JP2016037784A - Method for correcting inclination of pneumatic caisson - Google Patents

Method for correcting inclination of pneumatic caisson Download PDF

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JP2016037784A
JP2016037784A JP2014162494A JP2014162494A JP2016037784A JP 2016037784 A JP2016037784 A JP 2016037784A JP 2014162494 A JP2014162494 A JP 2014162494A JP 2014162494 A JP2014162494 A JP 2014162494A JP 2016037784 A JP2016037784 A JP 2016037784A
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caisson
inclination
contact portion
pneumatic
reaction force
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JP6386829B2 (en
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功輔 斉藤
Kosuke Saito
功輔 斉藤
宮地　孝
Takashi Miyaji
孝 宮地
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Taisei Corp
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Abstract

PROBLEM TO BE SOLVED: To provide means which can bring about a great inclination correction effect by a simple structure and which can be taken even on a job site in soft ground and a small-scale job site.SOLUTION: In a method for correcting inclination of a caisson in a pneumatic caisson method, a strut material is arranged between a caisson and a reaction surface facing an outer surface of the caisson, in such a manner as to take an attitude in which an up-grade is set toward the caisson. In sinking of the caisson, the strut material corrects the inclination of the caisson by pushing out the caisson by reaction when an attitude of the strut material is shifted to a horizontal attitude.SELECTED DRAWING: Figure 1

Description

本発明は、ニューマチックケーソン工法においてケーソンの傾斜修正を行う為の傾斜修正方法に関する。   The present invention relates to an inclination correction method for correcting the inclination of a caisson in a pneumatic caisson method.

ニューマチックケーソン工法とは、ケーソンの下部に気密性の作業室を設け、空気圧により湧水を防ぎながら掘削作業を行い、所定の深さまでケーソンを沈設する工法である。
沈設途中に傾斜したケーソンの姿勢を修正する方法としては、（１）重量バランスの調整による修正、（２）掘削での摩擦調整による修正（特許文献１を参照。）、（３）ガイドローラとジャッキの併用による修正、などが知られている。 The pneumatic caisson method is a method in which an airtight working chamber is provided in the lower part of the caisson, excavation work is performed while preventing spring water by air pressure, and the caisson is submerged to a predetermined depth.
As a method of correcting the posture of the caisson inclined during the laying, (1) correction by adjusting the weight balance, (2) correction by adjusting friction during excavation (see Patent Document 1), (3) guide roller Modifications using jacks are known.

特開２０１１−２５６６５２号公報JP 2011-2566652 A

しかし、これら従来の方法では、以下のような問題が考えられる。
（１）重量バランスの調整による修正の場合
本方法は、ケーソン内部に投入する水の重量を調整することによってケーソンの傾斜を修正する。
しかし、規模の小さなケーソンでは、ケーソン内部が掘削のための機材（マンロック、マテリアルロックなど）に占領されており、投入できる水量も限られるため、傾斜修正効果が低く、実用性に乏しい。
（２）掘削での摩擦調整による修正の場合
本方法は、ケーソン直下の掘削箇所の調整（摩擦の調整）によって傾斜修正を行う。
しかし、掘削現場が軟弱地盤の場合には、摩擦調整が非常に難しい。
（３）ガイドローラでの反力調整による修正の場合
本方法は、ケーソンの周囲にガイドローラを固定し、ジャッキを併用してニューマチックケーソンを押すことで、傾斜修正を行う。
しかし、ガイドローラは固定されるため、施工時に障害となる可能性が高い。また、施工時には随時ジャッキ調整を行うために、作業員が監視・管理を行う必要であり、作業負担増に繋がる。また、姿勢制御の効果もさほど高くない。 However, these conventional methods have the following problems.
(1) In the case of correction by adjusting the weight balance In this method, the inclination of the caisson is corrected by adjusting the weight of the water introduced into the caisson.
However, in a small-sized caisson, the caisson is occupied by equipment for excavation (manlock, material lock, etc.), and the amount of water that can be input is limited, so the tilt correction effect is low and the practicality is poor.
(2) In the case of correction by friction adjustment in excavation In this method, the inclination is corrected by adjusting the excavation point (adjustment of friction) immediately below the caisson.
However, when the excavation site is soft ground, friction adjustment is very difficult.
(3) In the case of correction by adjusting the reaction force on the guide roller In this method, the guide roller is fixed around the caisson and the inclination is corrected by pushing the pneumatic caisson together with the jack.
However, since the guide roller is fixed, there is a high possibility that it becomes an obstacle during construction. In addition, in order to perform jack adjustment at any time during construction, it is necessary for the worker to monitor and manage, leading to an increase in work load. Moreover, the effect of posture control is not so high.

