JPS6327620A

JPS6327620A - Expanded foot protection work for surrounding of precast pile by expanding shoe

Info

Publication number: JPS6327620A
Application number: JP16783686A
Authority: JP
Inventors: Katsuhiro Tanaka; 田中　勝寛
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-07-18
Filing date: 1986-07-18
Publication date: 1988-02-05

Abstract

PURPOSE:To increase the bearing force of a precast pile by placing concrete, etc., into a pit provided by an expanding shoe. CONSTITUTION:A pit 3 is formed in the surrounding ground of a precast pile 1 by an expanding shoe 2, and concrete or cement mortar or milk, is placed into the pit 3 for the expanded foot protection of the surrounding of the pile 1 formed. The bearing force of the pile can thus be more increased than by the conventional ones.

Description

【発明の詳細な説明】３−１　、工法の説明：本工法の施工法、および施工順
序を、添付図に基つき説明致しまず。[Detailed description of the invention] 3-1. Explanation of construction method: The construction method and construction order of this construction method will be explained based on the attached drawings.

（１）、既製杭の周辺拡大根固めの施ゴー順庄１、既製
杭に拡大シＪ、−を装着したのち杭の建て込み２、既製杭の沈設と同時に、拡大シューが杭周辺地盤を
締め固めつつ排除し、化を形成３、既製杭周辺地盤に形成された孔内にコ〉・クリート
、モルタル、セメントミルク等を打設４．２．３の繰返しによる所定位置までの既製杭の周辺
拡大根因め完了（添付［４−１参照）（２）　既製杭相互の結合の施工法１、既製杭−ＡのＩ、７１辺拡大根固め完ｒ２、既製杭
−Ａと任意間隔を保ち、既製杭−Ｂの周辺拡大根固め完
了既製杭−Ａと既製杭−Ｂの周辺拡大根固め部と二「なりを保ち、既製杭−Ｃ（ｐｃ板等の結き材〉を沈設し、既製杭−）＼、−［ミ、−Ｃの結含完ｒ〈添付ＩＪ−、−２
参照）３−２、本工法の効果と従来工法との比較木工法は主に
、既製杭の仝良を周辺拡大根固め対象範囲としている点、また周辺拡大根固めを行なう孔の形成を、拡大シューにより杭周辺地盤を締め固めつつ排除し行なつ点において、プレボーリング（地盤の事ｉｉ（掘削）をｉｉｆ提とし杭先
端部に対して拡大根固めを行なう従来の各稚工法とは根本的な違いを有していると考えます、以下に、本工法を採用する事による効果と、従来工法との比較についての詳細を述べます。(1) Expanding the surrounding area of the pre-fabricated pile and applying foot hardening. 1. After attaching the expansion shoe to the pre-fabricated pile, the pile is erected. 2. At the same time as the pre-fabricated pile is sunk, the expanding shoe expands the ground around the pile. 3. Cast concrete, mortar, cement milk, etc. into the hole formed in the ground around the ready-made pile. 4. Repeat steps 2.3 and 3. Peripheral expansion root cause completion (see attachment [4-1)] (2) Construction method 1 for joining prefabricated piles to each other, I of prefabricated pile A, 71 side expansion root hardening completed r2, arbitrary spacing with prefabricated pile A Maintaining the expanded foot hardening around the pre-fabricated pile-B, maintain the same shape as the expanded foot hardening around the pre-fabricated pile-A and pre-fabricated pile-B, and sink the pre-fabricated pile-C (tie material such as PC board). , Ready-made pile-)\,-[Mi, -C completion r
(Reference) 3-2. Comparison of the effects of this method and conventional methods The woodworking method mainly targets the area of peripheral expansion foot protection for the defects of prefabricated piles, and the formation of holes for peripheral expansion foot protection. In that the ground around the pile is compacted and removed using an expanding shoe, it is fundamentally different from the conventional construction methods in which pre-boring (excavation of the ground) is performed with expanded foot compaction at the tip of the pile. We believe that there are significant differences. Below, we will explain in detail the effects of adopting this construction method and a comparison with conventional construction methods.

（］）０本工木工の沈設方式は、施工時の状況に応じて
、打ち込み、圧入（中堀）回転等の各桟方式が選択可能でありまず、従来の工法は、たとえば、打ち込みｉｒ能な状況においてもプレボーリングを行ない施工
しなければならず、状況によっては、経済性、施工性において柔軟性に欠ける場合が生じます。(]) For the installation method of 0-piece woodwork, each method such as driving, press-in (inside hole), and rotation can be selected depending on the situation at the time of construction. Depending on the situation, pre-boring must be performed before construction, and depending on the situation, there may be a lack of flexibility in terms of economy and construction.

（２）、　Ｉ！！を製杭全長に対し拡大根固めがＯＴ能
であり、かつ、周辺地盤の締め固め効果があり、従来の工法より支持力の発現が期待できます。(2), I! ! It is possible to extend the foot reinforcement over the entire length of the pile, and it also has the effect of compacting the surrounding ground, so it can be expected to have more bearing capacity than conventional construction methods.

（３）、拡大シューがフリクションカット（杭周面摩擦
抵抗の低減）の役目を果たす事により、既製杭の沈設が容易となりまず。(3) The expanding shoe serves as a friction cut (reducing frictional resistance on the pile circumference), making it easier to sink ready-made piles.

（４）、複数の既製杭を結合した柱列連壁抗等が、拡大
根固め部を重なり合わせ、連続的に施工する事により築造されます。(4) A series of pillar columns, etc., is constructed by joining multiple pre-fabricated piles, overlapping the expanded foot protection sections, and constructing them continuously.

３−３．産業上の利用分野：建築および土木3-3. Industrial applications: architecture and civil engineering

[Brief explanation of the drawing]

（１）１図−１＝既製杭の周辺拡大根固めの施工順序に
関する図面（２）１図−２＝既製杭相互の結合の施工法にｉ旬する
図面記号表 ■＝既製杭２：拡大シュー３：拡大シューにより既製杭Ｊ４辺地盤に形成された孔４：形成された孔内に打設された、コンクリート、モル
タル、セメントミルク等５：完了した既製杭周辺拡大根固め部ＩＡ：既製杭−Ａ１Ｂ：！！Ｅ賀杭−ＢＩＣ＝既製杭−Ｃ(1) Figure 1-1 = Expansion of the surrounding area of pre-fabricated pilesDrawing regarding the construction order of foot protection (2) Figure-1-2 = Chart of drawing symbols for the construction method of connecting pre-fabricated piles to each other■ = Pre-fabricated pile 2: Enlargement Shoe 3: Hole formed in the ground on the J4 side of the ready-made pile by the expanding shoe 4: Concrete, mortar, cement milk, etc. placed in the formed hole 5: Enlarged foot hardening section around the completed ready-made pile IA: Ready-made Pile-A 1B:! ! Ega pile-B IC=ready-made pile-C

Claims

[Claims] 2-1. A construction method in which a hole is made in the ground around the ready-made pile using an expanding shoe, and then concrete, mortar, cement milk, etc. is poured into the hole to expand and harden the area around the ready-made pile. 2-2. A construction method in which ready-made piles are connected to each other by overlapping the enlarged foot protection parts around the ready-made piles, or by overlapping the enlarged foot protection parts around the ready-made piles and binding materials such as PC boards.