JP2745138B2 - Mountain retaining method - Google Patents
Mountain retaining methodInfo
- Publication number
- JP2745138B2 JP2745138B2 JP32405688A JP32405688A JP2745138B2 JP 2745138 B2 JP2745138 B2 JP 2745138B2 JP 32405688 A JP32405688 A JP 32405688A JP 32405688 A JP32405688 A JP 32405688A JP 2745138 B2 JP2745138 B2 JP 2745138B2
- Authority
- JP
- Japan
- Prior art keywords
- cut
- retaining wall
- mountain retaining
- retaining method
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Description
【発明の詳細な説明】 （発明が属する技術分野） 本発明は地盤を掘削するときの山留め工法に関する。Description: TECHNICAL FIELD [0001] The present invention relates to a method of retaining a ground when excavating ground.
（発明の課題とその特徴点） 山留め支保工を施しながら地盤を掘削しているとき
に、山留め壁に設計時において予測しなかった側圧が作
用して、次の切ばりを予定位置に設置できない事態が発
生することがある。(Problems and Features of the Invention) When excavating the ground while performing the retaining work, the lateral pressure, which was not predicted at the time of design, acts on the retaining wall, so that the next notch cannot be installed at the expected position. Things can happen.
このような場合に、次の切ばりの位置を予定位置より
も上方にすることが従来行われているが、このようにす
ると最終的に切ばりの設置段数が増えることになり、好
ましくない。In such a case, the position of the next cut is conventionally set to be higher than the expected position. However, such an arrangement ultimately increases the number of steps of the cut, which is not preferable.
本発明は、最終的に切ばりの設置段数が増えないよう
にして前記事態に対処する新規の山留め工法を提供する
ことを目的としているものであって、その構成上の特徴
は特許請求の範囲に記載したとおりである。An object of the present invention is to provide a new mountain retaining method for coping with the above-mentioned situation without finally increasing the number of installation steps of the notch, and its structural features are described in the claims. It is as described in.
本発明は、前記事態の発生時、先に設置した切ばりの
位置の壁体応力にまだかなりの余裕があることに着目
し、この余裕を利用して壁体応力を平均化し、壁体応力
の最大値を低減させて、前記事態に対応するようにした
ものである。The present invention focuses on the fact that, at the time of the occurrence of the above situation, there is still a considerable margin in the wall stress at the position of the previously installed notch, and the wall stress is averaged by using this margin to obtain the wall stress. Is reduced to cope with the above situation.
（図面による説明） 図面は本発明の模式的説明図であり、１は山留め壁、
２は掘削面、3,4は先に設置した切ばりの位置、５は次
に設置する切ばりの位置を示している。(Description by Drawing) The drawing is a schematic explanatory view of the present invention, wherein 1 is a retaining wall,
Reference numeral 2 denotes an excavation surface, reference numerals 3 and 4 denote the positions of the previously installed cuts, and reference numeral 5 denotes a position of the next set cut.
図示の段階で、山留め壁１に設計時において予測しな
かった側圧が作用して、山留め壁１の曲げモーメントが
実線６で示すようになり、このまま掘削を続けて位置５
に予定通り次の切ばりを設置しようとすると、山留め壁
１の曲げモーメントの最大値が許容値を超えることが、
予測されたとする。At the stage shown in the drawing, a lateral pressure, which was not predicted at the time of design, acts on the retaining wall 1, and the bending moment of the retaining wall 1 is indicated by a solid line 6.
If you try to install the next cut as planned, the maximum value of the bending moment of the retaining wall 1 exceeds the allowable value,
Assume that it was predicted.
このような事態になったとき、本発明では、掘削作業
を一旦、中断し、先に設置した切ばりの位置を位置3,4
から下方の位置３′,4′に移動させ、山留め壁１の曲げ
モーメントを点線７で示すように平均化し、その最大値
を低減させて、次の切ばりを予定通り位置５に設置でき
るようにする。When such a situation occurs, in the present invention, the excavation work is temporarily stopped, and the position of the previously installed cut is set to the position 3,4.