よって、本発明は、簡易な構造で高い傾斜修正効果を得ることができるとともに、軟弱地盤の現場や小規模な現場でも実施可能な手段の提供を目的とする。   Therefore, an object of the present invention is to provide means that can obtain a high inclination correction effect with a simple structure and can be carried out even on a soft ground site or a small site.

上記課題を解決すべくなされた本願の第１発明は、ニューマチックケーソン工法においてケーソンの傾斜修正を行う為の方法であって、ケーソンと、該ケーソンの外面と対向する反力面との間に、突っ張り材を、該突っ張り材が前記ケーソンに向けて上り勾配を設けた姿勢となるように配置し、前記ケーソンの沈降時に、前記突っ張り材が水平姿勢に遷移する際の反力によって前記ケーソンの傾斜を修正することを特徴とする、ニューマチックケーソンの傾斜修正方法を提供するものである。
また、本願の第２発明は、前記第１発明において、前記ケーソンの周囲に、少なくとも一つのガイドローラをさらに設け、前記突っ張り材とガイドローラとで、前記ケーソンを、上下方向において少なくとも二点で支持することを特徴とする。
また、本願の第３発明は、前記第１発明または第２発明において、前記突っ張り材が、前記反力面に接触する第１の接触部と、ケーソンに接触する第２の接触部と、前記第１の接触部および第２の接触部とそれぞれ回動自在に連結する腕部と、を少なくとも含むことを特徴とする。 The first invention of the present application to solve the above problem is a method for correcting the inclination of the caisson in the pneumatic caisson method, and between the caisson and the reaction force surface facing the outer surface of the caisson. The bracing material is disposed such that the bracing material is in an attitude with an upward slope toward the caisson, and when the caisson sinks, the reaction force when the brazing material transitions to a horizontal posture is used. A method of correcting the inclination of a pneumatic caisson characterized by correcting the inclination is provided.
Further, according to a second invention of the present application, in the first invention, at least one guide roller is further provided around the caisson, and the caisson is at least two points in the vertical direction by the tension member and the guide roller. It is characterized by supporting.
Further, according to a third invention of the present application, in the first invention or the second invention, the strut member has a first contact portion that contacts the reaction surface, a second contact portion that contacts a caisson, It includes at least a first contact portion and a second contact portion, and arm portions that are rotatably connected to the first contact portion and the second contact portion, respectively.

本願発明によれば、以下に記載する効果を奏する。
（１）突っ張り材を活用することによって、簡易な構造で高い傾斜修正効果を得ることができる。
（２）小規模な現場や軟弱地盤の現場であっても修正作業が簡便に実施できる。
（３）修正治具の構造が簡易であるため、低コストである。
（４）ケーソンに追随して動作するため、修正作業中に逐一監視・管理を行う必要が無い。
（５）撤去が簡単であり、工事の邪魔にならない。 According to the present invention, the following effects can be obtained.
(1) By using the bracing material, a high tilt correction effect can be obtained with a simple structure.
(2) The correction work can be easily performed even in a small-scale site or a soft ground site.
(3) Since the structure of the correction jig is simple, the cost is low.
(4) Since it operates following the caisson, there is no need to perform monitoring and management one by one during the correction work.
(5) Removal is easy and does not interfere with construction.

実施例１に係る傾斜修正方法において、突っ張り材の設置態様を示す図。In the inclination correction method which concerns on Example 1, the figure which shows the installation aspect of a tension member. 実施例１に係る傾斜修正方法において、傾斜を修正している状態を示す図。The figure which shows the state which is correcting the inclination in the inclination correction method which concerns on Example 1. FIG. 実施例２に係る傾斜修正方法において、ガイドローラの設置態様を示す図。In the inclination correction method which concerns on Example 2, the figure which shows the installation aspect of a guide roller. 実施例３に係る傾斜修正方法において、突っ張り材の変形例を示す図。In the inclination correction method which concerns on Example 3, the figure which shows the modification of a bracing material.

