JP2009127330A

JP2009127330A - Pile head treatment apparatus

Info

Publication number: JP2009127330A
Application number: JP2007304541A
Authority: JP
Inventors: Yoshiaki Meguro; 義明目黒
Original assignee: KOKUDO KK
Current assignee: KOKUDO KK
Priority date: 2007-11-26
Filing date: 2007-11-26
Publication date: 2009-06-11

Abstract

PROBLEM TO BE SOLVED: To securely break a pile head by simply rapidly fixing an expansion device at the predetermined position inside the pile head. SOLUTION: This device 1 has a structure which supports a hydraulic cylinder 3 during operation at the vertical center part of the front 71 of a vertically long pillar structure and obtains reaction force at the upper and lower sides of the rear face 72 of the vertically long pillar structure. The support plate 8 of the hydraulic cylinder 3 is configured as a guide for inserting the device 1 inside the pile head, and an H-shaped pillar 7 is configured as a guide for locating the hydraulic cylinder 3 inside the pile head. COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、地中に打設されるコンクリート杭の特に杭頭を破壊するための杭頭処理装置に関する。 The present invention relates to a pile head processing apparatus for destroying a pile head, in particular, a concrete pile placed in the ground.

一般に、建築物や橋梁などの構造物の荷重を地盤に伝達支持する基礎として、コンクリート杭、鋼管杭など各種の杭が各種の工法により用いられている。このうち、コンクリート杭による工法の一つで、予め工場などで作られたＰＣ杭（鉄筋コンクリート杭）などを回転圧入やハンマーで打ち込む既製コンクリート杭による工法が知られている。この工法の場合、既製コンクリート杭の規格が統一されており、長さが均一であるのに対して、地表から上部の構造物を支持させる基礎地盤までの深さは必ずしも均一ではないために、同一の長さの既製コンクリート杭を一様にして打設しなければならず、基礎地盤までの深さが浅い箇所においては、杭頭が地上に残ることは避けられず、この杭頭を破壊撤去する必要がある。この場合、ＰＣ杭と上部の構造物とを一体化させるのが一般的であり、杭頭を破壊撤去する際に、杭頭のコンクリート部分のみを破壊撤去して内部に配筋された鉄筋を劣化させることなく露出させ、この鉄筋と後に構築される上部の構造物の鉄筋とを連結する必要がある。従来、この種の杭頭処理では、ブレイカーやたがねなどを用いて、内部の鉄筋を切断しないようにコンクリート部分のみを慎重に破壊して、地中に埋設された杭部分との縁を切り、ある程度破壊が終了した時点で、クレーンなどの揚重機を用いてコンクリート塊を吊るし上げて、鉄筋を残してコンクリート部分のみを撤去する方法が採られていた。ところが、この方法では、ブレイカーを使用した場合、その振動、騒音及び粉塵がすさまじく、労働環境を悪化して、作業員の健康を著しく害し、しかも杭頭のコンクリート部分のみを破壊するには相当の熟練を必要とするという問題があり、また、たがねを用いた場合は、ブレイカーなどの振動により切削する場合に生じる問題は回避できるものの、人力による作業であるために、多大な労力と時間を要し、工期の遅延を招くとともに、工費が嵩むという問題があり、いずれの場合も、その改善が待たれていた。 In general, various piles such as concrete piles and steel pipe piles are used as a foundation for transmitting and supporting loads of structures such as buildings and bridges to the ground. Among these, one of the methods using a concrete pile is known, and a method using a ready-made concrete pile in which a PC pile (reinforced concrete pile) or the like previously made in a factory or the like is driven by rotary press-fitting or a hammer is known. In the case of this construction method, the standard of ready-made concrete piles is unified and the length is uniform, but the depth from the ground surface to the foundation ground that supports the upper structure is not necessarily uniform, Precast concrete piles of the same length must be placed uniformly, and it is unavoidable that the pile heads remain on the ground in places where the depth to the foundation ground is shallow, and this pile head is destroyed. Need to be removed. In this case, it is common to integrate the PC pile and the upper structure. When the pile head is destroyed and removed, only the concrete part of the pile head is destroyed and removed, and the reinforcing bars arranged inside are used. It is necessary to expose without deteriorating and to connect this reinforcing bar to the reinforcing bar of the upper structure to be constructed later. Conventionally, this type of pile head treatment uses breakers, chisel, etc. to carefully destroy only the concrete part so as not to cut the internal rebar, and to remove the edge from the pile part buried in the ground. After cutting and breaking to some extent, a method was used in which a concrete lump was lifted using a crane or other lifting machine, and only the concrete portion was removed, leaving the reinforcing bars. However, with this method, when a breaker is used, its vibration, noise and dust are tremendous, deteriorating the working environment, significantly damaging the health of workers and destroying only the concrete part of the pile head. There is a problem that skill is required, and when using chisel, problems that occur when cutting due to vibrations such as breakers can be avoided, but since it is a work by human power, a great deal of labor and time is required. In this case, there is a problem that the construction period is delayed and the construction cost is increased.

そして、このような要請から、近年、コンクリート杭の破壊に際して、振動、騒音及び粉塵の発生を防止し、コンクリート杭の本体部分もしくは杭頭内部に配筋された鉄筋などを損傷させることなく、杭頭のコンクリート部分のみを容易に破壊することを可能とすることを目的として、油圧ジャッキを利用したコンクリート杭の破壊方法が提案された。この種の破壊方法の一例が特許文献１に記載されている。 From such a demand, in recent years, when a concrete pile is destroyed, vibration, noise and dust are prevented, and the piles are not damaged without damaging the main bars of the concrete pile or the reinforcing bars arranged inside the pile head. For the purpose of making it possible to easily destroy only the concrete part of the head, a concrete pile breaking method using a hydraulic jack was proposed. An example of this type of destruction method is described in Patent Document 1.

