JP2000008768A - Long-distance propulsion excavator - Google Patents

Long-distance propulsion excavator

Info

Publication number
JP2000008768A
JP2000008768A JP10174362A JP17436298A JP2000008768A JP 2000008768 A JP2000008768 A JP 2000008768A JP 10174362 A JP10174362 A JP 10174362A JP 17436298 A JP17436298 A JP 17436298A JP 2000008768 A JP2000008768 A JP 2000008768A
Authority
JP
Japan
Prior art keywords
excavator
propulsion
propulsion pipe
outer periphery
pipe
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.)
Pending
Application number
JP10174362A
Other languages
Japanese (ja)
Inventor
Nobuhiko Kimura
村 信 彦 木
Michio Okamura
村 道 夫 岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kidoh Construction Co Ltd
Original Assignee
Kidoh Construction Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kidoh Construction Co Ltd filed Critical Kidoh Construction Co Ltd
Priority to JP10174362A priority Critical patent/JP2000008768A/en
Publication of JP2000008768A publication Critical patent/JP2000008768A/en
Pending legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce frictional resistance working on a propulsion pipe by forming a tunnel hole formed of viscous material, on the outer periphery of the propulsion pipe by an excavator at the tip to ensure a uniform void between the tunnel hole and the outer periphery of the propulsion pipe, and filling a lubricant in the void. SOLUTION: An excavator 1 is composed of excavating mechanism 2 equipped at the tip of an outer cylinder 4 of the excavator; a wide ring 3 fixedly provided at the front outer periphery of the outer cylinder 4; a primary injection hole provided at the rear end face of the wide ring 3, with a specified circumferential space; and an outer periphery of the outer cylinder 4. Simultaneously with the excavation of this excavator 1, viscous material 7 is filled from the primary injection hole to the outer periphery of the excavator 1, and the viscous material 7 is enlarged in diameter to form a self-supported tunnel hole 11 at the outer periphery of a propulsion pipe.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、推進工法におい
て、先端の掘進機によって推進管外周に粘性物によるト
ンネル孔を形成させて、トンネル孔と推進管外周の空隙
に滑材層を形成して推進管に働く摩擦抵抗を低下して、
効率の良い長距離推進施工を可能とする掘進機に関する
ものである。
BACKGROUND OF THE INVENTION The present invention relates to a propulsion method, in which a tunneling hole is formed in the outer periphery of a propulsion pipe by a tip excavator, and a lubricating layer is formed in a gap between the tunnel hole and the outer circumference of the propulsion pipe. Reduce the frictional resistance acting on the propulsion pipe,
The present invention relates to an excavator that enables efficient long-distance propulsion construction.

【0002】[0002]

【従来の技術】近年、推進工法は道路事情や工事公害の
問題より、出来るだけ立坑を構築しない長距離・曲線推
進施工が計画される傾向にある。推進工法は、先端に装
備した掘進機の掘削機構で地山を掘削しながら後方より
元押しジャッキで推進管の端面を加圧して地中に推進管
を埋設する方法である。このため、推進延長が増大する
にしたがい、推進管と地盤の摩擦抵抗も比例して増加し
ていき、最後には推進管の許容軸方向力よりも大きくな
って、推進施工が不可能となる。このため、推進管の中
間の継ぎ手部に中押ジャッキを装備した中押装置を設け
て、推進管後端に集中する推進力を分散する方法や、推
進管に設けられた滑材注入孔から各種滑材を注入して、
推進管と滑材の摩擦抵抗に変えることによって推進管に
かかる推進力を低下させる方法が一般に多く用いられて
いる。
2. Description of the Related Art In recent years, there has been a tendency for long-distance / curve propulsion construction, in which a vertical shaft is not constructed as much as possible, to be planned due to problems of road conditions and construction pollution. The propulsion method is a method of burying a propulsion pipe in the ground by pressurizing the end face of the propulsion pipe with a main push jack from the rear while excavating the ground with an excavation mechanism of an excavator equipped at the tip. For this reason, as the propulsion extension increases, the frictional resistance between the propulsion pipe and the ground also increases in proportion, and finally becomes larger than the allowable axial force of the propulsion pipe, making propulsion construction impossible. . For this reason, a middle push device equipped with a middle push jack is provided at the joint part in the middle of the propulsion pipe to disperse the propulsive force concentrated at the rear end of the propulsion pipe, or from the lubrication injection hole provided in the propulsion pipe Inject various lubricants,
Generally, a method of reducing the propulsive force applied to the propulsion pipe by changing the frictional resistance between the propulsion pipe and the sliding material is widely used.

