JPS60203738A - Pile head reinforcing method - Google Patents

Pile head reinforcing method

Info

Publication number
JPS60203738A
JPS60203738A JP20230084A JP20230084A JPS60203738A JP S60203738 A JPS60203738 A JP S60203738A JP 20230084 A JP20230084 A JP 20230084A JP 20230084 A JP20230084 A JP 20230084A JP S60203738 A JPS60203738 A JP S60203738A
Authority
JP
Japan
Prior art keywords
pile
casing
concrete
footing
hollow
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
JP20230084A
Other languages
Japanese (ja)
Other versions
JPH0141773B2 (en
Inventor
Hideyoshi Takahashi
高橋 秀吉
Takashi Ueki
植木 隆司
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.)
TOMOEGUMI IRON WORKS Ltd
Original Assignee
TOMOEGUMI IRON WORKS 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 TOMOEGUMI IRON WORKS Ltd filed Critical TOMOEGUMI IRON WORKS Ltd
Priority to JP20230084A priority Critical patent/JPS60203738A/en
Publication of JPS60203738A publication Critical patent/JPS60203738A/en
Publication of JPH0141773B2 publication Critical patent/JPH0141773B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations

Abstract

PURPOSE:To increase a resistance force against a horizontal force, by a method wherein a cylindrical casing is erected outwardly of the outer peripheral part of the head part of a hollow pile having a top part which is open, and concrete is poured in the hollow part of the pile head and also in a footing part. CONSTITUTION:After a hollow pile 1 with a top part which is open, and a cylindrical casing 4 with a partial bottom 3 is erected, as it is guided by the pile 1, outwardly of the outer peripheral part of a pile head part in a manner that a gap between the forward end thereof and the pile 1 is closed. By hanging down a blocking material 7 from a mounting rod 15 by means of chains 16, the blocking material is disposed in the pile 1 in a level lower than that of the casing 3. Reinforcing bars 14 for underground beam, extending through the casing 4, are arranged, and a plate 8 having a through-hole formed at the center, is placed to the top part of the pile 1. Concrete 9 is then poured in the pile 1 and the casing 4. After a base plate 11 of a steel frame 10 is superposed with the plate 8 to couple them together by means of bolt and nuts, concrete is poured in the underground beam part and a footing part 12 to form them integrally.

Description

【発明の詳細な説明】 この発明は杭頭P1u強方法に関し、その目的は水平力
に十分耐えるように杭頭部の所要長さを補強し、しかも
、杭頭をフーチング内に確実に固定し、フーチングコン
クリートの打設とともに杭中空部、ケーシング内にもコ
ンクリートを打設して施工能率を向上することにある。
[Detailed Description of the Invention] This invention relates to a method for reinforcing the pile head P1u, and its purpose is to reinforce the required length of the pile head so as to sufficiently withstand horizontal forces, and to securely fix the pile head within the footing. The aim is to improve construction efficiency by pouring concrete into the hollow part of the pile and the casing as well as pouring the footing concrete.

従来一般には杭頭をフーチングに定着するためにアンカ
ー鉄筋を設けるが、引抜力、水平力によって生ずる杭頭
部の曲げモーメントを考慮すると不十分な場合があシ、
さらにプレストレストコンクリート杭の上部をカットオ
フするとプレストレスが落ちるのでより問題となる。
Conventionally, anchor reinforcing bars are generally provided to anchor the pile head to the footing, but this is sometimes insufficient when considering the bending moment of the pile head caused by pulling force and horizontal force.
Furthermore, cutting off the upper part of a prestressed concrete pile causes the prestress to drop, which becomes more of a problem.

そこで杭頭部の外周にケーシングを予め、あるいは後か
ら嵌めて杭頭部を補強する構造のものが開発されており
、例えば実公昭56−34045号公報、特公昭48−
14.086号公報に示される方法がある。
Therefore, structures have been developed in which a casing is fitted around the outer circumference of the pile head in advance or afterward to reinforce the pile head.
There is a method shown in Publication No. 14.086.