この文献１の破壊方法では、予め、コンクリート杭の杭頭外周に周方向に沿ってスリットを形成するとともに、杭頭内部に伸縮ジャッキを短縮した状態で、その両端部を杭頭の内面に当接させつつ懸吊し、次いで伸縮ジャッキを伸長させて、杭頭のコンクリート部分を割裂するようにした。このように伸縮ジャッキを用いることで、コンクリート杭の杭頭を簡易に破壊処理することができるとともに、破壊時の振動、騒音及び粉塵の発生を防止することができる。さらに、杭頭のコンクリート部分のみを圧壊できるので、コンクリート杭の本体部分もしくは杭頭内部に配筋された鉄筋などを損傷させることなく露出することができる。これにより、この鉄筋を上部に構築する構造体と接合して、コンクリート杭と上部の構造体とを容易に一体化することができる。 In the breaking method of this document 1, slits are formed in advance along the circumference of the pile head of the concrete pile along the circumferential direction, and both ends of the pile head are applied to the inner surface of the pile head while the telescopic jack is shortened inside the pile head. It was suspended while touching, and then the telescopic jack was extended to split the concrete part of the pile head. Thus, by using an expansion-contraction jack, the pile head of a concrete pile can be easily destroyed, and generation of vibration, noise and dust at the time of destruction can be prevented. Furthermore, since only the concrete part of a pile head can be crushed, it can expose, without damaging the main-body part of a concrete pile, or the reinforcing bar arranged inside the pile head. Thereby, this reinforcing bar can be joined with the structure constructed in the upper part, and the concrete pile and the upper structure can be easily integrated.

特開平７−２６５５７公報JP-A-7-26557

しかしながら、従来の伸縮ジャッキを利用したコンクリート杭の杭頭処理方法では、伸縮ジャッキが油圧式で、破壊を所望する部分に当接される破壊部と、破壊部を軸方向に進退する伸縮部と、この伸縮部に油圧を伝達するパイプと、コンクリート杭の直径に応じて適宜交換され、伸縮ジャッキの伸縮力をコンクリート杭内に好適に伝える伝達部とを備え、全体が水平方向に長い軸体構造に構成され、この伸縮ジャッキそれ自体をワイヤで吊るすために、コンクリート杭の杭頭処理に当たり、この伸縮ジャッキをワイヤで吊り、杭頭内部に下ろすときに、水平方向又は垂直方向に振れが生じやすく、杭頭内部に入れにくいという問題があり、また、伸縮ジャッキを杭頭内部に入れて下ろしていく過程でも、水平方向に又は垂直方向に振れが生じやすく、先端の破壊部を杭頭内部の所定の位置（圧壊位置）に位置決めしにくいという問題があり、さらに、伸縮ジャッキをコンクリート部分の所定の位置に下ろすまで作業者が終始監視して位置決めしなければならないため、伸縮ジャッキを杭頭内部に下ろす作業が簡便でなく、全体として、伸縮ジャッキを杭頭内部の所定の位置に簡便かつ迅速に固定することができないという問題がある。 However, in the pile head processing method of a concrete pile using a conventional expansion jack, the expansion jack is hydraulic, and a destruction portion that comes into contact with a portion where destruction is desired, and an expansion portion that advances and retracts the destruction portion in the axial direction, A shaft that is long in the horizontal direction and includes a pipe that transmits hydraulic pressure to the expansion and contraction part, and a transmission part that is appropriately exchanged according to the diameter of the concrete pile and that suitably transmits the expansion and contraction force of the expansion jack to the concrete pile. In order to suspend the telescopic jack itself with a wire, it is structured so that swinging occurs in the horizontal or vertical direction when the telescopic jack is suspended with a wire and lowered inside the pile head when handling the pile head of a concrete pile. There is a problem that it is easy and difficult to put inside the pile head, and even when the telescopic jack is put down inside the pile head, the horizontal or vertical runout is generated. There is a problem that it is easy to position the broken part of the tip at a predetermined position (crushing position) inside the pile head, and further, the operator monitors and positions it until the telescopic jack is lowered to the predetermined position of the concrete part. Therefore, there is a problem that the work of lowering the expansion / contraction jack into the pile head is not easy, and as a whole, the expansion / contraction jack cannot be easily and quickly fixed at a predetermined position inside the pile head.

本発明は、このような従来の課題を解決するもので、この種の伸縮装置を利用した杭頭処理装置において、伸縮装置をワイヤなどで杭頭内部に吊り下ろすときに、水平方向又は垂直方向に振れを生じにくくして、杭頭内部に入れやすくすること、また、この伸縮装置を杭頭内部に入れて下ろしていく過程でも、水平方向又は垂直方向に振れを生じにくくして、伸縮装置の動作部を杭頭内部の所定の位置（圧壊位置）に容易に位置決めすること、さらに、この伸縮装置を杭頭内部に下ろす過程を作業者が終始監視することなく、伸縮装置を所定の位置まで簡易に下ろすこと、全体として、伸縮装置を杭頭内部の所定の位置に簡便かつ迅速に固定し、杭頭を確実に破壊すること、を目的とする。 The present invention solves such a conventional problem, and in a pile head processing apparatus using this type of telescopic device, when the telescopic device is suspended inside the pile head with a wire or the like, the horizontal direction or the vertical direction Make it easier to put it inside the pile head, and even in the process of putting this telescopic device into the pile head and lowering it, making it less likely to cause horizontal or vertical shake, The operator can easily position the moving part at a predetermined position (crush position) inside the pile head, and the operator can monitor the expansion device at a predetermined position without monitoring the process of lowering the expansion device inside the pile head. The purpose of this is to simply and quickly fix the expansion and contraction device to a predetermined position inside the pile head and to reliably destroy the pile head.

上記の問題を解決するために、本発明の杭頭処理装置は、伸縮装置と、前記伸縮装置の伸縮方向一端側に前記伸縮装置の伸縮動作により進退可能に設けられ、コンクリートを圧壊するための動作部、及び前記伸縮装置の伸縮方向他端側に固定され、反力を得るための反力部とを備え、前記伸縮装置を懸吊手段によりコンクリート杭の杭頭内部に吊り下ろし、前記杭頭内部で前記伸縮装置を伸長させて前記杭頭を破壊する形式の杭頭処理装置において、前記伸縮装置を支持し、前記懸吊手段に吊るすための本体サポートユニットを備え、前記本体サポートユニットは、前記杭頭内部に配置可能な上下方向に長い柱状部材と、前記柱状部材に水平方向に向けて突設され、前記杭頭内部に配置可能な平面形状を有する支持部材と、前記支持部材又は前記柱状部材に形成され、前記懸吊手段に係止可能な吊り部材とを有し、前記伸縮装置は前記支持部材上に、前記伸縮装置の伸縮方向他端側を前記柱状部材に固定されて、水平方向に向けて伸縮可能に据え付けられ、前記柱状部材の前記伸縮装置の伸長方向とは逆向きの面に、前記反力部が前記伸縮装置に対して上下に分割して形成される、ことを要旨とする。 In order to solve the above problems, the pile head processing apparatus of the present invention is provided with an expansion / contraction device and an expansion / contraction operation of the expansion / contraction device on one end side in the expansion / contraction direction of the expansion / contraction device. An operating part and a reaction force part fixed to the other end in the direction of expansion and contraction of the expansion and contraction device to obtain a reaction force, and the expansion and contraction unit is suspended inside a pile head of a concrete pile by a suspension means, In a pile head processing apparatus of the type that breaks the pile head by extending the expansion device inside the head, the main body support unit includes a main body support unit for supporting the expansion device and hanging on the suspension means. A columnar member that is long in the vertical direction that can be arranged inside the pile head, a support member that protrudes in the horizontal direction on the columnar member and has a planar shape that can be arranged inside the pile head, and the support member or And a suspension member that can be locked to the suspension means, and the telescopic device is fixed on the support member with the other end in the telescopic direction of the telescopic device fixed to the columnar member. The reaction force portion is vertically divided with respect to the expansion and contraction device on the surface opposite to the extension direction of the expansion and contraction device of the columnar member, which is installed to extend and contract in the horizontal direction. This is the gist.

