JP3244568U - Casing used for pulling out piles and backfilling - Google Patents

Casing used for pulling out piles and backfilling Download PDF

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JP3244568U
JP3244568U JP2023003377U JP2023003377U JP3244568U JP 3244568 U JP3244568 U JP 3244568U JP 2023003377 U JP2023003377 U JP 2023003377U JP 2023003377 U JP2023003377 U JP 2023003377U JP 3244568 U JP3244568 U JP 3244568U
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casing
pile
backfilling
blade member
stirring blade
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正一 高橋
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有限会社東埼開発
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Abstract

【課題】 杭の引き抜き、埋め戻しに使用するケーシングにおいて、地盤に埋設された既存の杭を引き抜いた後の穴に充填した杭穴注入材を効率的に攪拌する。【解決手段】 杭の外側に回転圧入し、杭の周囲とケーシング外側の地盤との縁を切るためのケーシング1において、ケーシングに取り付けた時にケーシングの全長方向と直行する翼5と、ケーシングの円周方向と直行する翼4を交差させた構成からなる攪拌翼部材2をケーシングの内部に着脱自在に設ける。【選択図】 図4[Problem] To efficiently stir a pile hole injection material filled in a hole after an existing pile buried in the ground is pulled out in a casing used for pulling out and backfilling a pile. [Solution] In a casing 1 that is rotationally press-fitted to the outside of a pile and cuts the edge between the periphery of the pile and the ground outside the casing, wings 5 that run perpendicular to the overall length direction of the casing when attached to the casing, and a circle of the casing. A stirring blade member 2, which has a configuration in which blades 4 extending perpendicular to the circumferential direction are crossed, is detachably provided inside the casing. [Selection diagram] Figure 4

Description

本願考案は、地盤に埋設された既存の杭の引き抜き、埋め戻しに使用するケーシングに関し、より詳細には杭を抜いた後の穴に充填した杭穴注入材を攪拌するためのケーシングに関する。 The present invention relates to a casing used for pulling out and backfilling existing piles buried in the ground, and more specifically relates to a casing for stirring pile hole injection material filled into the hole after the pile has been pulled out.

ビルやマンションなどの建造物の建て替えに際しては既存建造物を解体、撤去しなければならないが、これらの建造物にはそれを支える杭が地盤中に埋設されているのでそれも引き抜くことになる。これに関し、杭の外径より内径が大きいケーシングを、地盤中の杭の外側に回転圧入し、杭の周囲とケーシング外側の地盤との縁を切った後、ケーシングを除去する工法が公知である(特許文献1)。 When rebuilding a structure such as a building or condominium, the existing structure must be demolished and removed, but since these structures have piles buried in the ground to support them, they must also be pulled out. Regarding this, there is a known construction method in which a casing with an inner diameter larger than the outer diameter of the pile is rotatably press-fitted onto the outside of the pile in the ground, the edge between the periphery of the pile and the ground outside the casing is cut, and then the casing is removed. (Patent Document 1).

この場合、杭を地中から引き抜くと、地盤に杭抜き穴が生ずるので、この杭抜き穴を流動化処理土、貧配合セメントミルクなどの杭穴注入材で埋めなければならなかった(特許文献2)。この場合、杭穴注入材はそのままでは杭穴内に均一に行き渡らないので、例えばスパイラルオーガや羽根付き掘削ロッドなどの攪拌装置を使用して攪拌していた。 In this case, when the pile is pulled out of the ground, a pile hole is created in the ground, and this hole has to be filled with a pile hole injection material such as fluidized soil or poorly blended cement milk (Patent Document 2). In this case, since the pile hole injection material cannot be uniformly distributed inside the pile hole as it is, it has been stirred using a stirring device such as a spiral auger or a bladed drilling rod.

特開2008-8146号公報Japanese Patent Application Publication No. 2008-8146 特開2009- 256999号公報Japanese Patent Application Publication No. 2009-256999

しかしながら、前記従来技術においては攪拌装置によって杭抜き穴の内壁の土が削られて杭抜き穴が大きくなってしまったり、別途攪拌装置を用意しなければならないので狭小地での工事においてはそれが邪魔になる問題があった。 However, in the above-mentioned conventional technology, the soil on the inner wall of the pile extraction hole is scraped by the stirring device, making the pile extraction hole larger, and a separate stirring device must be prepared, which is difficult for construction in narrow spaces. There was a problem that got in the way.

本願考案は前記の問題を解消した杭の引き抜き、埋め戻しに使用するケーシングを提供することを目的として創作されたものである。 The present invention was created with the aim of providing a casing for use in pulling out and backfilling piles that solves the above-mentioned problems.

