentioned stay 6 between the inner formwork 3a.
If it can be supported, there is no need to install it.
上記型枠３と鉄筋ユニット４とのセットが完了したら、
第３図に示すように、コンクリートを打設して貯水槽の
周壁７を形成する。この際、−コンクリートが上記刃口
部２と一体化して、周壁７と刃口部２とからなる貯水槽
壁Ａが構成される。Once the above formwork 3 and reinforcing bar unit 4 have been set,
As shown in FIG. 3, concrete is poured to form the peripheral wall 7 of the water tank. At this time, the -concrete is integrated with the cutting edge portion 2 to form a water tank wall A consisting of the peripheral wall 7 and the cutting edge portion 2.
次いで、上記コンクリートが適当な強度すなわち、上記
貯水槽壁Ａを地中に沈設する際の土圧に耐え得る程度の
強度に達しなくても、外型枠３ｂを脱型しうる強雇に達
したならば、ウェイト５を貯水槽壁Ａの外側に出し、さ
らに、上記コンクリートの所定強度発生以前に上記貯水
槽壁Ａ内の地盤Ｇを掘削して内部の土を外部に搬出する
。、順次、貯水槽壁Ａ内の地盤Ｇを掘削していくと一貯
水槽壁Ａは自重によシ沈下して地中に埋め込まれていく
。Next, even if the concrete does not reach an appropriate strength, that is, a strength that can withstand the earth pressure when sinking the water tank wall A into the ground, the outer formwork 3b can be demolded. Once this is done, the weight 5 is put out to the outside of the water tank wall A, and the ground G inside the water tank wall A is excavated and the soil inside is carried out to the outside before the concrete has a predetermined strength. As the ground G within the water tank wall A is excavated one after another, the water tank wall A sinks due to its own weight and is buried underground.
なお、内型枠３ａは、周壁７の保護と養生を兼ねて脱型
せずに残しておく。この潜函工事において、刃口部２は
、予め工場等において形成したプレキャストコンクリー
ト等からなる刃口セグメント１によって組み立てられて
いるため、貯水槽壁Ａの基部の精度を向上でき、しかも
周壁７の養生前に地盤Ｇの掘削を行なうことができる。Note that the inner mold frame 3a is left without being removed from the mold in order to protect and cure the peripheral wall 7. In this case construction, the cutting edge portion 2 is assembled by cutting edge segments 1 made of precast concrete or the like previously formed in a factory, etc., so that the accuracy of the base of the water tank wall A can be improved, and the curing of the peripheral wall 7 can be improved. Ground G can be excavated beforehand.
すなわち、潜函工事中、周壁７にかかる土圧は、刃口部
２の土庄よりも小さいため、匿枠の脱型後における周壁
７の強度においても、潜函工事に支障はない。したがっ
て、潜函工事の早期着工を図ることができ、しかも周壁
７が現場打ちコンクリートによって形成されるため、狭
隘地への設置が容易でまた、低コスト化も図ることがで
きる。That is, since the earth pressure applied to the surrounding wall 7 during the subcase construction is smaller than the earth pressure of the cutting edge portion 2, the strength of the circumferential wall 7 after demolding the concealment frame does not impede the subcase construction. Therefore, it is possible to start the construction of the submersible at an early stage, and since the peripheral wall 7 is formed of cast-in-place concrete, it is easy to install it in a narrow space, and it is also possible to reduce costs.
