JPS5915120A - Construction of underground continuous wall - Google Patents

Construction of underground continuous wall

Info

Publication number
JPS5915120A
JPS5915120A JP12252282A JP12252282A JPS5915120A JP S5915120 A JPS5915120 A JP S5915120A JP 12252282 A JP12252282 A JP 12252282A JP 12252282 A JP12252282 A JP 12252282A JP S5915120 A JPS5915120 A JP S5915120A
Authority
JP
Japan
Prior art keywords
rod
slime
locking box
concrete
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.)
Granted
Application number
JP12252282A
Other languages
Japanese (ja)
Other versions
JPS6248012B2 (en
Inventor
Kenji Kawasaki
健次 川崎
Tetsuo Koyasu
子安 哲雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konoike Construction Co Ltd
Original Assignee
Konoike Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Konoike Construction Co Ltd filed Critical Konoike Construction Co Ltd
Priority to JP12252282A priority Critical patent/JPS5915120A/en
Publication of JPS5915120A publication Critical patent/JPS5915120A/en
Publication of JPS6248012B2 publication Critical patent/JPS6248012B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18Bulkheads or similar walls made solely of concrete in situ

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

PURPOSE:To prevent the lowering of strenth or the leak of water in the joints of underground continuous wall by a methd in which a high-pressure water jetting rod is inserted into a locking box fitted with the end face of a preceding element and water jet is jetted from the rod to remove slime. CONSTITUTION:An underwater concrete is placed in a preceding element 1, a locking box 9 is inserted into the concrete, and a high-pressure water jetting rod is inserted into an annular metal 11. While jetting high-pressure water in the horizontal direction from the tip of the rod, the rod is turned to clean up slime adhered to bent steel plates 4 and coupling steel bars 5 in the joint portion. The slime so removed is flowed through the notched portion of the lower end of the box 9 into the following excavated trench and then discharged through a tremie tube to the ground's surface. The box 9 and the rod are pulled up, an iron bar cage is inserted, and then underwater concrete is placed.

Description

【発明の詳細な説明】 塊下構造物の構築に際し、掘削時の山留め壁として鉄筋
コンクリートの地下連続壁を施工するケースが多いが、
近年は土地有効利用の目的や経済的な理由から地下連続
壁の壁体を仮設工事用だけではなく、構築物の地下壁体
の一部として利用するケースも増えて来た。
[Detailed Description of the Invention] When constructing sub-mass structures, there are many cases in which reinforced concrete underground continuous walls are constructed as retaining walls during excavation.
In recent years, for the purpose of effective land use and for economic reasons, there has been an increase in the number of cases in which underground continuous walls are used not only for temporary construction but also as part of the underground walls of structures.

地下連続壁の形態にはその一目的や施工条件に応じて数
多くの梱類があるが、止水性が良く、大深度の掘削に適
する方法として最も多く用いられているのは、ベントナ
イト泥水等ヲ安定液として使用することによって掘削時
の溝壁の崩壊を防止′する工法であり、安定液工法と呼
ばれている。この工法による時はベントナイトや高分子
添加物の混合泥水の静水圧によって掘削溝の溝壁が崩れ
落ちることから防止されると共に、掘削土砂は泥水と一
緒に地上に搬出され、濃度調整された泥水は再び掘削溝
に還流すると云ったサイクルが#!シ返されることによ
って非常に効率よく、大深度に及ぶ地下連続壁を掘削す
ることが可能である。
There are many types of packaging for underground continuous walls, depending on the purpose and construction conditions, but the most commonly used method, which has good water-stopping properties and is suitable for deep excavations, is bentonite slurry. This is a construction method that prevents the collapse of trench walls during excavation by using it as a stabilizing fluid, and is called the stabilizing fluid construction method. When this method is used, the walls of the excavated trench are prevented from collapsing due to the hydrostatic pressure of the mud mixed with bentonite and polymer additives, and the excavated soil is carried to the ground together with the muddy water, and the muddy water whose concentration has been adjusted is The cycle where the water flows back into the excavation groove is #! By turning back, it is possible to excavate continuous underground walls to great depths very efficiently.

しかし乍らこの工法ではベントナイト等の粘土泥水を安
定液として用いるために、壁体コンクリートを打設する
に際し、先行、後続の各壁体エレメントの継手部にスラ
イムが挾み込まれるため、地下壁が連続した鋤体として
施工出来なかったり、ジ−インド部から地下水が池水す
る原因となったシして、構造上の大きな弱点t−形戊す
ることが少なくない。
However, since this construction method uses clay slurry such as bentonite as a stabilizing liquid, slime is trapped in the joints of each preceding and succeeding wall element when concrete is poured into the wall, resulting in an increase in the thickness of the underground wall. It is often the case that the T-shape is a major structural weakness because it cannot be constructed as a continuous plow body, or it causes groundwater to pool from the Indian part.

