JP2001123785A - Initial depth measuring method for underground excavator - Google Patents
Initial depth measuring method for underground excavatorInfo
- Publication number
- JP2001123785A JP2001123785A JP30454899A JP30454899A JP2001123785A JP 2001123785 A JP2001123785 A JP 2001123785A JP 30454899 A JP30454899 A JP 30454899A JP 30454899 A JP30454899 A JP 30454899A JP 2001123785 A JP2001123785 A JP 2001123785A
- Authority
- JP
- Japan
- Prior art keywords
- measuring
- underground excavator
- fixed point
- wire
- initial depth
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 2
- 238000009430 construction management Methods 0.000 description 1
- 238000011326 mechanical measurement Methods 0.000 description 1
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、地上の固定点か
ら吊り下げた計測用ワイヤを地中掘削機の定点と連結し
て一定張力を加え、地上の計測器で前記計測用ワイヤの
傾きと繰り出し量を計測することにより地中掘削機の変
位を計測する方法を実施する当初に、地中掘削機の初期
深度を計測する方法の技術分野に属する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring wire suspended from a fixed point on the ground and connected to a fixed point of an underground excavator to apply a constant tension. Initially, when the method of measuring the displacement of the underground excavator by measuring the extension amount is included, the present invention belongs to the technical field of the method of measuring the initial depth of the underground excavator.
【０００２】[0002]
【従来の技術】地中連続壁は、壁としての構造的一体性
を確保すること、及び止水壁としての止水性を確保する
ことが重視されており、地中掘削機による施工時に掘削
の進捗状況を正確に管理することが求められている。特
に、掘削の深度が１００ｍを超えるような場合には、高
精度な計測管理技術が要求される。2. Description of the Related Art Underground continuous walls are important for ensuring structural integrity as a wall and for securing water-blocking properties as a water-blocking wall. There is a need to accurately manage progress. In particular, when the excavation depth exceeds 100 m, a highly accurate measurement management technique is required.
【０００３】そこで最近では、図１に原理図を示したよ
うに、地上の固定点１から吊り下げた計測用ワイヤ２の
下端を地中掘削機３の定点と連結して一定張力を加え、
地上の計測器４で前記計測用ワイヤ２の傾きと繰り出し
量を計測することにより地中掘削機３の変位を計測する
方法及び装置が開発され（例えば特開平１０−２９９０
２８号公報記載の発明など参照）、掘削施工時に掘削機
の位置ないし変位を計測しつつリアルタイムに掘削の方
向を修正しつつ施工することを可能ならしめている。Recently, as shown in FIG. 1, the lower end of a measuring wire 2 suspended from a fixed point 1 on the ground is connected to a fixed point of an underground excavator 3 to apply a constant tension.
A method and an apparatus for measuring the displacement of the underground excavator 3 by measuring the inclination and the feeding amount of the measuring wire 2 with the measuring instrument 4 on the ground have been developed (for example, Japanese Patent Laid-Open No. 10-2990).
No. 28), it is possible to measure the position or displacement of the excavator at the time of excavation and correct the excavation direction in real time.
【０００４】[0004]
【本発明が解決しようとする課題】図１に例示したよう
な地中掘削機の変位計測方法及び装置が所期の精度を発
揮するためには、変位計測装置を設置した当初の初期値
設定を正確に行う必要がある。というのも、前記の変位
計測装置は、地中掘削機３が新規の掘削を開始し、その
掘削孔７が地中掘削機３の全長（全高）を完全に沈ませ
る深さとなった後に、同掘削孔７の地上開口部に、掘削
孔７をのぞき込む形に設置される。この設置時点で、地
中掘削機３の深度（初期深度）を初期値として正確に計
測し入力しておかねばならない。In order for the method and apparatus for measuring the displacement of an underground excavator as exemplified in FIG. 1 to exhibit the intended accuracy, it is necessary to set the initial value at the time of installing the displacement measuring apparatus. Need to be done exactly. This is because, after the underground excavator 3 starts a new excavation and the excavation hole 7 reaches a depth that completely sinks the entire length (overall height) of the underground excavator 3, The drilling hole 7 is installed at a ground opening of the drilling hole 7 so as to look into the drilling hole 7. At the time of this installation, the depth (initial depth) of the underground excavator 3 must be accurately measured and input as an initial value.
