JP2014214458A - Method for embedding pile - Google Patents

Method for embedding pile Download PDF

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JP2014214458A
JP2014214458A JP2013091192A JP2013091192A JP2014214458A JP 2014214458 A JP2014214458 A JP 2014214458A JP 2013091192 A JP2013091192 A JP 2013091192A JP 2013091192 A JP2013091192 A JP 2013091192A JP 2014214458 A JP2014214458 A JP 2014214458A
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pile
basic
connecting pipe
bar
final
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JP6295029B2 (en
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清治 折戸
Seiji Orito
清治 折戸
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GROUNTEC KK
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    • 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
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02Placing by driving
    • E02D7/04Hand (-actuated) pile-drivers

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (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)

Abstract

PROBLEM TO BE SOLVED: To provide a method for embedding a pile structured by connecting short steel pipes and the like, which method minimizes affection by impact at driving and is excellent in expenditure and workability.SOLUTION: In a method for embedding a pile, a basic pile 11 with on end face of a bar stock 13 inserted into a connection pipe 14 and a percussion head 21 for driving the basic pile 11 are used. A tip of the percussion head 21 has a size enterable in the connection pipe 14 and a front end face 22 is planar. Then, the basic pile 11 is stood upright and stuck into a ground G with the connection pipe 14 directed above, the percussion head 21 is inserted into the connection pipe 14 and the basic pile 11 is buried, and thereafter another basic pile 11 is inserted into un upper end of the buried basic pile 11. After both of the basic piles 11 are integrated by welding, the percussion head 21 is inserted into a connection pipe 14 newly becoming an upper end, and a step for burying a plurality of basic piles integrated is conducted once or several times. The impact applied to the welding section of the connection pipe 14 can be mitigated by bringing bar stocks 13 into contact with each other.

Description

本発明は、比較的小規模な建築物の基礎の施工に用い、短尺の鋼管などを連結した構造の杭の埋め込み方法に関する。   The present invention relates to a method for embedding a pile having a structure in which short steel pipes and the like are connected to each other for construction of a foundation of a relatively small building.

建築物の基礎は、上部構造を受け止める重要な役割を担い、住宅を始めとする小規模な建築物においては、布基礎やベタ基礎と呼ばれる構造が普及している。布基礎は、線状に伸びる壁で上部構造を支えるもので、地盤が安定している場合に採用される。対するベタ基礎は、建築物の下部全体を面状に受け止めることから、地盤が不安定な場合に採用される。なお、ベタ基礎構造でも沈下が予想される場合、更なる対策として、地盤改良や杭の埋め込みなども必要になる。ただし小規模な建築物で使用する杭は、作用する荷重が比較的小さいことから、鋼管など、コストや作業効率に優れた物を使用することが多い。   The foundation of the building plays an important role in catching the superstructure. In small-scale buildings such as houses, structures called cloth foundations and solid foundations are widespread. The fabric foundation supports the superstructure with linearly extending walls, and is used when the ground is stable. On the other hand, the solid foundation receives the entire lower part of the building in a plane, and is used when the ground is unstable. If subsidence is expected even in a solid foundation structure, further measures such as ground improvement and pile embedding are required. However, piles used in small-scale buildings are often used with excellent cost and work efficiency, such as steel pipes, because the acting load is relatively small.

本願発明と関連のある特許文献を以下に示す。特許文献1では、基礎の沈下を有効に防止できるとともに、屋内で簡単に施工可能で、さらに施工コストも抑制可能な既設家屋の基礎補強工法が開示されている。この文献では、既設の基礎を貫通するように杭を打ち込み、杭と基礎を一体化することで、基礎の沈下を防止する。なお杭には、汎用の鋼管や鉄筋を使用しており、これらを短尺に切断した杭部材を複数製造した上、ジョイントで連結して長尺化している。そのため既存家屋の内部においても、天井などを撤去することなく杭の打ち込みができる。   Patent documents related to the present invention are shown below. Patent Document 1 discloses a foundation reinforcement method for an existing house that can effectively prevent settlement of the foundation, can be easily constructed indoors, and can further reduce construction costs. In this document, a pile is driven so as to penetrate an existing foundation, and the pile and the foundation are integrated to prevent settlement of the foundation. In addition, general-purpose steel pipes and reinforcing bars are used for the piles, and a plurality of pile members obtained by cutting them into short lengths are manufactured, and the lengths are increased by connecting them with joints. Therefore, piles can be driven in the existing house without removing the ceiling.

特許文献2は、古民家の再生工事などを想定した技術で、基礎構造とその構築方法が開示されている。一般に古民家と呼ばれる歴史のある木造建築物は、基礎構造が脆弱化していることが多く、再生工事ではその強化が不可欠である。そこでこの文献では、建築物の直下に複数の鋼管杭を打ち込み、この複数の鋼管杭を束ねた柱台を地表面に形成して、その上面に柱を載せている。柱台を形成することで、柱の沈下を防止でき、建築物の骨格にひずみが生じることもなく、以降の劣化を抑制できる。なお鋼管杭は、短尺の鋼管を連結部でつないだ構造で、上部の空間に制約がある場所でも、打ち込みができる。   Patent Document 2 is a technique that assumes renovation work of an old private house, and discloses a basic structure and a construction method thereof. In general, a wooden structure with a history, called an old private house, often has a weakened basic structure. Therefore, in this document, a plurality of steel pipe piles are driven directly under a building, a column base in which the plurality of steel pipe piles are bundled is formed on the ground surface, and a column is placed on the upper surface thereof. By forming the column base, the settlement of the column can be prevented, and the subsequent deterioration can be suppressed without causing distortion in the skeleton of the building. The steel pipe pile has a structure in which short steel pipes are connected by a connecting portion, and can be driven even in a place where the upper space is restricted.

特開2006−28877号公報JP 2006-28877 A 特開2010−43451号公報JP 2010-43451 A

耐震性向上や沈下防止などを目的として、既存の建築物の直下に杭を打ち込む場合、上部の空間に制約があることから、前記両特許文献のように、比較的短尺の杭を現地で連結して長尺化することが多い。その場合、短尺の杭同士を連結する箇所は、強度上の弱点となり、打ち込み時の衝撃で破損してしまい、以降の作業を継続できないことがある。またこの変形により、新たな杭の連結が難しくなることもある。   When driving piles directly under an existing building for the purpose of improving earthquake resistance or preventing settlement, there is a restriction on the upper space, so relatively short piles are connected locally as in both patent documents. In many cases, the length is increased. In that case, the place which connects short piles becomes a weak point on intensity | strength, it will be damaged by the impact at the time of driving in, and subsequent work may not be continued. This deformation may also make it difficult to connect new piles.

