JPH0794740B2 - How to construct the bottom pit of the water tank - Google Patents
How to construct the bottom pit of the water tankInfo
- Publication number
- JPH0794740B2 JPH0794740B2 JP1185715A JP18571589A JPH0794740B2 JP H0794740 B2 JPH0794740 B2 JP H0794740B2 JP 1185715 A JP1185715 A JP 1185715A JP 18571589 A JP18571589 A JP 18571589A JP H0794740 B2 JPH0794740 B2 JP H0794740B2
- Authority
- JP
- Japan
- Prior art keywords
- bottom plate
- pit
- plate pit
- water tank
- hole
- 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 - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 37
- 239000004576 sand Substances 0.000 claims description 9
- 238000009415 formwork Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 9
- 239000000701 coagulant Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、地中に埋設される貯水槽において、これに貯
留されている水を最後まで吸い出すことを可能とするた
めに、その中に吸水管が挿入される貯水槽底部の窪部で
ある底板ピットを、貯水槽の底部に底板ピットを形成す
る構築方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a water tank buried in the ground so that the water stored therein can be sucked out to the end. The present invention relates to a construction method for forming a bottom plate pit, which is a recess at the bottom of a water tank into which a water absorption pipe is inserted, and a bottom plate pit at the bottom of the water tank.
従来、地中に貯水槽を形成する場合、現場で貯水槽を設
置する穴を掘り、この穴内に型枠を設置してコンクリー
トを流し込む現場打ち工法と、予め所定の形状に形成さ
れている貯水槽本体の側枠を、前記と同様な穴に設置す
るPC開削方法、潜函するPC潜函工法とがある。Conventionally, when a water storage tank is formed in the ground, a hole for installing the water storage tank is dug on site, a formwork is installed in this hole, and concrete is poured into the hole, and a water storage tank that has been previously formed into a predetermined shape There are a PC excavation method in which the side frame of the tank body is installed in the same hole as described above, and a PC submersible construction method for submersion.
このPC潜函工法においては、貯水槽の本体側枠を地中に
潜埋させた後、貯水槽の底板と同時に、前記の現場打ち
工法と同様に、底板ピットを形成する部分に穴を掘り、
型枠を組んで鉄筋を編み、これにコンクリートを投入し
て底板ピットとする方法がとられていた。In this PC submersible construction method, after burying the body side frame of the water storage tank in the ground, simultaneously with the bottom plate of the water storage tank, a hole is dug in the part that forms the bottom plate pit, similar to the above-mentioned site casting method.
A method of forming a formwork, knitting a reinforcing bar, and adding concrete to this to form a bottom plate pit was adopted.
この方法は、狭く、且つ低い場所での面倒な作業である
ために、作業の困難性と疲労、及び多くの時間を必要と
する欠点があった。This method has the drawbacks of difficulty and fatigue of work and a lot of time, since it is a laborious work in a narrow and low place.
これを解決するために、特公昭63−12975号公報記載の
貯水槽の底板ピット構築方法が提案されている。In order to solve this, a method for constructing a bottom plate pit for a water storage tank is disclosed in Japanese Patent Publication No. 63-12975.
この方法は、貯水槽の本体側枠内の底部に形成されてい
る底板ピット用の穴内に、予め形成されている底板ピッ
トをボルトで吊り下げておき、底板形成後、ボルトで底
板ピットを引き上げて、底板ピットを底板に結合後、ボ
ルトを底板ピットから螺脱するものである。In this method, a preformed bottom plate pit is hung with a bolt in the hole for the bottom plate pit formed in the bottom of the main body of the water tank, and after the bottom plate is formed, the bottom plate pit is pulled up with the bolt. After the bottom plate pit is joined to the bottom plate, the bolt is unscrewed from the bottom plate pit.
この貯水槽の底板ピット構築方法は、底板ピットがボル
トで吊り上げられて底板に結合されるので、少なくとも
底板ピットの底部や、その周囲には空間が残ることにな
る。In this bottom plate pit construction method for a water tank, since the bottom plate pit is lifted up by bolts and joined to the bottom plate, a space remains at least at the bottom of the bottom plate pit and its surroundings.
この空間が、多くの時間の経過、地盤の軟弱化、地震等
によって、底板ピットは勿論、貯水槽全体の設置強度を
低下させ、貯水槽に亀裂を生じさせたり、洩水したりす
る原因となり、早期に修理を必要としたり、寿命を縮め
たりする等の欠点を生じるものである。Due to the passage of a lot of time, weakening of the ground, earthquakes, etc., this space reduces the installation strength of not only the bottom plate pit but also the entire water tank, causing cracks in the water tank and water leakage. However, there are drawbacks such as requiring early repair and shortening the life.
本発明は、従来の貯水槽のピット構築方法における前述
の問題点を解消し、底板ピットの周囲に空間が生じるこ
とがなく、底板ピットの安定した設置が行えて、洩水や
亀裂を生ずることがなく、且つ予め形成した底板ピット
を底板に取付けることによって工期の短縮、作業の容易
な貯水槽の底板ピットの構築方法を提供することを目的
とする。The present invention solves the above-mentioned problems in the conventional method for constructing a pit of a water tank, does not create a space around the bottom plate pit, allows stable installation of the bottom plate pit, and causes water leakage and cracks. It is an object of the present invention to provide a method for constructing a bottom plate pit of a water storage tank, which is free from the above and has a preformed bottom plate pit attached to the bottom plate to shorten the construction period and facilitate the work.
本発明は、前述の目的を達成するための貯水槽の底板ピ
ットの構築方法に関し、地中に埋設された貯水槽の本体
側枠内において、その底部の底板ピットの形成位置に、
底板ピットよりも大きな穴を掘削し、この穴内に底板ピ
ットの外寸法と略同寸の型枠を設置し、その周囲を土砂
で埋戻すと共に、この土砂内に凝結材を注入してこれを
凝結させて型枠を引き抜き、本体側枠の底部に底板ピッ
ト挿入孔を有する底板を形成し、該底板の底板ピット挿
入孔に予め形成されている底板ピットを挿入、底板に固
定することを要旨とするものである。The present invention relates to a method for constructing a bottom plate pit of a water tank for achieving the above-mentioned object, in the main body side frame of the water tank buried in the ground, at the formation position of the bottom plate pit of the bottom,
A hole larger than the bottom plate pit is excavated, a formwork of approximately the same size as the outer size of the bottom plate pit is installed in this hole, and the surrounding area is backfilled with earth and sand, and a coagulant is injected into this earth and sand. The idea is to coagulate and pull out the formwork, form a bottom plate having a bottom plate pit insertion hole in the bottom of the main body side frame, insert a preformed bottom plate pit in the bottom plate pit insertion hole of the bottom plate, and fix it to the bottom plate. It is what
次に、本発明の実施の一例を、図面に就いて以下に説明
する。Next, an example of implementation of the present invention will be described below with reference to the drawings.
第１図，第２図は地中に埋設された貯水槽の完成状態を
示すもので、1a,1b,1c,1dは水平方向に分割されて形成
された本体側枠である。1 and 2 show the completed state of the water tank buried in the ground, and 1a, 1b, 1c, 1d are main body side frames formed by being divided horizontally.
この本体側枠1a,1b,1c,1dは、潜函工法によって地中に
潜埋されるものであるが、地中の所定深さの底地盤に到
達した状態を第３図に示す。The main body side frames 1a, 1b, 1c, 1d, which are buried in the ground by the submersible method, reach a bottom ground of a predetermined depth in the ground and are shown in FIG.
この定地盤を更に掘削して、第１図に示すように、割栗
石２、均し荒砂３を施工するものであるが、この時、底
板ピット４が設けられる部分は、第４図に示すように、
窪状としておく。This ground is further excavated and, as shown in FIG. 1, a split stone 2 and leveled rough sand 3 are constructed. At this time, the portion where the bottom plate pit 4 is provided is shown in FIG. like,
Make it concave.
この窪状の大きさは、底板ピット４よりも大きなもので
なければならない。The size of this recess must be larger than the bottom plate pit 4.
そして、この窪状には、第５図に示す底板ピット４の外
形と同形の仮枠が第６図のように置かれる。Then, a temporary frame having the same shape as the outer shape of the bottom plate pit 4 shown in FIG. 5 is placed in this hollow shape as shown in FIG.
第５図の仮枠５は、吊りフック5aが対向上面に取付けら
れ、これを吊り下げて、前述のように窪状内に置かれ、
その外周を第６図のように土砂６で埋め戻される。In the temporary frame 5 of FIG. 5, the hanging hooks 5a are attached to the opposing upper surfaces, the hanging hooks 5a are hung, and the hanging hooks 5a are placed in the concave shape as described above.
The outer periphery is backfilled with earth and sand 6 as shown in FIG.
この埋め戻しの外圧によって、仮枠５が変形しないよう
に、補強の支梁5bが仮枠５の内部に設けられている。A reinforcing support beam 5b is provided inside the temporary frame 5 so that the temporary frame 5 is not deformed by the external pressure for backfilling.