すなわち、本願考案の杭の引き抜き、埋め戻しに使用するケーシングは、杭の外側に回転圧入し、杭の周囲とケーシング外側の地盤との縁を切るためのケーシングにおいて、ケーシングに取り付けた時にケーシングの全長方向と直行する翼と、ケーシングの円周方向と直行する翼を交差させた構成からなる攪拌翼部材をケーシングの内部に着脱自在に設けたことを特徴とする。 In other words, the casing used for pulling out and backfilling piles according to the present invention is a casing that is rotated and press-fitted to the outside of the pile to cut the edge between the periphery of the pile and the ground outside the casing, and when attached to the casing, the casing The stirring blade member is detachably provided inside the casing, and has a configuration in which blades running perpendicular to the overall length direction and blades running perpendicular to the circumferential direction of the casing intersect with each other.

また、請求項2記載の考案は前記の杭の引き抜き、埋め戻しに使用するケーシングにおいて、攪拌翼部材はケーシングに取り付けた時にケーシングの全長方向と直行する翼と、ケーシングの円周方向と直行する翼を交差させてケーシングの内壁面に沿った曲面を持つ基板に設けた構成としたことを特徴とする。 Further, in the invention according to claim 2, in the casing used for pulling out and backfilling the piles, the stirring blade member has blades that are perpendicular to the overall length direction of the casing when attached to the casing, and blades that are perpendicular to the circumferential direction of the casing. It is characterized by a configuration in which the blades are arranged in a crisscross manner and provided on a board having a curved surface along the inner wall surface of the casing.

また、請求項3記載の考案は前記の杭の引き抜き、埋め戻しに使用するケーシングにおいて、攪拌翼部材はボルトによってケーシングに取り付けられることを特徴とする。 Further, the invention according to claim 3 is characterized in that , in the casing used for pulling out and backfilling the piles, the stirring blade member is attached to the casing with bolts.

本願考案の杭の引き抜き、埋め戻しに使用するケーシングによれば、杭の引き抜きに使用したケーシングの内部に攪拌翼部材を取り付けて、充填する杭穴注入材の攪拌のために使用するので、スパイラルオーガや羽根付き掘削ロッドなどの攪拌装置を別途用意する必要がなく、そのためのコストを低減でき、さらに狭小地での工事においても最小限の基材で埋め戻しを行なえるので作業効率が向上する。 According to the casing used for pulling out and backfilling piles of the present invention, a stirring blade member is attached to the inside of the casing used for pulling out piles, and is used for stirring the pile hole injection material to be filled. There is no need to prepare a separate agitation device such as an auger or a drilling rod with blades, which reduces costs.Furthermore, work efficiency is improved because backfilling can be performed with the minimum amount of base material even in narrow spaces. .

一方、杭の引き抜きに使用したケーシングを再度利用するので、杭穴の径と同径となり杭抜き穴の内壁の土が削られて杭抜き穴が大きくなってしまうことがない。 On the other hand, since the casing used for pulling out the pile is reused, the diameter is the same as the diameter of the pile hole, and the soil on the inner wall of the pile hole is not scraped away, thereby preventing the pile hole from becoming larger.

本願考案の杭の引き抜き、埋め戻しに使用するケーシングに攪拌翼部材を取り付けた状態の一部切り欠き斜視図。FIG. 2 is a partially cutaway perspective view of a state in which a stirring blade member is attached to a casing used for pulling out and backfilling piles according to the present invention. 攪拌翼部材の斜視図。FIG. 3 is a perspective view of a stirring blade member. 攪拌翼部材の斜視図。FIG. 3 is a perspective view of a stirring blade member. ケーシングの斜視図。A perspective view of the casing. 杭の引き抜き方法の概念図。Conceptual diagram of how to pull out piles.

以下、本願考案の具体的実施例を添付図面に基づいて説明する。図5は本願考案が前提とする杭の引き抜き方法を示す図である。図中符号10は地盤G内に埋設された既存建造物の杭である。上記杭10に対して、杭の外径より内径が大きいケーシング1を、地盤中の杭の外側に回転圧入し、杭の周囲とケーシング外側の地盤との縁を切った後、ケーシングを除去する。図中符号11は杭抜き機、12はケーシングをガイドするリーダー、13はケーシングを回転させるア-スオーガーである。 Hereinafter, specific embodiments of the present invention will be described based on the accompanying drawings. FIG. 5 is a diagram showing a method for pulling out a pile, which is a premise of the present invention. Reference numeral 10 in the figure indicates a pile of an existing building buried in the ground G. The casing 1, which has an inner diameter larger than the outer diameter of the pile, is rotationally press-fitted to the outside of the pile in the ground for the above-mentioned pile 10, and after cutting the edge between the periphery of the pile and the ground outside the casing, the casing is removed. . In the figure, reference numeral 11 is a pile extractor, 12 is a leader that guides the casing, and 13 is an earth auger that rotates the casing.