そのほか建築物を解体する際、原状回復のため、杭の引き抜きを要求されることがある。そのため短尺の杭を長尺化する場合、隣接する短尺の杭同士は、溶接やピンやボルトなどの手段で連結して、打ち込みから相当の時間を経過した後も、無理なく全体を引き抜けるよう、配慮を要する。この杭同士を連結する手段のうち、溶接以外は、事前に孔やネジなどの加工が不可欠で、費用の増加が避けられない。しかも打ち込み時、現地で杭を自在に切断することもできず、柔軟性が低下する。そこで溶接が最適な手段となるが、溶接は、打ち込みと並行して行うことから、作業性などに万全の対策を講じるべきである。   In addition, when dismantling the building, it may be required to pull out the pile to restore its original shape. Therefore, when lengthening a short pile, adjacent short piles are connected by means such as welding or pins and bolts, and after a considerable time has passed since driving, Consideration is required. Of these means for connecting the piles, processing such as holes and screws is indispensable except for welding, and an increase in cost is inevitable. Moreover, when driving, the pile cannot be cut freely at the site, which reduces flexibility. Therefore, welding is the optimal means, but since welding is performed in parallel with driving, perfect measures should be taken for workability and the like.

本発明はこうした実情を基に開発されたもので、打ち込み時の衝撃による影響を最小限に留め、また費用や作業性の面でも優れており、短尺の鋼管などを連結した構造の杭の埋め込み方法の提供を目的としている。   The present invention was developed on the basis of such circumstances, minimizing the impact caused by impact during driving, and excellent in cost and workability, and embedding piles with a structure in which short steel pipes are connected. The purpose is to provide a method.

前記の課題を解決するための請求項1記載の発明は、鋼管などの棒材と筒状の連結管とを一体化した基本杭と、該基本杭を打ち込むための打撃ヘッドと、を用い、前記基本杭は、前記棒材の一端面を前記連結管のほぼ中央まで差し込んだもので、前記打撃ヘッドの先端部は、前記連結管の中に入り込むことのできる大きさで且つその先端面は略平面状としてあり、連結管を上に向けた姿勢で前記基本杭を直立させて地盤に突き刺し、連結管の中に前記打撃ヘッドを差し込み棒材を押圧し、該基本杭を地盤に埋め込み、以降、埋め込まれた基本杭上端の連結管の中に別の基本杭を差し込み、双方を溶接で一体化した後、新たに上端となった連結管の中に前記打撃ヘッドを差し込み棒材を押圧し、一体化された複数の基本杭を地盤に埋没させる過程を一回または複数回行うことを特徴とする杭の埋め込み方法である。   The invention according to claim 1 for solving the above problem uses a basic pile in which a bar such as a steel pipe and a cylindrical connecting pipe are integrated, and a striking head for driving the basic pile. The basic pile is one in which one end surface of the bar is inserted to substantially the center of the connecting pipe, and the tip of the striking head is sized to be able to enter the connecting pipe, and the tip surface is It is in a substantially flat shape, the basic pile is erected in a posture with the connecting pipe facing upward, stabbed into the ground, the striking head is inserted into the connecting pipe, the bar is pressed, and the basic pile is embedded in the ground, After that, after inserting another basic pile into the connecting pipe at the upper end of the embedded basic pile and integrating both by welding, insert the impact head into the connecting pipe at the upper end and press the bar Overloading the integrated basic piles in the ground. Which is a method of embedding piles, which comprises carrying out one or more times.

本発明は、軟弱地盤に新たな建築物を施工する際や、基礎構造が脆弱な古民家の改築などでの使用を想定しており、短尺の鋼管などを用いた杭を連結しながら地盤に打ち込んで行く。そのため鉄筋コンクリート構造など、大規模な建築物での使用は想定していない。ただし建築物の基礎構造のほか、路盤やコンクリートブロックなどの沈下防止対策として使用することもできる。   The present invention is intended for use in constructing a new building on soft ground or in renovating an old private house where the foundation structure is weak, while connecting piles using short steel pipes to the ground. I'm going to go. Therefore, it is not assumed to be used in large-scale buildings such as reinforced concrete structures. However, in addition to the basic structure of buildings, it can also be used to prevent settlement of roadbeds and concrete blocks.

基本杭は、鋼管を始めとした金属製の棒材の一端面に連結管を接合した構造で、その長さや大きさは、人力で持ち運びできる程度に抑制する。棒材は、溶接を考慮して金属製を前提としており、入手性や強度などを考慮して、建築資材として広く流通している鋼管を使用することが多い。次に連結管は、上下に隣接する二本の棒材を一体化する役割を担い、内部に棒材を差し込むことのできる筒状で、二本の棒材を跨ぐように配置され、当然ながら棒材よりも短尺である。   The basic pile is a structure in which a connecting pipe is joined to one end face of a metal bar such as a steel pipe, and its length and size are suppressed to such an extent that it can be carried by human power. The rod is assumed to be made of metal in consideration of welding, and steel pipes that are widely distributed as building materials are often used in consideration of availability and strength. Next, the connecting pipe plays a role of integrating two adjacent bars in the upper and lower sides, is a cylindrical shape into which the bar can be inserted, and is arranged so as to straddle the two bars. It is shorter than a bar.

連結管の内部は、棒材を無理なく差し込み可能な寸法とするが、必要以上に隙間を設ける必要はない。また連結管の強度や耐食性などは、少なくとも棒材と同等とする。そして基本杭を製造する際は、まず棒材の一端面を連結管のほぼ中央(全長の半分)まで差し込み、その後、溶接などで双方を一体化する。なお溶接の際は、連結管の端面と棒材の側周面で構成される角部を埋めるようにビードを載せていく。   The inside of the connecting pipe is dimensioned so that the bar can be inserted without difficulty, but it is not necessary to provide a gap more than necessary. Further, the strength and corrosion resistance of the connecting pipe are at least equivalent to those of the bar material. And when manufacturing a basic pile, first, the one end surface of a bar is inserted to the approximate center (half the full length) of a connecting pipe, and then both are integrated by welding or the like. During welding, beads are placed so as to fill corners formed by the end surface of the connecting pipe and the side peripheral surface of the bar.

基本杭を打ち込む際は、まず連結管を上に向けて全体を直立させる。そして、基本杭の下端面を地盤に接触させた後、基本杭の上部を打撃ヘッドで繰り返し押圧すると、徐々に地盤に埋め込まれていく。なお基本杭は、必要に応じて現地で製造することもできるが、作業効率の観点から、あらかじめ工場内で量産しておくことが好ましい。   When driving a basic pile, the whole is upright with the connecting pipe facing up. And after making the lower end surface of a basic pile contact the ground, if the upper part of a basic pile is repeatedly pressed with a striking head, it will be gradually embedded in the ground. In addition, although a basic pile can also be manufactured locally as needed, it is preferable to mass-produce in a factory beforehand from a viewpoint of work efficiency.

