JP2006045773A - Underground jacking device - Google Patents

Underground jacking device Download PDF

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JP2006045773A
JP2006045773A JP2004223891A JP2004223891A JP2006045773A JP 2006045773 A JP2006045773 A JP 2006045773A JP 2004223891 A JP2004223891 A JP 2004223891A JP 2004223891 A JP2004223891 A JP 2004223891A JP 2006045773 A JP2006045773 A JP 2006045773A
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ground
main body
apparatus main
unit
units
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Takayuki Suetsugu
孝之 末次
Kazuki Sumi
和樹 角
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Fujiken KK
Fujiken Co Ltd
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Fujiken KK
Fujiken Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground jacking device capable of excavating in any direction of the ground, capable of easily boring a hole having a curved part, and capable of simplifying an aboveground side work assisting device, by adjusting the advancing direction in the ground, by partially varying a form of the device and using a jacking mechanism without requiring the direct driving force transmission via a rod from an aboveground part. <P>SOLUTION: A device body 10 for installing a tip bit 20 in a tip part, is formed into a divided structure, and an interval between units for forming the device body 10, can be adjusted in respective actuator positions. An impactor 40 and a gripper part 50 are arranged so that the device body 10 can be expanded-contracted and bent and the device body 10 can be advanced in the ground with every unit. Various works in the ground can be performed by arriving even at a place unable to arrive only by a linear boring advance by advancing boring while bending in the ground, by jacking while changing the advancing direction in the ground. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、地盤改良工事や地盤の土質調査等において、地盤を掘削して地中の所定深さへ到達する地中推進装置に関し、特に、地中のいずれの方向にも進行方向を変えつつ掘進可能とされて直進のみでは到達不能な箇所へも到達させられる地中推進装置に関する。   The present invention relates to an underground propulsion apparatus that excavates the ground to reach a predetermined depth in the ground for ground improvement work or soil soil investigation, and in particular, while changing the traveling direction in any direction in the ground. The present invention relates to an underground propulsion device that is capable of digging and that can reach a place that cannot be reached only by going straight.

土木工事において、土質調査や地盤改良作業等に先立って地盤に対し削孔を行う場合には、一般にボーリング装置が用いられる。ボーリング装置は先端のビットにロッドを介して回転力を与えて掘削する回転型のものと、ビットに下向きの衝撃力を与えて掘削する衝撃型のものに大きく分けられるが、近年、掘削効率向上のために、ビットに回転と衝撃力(又は振動)の両方を加える組合わせ型が用いられるようになっている。このような従来のボーリング装置の一例として、特開平5−311967号公報に記載されるものがある。この従来のボーリング装置は、地上でロッドを回転させる回転駆動装置と、ロッドを振動させる起振装置とを備え、これら回転駆動装置と起振装置が掘進方向前後に移動可能に支持されてなる構成である。   In civil engineering work, a boring device is generally used when drilling holes in the ground prior to soil investigation or ground improvement work. Boring devices can be broadly divided into rotary types that excavate by applying rotational force to the bit at the tip via a rod, and impact types that excavate by applying downward impact force to the bit, but in recent years the excavation efficiency has improved. Therefore, a combination type that applies both rotation and impact force (or vibration) to the bit is used. An example of such a conventional boring device is disclosed in Japanese Patent Laid-Open No. 5-31967. This conventional boring device includes a rotation driving device that rotates a rod on the ground and a vibration generating device that vibrates the rod, and the rotation driving device and the vibration generating device are supported so as to be movable back and forth in the excavation direction. It is.

上記従来のボーリング装置は、いわゆるロータリーパーカッションドリルの衝撃力付与機構を起振装置に置換えたものであり、地上からロッドを地盤へ送り込みながら、回転駆動装置の作動によりロッドを回転させ、同時に、起振装置によって起振力をロッドに伝達してロッドを振動させることで、ロッドと共に回転し且つ振動するビットによって地盤が掘削される仕組みである。
特開平5−311967号公報
The conventional boring device replaces the impact force applying mechanism of a so-called rotary percussion drill with a vibration generating device. While feeding the rod from the ground to the ground, the rod is rotated by the operation of the rotary drive device, and at the same time, This is a mechanism in which the ground is excavated by a bit that rotates and vibrates with the rod by transmitting the vibration force to the rod by the vibration device to vibrate the rod.
Japanese Patent Laid-Open No. 5-31967

従来のボーリング装置は以上のように構成されており、ロッドを用いてビットの地盤に対する押込み及び引上げを行うものであることから、地盤に対し垂直方向など直線状に削孔を行えるのみであり、孔を途中で曲げたり緩やかな曲線状に穿設したりすることはほとんどできないという課題を有していた。このため、削孔した孔を利用する土質調査など各種作業における制約が大きく、既設の建物下側の地盤調査を隣接地の地上側から行うことなどは実現が極めて難しかった。   The conventional boring device is configured as described above, and uses a rod to push and pull the bit into the ground, so it can only drill holes in a straight line such as perpendicular to the ground. There has been a problem that it is almost impossible to bend a hole in the middle or to make a hole in a gentle curve. For this reason, there are large restrictions in various works such as soil surveys using drilled holes, and it has been extremely difficult to perform ground surveys on the lower side of existing buildings from the ground side of adjacent land.

また、従来のボーリング装置は、地上からドリルロッドを回転させて地中のビットに回転力を与え、削孔を行っていたため、地上側の装置が適切な回転力を付与可能な大型で複雑な機構を有することに加え、駆動装置とロッド並びにロッド同士の連結構造も複雑なものとなっており、こうした装置自体や取扱いのコストが大きくなるという課題を有していた。   In addition, the conventional boring device rotates the drill rod from the ground to apply a rotational force to the bit in the ground to perform drilling, so that the ground-side device can provide an appropriate rotational force and is large and complicated. In addition to having the mechanism, the drive device, the rod, and the connecting structure between the rods are also complicated, and there has been a problem that the cost of the device itself and handling becomes large.

さらに、従来のロータリーパーカッションドリル等の場合、地上側装置で打撃によりビットまで伝わる衝撃力を発生させるため、衝撃と同時に騒音も発生していた。前記特許文献に記載された従来のボーリング装置においては、衝撃により発生する騒音ほどではないものの、振動に伴って騒音が発生し、こうした騒音源が地上にあるため、何らかの騒音防止措置を施したとしても、騒音発生を十分に抑えることができず、一般の住宅近傍では削孔作業を行うことは難しいなど、工事環境の制約が多いという課題を有していた。   Furthermore, in the case of a conventional rotary percussion drill or the like, noise is generated at the same time as the impact because an impact force transmitted to the bit by striking with the ground side device is generated. In the conventional boring device described in the above-mentioned patent document, although not as much as noise generated by impact, noise is generated with vibration, and since such a noise source is on the ground, some noise prevention measures are taken. However, noise generation could not be sufficiently suppressed, and it was difficult to perform drilling work in the vicinity of ordinary houses, and there was a problem that there were many restrictions on the construction environment.