図中符号2は攪拌翼部材である。上記攪拌翼部材2はここでは鋼板により構成されるものであり、ケーシング1の内壁面に沿った曲面を持つ基板3と、上記基板の内側に突設される攪拌翼部材からなる。上記攪拌翼部材はケーシング1に取り付けた時にケーシングの全長方向と直行する翼5と、ケーシングの円周方向と直行する翼4を交差させた構成からなる。 Reference numeral 2 in the figure is a stirring blade member. The stirring blade member 2 is here constructed of a steel plate, and includes a base plate 3 having a curved surface along the inner wall surface of the casing 1, and a stirring blade member protruding inside the base plate. The agitating blade member has a structure in which, when attached to the casing 1, a blade 5 that runs perpendicular to the overall length direction of the casing and a blade 4 that runs perpendicular to the circumferential direction of the casing intersect with each other.

攪拌翼部材2はケーシング1の内部に着脱自在に取り付けられるものであり、ここではボルト孔6を設けることによりボルトによって取り付けられる。図1は攪拌翼部材2を取り付けたケーシング1を示すものであり、攪拌翼部材はそれに対応する当て板8を介してボルト7により固定される。 The stirring blade member 2 is removably attached to the inside of the casing 1, and is attached here with bolts by providing bolt holes 6. FIG. 1 shows a casing 1 to which a stirring blade member 2 is attached, and the stirring blade member is fixed with bolts 7 via a corresponding backing plate 8. As shown in FIG.

本願考案のケーシングにおいては以上の構成により、杭穴から除去したケーシング1の内部に攪拌翼部材2を取り付け、攪拌翼部材を取り付けたケーシングを再度杭穴内に挿入して、上下反復運動とともに回転運動させて杭先端深度まで挿入することにより、内設した攪拌翼部材により充填する流動化処理土、貧配合セメントミルクなどの杭穴注入材を攪拌できる。 In the casing of the present invention, with the above configuration, the stirring blade member 2 is attached to the inside of the casing 1 which has been removed from the pile hole, and the casing with the stirring blade member attached is inserted again into the pile hole, and the casing is moved up and down repeatedly and rotated. By inserting the pile hole to the depth of the tip of the pile, the pile hole injection material such as fluidized soil, poorly mixed cement milk, etc. to be filled can be stirred by the internal stirring blade member.

1 ケーシング
2 攪拌翼部材
3 基板
4 翼
5 翼
6 ボルト孔
7 ボルト
8 当て板
10 杭
11 杭抜き機
12 リーダー
13 ア-スオーガー
1 Casing 2 Stirring blade member 3 Substrate 4 Blade 5 Blade 6 Bolt hole 7 Bolt 8 Backing plate 10 Pile 11 Pile extractor 12 Leader 13 Earth auger

Claims (3)

杭の外側に回転圧入し、杭の周囲とケーシング外側の地盤との縁を切るためのケーシングにおいて、ケーシングに取り付けた時にケーシングの全長方向と直行する翼と、ケーシングの円周方向と直行する翼を交差させた構成からなる攪拌翼部材をケーシングの内部に着脱自在に設けたことを特徴とする杭の引き抜き、埋め戻しに使用するケーシング。 In a casing that is rotationally press-fitted to the outside of a pile and cuts the edge between the pile and the ground outside the casing, there are wings that run perpendicular to the overall length of the casing when attached to the casing, and wings that run perpendicular to the circumferential direction of the casing when attached to the casing. A casing for use in pulling out piles and backfilling, characterized in that a stirring blade member having a configuration in which two are intersected is removably provided inside the casing. 攪拌翼部材はケーシングに取り付けた時にケーシングの全長方向と直行する翼と、ケーシングの円周方向と直行する翼を交差させてケーシングの内壁面に沿った曲面を持つ基板に設けた構成とした請求項1記載の杭の引き抜き、埋め戻しに使用するケーシング。 A claim in which the stirring blade member is provided on a substrate having a curved surface along the inner wall surface of the casing, with blades running perpendicular to the overall length direction of the casing and blades perpendicular to the circumferential direction of the casing intersecting each other when attached to the casing. A casing used for pulling out and backfilling piles as described in Item 1. 攪拌翼部材はボルトによってケーシングの内部に取り付けられる請求項2記載の杭の引き抜き、埋め戻しに使用するケーシング。 3. The casing used for extracting and backfilling piles according to claim 2, wherein the stirring blade member is attached to the inside of the casing by bolts.
JP2023003377U 2023-09-14 2023-09-14 Casing used for pulling out piles and backfilling Active JP3244568U (en)

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