打撃ヘッドは、基本杭を押圧して地盤に打ち込むために使用するもので、エアーハンマーなど、杭打ち用の機械に組み込む。打撃ヘッドの先端部分は、基本杭に対応させる必要があり、連結管の中に無理なく入り込むことのできる形状とする。さらに打撃ヘッドの先端面は、あらゆる位置で棒材と接触できるよう、中空状としてはならず、ほぼ平面状に塞がれているものとする。   The striking head is used to press the basic pile and drive it into the ground, and is built into a pile driving machine such as an air hammer. The tip portion of the striking head needs to correspond to the basic pile, and has a shape that can easily enter the connecting pipe. Further, the tip surface of the striking head should not be made hollow, but should be almost flat so that it can come into contact with the bar at any position.

打撃ヘッドの形状をこのように限定することで、打撃ヘッドは、連結管を押圧することなく、棒材を直接押圧することになる。そのため打ち込み時の衝撃は、棒材と連結管との接合部に伝達することがなく、この部位の破損を防止できる。なお、打撃ヘッドと接触する棒材の上端部は、衝撃による変形が避けられない。しかし棒材の上端部の外周は、連結管に囲まれており、変形は内向きに限定され、さらに打撃ヘッドの先端面は平面状である。そのため変形後についても、棒材の上端面と打撃ヘッドの先端面は、無理なく接触可能で、最終段階まで円滑に作業を継続できる。   By limiting the shape of the hitting head in this way, the hitting head presses the bar directly without pressing the connecting pipe. Therefore, the impact at the time of driving is not transmitted to the joint portion between the bar and the connecting pipe, and damage to this portion can be prevented. In addition, the upper end part of the bar which contacts the striking head is unavoidable to be deformed by impact. However, the outer periphery of the upper end of the bar is surrounded by the connecting pipe, the deformation is limited inward, and the tip surface of the striking head is planar. Therefore, even after deformation, the upper end surface of the bar and the tip surface of the striking head can be contacted without difficulty, and the operation can be continued smoothly until the final stage.

施工時は、まず一本の基本杭を所定の位置に持ち込み、その連結管を上に向けて全体を直立させる。次に、打撃ヘッドをエアーハンマーなどに組み込み、基本杭の倒れを阻止しながら打撃ヘッドを連結管に差し込み、基本杭の打ち込みを開始する。そして基本杭の大半が埋没した後、上端の連結管には、別の基本杭の棒材を差し込む。この基本杭は自重で落下して、上下に隣接する棒材の端面同士は、自然に接触する。引き続き、上下の基本杭を溶接で一体化すると、長尺化した杭が構築される。なおこの溶接は、連結管の上端面と、棒材の側周面で構成される角部を埋めるようにビードを載せていく。この後、最上端の連結管に打撃ヘッドを差し込み、打ち込み作業を継続する。   At the time of construction, first, a basic pile is brought to a predetermined position, and the whole is made upright with the connecting pipe facing upward. Next, the striking head is installed in an air hammer or the like, and the striking head is inserted into the connecting pipe while preventing the base pile from falling, and the driving of the basic pile is started. And after most of the basic piles are buried, the bar material of another basic pile is inserted into the connecting pipe at the upper end. The basic pile falls by its own weight, and the end surfaces of the bar materials adjacent to each other in the vertical direction naturally come into contact with each other. Subsequently, when the upper and lower basic piles are integrated by welding, an elongated pile is constructed. In this welding, a bead is placed so as to fill a corner formed by the upper end surface of the connecting pipe and the side peripheral surface of the bar. Thereafter, the striking head is inserted into the uppermost connecting pipe, and the driving operation is continued.

本発明では、打ち込みを終えた基本杭の上端に別の基本杭を差し込み、双方を溶接で一体化した後、全体を打ち込むまでの過程を一回ないし二回以上継続して、地盤中に長尺化した杭を構築する。その過程において、新たに差し込んだ基本杭を溶接で一体化する作業は、連結管の上端面を利用するため、ビードの流動が抑制され、ビードを安定して載せることができる。そのため作業性に優れるほか、強度も確保しやすく、経年後に引き抜く際も、途中で破断することがない。そのほか上下に隣接する基本杭は、双方の棒材の端面同士が接触している。したがって打撃ヘッドによる衝撃は、連結管に直接作用することがなく、棒材と連結管との接合部を破損することもない。   In the present invention, another basic pile is inserted into the upper end of the basic pile that has been driven in, both are integrated by welding, and then the entire process is continued once or twice until the entire pile is long. Build a scaled pile. In the process, since the work of integrating the newly inserted basic pile by welding uses the upper end surface of the connecting pipe, the flow of the bead is suppressed and the bead can be placed stably. Therefore, in addition to excellent workability, it is easy to ensure the strength, and when it is pulled out after aging, it does not break in the middle. In addition, the basic piles adjacent to each other are in contact with each other at the end faces of both bars. Therefore, the impact by the striking head does not directly act on the connecting pipe, and does not damage the joint between the bar and the connecting pipe.

請求項2記載の発明は、鋼管などの棒材と筒状の連結管とを一体化した基本杭と、該基本杭を打ち込むための打撃ヘッドと、鋼管などの棒材だけからなる最終杭と、該最終杭を打ち込むための最終打撃ヘッドと、を用い、前記基本杭は、前記棒材の一端面を前記連結管のほぼ中央まで差し込んだもので、前記打撃ヘッドの先端部は、前記連結管の中に入り込むことのできる大きさで且つその先端面は略平面状としてあり、前記最終打撃ヘッドの先端面には、前記最終杭の上端部を嵌め込むことのできる凹部を形成してあり、連結管を上に向けた姿勢で前記基本杭を直立させて地盤に突き刺し、連結管の中に前記打撃ヘッドを差し込み棒材を押圧し、該基本杭を地盤に埋め込み、以降、埋め込まれた基本杭上端の連結管の中に別の基本杭を差し込み、双方を溶接で一体化した後、新たに上端となった連結管の中に前記打撃ヘッドを差し込み棒材を押圧し、一体化された複数の基本杭を地盤に埋没させる過程を一回または複数回行い、最後に、埋め込まれた基本杭上端の連結管の中に前記最終杭を差し込み、双方を溶接で一体化した後、該最終杭の上端部に前記最終打撃ヘッドを嵌め込み最終杭を押圧し、全体を地盤に埋没させることを特徴とする杭の埋め込み方法である。   The invention according to claim 2 is a basic pile in which a bar material such as a steel pipe and a tubular connecting pipe are integrated, a striking head for driving the basic pile, and a final pile consisting only of a bar material such as a steel pipe; A final striking head for driving the final pile, and the basic pile is formed by inserting one end face of the bar material to substantially the center of the connecting pipe, and the leading end of the striking head is connected to the connecting head. It has a size that can be inserted into the pipe and its tip end surface is substantially flat, and the tip end surface of the final striking head has a recess into which the upper end of the final pile can be fitted. The basic pile is placed upright with the connecting pipe facing upward, stabbed into the ground, the striking head is inserted into the connecting pipe, the bar is pressed, the basic pile is embedded in the ground, and then embedded Insert another basic pile into the connecting pipe at the top of the basic pile. Once the two sides are integrated by welding, the process is performed once by inserting the striking head into the new upper connecting pipe, pressing the bar, and burying the integrated basic piles in the ground. Or, a plurality of times, and finally, the final pile is inserted into the connecting pipe at the upper end of the embedded basic pile, and both are integrated by welding, and then the final impact head is fitted into the upper end of the final pile. This is a method for embedding piles, characterized in that the whole is buried in the ground.

