JP5440772B2

JP5440772B2 - Anchor load cell attaching / detaching system, anchor load meter co-installation set, anchor load meter attaching / detaching unit, and load meter attaching / detaching method to / from anchor

Info

Publication number: JP5440772B2
Application number: JP2009223563A
Authority: JP
Inventors: 俊典酒井; 正展永野; 敬典永野; 善弘常川; 聖哉横田; 将竹本; 優藤原
Original assignee: Mie University NUC
Current assignee: Mie University NUC
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2014-03-12
Anticipated expiration: 2029-09-29
Also published as: JP2011075277A

Description

本発明は、定着後のアンカーストラクチャーに荷重計（荷重測定器）を追加して設置するためのアンカー荷重計着脱システム（荷重計及びジャッキを含むもの）、アンカー荷重計共設置セット（荷重計を含みジャッキを必須としないもの）、アンカー荷重計着脱ユニット（荷重計及びジャッキを必須としないもの）、およびこれによるアンカーへの荷重計着脱方法に関する。 The present invention includes an anchor load meter attachment / detachment system (including a load meter and a jack) for installing an anchor load meter (load measuring device) in the anchor structure after being established, A load meter that does not require a jack), an anchor load meter attaching / detaching unit (a load meter and a jack that are not required), and a load meter attaching / detaching method to / from the anchor.

プレストレストコンクリートにおける緊張力付与や傾斜地の土留め等に使用されるアンカーは、経年によって設置地盤内の緊張力が緩むと支持強度が得られず設置の意味をなさなくなってしまう。また、想定以上の負荷が加わり過度に緊張力が増加すると、アンカー自体が破損し地表へ飛び出したりして安全性が損なわれる場合がある。このため、既設アンカーの緊張力変化の計測を行う必要がある。 Anchors used for applying tension in prestressed concrete, retaining earth on slopes, etc., do not make sense for installation because support strength cannot be obtained if the tension in the installation ground loosens over time. Moreover, when the load more than assumption is added and tension | tensile_strength increases too much, anchor itself may be damaged and it may jump out to the ground surface, and safety | security may be impaired. For this reason, it is necessary to measure the tension change of the existing anchor.

この緊張力変化の測定装置として従来、アンカーヘッドと前記支圧板とを離間させるための油圧式荷重計と、油圧ポンプと、前記油圧ポンプから前記油圧式荷重計に供給される油量の変化を計測するための油量検出装置と、前記油圧式荷重計に作用する油圧を測定するための油圧計測器と、から構成される装置が開示される（例えば、特許文献１参照）。 Conventionally, as a measuring device for the tension change, a hydraulic load meter for separating the anchor head and the bearing plate, a hydraulic pump, and a change in the amount of oil supplied from the hydraulic pump to the hydraulic load meter are measured. An apparatus including an oil amount detection device for measuring and a hydraulic pressure measuring device for measuring the hydraulic pressure acting on the hydraulic load meter is disclosed (for example, see Patent Document 1).

また従来、緊張線材の緊張力検知に必要なコストや労力を低減することができるグランドアンカー緊張力検知システムとして、緊張線材の緊張力を受圧するアンカープレートに、前記アンカープレートの曲げ歪み量を検出する歪みセンサを装備するとともに、前記歪みセンサと電気的に接続されて、前記歪みセンサの検出する曲げ歪み量から前記緊張線材の緊張力低下を算出する緊張力モニター装置とを備えるものが開示される（例えば、特許文献２参照）。これは予め対処していなかった既設のグランドアンカーに対しても緊張力検知を実施可能である、とされる。 Conventionally, as a ground anchor tension detection system that can reduce the cost and labor required for tension detection of tension wire, the amount of bending strain of the anchor plate is detected in the anchor plate that receives the tension of tension wire. And a tension monitor that is electrically connected to the strain sensor and calculates a decrease in tension of the tension wire from the amount of bending strain detected by the strain sensor. (For example, see Patent Document 2). It is said that tension can be detected even for an existing ground anchor that has not been dealt with in advance.

特開２００２−２５７６５４号公報JP 2002-257654 A 特開２００６−１６２５１１号公報JP 2006-162511 A

しかしながら前者の緊張力低下の測定装置は、既設のアンカーにおけるアンカーヘッドのアンカープレートからの突出量やアンカーヘッドの固定方式によって、荷重計を後付けするための隙間を形成することが困難な場合があるなど、設置上の問題が生じるものであった。 However, the former measuring device for tension reduction may be difficult to form a gap for retrofitting a load meter depending on the amount of protrusion of the anchor head from the anchor plate in the existing anchor or the anchor head fixing method. There was a problem in installation.

また後者のグランドアンカー緊張力検知システムは、汎用の荷重計ではなく歪みセンサを装備した特殊なアンカープレートを使用するものであるため、荷重計に異常が発生したときに交換しにくいといった、製品調達上の問題、或いは生産量に伴う価格上の問題が存在した。またアンカープレートに歪みセンサを装備しているため、均等な受圧領域の設定が困難であり、荷重計の後付けを行う場合に正確な緊張力測定を保証しにくいものであった。 The latter ground anchor tension detection system uses a special anchor plate equipped with a strain sensor instead of a general-purpose load meter, so it is difficult to replace the load meter when an abnormality occurs. There was a problem above, or a price problem associated with production. In addition, since the anchor plate is equipped with a strain sensor, it is difficult to set a uniform pressure receiving region, and it is difficult to guarantee accurate tension measurement when retrofitting a load meter.

そこで本発明では、既設のアンカーにおけるアンカーヘッドのアンカープレートからの突出量やアンカーヘッドの固定方式によらず、確実に荷重計を後付けすることができ、また、汎用の荷重計でも取り付けることができるため製品調達上の問題、或いは生産量に伴う価格上の問題が生じにくく、さらに正確な緊張力測定を保証することのできるアンカー荷重計着脱ユニットおよびこれによるアンカーへの荷重計着脱方法を提供することを課題とする。 Therefore, in the present invention, the load meter can be reliably retrofitted regardless of the protruding amount of the anchor head from the anchor plate in the existing anchor or the anchor head fixing method, and can be attached even with a general-purpose load meter. Therefore, there is provided an anchor load meter attaching / detaching unit that can prevent a problem in product procurement or a price problem associated with a production amount, and can guarantee an accurate tension measurement, and a load meter attaching / detaching method to / from an anchor using the unit. This is the issue.

上記課題を解決すべく本発明では以下（１）〜（７）の手段を採用する。 In order to solve the above problems, the present invention employs the following means (1) to (7).

（１）本発明のアンカー荷重計着脱システムは、支圧板Ｐ上にて定着部（Ｅ／Ｎ）が取り付けられて定着されたアンカーの余長部Ａに荷重計を追加で設置しまたは追加設置した荷重計を取り外す荷重計の着脱システムであって、
余長部Ａの周囲を囲って載置された荷重計２と、
余長部Ａの先端側へ間接的または直接的に取り付けられた挟み込みナット３と、
挟み込みナット３及び定着部（Ｅ／Ｎ）と共に余長部Ａを地表側に引揚げてジャッキアップするジャッキ４とを具備してなり、
前記挟み込みナット３は、それ自体の内螺子部３１０によって余長部Ａを間接的または直接的に固定する第二ナット３１と、第二ナット３１の周囲に拡がって設けられた挟み込み板３２とを有し、
挟み込み板３２の上部又はその上方に設置されたジャッキ４によって余長部Ａを地表側に引揚げて、定着部（Ｅ／Ｎ）を支圧板Ｐから離間させた離間状態とし、
この離間状態で、挟み込み板３２の下面を前記載置された荷重計２の上面に当接させて荷重計２を支圧板Ｐとの間に挟み込むことを特徴とする。 (1) In the anchor load meter attaching / detaching system of the present invention, a load meter is additionally installed or additionally installed in the extra length portion A of the anchor fixed on the bearing plate P with the fixing portion (E / N) attached. A load cell attaching / detaching system for removing a load meter,
A load cell 2 placed around the surplus part A;
A pinch nut 3 that is indirectly or directly attached to the distal end side of the surplus portion A;
A jack 4 that lifts the extra length portion A to the ground surface side and jacks up together with the sandwiching nut 3 and the fixing portion (E / N),
The sandwiching nut 3 includes a second nut 31 that indirectly or directly fixes the extra length portion A by its own internal threaded portion 310, and a sandwiching plate 32 that extends around the second nut 31. Have
The extra length portion A is lifted to the ground surface side by the jack 4 installed above or above the sandwiching plate 32, and the fixing portion (E / N) is separated from the bearing plate P.
In this separated state, the lower surface of the sandwiching plate 32 is brought into contact with the upper surface of the load meter 2 placed above, and the load meter 2 is sandwiched between the bearing plate P.

（２）上記記載のアンカー荷重計着脱システムにおいて、余長部Ａへ周着して余長部Ａの先端構造を軸方向上方へ延伸するアジャスター１を具備し、
前記挟み込みナット３は、余長部Ａへ周着したアジャスター１を介して余長部Ａの先端側へ間接的に取り付けられたものであることが好ましい。 (2) In the anchor load meter attaching / detaching system described above, the adjuster 1 is attached to the surplus portion A and extends the tip structure of the surplus portion A upward in the axial direction.
It is preferable that the pinching nut 3 is indirectly attached to the distal end side of the surplus length portion A via an adjuster 1 that is attached to the surplus length portion A.

（３）上記記載のアンカー荷重計着脱システムにおいて、余長部Ａまたは定着部（Ｅ／Ｎ）に固定されると共に外螺子部を有するプリングヘッド６を具備し、
前記アジャスター１は、プリングヘッド６の外螺子部と螺合する内螺子部を有し、余長部Ａ又は定着部に固定されたプリングヘッド６を介して余長部Ａへ周着することが好ましい。 (3) The anchor load meter attaching / detaching system described above includes a pulling head 6 that is fixed to the extra length portion A or the fixing portion (E / N) and has an external screw portion,
The adjuster 1 has an inner screw portion that is screwed with an outer screw portion of the pulling head 6, and can be attached to the extra length portion A via the extra length portion A or the pulling head 6 fixed to the fixing portion. preferable.