本発明は前記課題を解消するためになされたもので、地上からのロッドを介した直接的な駆動力伝達を要しない推進機構を用いると共に、装置の形態を一部可変として地中での進行方向調整を可能とし、地盤のいずれの方向にも掘削でき容易に曲線状部分のある孔を穿設できると共に、地上側の作業補助装置を簡略なものとすることができる地中推進装置を提供することを目的とする。   The present invention has been made to solve the above-mentioned problems, and uses a propulsion mechanism that does not require direct drive force transmission from the ground via a rod, and the device configuration is partially variable, so that the device proceeds in the ground. Providing a ground propulsion device that can adjust the direction, excavate in any direction of the ground, easily drill holes with curved portions, and simplify the work auxiliary device on the ground side The purpose is to do.

本発明に係る地中推進装置は、中空略円筒状の装置本体と、当該装置本体の先端部に配設される地盤掘削用の先端ビットとを少なくとも備え、前記先端ビットを進行方向前側として地中に導入され、地中を先端ビットの掘削動作で削孔しつつ進行する地中推進装置において、前記装置本体が、円筒軸方向に並んだ複数の略円筒状ユニットの組合わせ構造とされてなり、両端部間の長さを所定寸法範囲で変更調整自在とされて前記装置本体をなす各ユニット間で両端部を対向する二つのユニット端部にそれぞれ連結されて複数配設され、ユニット間の間隔をそれぞれの配設位置で変化させる直線往復運動型のアクチュエータと、前記装置本体の所定の一又は複数のユニット内に配設され、打撃に伴う衝撃力をユニット円筒軸方向に発生させるインパクタと、前記装置本体の所定の一又は複数のユニット外側に拡縮可能に配設され、削孔した孔壁を押圧してユニットの地中位置を保持可能とするグリッパ部と、前記装置本体の各ユニット間に配設されてユニット間を水密状態で伸縮及び屈曲可能に覆う可撓体製のカバーとを備えるものである。   An underground propulsion apparatus according to the present invention includes at least a hollow, substantially cylindrical device body and a ground excavation tip bit disposed at a tip portion of the device body, and the tip bit is a front side in the traveling direction. In the underground propulsion apparatus that is introduced inside and proceeds while drilling through the excavation operation of the tip bit, the apparatus main body has a combination structure of a plurality of substantially cylindrical units arranged in the cylindrical axis direction. The length between both ends can be changed and adjusted within a predetermined size range, and each unit constituting the apparatus main body is connected to two unit ends facing each other, and a plurality of units are arranged. The linear reciprocating motion type actuator that changes the distance between each of the arrangement positions and the one or a plurality of predetermined units of the apparatus main body, and an impact force generated by impact in the unit cylindrical axis direction. A gripper that is arranged to be able to expand and contract outside a predetermined unit or a plurality of units of the apparatus main body, presses a hole wall that has been drilled, and can hold the underground position of the unit; A cover made of a flexible body is provided between the units and covers the space between the units in a watertight manner so that they can expand and contract and bend.

このように本発明においては、先端部に先端ビットを配設された装置本体を分割構造とし、装置本体をなすユニット間の間隔を各アクチュエータ位置で調整可能として、装置本体を伸縮及び屈曲可能とすると共に、装置本体をユニットごとに地中で進行可能とするインパクタ及びグリッパ部を配設して、地中で進行方向を変更しつつ推進可能とすることにより、地中を曲りながら掘進して直線状の掘進のみでは到達できない箇所にも到達させて地中での各種作業が行えることとなる。また、地中での削孔作業を地上からロッド等による駆動力伝達を受けずに進められ、地上側装置にロッド等を強力に回転させ且つ押込む駆動力伝達機構が不要となり、騒音の発生も低減できることに加え、地上側装置の構造を簡略化、小型化して地上側に十分なスペースが確保できない箇所からでも地中への削孔を行って地盤調査や地盤改良等の作業を実施でき、施工場所の制約が少なくなる。さらに、ロッド連結等の作業が不要となって地上側装置の取扱いが容易化し、削孔作業の能率が著しく向上することとなり、地上側装置自体の低コスト化も合わせて工事全体で大幅なコストダウンが図れる。   As described above, in the present invention, the device main body having the tip bit disposed at the tip portion has a divided structure, the interval between the units constituting the device main body can be adjusted at each actuator position, and the device main body can be expanded and contracted and bent. At the same time, the impactor and gripper part that allows the device main body to travel in the ground are arranged for each unit, and the propulsion can be carried out while changing the traveling direction in the ground. Various work in the ground can be performed by reaching a point that cannot be reached only by straight excavation. In addition, drilling work in the ground can proceed without receiving drive force from the rod, etc. from the ground, eliminating the need for a drive force transmission mechanism that strongly rotates and pushes the rod, etc., on the ground side device, generating noise. In addition to simplifying and downsizing the structure of the ground side device, drilling into the ground can be carried out from places where sufficient space cannot be secured on the ground side, and work such as ground investigation and ground improvement can be carried out , There are less restrictions on the construction site In addition, work such as connecting rods becomes unnecessary, handling of the ground side equipment becomes easier, the efficiency of drilling work is significantly improved, and the cost of the ground side equipment itself is reduced. You can go down.

また、本発明に係る地中推進装置は必要に応じて、地上側供給装置と前記装置本体後部を連結する可撓管並びに装置本体内部流路を介して供給される所定の削孔用流体を装置本体先端部及び/又は先端ビットから所定圧力で噴射する一又は複数の噴射孔を備え、前記先端ビットの掘削動作に加えて、地中を前記噴射孔から噴射した削孔用流体で削孔しつつ進行するものである。   Further, the underground propulsion device according to the present invention can supply a predetermined drilling fluid supplied via a flexible pipe connecting the ground side supply device and the rear portion of the device main body and a flow passage inside the device main body as necessary. One or a plurality of injection holes for injecting at a predetermined pressure from the front end portion of the apparatus main body and / or the front end bit, and in addition to the excavation operation of the front end bit, drilling with the drilling fluid injected into the ground from the injection hole However, it progresses.

このように本発明においては、先端ビットを動作させると共に、装置本体先端側から削孔用流体を噴射して削孔を行うことにより、ビットのみの場合に比べてより確実に削孔が行え、作業能率をより一層向上させられる。   In this way, in the present invention, the tip bit is operated, and by drilling the hole drilling fluid from the tip end of the apparatus body, the hole can be drilled more reliably than in the case of only the bit, Work efficiency can be further improved.

また、本発明に係る地中推進装置は必要に応じて、前記装置本体と略同径の可撓性を有する管体で形成され、装置本体後部に連結されて装置本体に追従しつつ削孔された孔内を進行するケーシングを備えるものである。   Further, the underground propulsion device according to the present invention is formed of a flexible tube having substantially the same diameter as the device main body as necessary, and is drilled while being connected to the rear portion of the device main body and following the device main body. A casing that travels in the formed hole.

このように本発明においては、装置本体後部から地上にかけて可撓体のケーシングを配設し、装置本体と地上の補助機器間を結ぶホースやケーブル類をケーシングで覆う一方、削孔で生じた孔壁にケーシングを当接させながら掘進を進めることにより、管やケーブル類の保護を図りつつ、削孔後の孔壁の崩壊を防いで孔形状を維持でき、削孔終了後の装置引上げもスムーズに行える。   As described above, in the present invention, a flexible casing is provided from the rear of the apparatus main body to the ground, and hoses and cables connecting the apparatus main body and auxiliary equipment on the ground are covered with the casing, while holes formed by drilling are provided. By proceeding with excavation while the casing is in contact with the wall, it is possible to maintain the shape of the hole by preventing collapse of the hole wall after drilling while protecting the pipes and cables, etc. Can be done.