貯水槽壁Ａを地中における所定の位置まで沈下させた後
は、底板１０の施工に先立って、第５図に示すように先
ず内型枠３ａを脱型し、下から栗石、割石等の基礎材１
１および捨てコンクリートとしての基礎コンクリート１
２などを施していわゆる地盤固めを行なう。そして、地
盤固めを行なった後は、底版部分に主鉄筋１３および配
力筋１４を配筋し、コンクリートを打設して底版１０を
形成する。この際、底版１０は、図中に示すように、上
記刃口部２と周壁７との継目部よりも上げて形成するの
で、この部分の止水効果が高まる。After the water tank wall A has been lowered to a predetermined position in the ground, the inner formwork 3a is first removed from the mold as shown in FIG. 5, and a layer of chestnut stone, split stone, etc. Basic material 1
1 and foundation concrete 1 as waste concrete
2, etc., to perform so-called ground consolidation. After the ground has been solidified, main reinforcing bars 13 and distribution bars 14 are arranged in the bottom slab portion, and concrete is poured to form the bottom slab 10. At this time, as shown in the figure, the bottom plate 10 is formed higher than the joint between the blade mouth portion 2 and the peripheral wall 7, so that the water-stopping effect in this portion is enhanced.
底版１０の打設後、今度は、第６図に示すように、貯水
槽壁Ａにプレストレスを導入する。このプレストレスの
導入にあたっては、潜函工事前に予め、一端を刃口部２
のＰ−Ｃテンドン定着用面接き２ａに（第１図も参照）
、他端全周壁７の上端に固定し、かつ周壁７内でたとえ
ば図示例のように、何回から見て互いに角度をなすよう
に斜め格子状に配設したプレストレス用テンドン（Ｐ・
Ｃ撚り線）１５を用い、潜函工事後に、上記周壁７の上
端でプレストレス用テンドン１５を緊張することによシ
ブレストレスの導入を行なう。After the bottom slab 10 is cast, prestress is introduced into the water tank wall A, as shown in FIG. When introducing this prestress, one end must be placed at the blade opening 2 before construction work.
P-C tendon fixing surface 2a (see also Figure 1)
, the other end is fixed to the upper end of the entire circumferential wall 7, and prestressing tendons (P.
C stranded wire) 15 is used to introduce sible stress by tensioning the prestressing tendon 15 at the upper end of the peripheral wall 7 after the submersible box construction.
なお、上記テンドン１５の配設方法は−特に−実施例の
ものに限定されるものではなく、例えば従来のよう忙、
テンドン１５を円周方向ないし鉛直方向のみに縦横に配
設しても良いが、上述した実施例のようにすれば、潜函
工事後に周壁７の上端から周壁７の円周方向並びに上下
方向にプレストレスを導入できるので、現場での作業も
容易で作業性を向上できる。It should be noted that the method of arranging the tendons 15 is not particularly limited to that of the embodiment.
Although the tendons 15 may be arranged vertically and horizontally only in the circumferential direction or vertical direction, if the tendons 15 are arranged vertically and horizontally only in the circumferential direction or the vertical direction, if the tendons 15 are arranged in the above-mentioned embodiment, the tendons 15 can be arranged from the upper end of the peripheral wall 7 in the circumferential direction and in the vertical direction of the peripheral wall 7 after the enclosure construction. Since stress can be introduced, work on site is easier and work efficiency can be improved.
次いで、予め工場等で一定の寸法、形状に形成しておい
たプレキャストコンクリート等からなる通販セグメント
２０を貯水槽壁Ａの上部に差し渡して、第７図に示すよ
うに、地下貯水槽の通販２１を組み立てる。また、上記
通販セグメント２０は、その長さ方向に予めプレストレ
スが導入されており、通販２１の組み立て後は、通販セ
グメント２０の接平方向にプレストレスが導入される。Next, a mail-order segment 20 made of precast concrete or the like, which has been previously formed into a certain size and shape in a factory or the like, is passed over the upper part of the water tank wall A, and as shown in FIG. Assemble. Further, the mail order segment 20 is pre-stressed in its longitudinal direction, and after the mail order segment 21 is assembled, prestress is introduced in the tangential direction of the mail order segment 20.
なお、上記通販２１は、実施例のようにプレキャストし
たものを組み立てる構成としても良いが、特にこれに限
定されるものではなく、現場打ちコンクリートによって
形成する構成としても良い。Note that the above-mentioned mail order 21 may be constructed by assembling a precast product as in the embodiment, but is not particularly limited to this, and may be constructed using cast-in-place concrete.