請求項1記載の発明は、複数の基本杭を溶接で一体化して、長尺化された杭を地盤中に構築するものだが、この長尺化された杭の上端については、基礎構造との兼ね合いから連結管を撤去したい場合がある。請求項2記載の発明は、このような状況を考慮したもので、請求項1記載の発明による基本杭と打撃ヘッドに加えて、最終杭と、最終打撃ヘッドを用いたことを特徴とする。   The invention described in claim 1 integrates a plurality of basic piles by welding, and constructs an elongated pile in the ground. The upper end of the elongated pile is the same as that of the foundation structure. You may want to remove the connecting pipe from the balance. The invention described in claim 2 takes this situation into consideration, and is characterized in that, in addition to the basic pile and the hitting head according to the invention described in claim 1, the final pile and the final hitting head are used.

最終杭は、基本杭の棒材単体と同じ物だが、その全長は自在に決めて構わない。また最終打撃ヘッドは、最終杭の上端部を打ち込むための物で、その先端面には、最終杭の上端部を嵌め込むための凹部を形成する。この凹部に最終杭の上端部が嵌まり込むことで、上端部の変形を規制しながら打ち込み作業を行うことができる。なお凹部の具体的な断面形状は、最終杭に応じて自在に決めることができ、仮に最終杭が鋼管であれば、凹部は環状とすることが多い。   The final pile is the same as the base material of the basic pile, but its total length can be freely determined. The final striking head is a thing for driving the upper end of the final pile, and a recess for fitting the upper end of the final pile is formed on the tip surface. When the upper end portion of the final pile is fitted into the recess, the driving operation can be performed while restricting the deformation of the upper end portion. In addition, the concrete cross-sectional shape of a recessed part can be freely determined according to a final pile, and if a final pile is a steel pipe, a recessed part will be cyclic | annular in many cases.

施工時はまず、複数の基本杭を連結しながら地盤に埋め込み、最上端の連結管が地盤に接近した状態とする。その後、最上端の連結管の中に最終杭を差し込み、さらに連結管の上端面と最終杭の側周面を溶接で一体化する。次に、最終打撃ヘッドを最終杭の上端部に嵌め込み、打ち込みを行うと、最終杭も地盤に埋め込まれ、複数の基本杭と一本の最終杭が一体化した長尺の杭が地盤中に構築される。   At the time of construction, first, a plurality of basic piles are connected to the ground, and the uppermost connecting pipe is brought close to the ground. Thereafter, the final pile is inserted into the uppermost connecting pipe, and the upper end surface of the connecting pipe and the side peripheral surface of the final pile are integrated by welding. Next, when the final striking head is fitted to the upper end of the final pile and driven, the final pile is also embedded in the ground, and a long pile with multiple basic piles and one final pile integrated into the ground Built.

請求項1記載の発明のように、棒材と連結管で基本杭を構成して、基本杭の打ち込みと、基本杭同士の連結を繰り返して、地盤中に長尺の杭を構築することで、既存の建築物の改修などで上部空間に制約がある場合でも、無理なく作業を進めることができる。なお隣接する二個の基本杭は、一方の棒材の一端面を相手方の連結管の中に差し込み、双方を溶接で一体化する。そのため上下に隣接する棒材は、端面同士が接触することになる。   By constructing a basic pile with a bar and a connecting pipe as in the invention described in claim 1, repeating the driving of the basic pile and the connection between the basic piles, and constructing a long pile in the ground Even if there is a restriction in the upper space due to renovation of an existing building, work can be carried out without difficulty. In addition, two adjacent basic piles insert one end surface of one bar into the other connecting pipe, and integrate both by welding. Therefore, the end surfaces of the bar materials adjacent to each other in the vertical direction are in contact with each other.

本発明では、打撃ヘッドが連結管の中に差し込まれ、棒材と直に接触するほか、上下に並ぶ棒材の端面同士が接触することから、打ち込み時の衝撃は、棒材だけを経由して最先端まで伝達する。そのため、連結管に作用する衝撃はわずかで、基本杭同士の連結箇所の破損を防止できるほか、上下に並ぶ基本杭は打ち込み後も一体化しており、後に引き抜くことも容易である。   In the present invention, the striking head is inserted into the connecting pipe and comes into direct contact with the bar, and since the end surfaces of the bar arranged side by side are in contact with each other, the impact at the time of driving only passes through the bar. Communicate to the cutting edge. For this reason, the impact acting on the connecting pipe is small, and damage to the connecting portion between the basic piles can be prevented, and the basic piles arranged vertically are integrated after being driven in and can be easily pulled out later.

また、打撃ヘッドを連結管の中に差し込むことで、打撃ヘッドのブレが規制され、棒材の端面を確実に押圧でき、作業を円滑に進められるほか、安全性にも優れる。さらに、打ち込み時の衝撃で棒材の端部が変形した場合でも、その変形は連結管の内部に抑え込まれる。そのため隣接する棒材同士は、変形した後も必ず接触可能で、打撃ヘッドによる衝撃を確実に伝達することができる。   In addition, by inserting the striking head into the connecting pipe, the blurring of the striking head is regulated, the end face of the bar can be reliably pressed, the work can be smoothly performed, and the safety is also excellent. Furthermore, even when the end portion of the bar is deformed by an impact at the time of driving, the deformation is suppressed inside the connecting pipe. Therefore, the adjacent bar members can always contact each other even after being deformed, and the impact by the striking head can be reliably transmitted.