To the lower positions 3 'and 4', the bending moment of the retaining wall 1 is averaged as shown by the dotted line 7, the maximum value is reduced, and the next cut can be set at the position 5 as scheduled. To
本発明を実施する場合は、掘削作業の進行に伴い、山
留め壁１の適所に設置した変位計で山留め壁１の変位
（たわみ角）を随時、検出して、山留め壁１の曲げモー
メントが設計通りであるか否かを確認しながら作業を進
め、先に設置した切ばりの位置を移動させることが必要
になったときは、例えば、位置3,4よりも上方の山留め
壁１の内面にそれぞれ反力受けを固着し、移動すべき切
ばりを腹起こしと共にジヤッキで位置３′,4′まで押し
下げるか、或いは、予め、切ばりと腹起こしの１セット
を用意しておき、これを位置３′に設置してから位置３
の切ばりと腹起こしを外し、次に、この外した切ばりと
腹起こしを位置４′に設置してから位置４の切ばりと腹
起こしを外す、という態様で先に設置した切ばりの位置
移動を行う。In carrying out the present invention, the displacement (deflection angle) of the retaining wall 1 is detected at any time by a displacement meter installed at an appropriate position of the retaining wall 1 as the excavation progresses, and the bending moment of the retaining wall 1 is designed. When it is necessary to move the position of the previously installed cutting edge while confirming whether or not the road is the same, for example, on the inner surface of the retaining wall 1 above the positions 3 and 4 Fix the respective reaction force receivers and push down the cutting edge to be moved together with the belly to the positions 3 'and 4' with the jack, or prepare one set of the cutting edge and the belly beforehand, ′ And then position 3
Then, remove the cut and belly, and then remove the cut and belly at position 4 ', and then remove the cut and belly at position 4 to move the position of the previously installed cut. Do.
（発明の効果） 本発明は、以上のようなものであるから、掘削作業の
途中で土留め壁に予期しない側圧が作用する事態が発生
した場合に、最終的に切ばりの段数が増えないようにし
て合理的にこれに対処することができる。(Effects of the Invention) Since the present invention is as described above, when an unexpected side pressure acts on the retaining wall during the excavation work, the number of cutting steps does not finally increase. This can be dealt with rationally.
図面は本発明の模式的説明図である。 1:山留め壁、2:掘削面、3,4:先に設置した切ばりの位
置、5:次に設置する切ばりの位置、・・・・。The drawings are schematic explanatory diagrams of the present invention. 1: Mountain retaining wall, 2: Excavation surface, 3, 4: Position of the cut installed first, 5: Position of the cut installed next, ...
Claims (1)
予測しなかった側圧が作用して、次の切ばりを予定位置
に設置できない事態が発生した際に、先に設置した切ば
りの位置を下方に移動させて山留め壁の壁体応力を平均
化して、次の切ばりの設置位置が予定位置よりも上方に
ならないようにすることを特徴とする山留め工法。(1) During excavation work, when a side pressure that was not predicted at the time of design acts on a retaining wall, and a situation occurs in which a next cut cannot be set at a predetermined position, the cut-off set first is set. A mountain retaining method characterized by moving the position downward to equalize the wall stress of the mountain retaining wall so that the installation position of the next cut is not higher than a predetermined position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32405688A JP2745138B2 (en) | 1988-12-22 | 1988-12-22 | Mountain retaining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32405688A JP2745138B2 (en) | 1988-12-22 | 1988-12-22 | Mountain retaining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02171421A JPH02171421A (en) | 1990-07-03 |
| JP2745138B2 true JP2745138B2 (en) | 1998-04-28 |
Family
ID=18161660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32405688A Expired - Fee Related JP2745138B2 (en) | 1988-12-22 | 1988-12-22 | Mountain retaining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2745138B2 (en) |
-
1988
- 1988-12-22 JP JP32405688A patent/JP2745138B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02171421A (en) | 1990-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |