JP3534610B2 - Drilling promotion method and equipment - Google Patents
Drilling promotion method and equipmentInfo
- Publication number
- JP3534610B2 JP3534610B2 JP14659498A JP14659498A JP3534610B2 JP 3534610 B2 JP3534610 B2 JP 3534610B2 JP 14659498 A JP14659498 A JP 14659498A JP 14659498 A JP14659498 A JP 14659498A JP 3534610 B2 JP3534610 B2 JP 3534610B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- earth
- plate
- excavator
- pipes
- 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
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セミシールド工法
・推進工法と称されている地中の掘削推進工法であっ
て、掘削機の後方に鋼管又はヒューム管のパイプを複数
直列に連結し、最後尾のパイプを立坑内でジャッキで推
進方向に押し込んで、掘削機で掘削させながら全体を前
進させ、又パイプを最後尾に補充連結して長くして、長
い地中トンネルを掘削する工法及びそのための装置に関
し、下水道・地下道・小中のトンネル・地下ケーブルト
ンネル等の構築に有用である。TECHNICAL FIELD The present invention relates to an underground excavation propulsion method called a semi-shield construction method / propulsion method, in which a plurality of steel pipes or fume pipes are connected in series behind an excavator, Push the rearmost pipe in the shaft in the direction of propulsion with a jack, move the whole forward while excavating with an excavator, and replenish and connect the pipe to the rear to lengthen it, and construct a long underground tunnel. Regarding equipment for that purpose, it is useful for constructing sewers, underpasses, small and medium tunnels, underground cable tunnels, etc.
【０００２】[0002]
【従来の技術】従来のこの種の掘削工法では、削孔が長
くなってくると、パイプと削孔の孔壁との摩擦抵抗が大
きくなり、推進に必要なジャッキの力が増大し、掘削装
置が後続のパイプ破損等で推進できなくなることが発生
する。摩擦抵抗の増大は、削孔の孔壁が崩落したり、掘
削排土が廻り込んでパイプの外周と孔壁との間の空隙を
埋めて摩擦力を増大させることに原因することが多い。
特に、屈曲した地下トンネルを削孔するときは、この傾
向が大きい。従来、この問題を解消させるためパイプの
外周に滑材を充填する方法を採用しているがパイプ外周
の空隙に土砂が詰まると滑材の充填が均一にできず、滑
材による充分な摩擦力の低下の効果が期待できなかっ
た。又、これを避るべく削孔をパイプ径よりかなり大き
くすることは、削孔量が大きくなり、空隙充填等に費用
がかかり工事費用を高くし、又削孔崩壊が起り易くなる
という問題点があった。2. Description of the Related Art In the conventional excavation method of this type, as the drilling length increases, the frictional resistance between the pipe and the hole wall of the drilling hole increases, and the jacking force required for propulsion increases. The device may not be able to be propelled due to subsequent pipe damage or the like. The increase in the frictional resistance is often caused by the collapse of the hole wall of the drilled hole or the excavated soil flowing around and filling the gap between the outer circumference of the pipe and the hole wall to increase the frictional force.
This tendency is particularly large when drilling a bent underground tunnel. Conventionally, in order to solve this problem, a method of filling the outer circumference of the pipe with a lubricant has been adopted, but if the voids on the outer circumference of the pipe are clogged with earth and sand, the lubricant cannot be uniformly filled, and a sufficient friction force due to the lubricant is used. I could not expect the effect of the decrease. Also, to avoid this, making the hole much larger than the pipe diameter causes a problem that the hole amount becomes large, the cost for filling voids becomes high, the construction cost becomes high, and the hole collapse easily occurs. was there.
【０００３】[0003]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、従来のこれらの問題を解消し、パイプの推
進力が小さな力で済み且つ推進を円滑にでき、しかも崩
壊が少なく安定した長距離の掘削が可能となり、又屈曲
した削孔でも容易に推進させることができる掘削推進工
法及びその装置を提供することにある。SUMMARY OF THE INVENTION The problems to be solved by the present invention are to solve these problems of the prior art, to reduce the propulsive force of the pipe, to make the propulsion smooth, and to stabilize the pipe with little collapse. An object of the present invention is to provide an excavation propulsion method and an apparatus therefor that enable long-distance excavation and that can easily propel even a bent hole.