また、本発明に係る地中推進装置は必要に応じて、地上側供給装置と前記装置本体後部を連結する可撓管並びに装置本体内部流路を介して供給される地盤改良用の固化剤を装置本体の先端部から少なくとも進行方向に対する横方向へ噴射可能な一又は複数の噴射孔を備え、少なくとも装置全体を地上側へ後退させる際に、地中に前記噴射孔から固化剤を噴射して掘削土砂と固化剤を攪拌し、削孔箇所周囲所定範囲の地盤改良を行うものである。   Moreover, the underground propulsion apparatus according to the present invention includes a ground improvement agent supplied via a flexible pipe connecting the ground-side supply device and the rear part of the apparatus main body and a flow path inside the apparatus main body, if necessary. One or a plurality of injection holes that can be injected at least from the front end of the apparatus body in the lateral direction with respect to the traveling direction are provided, and at least when the entire apparatus is moved backward to the ground side, a solidifying agent is injected into the ground from the injection holes. The excavated sediment and the solidifying agent are agitated to improve the ground within a predetermined range around the drilling location.

このように本発明においては、削孔中又は削孔後に地盤改良用の固化剤を地上から供給して噴射し、固化剤をビット及び/又は噴射流体で地中の土砂が削り取られて生じた空隙部分に注入することにより、固化剤が掘削範囲全体にスムーズに広がることとなり、掘削土砂と固化剤との混合を促して土砂と固化剤を十分に混合して適切に地盤改良が行え、削孔された孔と共に曲線状の柱状改良部を形成できると共に、土砂と固化剤の混合を効率的に進行させて地盤改良工事にかかる時間を短縮できる。   As described above, in the present invention, the solidifying agent for ground improvement is supplied from the ground during or after drilling, and sprayed, and the earth and sand in the ground is scraped off with the bit and / or jet fluid. By injecting into the gap, the solidifying agent spreads smoothly over the entire excavation area, and mixing of the excavated earth and solidifying agent is promoted to sufficiently mix the earth and sand and the ground can be improved properly. A curved columnar improvement portion can be formed together with the drilled holes, and the time required for ground improvement work can be shortened by efficiently advancing mixing of earth and sand and a solidifying agent.

以下、本発明の一実施の形態に係る地中推進装置を図1ないし図4に基づいて説明する。本実施の形態では地盤に対し途中で湾曲した一連の孔を削孔すると共に削孔部分の周囲地盤に対し地盤改良を実施する装置の例について説明する。図1は本実施の形態に係る地中推進装置の側面図、図2は本実施の形態に係る地中推進装置の屈曲状態説明図、図3は本実施の形態に係る地中推進装置におけるグリッパ部併用時の中間ユニット下方推進状態説明図、図4は本実施の形態に係る地中推進装置におけるグリッパ部併用時の後端ユニット下方推進状態説明図である。   Hereinafter, an underground propulsion apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the present embodiment, an example of an apparatus that drills a series of holes curved in the middle of the ground and implements ground improvement on the ground around the drilled portion will be described. FIG. 1 is a side view of an underground propulsion apparatus according to the present embodiment, FIG. 2 is an explanatory view of a bent state of the underground propulsion apparatus according to the present embodiment, and FIG. 3 is an illustration of the underground propulsion apparatus according to the present embodiment. FIG. 4 is a rear end unit downward propulsion state explanatory view when the gripper portion is used together in the underground propulsion apparatus according to the present embodiment.

前記各図に示すように本実施の形態に係る地中推進装置1は、複数の略円筒状ユニットの組合わせ構造とされる中空略円筒状の装置本体10と、この装置本体10先端に回転可能に配設される地盤掘削用の先端ビット20と、前記装置本体10をなす各ユニット間に配設されてユニット間の間隔を変化させる前記アクチュエータとしての油圧シリンダ30と、装置本体10内に配設され、移動並びに削孔のための衝撃力を発生させるインパクタ40と、装置本体10外側所定箇所に拡縮可能に配設される可撓性材料製のグリッパ部50と、装置本体10の各ユニット間を水密状態を維持しつつ伸縮及び屈曲可能に覆う可撓体製のカバー60と、装置本体10後部に連結される可撓管状のケーシング70とを備える構成である。   As shown in the respective drawings, the underground propulsion device 1 according to the present embodiment is a hollow substantially cylindrical device body 10 having a combined structure of a plurality of substantially cylindrical units, and rotates at the tip of the device body 10. The tip bit 20 for excavating the ground, the hydraulic cylinder 30 as the actuator disposed between the units constituting the apparatus main body 10 to change the interval between the units, and the apparatus main body 10 Each of the impactor 40 that is disposed and generates an impact force for movement and drilling, the gripper portion 50 made of a flexible material that can be expanded and contracted at a predetermined position outside the apparatus main body 10, and each of the apparatus main body 10. The structure includes a flexible cover 60 that covers the units so that the units can be stretched and bent while maintaining a watertight state, and a flexible tubular casing 70 that is connected to the rear portion of the apparatus main body 10.

前記装置本体10は、金属製略円筒体の先端ユニット11、中間ユニット12、及び後端ユニット13の三つを円筒軸方向に並べて組合わせた構造とされ、各ユニット間に可撓体製のカバー60を配設されて水密に連結され、最後部となる後端ユニット13端部には引上げ用のワイヤ14を接続され、このワイヤ14を介して地上に固定される引上げ装置(図示を省略)により地中から引上げ可能とされる構成である。また、カバー60の内側となる先端ユニット11と中間ユニット12、及び後端ユニット13の各連結部分には、両端を先端ユニット11と中間ユニット12、もしくは中間ユニット12と後端ユニット13にそれぞれ所定角度範囲揺動可能に取付けられた複数の油圧シリンダ30が配設され、これら先端ユニット11と中間ユニット12、及び後端ユニット13は、各油圧シリンダ30の伸縮によりそのユニット間距離を可変とされると共に、同じ連結部分にある複数の油圧シリンダの伸出量を各々異ならせることで、一方のユニットを他方のユニットに対して所定角度範囲で傾けられる仕組みであり、装置本体10は全体として伸縮可能且つ屈曲可能となっている。   The apparatus main body 10 has a structure in which three of a front end unit 11, an intermediate unit 12, and a rear end unit 13 of a substantially metal cylinder are combined and arranged in the cylindrical axis direction. A cover 60 is disposed and is watertightly connected, and a pulling wire 14 is connected to the end of the rear end unit 13 which is the rearmost part, and a pulling device (not shown) is fixed to the ground via the wire 14. ) Can be pulled up from the ground. Further, the connecting portions of the front end unit 11 and the intermediate unit 12 and the rear end unit 13 that are inside the cover 60 have predetermined ends on the front end unit 11 and the intermediate unit 12, or the intermediate unit 12 and the rear end unit 13, respectively. A plurality of hydraulic cylinders 30 mounted so as to be capable of swinging in an angular range are disposed, and the distance between the units of the front end unit 11, the intermediate unit 12, and the rear end unit 13 can be changed by expansion and contraction of each hydraulic cylinder 30. At the same time, by making the extension amounts of the plurality of hydraulic cylinders in the same connecting portion different from each other, one unit can be tilted with respect to the other unit within a predetermined angle range, and the apparatus main body 10 can expand and contract as a whole. It is possible and bendable.