ところで前者の公報に示される場合杭頭部とケーシング
との間に先に充填材を充填しておくので施工手間が増す
。また後者の公報に示される場合はケーシングを先に打
込むのでケーシング内に土砂が入ってケーシングを損傷
する恐れがあり、また杭打の際ケーシングが移動する恐
れがある。さらにケーシング内部の土砂の排出が困難で
ある。
However, in the case shown in the former publication, the filling material is first filled between the pile head and the casing, which increases the construction work. Further, in the case shown in the latter publication, the casing is driven in first, so there is a risk that earth and sand may enter the casing and damage the casing, and there is also a risk that the casing may move during pile driving. Furthermore, it is difficult to discharge the earth and sand inside the casing.

この発明は前記従来の問題点を解消すべく開発したもの
で以下その詳細を図示した実施例によって説明する。
The present invention was developed to solve the above-mentioned conventional problems, and details thereof will be explained below with reference to illustrated embodiments.

先ず頂部が開口した中空の杭1を所望の位置に打込み等
によって建込む。次いでその杭1を案内にして水平力の
影響の大きい杭頭部外周部に先端部を杭との間隙を塞ぐ
ように一部底3を設けた筒形ケーシング4を打込み等に
よって建込む。なおケーシングの長さは杭径の3倍以上
で8倍以下であるととが車重しい。またその際杭1の周
りに建込みを容易とする掘削孔2を設ける場合がある。
First, a hollow pile 1 with an open top is erected at a desired position by driving or the like. Next, using the pile 1 as a guide, a cylindrical casing 4 having a partial bottom 3 is erected on the outer periphery of the pile head, where the influence of horizontal force is large, by driving or the like so that the tip part closes the gap between the pile and the pile. If the length of the casing is 3 times or more and 8 times or less the pile diameter, the vehicle will be heavy. Further, in this case, an excavated hole 2 may be provided around the pile 1 to facilitate construction.

さらに補強効果を増大させるだめにケーシング4の外周
にガセットプレート5を取材は地中梁の補強材6を数句
ける。また杭内には塞7を配置、杭頂にはプレート8を
設け、先ず杭1内およびケーシング4内にコンクリート
9を打設し、次いで鉄骨柱10のベースプレート11を
前記プレート8に重ねてボルト・ナツトで結合し、次い
でフーチング部12のコンクリートを打設する。第4図
Furthermore, in order to increase the reinforcing effect, a gusset plate 5 is installed around the outer periphery of the casing 4, and several reinforcing members 6 for underground beams are installed. In addition, a plug 7 is placed inside the pile, and a plate 8 is installed at the top of the pile. First, concrete 9 is poured inside the pile 1 and the casing 4, and then the base plate 11 of the steel column 10 is placed on top of the plate 8, and bolts are placed on top of the pile.・Join with nuts and then pour concrete for the footing portion 12. Figure 4.

第5図はフーチング部の他の実施例を示したもので、第
4図はケーシング4をフーチング部12の頂部まで立上
げた例であり第5図はガセットプレート5から鉄筋13
を立上げ、何れも鉄骨柱10のベースプレート11はフ
ーチング部12上に設置するようにした事例である。第
6図、・第7図は地中梁がR,C構造の場合で地中梁の
鉄筋14をケーシング4を貫通して配置しである。また
塞7はケーシング4上部に挿通した数句棒15から鎖1
6によって懸垂しである。そして取付棒15の挿入孔を
複数段設けて塞の高さ調節ができる。第8図、第9図は
地中梁がSRC構造の場合でケーシング4に溶接して突
設したガセットプレート5にラチス梁の上下弦月となる
アングルイ」17を取付けである。
FIG. 5 shows another embodiment of the footing part. FIG. 4 shows an example in which the casing 4 is raised to the top of the footing part 12, and FIG.
In both cases, the base plate 11 of the steel column 10 is installed on the footing part 12. 6 and 7 show the case where the underground beam has an R or C structure, and the reinforcing bars 14 of the underground beam are arranged to penetrate the casing 4. In addition, the block 7 is connected to the chain 1 from the rod 15 inserted into the upper part of the casing 4.
6 is a pull-up. By providing a plurality of insertion holes for the mounting rod 15, the height of the plug can be adjusted. Figures 8 and 9 show that when the underground beam is of SRC structure, angle lugs 17, which form the upper and lower crescents of the lattice beam, are attached to the gusset plate 5, which is welded and protrudes from the casing 4.

この発明は以上の構成からなり、頂部が開口した中空杭
の水平力の影響の大きい杭頭部外周部に筒形ケーシング
を建込み、杭頭部外周部およびケーシング内にフーチン
グ部とともにコンクリートを打設して一体とするので施
工が一工程ですみ、 ゛かつ配力の向上が著しい。また
杭内にはケーシング下端より深くコンクリ−1・が打設
されるので断面の急激な変化がなく、水平力に対する抵
抗も合理的である。しかも杭を建込んでから杭を案内と
して、ケーシングを建込むのでケーシングの損傷の恐れ
がなく、ケーシングの移動の恐れがないので杭およびケ
ーシングの芯出しが容易である。
This invention has the above-mentioned structure, and a cylindrical casing is built around the outer periphery of the pile head where the influence of horizontal force is large in a hollow pile with an open top, and concrete is poured into the outer periphery of the pile head and inside the casing together with the footing. Since it is installed and integrated, construction can be completed in one step, and the distribution of power is significantly improved. Furthermore, since the concrete 1 is placed deeper than the lower end of the casing inside the pile, there is no sudden change in the cross section, and the resistance to horizontal force is reasonable. Furthermore, since the casing is erected using the piles as guides after the piles are erected, there is no risk of damage to the casing, and there is no fear of the casing moving, making it easy to center the piles and the casing.