【0003】[0003]

【発明が解決しようとする課題】前記した中押装置を用
いる方法は、推進管の後端面に集中してかかる推進力
を、推進管の許容軸方向力以内となるように中押装置を
複数箇所に配置すればよく、長距離推進施工が可能とな
った。しかし、中押装置は前方の装置から順次一づつ後
方の装置へと操作を繰り返していかなければならなく、
中押装置の設置カ所数が複数カ所になってくると、推進
操作が複雑となり、推進速度が低下する事となる。ま
た、推進管に設けられた滑材注入孔から滑材を注入する
方法は、掘進機で形成されたトンネル孔が保持されてい
る地盤では、推進管から注入された滑材が推進管外周に
均等に充填されるため、効率の良い推進力の低減が行え
る。しかし、自立性のない土質での採用が多い推進施工
では、掘進機で形成したトンネル孔が瞬時に崩壊した
り、圧密されて地山と推進管の間の空隙を無くしてしま
い、推進管の注入孔より滑材を注入しても滑材の充填空
間がないため、部分的に注入されたり地盤の弱い部分へ
逸散したりして、推進管外周に均等に滑材が充填でき
ず、推進力は推進延長とともに比例して徐々に増加し、
推進施工が困難となったり、推進管の破損等を招来する
こととなる。
According to the above-mentioned method using the intermediate pushing device, a plurality of the intermediate pushing devices are provided so that the propulsive force concentrated on the rear end face of the propulsion tube is within the allowable axial force of the propulsion tube. It has only to be placed at a location, and long-distance propulsion construction has become possible. However, the middle push device must repeat the operation from the front device to the rear device one by one,
When the number of places where the middle pusher is installed becomes more than one, the propulsion operation becomes complicated, and the propulsion speed decreases. In addition, in the method of injecting the lubricating material from the lubricating material injection hole provided in the propulsion pipe, in the ground where the tunnel hole formed by the excavator is held, the lubricating material injected from the propulsion pipe is spread around the propelling pipe. Since the filling is performed evenly, the propulsive force can be efficiently reduced. However, in the case of propulsion construction, which is often used in soils without independence, the tunnel hole formed by the excavator collapses instantaneously or is compacted, eliminating the gap between the ground and the propulsion pipe. Even if the lubrication material is injected from the injection hole, there is no space for filling the lubrication material.Therefore, the lubrication material cannot be evenly filled around the propulsion pipe because it is partially injected or escapes to the weak part of the ground. Propulsion gradually increases in proportion to the propulsion extension,
This will make the propulsion construction difficult or cause damage to the propulsion pipe.

【0004】このため、本発明は推進施工において先端
の掘進機で粘性物によるトンネル孔を形成させ、そのト
ンネル孔と推進管外周の間に滑材を注入して掘進機や推
進管外周の摩擦抵抗を著しく低減させて、効率の良い長
距離推進施工を可能とする掘進機を提供する。
[0004] Therefore, in the present invention, a tunnel hole made of a viscous material is formed by a tip excavator in the propulsion work, and a sliding material is injected between the tunnel hole and the outer periphery of the propulsion pipe to cause friction between the excavator and the outer circumference of the propulsion pipe. To provide an excavator capable of efficiently performing long-distance propulsion construction with significantly reduced resistance.