上下に隣接する基本杭は、溶接で一体化されるため、基本杭には孔やネジなどを加工する必要がなく、単に棒材を所定の長さに切断するだけでよい。そのため事前の手間が削減され、費用を抑制できる。しかも打ち込みの直前においても、棒材を切断することで、長さを調整可能で、設計変更などにも柔軟に対応できる。そのほか基本杭を溶接で一体化する際は、連結管の上端面にビードの載せるため、ビードの流失がなく、作業が容易で十分な強度を確保できる。   Since the basic piles adjacent to each other are integrated by welding, it is not necessary to process holes or screws in the basic pile, and it is only necessary to cut the bar to a predetermined length. Therefore, the time and effort required in advance can be reduced, and the cost can be suppressed. Moreover, the length can be adjusted by cutting the bar just before driving, and it is possible to flexibly cope with design changes. In addition, when the basic pile is integrated by welding, a bead is placed on the upper end surface of the connecting pipe, so there is no loss of the bead and the work is easy and sufficient strength can be ensured.

請求項2記載の発明のように、複数の基本杭を連結しながら地盤に埋め込んだ後、最上端の連結管の中に最終杭を差し込み、双方を溶接で一体化した上、最終打撃ヘッドで最終杭を打ち込み、長尺の杭を完成させることで、杭の最上端の連結管が不要になる。そのため、連結管の使用数が削減され費用を抑制できるほか、最終杭が建築物の下部構造と直結することで、建築物の荷重が最終杭と棒材で受け止められ、強度上も有利になる。   As in the invention described in claim 2, after the plurality of basic piles are connected and embedded in the ground, the final pile is inserted into the uppermost connecting pipe, both are integrated by welding, and the final impact head is used. By driving the final pile and completing the long pile, the connecting pipe at the top end of the pile is not necessary. Therefore, the number of connecting pipes can be reduced and the cost can be reduced, and the final pile is directly connected to the lower structure of the building, so that the load of the building is received by the final pile and the bar, which is advantageous in terms of strength. .

本発明による杭の埋め込み方法の概要を示す図である。It is a figure which shows the outline | summary of the embedding method of the pile by this invention. 図1の基本杭を埋め込む過程を縦断面で示すもので、図の左から右に向けて作業が進んでいく。The process of embedding the basic pile of FIG. 1 is shown in a longitudinal section, and the work proceeds from the left to the right in the figure. 複数の基本杭を連結した後、その最上部に最終杭を組み込む場合を示す図である。It is a figure which shows the case where a last pile is integrated in the uppermost part, after connecting a some basic pile. 図3の最終杭を埋め込む過程を縦断面で示すもので、図の左から右に向けて作業が進んでいく。The process of embedding the final pile in FIG. 3 is shown in a vertical section, and the work proceeds from the left to the right in the figure. 本発明による杭の埋め込み方法を用いて、小規模な建築物を改修する場合を示す図である。It is a figure which shows the case where a small building is renovated using the pile embedding method by this invention.

図1は、本発明による杭の埋め込み方法の概要を示している。本発明は、基本杭11を直列につないで一本の長尺の杭Pを構築する方法に関するもので、基本杭11は、汎用の鋼管を切り出した棒材13と、円筒状で金属製の連結管14を一体化したものである。棒材13と連結管14を一体化する際は、棒材13の一端面を連結管14のほぼ中央まで差し込み、連結管14の下端面と棒材13の側周面で構成される角部を埋めるように溶接を行う。なお基本杭11の長さや重量は、人力で持ち運びできる程度に抑制する。また基本杭11は、現地でも製造可能だが、作業環境や生産性の観点から、あらかじめ工場で量産することが好ましい。   FIG. 1 shows an outline of a pile embedding method according to the present invention. The present invention relates to a method for constructing a single long pile P by connecting basic piles 11 in series. The basic pile 11 is made of a bar 13 cut out of a general-purpose steel pipe, and a cylindrical metal product. The connecting pipe 14 is integrated. When integrating the bar 13 and the connecting pipe 14, one end surface of the bar 13 is inserted almost to the center of the connecting pipe 14, and a corner portion constituted by the lower end surface of the connecting pipe 14 and the side peripheral surface of the bar 13. Weld to fill. In addition, the length and weight of the basic pile 11 are suppressed to such an extent that they can be carried by human power. Moreover, although the basic pile 11 can be manufactured locally, it is preferable to mass-produce at a factory beforehand from a viewpoint of work environment or productivity.

基本杭11の打ち込みには、エアーハンマー31を使用する。エアーハンマー31は、圧縮空気で内部のピストンを上下方向に移動させる構造で、ここで使用する物は、人力での取り扱いを前提としており、上部に保持用のハンドル32が伸びている。また基本杭11を打ち込むため、エアーハンマー31には、専用の打撃ヘッド21を取り付ける。打撃ヘッド21はおおむね円錐状の外観で、その下部は、連結管14の中に無理なく入り込むことのできる外径としてある。なお、打撃ヘッド21をエアーハンマー31に取り付けるため、打撃ヘッド21の上部には円柱状のシャンク23を形成してあり、エアーハンマー31の下端には、シャンク23を保持するチャック33を備えている。チャック33で保持された打撃ヘッド21は、エアーハンマー31により、激しく上下に移動することができる。   An air hammer 31 is used to drive the basic pile 11. The air hammer 31 has a structure in which an internal piston is moved in the vertical direction with compressed air. The thing used here is premised on handling by human power, and a handle 32 for holding extends at the top. Further, in order to drive the basic pile 11, a dedicated striking head 21 is attached to the air hammer 31. The striking head 21 has a generally conical appearance, and its lower part has an outer diameter that can easily enter the connecting pipe 14. In order to attach the striking head 21 to the air hammer 31, a cylindrical shank 23 is formed on the top of the striking head 21, and a chuck 33 for holding the shank 23 is provided at the lower end of the air hammer 31. . The striking head 21 held by the chuck 33 can be moved up and down violently by the air hammer 31.

地盤Gに杭Pを構築する際は、まず一個の基本杭11を打ち込み位置に搬入して、連結管14を上に向けた姿勢で全体を直立させ、棒材13の下端面を地盤Gに接触させる。またエアーハンマー31のチャック33には、打撃ヘッド21を組み込んでおく。次に、打撃ヘッド21を連結管14の中に差し込み、エアーハンマー31を作動させると、打撃ヘッド21の先端面22が棒材13の上端面に接触して、次第に基本杭11が地盤Gに打ち込まれていく。そして、連結管14が地盤Gに接近した時点で、打ち込みを一旦終了して、この基本杭11の連結管14に別の基本杭11を差し込み、双方を溶接で一体化すると、基本杭11をつないだ杭Pが構築される。その後、最上部に位置する連結管14の中に打撃ヘッド21を差し込み、打ち込みを再開する。   When constructing the pile P on the ground G, first, the single basic pile 11 is carried into the driving position, the whole is made upright with the connecting pipe 14 facing upward, and the lower end surface of the bar 13 is placed on the ground G. Make contact. Further, the impact head 21 is incorporated in the chuck 33 of the air hammer 31. Next, when the striking head 21 is inserted into the connecting pipe 14 and the air hammer 31 is operated, the tip surface 22 of the striking head 21 comes into contact with the upper end surface of the bar 13, and the basic pile 11 gradually becomes the ground G. It is driven in. When the connecting pipe 14 approaches the ground G, the driving is temporarily stopped, another basic pile 11 is inserted into the connecting pipe 14 of the basic pile 11, and both are integrated by welding. The connected pile P is constructed. Thereafter, the striking head 21 is inserted into the connecting pipe 14 located at the top, and the driving is resumed.