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

第1図、第2図および第3図は施工過程の縦断面図、第
4図、第5図は他の実施例の縦断面図、第6図、第7図
および第8図、第9図はケーシング部の異なる実施例を
示した縦断面図と横断面図である。 1・・杭、2・・掘削孔、3・・底、 4・・ケーシング、5・・ガセットプレート、6・・補
強材、7・・塞、8・・プレート、9・・コンクリート
、10・・鉄骨柱、11・・ベースプレート、12・・
フーチング部、13・・鉄筋、14・・鉄筋、15・・
取付棒、16・・鎖、17・・アングル材。 図面の浄紮(内容に変更なし)>、; 3 jxi第4
図 第51/I 第6閏 第7図 第8図 第9図 手続補正書動式) %式% 1、事件の表示 昭和59年 特 許 願 第202300号2、発明の
名称 杭頭補強方法 3、補正をする者 事件との関係 特許出願人 住所 氏 名 株式会社 巴組鐵工所 4、代理人 氏 名 東京都港区赤坂6丁目5番21号シャドー赤坂
電話(586)、8741 (内容に変更なし) 手続補正書 昭和59年12月18日 昭和59年 特 許 願第202300号2、発 明 
の名称 杭基礎構造 3、補正をする者 事件との関係 特許出願人 住所 株式会社 巴組鐵工所 氏名 4、代 理 人 〒107 東京都港区赤坂6丁l:+5番21号ンヤト
ー赤坂、補正命令の日イ」 自発補正 別紙の通り明細書、図面を全部補正する。 明 細 書 1、発明の名称 杭基礎構造 2、特許請求の範囲 頂部か開口した中空杭を所望の位置に建込み、その杭を
案内にして水平力の影響の大きい杭上部外周部に、先端
部を杭との間隙を塞ぐようにした筒形ケーシングを地盤
中に建込み、その筒形ケーシングを挿通して鉄筋を配筋
し、かつ杭上部中空内とケーシング内およびフーチング
部のコンクリートを打設して一体としであることを特徴
とする杭基礎構造。 3、発明の詳細な説明 この発明は、杭基礎構造に関し、その目的は、水平力に
十分耐えるように杭上部の所要長さを補強し、しかも杭
中空部、ケーシング内にコンクリートを打設し、ざらに
ケーシング上部にあらかじめ設けられた鉄筋挿通用孔に
配筋してフ〒チングと一体として施工能率を向上するこ
とにある。 従来一般には杭頭をフーチングに定着するためにアンカ
ー鉄筋を設けるが、引抜力、水平力によって生ずる杭上
部の曲げモーメントを考慮レストレスが落ちるのでより
問題となる。 そこて杭頭部の外周にケーシングまたは鋼管を予め、あ
るいは後から嵌めて、杭頭部または杭上部を補強する構
造のものが開発されており、例えば実公昭56−540
45号公報、特公昭48−14086号公報に示される
方法がある。 ところで前者の公報に示される場合杭頭接合部のみの補
強であり、短かい鋼管は地盤中に至らず、杭材の補強効
果はなく、しかもケーシングとの間に先に充填材を充填
しておくので施工手間が増す。また後者の公報に示され
る場合はケーシングを先に打込むのでケーシング内に土
砂が入ってケーシングを損傷する恐れがあり、また杭打
の際ケーシングが移動する恐れがある。 さらにケーシング内部の土砂の排出が困難である。 この発明は前記従来の問題点を解消すべく開発したもの
で以下その詳細を図示した実施例によって説明する。 先ず頂部が開口した中空の杭1を所望の位置の地盤中に
打込み等によって建込む。次いでその杭1を案内にして
水平力の影響の大きい杭頭部外周部に先端部を杭との間
隙を塞ぐように一部底2を設けた筒形ケーシング3を打
込み等によって建込む。なおケーシングの長さは杭径の
5倍以上で8倍以下であることが望ましい。杭1内には
数句棒4から鎖5によって懸垂することによって寒月6
を筒形ケーシング6より深い位置に配置する。 また杭1の上部において筒形ケーシング6を挿通して地
中梁7の鉄筋8を配筋し、杭1の頂部には中火に透孔を
有するプレート9を数句け、杭1内およびケーシング4
内にコンクリート10を打設し、次いて鉄骨柱11のベ
ースプレート12を前記プレート9に重ねてボルト・ナ
ツト等で結合し、次いで地中梁7部分およびフーチング
部16のコンクリートを一体的に打設する。 この発明は以上の構成からなり、頂部が開口した中空杭
の水平力の影響の大きい杭上部外周部の地盤中に筒形ケ
ーシングを建込み、杭上部中空内およびケーシング内に
フーチング部とともにコンクリートを打設して一体とす
るので施■が一工程ですみ、かつ杭頭部外周部の地盤を
 ゛圧密するので耐力の向上が著しい。またケーシング
を挿通して地中梁等の鉄筋を配筋しであるのでこの鉄筋
が杭のアンカー鉄筋となり、かつ杭頭部を補強するので
水平力に対する抵抗も合理的でかつ充分である。しかも
杭を建込んでから杭を案内として、ケーシングを建込む
のでケーシングの損傷の恐れがなく、ケーシングの移動
の恐れがないので杭およびケーシングの芯出しが容易で
ある。 1、図面の簡単な説明 第1図、第2図および第6図は施工過程の縦断面図、第
4図、第5図は要部の詳細を示した縦断面図と横断面図
である。 1・・杭、2・・底、6・・ケーソyグ、4・・取付棒
、5・・鎖、6・・塞材、7・・地中梁、8・・鉄筋、
9・・プレート、10・・コンクリート、11・・鉄骨
柱、12・・べJスプレート、16・・フーチンク部。 ・74図 す5図 kl −、−、lJ
Figures 1, 2 and 3 are longitudinal sectional views of the construction process, Figures 4 and 5 are longitudinal sectional views of other embodiments, and Figures 6, 7, 8 and 9. The figures are a longitudinal sectional view and a transverse sectional view showing different embodiments of the casing part. 1. Pile, 2. Excavation hole, 3. Bottom, 4. Casing, 5. Gusset plate, 6. Reinforcement material, 7. Closure, 8. Plate, 9. Concrete, 10.・Steel column, 11...Base plate, 12...
Footing part, 13...Reinforcement bar, 14...Reinforcement bar, 15...
Mounting rod, 16...chain, 17...angle material. Cleaning of the drawings (no changes to the content)>,; 3 jxi No. 4
Figure 51/I 6th Leap Figure 7 Figure 8 Figure 9 Procedure amendment written format) % formula % 1. Indication of the incident 1982 Patent Application No. 202300 2. Name of the invention Pile cap reinforcement method 3 , Relationship with the case of the person making the amendment Patent applicant address Name Tomoe Gumi Iron Works Co., Ltd. 4 Agent name Shadow Akasaka Telephone (586), 8741, 6-5-21 Akasaka, Minato-ku, Tokyo (Contents No change) Procedural amendment December 18, 1980 Patent Application No. 202300 2, Invention
Name of pile foundation structure 3, Relationship with the case of the person making the amendment Patent applicant address: Tomoe Gumi Iron Works Co., Ltd. Name: 4, Agent: +5-21 Nyato Akasaka, 6-chome Akasaka, Minato-ku, Tokyo 107, Japan On the day of the amendment order, the specification and drawings will be amended in their entirety as per the voluntary amendment appendix. Description 1, Name of the invention Pile foundation structure 2, Claims A hollow pile with an opening at the top is erected at a desired position, and using the pile as a guide, the tip is placed on the outer periphery of the upper part of the pile where horizontal force is large. A cylindrical casing is built in the ground so as to close the gap with the pile, and reinforcing bars are inserted through the cylindrical casing, and concrete is poured in the hollow above the pile, inside the casing, and in the footing. A pile foundation structure characterized by being installed and integrated. 