【０００４】[0004]
【課題を解決するための手段】かかる課題を解決した本
発明の構成は、
１） 先端の掘削機後端に複数の同径のパイプを直列に
連結し、掘削機で地盤を掘削しながら最後尾のパイプを
ジャッキで推進方向に押し込んで全体を前進させ、所定
長さ前進する毎にパイプを最後尾に追加して長い地中ト
ンネルを削孔する掘削推進工法に於いて、パイプ列の途
中に削孔内で且つパイプ外周面より外方となる位置まで
先端が先細りとなって前面が傾斜した排土板をパイプ外
周面から突出拡巾させ、排土板の後方のパイプ外周部に
滑材を注入させながらパイプ列を前進させることによ
り、排土板はその前方のパイプ外周の土砂を圧密させ且
つ後方のパイプ外周部を再掘削して滑材を外周部の再掘
削後の空間に充填させ、排土板に作用するパイプ半径方
向の力を計測する圧力センサーを設け、同圧力センサー
の計測圧が設定圧以上にならないように排土板の突出量
を制御し、地山の崩壊を防ぎながらパイプの摩擦力を低
減してパイプを円滑に長距離推進できるようにしたこと
を特徴とする掘削推進工法
２） 排土板として、パイプ外周部に出没自在に装置さ
れたものを使用し、必要時に突出させるようにした前記
１）記載の掘削推進工法
３） 排土板がパイプの下部外周とパイプの頂部の部分
においてパイプ外方へ突出拡巾するようにした前記１）
又は２）記載の掘削推進工法
４） パイプ同士を変向可能に連結してパイプ列を弯曲
しながら屈曲した地中トンネルを削孔できるようにした
前記１）〜３）いずれか記載の掘削推進工法
５） 先端の掘削機の後端に複数の同径のパイプを直列
に連結し、最後尾のパイプを推進する方向に押し込むジ
ャッキを設け、パイプ列の外周部に先端が先細りとなっ
て前面が傾斜した排土板をパイプ外周から突出できるよ
うに設け、パイプの後端部とこれと連結されるパイプの
前端部とに中間を陥凹した連結筒を少なくとも一方パイ
プに対し摺動自在に且つ水密を保持する状態に嵌装し、
同連結筒の陥凹部に排土板を出没自在に配置し、同排土
板を進退するロッドを連結筒に貫通させ、ロッドの連結
筒内側にこれを進退させる油圧シリンダーを設けた掘削
装置
６） 先端の掘削機の後端に複数の同径のパイプを直列
に連結し、最後尾のパイプを推進する方向に押し込むジ
ャッキを設け、パイプ列の外周部に先端が先細りとなっ
て前面が傾斜した排土板をパイプ外周から突出できるよ
うに設け、排土板に作用するパイプ半径方向に作用する
力を計測する圧力センサーを設け、同圧力センサーの圧
力値が設定圧力値を超えると排土板の突出量を小さくす
るようにして設定圧力値を超えないように排土板の突出
量を制御する制御部を備えた掘削装置
７） 排土板が、パイプの下部の外周部分とパイプの頂
部部分においてパイプ外周面から出没自在に装置された
前記５）又は６）記載の掘削装置
８） パイプ同士を変向可能にジャッキで連結し、屈曲
した地中トンネルを削孔できるようにした前記５）〜
７）いずれか記載の掘削装置にある。[Means for Solving the Problems] The structure of the present invention which has solved the above problems is as follows: 1) A plurality of pipes having the same diameter are connected in series at the rear end of an excavator at the tip, and while excavating the ground by the excavator, In the excavation and propulsion method, in which the tail pipe is pushed in the propulsion direction with a jack to advance the whole, and every time it advances a predetermined length, a pipe is added to the end to drill a long underground tunnel. and the pipe outer peripheral surface of a blade of the front is inclined distal end to outside a position that tapers to a pipe outer peripheral surface or et butt out拡巾than the rear of the pipe outer peripheral portion of a blade in the drilling in By advancing the row of pipes while injecting the lubricant into the pipe, the soil discharge plate consolidates the soil around the pipe in front of it and re-excavates the outer periphery of the rear pipe to re-excite the lubricant after re-excavation of the outer periphery. Radial direction of the pipe that fills the space and acts on the dump plate
Equipped with a pressure sensor that measures the force in the same direction
The amount of protrusion of the earth removal plate so that the measured pressure of
The excavation propulsion method is characterized in that the pipe friction is reduced and the pipe is smoothly propelled for a long distance while controlling the ground collapse. The excavation and propulsion method described in 1) above, which uses a freely installed device and is made to project when necessary. 3) The earth scavenging plate projects and expands outside the pipe at the lower outer periphery of the pipe and the top of the pipe. The above 1)
Or the excavation propulsion method described in 2) 4) Curved pipe rows by connecting pipes so that they can be turned.
However, a bent underground tunnel can be drilled. <br /> 5) The excavation propulsion method according to any one of 1) to 3), 5) A plurality of pipes of the same diameter are connected in series at the rear end of the tip excavator.
And push the rearmost pipe in the direction to propel it.
A jack is provided and the tip is tapered on the outer periphery of the pipe row.
You can project the earth sloping plate whose front surface is inclined from the outer circumference of the pipe.
Of the pipe connected to the rear end of the pipe
Connect at least one connecting cylinder with a recess in the middle to the front end.
Fits in a slidable and watertight state with respect to the
The earth removal plate is placed in the recess of the connecting cylinder so that it can be retracted.
Connect the rods by moving the plates back and forth through the connecting tube.
Excavator equipped with a hydraulic cylinder that advances and retracts this inside the cylinder 6) A plurality of pipes of the same diameter are connected in series at the rear end of the excavator at the tip, and a jack that pushes the rearmost pipe in the propelling direction is provided. distal to the outer peripheral portion of the pipe string tapers provided to the soil removing board front is inclined can exit pipe periphery or et collision acts on the pipe radially acting on a blade
A pressure sensor that measures the force is installed, and the pressure of the pressure sensor
If the force value exceeds the set pressure value, the amount of protrusion of the soil discharge plate will be reduced.