図1のように、比較的短尺の基本杭11を連結して長尺の杭Pを構築することは、ありふれた方法に過ぎない。しかし本発明では、専用の打撃ヘッド21を用いており、その先端が連結管14の中に入り込み、棒材13を直接押圧する。また上下に隣接する棒材13は、端面同士が接触する。そのため打撃ヘッド21による衝撃は、連結管14に直接作用することがなく、溶接箇所の破損などを防止できる。さらに打撃ヘッド21は、連結管14の中を上下に移動するため、打撃ヘッド21のブレが規制され、作業の安全性や確実性が向上する。   As shown in FIG. 1, it is only a common method to construct a long pile P by connecting relatively short basic piles 11. However, in the present invention, a dedicated striking head 21 is used, the tip of which enters the connecting pipe 14 and directly presses the bar 13. Moreover, the end surfaces of the bar 13 adjacent vertically are in contact with each other. Therefore, the impact by the striking head 21 does not directly act on the connecting pipe 14 and can prevent the welded portion from being damaged. Furthermore, since the striking head 21 moves up and down in the connecting pipe 14, the blurring of the striking head 21 is restricted, and the safety and certainty of work are improved.

図2は、図1の基本杭11を埋め込む過程を縦断面で示すもので、図の左から右に向けて作業が進んでいく。この図のように基本杭11は、一本の棒材13と一個の連結管14を溶接で一体化したもので、棒材13の上端部は、連結管14の中央まで差し込まれている。さらに、連結管14の下端面と棒材13の側周面で構成される角部には、溶接によるビード12が付着している。   FIG. 2 shows a process of embedding the basic pile 11 of FIG. 1 in a longitudinal section, and the work proceeds from the left to the right in the figure. As shown in this figure, the basic pile 11 is obtained by integrating one bar 13 and one connecting pipe 14 by welding, and the upper end of the bar 13 is inserted to the center of the connecting pipe 14. Furthermore, the bead 12 by welding adheres to the corner portion constituted by the lower end surface of the connecting pipe 14 and the side peripheral surface of the bar 13.

埋め込み作業を開始する時は、一番左に描くように、一本の基本杭11を直立させて、その棒材13の下端部をわずかに地盤Gに埋め込むほか、打撃ヘッド21をエアーハンマー31に組み込む。次に、打撃ヘッド21を連結管14の中に差し込み、棒材13の上端面を打撃ヘッド21で押圧していくと、やがて左から二番目に描くように、連結管14が地盤Gに接近する。そこで一旦押圧を終了して、この連結管14の真上に別の基本杭11を差し込む。   When starting the embedding operation, as shown on the leftmost side, one basic pile 11 is erected, and the lower end portion of the bar 13 is slightly embedded in the ground G, and the striking head 21 is moved to the air hammer 31. Incorporate into. Next, when the striking head 21 is inserted into the connecting pipe 14 and the upper end surface of the bar 13 is pressed by the striking head 21, the connecting pipe 14 approaches the ground G so as to draw the second from the left. To do. Therefore, once the pressing is finished, another basic pile 11 is inserted directly above the connecting pipe 14.

地盤Gに打ち込んだ基本杭11の上に差し込んだ別の基本杭11は、自重で落下していき、双方の棒材13の端面同士が接触する。その後、地盤Gに打ち込んだ基本杭11の連結管14の上端面と、上方から差し込んだ基本杭11の棒材13の側周面を溶接で一体化すると、左から三番目に描くように、上下の基本杭11が一体化する。この溶接によるビード15は、自然に連結管14の上端面に載るため、現地での作業性に優れている。なお上下に並ぶ基本杭11は、溶接で一体化するため、棒材13や連結管14には、孔やネジなどを一切加工する必要がない。   Another basic pile 11 inserted on the basic pile 11 driven into the ground G falls by its own weight, and the end faces of both bars 13 come into contact with each other. Then, when the upper end surface of the connecting pipe 14 of the basic pile 11 driven into the ground G and the side peripheral surface of the bar 13 of the basic pile 11 inserted from above are integrated by welding, as depicted in the third from the left, The upper and lower basic piles 11 are integrated. Since the welded bead 15 is naturally placed on the upper end surface of the connecting pipe 14, the workability at the site is excellent. Since the basic piles 11 arranged vertically are integrated by welding, it is not necessary to process any holes or screws in the bar 13 or the connecting pipe 14.

最後に、一番右に描くように、最上部の連結管14の中に打撃ヘッド21を差し込み、打ち込みを再開すると、地盤G中には、二本の基本杭11を一体化した杭Pが構築される。この図のように、上下の棒材13は接触しており、打撃ヘッド21による衝撃は、上下に並ぶ棒材13だけを経由して最先端まで伝達するため、連結管14上下のビード12、15に作用する荷重は抑制される。なおこの図では、基本杭11を二本つないでいるが、実際には、基本杭11の連結と打ち込みを繰り返すことで、より長尺化することができる。   Finally, as shown on the rightmost side, when the striking head 21 is inserted into the uppermost connecting pipe 14 and driving is resumed, a pile P in which the two basic piles 11 are integrated in the ground G. Built. As shown in this figure, the upper and lower bar members 13 are in contact with each other, and the impact by the striking head 21 is transmitted to the forefront only through the bar members 13 arranged in the upper and lower directions. The load acting on 15 is suppressed. In addition, in this figure, although the two basic piles 11 are connected, in fact, it can lengthen more by repeating the connection and driving-in of the basic pile 11.

棒材13には汎用の鋼管を用いており、その肉厚も有限であるため、打撃ヘッド21による押圧で、棒材13が変形することもある。ただし棒材13の上端部外周は、連結管14で取り囲まれており、変形は内周方向に限定される。さらに打撃ヘッド21の先端面22は、ほぼ平面状に仕上げてある。そのため棒材13の変形は、凹凸が生じることなく均等に進み、変形後についても、隣接する棒材13とは無理なく接触できる。   Since a general-purpose steel pipe is used for the bar 13 and its wall thickness is finite, the bar 13 may be deformed by pressing by the striking head 21. However, the outer periphery of the upper end of the bar 13 is surrounded by the connecting pipe 14, and the deformation is limited to the inner peripheral direction. Furthermore, the front end surface 22 of the striking head 21 is finished in a substantially flat shape. Therefore, the deformation of the bar 13 proceeds evenly without causing unevenness, and even after the deformation, it can be reasonably contacted with the adjacent bar 13.

