JP2650539B2 - Construction method of underground diaphragm wall - Google Patents
Construction method of underground diaphragm wallInfo
- Publication number
- JP2650539B2 JP2650539B2 JP32145291A JP32145291A JP2650539B2 JP 2650539 B2 JP2650539 B2 JP 2650539B2 JP 32145291 A JP32145291 A JP 32145291A JP 32145291 A JP32145291 A JP 32145291A JP 2650539 B2 JP2650539 B2 JP 2650539B2
- Authority
- JP
- Japan
- Prior art keywords
- excavator
- partition plate
- concrete
- elements
- excavation
- 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
- Bulkheads Adapted To Foundation Construction (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は地中連続壁の構築工法
に関するもので、より具体的には地中連続壁の構築方向
に所定間隔をおいて先行エレメントを構築し、これらの
隣接する先行エレメント間の土砂を掘削するとともに該
先行エレメントの打継面を切削して後行エレメント用の
掘削孔を形成し、この後行エレメント用の掘削孔にコン
クリートを打設して先行エレメントと連続した後行エレ
メントを形成する工程を繰り返すことによって地中連続
壁を構築する工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an underground continuous wall, and more specifically, to construct a preceding element at a predetermined interval in the direction of construction of an underground continuous wall, While excavating earth and sand between the elements, the joint surface of the preceding element was cut to form a drilling hole for the succeeding element, and concrete was poured into the drilling hole for the succeeding element to connect with the preceding element. The present invention relates to a method for constructing an underground continuous wall by repeating a process of forming a subsequent element.
【０００２】[0002]
【従来の技術】上記のような隣接する先行エレメント間
を掘削する際に、掘削機のズムーズな位置決めと安定的
な掘削を実現させるために、特公平３−５７２４６号公
報に示すように、先行エレメント形成用の掘削孔の打ち
継ぎ方向の切削端面の少なくとも上端部に所定寸法の仕
切板を介在させてコンクリートを打設して先行エレメン
トを形成し、コンクリート硬化後に仕切板を取り除くこ
とによって先行エレメント間に互いの端面間隔の大きい
広間隔部を形成し、この広間隔部を掘削機のガイドとし
て隣接する先行エレメント間を掘削する地中連続壁の構
築工法が公知となっている。2. Description of the Related Art As described in Japanese Patent Publication No. 3-57246, in order to achieve smooth positioning of an excavator and stable excavation when excavating between adjacent adjacent elements as described above, At least at the upper end of the cutting end face in the splicing direction of the excavation hole for forming an element, a concrete plate is interposed with concrete to form a leading element, and after the concrete is hardened, the leading element is removed. 2. Description of the Related Art There is known a method of constructing an underground continuous wall in which a wide interval portion having a large end face interval is formed therebetween, and the wide interval portion is used as a guide for an excavator to excavate between adjacent preceding elements.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この公
知の工法では先行エレメントのコンクリートの硬化後に
仕切板を取り除くようにしているため、先行エレメント
のコンクリート天端が地盤面よりも比較的深い場合と
か、または先行エレメントの壁厚が大きな場合等には人
力で容易に取り除くことは出来ず、縁切り用のジャッキ
及びそのための架台、さらには縁切り後の仕切板を引き
抜くためのクレーン等の装置が必要とされた。更にま
た、仕切板を転用するためにはケレン、グリース塗装等
の手間を必要としていた。However, in this known method, the partition plate is removed after the concrete of the preceding element is hardened, so that the concrete top of the preceding element is relatively deeper than the ground surface, Or, when the wall thickness of the preceding element is large, it cannot be easily removed manually, and a device such as a jack for edging and a gantry therefor, and a crane for pulling out the partition plate after edging are required. Was. Furthermore, in order to divert the partition plate, labor such as coating with kerosene and grease was required.
【０００４】本発明は上記のような問題点に鑑みてなさ
れたもので、その目的は仕切板を取り除くことなく、隣
接する先行エレメント間及び先行エレメントの打継面を
掘削機によって掘削することを可能とし、これによって
上記従来の種々の欠陥を改良した施工効率の良い地中連
続壁の構築工法を提供するにある。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to excavate a connecting surface between adjacent preceding elements and a connecting surface of the preceding elements by an excavator without removing a partition plate. An object of the present invention is to provide a method of constructing an underground continuous wall with improved construction efficiency, which can improve the above-mentioned various defects in the prior art.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
め、本発明では地中連続壁の構築方向に所定間隔をおい
て掘削孔を形成し、該掘削孔内にコンクリートを打設し
て先行エレメントを構築し、これらの隣接する先行エレ
メント間に掘削機を設置して該先行エレメント間の土砂
を掘削するとともに該先行エレメントの打継面を切削し
て後行エレメント用の掘削孔を形成し、該後行エレメン
ト用の掘削孔にコンクリートを打設して該先行エレメン
トと連続した後行エレメントを形成する工程を繰り返す
ことによって地中連続壁を構築する工法において、前記
先行エレメント形成用の掘削孔の打ち継ぎ用上端面に、
掘削機の重量によって容易に破壊可能な素材から形成し
た所定厚さの仕切板を介在させてコンクリートを打設し
て前記先行エレメントを形成し、前記掘削機を該仕切板
が一体的に付設された隣接する先行エレメント間に設置
し、該掘削機の重量によって該仕切板の上部を破壊しな
がら該掘削機によって前記隣接する先行エレメント間の
土砂、該仕切板の下方部及び該先行エレメントの打継面
を掘削して後行エレメント用の掘削孔を形成するように
してなるのである。In order to achieve the above object, in the present invention, excavation holes are formed at predetermined intervals in the construction direction of the underground continuous wall, and concrete is poured into the excavation holes. Constructing the leading element, installing an excavator between these adjacent leading elements to excavate the sand between the leading elements and cutting the joint surface of the leading element to form a drilling hole for the succeeding element In the construction method of constructing an underground continuous wall by repeating a step of casting concrete in the excavation hole for the subsequent element and forming a subsequent element continuous with the preceding element, On the top surface for splicing of the drill hole,
Concrete is cast by interposing a partition plate having a predetermined thickness formed of a material which can be easily broken by the weight of the excavator to form the preceding element, and the excavator is integrally provided with the partition plate. And the excavator breaks the upper part of the partition plate by the weight of the excavator, sediment between the adjacent preceding elements, the lower part of the partition plate and the striking of the preceding element. The joint surface is excavated to form an excavation hole for a succeeding element.
【０００６】[0006]
【作用】掘削機を仕切板が一体的に付設された隣接する
先行エレメント間に設置すると、この掘削機の両端部に
おける重量によって上記仕切板の上部は潰されて破壊
し、この潰された部分に掘削機の両端部が一部沈み込む
ことによって掘削機は位置決めされ、以後は掘削機の掘
削に伴って仕切板の下方部がガイドとなり、前記隣接す
る先行エレメント間の土砂、該仕切板の下方部及び該先
行エレメントの打継面が確実に掘削され、後行エレメン
ト用の掘削孔が形成される。When the excavator is installed between adjacent preceding elements integrally provided with a partition plate, the upper portion of the partition plate is crushed and broken by the weight of both ends of the excavator, and the crushed portion is broken. The excavator is positioned by partially sinking both ends of the excavator into the excavator, and thereafter the lower part of the partition plate becomes a guide as the excavator excavates, and the earth and sand between the adjacent preceding elements, The lower part and the joint surface of the preceding element are reliably excavated, and a drill hole for the succeeding element is formed.
【０００７】[0007]
【実施例】以下に本発明の好適な実施例に付いて添付の
図面を参照にして説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
【０００８】先ず、図１に示すように地中連続壁の構築
方向に沿って所定間隔で先行エレメント用の掘削孔１を
掘削する。次いで、この掘削孔１に鉄筋かご（図示せ
ず）を建込んだ後、コンクリート２を打設するが、この
時、予め掘削孔１の打ち継ぎ方向の掘削壁面の上部に仕
切板３を付設しておく。この仕切板３は先行エレメント
の打継部における切削厚みに相当する厚さを有するボッ
クス状のもので、木製、ベニヤ製、発泡スチロール製、
或いはこれらの混製等のように比較的重量のあるカッタ
ードラム式掘削機の重量によって容易に破壊できる程度
の強度を有する素材から形成される。First, as shown in FIG. 1, excavation holes 1 for preceding elements are excavated at predetermined intervals along the construction direction of the underground continuous wall. Next, after a steel cage (not shown) is erected in the excavation hole 1, concrete 2 is cast. At this time, a partition plate 3 is previously attached to the upper part of the excavation wall in the joining direction of the excavation hole 1. Keep it. The partition plate 3 is a box-shaped member having a thickness corresponding to the cut thickness at the joint portion of the preceding element, and is made of wood, veneer, styrene foam,
Alternatively, it is formed of a material having such a strength that it can be easily broken by the weight of a relatively heavy cutter drum type excavator such as a mixture thereof.