3. Detailed Description of the Invention The present invention relates to a pile foundation structure, and its purpose is to reinforce the required length of the upper part of the pile so as to sufficiently withstand horizontal force, and to also strengthen the pile by pouring concrete into the hollow part of the pile and into the casing. The aim is to improve construction efficiency by placing reinforcement in holes pre-prepared in the upper part of the casing and integrating it with the footing. Conventionally, anchor reinforcing bars are generally provided to secure the pile head to the footing, but this becomes more problematic as the rest stress decreases in consideration of the bending moment at the top of the pile caused by pull-out force and horizontal force. Therefore, structures have been developed in which a casing or steel pipe is fitted around the outer circumference of the pile head in advance or afterwards to reinforce the pile head or the upper part of the pile.
There are methods shown in Japanese Patent Publication No. 45 and Japanese Patent Publication No. 48-14086. By the way, in the case shown in the former publication, only the joint of the pile head is reinforced, and the short steel pipe does not reach into the ground, so it has no reinforcing effect on the pile material, and moreover, filler material is first filled between the pipe and the casing. This increases construction time. Further, in the case shown in the latter publication, the casing is driven in first, so there is a risk that earth and sand may enter the casing and damage the casing, and there is also a risk that the casing may move during pile driving. Furthermore, it is difficult to discharge the earth and sand inside the casing. The present invention was developed to solve the above-mentioned conventional problems, and details thereof will be explained below with reference to illustrated embodiments. First, a hollow pile 1 with an open top is erected into the ground at a desired position by driving or the like. Next, using the pile 1 as a guide, a cylindrical casing 3 having a partial bottom 2 is erected on the outer periphery of the pile head, where the influence of horizontal force is large, by driving or the like so that the tip part closes the gap between the pile and the pile. The length of the casing is desirably 5 times or more and 8 times or less the pile diameter. Inside the stake 1, a number of poems 6 are suspended by a chain 5 from a stick 4.
is placed deeper than the cylindrical casing 6. In addition, the reinforcing bars 8 of the underground beam 7 are inserted through the cylindrical casing 6 in the upper part of the pile 1, and several plates 9 with medium-heat through holes are placed at the top of the pile 1. Casing 4
Then, the base plate 12 of the steel column 11 is stacked on the plate 9 and connected with bolts, nuts, etc., and then the concrete for the underground beam 7 section and the footing section 16 is poured integrally. do. This invention has the above-mentioned structure, and a cylindrical casing is built in the ground at the outer periphery of the upper part of the pile where the horizontal force of a hollow pile with an open top is large, and concrete is placed inside the hollow of the upper part of the pile and inside the casing together with the footing. Since it is cast into one piece, the installation process is completed in one step, and the ground around the outer periphery of the pile head is consolidated, resulting in a significant improvement in bearing strength. In addition, since reinforcing bars such as underground beams are inserted through the casing, these reinforcing bars serve as anchor reinforcing bars for the piles and reinforce the pile heads, so the resistance against horizontal forces is reasonable and sufficient. Furthermore, since the casing is erected using the piles as guides after the piles are erected, there is no risk of damage to the casing, and there is no fear of the casing moving, making it easy to center the piles and the casing. 1. Brief explanation of the drawings Figures 1, 2, and 6 are longitudinal cross-sectional views of the construction process, and Figures 4 and 5 are longitudinal cross-sectional views and cross-sectional views showing details of the main parts. . 1. Pile, 2. Bottom, 6. Keso Yug, 4. Mounting rod, 5. Chain, 6. Closure material, 7. Underground beam, 8. Reinforcing bar.
9... Plate, 10... Concrete, 11... Steel column, 12... Base J plate, 16... Footing part.・Figure 74 Figure 5 kl -, -, lJ

