JP2020183677A - Ground improvement method and ground improvement device using hydraulic measurement - Google Patents

Ground improvement method and ground improvement device using hydraulic measurement Download PDF

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JP2020183677A
JP2020183677A JP2019088969A JP2019088969A JP2020183677A JP 2020183677 A JP2020183677 A JP 2020183677A JP 2019088969 A JP2019088969 A JP 2019088969A JP 2019088969 A JP2019088969 A JP 2019088969A JP 2020183677 A JP2020183677 A JP 2020183677A
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mixing
stirring
ground improvement
bucket
ground
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伸太郎 奈良
Shintaro Nara
伸太郎 奈良
信明 氏房
Nobuaki Ujifusa
信明 氏房
藤田　秀明
Hideaki Fujita
秀明 藤田
武田　博
Hiroshi Takeda
博 武田
佐々木　敏弘
Toshihiro Sasaki
敏弘 佐々木
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FUJITA CHISHITSU KK
KOKUEI CO Ltd
NARA JUKI KOJI CO Ltd
SYSTEM PLANNING KK
Takeda Doboku Co Ltd
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FUJITA CHISHITSU KK
KOKUEI CO Ltd
NARA JUKI KOJI CO Ltd
SYSTEM PLANNING KK
Takeda Doboku Co Ltd
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Publication of JP2020183677A publication Critical patent/JP2020183677A/en
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Abstract

To provide a ground improvement method which dispenses with a special measurement device and facilitates quality confirmation.SOLUTION: A ground improvement method that constructs an improvement body in the ground by agitating/mixing sediment at the site and a slurry C containing water and a solidification material includes measuring a hydraulic value of piping to a rotation agitation blade 21 in a mixing bucket 20 for agitating/mixing the sediment at the site and the solidification material with a hydraulic sensor 30, performing an agitation/mixing work until the measurement value becomes almost constant, and thereby conforming homogenization of the improvement body.SELECTED DRAWING: Figure 1

Description

本発明は、回転撹拌翼を有するミキシングバケットを用いて、現地の土砂、固化材および水をその位置で撹拌・混合することによって地盤内にブロック状の改良体を製造するための地盤改良方法および地盤改良装置に関し、より詳しくは、回転撹拌翼の駆動油圧の計測値に基づいて、十分な撹拌・混合が行われたか否かを判断することが可能な地盤改良方法および地盤改良装置に関する。 The present invention provides a ground improvement method for producing a block-shaped improved body in the ground by stirring and mixing local earth and sand, a solidifying material and water at that position using a mixing bucket having a rotary stirring blade. More specifically, the present invention relates to a ground improvement method and a ground improvement device capable of determining whether or not sufficient stirring / mixing has been performed based on the measured values of the drive hydraulic pressure of the rotary stirring blade.

バケットの中に回転攪拌翼を有するミキシングバケットを用いて、現地の土砂とセメント系スラリーをその位置で撹拌・混合する施工方法はよく知られている（特許文献１）。
また、改良体全体が均一に撹拌・混合されているか否かを、施工完了直後に確認する手法として、撹拌・混合回数の確認、撹拌・混合土の電気比抵抗値の測定および撹拌・混合土のフロー値の測定などが知られている。 A well-known construction method is to use a mixing bucket having a rotary stirring blade in the bucket to stir and mix the local earth and sand and cement-based slurry at that position (Patent Document 1).
In addition, as a method of confirming whether or not the entire improved body is uniformly agitated and mixed immediately after the construction is completed, the number of times of agitation and mixing is confirmed, the electrical resistivity value of the agitated and mixed soil is measured, and the agitated and mixed soil is mixed. It is known to measure the flow value of.

特開２０１２−１１７３３４号公報Japanese Unexamined Patent Publication No. 2012-117334

しかし、上記した従来の方法では、以下の問題を有する。
（１）撹拌・混合回数の確認およびリアルタイムでの電気比抵抗値測定を行うためには、特殊な計測機器を取り付けた専用の回転攪拌翼を有するミキシングバケットが必要となり、導入コストが高くなる。
（２）施工直後に行う電気比抵抗値の測定装置を取り付けたロッドによる電気比抵抗値測定やサンプリングした撹拌・混合土のフォロー値測定では、必ずしも改良体全体の品質を把握できない。 However, the above-mentioned conventional method has the following problems.
(1) In order to confirm the number of times of stirring and mixing and to measure the electrical resistivity value in real time, a mixing bucket having a dedicated rotary stirring blade equipped with a special measuring device is required, which increases the introduction cost.
(2) It is not always possible to grasp the quality of the entire improved body by measuring the electrical resistivity value with a rod equipped with an electrical resistivity measuring device or measuring the follow-up value of the sampled agitated / mixed soil immediately after construction.