【0005】[0005]

【課題を解決するための手段】すなわち本発明は、掘進
機外筒の先端に装備した掘削機構と、掘進機外筒の前方
外周に固設した拡幅リングと、前記拡幅リングの後端面
に円周方向に所定の間隔を置いて設けた第1次注入孔
と、掘進機外筒の後方に設けた拡径リングとで構成さ
れ、掘進機の掘進とともに掘進機外周に粘性物を注入し
て粘性物を拡径することで推進管の外周にトンネル孔を
形成する長距離推進用掘進機である。
That is, the present invention provides a digging mechanism mounted on the tip of an excavator barrel, a widening ring fixedly mounted on the outer periphery in front of the excavator barrel, and a circular end on the rear end face of the widening ring. A primary injection hole provided at a predetermined interval in the circumferential direction, and a diameter increasing ring provided behind the outer cylinder of the excavator, and a viscous substance is injected around the excavator along with the excavation of the excavator. This is a long-distance propulsion excavator that forms a tunnel hole on the outer circumference of a propulsion pipe by expanding the diameter of a viscous material.

【0006】掘進機の掘削機構としては、従来用いられ
ている掘進機構が用いられ、土質条件によって土砂取込
口等の開口比を変化させて使用する。掘進機外筒の前方
外周に取り付けられる拡幅リング厚は、土質条件や管径
によって推進管外周よりも幾分大きくなるように固設さ
れている。拡幅リングの形状としては、断面が矩形状の
ものが一般に用いられている。拡幅リングの後端面に設
けられている第1注入孔は、外筒から掘進機内に設置さ
れた配管材に接続されている。
As the excavating mechanism of the excavator, a conventionally used excavating mechanism is used. The excavating mechanism is used by changing an opening ratio of a sediment intake port or the like according to soil conditions. The width of the widened ring attached to the outer periphery in front of the excavator outer cylinder is fixed so as to be slightly larger than the outer periphery of the propulsion pipe depending on the soil condition and the pipe diameter. As the shape of the widening ring, one having a rectangular cross section is generally used. The first injection hole provided in the rear end surface of the widening ring is connected from the outer cylinder to a pipe member installed in the excavator.

【0007】掘進機外筒の後方に設けられる拡径リング
は、第1注入孔から注入された粘性物を外周地盤に圧密
して拡径するために掘進機外筒径より大きくなるように
装備されている。拡径リングの大きさは、推進管径や土
質によって変化させ、圧密がスムーズに行えるように前
方より徐々に拡径するテーパ形状とすると有効である。
[0007] An expanding ring provided at the rear of the excavator outer cylinder is provided so as to be larger than the excavator outer cylinder diameter in order to consolidate and expand the viscous material injected from the first injection hole to the outer peripheral ground. Have been. It is effective to change the size of the diameter-expanding ring depending on the diameter of the propulsion pipe and the soil quality, and to form a tapered shape that gradually expands from the front so that consolidation can be performed smoothly.

【0008】第1注入孔から注入される粘性物として
は、高粘度の粘土材や樹脂材等が用いられ、拡径によっ
て外周地盤内に圧密されて、地山を保持する。
As the viscous material injected from the first injection hole, a high-viscosity clay material, a resin material, or the like is used.