この場合、柱状部材又は支持部材又はその両方は各部材の全部又は一部に杭頭内部の内周に対応する形状を有し、装置全体を杭頭内部に挿入するためのガイドとして構成される。さらに、柱状部材は杭頭の長さに関連付ける所定の長さを有し、前記柱状部材の特定部位の前記杭頭内部に対する相対位置により、伸縮装置を杭頭内部に位置決めするガイドとして構成される。また、動作部は断面略Ｉ形のレール形状に形成される。 In this case, the columnar member and / or the support member have a shape corresponding to the inner circumference inside the pile head in all or a part of each member, and are configured as a guide for inserting the entire apparatus into the pile head. . Further, the columnar member has a predetermined length related to the length of the pile head, and is configured as a guide for positioning the expansion / contraction device inside the pile head by a relative position of the specific part of the columnar member with respect to the inside of the pile head. . Further, the operating part is formed in a rail shape having a substantially I-shaped cross section.

本発明の杭頭処理装置は、上記のとおり、伸縮装置を柱体構造の本体サポートユニットにより支持し、懸吊手段に吊るして、杭頭内部に吊り下ろすので、伸縮装置それ自体をワイヤなどで杭頭内部に吊り下ろす場合に比べて、装置（杭頭処理装置）を水平方向又は垂直方向に振れを生じにくくして、杭頭内部に入れやすくすることができ、また、この装置（杭頭処理装置）を杭頭内部に入れて下ろしていく過程でも、水平方向又は垂直方向に振れを生じにくくして、伸縮装置の動作部を杭頭内部の所定の位置（圧壊位置）に容易に位置決めすることができる。この場合、柱状部材又は支持部材又はその両方を、上記のとおり、杭頭内部に挿入するためのガイドとして構成することで、この装置（杭頭処理装置）を杭頭内部にさらに入れやすく、さらに位置決めし易くすることができる。また、柱状部材を、上記のとおり、伸縮装置を杭頭内部に位置決めするガイドとして構成することにより、この装置（杭頭処理装置）を杭頭内部に下ろす過程を作業者が終始監視することなく、伸縮装置を所定の位置まで簡易に下ろすことができる。したがって、全体として、伸縮装置を杭頭内部の所定の位置に簡便かつ迅速に固定することができ、杭頭を確実に破壊することができる。 As described above, the pile head processing apparatus of the present invention supports the expansion and contraction device by the columnar structure main body support unit, hangs it on the suspension means, and hangs it inside the pile head. Compared to the case of hanging inside the pile head, the device (pile head treatment device) can be made less likely to shake horizontally or vertically, making it easier to put inside the pile head. Even during the process of placing the processing device inside the pile head, the horizontal or vertical vibration is less likely to occur, and the operating part of the telescopic device can be easily positioned at a predetermined position (crush position) inside the pile head. can do. In this case, by configuring the columnar member or the support member or both as a guide for insertion into the pile head as described above, this device (pile head processing device) can be further easily placed inside the pile head. Positioning can be facilitated. In addition, as described above, the columnar member is configured as a guide for positioning the telescopic device inside the pile head, so that the operator can monitor the process of lowering the device (pile head processing device) inside the pile head throughout. The telescopic device can be easily lowered to a predetermined position. Therefore, as a whole, the telescopic device can be easily and quickly fixed at a predetermined position inside the pile head, and the pile head can be reliably destroyed.

この発明の一実施の形態について、図１乃至図４を用いて説明する。図１に示すように、杭頭処理装置１（以下、単に装置１という。）は、伸縮装置３を含む本体２と、この本体２を支持し、クレーンなどの懸吊手段に吊るすための本体サポートユニット６とを備えて構成される。 An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a pile head processing device 1 (hereinafter simply referred to as device 1) includes a main body 2 including a telescopic device 3, and a main body for supporting the main body 2 and hanging it on a suspension means such as a crane. And a support unit 6.

本体２は、伸縮装置３と、動作部４と、反力部５と、を備える。これらの各部を図２乃至図４に具体的に示している。 The main body 2 includes a telescopic device 3, an operation unit 4, and a reaction force unit 5. Each of these parts is specifically shown in FIGS.

伸縮装置３は、軸を流体圧又は電動により水平方向に往復直線運動するアクチュエータで、この実施の形態では、油圧シリンダが採用される。なお、以下の説明でこの伸縮装置３を油圧シリンダ３という。 The telescopic device 3 is an actuator that reciprocates linearly in the horizontal direction by fluid pressure or electric drive. In this embodiment, a hydraulic cylinder is employed. In the following description, the telescopic device 3 is referred to as a hydraulic cylinder 3.

動作部４は、油圧シリンダ３の伸縮方向一端側に油圧シリンダ３の伸縮動作により進退可能に設けられて、杭頭内部のコンクリートを圧壊する機能部で、丸棒、角棒など棒形のもの、棒形のものよりも体積の大きいブロック状のもの、先端が曲面のもの又は平面のもの、あるいは尖ったもの又は鋭利なもの、（コンクリート杭との）接触面積が大きいもの又は小さいものなど、コンクリート杭の破壊に適切な形状に形成されて、油圧シリンダ３の作動ロッド３１の先端に設けられる。この実施の形態では、動作部４は、断面Ｉ形の短いレール形状に形成され、油圧シリンダ３の作動ロッド３１の先端に一体的に取り付けられる。この場合、動作部４は作動ロッド３１に固定されていてもよく、また作動ロッド３１に着脱可能に取り付けられて、各種形状の動作部と取り替え可能な形式にしてもよい。なお、動作部４を取り替え形式にした場合、動作部４は丸棒、角棒など棒形のもの、棒形のものよりも体積の大きいブロック状のもの、先端が曲面又は平面のもの、あるいは尖ったもの又は鋭利なもの、（コンクリート杭との）接触面積が大きいもの又は小さいものなど、コンクリート杭の破壊に適切な形状のものが用意され、この中から適宜選定される。なお、以下の説明で、この動作部４をレール形状ブロック４という。 The operation unit 4 is a functional unit that is provided on one end side of the hydraulic cylinder 3 in the expansion / contraction direction so that the hydraulic cylinder 3 can move forward / backward, and crushes the concrete inside the pile head. Blocks with a larger volume than rod-shaped ones, curved or flat tips, sharp or sharp ones, large or small contact areas (with concrete piles), etc. It is formed in a shape suitable for the destruction of the concrete pile and is provided at the tip of the operating rod 31 of the hydraulic cylinder 3. In this embodiment, the operating portion 4 is formed in a short rail shape having an I-shaped cross section, and is integrally attached to the tip of the operating rod 31 of the hydraulic cylinder 3. In this case, the operation unit 4 may be fixed to the operation rod 31 or may be detachably attached to the operation rod 31 so that the operation unit 4 can be replaced with various types of operation units. When the operation unit 4 is replaced, the operation unit 4 is a rod, such as a round bar or a square bar, a block having a larger volume than the rod, a tip having a curved surface or a plane, or A thing with a shape suitable for destruction of a concrete pile, such as a sharp thing or a sharp thing, a thing with a large contact area (with a concrete pile), or a small thing is prepared, and it chooses from these suitably. In the following description, the operation unit 4 is referred to as a rail-shaped block 4.

反力部５は油圧シリンダ３の伸縮方向他端側に固定され、油圧シリンダ３の動作時に反力を得る機能部で、反力を受けるのに適切な面形状に形成されて、油圧シリンダ３の後端側に設置される。この実施の形態では、反力部５は、矩形の平板状に形成され、後述する本体サポートユニット６の柱状部材７の背面７２の上端部及び下端部に固着される。なお、以下の説明で、この反力部５を反力プレート５という。 The reaction force portion 5 is fixed to the other end in the expansion / contraction direction of the hydraulic cylinder 3 and is a functional portion that obtains a reaction force when the hydraulic cylinder 3 is operated. The reaction force portion 5 is formed in a surface shape suitable for receiving the reaction force. It is installed on the rear end side. In this embodiment, the reaction force portion 5 is formed in a rectangular flat plate shape, and is fixed to the upper end portion and the lower end portion of the back surface 72 of the columnar member 7 of the main body support unit 6 described later. In the following description, the reaction force portion 5 is referred to as a reaction force plate 5.

本体サポートユニット６は、柱状部材７と、支持部材８と、吊り部材９、とを備える。これらの各部を図２乃至図４に具体的に示している。 The main body support unit 6 includes a columnar member 7, a support member 8, and a suspension member 9. Each of these parts is specifically shown in FIGS.

柱状部材７は、金属その他の所定の重量を有する材料により、杭頭内部に配置可能に、水平方向の寸法を杭頭内部の内径よりも小さい所定の寸法で、上下方向の寸法を杭頭の長さと略同じか又はそれよりも小さい所定の寸法の、柱形状に形成される。この場合、柱形状は、角柱、円柱、（断面）Ｈ型柱などが好ましい。また、この柱状部材７は、杭頭の長さに関連付ける所定の長さを有し、柱状部材７の特定部位の杭頭内部に対する相対位置により、油圧シリンダ３を杭頭内部に挿入し、位置決めするためのガイドとして構成される。この柱状部材７はまた、外周の全部又は一部に杭頭内部の内周に対応する形状が形成されることで、装置１を杭頭内部に挿入するためのガイドとして構成することもできる。この実施の形態では、柱状部材７は、杭頭内部に配置可能に、上記の所定の寸法及び重量に適合するＨ型鋼により形成される。この場合、Ｈ型鋼の中間の板７０２を挟んで両側の板７０１、７０３のうち、片側一方の板７０１の外側面（外側向きの面）を正面７１とし、他方の板７０３の外側面（外側向きの面）を背面７２とする。そして、この柱状部材７の正面７１を油圧シリンダ３の基端部を固定する支持面とし、この正面７１に、油圧シリンダ３の基端部側を両側から挟持可能な一対の突状７１１、７１１が形成されて、これが油圧シリンダ３の振れ止めとなる。また、この柱状部材７の背面７２を油圧シリンダ３の伸長方向と逆向きの面とし、この背面７２に、反力プレート５が既述のとおり固着され、この柱状部材７（の上下方向中央）に支持される油圧シリンダ３に対して上下に分割して取り付けられる。また、この柱状部材７の場合、柱状部材７の全長を杭頭の長さと略同じにして杭頭の長さに関連付け、この柱状部材７の上端部の杭頭内部に対する相対位置により、この柱状部材７に支持される油圧シリンダ３を杭頭内部で位置決めする。この場合、例えば、柱状部材７を垂直に杭頭内部に挿入し、柱状部材７の上端部と杭頭の上端部を一致させることにより、この柱状部材７に支持される油圧シリンダ３の杭頭内部における高さ位置を特定することができ、これを基準にすることにより、柱状部材７を下方に下げる場合は、杭頭の上端部から柱状部材７の上端部までの距離から、油圧シリンダ３の位置を所定の高さ位置に位置決めすることができ、反対に柱状部材７を上げる場合、同様に、杭頭の上端部から柱状部材７の上端部までの距離から、油圧シリンダ３の位置を所定の高さ位置に位置決めすることができ、装置１を杭頭内部の所望の高さ位置に簡易に位置決めすることができる。また、この柱状部材７の場合、柱状部材７の周囲に杭頭内部の内周に対応する形状、この場合、後述する支持部材８と同じ又は類似の小判形のプレートが後述する支持部材８と同じ取り付け方で取り付けられることにより、この柱状部材７を、装置１を杭頭内部に挿入するためのガイドとして構成することもできる。なお、以下の説明で、この柱状部材７をＨ型柱７という。 The columnar member 7 can be placed inside the pile head with a metal or other material having a predetermined weight, the horizontal dimension is a predetermined dimension smaller than the inner diameter of the pile head, and the vertical dimension is the height of the pile head. It is formed in a column shape having a predetermined dimension substantially the same as or smaller than the length. In this case, the column shape is preferably a prism, a cylinder, a (cross-section) H-shaped column, or the like. Further, the columnar member 7 has a predetermined length related to the length of the pile head, and the hydraulic cylinder 3 is inserted into the pile head according to the relative position of the specific part of the columnar member 7 with respect to the inside of the pile head. It is configured as a guide. The columnar member 7 can also be configured as a guide for inserting the device 1 into the pile head by forming a shape corresponding to the inner circumference inside the pile head on all or part of the outer circumference. In this embodiment, the columnar member 7 is formed of an H-shaped steel that conforms to the above-described predetermined dimensions and weight so as to be disposed inside the pile head. In this case, of the plates 701 and 703 on both sides of the intermediate plate 702 of the H-shaped steel, the outer surface (outward facing surface) of one plate 701 on one side is the front surface 71 and the outer surface (outer surface) of the other plate 703 is placed. The facing surface) is referred to as the back surface 72. The front surface 71 of the columnar member 7 is used as a support surface for fixing the proximal end portion of the hydraulic cylinder 3, and a pair of protrusions 711 and 711 that can sandwich the proximal end portion side of the hydraulic cylinder 3 from both sides on the front surface 71. Is formed, and this serves as a steady stop for the hydraulic cylinder 3. Further, the back surface 72 of the columnar member 7 is a surface opposite to the extending direction of the hydraulic cylinder 3, and the reaction force plate 5 is fixed to the back surface 72 as described above, and the columnar member 7 (the center in the vertical direction). Are attached to the hydraulic cylinder 3 supported by the upper and lower parts. In the case of this columnar member 7, the entire length of the columnar member 7 is made substantially the same as the length of the pile head, and is associated with the length of the pile head. The hydraulic cylinder 3 supported by the member 7 is positioned inside the pile head. In this case, for example, the columnar member 7 is inserted vertically into the pile head, and the upper end of the columnar member 7 and the upper end of the pile head are made to coincide with each other, thereby the pile head of the hydraulic cylinder 3 supported by the columnar member 7. The height position in the interior can be specified, and using this as a reference, when lowering the columnar member 7 downward, the hydraulic cylinder 3 is determined from the distance from the upper end of the pile head to the upper end of the columnar member 7. When the columnar member 7 is raised, the position of the hydraulic cylinder 3 is similarly determined from the distance from the upper end of the pile head to the upper end of the columnar member 7. It can be positioned at a predetermined height position, and the device 1 can be easily positioned at a desired height position inside the pile head. Moreover, in the case of this columnar member 7, the shape corresponding to the inner periphery inside a pile head around the columnar member 7, in this case, the same or similar oval plate as the later-described support member 8 and the later-described support member 8 By attaching by the same attachment method, this columnar member 7 can also be comprised as a guide for inserting the apparatus 1 in a pile head inside. In the following description, this columnar member 7 is referred to as an H-shaped column 7.