Claims (1)

【特許請求の範囲】[Claims] 頂部が開口した中空杭を所望の位置に建込み、次いでそ
の杭を案内にして水平力の影響の大きい杭頭部外周部に
、先端部を杭との間隙を塞ぐようにした筒形ケーシング
を建込み、次いで筒形ケーシングより下方に位置する塞
ぎ羽より上方の杭頭部外周部をケーシング内およびフー
チング部のコンクリートを打設して一体とすることを特
徴とする杭頭補強方法。
A hollow pile with an open top is erected at the desired position, and then, using the pile as a guide, a cylindrical casing with the tip end closing the gap between the pile and the pile is placed around the outer periphery of the pile head, where horizontal forces have a large effect. 1. A method for reinforcing a pile head, which comprises the steps of: erecting the pile, and then pouring concrete into the casing and the footing to integrate the outer periphery of the pile head above the closing wing located below the cylindrical casing.
JP20230084A 1984-09-27 1984-09-27 Pile head reinforcing method Granted JPS60203738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20230084A JPS60203738A (en) 1984-09-27 1984-09-27 Pile head reinforcing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20230084A JPS60203738A (en) 1984-09-27 1984-09-27 Pile head reinforcing method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP18230180A Division JPS57108325A (en) 1980-12-23 1980-12-23 Fixation of pile head

Publications (2)

Publication Number Publication Date
JPS60203738A true JPS60203738A (en) 1985-10-15
JPH0141773B2 JPH0141773B2 (en) 1989-09-07

Family

ID=16455261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20230084A Granted JPS60203738A (en) 1984-09-27 1984-09-27 Pile head reinforcing method

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Country Link
JP (1) JPS60203738A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001303584A (en) * 2000-04-20 2001-10-31 Nippon Steel Corp Structure for connecting head of foundation pile with footing
CN104775446A (en) * 2014-01-15 2015-07-15 广东强光海洋工程有限公司 Cylindrical pier for fixing water structure and mounting and constructing method of cylindrical pier
JP2018159177A (en) * 2017-03-22 2018-10-11 大和ハウス工業株式会社 Pile foundation structure and construction method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001303584A (en) * 2000-04-20 2001-10-31 Nippon Steel Corp Structure for connecting head of foundation pile with footing
CN104775446A (en) * 2014-01-15 2015-07-15 广东强光海洋工程有限公司 Cylindrical pier for fixing water structure and mounting and constructing method of cylindrical pier
CN104775446B (en) * 2014-01-15 2021-06-15 广东海上城建控股发展有限公司 Barrel pier for fixing water structure and installation and construction method thereof
JP2018159177A (en) * 2017-03-22 2018-10-11 大和ハウス工業株式会社 Pile foundation structure and construction method thereof

Also Published As

Publication number Publication date
JPH0141773B2 (en) 1989-09-07

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