【0009】以上の構成により、先端の掘進機構により
地盤を掘削しながら掘進機を前進させると、掘進機外筒
の前方に固設した拡幅リングにより、地盤は拡幅リング
径まで拡幅されて掘進機外筒より大きなトンネル孔を形
成する。形成されたトンネル孔と掘進機外筒の空隙に、
第1注入孔から粘性物が注入充填され、空隙を保持す
る。そして掘進機の前進に伴って、粘性物は掘進機外筒
後方の拡径リングを通過することにより外周地盤に圧密
されて自立したトンネル孔を形成する。掘進機通過後
は、確実に保持された前記トンネル孔と推進管の空隙に
通常の滑材が均等に注入されて小さな推進力で推進施工
が行える。
With the above arrangement, when the excavator is advanced while excavating the ground by the excavating mechanism at the tip, the ground is widened to the diameter of the widening ring by the widening ring fixed in front of the outer cylinder of the excavator. Form a tunnel hole larger than the outer cylinder. In the formed tunnel hole and the gap between the excavator outer cylinder,
A viscous substance is injected and filled from the first injection hole to maintain a gap. Then, as the excavator advances, the viscous material passes through the diameter-enlarging ring at the rear of the excavator outer cylinder and is compacted on the outer peripheral ground to form a self-supporting tunnel hole. After passing through the excavator, ordinary lubricating material is evenly injected into the gap between the tunnel hole and the propulsion pipe which is securely held, so that the propulsion work can be performed with a small propulsion force.

【0010】[0010]

【発明の実施の形態】以下、本発明の実施形態を図面に
基づいて説明する。図1は、本発明の長距離推進用掘進
機を説明する側面図である。掘進機1の先端には、地盤
を掘削する掘削機構2が装備されている。一般に用いら
れる掘削機構2の構造としては、全面に切削刃を設けた
円盤状の面板を回転させて掘削し、複数カ所に設けた取
込口より掘削土を取り込む構成のものが用いられるが、
土質条件等によってはスポークタイプの掘削機構を用い
ることも可能である。掘進機1の前方の外筒4には、所
定の厚さを持った断面矩形の拡幅リング3が全周に固設
されている。拡幅リング3の後端面には、円周方向に所
定の間隔を置いて第1注入孔5が設けられ、掘進機1内
の配管材6に接続されている。掘進機1の後方の外筒4
には、前方より徐々に拡径した拡径リング8が全周に設
けられている。拡幅及び拡径の大きさは土質条件や推進
管9径に応じて決定される。掘進機1の後方には、推進
管9が嵌設されている。推進管9には、所定の位置に壁
面を貫通して第2注入孔10が設けられている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view illustrating a long-distance propulsion machine according to the present invention. At the tip of the excavator 1, an excavating mechanism 2 for excavating the ground is provided. As a structure of the generally used excavating mechanism 2, a configuration is used in which a disk-shaped face plate provided with a cutting blade is rotated on the entire surface to perform excavation, and excavated soil is taken in from intake ports provided at a plurality of locations.
It is also possible to use a spoke type excavation mechanism depending on soil conditions and the like. On the outer cylinder 4 in front of the excavator 1, a widened ring 3 having a predetermined thickness and a rectangular section is fixed all around. On the rear end surface of the widening ring 3, first injection holes 5 are provided at predetermined intervals in a circumferential direction, and are connected to a pipe member 6 in the excavator 1. Outer cylinder 4 behind excavator 1
Is provided with a diameter-enlarging ring 8 whose diameter is gradually increased from the front. The size of the widening and the widening is determined according to soil conditions and the diameter of the propulsion pipe 9. A propulsion pipe 9 is fitted behind the excavator 1. The propulsion pipe 9 is provided with a second injection hole 10 penetrating a wall at a predetermined position.

【0011】図2は、図1における矢視A−Aを示す断
面図である。掘進機1の外筒4の前方には、全周に拡幅
リング3が固設されている。前記拡幅リング3の後端面
には、円周方向に等間隔で4カ所の第1注入孔5が設け
られている。第1注入孔5は、掘進機1の外筒4をとお
り、掘進機1内の配管材6に接続されている。第1注入
孔5部分には、図示しないが外部からの地下水や注入し
た粘性物の逆流等がないように逆止弁が設置されてい
る。本実施形態では、第1注入孔5の設置カ所を4カ所
としたが、推進管9径に応じて増減させることができ
る。
FIG. 2 is a sectional view taken along the line AA in FIG. In front of the outer cylinder 4 of the excavator 1, a widening ring 3 is fixedly provided around the entire circumference. On the rear end surface of the widening ring 3, four first injection holes 5 are provided at equal intervals in the circumferential direction. The first injection hole 5 passes through the outer cylinder 4 of the excavator 1 and is connected to a pipe 6 in the excavator 1. Although not shown, a check valve is provided in the first injection hole 5 so as to prevent backflow of groundwater or injected viscous material from the outside. In the present embodiment, the first injection hole 5 is provided at four locations, but can be increased or decreased according to the diameter of the propulsion pipe 9.