支持部材８は、金属その他の剛性を有する板材により、杭頭内部に配置可能な平面形状に形成される。この場合、支持部材７は、外形の全部又は一部に杭頭内部に対応する形状を有し、装置１全体を杭頭内部に挿入するためのガイドとして構成される。この実施の形態では、支持部材８は、杭頭内部に嵌合可能な略小判形の平面形状に、かつ両端縁部（この場合、前後の縁部）が杭頭内部の内周形状に対応する円弧形状８１に形成され、後縁部の中央にＨ型柱７が挿通可能な矩形の凹部８２が形成される。このようにして支持部材８の前部に油圧シリンダ３を設置するための平面形状の支持面が形成され、後部にこの支持部材８をＨ型柱７に取り付けるための凹部８２が形成される。また、この支持部材８は外形の一部に杭頭内部の内周に対応する円弧形状８１が形成されたことで、支持部材８は装置１を杭頭内部に挿入するためのガイドとして構成される。そして、この支持部材８は、後部の凹部８２にＨ型柱７を通して、このＨ型柱７の上下方向中央にＨ型柱７に対して直角に溶接その他の固着手段により取り付けられて、Ｈ型柱７の正面７１から水平に突設される。なお、以下の説明で、この支持部材８を支持プレート８という。 The support member 8 is formed in a planar shape that can be disposed inside the pile head by a metal or other plate having rigidity. In this case, the support member 7 has a shape corresponding to the inside of the pile head in all or part of the outer shape, and is configured as a guide for inserting the entire device 1 into the inside of the pile head. In this embodiment, the support member 8 has a substantially oval planar shape that can be fitted inside the pile head, and both edge portions (in this case, front and rear edges) correspond to the inner circumferential shape inside the pile head. A rectangular concave portion 82 into which the H-shaped column 7 can be inserted is formed at the center of the rear edge portion. In this manner, a planar support surface for installing the hydraulic cylinder 3 is formed at the front portion of the support member 8, and a recess 82 for attaching the support member 8 to the H-shaped column 7 is formed at the rear portion. In addition, the support member 8 is configured as a guide for inserting the device 1 into the pile head by forming an arc shape 81 corresponding to the inner circumference inside the pile head in a part of the outer shape. The The support member 8 is attached to the rear concave portion 82 through the H-shaped column 7 and is attached to the center of the H-shaped column 7 in the vertical direction by welding or other fixing means at right angles to the H-shaped column 7. It protrudes horizontally from the front surface 71 of the column 7. In the following description, the support member 8 is referred to as a support plate 8.