以下、本願発明の実施例について説明する。   Examples of the present invention will be described below.

図１，２を参照しながら、本発明の第１実施例について、施工手順に沿って説明する。
＜１＞初期状態〜突っ張り材の配置
図１では、沈降途中のケーソンＡが傾斜した状態を呈している。なお、説明の便宜上、本図におけるケーソンの傾斜角度を過大に表現している。
まず、このケーソンＡの傾斜側に突っ張り材Ｂを配置する。
より詳細に説明すると、突っ張り材は、ケーソンと、該ケーソンの外面と対向する反力面Ｃとの間に配置する。 The first embodiment of the present invention will be described along the construction procedure with reference to FIGS.
<1> Initial State to Arrangement of Strut Material FIG. 1 shows a state where the caisson A in the middle of sedimentation is inclined. For convenience of explanation, the inclination angle of the caisson in this figure is expressed excessively.
First, the tension member B is disposed on the inclined side of the caisson A.
More specifically, the tension member is disposed between the caisson and the reaction surface C facing the outer surface of the caisson.

前記反力面Ｃとは、地盤Ｃ１や、土留壁Ｃ２、腹起Ｃ３など、いわゆる山留め側の表面を構成する面のうち、配置後の突っ張り材に反力を作用させる面である。   The reaction force surface C is a surface that causes a reaction force to act on the post-arranged tension member among the surfaces constituting the surface of the so-called mountain retaining side, such as the ground C1, the retaining wall C2, and the flank C3.

突っ張り材Ｂの配置箇所は、なるべくケーソンＡの上部側とすることが好ましい。
突っ張り材Ｂの配置姿勢は、該突っ張り材ＢがケーソンＡに向けて上り勾配を設けた状態とする。
突っ張り材Ｂの材料または素材は、いわゆるタイコ落としや、鋼材、棒材など、長尺状の材料を用いることができる。 It is preferable that the location where the strut material B is disposed is on the upper side of the caisson A as much as possible.
The orientation of the strut member B is such that the strut member B has an upward slope toward the caisson A.
As the material or the material of the strut material B, a long material such as a so-called timber drop, a steel material, or a bar material can be used.

突っ張り材Ｂの長さは、特段限定しないが、少なくとも、ケーソンＡが正しい姿勢（被傾斜状態）であるときの、ケーソンＡと反力面Ｃとの間の離隔長さと同等またはそれ以上であることが好ましい。   The length of the tension member B is not particularly limited, but is at least equal to or longer than the separation length between the caisson A and the reaction surface C when the caisson A is in the correct posture (inclined state). It is preferable.

＜２＞ケーソンの沈降作業〜傾斜の修正
図２は、ケーソンＡの傾斜修正の過程を示す一部拡大図である。
突っ張り材Ｂを配置した状態で、通常の手順でケーソンＡの沈降作業を再開する。
このとき、突っ張り材ＢとケーソンＡとの接触箇所は不動のまま、ケーソンＡのみが沈降することとなり、突っ張り材Ｂは、反力面Ｃとの接触箇所を支点として、時計回りに回転するように動作する。
この回転動作によって、ケーソンＡ側に上り勾配を設けるように配していた突っ張り材Ｂは、前記上り勾配が緩くなるように水平姿勢側へと遷移することとなる。
この突っ張り材Ｂの遷移動作によって、前記突っ張り材Ｂは、反力面Ｃからの反力により、ケーソンＡを正しい姿勢へ復帰するように押し出す（押し返す）こととなる。この押出作用により、ケーソンＡの傾斜を修正することができる。 <2> Caisson Sedimentation Work-Correction of Inclination FIG.
With the bracing material B disposed, the caisson A sinking operation is resumed by a normal procedure.
At this time, only the caisson A is settled while the contact portion between the strut member B and the caisson A remains stationary, and the strut member B rotates clockwise with the contact portion with the reaction surface C as a fulcrum. To work.
By this rotation operation, the strut member B arranged so as to provide an upward slope on the caisson A side transitions to the horizontal posture side so that the upward slope becomes gentle.
By this transition operation of the tension member B, the tension material B is pushed out (returned) by the reaction force from the reaction force surface C so as to return the caisson A to the correct posture. By this extrusion action, the inclination of the caisson A can be corrected.