【0012】図3は、推進管部の状況を説明する断面図
である。推進管9の外周の地山には、掘進機1によって
粘性物による粘性物トンネル孔11が形成されている。
粘性物トンネル孔11と推進管9には、均等な空隙が形
成され、推進管9の第2注入孔10から注入された滑材
12が推進管9外周に均等に充填されている。前記滑材
12としては、通常用いられる液状の滑材でよく、推進
管9外周に均等に充填されていることが要点となる。
FIG. 3 is a sectional view for explaining the state of the propulsion pipe. The excavator 1 forms a viscous material tunnel hole 11 made of viscous material in the ground around the propulsion pipe 9.
An even gap is formed between the viscous material tunnel hole 11 and the propulsion pipe 9, and the outer periphery of the propulsion pipe 9 is evenly filled with the lubricating material 12 injected from the second injection hole 10 of the propulsion pipe 9. The lubricating material 12 may be a commonly used liquid lubricating material, and the point is that the lubricating material is uniformly filled around the propulsion pipe 9.

【0013】次に本発明の長距離推進用掘進機を用いた
推進施工状況について説明する。掘進機1の掘削機構2
を稼働させ、先端の地盤を掘削しながら掘進機1が前進
される。掘進機1の前進とともに、拡幅リング3の後端
面より第1注入孔5から粘性物7が注入されて、拡幅リ
ング3で形成したトンネル孔と外筒4との空隙を充填し
て保持する。さらに掘進機1の前進に伴って、粘性物7
は掘進機1の後方の設けた拡径リング8によって圧密さ
れて外周地盤に密着し、自立した粘性物トンネル孔11
を形成する。掘進機1によって確実に保持された粘性物
トンネル孔11と推進管9との空隙には、推進管9に設
けた第2注入孔10より滑材12が全周均等に注入され
る。上記した掘進機1により、推進管9の外周は粘性物
トンネル孔11に保持されて均等な滑材12が充填され
ることとなり、推進管9と滑材12の小さな摩擦抵抗だ
けとなり、長距離の推進施工も小さな推進力で施工が可
能となる。
Next, a description will be given of the state of propulsion construction using the long-distance propulsion machine according to the present invention. Excavation mechanism 2 of excavator 1
And the excavator 1 is advanced while excavating the ground at the tip. As the excavator 1 advances, the viscous material 7 is injected from the rear end face of the widening ring 3 from the first injection hole 5 to fill and hold the gap between the tunnel hole formed by the widening ring 3 and the outer cylinder 4. Further, as the excavator 1 advances, the viscous material 7
Is compacted by an expanding ring 8 provided at the rear of the excavator 1 and closely adhered to the outer peripheral ground, and a self-standing viscous material tunnel hole 11 is formed.
To form In the gap between the viscous material tunnel hole 11 and the propulsion pipe 9 securely held by the excavator 1, the lubricating material 12 is uniformly injected through the second injection hole 10 provided in the propulsion pipe 9. By the above-described excavator 1, the outer periphery of the propulsion pipe 9 is held in the viscous material tunnel hole 11 and is filled with the uniform lubricating material 12, so that only a small frictional resistance between the propulsion pipe 9 and the lubricating material 12 is obtained, and the long distance Can be constructed with a small propulsion force.