このようにして、上記通販２１を貯水槽壁Ａの上部に据
え付け、最後に貯水槽の上部を埋め戻す。In this way, the above mail order 21 is installed on the upper part of the water tank wall A, and finally the upper part of the water tank is backfilled.
なお、同図中２２はマンホールを示している。Note that 22 in the figure indicates a manhole.
以上詳述したように、本発明は、プレキャストコンクリ
ート等からなる刃口セグメントを構築現場の地盤上で連
結して刃口部を組み立て、この刃口部の上部に型枠成形
によってコンクリートから壁内の地盤を掘削して、該貯
水槽壁を地中における所定の位置まで沈下させることを
特徴とするものであるから、基盤の精度向上と潜函工事
の早期着工を容易にすることができ、また狭隘地への設
置を容易にし、しかも低コスト化を図ることができる′
等の優れた効果を有する。As described in detail above, the present invention connects the cutting edge segments made of precast concrete or the like on the ground at the construction site to assemble the cutting edge part, and then molds the concrete into the wall by molding the upper part of the cutting edge part. The feature is that the ground is excavated and the water tank wall is sunk to a predetermined position underground, so it is possible to improve the accuracy of the foundation and facilitate the early start of submersible box construction. Easily installs in narrow spaces and reduces costs.
It has excellent effects such as
図は２本発明による地下貯水槽における貯水槽壁の構築
方法を説明する几めに示しｔもので、第１図は、刃口部
を組み立てた状態を示す半断面図、第２図は周壁の型枠
を配置し次状態を示す断面図、第３図は凰枠にコンクリ
ートを打設した状態を示す断面図、第４図は貯水槽壁の
施工状態を示す断状態を説明する断面図である。
Ｇ・・・・・・地盤、２・・・・・・刃口部、Ａ・・・
・・・貯水槽壁。The two figures are shown in a systematic manner to explain the method of constructing a water tank wall in an underground water tank according to the present invention. Figure 3 is a cross-sectional view showing the state in which concrete has been poured into the frame, and Figure 4 is a cross-sectional view showing the construction state of the water tank wall. It is. G...Ground, 2...Blade mouth, A...
...Water tank wall.
Claims (1)
横築現場の地盤上で連結して刃口部を組み立て、この刃
口部の上部に型枠成形によってコンクリートからなる貯
水槽の周壁を形成し、上記コンクリートの養生期間内に
、上記刃口部と周壁とからなる貯水槽壁内の地盤を掘削
して、該貯水槽壁を地中における所定の位置まで沈下さ
せることを特徴とする地下貯水槽における貯水槽壁の構
築方法。The cutting edge segment made of precast concrete etc. is connected on the ground at the horizontal construction site to assemble the cutting edge part, and the peripheral wall of the water tank made of concrete is formed on the upper part of the cutting edge part by form forming. A water storage tank in an underground water storage tank, characterized in that, during a curing period, the ground within the water tank wall consisting of the blade opening and the peripheral wall is excavated, and the water tank wall is lowered to a predetermined position in the ground. How to build walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57206420A JPS5996366A (en) | 1982-11-25 | 1982-11-25 | Construction of water storage tank wall in underground waterstorae tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57206420A JPS5996366A (en) | 1982-11-25 | 1982-11-25 | Construction of water storage tank wall in underground waterstorae tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5996366A true JPS5996366A (en) | 1984-06-02 |
| JPH0160634B2 JPH0160634B2 (en) | 1989-12-25 |
Family
ID=16523076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57206420A Granted JPS5996366A (en) | 1982-11-25 | 1982-11-25 | Construction of water storage tank wall in underground waterstorae tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5996366A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0497021A (en) * | 1990-08-10 | 1992-03-30 | Asahi Boukaban Kogyosho:Kk | Construction of underground structure |
-
1982
- 1982-11-25 JP JP57206420A patent/JPS5996366A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0497021A (en) * | 1990-08-10 | 1992-03-30 | Asahi Boukaban Kogyosho:Kk | Construction of underground structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0160634B2 (en) | 1989-12-25 |
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