JPS60203738A - Pile head reinforcing method - Google Patents
Pile head reinforcing methodInfo
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
Abstract
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.
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 −、−、ｌＪFigures 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)
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.
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 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60203738A (en) |
Cited By (3)
| 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 |
-
1984
- 1984-09-27 JP JP20230084A patent/JPS60203738A/en active Granted
Cited By (4)
| 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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