なお、前記したように、突っ張り材Ｂの長さを、ケーソンＡが正しい姿勢（被傾斜状態）であるときのケーソンＡと反力面Ｃとの間の離隔長さと同等程度にしておけば、突っ張り材Ｂが水平姿勢を維持した際には、ケーソンＡの傾斜が修正されて正しい姿勢を呈しており、それ以上ケーソンＡを押し出す事は無い。
よって、突っ張り材Ｂによって、必要以上にケーソンＡを押し出し、反対側からの傾斜修正作業を行う必要が生じるといった無駄を排除することができる。 Note that, as described above, if the length of the tension member B is set to be approximately equal to the separation length between the caisson A and the reaction surface C when the caisson A is in the correct posture (inclined state), When the bracing material B maintains the horizontal posture, the inclination of the caisson A is corrected to assume the correct posture, and the caisson A is not pushed out any more.
Therefore, it is possible to eliminate the waste that the caisson A needs to be pushed out more than necessary and the inclination correction work from the opposite side needs to be performed by the tension member B.

本実施例に係る傾斜修正方法によれば、ケーソンＡの沈降作業中にケーソンＡの傾斜が確認された際に、適宜突っ張り材Ｂを、ケーソンＡの傾斜側に盛り替えながら、ケーソンＡの沈降作業を進めていくだけで、ケーソンＡの傾斜を自動的に修正し、精度良くケーソンＡの沈下掘削作業を行うことができる。   According to the inclination correcting method according to the present embodiment, when the inclination of the caisson A is confirmed during the sinking operation of the caisson A, the subsidence of the caisson A is appropriately changed while the bracing material B is changed to the inclined side of the caisson A. By simply proceeding with the work, the inclination of the caisson A can be corrected automatically, and the caisson A can be accurately subsidized.

図３を参照しながら本発明の第２実施例について説明する。
本実施例では、前記反力面ＣとケーソンＡとの間に、少なくとも一つのガイドローラＤをさらに設けた構成を呈する。
ガイドローラＤは、ニューマチックケーソン工法で用いる公知のローラ部材を使用することができる。
ガイドローラＤは反力面側に固定されており、ケーソンＡとの接触側に設けたローラで、ケーソンＡの沈降を案内する目的で使用されている。 A second embodiment of the present invention will be described with reference to FIG.
In the present embodiment, a configuration in which at least one guide roller D is further provided between the reaction surface C and the caisson A is provided.
As the guide roller D, a known roller member used in the pneumatic caisson method can be used.
The guide roller D is fixed to the reaction force surface side, and is a roller provided on the contact side with the caisson A, and is used for the purpose of guiding sedimentation of the caisson A.

本実施例によれば、前記ガイドローラＤと前記突っ張り材Ｂとを併用することでケーソンＡを上下方向において少なくとも二点で支持することとなるため、ケーソンＡの姿勢安定性をより高めることができる。   According to the present embodiment, since the caisson A is supported at least at two points in the vertical direction by using the guide roller D and the tension material B in combination, the posture stability of the caisson A can be further improved. it can.

図４を参照しながら本発明の第３実施例について説明する。
突っ張り材Ｂは、以下の構成要素を呈してなる専用治具を用いることができる。 A third embodiment of the present invention will be described with reference to FIG.
As the strut material B, a dedicated jig having the following components can be used.

図４に示す突っ張り材Ｂは、前記反力面Ｃに接触する第１の接触部１０と、ケーソンに接触する第２の接触部２０と、前記第１の接触部１０および第２の接触部２０に対して、それぞれに回動自在に連結する腕部３０とから構成する。   4 includes a first contact portion 10 that contacts the reaction surface C, a second contact portion 20 that contacts a caisson, and the first contact portion 10 and the second contact portion. The arm portion 30 is rotatably connected to each other.

第１の接触部１０と反力面Ｃとの接触態様、および第２の接触部２０とケーソンＡとの接触態様は、当接構造、係止構造、締結構造など、公知の構造を用いる異が出来る。
本実施例では、反力面Ｃが腹起Ｃ１によって形成されており、第１の接触部をフック状に構成して腹起Ｃ１のフランジに係止する構造としている。 The contact mode between the first contact portion 10 and the reaction force surface C and the contact mode between the second contact portion 20 and the caisson A are different from each other using a known structure such as a contact structure, a locking structure, or a fastening structure. I can do it.
In the present embodiment, the reaction force surface C is formed by the abdominal protrusion C1, and the first contact portion is configured in a hook shape and locked to the flange of the abdominal protrusion C1.

本実施例によれば、腕部３０に対して、第１の接触部１０と第２の接触部２０がそれぞれ回動自在であるため、ケーソンＡの傾斜時からケーソンＡの非傾斜時（正しい姿勢の時）への遷移途中の何れであっても、前記第１の接触部１０および第２の接触部２０の各接触面が、ケーソンＡおよび反力面Ｃに全面にわたって接触した状態を維持できるため、突っ張り材Ｂの押出効果がより確実に発揮できる。   According to the present embodiment, since the first contact portion 10 and the second contact portion 20 are rotatable with respect to the arm portion 30, respectively, the caisson A is not inclined (the correct one is correct). The contact surfaces of the first contact portion 10 and the second contact portion 20 remain in contact with the caisson A and the reaction force surface C over the entire surface even during the transition to the posture). Therefore, the pushing effect of the brazing material B can be more reliably exhibited.

Ａ ケーソン
Ｂ 突っ張り材
Ｃ 反力面
Ｃ１ 地盤
Ｃ２ 土留壁
Ｃ３ 腹起
Ｄ ガイドローラ
１０ 第１の接触部
２０ 第２の接触部
３０ 腕部 A Caisson B Strut material C Reaction surface C1 Ground C2 Earth retaining wall C3 Abdominal rise D Guide roller 10 First contact part 20 Second contact part 30 Arm part

Claims (3)

ニューマチックケーソン工法においてケーソンの傾斜修正を行う為の方法であって、
ケーソンと、該ケーソンの外面と対向する反力面との間に、突っ張り材を、該突っ張り材が前記ケーソンに向けて上り勾配を設けた姿勢となるように配置し、
前記ケーソンの沈降時に、前記突っ張り材が水平姿勢に遷移する際の反力によって前記ケーソンの傾斜を修正することを特徴とする、
ニューマチックケーソンの傾斜修正方法。 A method for correcting the inclination of the caisson in the pneumatic caisson method,
Between the caisson and the reaction force surface facing the outer surface of the caisson, the strut material is arranged so that the strut material has an upward slope toward the caisson,
When the caisson settles, the slant of the caisson is corrected by a reaction force when the struts transition to a horizontal posture.
Pneumatic caisson tilt correction method. 前記ケーソンの周囲に、少なくとも一つのガイドローラをさらに設け、
前記突っ張り材とガイドローラとで、前記ケーソンを、上下方向において少なくとも二点で支持することを特徴とする、
請求項１に記載のニューマチックケーソンの傾斜修正方法。 At least one guide roller is further provided around the caisson,
The caisson is supported at least at two points in the vertical direction by the tension member and the guide roller,
The pneumatic caisson inclination correcting method according to claim 1. 前記突っ張り材が、
前記反力面に接触する第１の接触部と、
前記ケーソンに接触する第２の接触部と、
前記第１の接触部および第２の接触部とそれぞれ回動自在に連結する腕部と、
を少なくとも含むことを特徴とする、
請求項１または２に記載のニューマチックケーソンの傾斜修正方法。 The bracing material is
A first contact portion that contacts the reaction force surface;
A second contact portion that contacts the caisson;
An arm portion rotatably connected to each of the first contact portion and the second contact portion;
Including at least
The pneumatic caisson inclination correcting method according to claim 1 or 2.
JP2014162494A 2014-08-08 2014-08-08 Pneumatic caisson tilt correction method Active JP6386829B2 (en)

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CN106592615A (en) * 2016-11-17 2017-04-26 叶香雄 Deviation rectification construction method for inclined sink
CN110004963A (en) * 2019-04-18 2019-07-12 郑州市市政工程总公司 Well sinking overall process correction prevention alarm system and well sinking are rectified a deviation method
CN110924412A (en) * 2019-10-30 2020-03-27 中国二十二冶集团有限公司 Eddy flow tank open caisson deviation rectifying device and deviation rectifying method
AU2019439324B2 (en) * 2019-04-04 2023-04-06 Yanxu WEN Wall sinking construction method

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CN110924412A (en) * 2019-10-30 2020-03-27 中国二十二冶集团有限公司 Eddy flow tank open caisson deviation rectifying device and deviation rectifying method

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