前記の埋め戻された個所には、第７図に示すように、土
砂を凝固させる凝固材がセメント急結材等の注入材を用
いて圧注入される。As shown in FIG. 7, a solidifying material for solidifying earth and sand is pressure-injected into the above-mentioned backfilled portion using an injecting material such as a cement quick-setting material.
この凝結材としては、セメントペースト、ウレタン樹脂
を主成分とするポリグラウト等が使用されるが、これ等
の凝固材は仮枠５の外周を急速に凝固させることができ
る。Cement paste, polygrout containing urethane resin as a main component, or the like is used as the coagulant, and these coagulants can rapidly solidify the outer periphery of the temporary frame 5.
この凝固材によって、土砂６が凝固した後、直ちに仮枠
５を、その吊りフック5aによって引き上げるものである
が、前記のように仮枠５の外形は、底板ピット４の外形
と同じであるため、仮枠５を除去した後には底板ピット
４と同形の空間が形成される。After the earth and sand 6 are solidified by this solidified material, the temporary frame 5 is immediately pulled up by the hanging hook 5a. However, as described above, the external shape of the temporary frame 5 is the same as the external shape of the bottom plate pit 4. After removing the temporary frame 5, a space having the same shape as the bottom plate pit 4 is formed.
そして、予めPC工法で形成されている底板７が本体側枠
1aに降ろされ、底板７と本体側枠1aとは、第８図のよう
に、ボルト8,アングル９等によって固定され、底板７と
本体側枠1aとの間には、無収縮モルタル10が充填され、
その間の隙間が閉塞される。Then, the bottom plate 7 formed in advance by the PC method is the main body side frame.
1a, the bottom plate 7 and the main body side frame 1a are fixed by bolts 8 and angles 9 as shown in FIG. 8, and a non-shrink mortar 10 is provided between the bottom plate 7 and the main body side frame 1a. Filled,
The gap between them is closed.
この底板７の設置に際し、仮枠５を除去した後の空間
と、底板７の底板ピット孔7aとは一致していなければな
らない。When installing the bottom plate 7, the space after removing the temporary frame 5 and the bottom plate pit hole 7a of the bottom plate 7 must match.
次に、予め、鉄板で形成されている底板ピット４を底板
ピット孔7a内に際し、第８図のようにボルト11でこれを
固定する。Next, the bottom plate pit 4 formed of an iron plate is previously set in the bottom plate pit hole 7a, and this is fixed by the bolt 11 as shown in FIG.
最後に水槽蓋12、吸着管13を取付けて、貯水槽の工事が
完了するもので、このようにして作られた貯水槽は、底
板７の底部、底板ピット４の周囲や底部に空隙のない、
有ったとしても貯水槽の強度に影響を与えない程度の極
く少量の貯水槽が得られる。Finally, the water tank lid 12 and the adsorption tube 13 are attached, and the construction of the water tank is completed. The water tank made in this way has no voids around the bottom of the bottom plate 7, the bottom plate pit 4, or the bottom. ,
Even if there is, a very small amount of water storage tank can be obtained that does not affect the strength of the water storage tank.
又、現場の地下水が高く、水没している場合には、水硬
性の凝固材（グラウト）を用いて、周辺土砂の硬化を図
る必要がある。In addition, when the groundwater at the site is high and submerged, it is necessary to harden the surrounding sediment by using a hydraulic solidifying material (grout).
更に、必要に応じて、底板ピット４の底面には、第９図
のように、プラグ14で密閉できるネジ付ソケット15を取
付けておき、底板ピット４の取付作業中はプラグ14を外
しておき、地下水をこれから逃して底板ピット４を据付
後、プラグ14で閉塞するようにしてもよい。Further, if necessary, a socket 15 with a screw that can be sealed with a plug 14 is attached to the bottom surface of the bottom plate pit 4 as shown in FIG. 9, and the plug 14 is removed during the work of attaching the bottom plate pit 4. The ground water may be released from this, and the bottom plate pit 4 may be installed and then closed with the plug 14.
前記実施例においては、底板７を予めPC工法で形成され
たものとしたが、これは現場で鉄筋やコンクリートで現
場施工してもよく、底板ピットとしては、PC工法で作ら
れたコンクリート製のものを用いてもよい。In the above-mentioned embodiment, the bottom plate 7 was formed in advance by the PC method, but this may be constructed on-site by reinforcing bar or concrete, and the bottom plate pit is made of concrete made by the PC method. You may use the thing.