前記先端ユニット11の先端部分は、内蔵された油圧による回転駆動部により先端ビット20と一体に回動可能となっており、その側面には、地盤改良用の固化剤や水、空気をそれぞれ横方向へ噴射可能な複数の噴射孔15や、掘削土砂排出用の排泥口16が配設される。先端ユニット11にはこの他、カメラや各種センサ類、試料採取用の孔、さらに地中作業用の小型マニュピレータ等を設けるようにすることもできる。   The distal end portion of the distal end unit 11 can be rotated integrally with the distal end bit 20 by a built-in hydraulic rotation drive unit, and a solidifying agent for improving the ground, water, and air are respectively placed on the side surfaces thereof. A plurality of injection holes 15 capable of spraying in the direction and a mud discharge port 16 for discharging excavated sediment are provided. In addition to this, the tip unit 11 may be provided with a camera, various sensors, a hole for sampling, a small manipulator for underground work, and the like.

一方、前記中間ユニット12、及び後端ユニット13は、その内部に移動並びに削孔のための衝撃力を発生させるインパクタ40を内蔵すると共に、その外側には拡縮可能なグリッパ部50が配設される。また、中間ユニット12及び後端ユニット13の各外面にはそれぞれ複数のスタビライザ18が外方に突出状態で配設される。このスタビライザ18は、削孔の間、先端ビット20の進行方向を適切に案内して安定化させる公知の部品であり、詳細な説明を省略する。   On the other hand, the intermediate unit 12 and the rear end unit 13 incorporate an impactor 40 for generating an impact force for movement and drilling inside, and an expandable / contractible gripper portion 50 is disposed on the outside thereof. The A plurality of stabilizers 18 are disposed on the outer surfaces of the intermediate unit 12 and the rear end unit 13 so as to protrude outward. The stabilizer 18 is a known component that appropriately guides and stabilizes the traveling direction of the tip bit 20 during drilling, and a detailed description thereof is omitted.

さらに、装置本体10の内部には油圧回路の他、水、空気の他、削孔用流体や固化剤用の内部流路が配設され、装置本体10最後部に連結する複数の可撓管80を通じてそれぞれの地上側供給装置から各流体が供給される仕組みである。これに加えて、装置本体10内部には、装置の位置を取得し、これに基づいて移動方向を制御する制御部19も内蔵される。   Furthermore, in addition to the hydraulic circuit, water and air, as well as a drilling fluid and a solidifying agent internal flow path are disposed inside the apparatus main body 10, and a plurality of flexible tubes connected to the rearmost part of the apparatus main body 10. Each fluid is supplied from each ground-side supply device through 80. In addition, a control unit 19 that acquires the position of the apparatus and controls the movement direction based on the position is also incorporated in the apparatus main body 10.

前記先端ビット20は、端面に地盤を削る硬質の歯部分と、可撓管80及び装置本体10内部流路を介して供給される所定圧力の削孔用流体を噴射する複数の噴射孔(図示を省略)とを備える公知の構造であり、詳細な説明を省略する。この先端ビット20は、装置本体10の先端ユニット11に内蔵される回転駆動部17により回転可能とされる構成である。この先端ビット20の噴射孔から噴射される削孔用流体としては、高圧の水の他、水と研磨剤を混合したものでもよい。なお、先端ビット20は取替え可能であり、掘削対象の土質に応じて適切な形状のものに交換される。   The tip bit 20 has a plurality of injection holes (illustrated) for injecting a hard tooth portion that cuts the ground on the end surface, and a drilling fluid having a predetermined pressure supplied through the flexible tube 80 and the internal flow path of the apparatus main body 10. Is omitted), and detailed description thereof is omitted. The tip bit 20 is configured to be rotatable by a rotation drive unit 17 built in the tip unit 11 of the apparatus body 10. The drilling fluid ejected from the ejection hole of the tip bit 20 may be a mixture of water and an abrasive in addition to high-pressure water. The tip bit 20 can be replaced, and is replaced with one having an appropriate shape according to the soil to be excavated.

前記油圧シリンダ30は、地上側から所定の可撓管80を通じて供給される油圧により両端部間の長さを所定寸法範囲で変更調整自在とされる公知の機器であり、詳細な説明を省略する。この油圧シリンダ30は、装置本体10をなす各ユニット11、12、13間で両端部を対向する二つのユニット端部にそれぞれ連結されて複数配設され、ユニット間の間隔をそれぞれの配設位置で変化させる仕組みである。   The hydraulic cylinder 30 is a well-known device whose length between both ends can be changed and adjusted within a predetermined size range by hydraulic pressure supplied from the ground side through a predetermined flexible tube 80, and detailed description thereof is omitted. . A plurality of hydraulic cylinders 30 are connected to the two unit ends facing each other between the units 11, 12, and 13 constituting the apparatus body 10, and the intervals between the units are arranged at the respective positions. It is a mechanism to change with.

前記インパクタ40は、装置本体10の中間ユニット12及び後端ユニット13内に配設され、油圧又は空気圧により往復動して打撃を行い、ユニット円筒軸方向に衝撃力(振動)を発生させて各ユニットの孔内推進及び先端ビット20による掘削を促進する公知のハンマ機構であり、詳細な説明を省略する。   The impactor 40 is disposed in the intermediate unit 12 and the rear end unit 13 of the apparatus main body 10 and reciprocates by hydraulic pressure or air pressure to perform impact, and generates impact force (vibration) in the unit cylindrical axis direction. This is a well-known hammer mechanism that promotes in-hole propulsion of the unit and excavation by the tip bit 20, and detailed description thereof is omitted.

前記グリッパ部50は、装置本体10の中間ユニット12及び後端ユニット13外周に配設され、拡縮可能な可撓性のライナーを必要に応じて空気注入等で拡張させて孔壁に密着させ、ユニットと地盤との一体化を図り、ユニットの地中位置を保持して装置本体10の推進反力を受け止めるものである。   The gripper section 50 is disposed on the outer periphery of the intermediate unit 12 and the rear end unit 13 of the apparatus main body 10, and expands or contracts a flexible liner that can be expanded and contracted by air injection or the like as necessary to closely contact the hole wall. The unit and the ground are integrated, and the underground position of the unit is held to receive the propulsion reaction force of the apparatus main body 10.

前記カバー60は、装置本体10の各ユニット11、12、13間に配設されてユニット間の空隙部分を水密状態を維持しつつ伸縮及び屈曲可能に覆う可撓体であり、土砂や水等の進入を防いで内部の油圧シリンダ等の部品を保護するものとなっている。   The cover 60 is a flexible body that is disposed between the units 11, 12, and 13 of the apparatus body 10 and covers the gaps between the units so as to be stretchable and bendable while maintaining a watertight state. The parts such as the hydraulic cylinder are protected by preventing the intrusion.

前記ケーシング70は、装置本体10と略同径の可撓性を有する管体で形成され、装置本体10後部に連結されてワイヤ14や可撓管80を覆う状態で配設される構成であり、これらワイヤ14や可撓管80を土砂との接触や圧力から保護しつつ、装置本体10の動きに追従して削孔された孔内を上下する仕組みである。   The casing 70 is formed of a flexible tube having substantially the same diameter as the apparatus main body 10, and is connected to the rear portion of the apparatus main body 10 so as to cover the wire 14 and the flexible tube 80. The wire 14 and the flexible tube 80 are moved up and down in the drilled hole following the movement of the apparatus body 10 while protecting the wire 14 and the flexible tube 80 from contact with the earth and pressure.