【０００５】しかし、掘削孔７の中には地盤安定液が満
たされているため、安定液中に水没した地中掘削機３の
定点から地上に位置する計測装置の固定点１までの鉛直
距離を計測することは容易でない。However, since the ground hole 7 is filled with the ground stabilizing liquid, the vertical distance from the fixed point of the underground excavator 3 submerged in the stabilizing liquid to the fixed point 1 of the measuring device located on the ground. Is not easy to measure.
【０００６】従来は前記の距離を巻尺などを使用して計
測し、演算式の初期値として入力していたが、正確な計
測を期待し得なかった。よって、安定液の存在などに邪
魔されない、正確で自動機械的な計測方法が要望されて
いる。Conventionally, the above distance was measured using a tape measure or the like, and was input as an initial value of an arithmetic expression. However, accurate measurement could not be expected. Therefore, there is a demand for an accurate and automatic mechanical measurement method which is not disturbed by the presence of the stabilizing liquid.
【０００７】本発明の目的は、計測装置の設置後に、安
定液の存在に邪魔されないで、且つ計測装置自身の応用
動作として、地中掘削機の初期深度を自動機械化した手
法で極めて正確に計測する方法を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to measure the initial depth of an underground excavator very accurately after installation of a measuring device, without being hindered by the presence of a stabilizing liquid, and as an applied operation of the measuring device itself. Is to provide a way to
【０００８】[0008]
【課題を解決するための手段】上述の課題を解決するた
めの手段として、請求項１に記載した発明に係る地中掘
削機の初期深度計測方法は、地上の固定点から吊り下げ
た計測用ワイヤを地中掘削機の定点と連結して一定張力
を加え、地上の計測器で前記計測用ワイヤの傾きと繰り
出し量を計測することにより地中掘削機の変位を計測す
る方法を実施する当初に、地中掘削機の初期深度を計測
する方法であって、地中掘削機の前記定点に計測用ワイ
ヤ下端の移動装置を設置し、地中掘削機を設置した当初
に地上の計測器が計測した変位量をＳ１とし、計測用ワ
イヤの下端を前記移動装置により既知量ａだけ移動させ
たときに計測器が計測した変位量をＳ２とし、前記固定
点から計測器までの鉛直距離をＬ０とする場合に、地中
掘削機の初期深度Ｌ１は、次の［数１］、 ［数１］ Ｌ１＝ａ×（Ｌ０）／（Ｓ２−Ｓ１）−Ｌ０ により演算して求めることを特徴とする。According to a first aspect of the present invention, there is provided a method for measuring an initial depth of an underground excavator according to the first aspect of the present invention. Initially implementing a method of measuring the displacement of the underground excavator by connecting the wire to the fixed point of the underground excavator and applying a constant tension, measuring the inclination and the extension amount of the measurement wire with a measuring instrument on the ground In the method of measuring the initial depth of the underground excavator, a moving device of the lower end of the measurement wire is installed at the fixed point of the underground excavator, and a measuring instrument on the ground is initially provided when the underground excavator is installed. The amount of displacement measured is S1, the amount of displacement measured by the measuring instrument when the lower end of the measuring wire is moved by the known amount a by the moving device is S2, and the vertical distance from the fixed point to the measuring instrument is L0. And the initial depth of the underground excavator 1, equation [1] Next, and obtaining by calculating the [number 1] L1 = a × (L0) / (S2-S1) -L0.
【０００９】[0009]
【発明の実施形態及び実施例】請求項１に記載した発明
に係る地中掘削機の初期深度計測方法は、上述した特開
平１０−２９９０２８号公報に開示され、また、図１に
原理図を示したように、地上の固定点１から吊り下げた
計測用ワイヤ２を地中掘削機３の定点と連結し適度な張
力を加えてピンと張り、地上の計測器４で前記計測用ワ
イヤ２の傾きと繰り出し量を計測することにより地中掘
削機３の変位を計測する方法を開始する当初に、地中掘
削機３の初期深度を計測する方法として実施される。DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of measuring the initial depth of an underground excavator according to the invention described in claim 1 is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 10-299028, and FIG. As shown, a measurement wire 2 suspended from a fixed point 1 on the ground is connected to a fixed point of an underground excavator 3, and is tensioned by applying an appropriate tension. Initially, when the method of measuring the displacement of the underground excavator 3 by measuring the inclination and the extension amount is started, the method is performed as a method of measuring the initial depth of the underground excavator 3.