不発明はこれらの欠点を改良した地下連続壁の施工方法
に関するものであり、以下実施例1こもとづいて詳述す
る。
The invention relates to a construction method for an underground continuous wall that improves these drawbacks, and will be described in detail below with reference to Example 1.

第1図は、地下連続壁の継手部分ζこおける先行エレメ
ントと後続工にメントの夫々に設置すれた鋼材の配置状
況を示した平面図であり、第2図はその壁体中心線上に
おける断面図である。
Figure 1 is a plan view showing the arrangement of steel materials installed in the preceding element and the subsequent work at the joint part ζ of an underground continuous wall, and Figure 2 is a cross-sectional view on the center line of the wall. It is a diagram.

図において1は先行エレメント、2は後続ニレlシトを
示す、3゛は先行エレメントに挿入すn。
In the figure, 1 indicates the preceding element, 2 indicates the subsequent next page, and 3 indicates n inserted into the preceding element.

た鉄筋籠、4は鉄筋籠の両端部に剛接された折り曲げ鉄
板であり、5は折り曲げ鉄板4に子かしめ取り付けられ
た継手#i棒である。先行エレメントと後続エレメント
間の剪断強度は折り曲げ鉄板4と継手鋼棒5によって確
保される。7は折り曲げ鉄板に取りつけられ、鉄筋籠3
を包み込んだビニールシートで、先行エレメントに打チ
込んだコンクリートはビニールシート7と折り曲げ鉄板
4とによって、後続ニレメン) ff1llの一部掘削
された溝部に流出することを防止する。8は折υ曲は鉄
板4の両端部近くに設けられた鉤形のガイド金物で、第
3図に示すロッキングボックス9f:この鉤形のガイド
金物に嵌合して上下に摺動できる構造となって−る0第
5図の平面図には継手部の折り曲げ鉄板4にロッキング
ボックス9が嵌合された状態が示されている。第4図は
ロッキングボックスの11+711であシ、図の如くロ
ッキングボックスはコの字形の断面を有しており、リプ
鉄板12によって補強され、両端部には折シ曲げ鉄板4
のガイド金物8に嵌合できるジ−インド部10が設けら
れている。またリブ鉄板12に取シ付けられた環状金物
11it、、洗滌用の水ジエツト用のロッドを定位置に
支持するために設けたものである。
4 is a bent iron plate that is rigidly connected to both ends of the reinforcing bar cage, and 5 is a joint #i rod that is attached to the bent iron plate 4 by crimping. The shear strength between the preceding element and the succeeding element is ensured by the bent steel plate 4 and the joint steel rod 5. 7 is attached to a bent iron plate, and the reinforcing bar cage 3
The concrete poured into the preceding element is prevented from flowing into the partially excavated groove of the succeeding element by the vinyl sheet 7 and the bent steel plate 4. 8 is a hook-shaped guide hardware provided near both ends of the iron plate 4, and a locking box 9f shown in FIG. The plan view of FIG. 5 shows the state in which the locking box 9 is fitted into the bent iron plate 4 of the joint portion. Figure 4 shows the locking box 11+711. As shown in the figure, the locking box has a U-shaped cross section, is reinforced with lip iron plates 12, and has bent iron plates 4 at both ends.
A wired portion 10 is provided which can be fitted into a guide metal fitting 8. Further, an annular metal fitting 11it is attached to the rib iron plate 12, and is provided to support a rod for a water jet for cleaning in a fixed position.

また第4図に示す如く、四ツキングボックス9の最下端
には切欠部16が設けてあシ、ロッキングボックス9と
折り曲げ鉄板4とに囲繞され之スペースは瞬接する後続
エレメントの掘削溝とこの切欠部によって連通されてい
る。
Further, as shown in FIG. 4, a notch 16 is provided at the lowermost end of the four-way box 9, and the space surrounded by the locking box 9 and the bent steel plate 4 is used to connect the excavated groove of the subsequent element to be instantaneously connected. They are communicated by a cutout.

第5図(a)は先行エレメントの掘削を終了し、鉄筋籠
3を挿入したのち、トレミー11F14によって水中コ
ンク+1− ) + 5を打設している状況を示した断
面図であり、[blは接手部分の平面図である。
FIG. 5(a) is a cross-sectional view showing the situation in which submerged concrete +1- ) +5 is being cast using tremie 11F14 after finishing the excavation of the preceding element and inserting the reinforcing bar cage 3. is a plan view of the joint portion.