So that the set pressure value is not exceeded
Excavator equipped with a control unit for controlling the amount 7) The excavator according to 5) or 6), wherein the earth-discharging plate is retractable from the outer peripheral surface of the pipe at the outer peripheral portion of the lower portion of the pipe and the top portion of the pipe. 8) connecting the pipes together deflection capable in jack, and to allow drilling a bent underground tunnel above 5) -
7) The excavation device according to any one of the above.
【０００５】[0005]
【作用】本発明では、パイプ外周に排土板をパイプ外周
から突出拡巾させている。従ってパイプの列を前進させ
ると、排土板の前方のパイプ外周の削孔後に埋まった土
砂を前方に押し込んで前方の土砂を圧密状態とし、パイ
プ外周と削孔との間を圧密した土砂で埋めて削孔の崩壊
がないようにする。排土板の後方は、排土板によって外
周と削孔孔壁との間を埋める土砂を前方へ押し込むよう
に排除し内周壁部分を再掘削して、排土板後方に空間を
形成する。この後方空間に滑材が注入されるので排土板
の後方は滑材が多量に且つ均一に充填され、パイプと削
孔との間の抵抗を大巾に小さくする。これによってパイ
プの推進力は小さくて済み、大巾に長距離のパイプ推進
が可能となる。又曲がった削孔の掘削も容易に行えるよ
うにしている。排土板をパイプ外周部より出没自在にす
る装置を用いれば、排土板の突出が逆に抵抗となった
り、支障となる場合においては排土板をパイプ外周面か
ら突出しないように内側に退去させることで排土板の突
出による悪影響を避けることができる。排土板の突出位
置は、土砂が埋まりがちな削孔の下部が有効であり、又
削孔頂部に設けると削孔の崩壊を少なくできて好まし
い。又排土板はパイプ同士の連結部に設けるのが、パイ
プの大きな加工を不要にして簡単に取付けられるのでよ
い。圧力センサ−を設けて排土板に適度な荷重が作用す
る場合排土板の突出量を小さくすることで、無理のない
推進を可能にできる。In the present invention, the earth discharging plate is formed on the outer circumference of the pipe so as to project and widen from the outer circumference of the pipe. Therefore, when the row of pipes is moved forward, the earth and sand buried after drilling the outer circumference of the pipe in front of the soil discharging plate is pushed forward to make the front earth and sand compact, and the space between the outer circumference of the pipe and the hole is compacted. Fill it to prevent collapse of the hole. In the rear of the soil scavenging plate, the soil scavenging plate is used to remove the earth and sand filling the space between the outer periphery and the hole hole wall so as to be pushed forward, and the inner peripheral wall portion is re-excavated to form a space behind the soil scavenging plate. Since the lubricant is injected into this rear space, a large amount of the lubricant is uniformly filled in the rear of the soil discharge plate, and the resistance between the pipe and the drilled hole is greatly reduced. As a result, the propelling force of the pipe is small, and it is possible to propel the pipe over a long distance. It also makes it easy to excavate curved holes. If a device that allows the soil discharge plate to be retracted from the pipe outer periphery is used, in case the protrusion of the soil discharge plate becomes a resistance or becomes an obstacle, the soil discharge plate should be placed inside so that it does not protrude from the pipe outer peripheral surface. By moving it away, it is possible to avoid the adverse effect of the protruding earth dumping plate. The protruding position of the soil discharge plate is effective in the lower part of the drilled hole where the earth and sand tend to be buried, and it is preferable to provide it at the top of the drilled hole because collapse of the drilled hole can be reduced. Further, the earth-discharging plate is provided at the connecting portion of the pipes, because it is easy to attach the earth-discharging plate without requiring large processing of the pipe. When an appropriate load is applied to the soil discharge plate by providing a pressure sensor, the amount of protrusion of the soil discharge plate can be reduced to enable reasonable propulsion.