【０００９】上記のように打設されたコンクリート２が
硬化して隣接する先行エレメント４−４が形成されたな
らば、バケット式掘削機などを用いて先行エレメント４
−４間の表面土砂を浅く仮掘りする。次いで、本堀用の
ドラム式掘削機５を先行エレメント４−４間に設置し、
その掘削機５の両側端部が仕切板３の上面に載置される
ようにする。仕切板３は、上記のように掘削機５の重量
によって容易に破壊できる程度の強度を有する素材から
形成され、また先行エレメント４−４間の表面地盤は浅
く仮堀されているため、掘削機を上記のように載置する
と掘削機の両端部が仕切板の上面部を押し潰しながら仮
掘りされた地盤まで沈下させるため、掘削機５は先行エ
レメント４−４間の所定の位置に正しく位置決めされ
る。When the concrete 2 cast as described above hardens and the adjacent preceding element 4-4 is formed, the preceding element 4-4 is formed using a bucket type excavator or the like.
Temporarily dig shallow surface sand between -4. Next, the drum type excavator 5 for the main moat is installed between the preceding elements 4-4,
Both end portions of the excavator 5 are placed on the upper surface of the partition plate 3. As described above, the partition plate 3 is formed from a material having such strength that it can be easily broken by the weight of the excavator 5, and the surface ground between the preceding elements 4-4 is shallow and temporarily dug. When the excavator is placed as described above, the excavator 5 is correctly positioned at a predetermined position between the preceding elements 4-4 because the excavator 5 sinks to the temporarily dug ground while crushing the upper surface of the partition plate. Is done.
【００１０】その後、掘削機５を作動すると、掘削機は
仕切板３及び仕切板３−３間の土砂を掘削する。この
時、仕切板３は掘削機によって容易に切削されるため、
掘削方向のガイドとしての役目を果たす。従って、掘削
機５は仕切板３をガイドとして先行エレメント４−４間
の土砂を掘削し、仕切板３の下端より下方においては先
行エレメントの打継面を仕切板３と同等の厚さだけ切削
して後行エレメント用の掘削孔１ａを形成する。Thereafter, when the excavator 5 is operated, the excavator excavates the earth between the partition plate 3 and the partition plate 3-3. At this time, since the partition plate 3 is easily cut by the excavator,
Serves as a guide in the direction of excavation. Therefore, the excavator 5 excavates the earth and sand between the preceding elements 4-4 using the partition plate 3 as a guide, and cuts a joint surface of the preceding element by a thickness equal to that of the partition plate 3 below the lower end of the partition plate 3. Then, the excavation hole 1a for the following element is formed.
【００１１】この後行エレメント用の掘削孔１ａに鉄筋
かご（図示せず）を設置してコンクリート２ａを打設す
ると先行エレメントと後行エレメントが連結された壁体
が形成される。このような方法を繰り返すことによって
本発明の地中連続壁を構築する。When a steel cage (not shown) is installed in the excavation hole 1a for the following element and concrete 2a is cast, a wall is formed in which the preceding element and the following element are connected. By repeating such a method, the underground continuous wall of the present invention is constructed.
【００１２】[0012]
【発明の効果】上記のように本発明に係る地中連続壁の
構築工法では、先行エレメント形成用の掘削孔の打ち継
ぎ用上端面に、掘削機の重量によって容易に破壊可能な
素材から形成した所定厚さの仕切板を介在させてコンク
リートを打設して先行エレメントを形成し、掘削機を該
仕切板が一体的に付設された隣接する先行エレメント間
に設置し、該掘削機の重量によって該仕切板の上部を破
壊しながら該掘削機によって前記隣接する先行エレメン
ト間の土砂、該仕切板の下方部及び該先行エレメントの
打継面を掘削して後行エレメント用の掘削孔を形成する
ようにしてなるので、従来のように先行エレメントのコ
ンクリートの硬化後に仕切板を取り除くための装置と
か、手間、さらには仕切板を転用するための手間を必要
とせず、地中連続壁の施工効率を向上させることができ
る。As described above, in the method of constructing an underground continuous wall according to the present invention, the excavation hole for forming the preceding element is formed of a material which can be easily broken by the weight of the excavator. The leading element is formed by casting concrete with a partition plate having a predetermined thickness interposed therebetween, and an excavator is installed between adjacent preceding elements to which the partition plate is integrally attached, and the weight of the excavator is set. The excavator excavates the earth and sand between the adjacent preceding elements, the lower part of the dividing plate, and the joint surface of the preceding element while forming the excavation hole for the succeeding element while destroying the upper part of the partition plate. It does not require a device to remove the partition plate after the concrete of the preceding element is hardened as in the past, or the time and labor required to divert the partition plate. It is possible to improve the construction efficiency.
【図１】先行エレメント用の掘削孔を掘削した状態を示
す縦断面図。FIG. 1 is a longitudinal sectional view showing a state in which a drill hole for a preceding element is drilled.
【図２】先行エレメント用の掘削孔に仕切板を配設した
状態を示す縦断面図。FIG. 2 is a longitudinal sectional view showing a state in which a partition plate is arranged in a drilling hole for a preceding element.
【図３】先行エレメント用の掘削孔にコンクリートを打
設した状態を示す縦断面図。FIG. 3 is a longitudinal sectional view showing a state in which concrete is poured into a drilling hole for a preceding element.
【図４】隣接する先行エレメント間を掘削機で掘削する
状態を示す縦断面図。FIG. 4 is a longitudinal sectional view showing a state where an excavator excavates between adjacent preceding elements.
【図５】先行エレメント間に後行エレメントを構築した
状態を示す縦断面図。FIG. 5 is a longitudinal sectional view showing a state where a succeeding element is constructed between preceding elements.
１ 先行エレメント用の掘削孔 ２ コンクリート ３ 仕切板 ４ 先行エレメント ５ 掘削機 DESCRIPTION OF SYMBOLS 1 Drilling hole for preceding element 2 Concrete 3 Divider 4 Leading element 5 Excavator
Claims (1)
掘削孔を形成し、該掘削孔内にコンクリートを打設して
先行エレメントを構築し、これらの隣接する先行エレメ
ント間に掘削機を設置して該先行エレメント間の土砂を
掘削するとともに該先行エレメントの打継面を切削して
後行エレメント用の掘削孔を形成し、該後行エレメント
用の掘削孔にコンクリートを打設して該先行エレメント
と連続した後行エレメントを形成する工程を繰り返すこ
とによって地中連続壁を構築する工法において、前記先
行エレメント形成用の掘削孔の打ち継ぎ用上端面に、掘
削機の重量によって容易に破壊可能な素材から形成した
所定厚さの仕切板を介在させてコンクリートを打設して
前記先行エレメントを形成し、前記掘削機を該仕切板が
一体的に付設された隣接する先行エレメント間に設置
し、該掘削機の重量によって該仕切板の上部を破壊しな
がら該掘削機によって前記隣接する先行エレメント間の
土砂、該仕切板の下方部及び該先行エレメントの打継面
を掘削して後行エレメント用の掘削孔を形成するように
してなることを特徴とする地中連続壁の構築工法。An excavation hole is formed at predetermined intervals in the direction of construction of an underground continuous wall, concrete is poured into the excavation hole to construct a leading element, and excavation is performed between these adjacent preceding elements. A machine is installed to excavate earth and sand between the preceding elements, and cut a joint surface of the preceding element to form a drilling hole for a succeeding element, and cast concrete in the drilling hole for the succeeding element. In the construction method of constructing an underground continuous wall by repeating the step of forming a subsequent element that is continuous with the preceding element, in the upper end surface for splicing of the excavation hole for forming the preceding element, the weight of the excavator The leading element is formed by casting concrete with a partition plate having a predetermined thickness formed from a material that can be easily broken, and the excavator is integrally provided with the partition plate. The excavator disposes the earth and sand between the adjacent preceding elements, the lower portion of the partition plate, and the connection of the preceding elements by installing the excavator between the adjacent preceding elements while destroying an upper portion of the partition plate by the weight of the excavator. A method for constructing an underground continuous wall, wherein a surface is excavated to form an excavation hole for a succeeding element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32145291A JP2650539B2 (en) | 1991-11-11 | 1991-11-11 | Construction method of underground diaphragm wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32145291A JP2650539B2 (en) | 1991-11-11 | 1991-11-11 | Construction method of underground diaphragm wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05132927A JPH05132927A (en) | 1993-05-28 |
| JP2650539B2 true JP2650539B2 (en) | 1997-09-03 |
Family
ID=18132722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32145291A Expired - Lifetime JP2650539B2 (en) | 1991-11-11 | 1991-11-11 | Construction method of underground diaphragm wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2650539B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7248558B2 (en) * | 2019-10-25 | 2023-03-29 | 鹿島建設株式会社 | How to build a diaphragm wall |
| KR102517949B1 (en) * | 2022-05-03 | 2023-04-03 | 김성우 | Buried box structure for staggered lapping and method for construction of slurry wall using the same |
-
1991
- 1991-11-11 JP JP32145291A patent/JP2650539B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05132927A (en) | 1993-05-28 |
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