【0014】[0014]

【発明の効果】以上のように、本発明の長距離推進用掘
進機により、推進管外周に自立したトンネル孔を保持
し、その空隙に確実に滑材を均等充填できるため、推進
施工の推進力のメインとなっていた推進管外周の摩擦抵
抗を著しく低減できるようになった。このため、長距離
推進施工でも、従来のように推進管に大きな推進力が作
用することがなくなり、管端面の破損や複雑な中押操作
等の必要がなくなり、工期の短縮、工事費の縮減を可能
とした。
As described above, the excavator for long-distance propulsion according to the present invention can maintain a self-standing tunnel hole on the outer periphery of the propulsion pipe and reliably fill the gap with the lubricant smoothly. The frictional resistance on the outer periphery of the propulsion pipe, which has been the main force, can be significantly reduced. As a result, even in long-distance propulsion construction, a large propulsion force does not act on the propulsion pipe as in the past, eliminating the need for damage to the pipe end face and complicated middle pressing operation, etc., shortening the construction period and reducing the construction cost Was made possible.

【0015】[0015]

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の長距離推進用掘進機を説明する側面図
である。
FIG. 1 is a side view illustrating a long-distance propulsion machine according to the present invention.

【図2】図1における矢視A−Aを示す断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG.

【図3】推進管部の状況を説明する断面図である。FIG. 3 is a cross-sectional view illustrating a state of a propulsion pipe.

【符号の説明】[Explanation of symbols]

1 掘進機 2 掘削機構 3 拡幅リング 4 外筒 5 第1注入孔 6 配管材 7 粘性物 8 拡径リング 9 推進管 10 第2注入孔 11 粘性物トンネル孔 12 滑材 REFERENCE SIGNS LIST 1 excavator 2 excavating mechanism 3 widening ring 4 outer cylinder 5 first injection hole 6 pipe 7 viscous material 8 large diameter ring 9 propulsion pipe 10 second injection hole 11 viscous material tunnel hole 12 lubricating material

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】先端に掘削機構を装備して推進管を長距離
にわたって推進埋設するための掘進機において、掘進機
外筒の先端に装備した前記掘削機構と、掘進機外筒の前
方外周に固設した拡幅リングと、前記拡幅リングの後端
面に円周方向に所定の間隔を置いて設けた第1次注入孔
と、掘進機外筒の後方に設けた拡径リングとで構成さ
れ、掘進機の掘進とともに掘進機外周に第1注入孔から
粘性物を注入充填して粘性物を拡径することにより推進
管外周にトンネル孔を形成することを特徴とする長距離
用掘進機。
An excavator for excavating a propulsion tube over a long distance by equipping a tip with an excavation mechanism. A fixed widening ring, a primary injection hole provided at a rear end surface of the widening ring at a predetermined interval in a circumferential direction, and a widening ring provided behind the outer cylinder of the excavator; A long-distance excavator characterized in that a tunnel hole is formed in an outer periphery of a propulsion pipe by injecting and filling a viscous substance from a first injection hole into an outer periphery of the excavator as the excavator excavates and expanding the viscous substance.
JP10174362A 1998-06-22 1998-06-22 Long-distance propulsion excavator Pending JP2000008768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10174362A JP2000008768A (en) 1998-06-22 1998-06-22 Long-distance propulsion excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10174362A JP2000008768A (en) 1998-06-22 1998-06-22 Long-distance propulsion excavator

Publications (1)

Publication Number Publication Date
JP2000008768A true JP2000008768A (en) 2000-01-11

Family

ID=15977302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10174362A Pending JP2000008768A (en) 1998-06-22 1998-06-22 Long-distance propulsion excavator

Country Status (1)

Country Link
JP (1) JP2000008768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009114652A (en) * 2007-11-02 2009-05-28 Sokushin Kogyo Kk Internal pushing method and internal pushing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009114652A (en) * 2007-11-02 2009-05-28 Sokushin Kogyo Kk Internal pushing method and internal pushing device

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