（４）上記いずれか記載のアンカー荷重計着脱システムにおいて、余長部Ａの周囲を囲って支圧板Ｐと荷重計２の間に挟設されたベース材５を具備し、
ベース材５には、地表側に引揚げられた余長部Ａに周着した定着具（Ｅ／Ｎ）を上方へ移動させるための側方窓５ｗを有することが好ましい。 (4) In the anchor load meter attaching / detaching system according to any one of the above, the base material 5 is provided so as to surround the surplus length portion A and sandwiched between the bearing plate P and the load meter 2;
It is preferable that the base material 5 has a side window 5w for moving the fixing tool (E / N) around the surplus portion A lifted to the ground surface side upward.

（５）本発明のアンカー荷重計共設置セットは、支圧板Ｐ上にて定着部（Ｅ／Ｎ）が取り付けられて定着された既設のアンカーの余長部Ａに荷重計を追加設置する際に共に設置される複数の構成材のセットであって、前記アンカー荷重計着脱システムのうちジャッキ４をふくまない共設置セットである。その構成として、
余長部Ａの周囲を囲って載置されうる筒状の荷重計２と、
余長部Ａの先端側へ間接的または直接的に取り付けられうる挟み込みナット３とを具備してなり、
前記挟み込みナット３は、それ自体の内螺子部３１０によって余長部Ａを間接的または直接的に固定しうる第二ナット３１と、第二ナット３１の周囲に拡がって設けられた挟み込み板３２とを有すると共に、
定着部（Ｅ／Ｎ）が支圧板Ｐから離間した状態で、挟み込み板３２の下面が前記載置された荷重計２の上面に当接して荷重計２を支圧板Ｐとの間に挟み込みうることを特徴とする。 (5) The anchor load meter co-installation set according to the present invention is used when an additional load meter is installed on the extra length portion A of the existing anchor fixed on the bearing plate P with the fixing portion (E / N) attached. A set of a plurality of components that are installed together, and is a co-installation set that does not include the jack 4 in the anchor load meter attaching / detaching system. As its configuration,
A cylindrical load cell 2 that can be placed around the surplus part A;
A pinching nut 3 that can be indirectly or directly attached to the distal end side of the surplus portion A,
The sandwiching nut 3 includes a second nut 31 that can indirectly or directly fix the surplus length portion A by its own internal screw portion 310, and a sandwiching plate 32 that extends around the second nut 31. And having
In a state where the fixing portion (E / N) is separated from the bearing plate P, the lower surface of the sandwiching plate 32 can come into contact with the upper surface of the load meter 2 placed as described above so that the load meter 2 can be sandwiched between the bearing plate P. It is characterized by that.

（６）本発明のアンカー荷重計着脱ユニットは、支圧板Ｐ上に突出した余長部Ａに定着具が取り付けられることで地表定着された既設のアンカーにおいて、センターホール２ｈを有した筒状の荷重計２を追加で着脱するためのアンカー荷重計着脱ユニットであって、
アンカーの余長部Ａへ周着して余長部Ａの先端構造を軸方向上方に延伸させるアジャスター１と、
荷重計２の端面形状を含む大きさの挟み込み板３２を有すると共にアジャスター１の先端部に螺着しうる挟み込みナット３とを具備してなり、
荷重計２のセンターホール２ｈ内に余長部Ａ及びアジャスター１を挿通させ、荷重計２を支圧板Ｐ上に立設した状態で、
アジャスター１の先端部１２が、軸方向に沿って荷重計２の設置高さよりも上方まで延伸し、挟み込みナット３の挟み込み板３２が、その下部に当接させた荷重計２を支圧板Ｐとの間に挟み込み、かつ定着具が支圧板Ｐから離間したものとなることを特徴とする。 (6) The anchor load meter attaching / detaching unit according to the present invention is a cylindrical anchor having a center hole 2h in an existing anchor fixed on the ground surface by attaching a fixing tool to the extra length portion A protruding on the bearing plate P. An anchor load meter attaching / detaching unit for additionally attaching / detaching the load meter 2,
An adjuster 1 that surrounds the extra length portion A of the anchor and extends the tip structure of the extra length portion A upward in the axial direction;
A sandwiching plate 32 having a size including the end face shape of the load cell 2 and a sandwiching nut 3 that can be screwed to the tip of the adjuster 1;
In the state where the extra length portion A and the adjuster 1 are inserted into the center hole 2h of the load meter 2 and the load meter 2 is erected on the bearing plate P,
The tip portion 12 of the adjuster 1 extends along the axial direction to a position higher than the installation height of the load meter 2, and the load meter 2 with the pinch plate 32 of the pinch nut 3 brought into contact with the lower portion of the load meter 2 And the fixing tool is separated from the bearing plate P.

（７）本発明のアンカーへの荷重計着脱方法は、定着したアンカーの地表部よりも上方に突出した余長部Ａを内部挿通しうる荷重計２と、余長部Ａの先端側に直接または間接的に周着しうる挟み込みナット３と、挟み込みナット３が周着した余長部Ａのさらに先側に固定されて余長部Ａをジャッキアップするジャッキ４からなるアンカー荷重計着脱システムによって、既設のアンカーの余長部Ａに荷重計を追加で着脱するアンカーへの荷重計着脱方法であって、
アンカーの余長部Ａの周囲に荷重計２を載置して余長部Ａを囲った状態とする荷重計載置工程（ｂ）と、
周着させた余長部Ａの先側から挟み込みナット３を周着して棒状の基端部１１側の所定の螺進位置まで螺進させ、載置した荷重計２の上部を覆って地表側に挟み込む第一挟み込み工程（ｃ）と、
余長部Ａの先端部にジャッキ４を固定して、周着された挟み込みナット３と共に余長部Ａを地表側に引揚げてジャッキアップする引揚げ工程（ｅ１）と、
挟み込みナット３を、前記第一挟み込み工程（ｃ）の螺進位置よりもさらに基端側の螺進位置まで螺進させ、ジャッキアップによって余長部Ａが地表側へ引揚げられた状態で荷重計２を地表側に挟み込む第二挟み込み工程（ｅ２）と、
ジャッキ４の引揚げを解除して余長部Ａから取り外す取り外し工程（ｆ）を順に具備することを特徴とする。 (7) The load meter attaching / detaching method to / from the anchor of the present invention includes a load meter 2 capable of inserting the surplus length portion A protruding upward from the ground surface portion of the anchor anchor, and the distal end side of the surplus length portion A directly. Alternatively, an anchor load meter attaching / detaching system comprising a pinch nut 3 that can be indirectly attached and a jack 4 that is fixed further to the front side of the surplus length portion A to which the pinch nut 3 is circumferentially attached and jacks up the surplus length portion A. , A load meter attaching / detaching method to an anchor in which a load meter is additionally attached / detached to / from an extra length portion A of an existing anchor,
A load meter placing step (b) in which the load cell 2 is placed around the surplus length portion A of the anchor to surround the surplus length portion A;
The sandwiching nut 3 is circumferentially attached from the front side of the extra length portion A that is circumferentially attached, and is screwed to a predetermined screwing position on the rod-like base end portion 11 side, covering the upper portion of the loaded load meter 2 and covering the ground. A first sandwiching step (c) sandwiching the front side;
A lifting step (e1) in which the jack 4 is fixed to the distal end portion of the surplus length portion A, the surplus length portion A is lifted to the ground surface side together with the sandwiched nut 3 and the jack up.
The load is applied in a state in which the pinching nut 3 is screwed up to a screwing position further proximal than the screwing position in the first pinching step (c) and the extra length A is lifted to the ground surface side by jacking up. A second sandwiching step (e2) for sandwiching the total 2 on the ground surface side;
A step of removing the jack 4 from the surplus length portion A by releasing the lifting of the jack 4 is sequentially provided.

上記設置方法によれば、既存の定着部で支圧板上に定着されたアンカーを、ジャッキによって一旦定着部ごと引き揚げ、この引き揚げた状態のまま荷重計を挟みこむことで、余長部Ａの先側に挟み込みナット３を確実に定着させることができる。そして上記設置方法による荷重計の設置後には、アンカー定着機能を、既存の定着部に置き換わって、新設された挟み込みナット３が果たすものとなる。 According to the above installation method, the anchor fixed on the bearing plate by the existing fixing portion is once lifted together with the fixing portion by a jack, and the load meter is sandwiched in the lifted state, so that the tip of the extra length portion A The sandwiching nut 3 can be reliably fixed to the side. After the load meter is installed by the above installation method, the anchor fixing function is replaced with the existing fixing unit, and the newly installed pinching nut 3 performs.

なお、上記アンカーへの荷重計着脱方法において、余長部Ａの長さが荷重計よりも短い場合には、余長部Ａの先端にアジャスター１を周着させるアジャスター定着工程を荷重計載置工程の前に具備するものとしてもよい。 In the load meter attaching / detaching method to the anchor, when the length of the surplus portion A is shorter than that of the load meter, an adjuster fixing step of placing the adjuster 1 around the tip of the surplus portion A is placed on the load meter. It may be provided before the process.

本発明のアンカー荷重計着脱システム、荷重計共設置セット、アンカー荷重計着脱ユニットおよびこれによるアンカーへの荷重計着脱方法は、上記手段を講じることで、既設のアンカーにおけるアンカーヘッドのアンカープレートからの突出量やアンカーヘッドの固定方式によらず、確実に荷重計を後付けすることができるものとなった。また、汎用の荷重計を後付けすることができるため、特殊な荷重計を使用する場合と比べて製品調達上の問題、或いは生産量に伴う価格上の問題が生じにくく、さらに正確な緊張力測定を保証しうるものとなった。 The anchor load meter attaching / detaching system, load meter co-installation set, anchor load meter attaching / detaching unit and load meter attaching / detaching method to / from the anchor according to the present invention can be achieved by taking the above-described means from the anchor plate of the anchor head in the existing anchor. Regardless of the amount of protrusion or the anchor head fixing method, the load meter can be attached securely. In addition, since a general-purpose load cell can be retrofitted, it is less likely to cause product procurement problems or price problems associated with production volume compared to the use of a special load cell. Can be guaranteed.

