JPH0141773B2 - - Google Patents
Info
- Publication number
- JPH0141773B2 JPH0141773B2 JP20230084A JP20230084A JPH0141773B2 JP H0141773 B2 JPH0141773 B2 JP H0141773B2 JP 20230084 A JP20230084 A JP 20230084A JP 20230084 A JP20230084 A JP 20230084A JP H0141773 B2 JPH0141773 B2 JP H0141773B2
- Authority
- JP
- Japan
- Prior art keywords
- pile
- casing
- footing
- hollow
- reinforcing bars
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims 1
- 239000011796 hollow space material Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- -1 and moreover Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Foundations (AREA)
Description
【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、さ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ーチング
と一体と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 pile foundation structure, and its purpose is to
The required length of the top of the pile is reinforced to withstand horizontal force, concrete is poured into the hollow part of the pile and inside the casing, and reinforcement is placed in the reinforcing bar insertion holes pre-prepared in the top of the casing to form the footing. The aim is to improve construction efficiency as a whole.
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
つて生ずる杭上部の曲げモーメントを考慮すると
不十分な場合があり、さらにプレストレストコン
クリート杭の上部をカツ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 installed to secure the pile head to the footing, but this may be insufficient when considering the bending moment at the top of the pile caused by pull-out force and horizontal force. Then, the prestress decreases, which becomes more of a problem.
そこで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56−34045号公報、特公昭48−14086号公
報に示される方法がある。 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 is a method shown in Publication No. 14086.
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砕が入つて
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。 By the way, in the case shown in the former publication, only the joint of the pile head was reinforced, and the short steel pipe did not reach into the ground, had no reinforcing effect on the pile material, and moreover, filler was first filled between the pipe and the casing. This increases construction time. Furthermore, in the case disclosed in the latter publication, the casing is driven in first, so there is a risk that crushed earth 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つ
て説明する。 The present invention was developed to solve the problems of the conventional art, 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を所望の位置の
地盤中に打込み等によつて建込む。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を打込み等によつて建込
む。なおケーシングの長さは杭径の３倍以上で８
倍以下であることが望ましい。杭１内には取付棒
４から鎖５によつて懸垂することによつて塞材６
を筒形ケーシング３より深い位置に配置する。 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 with a partial bottom 2 is erected on the outer periphery of the pile head, where horizontal force has a large influence, by driving or the like so that the tip part closes the gap between the pile and the pile. . The length of the casing must be 8 or more times the pile diameter.
It is desirable that it be less than twice that. A plugging material 6 is installed inside the pile 1 by suspending it from a mounting rod 4 by a chain 5.
is placed deeper than the cylindrical casing 3.
また杭１の上部において筒形ケーシング３を挿
通して地中梁７の鉄筋８を配筋し、杭１の頂部に
は中央に透孔を有するプレート９を取付け、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、次いで鉄骨柱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１３
のコンクリートを一体的に打設する。 In addition, the reinforcing bars 8 of the underground beam 7 are arranged by inserting the cylindrical casing 3 into the upper part of the pile 1, and the plate 9 having a through hole in the center is attached to the top of the pile 1.
Concrete 10 is placed inside the casing 4, and 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 underground beam 7 section and the footing section 13 are placed.
Concrete will be poured in one piece.
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工が一工程
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て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。 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, construction 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 pile as a guide after the pile is 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 pile 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、３……ケーシング、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……ベースプレ
ート、１３……フーチング部。
1, 2 and 3 are longitudinal sectional views showing the construction process, and FIGS. 4 and 5 are longitudinal sectional views and cross sectional views showing details of the main parts. 1...Pile, 2...Bottom, 3...Casing, 4...
...Mounting rod, 5...Chain, 6...Filling material, 7...Underground beam, 8...Reinforcement bar, 9...Plate, 10...Concrete, 11...Steel column, 12...Base plate, 13... ...Footing section.
Claims (1)
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てあることを特徴と
する杭基礎構造。1. A hollow pile with an open top is erected at the desired location, and using the pile as a guide, a cylindrical casing with its tip that closes the gap between the pile and the pile is placed in the ground around the outer periphery of the top of the pile, where horizontal forces have a large effect. A pile foundation structure characterized in that the structure is constructed by placing reinforcing bars through the cylindrical casing, and pouring concrete into the hollow space above the pile, the inside of the casing, and the footing.
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 JPS60203738A (en) | 1985-10-15 |
| JPH0141773B2 true 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) |
Families Citing this family (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 |
| 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 |
| JP6999281B2 (en) * | 2017-03-22 | 2022-02-10 | 大和ハウス工業株式会社 | Pile foundation structure and its construction method |
-
1984
- 1984-09-27 JP JP20230084A patent/JPS60203738A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60203738A (en) | 1985-10-15 |
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