吊り部材９は、装置１全体がクレーンなどの懸吊手段に吊り下げ可能に、支持プレート８又はＨ型柱７に略逆Ｕ字形又はこれに類似の形状に形成される。この場合、支持プレート８の両側に一対の吊りプレート９１、９１が立ち上げ形成され、これら吊りプレート９１、９１の上端部間に吊り金具９２が架設されて構成される。この実施の形態では、一対の吊りプレート９１、９１は、Ｈ型柱７の長さの半分程度の長さを有する細長い平板で、支持プレート８の左右両側の中央に上方に向けて直角に溶接その他の固着手段により固着され、支持プレート８の両側に立ち上げ固定される。吊り金具９２は丸棒材など棒状の鋼材を三角形状に曲げて形成され、一対の吊りプレート９１、９１の上端部間に架け渡されて、溶接その他の固着手段により固着される。なお、この吊り部材９は支持プレート８に代えて、Ｈ型柱７に取り付けられてもよい。また、このような吊り部材９に代えて、Ｈ型柱７の両側上部にそれぞれブラケットが固着されて、これらのブラケット間に吊り金具９２が取り付けられてもよく、さらに、Ｈ型柱７の両側上部に吊り金具９２が直接固着されてもよい。なお、以下の説明で、この吊り部材９を吊り部９という。 The suspension member 9 is formed in a substantially inverted U shape or a similar shape to the support plate 8 or the H-shaped column 7 so that the entire apparatus 1 can be suspended by suspension means such as a crane. In this case, a pair of suspension plates 91, 91 are raised and formed on both sides of the support plate 8, and a suspension fitting 92 is constructed between the upper ends of the suspension plates 91, 91. In this embodiment, the pair of suspension plates 91, 91 are elongated flat plates having a length that is about half of the length of the H-shaped column 7, and are welded at right angles toward the center on the left and right sides of the support plate 8. It is fixed by other fixing means, and is raised and fixed on both sides of the support plate 8. The hanging metal fitting 92 is formed by bending a rod-shaped steel material such as a round bar material into a triangular shape, is spanned between the upper ends of the pair of suspension plates 91, 91, and is fixed by welding or other fixing means. The suspension member 9 may be attached to the H-shaped column 7 instead of the support plate 8. Further, instead of such a suspension member 9, brackets may be fixed to the upper portions on both sides of the H-shaped column 7, and a hanging metal fitting 92 may be attached between these brackets. The hanging metal fitting 92 may be directly fixed to the upper part. In the following description, the suspension member 9 is referred to as a suspension portion 9.

本体サポートユニット６はこのような構成を有し、この本体サポートユニット６に本体２が一体的に取り付けられる。この本体サポートユニット６の場合、油圧シリンダ３がレール形状ブロック４を前方に向けて支持プレート８の支持面上に平行に、かつ油圧シリンダ３の基端部がＨ型柱７の正面７１に支持固定されるとともに正面７１の一対の突状７１１、７１１間に挟持（振れ止め）されて設置され、油圧シリンダ３と支持プレート８が固着手段を介して取り付けられる。そして、反力プレート８が、既述のとおり、Ｈ型柱７の背面７２に油圧シリンダ３に対して上下に分割して取り付けられる。このようにして装置１は、上下に長い柱体構造の正面７１の上下方向中央で動作時の油圧シリンダ３を支持し、上下に長い柱体構造の背面７２の上下で反力を得る構造を採るとともに、支持プレート８を、装置１全体を杭頭内部に挿入するためのガイドとして、Ｈ型柱７を、油圧シリンダ３を杭頭内部に位置決めするガイドとしてそれぞれ構成する。 The main body support unit 6 has such a configuration, and the main body 2 is integrally attached to the main body support unit 6. In the case of the main body support unit 6, the hydraulic cylinder 3 is parallel to the support surface of the support plate 8 with the rail-shaped block 4 facing forward, and the base end portion of the hydraulic cylinder 3 is supported by the front surface 71 of the H-shaped column 7. The hydraulic cylinder 3 and the support plate 8 are attached via fixing means while being fixed and sandwiched (stabilized) between the pair of protrusions 711 and 711 on the front surface 71. And the reaction force plate 8 is divided | segmented up and down with respect to the hydraulic cylinder 3 to the back surface 72 of the H-type column 7 as above-mentioned. In this way, the device 1 has a structure that supports the hydraulic cylinder 3 during operation at the center in the vertical direction of the front surface 71 of the columnar structure that is vertically long and obtains a reaction force above and below the back surface 72 of the columnar structure that is vertically long. In addition, the support plate 8 is configured as a guide for inserting the entire apparatus 1 into the pile head, and the H-shaped column 7 is configured as a guide for positioning the hydraulic cylinder 3 inside the pile head.