図3は、複数の基本杭11を連結した後、その最上部に最終杭16を組み込む場合を示している。連結管14は、上下の基本杭11を連結するためのもので、杭Pの最上部では不要である。そこでこの図のように、杭Pの最上部には、最終杭16を連結することもできる。最終杭16は、基本杭11の棒材13と同じ物で、持ち運びや施工を考慮した長さとしている。なお最終杭16の連結方法は、基本杭11の場合と全く同じで、連結管14の中に最終杭16を差し込み、双方を溶接で一体化する。   FIG. 3 shows a case where the final pile 16 is assembled at the uppermost part after the plurality of basic piles 11 are connected. The connecting pipe 14 is for connecting the upper and lower basic piles 11 and is not necessary at the top of the pile P. Therefore, as shown in this figure, the final pile 16 can be connected to the top of the pile P. The final pile 16 is the same as the bar 13 of the basic pile 11 and has a length that allows for carrying and construction. The connection method of the final pile 16 is exactly the same as that of the basic pile 11, and the final pile 16 is inserted into the connection pipe 14, and both are integrated by welding.

最終杭16の押圧には、専用の最終打撃ヘッド26を使用する。仮に図1の打撃ヘッド21で最終杭16を押圧するならば、打撃ヘッド21のブレを規制することができず、打撃位置が都度異なり、最終杭16の上端部が不規則に変形するほか、安全性も低下する。そこで最終杭16については、専用の最終打撃ヘッド26を使用する。   A dedicated final striking head 26 is used to press the final pile 16. If the final pile 16 is pressed with the impact head 21 of FIG. 1, the blur of the impact head 21 cannot be regulated, the impact position is different each time, and the upper end of the final pile 16 is irregularly deformed, Safety is also reduced. Therefore, a dedicated final striking head 26 is used for the final pile 16.

最終打撃ヘッド26の下面には、最終杭16の上端部を嵌め込むため、環状の凹部27を形成してあり、さらに凹部27の内周には、内部をくり抜いた陥没部28を形成してある。最終杭16の上端部が凹部27に嵌り込むことで、その変形を抑制できるほか、最終打撃ヘッド26の打撃位置が定まり、作業を安全に進めることができる。また陥没部28を設けることで、最終杭16の上端部が変形した後においても、最終杭16と凹部27との接触面積の増加を抑制できる。そのため最終杭16が凹部27に食い込み、双方が固着して作業を中断するといったトラブルを引き起こすことがない。   An annular recess 27 is formed on the lower surface of the final striking head 26 in order to fit the upper end portion of the final pile 16, and a recessed portion 28 is formed on the inner periphery of the recess 27. is there. By fitting the upper end portion of the final pile 16 into the concave portion 27, the deformation can be suppressed, the striking position of the final striking head 26 is determined, and the work can be proceeded safely. Further, by providing the depressed portion 28, an increase in the contact area between the final pile 16 and the recess 27 can be suppressed even after the upper end portion of the final pile 16 is deformed. Therefore, the trouble that the last pile 16 bites into the recessed part 27, both adheres, and a work is interrupted is not caused.

図4は、図3の最終杭16を埋め込む過程を縦断面で示すもので、図の左から右に向けて作業が進んでいく。まず図の一番左に描くように、二本の基本杭11を連結して、これを打撃ヘッド21で打ち込んでいく。そうすると左から二番目に描くように、最上部の連結管14が地盤G近くに到達して、その後、この連結管14の中に最終杭16を差し込む。この最終杭16は、連結管14の中を自重で落下して、最終的には直下の棒材13と接触する。次に、左から三番目に描くように、最終杭16と連結管14を溶接で一体化する。この溶接によるビード15は、連結管14の上端面に載る。   FIG. 4 shows the process of embedding the final pile 16 of FIG. 3 in a longitudinal section, and the work proceeds from the left to the right in the figure. First, as shown in the leftmost part of the figure, two basic piles 11 are connected and driven with a striking head 21. Then, as depicted second from the left, the uppermost connecting pipe 14 reaches near the ground G, and then the final pile 16 is inserted into the connecting pipe 14. The final pile 16 falls in the connecting pipe 14 by its own weight, and finally comes into contact with the bar 13 immediately below. Next, as shown in the third from the left, the final pile 16 and the connecting pipe 14 are integrated by welding. The welded bead 15 is placed on the upper end surface of the connecting pipe 14.

最終杭16の連結が完了すると、最終打撃ヘッド26をエアーハンマー31に組み込み、一番右に描くように、最終杭16を地盤Gに打ち込んでいく。その際、最終杭16の上端部は、最終打撃ヘッド26の凹部27に嵌り込み、最終杭16の変形を阻止するため、確実に打ち込みを継続できる。また陥没部28を設けたことで、最終杭16と最終打撃ヘッド26が固着することも防止できる。そして最終杭16の大半が地盤Gに埋め込まれると、基本杭11と最終杭16が一体化した長尺の杭Pが構築される。   When the connection of the final pile 16 is completed, the final striking head 26 is assembled into the air hammer 31 and the final pile 16 is driven into the ground G as depicted on the rightmost side. At that time, the upper end portion of the final pile 16 is fitted into the concave portion 27 of the final impact head 26 to prevent the final pile 16 from being deformed. Further, by providing the depressed portion 28, it is possible to prevent the final pile 16 and the final hitting head 26 from being fixed. When most of the final pile 16 is embedded in the ground G, a long pile P in which the basic pile 11 and the final pile 16 are integrated is constructed.

図5は、本発明による杭の埋め込み方法を用いて、小規模な建築物を改修する場合を示している。改修前、図中の建築物を支える基礎コンクリートは、地盤にごく浅く埋め込まれているだけで、しかもひび割れなどの劣化も進んでいる。ただし土台から上は、健全な状態を維持している。改修中は、基礎コンクリートを部分的に撤去して、そこにジャッキを挟み込み、土台を持ち上げ、床下の空間を確保する。その後、劣化した基礎コンクリートを全て撤去した上、建築物を支持するための杭Pを打ち込んでいく。   FIG. 5 shows a case where a small-scale building is refurbished using the pile embedding method according to the present invention. Prior to the renovation, the foundation concrete that supports the building in the figure was buried very shallowly in the ground, and deterioration such as cracks was also progressing. However, a healthy state is maintained from the base. During the renovation, part of the foundation concrete will be removed, a jack will be put in it, the foundation will be lifted, and the space under the floor will be secured. Then, after removing all the deteriorated foundation concrete, piles P for driving the building are driven.