【０００６】[0006]
【発明の実施の形態】本発明の排土板は、パイプの円周
方向に沿って複数に分割して設けるのが出没させること
が容易となって好ましい。又排土板は削孔との抵抗が最
も高いパイプ下部に設けるのが効果的である。排土板は
パイプの全外周に設けてもよいが、外周の一部のみであ
ってもよい。又排土板のパイプ長手方向での取付位置
は、パイプ同士の連結部に配置することが好ましく、連
結部に連結筒を取付け、同連結筒の外側に排土板を、又
同排土板を進退駆動する油圧シリンダー等は連結筒内に
配置し、両者を連接するロッドを水密性があるように連
結筒を貫通させるのが、土砂・滑材が油圧シリンダーに
接触せず故障がなく好ましい。排土板のパイプ外周面か
らの突出量は、１０ミリ〜５０数ミリ程である。又パイ
プ列の１５０ｍ（メートル）間隔毎に排土板を設けるの
が効果的である。滑材としては、粒状滑材・高分子滑材
・２液性滑材が使用される。BEST MODE FOR CARRYING OUT THE INVENTION It is preferable that the earth discharging plate of the present invention is divided into a plurality of pieces along the circumferential direction of the pipe because it is easy to project and retract. Also, it is effective to install the earth-discharging plate in the lower part of the pipe, which has the highest resistance to drilling. The earth-discharging plate may be provided on the entire outer circumference of the pipe, but may be a part of the outer circumference. Further, the mounting position of the earth scavenger plate in the longitudinal direction of the pipe is preferably located at the connecting portion between the pipes, and the connecting cylinder is attached to the connecting portion, and the earth scavenging plate and the earth scavenging plate on the outside of the connecting cylinder. It is preferable to dispose the hydraulic cylinder that drives the cylinder back and forth in the connecting cylinder, and to penetrate the connecting cylinder so that the rod connecting both is watertight, because there is no failure because the sand and lubricant do not contact the hydraulic cylinder. . The amount of protrusion of the soil discharging plate from the outer peripheral surface of the pipe is about 10 mm to 50 mm. Further, it is effective to provide an earth discharging plate at intervals of 150 m (meter) in the pipe row. As the lubricant, a granular lubricant, a polymer lubricant, or a two-component lubricant is used.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は、実施例の作業状態を示す説明図である。
図２は、実施例のパイプ連結部を示す断面図である。図
３は、実施例の排土板を突出させた状態の要部説明図で
ある。図４は図２の拡大Ａ−Ａ断面図である。図５は実
施例の排土板をパイプ内に退却させた状態の説明図であ
る。本実施例は、隣り合うパイプの後端と前端との間で
摺動し且つ変向可能に取付けられた連結筒の中間の陥凹
部の外側の下部外周と上方頂部とに排土板を出没自在に
取付け、連結筒の内部に油圧シリンダーを設け、同油圧
シリンダーのロッドを連結筒を貫通して排土板に連接
し、又油圧シリンダーの油圧回路途中に油圧センサーを
設け、同油圧センサーの圧力が設定圧力を超えると油圧
シリンダーのロッドを退却する方向に油圧シリンダーを
制御する制御部を備えた例である。図中１は先端の掘削
機、２は同掘削機の後端に直列に変向自在に連結された
外周８００ミリの鋼製パイプ、３は同パイプ同士の連結
部、３ａは連結筒、３ｂは同連結筒の中間の５０ｍｍ巾
の陥凹部、３ｃはパッキン、３ｄは変向自在にパイプ間
を連結する油圧ジャッキ、４は排土板、４ａは同排土板
に固着されたロッド、４ｂは同ロッドの貫通孔、４ｃは
排土板４の先端の傾斜した先細り部、５はロッド４ａを
進退して排土板４を出没自在とする油圧ジャッキ、５ａ
は同油圧ジャッキ５の油圧回路に設けた圧力センサー、
５ｂは制御部である。６は滑材の注入パイプで、陥凹部
３ｂの底面で開口している。７は立坑、８は立坑内に設
置した推進用油圧ジャッキである。この実施例では、パ
イプ列のパイプ２間は前方パイプ２の後端に連結筒３ａ
を前方部分を嵌入し、前方のパイプ２とボルト（図示せ
ず）で連結している。連結筒３ａの後部分は後方パイプ
２の前端に嵌入し、その間にパッキン３ｃを介在させて
いて、前方パッキン２と後方パイプ２との相互移動を許
容させながら、土砂Ｓ・滑材のパイプ内への進入を防止
している。又パイプ２間には複数の油圧でジャッキ３ｄ
が架設され、油圧ジャッキ３ｄの伸縮の調整でパイプ２
間を折曲するように変向した状態に連結できるものと
し、パイプ列を屈曲させることができるようになってい
る。掘削作業は、立坑７から掘削機１及びパイプ２を降
して連結し、最後尾のパイプ２を推進用油圧ジャッキ８
によって推進方向に押し込む。同油圧ジャッキ８の推進
力は最後尾のパイプ２及びパイプ２間の油圧ジャッキ３
ｄを介して前方のパイプ２及び先端の掘削機１まで伝達
され、全体が前進させられる。掘削機１によって地盤を
掘削し、パイプ２内部の排土コンベヤ（図示せず）で排
土しながら掘り進めながら前記の油圧ジャッキ８によっ
て全体を前進させる。推進方向を変えるときは、パイプ
２間の複数の油圧ジャッキ３ｄの伸長の長さを円周位置
で変えることでできるようになっている。排土板４は１
５０ｍ程間隔離してパイプ列のパイプ連結部３に３〜４
個所設けられている。排土板４を突出させるときは、パ
イプ連結部３内の油圧ジャッキ５を作動させ、ロッド４
ａを長く伸長してロッド４ａに固着した排土板４を１５
ミリ程パイプ２外周面より突出させる。排土板４はパイ
プ２の下部外周に４個所設けられ、又パイプ２の頂部１
個所設けられている。この排土板４をパイプ２の外周面
から１５ミリ程外方へ突出させる。この状態では、パイ
プ外周の土砂Ｓ・滑材Ｇがパイプ２内への進入するのを
連結筒３ａによって遮断している。この状態でパイプ列
が前進すると、排土板４は前方にある土砂Ｓ・滑材等を
前方へ押し込んで圧密し、パイプ２と削孔との間を圧密
された土砂で支持して削孔の崩れを防止している。排土
板４の後方は１５ミリ程の空間が強制的に排除され、注
入パイプ６から送られた滑材Ｇが充填され、パイプと削
R>孔との間の摩擦を少なくする。又削孔の崩れを滑材充
填で防止する。この滑材Ｇは削孔の下部に主に充填さ
れ、パイプの推進摩擦を大巾に低減する。又、排土板４
の油圧ジャッキ５の油圧回路の圧力センサ−５ａは、排
土板４に作用する半径方向の力を計測し、その圧力計測
値を制御部５ｂに入力し、設定圧力以上になっていれば
油圧ジャッキ５を作動させて排土板４をパイプ内側へ少
し引き込み、突出量を小さくし、排土板４に過大な負荷
が作用しないようにしている。この実施例によれば、従
来の削孔距離の２倍程の１ｋｍ以上の掘削を可能にでき
た。又屈曲した地下トンネルの掘削も容易となった。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a working state of the embodiment.
FIG. 2 is a cross-sectional view showing the pipe connecting portion of the embodiment. FIG. 3 is an explanatory view of a main part of a state in which the earth discharging plate of the embodiment is projected. FIG. 4 is an enlarged AA sectional view of FIG. FIG. 5 is an explanatory view showing a state in which the soil discharging plate of the embodiment is retracted into the pipe. In the present embodiment, the earth-discharging plate is projected and retracted on the lower outer periphery and the upper apex outside the recessed portion in the middle of the connecting cylinder that is slidably and deflectably mounted between the rear ends and the front ends of the adjacent pipes. Install freely, install a hydraulic cylinder inside the connecting cylinder, connect the rod of the hydraulic cylinder through the connecting cylinder and connect to the soil plate, and install a hydraulic sensor in the middle of the hydraulic circuit of the hydraulic cylinder. This is an example provided with a control unit for controlling the hydraulic cylinder in a direction to retract the rod of the hydraulic cylinder when the pressure exceeds the set pressure. In the figure, 1 is an excavator at the tip, 2 is a steel pipe with an outer circumference of 800 mm, which is connected to the rear end of the excavator so that it can be turned in series, 3 is a connecting portion between the pipes, 3a is a connecting cylinder, 3b Is a recess of 50 mm width in the middle of the connecting cylinder, 3c is packing, 3d is a hydraulic jack for connecting pipes in a freely diverting manner, 4 is an earth discharging plate, 4a is a rod fixed to the earth discharging plate, 4b Is a through hole of the rod, 4c is a tapered portion of the tip of the earth scavenging plate 4, and 5 is a hydraulic jack 5a which allows the earth scavenging plate 4 to be retracted by advancing and retracting the rod 4a.
Is a pressure sensor provided in the hydraulic circuit of the hydraulic jack 5,
5b is a control unit. Reference numeral 6 denotes a lubricant injection pipe, which is opened at the bottom of the recess 3b. Reference numeral 7 is a vertical shaft, and 8 is a hydraulic jack for propulsion installed in the vertical shaft. In this embodiment, between the pipes 2 in the pipe row, a connecting pipe 3a is provided at the rear end of the front pipe 2.
The front portion is fitted and is connected to the front pipe 2 by a bolt (not shown). The rear part of the connecting cylinder 3a is fitted into the front end of the rear pipe 2, and the packing 3c is interposed therebetween, and the front packing 2 and the rear pipe 2 are allowed to move with each other, and the inside of the pipe of earth and sand S / lubricant is allowed. To prevent entry. Moreover, the jack 3d is provided between the pipes 2 by a plurality of hydraulic pressures.
Is installed, and the pipe 2 is adjusted by adjusting the expansion and contraction of the hydraulic jack 3d.
The pipe rows can be bent so that they can be connected in a state of being bent so as to bend between them. For excavation work, the excavator 1 and the pipe 2 are lowered from the vertical shaft 7 and connected, and the last pipe 2 is connected to the hydraulic jack 8 for propulsion.
Push in the direction of propulsion. The propulsive force of the hydraulic jack 8 is the rearmost pipe 2 and the hydraulic jack 3 between the pipes 2.
It is transmitted to the pipe 2 at the front and the excavator 1 at the tip via d, and the whole is advanced. The ground is excavated by the excavator 1, and the whole is moved forward by the hydraulic jack 8 while excavating while excavating the soil by the soil discharging conveyor (not shown) inside the pipe 2. When changing the propulsion direction, it is possible to change the extension length of the plurality of hydraulic jacks 3d between the pipes 2 at the circumferential position. Earth plate 4 is 1
Isolate for about 50m and add 3-4 to the pipe connecting part 3 of the pipe row.