図５乃至図８にこの装置１による、コンクリート杭Ｃの杭頭Ｃ１の破壊処理を示している。なお、コンクリート杭ＣはＰＣ杭で、コンクリート内部に鉄筋が配筋されている。まず、この装置１を杭頭Ｃ１内部に挿入し、設置する。この場合、図５に示すように、まず、本体サポートユニット６に設けた吊り金具９２にクレーンなどのフックを係止して、クレーンの昇降動作により、装置１を杭頭Ｃ１の上方に吊り上げる。なお、このとき、油圧シリンダ３は作動ロッド３１が収縮した状態になっている。続いて、クレーンの昇降動作により、装置１を杭頭Ｃ１内部に向けて吊り下ろす。このとき、この装置１の上下に長い柱体構造により、装置１は水平方向又は垂直方向に振れ難く、また杭頭Ｃ１内部に向けて入れやすく、装置１のＨ型柱７を下端から杭頭Ｃ１内部に円滑かつ迅速に挿入することができる。続いて、このＨ型柱７を杭頭Ｃ１内部に入れて下ろしていく過程でも、この装置１の上下に長い柱体構造により、装置１は水平方向又は垂直方向に振れが生じにくく、Ｈ型柱７を円滑かつ迅速に入れていくことができる。続いて、Ｈ型柱７中間の油圧シリンダ３の支持プレート８を杭頭Ｃ１内部に挿入する。このとき、図６に示すように、支持プレート８の外形の一部に杭頭Ｃ１内部の内周に対応する円弧形状８１が形成されているので、これをガイドにして、支持プレート８を杭頭Ｃ１内部に円滑かつ迅速に挿入することができ、また、装置１全体を適切な姿勢（油圧シリンダ３を水平な状態）に維持することができる。さらに、この装置１の場合、Ｈ型柱７の全長を杭頭Ｃ１の長さと略同じにして杭頭Ｃ１の長さに関連付けているので、このＨ型柱７の上端部の杭頭Ｃ１内部に対する相対位置により、油圧シリンダ３を杭頭Ｃ１内部の所定の位置に簡易に位置決めすることができる。したがって、装置１を下ろす過程を作業者が終始監視することなく、油圧シリンダ３のレール形状ブロック４を所定の位置（圧壊位置）まで簡易に下ろすことができる。このようにして装置１を杭頭Ｃ１内部に挿入し、図７に示すように、油圧シリンダ３のレール形状ブロック４を杭頭１内部の所定の位置に位置決めする。そして、ここで油圧シリンダ３を作動させ、図８に示すように、レール形状ブロック４を進退駆動する。このとき、Ｈ型柱７の背面７２上下の各反力プレート５、５は杭頭Ｃ１内部の壁面に当接された状態で、油圧シリンダ３のレール形状ブロック４が杭頭Ｃ１内部の所定の位置のコンクリートの壁面を押圧する。この場合、油圧シリンダ３の動作によるコンクリートの壁面を押す力は、当該壁面とは反対側の壁面に、Ｈ型柱７の背面７２上下の各反力プレート５、５によって上下に分散して伝達され、反対側の壁面は破壊されることなく保持される。そして、これらの反力プレート５、５で得られた反力によって、油圧シリンダ３のレール形状ブロック４が杭頭Ｃ１内部の所定の位置を一定の力で押圧し、コンクリートの壁面を圧壊する。このようにして杭頭内部の当該壁面を圧壊したら、この装置１を杭頭Ｃ１内部で上下方向又は回転方向に移動することによって杭頭Ｃ１内部の圧壊位置を変え、油圧シリンダ３を同様に駆動して、杭頭Ｃ１内部の壁面を同様に圧壊し、これを繰り返し行なって、杭頭Ｃ１を破壊する。 FIG. 5 to FIG. 8 show the destruction treatment of the pile head C1 of the concrete pile C by this apparatus 1. In addition, the concrete pile C is a PC pile, and the reinforcing bar is arranged inside the concrete. First, this apparatus 1 is inserted into the pile head C1 and installed. In this case, as shown in FIG. 5, first, a hook such as a crane is locked to the suspension fitting 92 provided on the main body support unit 6, and the device 1 is lifted above the pile head C 1 by the lifting and lowering operation of the crane. At this time, the hydraulic cylinder 3 is in a state where the operating rod 31 is contracted. Subsequently, the device 1 is suspended toward the inside of the pile head C1 by the lifting and lowering operation of the crane. At this time, due to the long column structure at the top and bottom of the device 1, the device 1 is not easily shaken in the horizontal direction or the vertical direction, and can be easily inserted into the pile head C1. It can be smoothly and quickly inserted into C1. Subsequently, even in the process of putting this H-shaped column 7 into the pile head C1 and lowering it, the apparatus 1 is less likely to be shaken in the horizontal direction or the vertical direction due to the long column structure at the top and bottom of the apparatus 1. The column 7 can be inserted smoothly and quickly. Subsequently, the support plate 8 of the hydraulic cylinder 3 in the middle of the H-shaped column 7 is inserted into the pile head C1. At this time, as shown in FIG. 6, since an arc shape 81 corresponding to the inner periphery of the pile head C1 is formed in a part of the outer shape of the support plate 8, this is used as a guide and the support plate 8 is attached to the pile. The head C1 can be inserted smoothly and quickly, and the entire apparatus 1 can be maintained in an appropriate posture (the hydraulic cylinder 3 is in a horizontal state). Furthermore, in the case of this apparatus 1, since the entire length of the H-shaped column 7 is made substantially the same as the length of the pile head C1 and is associated with the length of the pile head C1, the inside of the pile head C1 at the upper end of the H-shaped column 7 Therefore, the hydraulic cylinder 3 can be easily positioned at a predetermined position inside the pile head C1. Therefore, the operator can easily lower the rail-shaped block 4 of the hydraulic cylinder 3 to a predetermined position (crush position) without monitoring the process of lowering the device 1 throughout. In this way, the device 1 is inserted into the pile head C1, and the rail-shaped block 4 of the hydraulic cylinder 3 is positioned at a predetermined position inside the pile head 1 as shown in FIG. Then, the hydraulic cylinder 3 is operated here to drive the rail-shaped block 4 forward and backward as shown in FIG. At this time, the reaction force plates 5 and 5 above and below the back surface 72 of the H-shaped column 7 are in contact with the wall surface inside the pile head C1, and the rail-shaped block 4 of the hydraulic cylinder 3 is fixed to the predetermined inside the pile head C1. Press the concrete wall at the position. In this case, the force that pushes the wall surface of the concrete due to the operation of the hydraulic cylinder 3 is transmitted to the wall surface on the opposite side of the wall surface by being dispersed vertically by the reaction force plates 5 and 5 above and below the rear surface 72 of the H-shaped column 7. The opposite wall surface is held without being destroyed. And by the reaction force obtained by these reaction force plates 5 and 5, the rail-shaped block 4 of the hydraulic cylinder 3 presses a predetermined position inside the pile head C1 with a constant force, and the concrete wall surface is crushed. When the wall surface inside the pile head is crushed in this way, the crushing position inside the pile head C1 is changed by moving the device 1 in the vertical direction or the rotational direction inside the pile head C1, and the hydraulic cylinder 3 is similarly driven. Then, the wall surface inside the pile head C1 is similarly crushed, and this is repeated to destroy the pile head C1.

以上説明したように、この装置１では、油圧シリンダ３を柱体構造の本体サポートユニット６に支持し、懸吊手段に吊るして、杭頭Ｃ１内部に吊り下ろすので、油圧シリンダ３それ自体をワイヤなどで杭頭Ｃ１内部に吊り下ろす場合に比べて、装置１に水平方向又は垂直方向の振れを生じにくくして、杭頭Ｃ１内部に入れやすくすることができ、また、この装置１を杭頭Ｃ１内部に入れて下ろしていく過程でも、水平方向又は垂直方向に振れを生じにくくして、油圧シリンダ３のレール形状ブロック４を杭頭Ｃ１内部の所定の位置（圧壊位置）に容易に位置決めすることができる。そして、この装置１の場合、Ｈ型柱７又は支持プレート８又はその両方７、８を、既述のとおり、杭頭Ｃ１内部に挿入するためのガイドとして構成することで、この装置１を杭頭Ｃ１内部にさらに入れやすく、さらに位置決めし易くすることができる。また、Ｈ型柱７を、上記のとおり、油圧シリンダ３を杭頭Ｃ１内部に位置決めするガイドとして構成することで、この装置１を杭頭Ｃ１内部に下ろす過程を作業者が終始監視することなく、油圧シリンダ３を所定の位置まで簡易に下ろすことができる。したがって、全体として、油圧シリンダ３を杭頭Ｃ１内部の所定の位置に簡便かつ迅速に固定することができ、杭頭Ｃ１を確実に破壊することができる。 As described above, in this apparatus 1, the hydraulic cylinder 3 is supported by the columnar body support unit 6, is suspended by the suspension means, and is suspended inside the pile head C 1. Compared with the case where the apparatus 1 is suspended inside the pile head C1, it is possible to make the apparatus 1 less likely to be shaken in the horizontal direction or the vertical direction so that the apparatus 1 can be easily placed inside the pile head C1. Even in the process of entering and lowering the inside of C1, the rail-shaped block 4 of the hydraulic cylinder 3 is easily positioned at a predetermined position (crushing position) inside the pile head C1 by making it difficult for vibration to occur in the horizontal direction or the vertical direction. be able to. And in the case of this apparatus 1, by configuring the H column 7 or the support plate 8 or both 7, 8 as a guide for inserting into the pile head C1 as described above, this apparatus 1 is piled. It is easier to put in the head C1 and positioning can be further facilitated. Further, as described above, the H-shaped column 7 is configured as a guide for positioning the hydraulic cylinder 3 inside the pile head C1, so that an operator does not monitor the process of lowering the device 1 inside the pile head C1. The hydraulic cylinder 3 can be easily lowered to a predetermined position. Therefore, as a whole, the hydraulic cylinder 3 can be easily and quickly fixed at a predetermined position inside the pile head C1, and the pile head C1 can be reliably destroyed.