本発明の構築方法によれば、貯水槽本体内の狭い空間で
の型枠、鉄筋の組立、コンクリートの流し込み、型枠の
除去等の困難な作業を行うことなく、予め形成されてい
る底板ピットを貯水槽の底板に取付けることができる。According to the construction method of the present invention, a bottom plate pit formed in advance can be used without performing difficult work such as formwork, rebar assembly, concrete pouring, and formwork removal in a narrow space within the water tank body. Can be attached to the bottom plate of the water tank.
従って、作業の容易化、工期の短縮を図ることができる
ばかりでなく、底板ピットの周囲、底部の土砂は凝固材
で固められ、且つ底板ピットとの間に大きな空間がな
い。Therefore, not only the work can be facilitated and the construction period can be shortened, but also the earth and sand around and around the bottom plate pit are hardened by the solidified material and there is no large space between the bottom plate pit and the bottom plate pit.
そのため、貯水槽やこれに貯められた水の重量等によっ
て、底板ピット、貯水槽の底板、及びその接合部に亀裂
が入って洩水したり、或いは破損することがなく、長期
にわたって修理することなく使用できる貯水槽が得られ
るものである。Therefore, due to the weight of the water tank or the water stored in it, the bottom plate pit, the bottom plate of the water tank, and their joints will not crack and leak, or be damaged for a long period of time. The result is a water tank that can be used without use.
第１図，第２図は本発明により施工された貯水槽の２方
向の断面図 第３図，第４図，第６図，第７図は施工工程の断面図 第５図は仮枠の斜面図 第８図は第１図の要部の拡大図 第９図はプラグは底板ビットの断面図である。 1a,1b,1c,1d……本体側枠、４……底板ピット、５……
仮枠、６……土砂、７……底板、7a……底板ピット孔。1 and 2 are cross-sectional views of the water storage tank constructed in accordance with the present invention in two directions. FIG. 3, FIG. 4, FIG. 6 and FIG. 7 are cross-sectional views of the construction process. FIG. Slope view FIG. 8 is an enlarged view of a main part of FIG. 1. FIG. 9 is a sectional view of a bottom plate bit of a plug. 1a, 1b, 1c, 1d …… Main body side frame, 4 …… Bottom plate pit, 5 ……
Temporary frame, 6 ... earth and sand, 7 ... bottom plate, 7a ... bottom plate pit hole.
Claims (1)
いて、その底部の底板ピットの形成位置に底板ピットよ
りも大きな穴を掘削し、この穴内に底板ピットの外寸法
と略同寸の仮枠を設置し、その周囲を土砂で埋戻すと共
に、この土砂内に凝固材を注入してこれを凝固させて型
枠を引き抜き、本体側枠内を予めPC工法で形成され且つ
仮枠を引き抜いた後の空間に一致する底板ピット孔を有
する底板を降下させて固定し、該底板の底板ピット孔に
予め形成されている底板ピットを挿入させて底板に固定
することを特徴とする貯水槽の底板ピットの構築方法。1. A hole larger than the bottom plate pit is excavated at a position where the bottom plate pit is formed at the bottom of the main body side frame of the water tank buried in the ground, and the outer dimension of the bottom plate pit is substantially the same as that of the bottom plate pit. A temporary frame is installed, and the surrounding area is backfilled with earth and sand, and a solidifying material is injected into this earth and solidified to pull out the formwork. It is characterized in that a bottom plate having a bottom plate pit hole corresponding to the space after pulling out the frame is lowered and fixed, and a bottom plate pit previously formed in the bottom plate pit hole of the bottom plate is inserted and fixed to the bottom plate. How to construct the bottom plate pit of the water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1185715A JPH0794740B2 (en) | 1989-07-18 | 1989-07-18 | How to construct the bottom pit of the water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1185715A JPH0794740B2 (en) | 1989-07-18 | 1989-07-18 | How to construct the bottom pit of the water tank |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8258307A Division JP2796591B2 (en) | 1996-09-30 | 1996-09-30 | Water tank bottom plate mounting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351435A JPH0351435A (en) | 1991-03-05 |
| JPH0794740B2 true JPH0794740B2 (en) | 1995-10-11 |
Family
ID=16175585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1185715A Expired - Fee Related JPH0794740B2 (en) | 1989-07-18 | 1989-07-18 | How to construct the bottom pit of the water tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0794740B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5240613B2 (en) * | 2009-05-08 | 2013-07-17 | 興建産業株式会社 | Construction method of underground foundation for fire prevention water tank |
| JP6669615B2 (en) * | 2016-09-01 | 2020-03-18 | 鹿島建設株式会社 | Low temperature liquefied gas underground tank |
-
1989
- 1989-07-18 JP JP1185715A patent/JPH0794740B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351435A (en) | 1991-03-05 |
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