なお、本実施の形態に係る地中推進装置と併用される主な工事用機器として、ワイヤを巻取って装置全体を引上げる引上げ装置の他、水とセメント等の固結材を混ぜた流動性の地盤注入用固化剤を形成するミキサ(図示を省略)や、固化剤を地中推進装置1に圧送するポンプ(図示を省略)等も合わせて用いられる。   In addition, as the main construction equipment used in conjunction with the underground propulsion device according to the present embodiment, in addition to a pulling device that winds up the wire and pulls up the entire device, a flow in which water and a cemented material such as cement are mixed A mixer (not shown) that forms a solid ground-injecting solidifying agent, a pump (not shown) that pumps the solidifying agent to the underground propulsion device 1, and the like are also used.

次に、前記構成に基づく地中推進装置による地中推進及び地盤改良動作について説明する。あらかじめ、地盤改良を行う予定箇所の地盤90に対し、地上側で地中推進装置1を引上げるための引上げ装置(図示を省略)を所定の位置に据付けた後、地中推進装置1自体を削孔開始位置に前記先端ビット20を当初の進行方向へ向けて起立状態で保持し、先端ビット20を回転させると共にインパクタ40を動作させ、地盤90の掘削及び下方への進行を開始させる。地中推進装置1の推進に伴って、ケーシング70及びその内部のワイヤ14や可撓管80も地上側から供給されて地中に進入、進行していく。   Next, the underground propulsion and the ground improvement operation by the underground propulsion device based on the above configuration will be described. In advance, after installing a lifting device (not shown) for lifting the underground propulsion device 1 on the ground side at a predetermined position with respect to the ground 90 where the ground improvement is planned, the underground propulsion device 1 itself is installed. The tip bit 20 is held upright at the drilling start position in the initial traveling direction, the tip bit 20 is rotated, and the impactor 40 is operated to start excavation of the ground 90 and progress downward. As the underground propulsion device 1 is propelled, the casing 70 and the wires 14 and the flexible tubes 80 inside the casing 70 are also supplied from the ground side and enter and advance into the ground.

ビット20の回転に伴いビット20端面に配置された噴射孔位置も回転しており、この噴射孔からは、地上のポンプ(図示を省略)から供給された高圧の水が地中に噴射され、噴射圧力により周囲の地盤90を塊状態のものも含め破砕していく。また、ビット20の駆動と同時に、装置本体10各ユニット内のインパクタ40を作動させており、各インパクタ40が打撃に伴う衝撃力及び振動を発生させる。これにより、ビット20に衝撃力が伝わって削孔能力が高まると共に、装置本体10外周面と地盤90との摩擦抵抗を軽減してよりスムーズに地盤を進行させられる。   Along with the rotation of the bit 20, the position of the injection hole arranged on the end face of the bit 20 is also rotating. From this injection hole, high-pressure water supplied from a ground pump (not shown) is injected into the ground, The surrounding ground 90 is crushed by the injection pressure, including those in a lump. Simultaneously with the driving of the bit 20, the impactor 40 in each unit of the apparatus main body 10 is operated, and each impactor 40 generates an impact force and vibration accompanying the impact. Thereby, the impact force is transmitted to the bit 20 and the drilling ability is increased, and the ground resistance can be advanced more smoothly by reducing the frictional resistance between the outer peripheral surface of the apparatus main body 10 and the ground 90.

この掘進時には、ビット20の回転に伴って後部の装置本体10を逆向きに回転させようとする反力も生ずるが、スタビライザ18が掘削範囲外側の地盤90の抵抗を受けることで装置本体10は回転しない状態を保ち、ビット20による掘削能力を確保して地中の土砂を確実に破砕して削孔できる。   At the time of excavation, a reaction force for rotating the rear apparatus main body 10 in the reverse direction is generated with the rotation of the bit 20, but the apparatus main body 10 is rotated by receiving the resistance of the ground 90 outside the excavation range. In this state, the excavation ability of the bit 20 can be secured, and the underground soil can be crushed and drilled.

先端ビット20等によって削り取られた土砂は、削孔用流体と同時に噴射される空気の圧力によって先端ユニット11に設けられる排泥口16からその内部に入り、装置本体10内の土砂排出用流路を通ってケーシング50内の排出管(図示を省略)に達し、空気と共に排出管によって上方へ搬送され、地上に回収、排土される。   The earth and sand scraped off by the tip bit 20 and the like enters the inside from the mud outlet 16 provided in the tip unit 11 by the pressure of the air sprayed simultaneously with the hole drilling fluid, and the earth and sand discharge passage in the apparatus main body 10. It passes through the exhaust pipe (not shown) in the casing 50, is conveyed upward by the exhaust pipe together with air, and is collected and discharged on the ground.

こうした中、地中推進装置1はあらかじめ設定された計画線Pに沿って進行するよう制御部19により制御された状態となっており、直進状態から進行方向を変える場合には、装置本体10をなす先端ユニット11と中間ユニット12、及び後端ユニット13の連結部分にある各油圧シリンダ30を適切に動作させてその伸縮により各ユニット11、12、13を互いに傾け、計画線Pに合わせて進行方向の調整を行うこととなる。   Under such circumstances, the underground propulsion device 1 is in a state controlled by the control unit 19 so as to travel along the preset plan line P. When changing the traveling direction from the straight traveling state, the device main body 10 is The hydraulic cylinders 30 at the connecting portions of the leading end unit 11, the intermediate unit 12, and the trailing end unit 13 are appropriately operated, and the units 11, 12, 13 are inclined with respect to each other by the expansion and contraction, and proceed according to the planned line P. The direction will be adjusted.

すなわち、装置本体10が計画線Pの湾曲部分にさしかかると、最前方の先端ユニット11とその直後の中間ユニット12間の複数の油圧シリンダ30のうち、計画線湾曲部分の外周側にあたる油圧シリンダ30が内周側にあたる油圧シリンダ30に比べてより長く伸びた状態となるように調整され、先端ユニット11が後続の中間ユニット12に対して傾き、装置本体10が屈曲した状態となる。この状態で地中推進装置1を推進させると、先端ユニット11はちょうど計画線Pに沿って曲って推進することとなる。装置本体10の後部が計画線Pの湾曲部分に達した場合も、中間ユニット12と後端ユニット13間に配置された複数の油圧シリンダ30の伸出量を前記同様に調整し、装置本体10の各ユニットが順次計画線Pに沿う状態に進行方向を変えることで、装置全体が計画線Pに沿って推進できる。   That is, when the apparatus main body 10 reaches the curved portion of the planned line P, the hydraulic cylinder 30 corresponding to the outer peripheral side of the planned line curved portion among the plurality of hydraulic cylinders 30 between the foremost tip unit 11 and the intermediate unit 12 immediately thereafter. Is adjusted to be longer than the hydraulic cylinder 30 on the inner peripheral side, the tip unit 11 is inclined with respect to the subsequent intermediate unit 12, and the apparatus main body 10 is bent. When the underground propulsion device 1 is propelled in this state, the tip unit 11 is propelled by bending along the planned line P. Even when the rear portion of the apparatus main body 10 reaches the curved portion of the planned line P, the extension amounts of the plurality of hydraulic cylinders 30 arranged between the intermediate unit 12 and the rear end unit 13 are adjusted in the same manner as described above, and the apparatus main body 10 The whole apparatus can be propelled along the plan line P by changing the traveling direction to a state along the plan line P.