なお、上記実施の形態では、油圧シリンダ３の基端部をＨ型柱７の正面７１で支持固定したが、Ｈ型柱７の正面７１又はその他の周面に固定プレートを固着して支持プレート８上に突出させ、この固定プレートで油圧シリンダ３（の基端部側）を支持固定するようにしてもよい。この場合、固定プレートに油圧シリンダ３の振れ止めを備えることが好ましい。 In the above embodiment, the base end portion of the hydraulic cylinder 3 is supported and fixed by the front surface 71 of the H-shaped column 7. However, a fixed plate is fixed to the front surface 71 of the H-shaped column 7 or other peripheral surface. The hydraulic cylinder 3 (the base end side) may be supported and fixed by the fixing plate. In this case, it is preferable to provide the stationary plate with a steady stop for the hydraulic cylinder 3.

また、上記実施の形態では、支持プレート８をＨ型柱７に固着したが、この支持プレート８をＨ型柱７に着脱可能に取り付け、支持プレート８の取り付け位置をＨ型柱７の上下方向又は左右方向に変更可能にしてもよい。さらに、Ｈ型柱７にレールを設け、支持プレート８に当該レールを移動可能なガイドを設け、油圧シリンダやモータ駆動のボールねじ機構を利用した駆動装置により、支持プレート８をＨ型柱７上で移動可能に構成してもよい。 In the above embodiment, the support plate 8 is fixed to the H-shaped column 7. The support plate 8 is detachably mounted on the H-shaped column 7, and the mounting position of the support plate 8 is set in the vertical direction of the H-shaped column 7. Or you may make it changeable in the left-right direction. Further, a rail is provided on the H-shaped column 7, a guide capable of moving the rail is provided on the support plate 8, and the support plate 8 is mounted on the H-shaped column 7 by a driving device using a hydraulic cylinder or a motor-driven ball screw mechanism. It may be configured to be movable.

本発明の一実施の形態における杭頭処理装置の全体斜視図The whole perspective view of the pile head processing device in one embodiment of the present invention 同装置の平面図Plan view of the device 同装置の側面図Side view of the device 同装置の正面図Front view of the device 同装置のＨ型柱を杭頭内部に挿入する状態を示す斜視図The perspective view which shows the state which inserts the H-shaped pillar of the same apparatus into a pile head inside 同装置の支持プレートを杭頭内部に挿入する状態を示す斜視図The perspective view which shows the state which inserts the support plate of the apparatus into a pile head inside 同装置を杭頭内部に設置した状態を示す側面断面図Side sectional view showing the same device installed inside the pile head 同装置を杭頭内部に設置して、杭頭を破壊する状態を示す側面断面図Side cross-sectional view showing the state in which the device is installed inside the pile head and the pile head is destroyed

Explanation of symbols

１杭頭処理装置
２本体
３伸縮装置（油圧シリンダ）
３１作動ロッド
４動作部（レール形状ブロック）
５反力部（反力プレート）
６本体サポートユニット
７柱状部材（Ｈ型柱）
７０１一方の板
７１１、７１１一対の突状（油圧シリンダの振れ止め）
７０２中間の板
７０３他方の板
７１正面
７２背面
８支持部材（支持プレート）
８１円弧形状
８２凹部
９吊り部材（吊り部）
９１、９１一対の吊りプレート
９２吊り金具
Ｃコンクリート杭
Ｃ１杭頭 1 Pile head processing device 2 Body 3 Telescopic device (hydraulic cylinder)
31 Actuating rod 4 Actuating part (rail shaped block)
5 Reaction force part (Reaction force plate)
6 Body support unit 7 Columnar member (H-shaped column)
701 One plate 711, 711 Pair of protrusions (hydraulic cylinder steadying)
702 Intermediate plate 703 Other plate 71 Front surface 72 Rear surface 8 Support member (support plate)
81 Arc shape 82 Concave part 9 Suspension member (suspending part)
91, 91 A pair of suspension plates 92 Suspension bracket C Concrete pile C1 Pile head

Claims

A telescopic device, and provided at one end side of the telescopic direction of the telescopic device so as to be able to advance and retreat by the telescopic operation of the telescopic device, are fixed to the other end side of the telescopic direction of the telescopic device and an operating part for crushing concrete. A reaction force part for obtaining a force, the suspension device is suspended inside a pile head of a concrete pile by a suspension means, and the extension device is extended inside the pile head to destroy the pile head. In pile head processing equipment,
A main body support unit for supporting the telescopic device and hanging on the suspension means;
The body support unit is
Columnar members that are long in the vertical direction and can be arranged inside the pile head,
A support member having a planar shape that protrudes in the horizontal direction on the columnar member and can be arranged inside the pile head;
A suspension member formed on the support member or the columnar member and capable of being locked to the suspension means;
Have
The telescopic device is mounted on the support member such that the other end of the telescopic device in the telescopic direction is fixed to the columnar member, and is extendable in the horizontal direction.
The reaction force portion is formed by dividing the columnar member in the vertical direction with respect to the expansion / contraction device on the surface opposite to the extending direction of the expansion / contraction device.
Pile head processing device characterized by that.

The columnar member and / or the support member has a shape corresponding to the inner periphery of the pile head in all or a part of each member, and is configured as a guide for inserting the entire apparatus into the pile head. The pile head processing apparatus as described in.

The columnar member has a predetermined length associated with the length of the pile head, and is configured as a guide for positioning the expansion / contraction device inside the pile head by a relative position of a specific part of the columnar member with respect to the inside of the pile head. The pile head processing apparatus according to 1 or 2.

The pile head processing apparatus according to any one of claims 1 to 3, wherein the operating portion is formed in a rail shape having a substantially I-shaped cross section.