【００１０】上記の固定点１及び計測器４を含む変位計
測装置５は、図２に示すように、地中掘削機３が新規の
掘削を開始し、その掘削孔７が地中掘削機３の全高を完
全に沈ませ得る深さとなった後に、同掘削孔７の地上開
口部にその孔をのぞき込む形に設置される。その設置時
点より以降、地中掘削機３の変位計測が開始される。As shown in FIG. 2, in the displacement measuring device 5 including the fixed point 1 and the measuring device 4, the underground excavator 3 starts a new excavation, and After it has reached a depth at which the entire height of the excavation hole can be completely submerged, the excavation hole 7 is installed so as to look into the opening above the ground. From the time of installation, displacement measurement of the underground excavator 3 is started.
【００１１】以下、図３に示す例題線図にしたがい、地
中掘削機の初期深度計測方法の実施形態を説明する。An embodiment of a method for measuring the initial depth of an underground excavator will be described below with reference to the example diagram shown in FIG.
【００１２】変位計測装置５を設置した当初に、測定基
準となる固定点１を通る鉛直線８に対して、地上の計測
器４がその設置レベルで計測した計測用ワイヤ２の変位
量をＳ１とする。同計測用ワイヤ２の下端を既知量ａだ
け移動させたときに前記計測器４が同様に計測した変位
量をＳ２とする。前記固定点１から計測器４までの鉛直
距離をＬ０（これは既知量である）とする場合、地中掘
削機３の未知量（初期深度Ｌ１）は、次の［数１］によ
り演算して求めることができる。When the displacement measuring device 5 is initially installed, the displacement of the measuring wire 2 measured at the installation level by the measuring instrument 4 on the ground with respect to a vertical line 8 passing through the fixed point 1 serving as a measurement reference is represented by S1. And The displacement amount similarly measured by the measuring device 4 when the lower end of the measurement wire 2 is moved by the known amount a is defined as S2. When the vertical distance from the fixed point 1 to the measuring device 4 is L0 (this is a known amount), the unknown amount (initial depth L1) of the underground excavator 3 is calculated by the following [Equation 1]. You can ask.
【００１３】［数１］ 変位量の差をΔｓとすると、Δｓ＝Ｓ２−Ｓ１ Ｌ１＝ａ×（Ｌ０）／Δｓ−Ｌ０ ＝ａ×（Ｌ０）／（Ｓ２−Ｓ１）−Ｌ０[Equation 1] Assuming that the difference between the displacement amounts is Δs, Δs = S2−S1 L1 = a × (L0) / Δs−L0 = a × (L0) / (S2−S1) −L0
【００１４】 一例として前記Δｓ＝５０mmと計測された場合を考える
と、 Ｌ１＝１００×１０００／５０−１０００ ＝１０００mmが得られる。 但し、計測誤差によって、前記Δｓ＝４９．９５mmと計
測された場合は、 Ｌ１＝１００×１０００／４９．９５−１０００ ＝１００２．０mmが得られる。[0014] Considering the case where Δs = 50 mm is measured as an example, L1 = 100 × 1000 / 50−1000 = 1000 mm is obtained. However, when Δs = 49.95 mm is measured due to a measurement error, L1 = 100 × 1000 / 49.95−1000 = 1002.0 mm is obtained.
【００１５】この場合の誤差率を検討すると、１００
２．０−１０００＝２．０の誤差であるから、誤差率
は、２．０／１０００×１００＝０．２％となり、非常
に高い精度で計測されることがわかる。Considering the error rate in this case, 100
Since the error is 2.0-1000 = 2.0, the error rate is 2.0 / 1000 × 100 = 0.2%, which indicates that the measurement is performed with extremely high accuracy.
【００１６】なお、計測用ワイヤ２の下端を、上述した
既知量ａだけ移動させる手段（ワイヤ下端移動装置６）
としては、やはり上述の特開平１０−２９９０２８号公
報に較正装置として開示された、図４に原理図を示した
装置などを応用できる。Means for moving the lower end of the measuring wire 2 by the known amount a (wire lower end moving device 6)
As an example, a device whose principle diagram is shown in FIG. 4 and the like, which is also disclosed as a calibration device in the above-mentioned Japanese Patent Application Laid-Open No. 10-299028, can be applied.
【００１７】このワイヤ下端移動装置６は、地中掘削機
３の上面（の定点）へボルト止め等の手段で固定される
底盤３０に、リングボルト３２などを利用して計測用ワ
イヤ２の下端が止着される。前記底盤３０から垂直に立
ち上がる管体３１の上部外周に、例えば平面的に見て直
交する４箇所の配置で、パルスモータなどを動力源とす
るワイヤ駆動部３３が設置され、このワイヤ駆動部３３
で駆動される制御ワイヤ３６の先端が、計測用ワイヤ２
を通したリング３７と止着され、各々放射状に配置され
ている。つまり、４個のワイヤ駆動部３３の駆動制御に
より、上述の既知量ａが所定の方向に所望量だけ機械的
に発生されるのである。The wire lower end moving device 6 includes a lower end 30 of the measuring wire 2 which is fixed to a top surface (a fixed point) of the underground excavator 3 by means such as bolting using a ring bolt 32 or the like. Is fixed. A wire driving unit 33 that is driven by a pulse motor or the like as a power source is installed at, for example, four positions orthogonal to each other in a plan view on the upper outer periphery of the tube body 31 that rises vertically from the bottom plate 30.
The tip of the control wire 36 driven by the
And are fixed radially. That is, by the drive control of the four wire driving units 33, the above-mentioned known amount a is mechanically generated by a desired amount in a predetermined direction.
【００１８】したがって、本発明に係る地中掘削機の初
期深度計測方法は、変位計測装置の構成をそのまま利用
して、自動機械化した手法で実施でき、地中掘削機の変
位計測方法に必要な深度初期値を簡単に高精度に求める
ことが出来るのである。Therefore, the method of measuring the initial depth of an underground excavator according to the present invention can be carried out by an automatic mechanized method using the configuration of the displacement measuring device as it is, and is necessary for the method of measuring the displacement of an underground excavator. The initial depth value can be easily obtained with high accuracy.
【００１９】[0019]
【本発明が奏する効果】請求項１に記載した発明に係る
地中掘削機の初期深度計測方法によれば、計測装置の設
置後に、掘削孔に満たした地盤安定液の存在に邪魔され
ることなく、計測装置自身の応用動作として、地中掘削
機の初期値深度を、自動機械化した手法で簡単に極めて
正確に計測することができ、以後の地中掘削機による掘
削工事の円滑で高精度な施工管理を可能にするのであ
る。According to the method of measuring the initial depth of an underground excavator according to the present invention, after installation of the measuring device, it is obstructed by the presence of the ground stabilizing liquid filled in the excavation hole. As an applied operation of the measuring device itself, the initial depth of the underground excavator can be measured easily and extremely accurately by an automatic mechanized method, and the subsequent excavation work with the underground excavator is smooth and highly accurate. It allows for the efficient construction management.
【図１】地中掘削機の掘削精度測定方法及び装置の原理
説明図である。FIG. 1 is a diagram illustrating the principle of a method and an apparatus for measuring the excavation accuracy of an underground excavator.
【図２】本発明に係る計測方法の実施要領図である。FIG. 2 is a view showing an outline of a measuring method according to the present invention.
【図３】本発明の計測原理説明図である。FIG. 3 is an explanatory view of a measurement principle of the present invention.
【図４】ワイヤ下端移動装置の実施例である。FIG. 4 is an embodiment of a wire lower end moving device.
１ 固定点 ２ 計測用ワイヤ ３ 地中掘削機 ４ 計測器 ６ ワイヤ下端の移動装置 DESCRIPTION OF SYMBOLS 1 Fixed point 2 Measurement wire 3 Underground excavator 4 Measuring instrument 6 Moving device of wire lower end
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮口 幹太 千葉県印西市大塚一丁目５番地１ 株式会 社竹中工務店技術研究所内 (72)発明者 藤井 卓美 千葉県印西市大塚一丁目５番地１ 株式会 社竹中工務店技術研究所内 (72)発明者 門中 章二 東京都中央区銀座八丁目21番１号 株式会 社竹中土木内 (72)発明者 大西 常康 東京都中央区銀座八丁目21番１号 株式会 社竹中土木内 (72)発明者 濱渦 好夫 高知県高知市塩田町１番６号 大容基功工 業株式会社内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenta Miyaguchi 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Takenaka Corporation Technical Research Institute (72) Inventor Takumi Fujii 1-5-1, Otsuka, Inzai City, Chiba Prefecture Takenaka Corporation Technical Research Institute Co., Ltd. 21 No. 1 Takenaka Civil Engineering Co., Ltd. (72) Inventor Yoshio Hamazuzu 1-6 Shioda-cho, Kochi-city, Kochi Pref.
Claims (1)
を地中掘削機の定点と連結して一定張力を加え、地上の
計測器で前記計測用ワイヤの傾きと繰り出し量を計測す
ることにより地中掘削機の変位を計測する方法を実施す
る当初に、地中掘削機の初期深度を計測する方法であっ
て、 地中掘削機の前記定点に計測用ワイヤ下端の移動装置を
設置し、地中掘削機を設置した当初に地上の計測器が計
測した変位量をＳ１とし、計測用ワイヤの下端を前記移
動装置により既知量ａだけ移動させたときに計測器が計
測した変位量をＳ２とし、前記固定点から計測器までの
鉛直距離をＬ０とする場合に、地中掘削機の初期深度Ｌ
１は、次の［数１］、 ［数１］ Ｌ１＝ａ×（Ｌ０）／（Ｓ２−Ｓ１）−Ｌ０ により演算して求めることを特徴とする、地中掘削機の
初期深度計測方法。1. A measuring wire suspended from a fixed point on the ground is connected to a fixed point of an underground excavator to apply a constant tension, and a measuring instrument on the ground is used to measure the inclination and the feeding amount of the measuring wire. Initially implementing the method of measuring the displacement of the underground excavator by, is a method of measuring the initial depth of the underground excavator, a moving device of the lower end of the measurement wire is installed at the fixed point of the underground excavator The displacement amount measured by the measuring instrument on the ground at the beginning of the installation of the underground excavator is defined as S1, and the displacement measured by the measuring instrument when the lower end of the measuring wire is moved by the known amount a by the moving device. S2, when the vertical distance from the fixed point to the measuring instrument is L0, the initial depth L of the underground excavator
1 is an initial depth measurement method for an underground excavator, which is calculated by the following [Equation 1] and [Equation 1] L1 = a × (L0) / (S2−S1) −L0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30454899A JP4355063B2 (en) | 1999-10-26 | 1999-10-26 | Initial depth measurement method of underground excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30454899A JP4355063B2 (en) | 1999-10-26 | 1999-10-26 | Initial depth measurement method of underground excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001123785A true JP2001123785A (en) | 2001-05-08 |
| JP4355063B2 JP4355063B2 (en) | 2009-10-28 |
Family
ID=17934328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30454899A Expired - Fee Related JP4355063B2 (en) | 1999-10-26 | 1999-10-26 | Initial depth measurement method of underground excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596110A (en) * | 2020-12-30 | 2021-04-02 | 江苏金地勘测有限公司 | Multifunctional depth determination device for underground pipeline detection and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195410B (en) * | 2013-04-03 | 2015-11-18 | 郑州士奇测控技术有限公司 | A kind of well depth or hole depth measurement device and measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596110A (en) * | 2020-12-30 | 2021-04-02 | 江苏金地勘测有限公司 | Multifunctional depth determination device for underground pipeline detection and use method thereof |
| CN112596110B (en) * | 2020-12-30 | 2023-08-22 | 江苏金地勘测有限公司 | Multifunctional depth determining device for underground pipeline detection and application method thereof |
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| JP4355063B2 (en) | 2009-10-28 |
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