IE 6 IM (alは先行エレメントの水中コンク
リート15を打設したのち、ロッキングボックス9を挿
入]、て、後続エレメントの掘削をしている断面図であ
り、rhlはその状態に對ける継手部分の平面図である
IE 6 IM (Al is a cross-sectional view of the locking box 9 inserted after placing the underwater concrete 15 of the preceding element), te is a cross-sectional view of the subsequent element being excavated, and rhl is a cross-sectional view of the joint part in that state. FIG.

箪7図fg)rhlは後続エレメントの掘削を終rした
のち、高千水哨射ロッド16をロッキングボックスに取
付けた環伏金物11の中にJi人(70ツドの先端から
高田水を水平方向に噴射しなからロッドを回転すること
によって先行エレメントとのジョイン)Mの折曲げ鉄板
4や継手鋼棒5に付着したスライムを洗滌している断面
図と、継手部附近の平面図を示したものである。ロッキ
ングボックスと折曲げ鉄板に囲まれた中で高田水を噴射
すると、この内部の水頭が後続掘削エレメント部の水頭
より上昇するので、洗滌されたスライムは泥水と一緒に
ロッキングボックス下・′1.1Mの切欠き部15をd
つて獲を掘削溝内に押し流され、掘削溝内の一般スライ
ムと一緒にトレミー管145:介し1ポンプ排土やその
他の方法によって地上に排出される。
(Fig. 7 fg) After completing the excavation of the succeeding element, the rhl horizontally sends Takada water from the tip of the Takasui water sentry rod 16 into the surrounding metal fittings 11 attached to the locking box. A cross-sectional view of cleaning the slime attached to the bent iron plate 4 and joint steel rod 5 of joint (joint) M with the preceding element by rotating the rod without injecting it, and a plan view of the vicinity of the joint are shown. It is something. When Takada water is injected inside the rocking box and the bent steel plate, the water head inside rises higher than the water head of the following drilling element, so the washed slime is collected under the rocking box along with the muddy water. 1M notch 15 d
The harvested material is swept into the excavated trench and discharged to the ground together with the general slime in the excavated trench through the tremie pipe 145 by pump soil discharge or other methods.

第Rl’l fAt fblはこのようにしてスライム
を除去したのちに、ロッキングボックスや高田水噴射ロ
ッドを引き抜き、鉄筋篭16を抽入して後続エレメント
の水中コンクリートを打設シている状況を示したもので
ある。
No. Rl'l fAt fbl shows the situation where after removing the slime in this way, the locking box and Takada water injection rod are pulled out, the reinforcing bar cage 16 is inserted, and the underwater concrete of the subsequent element is poured. It is something that

上述の如く不発明による時は、地下連続壁の111[i
 、11 jc 119して、先行エレメントのコンク
リート打設を終了したのち、隣接した後続エレメントの
掘削に先き立ち、先行エレメントの鉄筋篭に溶接され、
先行壁体コンクリートの端部に露出した折り曲げ鉄板に
、つの字形の断面形状を有しているロッキングボックス
を嵌合することによって該折り曲げ鉄板にとりつけられ
た継手調味を後続エレメントを掘削するに際して防護す
ることもできるから、この目的のために一般によく用い
られているロッキングパイプを使用する必要がない。
As mentioned above, in the case of non-invention, 111 [i
, 11 jc 119, after completing the concrete placement of the preceding element, and prior to excavation of the adjacent succeeding element, welded to the reinforcing bar cage of the preceding element,
By fitting a locking box with a box-shaped cross section to the bent steel plate exposed at the end of the preceding wall concrete, the joints attached to the bent steel plate are protected during excavation of the subsequent element. This eliminates the need to use locking pipes, which are commonly used for this purpose.

また不発1]+1は、地下連続壁の施工Iこ際してその
最大の弱点である接手部に付府するスライムを完全に除
去する方法を堤供するものである。
In addition, Explosion 1]+1 provides a method for completely removing slime that accumulates at the joints, which are the greatest weak point, during the construction of underground continuous walls.

すなわち、ロッキングボックスの内側はリブ鉄板によっ
て補強がなされているが、このリブ鉄板には環状の金物
がとりつけられており、ロッキングボックスを先行エレ
メントの壁体に接合したのち、この環状金物に嵌合する
ように高田水噴射用のロッドを挿入し、ロッドの先端部
側面にとりつけられたノズルから水平方向に高圧水ジェ
ットを噴射(7、さらにこのロツドヲ回転させることに
よって、折り曲げ鉄板や継手鋼棒に付着したスライムを
完全に除去するものである。また、ロッキングボックス
を用いることにより、高王水ジェットが直接溝壁に当る
ことがないので、高圧水ジェットの噴射により溝壁が洗
堀されることもない。さらに高汗水の噴射に伴いロッキ
ングボックス内の水頭が上昇するので、ロッキングボッ
クスの下端lff1に設けられ、後続用削溝に連昂する
切欠き部に向って泥水のF降流が起り、高千木ジェット
で洗い取られたスライムはこの泥水流と共に下itmの
り欠き部を舞って後続掘削溝内に搬出される。このよう
にして連続壁のジヨイント部に付着したスライムは完全
に除去され、後続掘削溝内の一般スライムトー緒に、ト
レミー管やスライムパケット等によって地上に排出され
る。
In other words, the inside of the locking box is reinforced with a ribbed iron plate, and a ring-shaped metal fitting is attached to this ribbed iron plate, and after the locking box is joined to the wall of the preceding element, it is fitted into this ring-shaped metal fitting. Insert the Takada water injection rod as shown in the figure below, and spray a high-pressure water jet horizontally from the nozzle attached to the side of the tip of the rod (7). It completely removes adhered slime.Also, by using a rocking box, the high aqua regia jet does not directly hit the groove wall, so the groove wall is washed away by the high pressure water jet. Furthermore, as the water head inside the locking box rises as the high perspiration water is jetted, muddy water F flows down toward the notch provided at the lower end lff1 of the locking box and extending into the subsequent cutting groove. The slime washed away by the Takachigi jet is carried out along with the muddy flow over the notched part of the lower ITM and into the subsequent excavation trench.In this way, the slime attached to the joint part of the continuous wall is completely removed. Then, along with the general slime in the subsequent excavation trench, it is discharged to the ground through a tremie pipe, slime packet, etc.

以上のように従来用いられたロッキングパイプの代りに
、特殊な断面形状を有するロッキングボックスを用い、
先行エレメントの端面に嵌合させる構造となすことによ
り、ロッキングボックス内に高田水噴射用のロッドを挿
入し、水ジェツトでジヨイント部のスライムを完全に除
去することが可能となり、とかく間碩視され勝ちであっ
た安定液工法番こよる地下連続壁のジョイン)Mの浅水
や強度低下を阻止することが出来た。
As mentioned above, instead of the conventionally used locking pipe, a locking box with a special cross-sectional shape is used,
By having a structure that fits into the end face of the leading element, it is possible to insert the Takada water injection rod into the locking box and completely remove slime from the joint part with a water jet, which has been overlooked for a while. The stabilized liquid construction method, which was a winner, was able to prevent shallow water and strength deterioration of the underground continuous wall (Join) M.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は地下連続壁の継手部分を示す平面図、第2図は
両図の壁体中心線上における断面図、第3図はロッキン
グボックスを使用する状態の平面図、第4図はロッキン
グボックスの斜面図、第5図a、bよシ第6図B、b、
第7図a、 b第8図3.bまでは本発明の工程を示す
説明図である。 1・・・先行エレメント 2・・・後続エレメント 3・・・鉄筋篭(先行エレメント) 4・・・折り曲げ鉄板 5・・・継手鋼棒 6・・・鉄筋Va<後続エレメント) 7・・・ビニールシート 8・・・鉤形のガイド金物 ?・・・ロッキングボックス 10・・・ジ、インド部 11・・・環状金物 12・・・リプ鉄板 16・・・切欠き部 14・・・トレミーt^し 15・・・水中コンクリート 16・・・噴射ロツド 第を図 ((Lン 「 (にシ)
Figure 1 is a plan view showing the joint part of the underground continuous wall, Figure 2 is a sectional view taken along the center line of the wall in both figures, Figure 3 is a plan view of the state in which the locking box is used, and Figure 4 is the rocking box. Slope view of Figure 5 a, b, Figure 6 B, b,
Figure 7 a, b Figure 8 3. The figures up to b are explanatory diagrams showing the steps of the present invention. 1... Leading element 2... Following element 3... Rebar basket (preceding element) 4... Bending steel plate 5... Joint steel bar 6... Reinforcing bar Va<following element) 7... Vinyl Sheet 8...Hook-shaped guide hardware? ... Locking box 10 ... Ji, India part 11 ... Annular hardware 12 ... Lip iron plate 16 ... Notch part 14 ... Tremy t^shi 15 ... Underwater concrete 16 ... Figure the injection rod number ((Ln)

Claims (1)

【特許請求の範囲】 掘削時における溝壁の崩壊を防止するためにベントナイ
ト泥水等を安定液として用いる地下連続壁工法において
、先行掘削エレメントのコンタリート用鉄筋惰の両端部
番こ仕切用の折り曲ケ鉄板を剛接し、先行エレメントの
コンクリート打設後にそれに接続する後続エレメントを
掘削するに先立ち、該折り曲げ鉄板に予かじめ設置され
たガイド金物に、コの字形に一面を開放したロッキング
ボックスの両端を嵌合して摺動降下させ、ロッキングボ
ックスによって折り曲げ鉄板に接合された継手鋼棒を防
護したのち、後続エレメント部を掘削し、掘削終了抜上
ロッキングボックスの内側に設けた案内環の中に高圧水
噴射用ロッドを挿入し、ロッドを挿入あるいは引き七げ
ながらロッド・瑞に設けたノズルから水平方向に水ジェ
ツトを噴射し、更【ここのロッドを回転させることによ
って、折り曲げ鉄板や継手喝棒に付着したスライムを洗
い落し、ロッキングボックスの下端部の切欠きから後続
掘削溝の中にスライムを泥水と共に流動させ、後続掘削
溝内の一部スライムと一緒に除失したのチ、 III射
水用ロッドと四ツキングボックスをり【中コンクリート
を打設することによって、水密性の良い連続したコンク
リート壁体を地下に構築する地下連続壁の施工方法。
[Scope of Claims] In an underground continuous wall construction method that uses bentonite slurry or the like as a stabilizing liquid to prevent collapse of trench walls during excavation, bending of both ends of reinforcing bars for contouring of a preceding excavation element for partitioning. After the steel plate is rigidly connected and the subsequent element to be connected to it is excavated after the preceding element is poured with concrete, both ends of a locking box with one side open in a U-shape are attached to the guide hardware that has been installed in advance on the bent steel plate. After the joint steel rod is fitted and slid down and the locking box protects the joint steel rod joined to the bent steel plate, the subsequent element is excavated, and after the excavation is finished, it is pulled out and placed inside the guide ring provided inside the locking box. Insert the high-pressure water jet rod, and while inserting or pulling the rod, spray water jet horizontally from the nozzle provided on the rod/rui. The slime adhering to the rod was washed off, and the slime was flowed together with muddy water from the notch at the lower end of the locking box into the subsequent excavation groove, and some of the slime in the subsequent excavation groove was removed together with the slime. A construction method for underground continuous walls that builds a continuous concrete wall with good watertightness underground by pouring medium concrete using rods and four-way boxes.
JP12252282A 1982-07-13 1982-07-13 Construction of underground continuous wall Granted JPS5915120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12252282A JPS5915120A (en) 1982-07-13 1982-07-13 Construction of underground continuous wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12252282A JPS5915120A (en) 1982-07-13 1982-07-13 Construction of underground continuous wall

Publications (2)

Publication Number Publication Date
JPS5915120A true JPS5915120A (en) 1984-01-26
JPS6248012B2 JPS6248012B2 (en) 1987-10-12

Family

ID=14837928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12252282A Granted JPS5915120A (en) 1982-07-13 1982-07-13 Construction of underground continuous wall

Country Status (1)

Country Link
JP (1) JPS5915120A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108252296A (en) * 2018-01-19 2018-07-06 中铁上海工程局集团有限公司 A kind of method of diaphram wall pipeline in-situ conservation construction
JP2020125661A (en) * 2019-02-06 2020-08-20 清水建設株式会社 Joint structure of underground continuous wall, and construction method of underground continuous wall

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5534249A (en) * 1978-09-01 1980-03-10 Toppan Printing Co Ltd Manufacturing of pressure-sensitive adhesive tape film
JPS5738839A (en) * 1980-08-20 1982-03-03 Asahi Chem Ind Co Ltd Powdered polyethylene composition

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5534249A (en) * 1978-09-01 1980-03-10 Toppan Printing Co Ltd Manufacturing of pressure-sensitive adhesive tape film
JPS5738839A (en) * 1980-08-20 1982-03-03 Asahi Chem Ind Co Ltd Powdered polyethylene composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108252296A (en) * 2018-01-19 2018-07-06 中铁上海工程局集团有限公司 A kind of method of diaphram wall pipeline in-situ conservation construction
JP2020125661A (en) * 2019-02-06 2020-08-20 清水建設株式会社 Joint structure of underground continuous wall, and construction method of underground continuous wall

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