杭Pは、図4に示すものと同じ構成で、二本の基本杭11の上に最終杭16を組み合わせたもので、途中の連結管14で上下の棒材13や最終杭16を一体化している。基本杭11や最終杭16は、全長が抑制されており、建築物の直下でも無理なく打ち込み作業を実施できる。そして図のように、複数の杭Pを打ち込んだ後、基礎コンクリートを新たに打設して、その上に土台を載せると、建築物の改修が終了する。   The pile P has the same configuration as that shown in FIG. 4, and the final pile 16 is combined on the two basic piles 11, and the upper and lower bars 13 and the final pile 16 are integrated by a connecting pipe 14 in the middle. ing. The basic pile 11 and the final pile 16 have a reduced overall length, and can be driven without difficulty even directly under the building. Then, as shown in the figure, after a plurality of piles P are driven, the foundation concrete is newly placed, and the foundation is placed thereon, the repair of the building is completed.

11 基本杭
12 ビード(連結管の下端面側)
13 棒材(鋼管)
14 連結管
15 ビード(連結管の上端面側)
16 最終杭
21 打撃ヘッド
22 先端面
23 シャンク
26 最終打撃ヘッド
27 凹部
28 陥没部
31 エアーハンマー
32 ハンドル
33 チャック
G 地盤
P 杭
11 Basic pile 12 Bead (Lower side of connecting pipe)
13 Bar material (steel pipe)
14 Connecting pipe 15 Bead (Upper end side of connecting pipe)
16 Final pile 21 Impact head 22 Tip surface 23 Shank 26 Final impact head 27 Recess 28 Depressed portion 31 Air hammer 32 Handle 33 Chuck G Ground P Pile

Claims (2)

鋼管などの棒材(13)と筒状の連結管(14)とを一体化した基本杭(11)と、該基本杭(11)を打ち込むための打撃ヘッド(21)と、を用い、
前記基本杭(11)は、前記棒材(13)の一端面を前記連結管(14)のほぼ中央まで差し込んだもので、
前記打撃ヘッド(21)の先端部は、前記連結管(14)の中に入り込むことのできる大きさで且つその先端面(22)は略平面状としてあり、
連結管(14)を上に向けた姿勢で前記基本杭(11)を直立させて地盤(G)に突き刺し、連結管(14)の中に前記打撃ヘッド(21)を差し込み棒材(13)を押圧し、該基本杭(11)を地盤(G)に埋め込み、
以降、埋め込まれた基本杭(11)上端の連結管(14)の中に別の基本杭(11)を差し込み、双方を溶接で一体化した後、新たに上端となった連結管(14)の中に前記打撃ヘッド(21)を差し込み棒材(13)を押圧し、一体化された複数の基本杭(11)を地盤(G)に埋没させる過程を一回または複数回行うことを特徴とする杭の埋め込み方法。
Using a basic pile (11) in which a bar (13) such as a steel pipe and a cylindrical connecting pipe (14) are integrated, and a striking head (21) for driving the basic pile (11),
The basic pile (11) is one in which one end face of the bar (13) is inserted to substantially the center of the connecting pipe (14),
The tip of the striking head (21) is sized to be able to enter the connecting pipe (14), and its tip surface (22) is substantially planar,
With the connecting pipe (14) facing upward, the basic pile (11) is erected and pierced into the ground (G). The striking head (21) is inserted into the connecting pipe (14) and the bar (13) , The basic pile (11) is embedded in the ground (G),
After that, after inserting another basic pile (11) into the connecting pipe (14) at the upper end of the embedded basic pile (11) and integrating both by welding, the connecting pipe (14) which becomes the new upper end The striking head (21) is inserted into the bar, the bar (13) is pressed, and the process of burying the integrated basic piles (11) in the ground (G) is performed once or a plurality of times. How to embed piles.
鋼管などの棒材(13)と筒状の連結管(14)とを一体化した基本杭(11)と、該基本杭(11)を打ち込むための打撃ヘッド(21)と、鋼管などの棒材だけからなる最終杭(16)と、該最終杭(16)を打ち込むための最終打撃ヘッド(26)と、を用い、
前記基本杭(11)は、前記棒材(13)の一端面を前記連結管(14)のほぼ中央まで差し込んだもので、
前記打撃ヘッド(21)の先端部は、前記連結管(14)の中に入り込むことのできる大きさで且つその先端面(22)は略平面状としてあり、
前記最終打撃ヘッド(26)の先端面には、前記最終杭(16)の上端部を嵌め込むことのできる凹部(27)を形成してあり、
連結管(14)を上に向けた姿勢で前記基本杭(11)を直立させて地盤(G)に突き刺し、連結管(14)の中に前記打撃ヘッド(21)を差し込み棒材(13)を押圧し、該基本杭(11)を地盤(G)に埋め込み、
以降、埋め込まれた基本杭(11)上端の連結管(14)の中に別の基本杭(11)を差し込み、双方を溶接で一体化した後、新たに上端となった連結管(14)の中に前記打撃ヘッド(21)を差し込み棒材(13)を押圧し、一体化された複数の基本杭(11)を地盤(G)に埋没させる過程を一回または複数回行い、
最後に、埋め込まれた基本杭(11)上端の連結管(14)の中に前記最終杭(16)を差し込み、双方を溶接で一体化した後、該最終杭(16)の上端部に前記最終打撃ヘッド(26)を嵌め込み最終杭(16)を押圧し、全体を地盤(G)に埋没させることを特徴とする杭の埋め込み方法。
A basic pile (11) in which a rod (13) such as a steel pipe and a cylindrical connecting pipe (14) are integrated, a striking head (21) for driving the basic pile (11), and a rod such as a steel pipe Using a final pile (16) made of only material and a final striking head (26) for driving the final pile (16),
The basic pile (11) is one in which one end face of the bar (13) is inserted to substantially the center of the connecting pipe (14),
The tip of the striking head (21) is sized to be able to enter the connecting pipe (14), and its tip surface (22) is substantially planar,
A concave portion (27) into which the upper end portion of the final pile (16) can be fitted is formed on the tip surface of the final impact head (26),
With the connecting pipe (14) facing upward, the basic pile (11) is erected and pierced into the ground (G). The striking head (21) is inserted into the connecting pipe (14) and the bar (13) , The basic pile (11) is embedded in the ground (G),
After that, after inserting another basic pile (11) into the connecting pipe (14) at the upper end of the embedded basic pile (11) and integrating both by welding, the connecting pipe (14) which becomes the new upper end Inserting the striking head (21) into the inside, pressing the bar (13), and performing the process of burying the integrated basic piles (11) in the ground (G) one or more times,
Finally, after inserting the final pile (16) into the connecting pipe (14) at the upper end of the embedded basic pile (11) and integrating both by welding, the upper end of the final pile (16) is A pile embedding method, wherein the final striking head (26) is fitted, the final pile (16) is pressed, and the whole is buried in the ground (G).
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