本発明の実施例１のアンカー荷重計着脱ユニットを含むアンカー荷重計着脱システムの分解斜視図。1 is an exploded perspective view of an anchor load meter attaching / detaching system including an anchor load meter attaching / detaching unit according to Embodiment 1 of the present invention. 実施例１のうちアンカー荷重計着脱ユニットの下斜視図。The bottom perspective view of an anchor load meter attaching / detaching unit in the first embodiment. 本発明の実施例１のアンカーへの荷重計着脱方法における第一挟み込み工程（ｃ）までの説明図。Explanatory drawing to the 1st pinching process (c) in the load meter attachment / detachment method to the anchor of Example 1 of this invention. 実施例１の荷重計設置方法におけるジャッキ取り付け状態（Ｓ４）までの説明図。Explanatory drawing to the jack attachment state (S4) in the load meter installation method of Example 1. FIG. 実施例１の荷重計設置方法における定着部緩動工程（ｅ３）及び引揚げ解除工程（ｅ４）までの説明図。Explanatory drawing to the fixing | fixed part slow motion process (e3) in the load meter installation method of Example 1, and a lifting cancellation | release process (e4). 実施例１のアンカー荷重計着脱システムの引揚げ解除工程（ｅ４）後の状態を示す軸断面説明図。The axial cross-section explanatory drawing which shows the state after the lifting cancellation | release process (e4) of the anchor load meter attachment / detachment system of Example 1. FIG. 実施例２のアンカー荷重計着脱システムの定着部緩動工程（ｅ３）後の定着部緩動状態を示す軸断面説明図。The axial cross-section explanatory drawing which shows the fixing | fixed part slow movement state after the fixing | fixed part slow moving process (e3) of the anchor load meter attachment / detachment system of Example 2. FIG. 本発明の実施例３のアンカー荷重計着脱ユニットを含むアンカー荷重計着脱システムの分解斜視図。The disassembled perspective view of the anchor load cell attaching / detaching system including the anchor load meter attaching / detaching unit according to the third embodiment of the present invention. 実施例３のアンカー荷重計着脱システムの定着部緩動工程（ｅ３）後の定着部緩動状態を示す軸断面説明図。The axial cross-section explanatory drawing which shows the fixing | fixed part slow movement state after the fixing | fixed part slow moving process (e3) of the anchor load meter attachment / detachment system of Example 3. FIG. 本発明の実施例４のアンカー荷重計着脱ユニットを含むアンカー荷重計着脱システムの分解斜視図。The disassembled perspective view of the anchor load cell attaching / detaching system including the anchor load meter attaching / detaching unit according to the fourth embodiment of the present invention.

本発明のアンカー荷重計着脱システム、アンカー荷重計共設置セット及びアンカー荷重計着脱ユニットは、定着後のアンカー構造体（建築物や構造物設置のための仮設アンカー、基礎アンカーを含む）を対象とし、特に、土留め用に設置された施工済みのグラウンドアンカーを取り付け対象とする。グラウンドアンカーの多くは、地中に定着させたテンドンを緊張させてその余長部Ａが法面である地表の支圧板Ｐ上に突出し、支圧ナットＮによって定着されており、予め荷重計が取り付けられているものと取り付けられていないものが存在する。本発明のアンカー荷重計着脱ユニットは、荷重計の取り付けられていないアンカーの余長部Ａに荷重計を追加で着脱する、或いは荷重計が取り付けられているアンカーの余長部Ａにさらに荷重計を追加で着脱するために用いられる。 The anchor load meter attaching / detaching system, anchor load meter co-installation set, and anchor load meter attaching / detaching unit of the present invention are intended for anchor structures (including temporary anchors and foundation anchors for building and structure installation) after establishment. In particular, a ground anchor that has already been installed for earth retaining is used as an attachment target. Most of the ground anchors tendon the tendon fixed in the ground, and the extra length A protrudes on the bearing plate P on the ground surface, which is the slope, and is fixed by the bearing nut N. Some are attached and some are not. The anchor load meter attaching / detaching unit according to the present invention additionally attaches / detaches the load meter to / from the extra length portion A of the anchor to which the load meter is not attached, or further attaches the load meter to the extra length portion A of the anchor to which the load meter is attached. It is used to add and remove.

（アンカー荷重計着脱システム）
本発明のアンカー荷重計着脱システムは、余長部Ａが支圧板上に突出し、余長部Ａに取り付けられた定着具によって支圧板上に定着された既設の或いは新設のアンカーにおいて、余長部Ａを定着具ごと地表側へ引き揚げた状態のまま、センターホール２ｈを有した筒状の荷重計２を追加で着脱又は交換するために必要とするすべての構成からなるものであって、基本的に、アンカー荷重計着脱共設置セットとジャッキ４とから構成される（図１，７，８，９，１０）。このうちアンカー荷重計着脱共設置セットは、アンカー荷重計着脱ユニットと荷重計２とから構成される（図６）。さらにこのうちアンカー荷重計着脱ユニットは、アンカーの余長部Ａを軸方向へ延伸させるアジャスター１と、アジャスター１の先端部に螺着しうる挟み込みナット３とから構成される。 (Anchor load cell attachment / detachment system)
In the anchor load meter attaching / detaching system of the present invention, the extra length portion A protrudes on the bearing plate and is fixed on the bearing plate by a fixing tool attached to the extra length portion A. It consists of all the structures required to add / remove or replace the cylindrical load cell 2 with the center hole 2h while keeping A together with the fixing tool. And an anchor load meter attachment / detachment set and a jack 4 (FIGS. 1, 7, 8, 9, and 10). Among them, the anchor load meter attachment / detachment co-installation set includes an anchor load meter attachment / detachment unit and a load meter 2 (FIG. 6). Further, among these, the anchor load meter attaching / detaching unit includes an adjuster 1 that extends the extra length portion A of the anchor in the axial direction, and a pinching nut 3 that can be screwed to the tip end of the adjuster 1.

ただしアンカーの余長部Ａが十分な長さを持ち、延伸させる必要がない場合にはアジャスター１を省略した構成とし、アンカー余長部Ａを内部挿通しうる荷重計２と、アンカー余長部Ａの先端部に螺着しうる挟み込みナット３のみから構成される。これは荷重計共設置セット或いはアンカー荷重計着脱ユニットにおいても同様である。 However, when the extra length portion A of the anchor has a sufficient length and does not need to be extended, the adjuster 1 is omitted, the load meter 2 through which the anchor extra length portion A can be inserted, and the extra anchor length portion. It is comprised only of the pinching nut 3 which can be screwed to the front-end | tip part of A. The same applies to the load cell co-installation set or the anchor load cell attachment / detachment unit.

（アンカー荷重計共設置セット）
本発明のアンカー荷重計共設置セットはアンカー荷重計着脱システムからジャッキ４を除いたものであり、荷重計２の追加設置によってジャッキ４を取り除いた後の、アンカーに取り付けられた荷重計２を含むセットである。例えば図６の状態において荷重計２と共に追設置されて残る構成を示す。このセットは基本的に、アンカーの余長部Ａを軸方向へ延伸させるアジャスター１と、アジャスター１を内部挿通しうる荷重計２と、アジャスター１の先端部に螺着しうる挟み込みナット３とから構成される。ただしアンカーの余長部Ａが十分な長さを持ち、延伸させる必要がない場合にはアジャスター１を省略した構成とすることができる。 (Anchor load cell set together)
The anchor load meter co-installation set of the present invention is obtained by removing the jack 4 from the anchor load meter attaching / detaching system, and includes the load meter 2 attached to the anchor after the jack 4 is removed by additional installation of the load meter 2. Is a set. For example, the structure which is additionally installed with the load cell 2 in the state of FIG. 6 is shown. This set basically includes an adjuster 1 that extends the extra length portion A of the anchor in the axial direction, a load meter 2 through which the adjuster 1 can be inserted, and a pinching nut 3 that can be screwed to the tip of the adjuster 1. Composed. However, if the extra length portion A of the anchor has a sufficient length and does not need to be stretched, the adjuster 1 can be omitted.

（アンカー荷重計着脱ユニット）
本発明のアンカー荷重計着脱ユニットはアンカー荷重計共設置セットからさらに荷重計２を除いたものであり、荷重計２を追加設置する際に荷重計２と共に追加設置され、追加設置工程後に残る荷重計２以外の構成からなる。このユニットは基本的に以下の構成を具備する（図２）。
・アンカーの余長部Ａに周着して余長部Ａを軸方向地表側へ延伸させるアジャスター１
・荷重計２の筒端面形状を含む大きさの挟み込み板３２を有し、かつ余長部Ａの先端側に直接的にまたは間接的に周着しうる挟み込みナット３
なおアンカーを引き揚げるジャッキ４は、追加設置工程後に取り外す（図６）ため、本ユニットに含まれない。ただし、アンカーの余長部Ａが十分な長さを持ち、延伸させる必要がない場合には、アジャスター１を省略した構成とし、挟み込みナット３単独でアンカー荷重計着脱ユニットを構成することも可能である。この場合、挟み込みナット３は荷重計２の筒端面形状を含む大きさの挟み込み板３２を有し、かつ余長部Ａの先端側に直接的に周着する。 (Anchor load cell attachment / detachment unit)
The anchor load meter attaching / detaching unit of the present invention is obtained by further removing the load meter 2 from the anchor load meter co-installation set, and is additionally installed together with the load meter 2 when the load meter 2 is additionally installed, and the load remaining after the additional installation process Consists of configurations other than 2 in total. This unit basically has the following configuration (FIG. 2).
・ Adjuster 1 that surrounds the surplus length portion A of the anchor and extends the surplus length portion A toward the ground surface in the axial direction.
A sandwiching nut 3 having a sandwiching plate 32 having a size including the shape of the cylinder end face of the load cell 2 and capable of being directly or indirectly attached to the distal end side of the extra length portion A
The jack 4 for lifting the anchor is not included in this unit because it is removed after the additional installation step (FIG. 6). However, if the extra length portion A of the anchor has a sufficient length and does not need to be extended, the adjuster 1 can be omitted, and the anchor load meter attaching / detaching unit can be configured by the pinch nut 3 alone. is there. In this case, the pinching nut 3 has a pinching plate 32 having a size including the shape of the cylinder end face of the load cell 2 and is directly attached to the distal end side of the surplus length portion A.

また上記基本的構成（アジャスター１と挟み込みナット３）に加え、必要に応じて荷重計載置高さを調整するために設置されるベース材５を具備するものでもよい（図１、実施例１）。 Further, in addition to the above basic configuration (adjuster 1 and sandwiching nut 3), a base material 5 may be provided to adjust the load meter mounting height as required (FIG. 1, Example 1). ).

或いは上記基本的構成（アジャスター１と挟み込みナット３）に加え、必要に応じて新たなくさび式定着を行うためのプリングヘッド６を具備し、アジャスター１がこのプリングヘッド６を介してアンカーの余長部Ａに間接的に周着するものとしてもよい（図１０、実施例４）。 Alternatively, in addition to the above basic configuration (adjuster 1 and pinching nut 3), a pulling head 6 for performing a new wedge-type fixing is provided if necessary, and the adjuster 1 is provided with an extra length of anchor via the pulling head 6. It is good also as what is indirectly attached to the part A (FIG. 10, Example 4).

（アンカーへの荷重計着脱方法）
また本発明のアンカーへの荷重計着脱方法は、余長部Ａに固定しうるアジャスター１を一構成に有する前記アンカー荷重計着脱ユニットと、アジャスター１を内部挿通しうる特殊な或いは汎用の荷重計２と、アジャスター１を軸方向地表側へジャッキアップしうる特殊な或いは汎用のジャッキ４とを用いて、前記アンカーに荷重計を後付け設置状態とするための設置方法であって、以下工程を具備する（図３〜図５）。
・余長部Ａの周囲に荷重計２を載置する荷重計載置工程（ｂ）
・余長部Ａに挟み込みナット３を周着して、載置した荷重計２の上部を覆い、荷重計２を挟み込みナット３によって地表側に挟み込む第一挟み込み工程（ｃ）
・余長部Ａを引き揚げるべくジャッキ４をセットして挟み込みナット３や定着具と共に余長部Ａを地表側にジャッキアップする引揚げ工程（ｅ１）
・ジャッキアップによって余長部Ａが地表側へ引き上げられた状態で挟み込みナット３を下方（支圧板Ｐ方向）に移動させて荷重計２を改めて地表側に挟み込む第二挟み込み工程（ｅ２）
・ジャッキ４の引揚げを解除してアジャスター１から取り外し、アンカー荷重計共設置セットのみ残した状態とする取り外し工程（ｆ）
以下、各実施例の構成と共に詳述する。 (Load meter attachment to anchor)
The load meter attaching / detaching method to / from the anchor according to the present invention includes the anchor load meter attaching / detaching unit having the adjuster 1 which can be fixed to the extra length portion A in one configuration, and a special or general-purpose load meter capable of inserting the adjuster 1 inside. 2 and a special or general-purpose jack 4 that can jack up the adjuster 1 to the ground surface side in the axial direction. (FIGS. 3 to 5).
・ Load meter placing step (b) of placing the load meter 2 around the extra length portion A
A first clamping step (c) in which a clamping nut 3 is placed around the extra length portion A, the upper part of the loaded load meter 2 is covered, and the load meter 2 is clamped on the ground surface side by the clamping nut 3.
-Lifting step (e1) in which the jack 4 is set to lift the surplus portion A and the extra length A is jacked up to the ground side together with the nut 3 and the fixing tool.
A second clamping step (e2) in which the clamping nut 3 is moved downward (in the direction of the bearing plate P) while the surplus portion A is pulled up to the ground side by jacking up and the load cell 2 is sandwiched again on the ground side.
・ Removal step (f) of releasing the jack 4 and removing it from the adjuster 1 and leaving only the anchor load meter co-installation set.
Hereinafter, the configuration of each embodiment will be described in detail.

実施例１（図１〜図６）のアンカー荷重計着脱ユニットは挟み込みナット３に加え、アンカーの余長部Ａへ周着して余長部Ａの先端構成を軸方向上方に延伸させるアジャスター１を具備しており、挟み込みナット３はこのアジャスター１の延伸部分に螺着することで、余長部Ａの先端側に間接的に周着する。 In addition to the pinching nut 3, the anchor load meter attaching / detaching unit of the first embodiment (FIGS. 1 to 6) is attached to the surplus length portion A of the anchor, and the adjuster 1 that extends the tip configuration of the surplus length portion A upward in the axial direction. The sandwiching nut 3 is indirectly attached to the distal end side of the extra length portion A by being screwed to the extending portion of the adjuster 1.

さらに実施例１では上記構成に加え、支圧板Ｐ上であって余長部Ａの周囲を囲って荷重計の下部に配置され、必要に応じて荷重計載置高さを調整する、あるいは／及び定着具Ｅ／Ｎを地表側へ緩動させるベース材５を１枚具備する（図１、図３（ｂ１））。なお実施例２では同一形状のベース材５を２枚具備すると共に、新たなくさび式定着を行うためのプリングヘッド６を具備する。また後述する実施例３では一つのベース材５のみを具備する。 Further, in the first embodiment, in addition to the above-described configuration, it is arranged on the support plate P and surrounding the extra length A at the lower part of the load meter, and the load meter mounting height is adjusted as necessary. And one base member 5 for slowly moving the fixing device E / N to the ground surface side (FIG. 1, FIG. 3 (b1)). In the second embodiment, two base materials 5 having the same shape are provided, and a pulling head 6 for performing a new wedge-type fixing is provided. In Example 3 described later, only one base material 5 is provided.

（アジャスター１）
アジャスター１は、アンカーの地表定着部よりも上方の余長部Ａへ周着してこの余長部Ａを軸方向へ延伸させるものであり、具体的には、余長部Ａに周着した状態で、先端部１２が軸方向に沿って荷重計２の設置高さよりも上方まで延伸させる。実施例では筒状の棒状の基端部１１とこれよりも小さい外形の柱状の先端部１２とが同軸上に一体的に連結して構成される。このうち棒状の基端部１１が荷重計２のセンターホール断面よりも小さい断面形状であり、実施例では内部に螺子孔を有し、余長部Ａの外螺子に螺着しうる。なお実施例４では内部の螺子孔はプリングヘッド６の外螺子に螺着しうる。 (Adjuster 1)
The adjuster 1 is placed around the surplus length portion A above the anchoring portion of the anchor and extends the surplus length portion A in the axial direction. Specifically, the adjuster 1 is placed around the surplus length portion A. In this state, the tip end portion 12 extends along the axial direction to a position higher than the installation height of the load meter 2. In the embodiment, a cylindrical rod-like base end portion 11 and a columnar tip end portion 12 having an outer shape smaller than this are integrally connected coaxially. Among these, the rod-like base end portion 11 has a cross-sectional shape smaller than the cross section of the center hole of the load meter 2. In the embodiment, the rod-like base end portion 11 has a screw hole inside and can be screwed to the external screw of the extra length portion A. In the fourth embodiment, the internal screw hole can be screwed to the external screw of the pulling head 6.

（荷重計２）
荷重計２はアジャスター１を内部挿通しうるセンターホール２ｈを有した筒状の荷重計であり、上部又は下部の筒端面を荷重領域として、上下面から挟み込まれた力を測定する。アジャスター１を内部挿通しうるものであればよく、例えば汎用の筒型ロードセル等、特殊形状を有することのない汎用の筒形の荷重計を使用することができる。筒型の荷重計２はアンカーの余長部Ａを囲って立設し、挟み込みナット３に上面から挟み込まれた力を測定することとなるため、受圧領域の違いによる測定誤差が極めて生じにくく、確実な残存緊張力測定を行うことができる。 (Load cell 2)
The load meter 2 is a cylindrical load meter having a center hole 2h through which the adjuster 1 can be inserted, and measures the force sandwiched from the upper and lower surfaces with the upper or lower tube end surface as a load region. What is necessary is just to be able to insert the adjuster 1 into the inside. For example, a general-purpose cylindrical load cell such as a general-purpose cylindrical load cell that does not have a special shape can be used. Since the cylindrical load meter 2 stands up around the extra length portion A of the anchor and measures the force sandwiched from the upper surface of the sandwiching nut 3, a measurement error due to the difference in the pressure receiving region hardly occurs. A reliable residual tension measurement can be performed.

（挟み込みナット３）
挟み込みナット３は、アジャスター１の外螺子部に螺着しうる内螺子部を有した第二ナット３１と、前記内螺子部がアジャスター１に螺着して荷重計を既存の支圧板（第一支圧板）との間に挟み込むための挟み込み板３２とを有する（図２）。実施例１の第二ナット３１と挟み込み板３２とは互いに分離すると共に、挟み込み板３２の上に第二ナット３１を載置して組み合わせ使用される。又組み合わせた状態で、挟み込み板３２を固定したまま第二ナット３１のみが軸回転可能としている。 (Pinch nut 3)
The sandwiching nut 3 includes a second nut 31 having an inner screw portion that can be screwed to the outer screw portion of the adjuster 1, and the inner screw portion screwed to the adjuster 1 so that a load meter can be attached to an existing bearing plate (first And a sandwiching plate 32 for sandwiching between them (FIG. 2). The second nut 31 and the sandwiching plate 32 of the first embodiment are separated from each other, and the second nut 31 is placed on the sandwiching plate 32 and used in combination. Further, in the combined state, only the second nut 31 can be rotated while the sandwiching plate 32 is fixed.

挟み込みナット３は少なくとも前記内螺子部及び挟み込み板３２を有していれば良く、例えば他の態様として、第二ナット３１と挟み込み板３２とが一体的に構成されてもよいし、挟みこみ板３２に対して内螺子部が回転可能に組み合わされたものでもよい。またアジャスター１を必要としない場合には、挟み込み板３２の挿通孔３ｈに形成した内螺子によって余長部Ａに直接螺合周着する構成としてもよい。実施例の挟み込みナット３はアジャスター１を介して螺着固定されるため、アンカーの余長部Ａの長さに拘らず確実に設置することができる。 The sandwiching nut 3 only needs to include at least the inner screw portion and the sandwiching plate 32. For example, as another embodiment, the second nut 31 and the sandwiching plate 32 may be integrally formed, or the sandwiching plate A combination of the inner screw portion 32 and the inner screw portion 32 may be possible. Further, when the adjuster 1 is not required, a configuration in which the adjuster 1 is directly screwed and attached to the extra length portion A by an internal screw formed in the insertion hole 3h of the sandwiching plate 32 may be employed. Since the pinching nut 3 of the embodiment is screwed and fixed via the adjuster 1, it can be reliably installed regardless of the length of the extra length portion A of the anchor.

第二ナット３１は、前記挿通孔３ｈよりも大きい断面形状からなり、アジャスター１の上部の棒状の先端部１２に螺合する内螺子部３１０を有してこれにより余長部Ａを間接的に固定する。他の態様として、アジャスター１を介さずに余長部Ａを直接的に固定するものでもよい。実施例では挟み込み板３２の上に載置することで設置されるが、挟み込み板３２と一体的に形成されてもよい。 The second nut 31 has a cross-sectional shape larger than that of the insertion hole 3h, and has an inner screw portion 310 that is screwed to the rod-like tip portion 12 at the top of the adjuster 1, thereby indirectly connecting the extra length portion A. Fix it. As another aspect, the extra length A may be directly fixed without using the adjuster 1. In the embodiment, it is installed by being placed on the sandwiching plate 32, but it may be formed integrally with the sandwiching plate 32.

挟み込み板３２は、荷重計２の筒端面形状を含む大きさの板体からなり、板面の略中央位置に、アジャスター１が遊挿しうる挿通孔３ｈが平面視中央位置に縦方向に貫通形成され、挟み込みナット３全体の下部に配置される。なお挟み込み板３２の下面には荷重計２の上端面が安定して接するための当接窪み３２ｔが形成される（図２）。 The sandwiching plate 32 is a plate having a size including the shape of the cylinder end surface of the load meter 2, and an insertion hole 3 h into which the adjuster 1 can be loosely inserted is formed at a substantially central position on the plate surface so as to penetrate vertically in the center position in plan view. And is disposed at the lower part of the entire sandwiching nut 3. An abutting recess 32t is formed on the lower surface of the sandwiching plate 32 so that the upper end surface of the load meter 2 is in stable contact (FIG. 2).

（ジャッキ４）
ジャッキ４は、挟み込みナット３が螺着したアジャスター１の先端部に固定されてアジャスター１を軸方向地表側へジャッキアップする。実施例ではアジャスター１の先端部１２の外螺子部に螺着する柱状のシリンダ４１と、シリンダ４１の周囲を囲って油圧によりシリンダ４１を上方に引き揚げるジャッキ保持部４２と、挟み込み板３２上に立設してジャッキ保持部４２を下部から支える支持脚４０と、シリンダ４１のジャッキ保持部４２からの突出先端に周着してジャッキ保持部４２の上面に当接し、シリンダ４１の下方移動を制限するシリンダ位置制限ナット４３とから構成される。 (Jack 4)
The jack 4 is fixed to the tip of the adjuster 1 to which the pinching nut 3 is screwed, and jacks up the adjuster 1 to the surface side in the axial direction. In the embodiment, a columnar cylinder 41 that is screwed onto an external screw portion of the tip end portion 12 of the adjuster 1, a jack holding portion 42 that surrounds the cylinder 41 and lifts the cylinder 41 upward by hydraulic pressure, and a sandwiching plate 32. The support leg 40 is provided to support the jack holding portion 42 from below, and the tip of the cylinder 41 protrudes from the jack holding portion 42 and comes into contact with the upper surface of the jack holding portion 42 to restrict the downward movement of the cylinder 41. And a cylinder position limiting nut 43.

（ベース材５）
また実施例１のアンカー荷重計着脱システムにおいては、アンカー荷重計着脱ユニットの一構成として更に、支圧板Ｐと荷重計２との間に介設されるベース材５を具備する。このベース材５は、荷重計載置工程（ｂ）のうち第一ステップであるベース材５載置ステップにて支圧板Ｐ上に載置される（図３（ｂ１））。ベース材５の平面視中央位置の厚さ方向（縦方向）には貫通孔５ｈが貫通形成され、この貫通孔５ｈは余長部Ａを挿通しうる大きさである。図３に示すベース材５載置ステップ（ｂ１）では、このベース材５の貫通孔５ｈによって、アンカーの余長部Ａを囲うようにベース材５が載置される。 (Base material 5)
In the anchor load meter attaching / detaching system according to the first embodiment, the anchor load meter attaching / detaching unit further includes a base member 5 interposed between the bearing plate P and the load meter 2. The base material 5 is placed on the support plate P in the base material 5 placement step which is the first step in the load meter placement step (b) (FIG. 3 (b1)). A through hole 5h is formed in the thickness direction (longitudinal direction) at the center position of the base material 5 in plan view, and the through hole 5h is sized to allow the extra length portion A to be inserted therethrough. In the base material 5 placement step (b1) shown in FIG. 3, the base material 5 is placed so as to surround the surplus length portion A of the anchor by the through hole 5h of the base material 5.

さらに言えばこのベース材５は、側面から挿通孔までを側方に貫通した側方窓５Ｗを有してなり、この側方窓５ｗによって、定着部（ＥまたはＮ）の余長部Ａへの定着位置を上方へ調節しうることが好ましい。
設置後の状態において支圧板Ｐと荷重計２との間にベース材５が挟設されており、その側方窓５ｗから、余長部Ａに取り付けられた定着部を操作して、前記定着部緩動工程（ｅ３）を容易に行うことができる。 Furthermore, the base material 5 has a side window 5W penetrating laterally from the side surface to the insertion hole, and the side window 5w leads to the extra length portion A of the fixing portion (E or N). It is preferable that the fixing position can be adjusted upward.
In the state after installation, the base material 5 is sandwiched between the pressure plate P and the load meter 2, and the fixing unit attached to the extra length portion A is operated from the side window 5 w to fix the fixing. The partial loosening step (e3) can be easily performed.

（第二ナット３１）
挟み込みナット３のうち第二ナット３１は、アジャスター１の先端部に螺着することで、アジャスター１を介して余長部Ａを間接的に固定する。また挟み込みナット３のうち挟み込み板３２は中央に挿通孔３ｈを有しており、設置後には余長部Ａやアジャスター１がこの挿通孔３ｈを挿通した状態となる。 (Second nut 31)
The second nut 31 of the sandwiching nut 3 is screwed to the tip of the adjuster 1 to indirectly fix the surplus length portion A via the adjuster 1. Further, the sandwiching plate 32 of the sandwiching nut 3 has an insertion hole 3h in the center, and after installation, the extra length portion A and the adjuster 1 are inserted through the insertion hole 3h.

このようなものであれば、アジャスター１がアンカーの余長部Ａへ周着した状態で、その周りに載置された荷重計２と非接触な状態を保つことができる。また周囲に立設された荷重計２よりもアジャスター１の先端部１２が上方へ突出するものであり、この突出した先端部１２に挟み込みナット３１が螺着されることで、前記挟み込み板３２が、載置された荷重計２を地表側に挟み込んだ状態となり得る。既存の支圧板や定着部を取り外すことなく、荷重計２を地表側に挟み込んだ状態で、挟み込み板を有した挟み込みナット３が、既存の支圧板や定着部に代わって支圧機能や定着機能を果たすこととなる。 If it is such, it can maintain a non-contact state with the load meter 2 mounted in the circumference | surroundings in the state in which the adjuster 1 was attached to the surplus length part A of an anchor. Further, the tip portion 12 of the adjuster 1 protrudes upward from the load meter 2 erected around the periphery, and a pinching nut 31 is screwed onto the protruding tip portion 12 so that the pinching plate 32 is formed. The loaded load cell 2 can be sandwiched between the ground surfaces. Without removing the existing bearing plate and fixing part, the pinch nut 3 with the sandwiching plate is inserted in the state where the load cell 2 is sandwiched on the ground surface side, instead of the existing bearing plate and fixing part. Will be fulfilled.

（アンカーへの荷重計着脱方法）
本実施例のアンカーへの荷重計着脱方法は、既設のアンカーの余長部Ａに荷重計を設置するための方法であって、上記アンカー荷重計着脱ユニットと荷重計２とジャッキ４とによって下記工程を順に具備する（図３、図４、図５）。
・アジャスター１の棒状の基端部１１をアンカーの余長部Ａへ周着させるアジャスター１周着工程（ａ）
・周着させたアジャスター１の周囲に荷重計２を載置して、アジャスター１を、挿通孔と非接触の状態で囲う状態にする荷重計載置工程（ｂ）
・周着させたアジャスター１の先端部に挟み込みナット３を周着して棒状の基端部１１側の所定の螺進位置まで螺進させ、載置した荷重計２の上部を覆って地表側に挟み込む第一挟み込み工程（ｃ）
・アジャスター１の先端部にジャッキ４のシリンダ４１を周着させ、支持脚４０を介してジャッキ保持部４２を挟み込み板上に取り付け、シリンダ４１の突出部にシリンダ位置制限ナット４３を固定することでジャッキ４を取り付けるジャッキ取り付け工程（ｄ）
・周着された余長部Ａ及び挟み込みナット３と共にアジャスター１を地表側に引揚げてジャッキアップする引揚げ工程（ｅ１）
・所定の位置に螺合された挟み込みナット３を、さらに基端側の螺進位置まで螺進させ、ジャッキアップによって余長部Ａが地表側へ引き上げられた状態で荷重計２を地表側に挟み込む第二挟み込み工程（ｅ２）
・余長部Ａと共に地表側に引揚げられた定着部を、アンカーの余長部Ａ側へ上方移動させて支圧板から離間するように緩動させる定着部緩動工程（ｅ３）
・ジャッキ４の引揚げを解除する引揚げ解除工程（ｅ４）
・ジャッキ４をアジャスター１から取り外す取り外し工程（ｆ） (Load meter attachment to anchor)
The load meter attaching / detaching method to / from the anchor of the present embodiment is a method for installing a load meter in the extra length portion A of the existing anchor. The anchor load meter attaching / detaching unit, the load meter 2 and the jack 4 Steps are provided in order (FIGS. 3, 4, and 5).
・ Adjuster 1 circumference attaching step (a) for attaching the rod-like base end portion 11 of the adjuster 1 to the extra length portion A of the anchor
A load meter placing step (b) in which the load meter 2 is placed around the adjuster 1 that is put on the circumference, and the adjuster 1 is enclosed in a non-contact state with the insertion hole.
・ Put the nut 3 around the tip of the adjuster 1 that has been put around and screw it to the predetermined screwing position on the rod-like base end 11 side, covering the top of the loaded load meter 2 and the ground surface side First sandwiching step (c)
By attaching the cylinder 41 of the jack 4 around the tip of the adjuster 1, sandwiching the jack holding portion 42 via the support leg 40 and mounting it on the plate, and fixing the cylinder position limiting nut 43 to the protruding portion of the cylinder 41 Jack mounting step for mounting the jack 4 (d)
-Lifting step (e1) in which the adjuster 1 is lifted to the surface side and jacked up together with the extra portion A and the sandwiching nut 3
-The clamping nut 3 screwed into a predetermined position is further screwed up to the screwing position on the base end side, and the load meter 2 is moved to the ground side in a state where the extra length portion A is pulled up to the ground side by jack-up. 2nd pinching process to pinch (e2)
A fixing unit slowing step (e3) in which the fixing portion lifted to the surface side together with the surplus length portion A is moved upward toward the surplus length portion A side of the anchor so as to be separated from the bearing plate.
-Lifting release step (e4) for releasing lifting of jack 4
-Removal process of removing the jack 4 from the adjuster 1 (f)

本方法においては先ず、アジャスター１周着工程（ａ）によって、余長部Ａにアジャスター１の基端部１１をアンカーの余長部Ａへ周着させ、アジャスター１周着状態Ｓ１とする。次に、荷重計載置工程（ｂ）のうち第一ステップであるベース材５載置ステップによって、ベース材５を必要枚数だけ支圧板Ｐ上に載置する（ｂ１）。このベース材５載置ステップ（ｂ１）の後は、荷重計載置工程（ｂ）のうち第二ステップである荷重計２載置ステップにて荷重計２を支圧板Ｐ上に載置する（図３（ｂ１））。ここで荷重計２はセンターホール２ｈを有しており、このベース材５の上にて、センターホール２ｈによって、余長部Ａを囲うように荷重計２が支圧板Ｐと挟み込み板３との間に載置される。この状態が荷重計載置状態Ｓ２である（図３）。これによってベース材５は支圧板Ｐと荷重計２との間に挟接された状態とされる。 In this method, first, the base end portion 11 of the adjuster 1 is attached to the surplus length portion A to the surplus length portion A of the anchor by the adjuster 1 perimeter attachment step (a), thereby obtaining the adjuster 1 peripheral attachment state S1. Next, the base material 5 is placed on the bearing plate P by a necessary number by the base material 5 placing step which is the first step in the load meter placing step (b) (b1). After this base material 5 placing step (b1), the load cell 2 is placed on the bearing plate P in the load meter 2 placing step which is the second step in the load meter placing step (b) ( FIG. 3 (b1)). Here, the load cell 2 has a center hole 2h, and the load cell 2 is placed between the bearing plate P and the sandwiching plate 3 on the base material 5 so as to surround the surplus length portion A by the center hole 2h. Placed in between. This state is the load cell mounting state S2 (FIG. 3). As a result, the base material 5 is sandwiched between the bearing plate P and the load cell 2.

ベース材５載置ステップの後は、第一挟み込み工程（ｃ）を行う。ここで第一挟み込み工程（ｃ）は、挟み込み板３２載置ステップｃ１と、挟み込みナット３取り付けステップｃ２とからなる。先ず第一挟み込み工程（ｃ）のうち第一ステップである挟み込み板３２取り付けステップ（ｃ１）により、挟み込み板３２が荷重計２の上に載置される。このとき図６に示すように、挟み込み板３２の挿通孔３ｈ内に、アジャスター１の外螺子部１２が非接触で遊挿されるものとしてもよい。 After the base material 5 placing step, the first sandwiching step (c) is performed. Here, the first pinching step (c) includes a pinching plate 32 placement step c1 and a pinching nut 3 attachment step c2. First, the sandwiching plate 32 is placed on the load meter 2 by the sandwiching plate 32 mounting step (c1) which is the first step in the first sandwiching step (c). At this time, as shown in FIG. 6, the outer screw portion 12 of the adjuster 1 may be loosely inserted into the insertion hole 3 h of the sandwiching plate 32 in a non-contact manner.

挟み込み板３２取り付けステップ（ｃ１）の後は、第一挟み込み工程（ｃ）のうち第二ステップである第二ナット３１取り付けステップ（ｃ２）により、第二ナット３２をアジャスター１の外螺子部１２の所定の位置まで螺合させ、かつ挟み込み板３２の上に載置する。これにより設置後の状態では支圧板Ｐ上にはベース材５が載置されてその上に荷重計２が立設し、荷重計２上の挟み込みナット３が新たな定着機能具となって余長部Ａを保持した第一挟み込み状態Ｓ３となる（図３）。 After the sandwiching plate 32 mounting step (c1), the second nut 32 is attached to the outer screw portion 12 of the adjuster 1 by the second nut 31 mounting step (c2) which is the second step in the first sandwiching step (c). It is screwed to a predetermined position and placed on the sandwiching plate 32. Thus, in the state after installation, the base material 5 is placed on the bearing plate P, and the load meter 2 is erected thereon, and the pinching nut 3 on the load meter 2 becomes a new fixing function tool. It will be in the 1st pinching state S3 which hold | maintained the long part A (FIG. 3).

次にアジャスター１の先端部にジャッキ４のシリンダ４１を周着させ、支持脚４０を介してジャッキ保持部４２を挟み込み板上に取り付け、シリンダ４１の突出部にシリンダ位置制限ナット４３を固定することでジャッキ４を取り付けるジャッキ取り付け工程（ｄ）を行う。ジャッキ取り付け工程（ｄ）は、支持脚４０を取り付ける支持脚４０取り付けステップｄ１と、シリンダ４１をアジャスター１に螺合させてその外側へジャッキ保持部４２を挿通するジャッキ保持部取り付けステップｄ２と、シリンダ位置制限ナット４３を上部突出したシリンダ４１に螺合させるシリンダ位置制限ステップｄ３とからなる。こうして引き揚げ前設置状態Ｓ４となる。 Next, the cylinder 41 of the jack 4 is circumferentially attached to the tip of the adjuster 1, the jack holding portion 42 is sandwiched via the support legs 40 and attached on the plate, and the cylinder position limiting nut 43 is fixed to the protruding portion of the cylinder 41. The jack attaching step (d) for attaching the jack 4 is performed. The jack attachment step (d) includes a support leg 40 attachment step d1 for attaching the support leg 40, a jack holding portion attachment step d2 for screwing the cylinder 41 into the adjuster 1 and inserting the jack holding portion 42 to the outside, and a cylinder. And a cylinder position limiting step d3 for screwing the position limiting nut 43 into the cylinder 41 protruding upward. Thus, the pre-lifting installation state S4 is obtained.

その後、周着された余長部及び挟み込みナット３と共にアジャスター１を、所定のジャッキアップ量だけ地表側に引揚げてジャッキアップする引揚げ工程（ｅ１）を行い、続けて、ジャッキアップによって所定位置Ｈまで上方移動したシリンダ４１に対して、シリンダ位置制限ナット４３を下方に螺進させ、ジャッキ保持部４２の上面に当接させるシリンダ位置調整ステップ（図５のｅ２）を行う。また引揚げ工程（ｅ１）の後であってシリンダ位置調整ステップ（図５のｅ２）の前後いずれかにおいて、アジャスター１と共に引き揚げられた第二ナット３１を、挟み込み板３２側すなわちさらに基端側の螺進位置まで螺進させ、ジャッキアップによって余長部が地表側へ引き上げられた状態で荷重計２を地表側に挟み込む第二挟み込み工程（ｅ２）を行う。このとき余長部Ａ及び定着部Ｎはジャッキアップ量だけ地表側へ引き揚げられた位置Ｈのままとなっている。 After that, a lifting step (e1) is performed in which the adjuster 1 is lifted to the ground surface side by a predetermined jack-up amount together with the extra length portion and the pinching nut 3 that are circumferentially mounted, and then the predetermined position is reached by jack-up. A cylinder position adjusting step (e2 in FIG. 5) is performed in which the cylinder position limiting nut 43 is screwed downward and brought into contact with the upper surface of the jack holding portion 42 with respect to the cylinder 41 moved upward to H. Further, after the lifting step (e1) and before or after the cylinder position adjustment step (e2 in FIG. 5), the second nut 31 lifted together with the adjuster 1 is placed on the sandwiching plate 32 side, that is, further on the proximal side. The second pinching step (e2) is performed in which the load meter 2 is pinched to the ground side in a state where the screw is screwed up to the screw position and the extra length portion is pulled up to the ground side by jacking up. At this time, the extra length portion A and the fixing portion N remain at the position H pulled up to the surface side by the jack-up amount.

そして次に、余長部Ａと共に地表側に引揚げられた定着部Ｎを、アンカーの余長部Ａ側へ上方移動させて支圧板から離間するように緩動させる定着部緩動工程（ｅ３）を経て、設置後の定着部緩動状態Ｓ５（図６）となる。 Then, the fixing portion slowing step (e3) in which the fixing portion N lifted to the ground surface side together with the surplus length portion A is moved upward toward the surplus length portion A side of the anchor so as to be separated from the bearing plate. ), The fixing unit slowly moves after installation (S5 (FIG. 6)).

（定着部緩動工程ｅ３）
定着部緩動工程（ｅ３）は、第二挟み込み工程の後であって取り外し工程（ｆ）の前に、余長部Ａと共に地表側に引揚げられ、ジャッキアップ量だけ浮いた位置Ｈにある定着部を、アンカーの余長部Ａ側へ上方移動させ、定着部Ｎと支圧板Ｐとの間に離間距離Ｎｄを設ける工程である。これはすなわち、定着部（第一ナット）を支圧板よりも上方へ移動させて緩める工程を具備したものである。このようにすると、元の定着部による地中への支圧状態を確実に回避することで、支圧板上に新たに立設した荷重計２及びこれを挟み込む挟み込みナット３が、アジャスター１を介してアンカーの全ての緊張力を支承することとなる。実施例１では定着部Ｎを、その上面がアジャスター１の基端部１１の下面と当接する位置Ｈ２まで上方移動させている（図６）。これによりアジャスター１の余長部Ａの螺合周着を安定した状態に保持することが出来、荷重計２において残存緊張力を確実に測定することができる。ただし本工程は本発明に必須の工程ではない。 (Fixing section slow movement process e3)
The fixing portion slow-moving step (e3) is at the position H that is lifted to the ground surface side together with the extra length portion A after the second sandwiching step and before the removing step (f), and is lifted by the jack-up amount. In this step, the fixing portion is moved upward toward the extra length portion A of the anchor, and a separation distance Nd is provided between the fixing portion N and the bearing plate P. In other words, this includes a step of loosening the fixing portion (first nut) by moving it upward from the bearing plate. In this manner, the load meter 2 newly installed on the bearing plate and the sandwiching nut 3 that sandwiches the load meter 2 are surely avoided via the adjuster 1 by reliably avoiding the state of bearing pressure to the ground by the original fixing unit. Will support all the tension of the anchor. In the first exemplary embodiment, the fixing unit N is moved upward to a position H2 where the upper surface is in contact with the lower surface of the base end portion 11 of the adjuster 1 (FIG. 6). Thereby, the screwing circumference of the extra length part A of the adjuster 1 can be held in a stable state, and the residual tension force can be reliably measured by the load meter 2. However, this step is not an essential step in the present invention.

ここで実施例１のベース材５は四隅がカットされた平面視隅取り正方形の略立方体形状として一体的に形成された、扁平の立方体形からなる（図１）。このベース材５は、上下面を縦方向に貫通する第一ナットよりも大きい貫通孔５ｈが設けられると共に、向かい合う側面の中央部に横長矩形孔からなる側方窓５ｗがそれぞれ形成される。側方窓５ｗは、ベース材５の側面中央部からこの貫通孔に向かって側方へ貫通する。定着部緩動工程において、２つの側方窓５ｗの少なくとも一方の外方から貫通孔５ｈ側へアーム状のナット緩動具を差し入れて第一ナットを緩める。 Here, the base material 5 of Example 1 has a flat cubic shape integrally formed as a substantially cubic shape with a square in a plan view with four corners cut (FIG. 1). The base material 5 is provided with a through hole 5h larger than the first nut penetrating the top and bottom surfaces in the vertical direction, and a side window 5w made of a horizontally long rectangular hole is formed at the center of the opposite side surfaces. The side window 5w penetrates laterally from the center of the side surface of the base material 5 toward the through hole. In the fixing portion loosening step, an arm-like nut loosening tool is inserted from the outside of at least one of the two side windows 5w to the through hole 5h side to loosen the first nut.

（設置後の定着部緩動状態（図６））
設置後は、支圧板上の余長部Ａの先にアジャスター１が周着固定され、その周りを囲って筒状の荷重計２が立設され、前記アジャスター１の上部の先端部に螺着された挟み込みナット３が前記荷重計２を上部から支圧板との間に挟み込んだ状態となる。この状態では、アジャスター１の先端部１２が、軸方向に沿って荷重計２の設置高さよりも上方まで延伸して挟み込みナット３の挿通孔３ｈと螺合される。また荷重計２のセンターホール２内には余長部Ａ及びアジャスターを挿通させており、荷重計２が、支圧板Ｐ上に載置されたベース材５の上に立設している。そして挟み込みナット３の挟み込み板３２が、その下部に当接させた荷重計２を支圧板Ｐとの間に挟み込んでいる。設置途中の引揚げ工程ｅ１によって余長部Ａがジャッキ４によって引き上げられることで、設置後の状態では余長部Ａに取り付けられた定着部が支圧板Ｐから離間し、支圧板Ｐ上には荷重計２が立設してその上の挟み込みナット３が新たな定着機能具となって余長部Ａを保持する。つまり設置前にアンカーを地表定着していた定着具に代えて、前記アジャスター１、荷重計２及び挟み込みナット３によってアンカーを地表定着するものとなっている。なお引揚げ工程ｅ１を経て設置されたものであるため、既設のアンカーの緊張状態をチェックし、緩んでいる場合には再緊張の工程を荷重計設置と併せて行うことができる。 (Fixed part slowly moving after installation (Fig. 6))
After installation, the adjuster 1 is attached and fixed to the tip of the extra length A on the bearing plate, and a cylindrical load meter 2 is erected around the periphery of the adjuster 1 and screwed to the top end of the adjuster 1. The sandwiched nut 3 is in a state in which the load meter 2 is sandwiched between the load bearing plate and the support plate from above. In this state, the tip 12 of the adjuster 1 extends to the upper side of the load meter 2 along the axial direction and is screwed into the insertion hole 3 h of the pinching nut 3. Further, the surplus length portion A and the adjuster are inserted into the center hole 2 of the load meter 2, and the load meter 2 is erected on the base material 5 placed on the bearing plate P. The sandwiching plate 32 of the sandwiching nut 3 sandwiches the load cell 2 brought into contact with the lower portion thereof with the bearing plate P. The surplus length A is lifted by the jack 4 in the lifting process e1 during the installation, so that the fixing portion attached to the surplus length A is separated from the bearing plate P in the state after the installation. The load meter 2 is erected, and the pinching nut 3 on the load meter 2 becomes a new fixing function tool and holds the extra length portion A. That is, the anchor is fixed to the ground by the adjuster 1, the load meter 2 and the pinching nut 3 in place of the fixing tool that fixes the anchor to the ground before installation. In addition, since it installed through the lifting process e1, the tension | tensile_strength state of the existing anchor is checked, and when it is loose, the process of re-tensioning can be performed with load meter installation.

図７に示す実施例２のベース材５は平面視隅取り正方形の略立方体形状として一体的に形成された、扁平の立方体形からなる（図１）。このベース材５は、上下面を縦方向に貫通する第一ナットよりも大きい貫通孔５ｈが設けられると共に、向かい合う側面に横向き略コ字状孔からなる側方窓５ｗがそれぞれ形成される。側方窓５ｗは、中央部からこの貫通孔に向かって側方へ貫通する。ただし側方窓５ｗは上方又は下方のいずれかに解放しており、定着部緩動工程において、２つのベース材５を互いに反対向きに対向させて２つの側方窓５ｗが向かい合うように組み合わせてベース材５を配置する（図７）。 The base material 5 of Example 2 shown in FIG. 7 consists of a flat cube shape integrally formed as a substantially cubic shape having a square shape in plan view (FIG. 1). The base member 5 is provided with a through hole 5h larger than the first nut penetrating the upper and lower surfaces in the vertical direction, and side windows 5w each formed of a laterally substantially U-shaped hole are formed on opposite side surfaces. The side window 5w penetrates laterally from the central part toward the through hole. However, the side window 5w is opened to either the upper side or the lower side, and in the fixing part slowing step, the two base materials 5 are opposed to each other and are combined so that the two side windows 5w face each other. The base material 5 is disposed (FIG. 7).

図８，９に示す実施例３のベース材５は円環形の上板５１、下板５２の間に複数の高さ調節用の柱体５３が挟まれてなる。上板５１、下板５２は互いに同一形状であって、荷重計２が立設しうる大きさの円板からなり、同軸中央に貫通孔５ｈが設けられる。複数の高さ調節用の柱体５３はいずれも等しい高さの４本の円柱枠体であり、平面視にて上板５１、下板５２の外周寄りの４箇所に等間隔に設けられ、上板５１と下板５２の間に挟まれ、それぞれの中心位置にてボルト５ｐで固定される。各柱体５３間の隙間が水抜き用、兼定着部緩動工程の作業用の側方窓５ｗとなっている。この高さ調節用の柱体５３が上板５１、下板５２とボルト固定により分離可能に構成されることで、コンパクトな形態で運搬でき、製作コストも低減可能となる。 The base material 5 of the third embodiment shown in FIGS. 8 and 9 is formed by sandwiching a plurality of height adjusting columns 53 between an annular upper plate 51 and a lower plate 52. The upper plate 51 and the lower plate 52 have the same shape and are made of a disc having a size that allows the load cell 2 to stand, and a through hole 5h is provided in the center of the same axis. The plurality of height adjusting column bodies 53 are all four cylindrical frame bodies having the same height, and are provided at four equal intervals near the outer periphery of the upper plate 51 and the lower plate 52 in a plan view, It is sandwiched between the upper plate 51 and the lower plate 52 and fixed with bolts 5p at the respective center positions. A gap between the column bodies 53 serves as a side window 5w for draining water and for working in the slow fixing step. Since the column body 53 for height adjustment is configured to be separable by fixing the upper plate 51 and the lower plate 52 with bolts, it can be transported in a compact form and the manufacturing cost can be reduced.

図１０に示す実施例４のベース材５は前記実施例２と同様の構成からなる。ベース材５の使用数、組み合わせ数によって高さを調整することができる。また実施例４は楔タイプの余長部Ａに取り付けるために、ロッドＲが挿通する挿通孔６ｈが縦方向に複数配置形成されたプリングヘッド６を使用する。プリングヘッド６はロッドＲを挿通したのちに楔具６ＷでロッドＲの抜け止めを行う。 A base material 5 of Example 4 shown in FIG. 10 has the same configuration as that of Example 2. The height can be adjusted by the number of base materials 5 used and the number of combinations. Further, the fourth embodiment uses a pulling head 6 in which a plurality of insertion holes 6h through which the rod R is inserted are formed in the longitudinal direction in order to attach to the wedge-type surplus length portion A. After inserting the rod R, the pulling head 6 prevents the rod R from coming off with the wedge 6W.

（楔定着の場合（実施例４））
アンカーの定着方式として、緊張させた地表部に外螺子を形成し、この外螺子にナット式の定着部を定着させるナット定着方式のほか、緊張させたテンドンワイヤー（鋼線）を孔あき円柱状の定着部Ｅに挿通させ、挿通させた定着部Ｅの孔とテンドンワイヤーの隙間に楔定着部Ｗを打ち込んで定着する楔定着方式が存在する。実施例４は楔定着方式の場合を特定したものである。本実施例においては、アンカーの余長部Ａが、くさび定着部よりも上方へ突出する複数本のテンドンワイヤーＲからなり、アンカーの地表定着部が、前記複数本のテンドンワイヤーＲをそれぞれ楔定着部Ｗによって楔定着したものである（図１０）。 (In the case of wedge fixing (Example 4))
In addition to the nut fixing method in which an external screw is formed on the tensioned ground surface and a nut type fixing part is fixed to the external screw as a fixing method of the anchor, a tendon wire (steel wire) that has been tensioned is a perforated cylindrical shape. There is a wedge fixing method in which the fixing unit E is inserted into the fixing unit E and the wedge fixing unit W is driven into the gap between the inserted fixing unit E and the tendon wire and fixed. Example 4 specifies the case of the wedge fixing method. In this embodiment, the extra length portion A of the anchor is composed of a plurality of tendon wires R protruding upward from the wedge fixing portion, and the ground fixing portion of the anchor wedge-fixes the plurality of tendon wires R respectively. The wedge is fixed by the portion W (FIG. 10).

実施例４のアンカー荷重計着脱システムは、余長部Ａまたは定着部（Ｅ／Ｎ）に固定されると共に外螺子部を有するプリングヘッド６を具備し、プリングヘッド６の外螺子部はアジャスター１と螺合する。このときアジャスター１は、余長部Ａ又は定着部に固定されたプリングヘッド６を介して余長部Ａへ周着するものとなっている（図１０）。 The anchor load meter attaching / detaching system according to the fourth embodiment includes a pulling head 6 that is fixed to the surplus length portion A or the fixing portion (E / N) and has an external screw portion. The external screw portion of the pulling head 6 is the adjuster 1. Screwed together. At this time, the adjuster 1 is attached to the surplus length portion A via the pulling head 6 fixed to the surplus length portion A or the fixing portion (FIG. 10).

また実施例４では、前記荷重計の設置方法の各工程のうち、アジャスター１周着工程が、余長部Ａの複数本のテンドンワイヤーＲを、外螺子部を設けた略円柱状のプリングヘッド６によってまとめて楔固定する楔固定ステップと、
楔固定したプリングヘッド６の外螺子部にアジャスター１の棒状の基端部１１の内螺子部を螺合して周着させる螺合ステップとからなる。 In the fourth embodiment, among the steps of the load meter installation method, the adjuster 1-around process includes a plurality of tendon wires R having an extra length A and a substantially cylindrical pulling head provided with an external screw portion. A wedge fixing step for fixing the wedge together by 6;
This comprises a screwing step in which the inner screw portion of the rod-like base end portion 11 of the adjuster 1 is screwed onto the outer screw portion of the pulling head 6 fixed to the wedge and is circumferentially attached.

上記はアンカーが楔定着方式の場合の設置方法であり、実施例１〜３の設置方法に、外螺子部を設けたプリングヘッド６を取り付けるステップを追加したものとなっている。 The above is an installation method in the case where the anchor is a wedge fixing system, and the step of attaching the pulling head 6 provided with the external screw portion is added to the installation methods of the first to third embodiments.

その他本発明は上述した実施例に限定されず、本発明の趣旨を逸脱しない範囲で種々の変形、要素抽出、実施例間での各要素の組み合わせ、一部要素の省略、工程の順番変更、形態の変更等が可能である。 In addition, the present invention is not limited to the above-described embodiments, and various modifications, element extraction, combinations of elements between the embodiments, omission of some elements, change of the order of steps, without departing from the spirit of the present invention, It is possible to change the form.

１アジャスター
１１基端部
１２先端部
２荷重計
２ｈセンターホール
３挟み込みナット
３１第二ナット
３２挟み込み板
３ｈ挿通孔
４ジャッキ
５ベース材
５ｗ側方窓
６プリングヘッド
Ｐ支圧板（第一支圧板） DESCRIPTION OF SYMBOLS 1 Adjuster 11 Base end part 12 Tip part 2 Load meter 2h Center hole 3 Clamping nut 31 Second nut 32 Clamping plate 3h Insertion hole 4 Jack 5 Base material 5w Side window 6 Pulling head P Bearing plate (first bearing plate)

Claims

A load meter installation set in which a load meter is additionally installed on the extra length portion of the anchor fixed with the fixing portion (E / N) attached on the bearing plate (P),
A load cell (2) placed around the surplus length portion, a pinch nut (3) attached indirectly or directly to the tip side of the surplus length portion, a pinch nut (3) and a fixing portion (E / N) and a jack (4) for lifting the extra length part to the ground surface and jacking up,
The sandwiching nut (3) is provided so as to extend around the second nut (31) and the second nut (31) that indirectly or directly fix the surplus length portion by its own internal screw portion (310). A sandwiched plate (32),
With the jack (4) installed above or above the sandwich plate (32), the extra length is lifted to the ground surface side, and the fixing portion (E / N) is separated from the bearing plate (P). ,
In this separated state, the lower surface of the sandwiching plate (32) is brought into contact with the upper surface of the load meter (2) placed above, and the load meter (2) is sandwiched between the bearing plate (P). Anchor load cell attaching / detaching system.

An adjuster (1) that extends around the surplus portion and extends the tip structure of the surplus portion upward in the axial direction,
The anchor load meter attaching / detaching system according to claim 1, wherein the sandwiching nut (3) is indirectly attached to a distal end side of the surplus length portion via an adjuster (1) attached to the surplus length portion.

A pulling head (6) fixed to the extra length portion or the fixing portion (E / N) and having an external screw portion;
The adjuster (1) has an inner screw portion that is screwed with an outer screw portion of the pulling head (6), and is wound around the extra length portion via the pulling head (6) fixed to the extra length portion or the fixing portion. The anchor load cell attaching / detaching system according to claim 2, which is worn.

Comprising a base material (5) sandwiched between the bearing plate (P) and the load cell (2) around the surplus portion;
The base material (5) has a side window 5W for moving the fixing tool (E / N) around the surplus part lifted to the surface side to move upward. Anchor load cell attachment / detachment system.

A co-installation set that is installed together when a load meter is additionally installed on an extra length portion of an existing anchor that is fixed by attaching a fixing portion (E / N) on a support plate (P),
A cylindrical load cell (2) that can be placed around the surplus part, and a pinching nut (3) that can be attached indirectly or directly to the distal end of the surplus part,
The sandwiching nut (3) extends around the second nut (31) and the second nut (31) which can indirectly or directly fix the surplus length portion by its own internal screw portion (310). A load cell (2) having a sandwiching plate (32) provided and a lower surface of the sandwiching plate (32) placed in a state where the fixing portion (E / N) is separated from the bearing plate (P). An anchor load meter co-installation set characterized in that the load meter (2) can be sandwiched between the pressure plate (P) in contact with the upper surface of the load plate.

In order to additionally install a cylindrical load cell (2) having a center hole (2h) on an existing anchor fixed on the ground surface by attaching a fixing tool to the extra length protruding on the bearing plate (P) An anchor load meter attaching / detaching unit of
While having an adjuster (1) for circumferentially attaching to the extra length portion of the anchor and extending the tip structure of the extra length portion in the axial direction, and a sandwiching plate (32) having a size including the end face shape of the load cell (2) A pinch nut (3) that can be screwed onto the tip of the adjuster (1);
Insert the extra length and adjuster (1) into the center hole (2h) of the load cell (2), and place the load cell (2) upright on the bearing plate (P). The portion (12) extends along the axial direction to a position higher than the installation height of the load meter (2), and the load meter (2) in which the sandwich plate (32) of the sandwich nut (3) is in contact with the lower portion thereof ) Between the pressure plate (P) and the fixing tool is separated from the pressure plate (P).

A load meter (2) that can be inserted through the surplus length portion protruding above the ground surface portion of the anchor anchor, and a pinching nut (3) that can be directly or indirectly attached to the tip side of the surplus length portion; The load meter is installed on the surplus length of the existing anchor by the load meter installation set consisting of the jack (4) that is fixed to the further side of the surplus length where the pinching nut (3) is attached and jacks up the surplus length. A load meter installation method for an anchor to be additionally installed,
A load meter placing step (b) for placing the load meter (2) around the surplus length portion of the anchor so as to surround the surplus length portion, and a pinching nut from the front side of the circumferential length surplus portion A first clamping step in which (3) is attached and screwed to a predetermined screwing position on the rod-like base end (11) side, and the upper part of the loaded load meter (2) is covered and pinched on the ground surface side ( c) and a lifting step (e1) in which the jack (4) is fixed to the tip of the surplus length portion, and the surplus length portion is lifted to the ground surface side together with the pinched nuts (3) which are circumferentially worn, and jacked up. The pinching nut (3) is screwed to a screwing position further proximal than the screwing position in the first pinching step (c), and the extra length is lifted to the ground surface side by jacking up To cancel the lifting of the jack (4) and the second clamping step (e2) of clamping the load cell (2) to the ground surface Load meter detachable way to an anchor which is characterized by comprising a removable step (f) removing from the elongated portion.