It is provided in several places. When projecting the earth-discharging plate 4, the hydraulic jack 5 in the pipe connecting portion 3 is operated to move the rod 4
a is extended and the earth removal plate 4 fixed to the rod 4a is
It is made to project from the outer peripheral surface of the pipe 2 by about a millimeter. The earth-discharging plate 4 is provided at four places on the outer periphery of the lower part of the pipe 2, and the top part 1 of the pipe 2
It is provided in several places. The earth discharging plate 4 is projected outward from the outer peripheral surface of the pipe 2 by about 15 mm. In this state, the coupling cylinder 3a blocks the entry of the earth and sand S and the lubricant G on the outer circumference of the pipe into the pipe 2. When the pipe row moves forward in this state, the earth scavenging plate 4 pushes forward the soil S / slipping material and the like to consolidate it, and the space between the pipe 2 and the drilled hole is supported by the compacted sand and drilled. It prevents the collapse of. A space of about 15 mm is forcibly excluded behind the soil discharge plate 4, and the lubricant G sent from the injection pipe 6 is filled to remove the pipe and the scraping.
R> Reduce friction between holes. Also, collapse of drilling holes is prevented by filling with lubricant. The lubricant G is mainly filled in the lower part of the drilled hole to greatly reduce the propulsive friction of the pipe. Also, the earth removal plate 4
The pressure sensor-5a in the hydraulic circuit of the hydraulic jack 5 measures the radial force acting on the soil discharge plate 4, inputs the measured pressure value into the control unit 5b, and when the pressure is equal to or higher than the set pressure, the hydraulic pressure is increased. The jack 5 is actuated to pull the earth-discharging plate 4 slightly inside the pipe to reduce the amount of protrusion so that an excessive load does not act on the earth-discharging plate 4. According to this embodiment, excavation of 1 km or more, which is about twice the conventional drilling distance, was possible. It also makes it easier to excavate a bent underground tunnel.
【０００８】[0008]
【発明の効果】以上の様に、本発明によれば、掘削機の
後のパイプ列の途中に排土板をパイプ外周から突出させ
て推進させ、又その後方から滑材を注入することで、確
実に滑材が充填できることとなり、パイプ列の摩擦抵抗
が大巾に低減でき、又排土板前方の土砂の圧密と後方の
滑材の充填で削孔を安定させることができ、よって従来
の２倍程以上の長距離の掘進を可能とし、又屈曲した地
下トンネルの掘削も容易にできた。排土板を出没自在に
したものは、排土板をパイプ内側に収納できるので排土
板を使用しない場所、使用しない方がよい場所で排土板
を退却させて支障がないようにできる。中間に陥凹部の
ある連結筒でもってパイプを連接し、しかも連結筒の陥
凹部に排土板を配置し、連結部の内側にその進退する油
圧ジャッキを配し、ロッドで貫通して両者を連結するも
のは、油圧ジャッキ等のパイプ内部物に土砂・滑材の進
入するのを効果的に防止している。更に排土板に作用す
る力を計測する圧力センサ−を設け、その計測圧が設定
圧以上にならないように制御部で排土板の突出量を調整
するものは、無理のない排土板の突出にでき、円滑な推
進を可能とする。As described above, according to the present invention, the earth discharging plate is projected from the outer circumference of the pipe to be propelled in the middle of the pipe row after the excavator, and the lubricant is injected from the rear side. Since the lubricant can be reliably filled, the frictional resistance of the pipe row can be greatly reduced, and the hole can be stabilized by consolidating the sand in the front of the drainage plate and filling the lubricant in the rear. It is possible to excavate over a long distance of more than twice as long as the above, and it is also easy to excavate a bent underground tunnel. Since the earth-discharging plate can be retracted and retracted, the earth-discharging plate can be stored inside the pipe, so that the earth-discharging plate can be retracted in a place where the earth-discharging plate is not used or a place where it should not be used so that there is no trouble. Connect the pipes with a connecting cylinder with a recess in the middle, and arrange the soil discharging plate in the recess of the connecting cylinder, arrange the hydraulic jack that advances and retracts inside the connecting part, and penetrate it with a rod to connect both The connected one effectively prevents the entry of earth and sand and lubricant into the inside of the pipe such as the hydraulic jack. In addition, a pressure sensor that measures the force acting on the soil discharge plate is provided, and a control unit that adjusts the protrusion amount of the soil discharge plate so that the measured pressure does not exceed the set pressure is a reasonable earth displacement plate. It is possible to project and enable smooth propulsion.
【図１】実施例の作業状態を示す説明図である。FIG. 1 is an explanatory diagram showing a working state of an embodiment.
【図２】実施例のパイプ連結部を示す断面図である。FIG. 2 is a cross-sectional view showing a pipe connecting portion of the embodiment.
【図３】実施例の排土板を突出させた状態の要部説明図
である。FIG. 3 is an explanatory view of a main part of a state in which an earth discharging plate of the embodiment is projected.
【図４】図２の拡大Ａ−Ａ断面図である。FIG. 4 is an enlarged AA sectional view of FIG.