そこで、本発明は、特殊な計測機器等を必要とすることなく、品質確認も容易となる手段の提供を目的の一つとする。 Therefore, one of the objects of the present invention is to provide a means for facilitating quality confirmation without requiring a special measuring device or the like.

上記課題を解決すべくなされた本願の第１発明は、現地の土砂と、水及び固化材を含んだスラリーとをミキシングバケットで撹拌・混合することによって、地盤内に改良体を構築する、地盤改良方法であって、前記ミキシングバケット内の回転撹拌翼への配管の油圧値を計測し、該計測値がほぼ一定となるまで撹拌・混合作業を行う、撹拌・混合工程を少なくとも含むことを特徴とするものである。
また、本願の第２発明は、前記第１発明において、前記撹拌・混合工程が、（ａ）改良予定箇所を複数分割した分割領域毎に、前記計測値がほぼ一定となるまで、ミキシングバケットによる撹拌・混合作業を行う、流動化工程と、（ｂ）前記流動化工程を経た改良予定箇所の全体に対して、前記計測値がほぼ一定となるまで、ミキシングバケットによる撹拌・混合作業を行う、均質化工程と、を少なくとも含んでなることを特徴とするものである。
また、本願の第３発明は、現地の土砂と、水及び固化材を含んだスラリーとを撹拌・混合することによって、地盤内に改良体を構築するために使用する、地盤改良装置であって、油圧制御によって先端のミキシングバケットを操作可能な、重機と、前記ミキシングバケット内の回転撹拌翼への配管の油圧値を計測可能な、油圧センサと、前記油圧センサによる計測値について、該計測値の推移または前記ミキシングバケットの位置を表示可能な、表示装置と、を少なくとも備えたことを特徴とする。
また、本願の第４発明は、前記第３発明において、前記表示装置を、前記重機の運転席に配置してあることを特徴とするものである。
また、本願の第５発明は、前記第３発明において、前記重機を遠隔操作可能な情報処理端末をさらに有し、該情報処理端末に前記表示装置を設けてあることを特徴とする。 The first invention of the present application, which has been made to solve the above problems, is to construct an improved body in the ground by stirring and mixing local earth and sand and a slurry containing water and a solidifying material in a mixing bucket. It is an improved method and is characterized by including at least a stirring / mixing step of measuring the oil pressure value of the pipe to the rotary stirring blade in the mixing bucket and performing the stirring / mixing operation until the measured value becomes almost constant. Is to be.
Further, in the second invention of the present application, in the first invention, the stirring / mixing step uses a mixing bucket until the measured value becomes substantially constant for each divided region (a) in which a plurality of planned improvement points are divided. The stirring / mixing work is performed by the mixing bucket until the measured value becomes almost constant with respect to the fluidization step in which the stirring / mixing work is performed and (b) the entire planned improvement points that have undergone the fluidization step. It is characterized by including at least a homogenization step.
The third invention of the present application is a ground improvement device used for constructing an improved body in the ground by stirring and mixing local earth and sand and a slurry containing water and a solidifying material. A hydraulic sensor capable of measuring the hydraulic value of a heavy machine capable of operating the mixing bucket at the tip by hydraulic control and a pipe to the rotary stirring blade in the mixing bucket, and the measured value by the hydraulic sensor. It is characterized by having at least a display device capable of displaying the transition of the above or the position of the mixing bucket.
Further, the fourth invention of the present application is characterized in that, in the third invention, the display device is arranged in the driver's seat of the heavy machine.
Further, the fifth invention of the present application is characterized in that, in the third invention, the information processing terminal capable of remotely controlling the heavy machine is further provided, and the information processing terminal is provided with the display device.

本発明の地盤改良装置は、次のような効果を得ることができる。
（１）十分な撹拌・混合が行われたか否かを簡易に確認することができる。
重機本体から標準装備されている配管より供給される油を用いて動作するミキシングバケット内の回転撹拌翼の回転トルクの変化を、配管途上に新たに設ける油圧センサにより油圧値の変化で捉えることで、十分に撹拌・混合が行われたことを油圧値がほぼ一定の値を示したことをもって確認することができる。
（２）低コストでの実施が可能となる。
また、本発明を構成する地盤改良装置を構成する機材・機器は汎用品であることから全てリース品・レンタル品で賄うことができるため、別途専用品を製作する必要がなく、コストの低減に寄与する。 The ground improvement device of the present invention can obtain the following effects.
(1) It is possible to easily confirm whether or not sufficient stirring / mixing has been performed.
By capturing the change in the rotational torque of the rotary stirring blade in the mixing bucket that operates using the oil supplied from the piping that is standard equipment from the heavy equipment body, by the change in the oil pressure value with a new hydraulic sensor installed in the middle of the piping. It can be confirmed by the fact that the oil pressure value shows a substantially constant value that the stirring and mixing have been sufficiently performed.
(2) It can be implemented at low cost.
Further, since the equipment and devices constituting the ground improvement device constituting the present invention are general-purpose products, all of them can be covered by leased products and rental products, so that it is not necessary to separately manufacture a dedicated product, which reduces costs. Contribute.

本発明に係る撹拌装置を示す概略図Schematic diagram showing a stirring device according to the present invention 表示装置による油圧計測値の表示例を示す図。The figure which shows the display example of the oil pressure measurement value by a display device. 本発明に係る地盤改良方法の手順を示す図（１）。The figure (1) which shows the procedure of the ground improvement method which concerns on this invention. 本発明に係る地盤改良方法の手順を示す図（２）。The figure (2) which shows the procedure of the ground improvement method which concerns on this invention. 表示装置による改良予定箇所の表示例を示す図。The figure which shows the display example of the part to be improved by the display device. 各工程での油圧値の遷移イメージ図。Transition image diagram of hydraulic pressure value in each process.

以下、図面を参照しながら、本発明の実施例について説明する。 Hereinafter, examples of the present invention will be described with reference to the drawings.

＜１＞全体構成（図１）
本発明に係る地盤改良装置は、現地の土砂と、水及び固化材を含んだスラリーＣとを撹拌・混合することによって、地盤内に改良体を構築するために使用する装置である。
図１に示す地盤改良装置は、アーム先端にミキシングバケット２０を設けた重機１０と、該重機１０に取り付ける油圧センサ３０と、前記重機１０の運転席に設置する表示装置４０とを少なくとも備えてなる。
以下、各構成要素の詳細について説明する。 <1> Overall configuration (Fig. 1)
The ground improvement device according to the present invention is a device used to construct an improved body in the ground by stirring and mixing local earth and sand and slurry C containing water and a solidifying material.
The ground improvement device shown in FIG. 1 includes at least a heavy machine 10 having a mixing bucket 20 at the tip of the arm, a hydraulic sensor 30 attached to the heavy machine 10, and a display device 40 installed in the driver's seat of the heavy machine 10. ..
The details of each component will be described below.

＜２＞重機（図１）
重機１０は、地盤を改良する予定の箇所の掘削や撹拌・混合を行うための装置である。
本発明では、重機１０にバックホウを用いており、アームの先端を種々のアタッチメントに交換可能な構成を呈している。この重機１０を改良予定箇所Ａの掘削作業に用いる場合には、公知の掘削用バケットやスケルトンバケットなどを取り付けて使用する。また、重機１０改良予定箇所Ａの撹拌・混合作業を行う場合には、公知のミキシングバケット２０などに交換して使用する。 <2> Heavy equipment (Fig. 1)
The heavy machine 10 is a device for excavating, stirring, and mixing a portion where the ground is to be improved.
In the present invention, a backhoe is used for the heavy machine 10, and the tip of the arm can be replaced with various attachments. When this heavy machine 10 is used for the excavation work of the planned improvement location A, a known excavation bucket, skeleton bucket, or the like is attached and used. Further, when the stirring / mixing work of the heavy equipment 10 planned improvement portion A is performed, it is used by replacing it with a known mixing bucket 20 or the like.

＜３＞ミキシングバケット（図１）
ミキシングバケット２０は、改良予定箇所Ａの土と、別途投入する固化材および水からなるスラリーＣとを撹拌・混合するための装置である。
ミキシングバケット２０は、バケットの中に回転撹拌翼２１を備えており、バケットで掻き出し収容した土およびスラリーＣを回転撹拌翼２１で、撹拌・混合することで土を流動化させる。
本発明では、ミキシングバケット２０は、公知のものを使用することができる。
本実施例に係るミキシングバケット２０は、前記回転撹拌翼２１を可動させるための油圧モータを設けており、重機１０に予め用意されている配管に油圧モータを接続して、重機１０のオペレータから回転撹拌翼２１の始動・停止を可能に構成している。 <3> Mixing bucket (Fig. 1)
The mixing bucket 20 is a device for stirring and mixing the soil of the planned improvement location A and the slurry C composed of the solidifying material and water to be charged separately.
The mixing bucket 20 is provided with a rotary stirring blade 21 in the bucket, and the soil and slurry C scraped and contained in the bucket are stirred and mixed by the rotary stirring blade 21 to fluidize the soil.
In the present invention, a known mixing bucket 20 can be used.
The mixing bucket 20 according to the present embodiment is provided with a hydraulic motor for moving the rotary stirring blade 21, and the hydraulic motor is connected to a pipe prepared in advance in the heavy machine 10 to rotate from the operator of the heavy machine 10. The stirring blade 21 can be started and stopped.

＜４＞油圧センサ（図１）
油圧センサ３０は、ミキシングバケット２０内の回転撹拌翼２１へと接続する重機１０の配管に介設して、当該配管内の油圧値を計測するための装置である。
油圧センサ３０は、公知の装置を使用することができる。
なお、油圧センサ３０は、重機１０に予め備え付けられている圧力センサを流用しても良いし、新規に重機１０に取り付ける別製品の油圧センサ３０を用いても良い。
本実施例では、油圧センサ３０を重機１０のブームに取り付けている。
油圧センサ３０による計測値と、回転撹拌翼２１の回転トルクの間では、油圧が小さければ回転トルクも小さく、油圧が大きければ回転トルクも大きくなる点で相関性があるものと考えられる。
したがって、本発明では、回転撹拌翼２１で撹拌・混合する土等の流動性が一定となれば、回転撹拌翼２１の回転トルク、引いては油圧センサ３０による油圧の計測値も一定に近づく点に着目して、改良予定箇所による撹拌・混合が完了したか否かを判定する。 <4> Hydraulic sensor (Fig. 1)
The oil pressure sensor 30 is a device for measuring the oil pressure value in the pipe of the heavy machine 10 connected to the rotary stirring blade 21 in the mixing bucket 20.
As the oil pressure sensor 30, a known device can be used.
As the oil pressure sensor 30, the pressure sensor provided in the heavy machine 10 in advance may be diverted, or another product hydraulic sensor 30 newly attached to the heavy machine 10 may be used.
In this embodiment, the hydraulic pressure sensor 30 is attached to the boom of the heavy equipment 10.
It is considered that there is a correlation between the value measured by the hydraulic pressure sensor 30 and the rotational torque of the rotary stirring blade 21 in that if the hydraulic pressure is small, the rotational torque is small, and if the hydraulic pressure is large, the rotational torque is large.
Therefore, in the present invention, if the fluidity of the soil or the like to be agitated and mixed by the rotary stirring blade 21 becomes constant, the rotational torque of the rotary stirring blade 21 and the measured value of the hydraulic pressure by the hydraulic pressure sensor 30 also approach constant. Focusing on, it is determined whether or not the stirring / mixing at the planned improvement location is completed.

＜５＞表示装置（図１，図２）
表示装置４０は、油圧センサ３０によって得られるミキシングバケット２０内の回転撹拌翼２１へと配管する油圧の計測値を表示するための装置である。
表示装置４０は、ＰＣ、タブレット型端末、スマートフォンなどの、ディスプレイを備えた端末を使用することができる。
表示装置４０は、オペレータによる視認が容易となるよう、重機１０の運転席に設置する構成が好ましい。 <5> Display device (Figs. 1 and 2)
The display device 40 is a device for displaying the measured value of the hydraulic pressure to be piped to the rotary stirring blade 21 in the mixing bucket 20 obtained by the hydraulic pressure sensor 30.
As the display device 40, a terminal provided with a display, such as a PC, a tablet terminal, or a smartphone, can be used.
The display device 40 is preferably installed in the driver's seat of the heavy machine 10 so that it can be easily visually recognized by the operator.

表示装置４０による計測値の表示態様は、種々の方法を採用することができる。
例えば、図２（ａ）に示すように、表示装置４に示す表示画面４１は、横軸を時間、縦軸と計測値として態様とし、時系列的に計測値の推移をグラフで表示して、計測値の推移を確認できる構成としてもすることができる。
なお、所定の期間内に複数回計測した値の平均値をグラフにプロットするよう構成すると、計測値の推移傾向を捉えやすい点で好ましい。
その他、図２（ｂ）に示すように、表示画面４１を、現在の計測値のみ表示する態様とし、計測値をリアルタイムに把握する構成としてもよい。
これらの表示態様は、後述する地盤改良方法の実施の際に、オペレータが、施工完了を判定できることが可能な範囲で適宜設計することができる。
なお、施工完了の判定や重機による撹拌・混合作業の停止・再開などを別途プログラム等によって自動で行う場合には、表示装置４０の構成は必須ではない。 Various methods can be adopted as the display mode of the measured value by the display device 40.
For example, as shown in FIG. 2A, the display screen 41 shown in the display device 4 has a horizontal axis as time and a vertical axis as measured values, and displays the transition of the measured values in a graph in time series. , It can also be configured so that the transition of the measured value can be confirmed.
It is preferable to plot the average value of the values measured a plurality of times within a predetermined period on a graph because it is easy to grasp the transition tendency of the measured values.
In addition, as shown in FIG. 2B, the display screen 41 may be configured to display only the current measured value, and the measured value may be grasped in real time.
These display modes can be appropriately designed to the extent that the operator can determine the completion of construction when implementing the ground improvement method described later.
The configuration of the display device 40 is not indispensable when determining the completion of construction and automatically stopping / restarting the stirring / mixing work by a heavy machine by a separate program or the like.

＜６＞その他の手段
その他、地盤改良装置には、以下の手段を設けても良い。 <6> Other means In addition, the following means may be provided in the ground improvement device.

＜６．１＞バケット位置の特定プログラム（図示せず）
改良予定箇所Ａに対する重機１０の位置や、重機１０のブームやアームに設けた傾斜センサなどによって、改良予定箇所Ａに対するバケットの位置を示すプログラムを設けることができる。 <6.1> Bucket position identification program (not shown)
A program that indicates the position of the bucket with respect to the planned improvement location A can be provided by the position of the heavy machine 10 with respect to the planned improvement location A, the inclination sensor provided on the boom or arm of the heavy equipment 10, and the like.

＜６．２＞作業完了領域の表示プログラム（図示せず）
前記表示装置４０に、改良予定箇所Ａを任意に空間分割した図を表示し、前記＜６．１＞によるバケットの位置情報と照らし合わせて、図内の各セルにバケットが通過したことを確認可能なプログラムを設けてもよい。 <6.2> Display program of work completion area (not shown)
A diagram in which the planned improvement portion A is arbitrarily divided into spaces is displayed on the display device 40, and it is confirmed that the bucket has passed through each cell in the diagram by comparing with the position information of the bucket according to <6.1>. A possible program may be provided.

＜６．３＞遠隔操作用の情報処理端末（図示せず）
前記重機１０を遠隔操作するための情報処理端末を設けることができる。
情報処理端末は、ＰＣ、タブレット型端末、スマートフォンなどを使用することができる。
この場合、運転席に設ける表示装置４０とは別に、情報処理端末に前記表示装置４０の機能を持たせてもよい。 <6.3> Information processing terminal for remote control (not shown)
An information processing terminal for remotely controlling the heavy machine 10 can be provided.
As the information processing terminal, a PC, a tablet terminal, a smartphone or the like can be used.
In this case, the information processing terminal may have the function of the display device 40 separately from the display device 40 provided in the driver's seat.

＜７＞使用方法（図３，４）
前記した地盤改良装置を用いた、地盤改良方法の手順の一例について説明する。 <7> How to use (Figs. 3 and 4)
An example of the procedure of the ground improvement method using the above-mentioned ground improvement device will be described.

（１）土の裁断、障害物の撤去（図３（ａ））
改良予定箇所Ａを、一般的なバケットやスケルトンバケットを取り付けた重機１０で掘削し、中の土の裁断や、地中の障害物などの撤去を行う。 (1) Cutting soil and removing obstacles (Fig. 3 (a))
The planned improvement point A is excavated by a heavy machine 10 equipped with a general bucket or a skeleton bucket, and the soil inside is cut and obstacles in the ground are removed.

（２）余剰土Ｂの撤去（図３（ｂ））
改良予定箇所Ａの中の土の一部を余剰土Ｂとして撤去する。これは次工程のスラリーＣを投入した際に、スラリーＣが改良予定箇所Ａからあふれ出さないようにするためである。 (2) Removal of surplus soil B (Fig. 3 (b))
Part of the soil in the planned improvement location A will be removed as surplus soil B. This is to prevent the slurry C from overflowing from the planned improvement portion A when the slurry C in the next step is charged.

（３）スラリーＣの投入（図３（ｃ））
余剰土Ｂを撤去した領域にスラリーＣを投入する。
スラリーＣは、地盤改良作業で一般的に使用される、水と固化材との混合物である。
スラリーＣは予め混合した状態で投入してもよいし、水と固化材とを別々に投入してもよい。 (3) Addition of slurry C (FIG. 3 (c))
Slurry C is put into the region where the surplus soil B has been removed.
Slurry C is a mixture of water and a solidifying material that is commonly used in ground improvement work.
The slurry C may be added in a premixed state, or water and the solidifying material may be added separately.

（４）流動化処理（部分的な撹拌・混合）（図４）
ミキシングバケット２０に交換した重機１０でもって、投入したスラリーＣと改良予定箇所Ａの中の土を撹拌・混合して、徐々に改良予定箇所Ａの中の土の流動化を進める。
一般的には、改良予定箇所Ａを、バケットの幅長単位で複数分割した領域毎に、撹拌・混合を行う。
図４は、改良予定箇所Ａをバケットの幅方向に分割した複数の領域（Ａ１〜Ａ４）のうち一つの領域（Ａ１）において、重機１０によって流動化処理を実施しているイメージ図であり、（ａ）は平面図、（ｂ）は正面断面図である。 (4) Fluidization treatment (partial stirring / mixing) (Fig. 4)
The heavy machine 10 replaced with the mixing bucket 20 stirs and mixes the charged slurry C and the soil in the planned improvement location A, and gradually promotes the fluidization of the soil in the planned improvement location A.
In general, the planned improvement portion A is stirred and mixed for each region divided into a plurality of bucket width units.
FIG. 4 is an image diagram in which the heavy equipment 10 is performing the fluidization process in one region (A1) of the plurality of regions (A1 to A4) in which the planned improvement portion A is divided in the width direction of the bucket. a) is a plan view, and (b) is a front sectional view.

（４．１）判定方法
この撹拌・混合作業は、前記油圧センサ３０による計測値がほぼ一定となるまで行うものとする。
撹拌・混合が十分でない場合には、回転撹拌翼２１の回転トルクが安定せず、その結果、回転撹拌翼２１を駆動するための配管内の油圧も安定しない。
しかし、撹拌・混合が進んでいくと、回転撹拌翼２１の回転トルクが安定し始め、回転撹拌翼２１を駆動するための配管内の油圧もほぼ一定の値を維持するようになる。
オペレータは、前記表示装置４０によって表示される油圧センサ３０による計測値がほぼ一定となり安定した状態となったことを、撹拌・混合が十分に行われたと判断して、次の領域の撹拌・混合作業に移る。 (4.1) Judgment method This stirring / mixing operation shall be performed until the value measured by the oil pressure sensor 30 becomes substantially constant.
If the stirring / mixing is not sufficient, the rotational torque of the rotary stirring blade 21 is not stable, and as a result, the oil pressure in the pipe for driving the rotary stirring blade 21 is also unstable.
However, as the stirring / mixing progresses, the rotational torque of the rotary stirring blade 21 begins to stabilize, and the oil pressure in the pipe for driving the rotary stirring blade 21 also maintains a substantially constant value.
The operator determines that the stirring / mixing has been sufficiently performed when the value measured by the hydraulic sensor 30 displayed by the display device 40 becomes almost constant and becomes stable, and the operator stirs / mixes in the next region. Move on to work.

（４．２）各領域に対する作業完了の確認方法（図５）
なお、上記した、油圧センサ３０の計測値による撹拌・混合作業の確認と併せて、前記＜６．１＞＜６．２＞で示したバケットの位置特定プログラムや作業完了領域の表示プログラムを用い、各分割領域（Ａ１〜Ａ４）に対して奥行き方向及び深さ方向にセル４３で分割したモデル図４２を表示装置４０に表示し、当該モデル図４２内の各セル４３にミキシングバケット２０が通過したこと、すなわち撹拌・混合作業が行われたことを着色等によって確認することで、全ての領域について撹拌・混合作業が行われたことを確認していけば、作業漏れが生ずることはない。 (4.2) How to confirm the completion of work for each area (Fig. 5)
In addition to the above-mentioned confirmation of the stirring / mixing work by the measured value of the hydraulic sensor 30, the bucket position identification program and the work completion area display program shown in <6.1> and <6.2> are used. A model diagram 42 divided by cells 43 in the depth direction and the depth direction for each division region (A1 to A4) is displayed on the display device 40, and the mixing bucket 20 passes through each cell 43 in the model diagram 42. If it is confirmed by coloring or the like that the stirring / mixing work has been performed, that is, the stirring / mixing work has been performed in all areas, no work omission will occur.

（５）均質化処理（全体的な撹拌・混合）
前記（４）の流動化処理を、改良予定箇所Ａの全ての分割領域（Ａ１〜Ａ４）で完了させたあとは、再度、改良予定箇所Ａ全体を対象として、ミキシングバケット２０による撹拌・混合作業を行う。
これは、前記（４）の流動化処理を進めた際に、作業中の領域から、既に撹拌・混合済みの領域に土が混入し、不均一な領域が事後的に発生してしまっている場合があるからである。
本工程での撹拌・混合作業のイメージは、前記した流動化処理工程とほぼ同一であるため、図示を省略する。 (5) Homogenization treatment (overall stirring / mixing)
After the fluidization process of (4) is completed in all the divided regions (A1 to A4) of the planned improvement location A, the mixing bucket 20 is used to stir and mix the entire planned improvement location A again. I do.
This is because when the fluidization process of (4) is advanced, soil is mixed into the already agitated / mixed region from the region being worked on, and a non-uniform region is generated after the fact. Because there are cases.
Since the image of the stirring / mixing operation in this step is almost the same as the above-mentioned fluidization treatment step, the illustration is omitted.

また、均質化処理が行われたことを判定する方法、および均質化処理が全ての領域で完了したことを示す方法は、前記した（４．１）および（４．２）の方法を採用することができる。 Further, as a method for determining that the homogenization treatment has been performed and a method for indicating that the homogenization treatment has been completed in all regions, the methods (4.1) and (4.2) described above are adopted. be able to.

（６）撹拌・混合時の油圧遷移のイメージ（図６）
図６に、前記（４）（５）の作業時における油圧遷移の概念図を示す。
前記（４）の流動化処理工程において、撹拌・混合が十分でない場合には、回転撹拌翼２１の回転トルクが安定せず、その結果、回転撹拌翼２１を駆動するための配管内の油圧も安定せず、高い値を示す（Ｐ２）。
しかし、撹拌・混合が進んで土の流動性が均一になると、回転撹拌翼２１の回転トルクが安定し始め、回転撹拌翼２１を駆動するための配管内の油圧もほぼ一定の値（Ｐ１）を維持するようになる。
また、前記（５）の均質化処理工程では、前記（４）のスラリーＣ投入直後よりも土の流動性は比較的高い状態であると考えられるため、油圧センサ３０による計測値（Ｐ３）も前記（４）の流動化処理で特定された一定値に近い値を示した状態から開始されるものと考えられる。その状態からミキシングバケット２０が改良予定箇所Ａの何れの位置にある状態でも、計測値がほぼ一定値（Ｐ１）であることが確認されれば、改良予定箇所Ａの全ての領域で均質化が行われたと判定することができる。 (6) Image of hydraulic pressure transition during stirring / mixing (Fig. 6)
FIG. 6 shows a conceptual diagram of the hydraulic pressure transition during the work of (4) and (5).
If the stirring / mixing is not sufficient in the fluidization treatment step (4), the rotational torque of the rotary stirring blade 21 is not stable, and as a result, the oil pressure in the pipe for driving the rotary stirring blade 21 is also increased. It is not stable and shows a high value (P 2 ).
However, when the stirring and mixing proceed and the fluidity of the soil becomes uniform, the rotational torque of the rotary stirring blade 21 begins to stabilize, and the oil pressure in the pipe for driving the rotary stirring blade 21 also has a substantially constant value (P 1). ) Will be maintained.
Further, in the homogenization treatment step of (5), it is considered that the fluidity of the soil is relatively higher than immediately after the slurry C is added in (4), so that the value measured by the hydraulic sensor 30 (P 3 ). Is also considered to be started from a state showing a value close to a constant value specified in the fluidization process of (4) above. From that state, if it is confirmed that the measured value is almost constant (P 1 ) regardless of the position of the mixing bucket 20 at the planned improvement location A, homogenization is performed in all the regions of the planned improvement location A. Can be determined to have been performed.

１０：重機
１１：バケット
２０：ミキシングバケット
２１：回転撹拌翼
３０：油圧センサ
４０：表示装置
４１：表示画面
４２：モデル図
４３：セル
Ａ ：改良予定箇所
Ａ１〜Ａ４：分割領域
Ｂ ：余剰土
Ｃ ：スラリー 10: Heavy machine 11: Bucket 20: Mixing bucket 21: Rotating stirring blade 30: Hydraulic sensor 40: Display device 41: Display screen 42: Model diagram 43: Cell A: Planned improvement points A1 to A4: Divided area B: Surplus soil C :slurry

Claims (5)

現地の土砂と、水及び固化材を含んだスラリーとをミキシングバケットで撹拌・混合することによって、地盤内に改良体を構築する、地盤改良方法であって、
前記ミキシングバケット内の回転撹拌翼への配管の油圧値を計測し、該計測値がほぼ一定となるまで撹拌・混合作業を行う、撹拌・混合工程を少なくとも含むことを特徴とする、
地盤改良方法。 This is a ground improvement method in which an improved body is constructed in the ground by stirring and mixing local earth and sand and a slurry containing water and a solidifying material in a mixing bucket.
It is characterized by including at least a stirring / mixing step of measuring the hydraulic pressure value of the pipe to the rotary stirring blade in the mixing bucket and performing the stirring / mixing operation until the measured value becomes almost constant.
Ground improvement method. 前記撹拌・混合工程が、
（ａ）改良予定箇所を複数分割した分割領域毎に、前記計測値がほぼ一定となるまで、ミキシングバケットによる撹拌・混合作業を行う、流動化工程と、
（ｂ）前記流動化工程を経た改良予定箇所の全体に対して、前記計測値がほぼ一定となるまで、ミキシングバケットによる撹拌・混合作業を行う、均質化工程と、
を少なくとも含んでなることを特徴とする、
請求項１に記載の地盤改良方法。 The stirring / mixing step
(A) A fluidization step in which a stirring / mixing operation is performed by a mixing bucket until the measured value becomes almost constant for each divided region in which a plurality of planned improvement points are divided.
(B) A homogenization step in which the mixing bucket is used to stir and mix the entire planned improvement portion through the fluidization step until the measured value becomes almost constant.
It is characterized by containing at least
The ground improvement method according to claim 1. 現地の土砂と、水及び固化材を含んだスラリーとを撹拌・混合することによって、地盤内に改良体を構築するために使用する、地盤改良装置であって、
油圧制御によって先端のミキシングバケットを操作可能な、重機と、
前記ミキシングバケット内の回転撹拌翼への配管の油圧値を計測可能な、油圧センサと、
前記油圧センサによる計測値について、該計測値の推移または前記ミキシングバケットの位置を表示可能な、表示装置と、を少なくとも備えたことを特徴とする、
地盤改良装置。 A ground improvement device used to construct an improved body in the ground by stirring and mixing local earth and sand with a slurry containing water and a solidifying material.
Heavy equipment that can operate the mixing bucket at the tip by hydraulic control,
An oil pressure sensor capable of measuring the oil pressure value of the piping to the rotary stirring blade in the mixing bucket, and
It is characterized by including at least a display device capable of displaying the transition of the measured value or the position of the mixing bucket with respect to the measured value by the hydraulic sensor.
Ground improvement device. 前記表示装置を、前記重機の運転席に配置してあることを特徴とする、
請求項３に記載の地盤改良装置。 The display device is arranged in the driver's seat of the heavy machine.
The ground improvement device according to claim 3. 前記重機を遠隔操作可能な情報処理端末をさらに有し、該情報処理端末に前記表示装置を設けてあることを特徴とする、
請求項３に記載の地盤改良装置。 It further has an information processing terminal capable of remotely controlling the heavy machine, and the information processing terminal is provided with the display device.
The ground improvement device according to claim 3.
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