地盤90の状況によっては、装置の自重に基づく下方への推進力のみでは、ビット20や削孔用流体噴射による削孔作業を行っても装置全体が下がりきれないことがある。このような場合、中間ユニット12と後端ユニット13間の油圧シリンダ30を縮めている状態で、後端ユニット13のグリッパ部50を拡張させて孔壁に密着させ、後端ユニット13が地盤に対し一体となって動かない状態としてから(図3(A)参照)、油圧シリンダ30を伸ばすことで先端ユニット11及び中間ユニット12の推進力を得ることができる(図3(B)参照)。ビット20や削孔用流体の噴射によって削孔が進み、油圧シリンダ30の最大伸び量まで先端ユニット11及び中間ユニット12が進行したら、中間ユニット12のグリッパ部50を拡張させて孔壁に密着させ、中間ユニット12を地盤に対し動かない状態にすると同時に、後端ユニット13のグリッパ部50を収縮させて後端ユニット13以降の部分を動かせる状態(図4(A)参照)とした後、中間ユニット12と後端ユニット13間の油圧シリンダ30を縮め、後端ユニット13以降を中間ユニット12側に引寄せる(図4(B)参照)。この後、中間ユニット12のグリッパ部50を収縮させて中間ユニット12より前側の部分を下方へ進められる状態とすると共に、後端ユニット13のグリッパ部50を拡張させて孔壁に密着させ、後端ユニット13を動かない状態(図3(A)参照)として、前記同様の過程を繰返せば、装置全体を下方へ推進させられることとなる。   Depending on the situation of the ground 90, the entire apparatus may not be lowered even if drilling work is performed by the bit 20 or drilling fluid jet only by the downward driving force based on the weight of the apparatus. In such a case, in a state where the hydraulic cylinder 30 between the intermediate unit 12 and the rear end unit 13 is contracted, the gripper portion 50 of the rear end unit 13 is expanded and brought into close contact with the hole wall so that the rear end unit 13 is placed on the ground. On the other hand, it is possible to obtain the propulsive force of the tip unit 11 and the intermediate unit 12 by extending the hydraulic cylinder 30 (see FIG. 3B) after the state where it does not move integrally (see FIG. 3A). When the drilling proceeds by the injection of the bit 20 or the drilling fluid and the tip unit 11 and the intermediate unit 12 advance to the maximum extension amount of the hydraulic cylinder 30, the gripper portion 50 of the intermediate unit 12 is expanded and brought into close contact with the hole wall. After the intermediate unit 12 is brought into a state where it does not move with respect to the ground, the gripper portion 50 of the rear end unit 13 is contracted so that the portion after the rear end unit 13 can be moved (see FIG. 4A). The hydraulic cylinder 30 between the unit 12 and the rear end unit 13 is contracted, and the rear end unit 13 and the subsequent parts are drawn toward the intermediate unit 12 (see FIG. 4B). Thereafter, the gripper portion 50 of the intermediate unit 12 is contracted so that the portion on the front side of the intermediate unit 12 can be moved downward, and the gripper portion 50 of the rear end unit 13 is expanded to be in close contact with the hole wall. If the same process is repeated in a state where the end unit 13 is not moved (see FIG. 3A), the entire apparatus can be pushed downward.

地中推進装置1先端のビット20があらかじめ設定した深さに達したら、地盤90の掘削を終了し、引上げ工程として、引上げ装置でワイヤ14をその周囲の可撓管80及びケーシング70ごと引上げつつ、装置本体10の先端ユニット11における噴射孔15から地盤改良用の固化剤の噴射を開始する。引上げにより地中推進装置1が上昇する一方、固化剤はビット20により削り取られた地中の土砂間に入り込み、噴射圧力によって所定範囲内の土砂と固化剤が撹拌され、一様に混合される。ビット20が地上近くの所定位置まで上昇したら、固化剤の噴射を停止させた後、地中推進装置1を全て地中から離脱させて引上げを完了させる。地盤90の改良作業範囲を一定時間放置して混合した土砂と固化剤を固化させると、地中に柱状改良部が完成する。   When the bit 20 at the tip of the underground propulsion device 1 reaches a preset depth, the excavation of the ground 90 is finished, and as a lifting process, the wire 14 is pulled up together with the surrounding flexible tube 80 and the casing 70 by the lifting device. Then, the injection of the solidifying agent for ground improvement is started from the injection hole 15 in the tip unit 11 of the apparatus main body 10. While the underground propulsion apparatus 1 is lifted by the pulling up, the solidifying agent enters between the ground soil and sand scraped by the bit 20, and the sediment and the solidifying agent within a predetermined range are stirred by the injection pressure and mixed uniformly. . When the bit 20 rises to a predetermined position near the ground, the solidifying agent injection is stopped, and then all the underground propulsion devices 1 are detached from the ground to complete the pulling up. If the earth and sand mixed with the improvement work range of the ground 90 for a certain period of time are solidified, the columnar improvement portion is completed in the ground.

このように本実施の形態に係る地中推進装置では、先端部に先端ビット20を備える装置本体10を複数分割構造とし、この装置本体10をなすユニット11、12、13間の間隔を各油圧シリンダ30で調整可能として、装置本体10を伸縮及び屈曲可能とすると共に、装置本体10をユニットごとに地中で進行可能とするインパクタ40及びグリッパ部50を配設して、地中で進行方向を変更しつつ推進可能とすることにより、地中を曲りながら掘進して直線状の掘進のみでは到達できない箇所にも到達させて地中での各種作業が行えることとなる。また、地中での削孔作業を地上からロッド等による駆動力伝達を受けずに進められ、地上側装置にロッド等を強力に回転させ且つ押込む駆動力伝達機構が不要となり、騒音の発生も低減できることに加え、地上側装置の構造を簡略化、小型化して地上側に十分なスペースが確保できない箇所からでも地中への削孔を行って土質調査や地盤改良等の作業を実施でき、施工場所の制約が少なくなる。   As described above, in the underground propulsion apparatus according to the present embodiment, the apparatus main body 10 provided with the tip bit 20 at the distal end portion is divided into a plurality of divided structures, and the intervals between the units 11, 12, and 13 constituting the apparatus main body 10 are set to the respective hydraulic pressures. Adjustable by the cylinder 30, the apparatus main body 10 can be expanded and contracted and bent, and an impactor 40 and a gripper portion 50 that allow the apparatus main body 10 to travel in the ground for each unit are disposed, and the traveling direction in the ground By making the propulsion possible while changing the distance, it is possible to perform various operations in the ground by digging while turning in the ground and reaching a place that cannot be reached only by a straight digging. In addition, drilling work in the ground can proceed without receiving drive force from the rod, etc. from the ground, eliminating the need for a drive force transmission mechanism that strongly rotates and pushes the rod, etc., on the ground side device, generating noise. In addition to simplifying and downsizing the structure of the ground side device, drilling into the ground can be performed even from places where sufficient space cannot be secured on the ground side, and work such as soil investigation and ground improvement can be performed , There are less restrictions on the construction site

なお、前記実施の形態に係る地中推進装置においては、装置本体10の先端ユニット11から地盤改良用の固化剤を噴射して地盤の掘削部分周囲所定範囲の地盤改良を実行可能な構成としているが、これに限らず、土質調査用として、削孔用流体以外の噴射は行わずに削孔のみ実施し、所定深さまでの削孔後、先端ユニット11の所定の試料採取手段で土砂試料を採取する構成とすることもでき、前記地盤改良の場合と同様、地盤の状態によらず所望の箇所まで削孔を進めて所望の作業を実行でき、従来の土質調査方法では困難であった地上から既存建物の下側の試料採取、調査等を低コストで実現できる。   In the underground propulsion apparatus according to the above-described embodiment, the ground improvement agent is injected from the tip unit 11 of the apparatus main body 10 to perform ground improvement within a predetermined range around the excavation part of the ground. However, the present invention is not limited to this, and for soil investigation, only the drilling is performed without performing injection other than the drilling fluid. After drilling to a predetermined depth, the soil sample is collected by the predetermined sampling means of the tip unit 11. As in the case of the ground improvement, it is possible to carry out a desired work by advancing a drilling hole to a desired location regardless of the state of the ground, which is difficult with the conventional soil investigation method. Therefore, it is possible to realize sampling, survey, etc. under the existing building at low cost.

また、前記実施の形態に係る地中推進装置において、削孔終了後の装置は装置最後部に接続されたワイヤ14を地上の引上げ装置で引上げることで地中から地上まで引上げられる構成としているが、これに限らず、前記実施形態同様のグリッパ部50と油圧シリンダ30を併用しての各ユニットごとに部分的に進む過程を繰返して装置全体を少しずつ推進させる手法を、装置の上方への移動に適用して装置全体を上昇させる構成とすることもでき、地上側の引上げ装置を不要とすることができ、地上側での装置固定スペースの制約をなくしてあらゆる箇所で削孔等の作業を実行できる。   Moreover, in the underground propulsion apparatus according to the above-described embodiment, the apparatus after the drilling is configured to be pulled up from the ground to the ground by pulling up the wire 14 connected to the rearmost part of the apparatus with the pulling device on the ground. However, the present invention is not limited to this, and a method for propelling the entire apparatus little by little by repeating the process of partially proceeding for each unit using the gripper unit 50 and the hydraulic cylinder 30 in the same manner as in the above embodiment is provided above the apparatus. It can also be configured to raise the entire device by applying it to the movement of the machine, eliminating the need for a lifting device on the ground side, eliminating restrictions on the device fixing space on the ground side, Can perform work.

また、前記実施の形態に係る地中推進装置において、油圧シリンダ30の伸縮による推進力を利用する際、固定側とする中間ユニット12又は後端ユニット13のグリッパ部50を外方へ拡張させて孔壁に強く密着させ、ユニットが推進方向と逆向きに発生する反力を受けても地盤90と一体となって動かない支持力を得、推進側とする他のユニットを推進可能にする構成としているが、この他、グリッパ部50を拡張させても推進反力に対する支持力が十分得られず固定側のユニットを静止状態に維持できないような地盤状態を想定して、図5に示すように、各ユニットの外面複数箇所に略板状の補助グリッパ51を突出・収容可能に配設し、前記実施の形態における地中推進過程のグリッパ部50を拡張させる期間に対応させて補助グリッパ51を突出させ、この補助グリッパ51を孔壁に食込ませてより強力な支持力を得る構成とすることもでき、推進反力を受止めて固定側のユニットを静止状態に維持できることとなり、確実に油圧シリンダ30による推進が行える。   Further, in the underground propulsion device according to the above-described embodiment, when the propulsive force generated by the expansion and contraction of the hydraulic cylinder 30 is used, the gripper portion 50 of the intermediate unit 12 or the rear end unit 13 as the fixed side is expanded outward. A structure that strongly adheres to the hole wall and obtains a supporting force that does not move integrally with the ground 90 even if the unit receives a reaction force that is generated in the direction opposite to the propulsion direction, so that other units on the propulsion side can be propelled. However, in addition to this, assuming a ground state in which the supporting unit for the propulsion reaction force cannot be sufficiently obtained even if the gripper portion 50 is expanded, and the stationary unit cannot be kept stationary, as shown in FIG. In addition, substantially plate-like auxiliary grippers 51 are provided at a plurality of locations on the outer surface of each unit so as to be able to protrude and accommodate, and the auxiliary grippers 51 are adapted to correspond to the period of expansion of the gripper portion 50 in the underground propulsion process in the above embodiment. The auxiliary gripper 51 can be made to protrude into the hole wall to obtain a stronger support force, and the propulsion reaction force can be received and the fixed unit can be kept stationary. The propulsion by the hydraulic cylinder 30 can be reliably performed.

本発明の一実施の形態に係る地中推進装置の側面図である。It is a side view of the underground propulsion apparatus which concerns on one embodiment of this invention. 本発明の一実施の形態に係る地中推進装置の屈曲状態説明図である。It is bending state explanatory drawing of the underground propulsion apparatus which concerns on one embodiment of this invention. 本発明の一実施の形態に係る地中推進装置におけるグリッパ部併用時の中間ユニット下方推進状態説明図である。It is intermediate unit downward propulsion state explanatory drawing at the time of gripper part combined use in the underground propulsion apparatus concerning one embodiment of the present invention. 本発明の一実施の形態に係る地中推進装置におけるグリッパ部併用時の後端ユニット下方推進状態説明図である。It is rear-end unit downward propulsion state explanatory drawing at the time of gripper part combined use in the underground propulsion apparatus which concerns on one embodiment of this invention. 本発明の他の実施形態に係る地中推進装置の補助グリッパ突出状態側面図である。It is an auxiliary gripper protrusion state side view of an underground propulsion device concerning other embodiments of the present invention.

符号の説明Explanation of symbols

1 地中推進装置
10 装置本体
11 先端ユニット
12 中間ユニット
13 後端ユニット
14 ワイヤ
15 噴射孔
16 排泥口
17 回転駆動部
18 スタビライザ
19 制御部
20 先端ビット
30 油圧シリンダ
40 インパクタ
50 グリッパ部
51 補助グリッパ
60 カバー
70 ケーシング
80 可撓管
90 地盤
DESCRIPTION OF SYMBOLS 1 Ground propulsion apparatus 10 Apparatus main body 11 Front end unit 12 Intermediate unit 13 Rear end unit 14 Wire 15 Injection hole 16 Mud outlet 17 Rotation drive part 18 Stabilizer 19 Control part 20 End bit 30 Hydraulic cylinder 40 Impactor 50 Gripper part 51 Auxiliary gripper 60 Cover 70 Casing 80 Flexible tube 90 Ground

Claims (4)

中空略円筒状の装置本体と、当該装置本体の先端部に配設される地盤掘削用の先端ビットとを少なくとも備え、前記先端ビットを進行方向前側として地中に導入され、地中を先端ビットの掘削動作で削孔しつつ進行する地中推進装置において、
前記装置本体が、円筒軸方向に並んだ複数の略円筒状ユニットの組合わせ構造とされてなり、
両端部間の長さを所定寸法範囲で変更調整自在とされ、前記装置本体をなす各ユニット間で両端部を対向する二つのユニット端部にそれぞれ連結されて複数配設され、ユニット間の間隔をそれぞれの配設位置で変化させる直線往復運動型のアクチュエータと、
前記装置本体の所定の一又は複数のユニット内に配設され、打撃に伴う衝撃力をユニット円筒軸方向に発生させるインパクタと、
前記装置本体の所定の一又は複数のユニット外側に拡縮可能に配設され、削孔した孔壁を押圧してユニットの地中位置を保持可能とするグリッパ部と、
前記装置本体の各ユニット間に配設されてユニット間を水密状態で伸縮及び屈曲可能に覆う可撓体製のカバーとを備えることを
特徴とする地中推進装置。
At least a hollow substantially cylindrical device body and a ground excavation tip bit disposed at the tip of the device body, the tip bit being introduced into the ground with the front side in the traveling direction, and the ground as a tip bit In the underground propulsion device that advances while drilling in the excavation operation of
The device body is a combined structure of a plurality of substantially cylindrical units arranged in the cylindrical axis direction,
The length between both ends can be changed and adjusted within a predetermined size range, and a plurality of units are respectively connected to the two unit ends facing each other between the units constituting the apparatus main body. Linear reciprocating motion type actuators that change at each arrangement position,
An impactor disposed in a predetermined unit or a plurality of units of the apparatus body, and generating an impact force associated with impact in a unit cylindrical axis direction;
A gripper portion that is disposed on the outside of the predetermined unit or a plurality of units of the apparatus main body so as to be able to expand and contract, and that can hold the ground position of the unit by pressing the drilled hole wall;
A ground propulsion apparatus, comprising: a cover made of a flexible body that is disposed between the units of the apparatus body and covers the units in a watertight manner so that the units can be expanded and contracted and bent.
前記請求項1に記載の地中推進装置において、
地上側供給装置と前記装置本体後部を連結する可撓管並びに装置本体内部流路を介して供給される所定の削孔用流体を装置本体先端部及び/又は先端ビットから所定圧力で噴射する一又は複数の噴射孔を備え、
前記先端ビットの掘削動作に加えて、地中を前記噴射孔から噴射した削孔用流体で削孔しつつ進行することを
特徴とする地中推進装置。
In the underground propulsion apparatus according to claim 1,
A predetermined drilling fluid supplied via a flexible pipe connecting the ground-side supply device and the rear portion of the apparatus main body and an internal flow path of the apparatus main body is ejected from the front end portion of the apparatus main body and / or the front end bit at a predetermined pressure. Or a plurality of injection holes,
In addition to excavation operation of the tip bit, the underground propulsion device proceeds while drilling the ground with the drilling fluid injected from the injection hole.
前記請求項1又は2に記載の地中推進装置において、
前記装置本体と略同径の可撓性を有する管体で形成され、装置本体後部に連結されて装置本体に追従しつつ削孔された孔内を進行するケーシングを備えることを
特徴とする地中推進装置。
In the underground propulsion apparatus according to claim 1 or 2,
A ground that is formed of a flexible tube having substantially the same diameter as that of the apparatus main body, is connected to a rear portion of the apparatus main body, and progresses through the drilled hole following the apparatus main body. Medium propulsion device.
前記請求項1ないし3のいずれかに記載の地中推進装置において、
地上側供給装置と前記装置本体後部を連結する可撓管並びに装置本体内部流路を介して供給される地盤改良用の固化剤を装置本体の先端部から少なくとも進行方向に対する横方向へ噴射可能な一又は複数の噴射孔を備え、
少なくとも装置全体を地上側へ後退させる際に、地中に前記噴射孔から固化剤を噴射して掘削土砂と固化剤を攪拌し、削孔箇所周囲所定範囲の地盤改良を行うことを
特徴とする地中推進装置。
In the underground propulsion apparatus according to any one of claims 1 to 3,
It is possible to inject at least a lateral direction with respect to the traveling direction from the distal end of the apparatus main body through a flexible tube that connects the ground side supply apparatus and the rear of the apparatus main body and a ground improvement agent supplied through the internal flow path of the apparatus main body. Comprising one or more injection holes,
At least when the entire apparatus is moved back to the ground side, the solidifying agent is injected into the ground from the injection hole to stir the excavated sediment and the solidifying agent, and the ground is improved within a predetermined range around the drilling site. Underground propulsion device.
JP2004223891A 2004-07-30 2004-07-30 Underground jacking device Pending JP2006045773A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011525574A (en) * 2007-12-19 2011-09-22 シュルンベルジェ ホールディングス リミテッド System that can change the direction of travel
JP2019127789A (en) * 2018-01-26 2019-08-01 ケミカルグラウト株式会社 Drilling bit
JP2019132090A (en) * 2018-02-02 2019-08-08 ケミカルグラウト株式会社 Drilling bit
JP2019184098A (en) * 2018-04-04 2019-10-24 鹿島建設株式会社 Burial method for underground heat exchanger

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62133787U (en) * 1986-02-17 1987-08-22
JPS63210389A (en) * 1987-02-27 1988-09-01 川崎製鉄株式会社 Rotary jet propelling construction method and apparatus
JPH0441890A (en) * 1990-06-08 1992-02-12 Touden Sekkei Kk Drilling device for hard material
JPH05311967A (en) * 1992-03-13 1993-11-22 Yoshida Tekkosho:Kk Ground drilling machine
JPH06221075A (en) * 1993-01-22 1994-08-09 Yoshida Tekkosho:Kk Boring machine by double header drill and soil improvement work method
JPH07109885A (en) * 1993-10-13 1995-04-25 Fujita Corp Stable construction method for tunnel working face
JP2001311386A (en) * 2000-02-22 2001-11-09 Okumura Engineering Corp Excavating device and jacking method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62133787U (en) * 1986-02-17 1987-08-22
JPS63210389A (en) * 1987-02-27 1988-09-01 川崎製鉄株式会社 Rotary jet propelling construction method and apparatus
JPH0441890A (en) * 1990-06-08 1992-02-12 Touden Sekkei Kk Drilling device for hard material
JPH05311967A (en) * 1992-03-13 1993-11-22 Yoshida Tekkosho:Kk Ground drilling machine
JPH06221075A (en) * 1993-01-22 1994-08-09 Yoshida Tekkosho:Kk Boring machine by double header drill and soil improvement work method
JPH07109885A (en) * 1993-10-13 1995-04-25 Fujita Corp Stable construction method for tunnel working face
JP2001311386A (en) * 2000-02-22 2001-11-09 Okumura Engineering Corp Excavating device and jacking method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011525574A (en) * 2007-12-19 2011-09-22 シュルンベルジェ ホールディングス リミテッド System that can change the direction of travel
JP2019127789A (en) * 2018-01-26 2019-08-01 ケミカルグラウト株式会社 Drilling bit
JP7032152B2 (en) 2018-01-26 2022-03-08 ケミカルグラウト株式会社 Bit for drilling
JP2019132090A (en) * 2018-02-02 2019-08-08 ケミカルグラウト株式会社 Drilling bit
JP7037861B2 (en) 2018-02-02 2022-03-17 ケミカルグラウト株式会社 Bit for drilling
JP2019184098A (en) * 2018-04-04 2019-10-24 鹿島建設株式会社 Burial method for underground heat exchanger
JP7010751B2 (en) 2018-04-04 2022-01-26 鹿島建設株式会社 How to bury a geothermal heat exchanger

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