【図５】実施例の排土板をパイプ内に退却させた状態の
説明図である。FIG. 5 is an explanatory diagram showing a state in which the soil discharge plate of the embodiment is retracted into the pipe.
１ 掘削機 ２ パイプ ３ 連結部 ３ａ 連結筒 ３ｂ 陥凹部 ３ｃ パッキン ３ｄ 油圧ジャッキ ４ 排土板 ４ａ ロッド ４ｂ 貫通孔 ４ｃ 先細り部 ５ 油圧ジャッキ ５ａ 圧力センサ− ５ｂ 制御部 ６ 注入パイプ ７ 立抗 ８ 油圧ジャッキ 1 excavator 2 pipes 3 connection 3a Connection tube 3b recess 3c packing 3d hydraulic jack 4 soil plate 4a rod 4b through hole 4c tapered portion 5 hydraulic jack 5a Pressure sensor 5b Control unit 6 injection pipes 7 Standing 8 hydraulic jack
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−146785（ＪＰ，Ａ) 特開 平９−41874（ＪＰ，Ａ) 特開 平11−117669（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) E21D 9/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-146785 (JP, A) JP-A-9-41874 (JP, A) JP-A-11-117669 (JP, A) (58) Field (Int.Cl. 7 , DB name) E21D 9/06
Claims (8)
を直列に連結し、掘削機で地盤を掘削しながら最後尾の
パイプをジャッキで推進方向に押し込んで全体を前進さ
せ、所定長さ前進する毎にパイプを最後尾に追加して長
い地中トンネルを削孔する掘削推進工法に於いて、 パイプ列の途中に削孔内で且つパイプ外周面より外方と
なる位置まで先端が先細りとなって前面が傾斜した排土
板をパイプ外周面から突出拡巾させ、排土板の後方のパ
イプ外周部に滑材を注入させながらパイプ列を前進させ
ることにより、排土板はその前方のパイプ外周の土砂を
圧密させ且つ後方のパイプ外周部を再掘削して滑材を外
周部の再掘削後の空間に充填させ、排土板に作用するパ
イプ半径方向の力を計測する圧力センサーを設け、同圧
力センサーの計測圧が設定圧以上にならないように排土
板の突出量を制御し、地山の崩壊を防ぎながらパイプの
摩擦力を低減してパイプを円滑に長距離推進できるよう
にしたことを特徴とする掘削推進工法。1. A plurality of pipes having the same diameter are connected in series at the rear end of an excavator at the tip, and while excavating the ground by the excavator, the last pipe is pushed in the propulsion direction with a jack to advance the whole, In the excavation propulsion method in which a long underground tunnel is drilled by adding a pipe to the end every time the length advances, the tip is reached in the middle of the pipe row to a position inside the hole and outside the outer peripheral surface of the pipe. There is拡巾out collision et or pipe outer peripheral surface of a blade of the front is inclined tapers, by advancing the pipe string while injecting lubricant to the rear of the pipe outer peripheral portion of a blade, earth removal The plate consolidates the soil on the outer circumference of the pipe in front of it and re-excavates the outer periphery of the pipe at the rear to fill the space after re-excavation in the outer periphery with a pad that acts on the soil discharge plate.
Equipped with a pressure sensor that measures the force in the radial direction,
Remove the soil so that the pressure measured by the force sensor does not exceed the set pressure.
The excavation propulsion method is characterized in that the amount of protrusion of the plate is controlled, the frictional force of the pipe is reduced while preventing the ground from collapsing, and the pipe can be smoothly propelled over a long distance.
に装置されたものを使用し、必要時に突出させるように
した請求項１記載の掘削推進工法。2. The excavation and propulsion method according to claim 1, wherein the earth-discharging plate used is a device which can be retracted from the outer peripheral portion of the pipe, and is made to project when necessary.
部の部分においてパイプ外方へ突出拡巾するようにした
請求項１又は２記載の掘削推進工法。3. The excavation and propulsion method according to claim 1 or 2, wherein the earth-discharging plate projects and widens outside the pipe at the outer periphery of the lower portion of the pipe and the top portion of the pipe.
列を弯曲しながら屈曲した地中トンネルを削孔できるよ
うにした請求項１〜３いずれか記載の掘削推進工法。4. A pipe in which pipes are rotatably connected to each other.
You can drill a bent underground tunnel while bending the row.
Unishi was claims 1-3 excavation jacking method according to any one.
プを直列に連結し、最後尾のパイプを推進する方向に押
し込むジャッキを設け、パイプ列の外周部に先端が先細
りとなって前面が傾斜した排土板をパイプ外周から突出
できるように設け、パイプの後端部とこれと連結される
パイプの前端部とに中間を陥凹した連結筒を少なくとも
一方パイプに対し摺動自在に且つ水密を保持する状態に
嵌装し、同連結筒の陥凹部に排土板を出没自在に配置
し、同排土板を進退するロッドを連結筒に貫通させ、ロ
ッドの連結筒内側にこれを進退させる油圧シリンダーを
設けた掘削装置。5. A plurality of pies of the same diameter are provided at the rear end of the excavator at the front end.
