JPH0351435A - Construction method for bottom plate pit of water reservoir - Google Patents
Construction method for bottom plate pit of water reservoirInfo
- Publication number
- JPH0351435A JPH0351435A JP1185715A JP18571589A JPH0351435A JP H0351435 A JPH0351435 A JP H0351435A JP 1185715 A JP1185715 A JP 1185715A JP 18571589 A JP18571589 A JP 18571589A JP H0351435 A JPH0351435 A JP H0351435A
- Authority
- JP
- Japan
- Prior art keywords
- bottom plate
- pit
- plate pit
- hole
- earth
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 12
- 238000009415 formwork Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000000701 coagulant Substances 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract 3
- 238000009933 burial Methods 0.000 abstract 1
- 230000001112 coagulating effect Effects 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000009434 installation Methods 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
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation 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
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002689 soil 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
Abstract
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] [Field of Industrial Application] The present invention is directed to a water storage tank buried underground, in order to make it possible to suck out all the water stored in the tank. The present invention relates to a construction method for forming a bottom plate pit, which is a recess at the bottom of a water storage tank into which a water suction pipe is inserted.
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 creating a water tank underground, there are two methods: a hole is dug on site, a formwork is installed in the hole, and concrete is poured. There is 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 hidden box construction method in which it is hidden.
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 submerged box construction method, after burying the side frame of the main body of the water tank underground, at the same time as the bottom plate of the water tank, a hole is dug in the part where the bottom plate pit will be formed, as in the above-mentioned cast-in-place method. The method used was to build a formwork, weave reinforcing bars, and then pour concrete into it to create a bottom plate pit.
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 disadvantages in that the work is difficult and tiring, and requires a lot of time because it requires 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 problem, a method for constructing a bottom plate pit for a water storage tank has been proposed, as described in Japanese Patent Publication No. 12975/1983.
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
１−をボルｌ・で１１％り下げておき、底板形戒後、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１・を底板ビノトから螺脱するものである。In this method, a pre-formed bottom plate pit 1- is lowered by 11% with bolts into the hole for the bottom plate pit formed at the bottom of the side frame of the main body of the water tank. After pulling up the bottom plate pit with bolts and connecting the bottom plate pit to the bottom plate, the bolt 1 is screwed off from the bottom plate.
この貯水槽の底板ピント構築方法は、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 method of constructing a bottom plate pit for a water storage tank, the bottom plate pit is lifted up with bolts and connected to the bottom plate, so that a space remains at least at the bottom of the bottom plate pit and around it.
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１・は勿論、貯水槽全体の設置強度
を低下させ、貯水槽に亀裂を生しさせたり、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しるものである。Over time, due to the weakening of the ground, earthquakes, etc., this space can reduce the installation strength of not only the bottom plate but also the entire water tank, causing cracks to form in the water tank and water leakage. This causes shortcomings such as requiring early repair and shortening the service life.
本発明は、従来の貯水槽のビッ１へ構築方法における前
述の問題点を解消し、底板ピントの周囲に空間が生しる
ことがなく、底板ピットの安定した設置が行えて、浅水
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 of constructing the pit of a water storage tank, eliminates the creation of a space around the bottom plate pit, allows stable installation of the bottom plate pit, and prevents shallow water and cracks. To provide a method for constructing a bottom plate pit of a water storage tank, which does not cause the problem, shortens the construction period, and facilitates work by attaching a preformed bottom plate pit to the bottom plate.
本発明は、前述の目的を達威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ン
ト挿入孔を有する底板を形成し、該底板の底板ピント挿
入孔に予め形成されている底板ピットを挿入、底板レこ
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 storage tank in order to achieve the above-mentioned object.
A hole larger than the bottom plate pit is excavated, a formwork with approximately the same external dimensions as the bottom plate pit is installed inside this hole, and the surrounding area is backfilled with earth and sand, and a coagulant is injected into this earth and sand. After condensation, the formwork is pulled out, a bottom plate having a bottom plate pin insertion hole is formed at the bottom of the side frame of the main body, and a pre-formed bottom plate pit is inserted into the bottom plate pin insertion hole of the bottom plate, and the bottom plate is fixed with a rectangle. This is a summary.
［発明の実施例］
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。[Embodiment of the Invention] Next, an example of the 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或状態を
示すもので、ｌａ，ｌｂ．Ｉｃ，Ｌｄは水平方向に分割
されて形成された本体側枠である。Figures 1 and 2 show the complete state of a water tank buried underground, with la, lb. Ic and Ld are main body side frames formed by being divided in the horizontal direction.
この本体側枠１ａ．ｌｂ，ｌｃ，ｌｄ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。This main body side frame 1a. lb, lc, and ld are buried underground using the submerged box construction method, and FIG. 3 shows the state in which they have reached the bottom of the ground at a predetermined depth.
この定地盤を更に掘削して、第ｌ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 level ground is further excavated and cracked stones 2 and leveled rough sand 3 are installed as shown in Figure 1.At this time, the area where the bottom plate pit 4 is installed is shown in Figure 4. like,
Leave it in a hollow shape.
この窪状の大きさは、底板ビソト４よりも大きなもので
なければならない。The size of this depression must be larger than the bottom plate 4.
そして、この窪状には、第５図に示す底板ビント４の外
形と同形の仮枠５が第６図のように置かれる。A temporary frame 5 having the same external shape as the bottom plate bin 4 shown in FIG. 5 is placed in this depression as shown in FIG. 6.
第５図の仮枠５は、吊りフツク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。The temporary frame 5 shown in FIG. 5 has a hanging hook 5a attached to its upper surface, is suspended and placed in a depression as described above, and its outer periphery is backfilled with earth and sand 6 as shown in FIG. It will be done.
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。Reinforcing support beams 5b are provided inside the temporary frame 5 so that the temporary frame 5 is not deformed by the external pressure of this 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ｌ．結材等の注入材を用
いて圧注入される。As shown in FIG. 7, the backfilled area is filled with a coagulating material such as cement l. It is injected under pressure using an injection material such as binder.
この凝固材としては、セメントペースト、ウレタン樹脂
を主戒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。As this coagulating material, cement paste, polygrout containing urethane resin, etc. are used, and these coagulating materials 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
形と同しであるため、仮枠５を除去した後には底板ピノ
ト４と同形の空間が形成される。Immediately after the earth and sand 6 is solidified by this coagulating material, the temporary frame 5 is pulled up by its hanging hook 5a, and as mentioned above, the outer shape of the temporary frame 5 is the same as the outer shape of the bottom plate pit 4. Therefore, after removing the temporary frame 5, a space having the same shape as the bottom plate pinot 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ｌａ内に降ろされ、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１
０が充填され、その間の隙間が閉塞される。Then, the bottom plate 7, which has been formed in advance by the PC construction method, is lowered into the main body side frame la, and the bottom plate 7 and the main body side frame 1a are connected to the eighth
As shown in the figure, it is fixed with bolts 8, angles 9, etc., and non-shrinkage mortar 1 is placed between the bottom plate 7 and the main body side frame 1a.
0 is filled in, and 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 must match the bottom plate pit hole 7a of the bottom plate 7.
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, which is formed of an iron plate, is placed in the bottom plate pit hole 7a in advance and fixed with bolts 11 as shown in FIG.
最後に水槽蓋ｌ２、吸水管１３を取付りて、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、底板ピノト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 water suction pipe 13 are attached to complete the water tank construction. Even if there is, a water tank with a very small amount that does not affect the strength of the water tank can be obtained.
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。Furthermore, if the groundwater level at the site is high and the site is submerged, it is necessary to harden the surrounding earth and sand using a hydraulic coagulant (grout).
更に、必要に応して、底板ピット４の底面には、第９図
のように、プラグｌ４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１
４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。Furthermore, if necessary, a threaded socket 15 that can be sealed with a plug l4 is provided on the bottom surface of the bottom plate pit 4, as shown in FIG.
Install the plug 1 while installing the bottom plate pit 4.
4, and drain the groundwater from the bottom plate pit 4.
After installation, it may be closed with a 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 embodiment, the bottom plate 7 was formed in advance using the PC construction method, but it may also be constructed on site using reinforcing bars or concrete, and the bottom plate pit may be made of concrete made using the PC construction method. You may also use
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, the bottom plate pit is formed in advance without having to perform difficult work such as assembling formwork and reinforcing bars, pouring concrete, and removing formwork in a narrow space inside 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 can the work be facilitated and the construction period shortened, but also the earth and sand around and at the bottom of the bottom plate pit is solidified with a coagulating 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４．
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, depending on the weight of the water tank and the water stored in it, the bottom plate pit, the bottom plate of the water tank, and so on.4. It is possible to obtain a water storage tank that does not cause water leakage or damage due to cracks in the joints between the two, and can be used for a long period of time without repair.
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図はプラグは底板ピットの断面図である。
ｌａ，ｌｂ，ｌｃ，ｌｄ−一本体側枠、４−・一底板ピ
ット、５一仮枠、６一土砂、７一底板、７ａ底板ピット
孔。Figures 1 and 2 are cross-sectional views in two directions of a water tank constructed according to the present invention. Figures 3, 4, 6, and 7 are cross-sectional views of the construction process. Figure 5 is a cross-sectional view of the temporary frame. FIG. 8 is an enlarged view of the main part of FIG. 1. FIG. 9 is a sectional view of the bottom plate pit of the plug. la, lb, lc, ld - 1 main body side frame, 4 - 1 bottom plate pit, 5 1 temporary frame, 6 1 soil, 7 1 bottom plate, 7a bottom plate pit hole.
Claims (1)
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特徴とする
貯水槽の底板ピットの構築方法。Inside the side frame of the main body of the water storage tank buried underground, a hole larger than the bottom plate pit is excavated at the location where the bottom plate pit will be formed at the bottom, and a formwork with approximately the same external dimensions as the bottom plate pit is inserted into this hole. is installed, the surrounding area is backfilled with earth and sand, and a setting material is injected into this earth and sand to set it, and the formwork is pulled out to form a bottom plate having a bottom plate pit insertion hole at the bottom of the main body side frame, A method for constructing a bottom plate pit for a water storage tank, comprising inserting a pre-formed bottom plate pit into a bottom plate pit insertion hole of the bottom plate and fixing it to the bottom plate.
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 true JPH0351435A (en) | 1991-03-05 |
| JPH0794740B2 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261229A (en) * | 2009-05-08 | 2010-11-18 | Koken Sangyo Kk | Construction method of fireproof water tank underground laying foundation |
| JP2018035902A (en) * | 2016-09-01 | 2018-03-08 | 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
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261229A (en) * | 2009-05-08 | 2010-11-18 | Koken Sangyo Kk | Construction method of fireproof water tank underground laying foundation |
| JP2018035902A (en) * | 2016-09-01 | 2018-03-08 | 鹿島建設株式会社 | Low temperature liquefied gas underground tank |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0794740B2 (en) | 1995-10-11 |
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