Connected in series and push the last pipe in the direction
A jack to insert is provided, and the tip is tapered on the outer periphery of the pipe row.
As a result, the earth sloping plate protruding from the outer circumference of the pipe
Provided so that it can be connected to the rear end of the pipe
At least a connecting cylinder with a recess in the middle at the front end of the pipe
On the other hand, in a state of being slidable and watertight with respect to the pipe
It is fitted and the earth removal plate is placed in the recess of the connecting cylinder so that it can be retracted.
Then, insert the rod that advances and
A hydraulic cylinder that moves it back and forth inside the connecting cylinder
Excavator provided .
プを直列に連結し、最後尾のパイプを推進する方向に押
し込むジャッキを設け、パイプ列の外周部に先端が先細
りとなって前面が傾斜した排土板をパイプ外周から突出
できるように設け、排土板に作用するパイプ半径方向に
作用する力を計測する圧力センサーを設け、同圧力セン
サーの圧力値が設定圧力値を超えると排土板の突出量を
小さくするようにして設定圧力値を超えないように排土
板の突出量を制御する制御部を備えた掘削装置。6. A plurality of pipes having the same diameter are connected in series at the rear end of the excavator at the tip, and a jack is provided for pushing the last pipe in the propelling direction, and the tip is tapered at the outer peripheral portion of the pipe row. the soil removing board front is inclined arranged so as to be out pipe periphery or et collision, the pipe radially acting on a blade Te
A pressure sensor that measures the acting force is installed to
If the pressure value of the sir exceeds the set pressure value,
Remove the soil by making it smaller so that the set pressure value is not exceeded.
An excavator equipped with a control unit that controls the amount of protrusion of a plate .
イプの頂部部分においてパイプ外周面から出没自在に装
置された請求項５又は６記載の掘削装置。7. The excavating device according to claim 5 , wherein the earth-discharging plate is arranged so as to be retractable from the outer peripheral surface of the pipe at the outer peripheral portion of the lower portion of the pipe and the top portion of the pipe.
し、屈曲した地中トンネルを削孔できるようにした請求
項５〜７いずれか記載の掘削装置。8. The excavating device according to claim 5, wherein pipes are connected to each other by a jack so that the pipes can be turned, and a bent underground tunnel can be drilled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14659498A JP3534610B2 (en) | 1998-05-11 | 1998-05-11 | Drilling promotion method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14659498A JP3534610B2 (en) | 1998-05-11 | 1998-05-11 | Drilling promotion method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11324571A JPH11324571A (en) | 1999-11-26 |
| JP3534610B2 true JP3534610B2 (en) | 2004-06-07 |
Family
ID=15411255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14659498A Expired - Fee Related JP3534610B2 (en) | 1998-05-11 | 1998-05-11 | Drilling promotion method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3534610B2 (en) |
-
1998
- 1998-05-11 JP JP14659498A patent/JP3534610B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11324571A (en) | 1999-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE34620E (en) | Trenching apparatus and methods of forming inground retaining walls | |
| EP0890708B1 (en) | Method, system and device for building a wall in the ground | |
| CN105156123B (en) | A kind of open type shield excavation machine and its application method | |
| US9039330B1 (en) | Pipe boring shield | |
| JP3534610B2 (en) | Drilling promotion method and equipment | |
| JPS5873693A (en) | Partial widening of tunnel due to shield construction method | |
| JP4973051B2 (en) | Method of excavating small earth covering section by earth pressure type shield machine and pressure management method in chamber | |
| US4501517A (en) | Self propelled trench shield | |
| JP2933476B2 (en) | Underground pipe laying method | |
| JP3512012B2 (en) | How to excavate | |
| JP4214082B2 (en) | Propulsion method excavation equipment and propulsion method | |
| JP2020139364A (en) | Reconstruction method of existing pipeline | |
| JP3404653B2 (en) | Shield machine | |
| JP3181242B2 (en) | Equipment for middle pressing method | |
| JP7319346B2 (en) | Open shield machine and open shield construction method | |
| JP3739560B2 (en) | Long distance propulsion method | |
| JP7396709B1 (en) | Ground drilling method, drilling control device for ground drilling equipment, and its program | |
| JP2000120066A (en) | Execution method for steel pipe pile | |
| JP3546998B2 (en) | Gravel shield machine | |
| JP3161691B2 (en) | Underground buried body drilling equipment | |
| EP1186742A2 (en) | Method, system and device for building a wall in the ground | |
| CN112032405A (en) | Underground pipeline laying device with soil discharging function | |
| JP2007132004A (en) | Tunnel excavator | |
| KR101048859B1 (en) | Method for propelling using culvert box placed on roller and method using thereof | |
| CN112647958A (en) | Construction method of box culvert |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040216 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040309 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090319 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090319 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100319 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100319 Year of fee payment: 6 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313114 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100319 Year of fee payment: 6 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313114 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313114 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313114 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120319 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120319 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130319 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140319 Year of fee payment: 10 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313115 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |