JP4603990B2 - Horizontal hole drilling rig - Google Patents

Horizontal hole drilling rig Download PDF

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JP4603990B2
JP4603990B2 JP2006060214A JP2006060214A JP4603990B2 JP 4603990 B2 JP4603990 B2 JP 4603990B2 JP 2006060214 A JP2006060214 A JP 2006060214A JP 2006060214 A JP2006060214 A JP 2006060214A JP 4603990 B2 JP4603990 B2 JP 4603990B2
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auger
tube
earth
screw auger
sand
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JP2007239226A (en
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洋二 川合
伸康 熊澤
晋平 松田
章 井出
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Okumura Corp
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Description

本発明は、地盤中にスクリューオーガを使用して断面縦長矩形状の横孔を掘削する横孔掘削装置に関するものである。   The present invention relates to a horizontal hole excavating apparatus for excavating a horizontal hole having a vertically long cross section using a screw auger in the ground.

従来から、スクリューオーガを用いて矩形断面のトンネルを掘削する際に、該スクリューオーガを上下左右に揺動させながら前方の地盤を掘削する装置が採用されている。例えば、特許文献1に記載されているように、管状のケーシング内の隔壁中央部にスクリューオーガの回転駆動手段であるカッタローダの固定部を支持させると共に該カッタローダの回転部にスクリューオーガの基端部をジャッキによって上下回動自在に連結することにより、このスクリューオーガの先端カッタヘッドをケーシングの前端開口部から前方に突出させた状態で上下左右に揺動させながら前方の地盤を掘削するように構成した掘削装置が知られている。   Conventionally, when excavating a tunnel having a rectangular cross section using a screw auger, an apparatus for excavating the ground in front of the screw auger while swinging up and down and left and right has been adopted. For example, as described in Patent Document 1, a fixed portion of a cutter loader that is a rotation driving means of a screw auger is supported at a central portion of a partition wall in a tubular casing, and a proximal end portion of the screw auger is provided at a rotating portion of the cutter loader. By connecting the top and bottom of the screw auger so that they can be pivoted up and down by a jack, the front ground is excavated while swinging up and down and left and right in a state of protruding forward from the front end opening of the casing. Drilling rigs are known.

さらに、特許文献2に記載されているように、ケーシングの前端部内のフレームに左右方向に回動する旋回台を配設し、この旋回台上にジャッキによって上下方向に回動するスクリューオーガの回転駆動手段を回動自在に支持すると共にこの回転駆動手段にスクリューオーガの基端部を連結することにより、このスクリューオーガの先端カッタヘッドをケーシングの前端開口部から前方に突出させた状態で上下左右に揺動させながら前方の地盤を掘削するように構成した掘削装置も開発されている。
特開昭58−44195号公報 特開平1−318685号公報
Further, as described in Patent Document 2, a swivel base that rotates in the left-right direction is disposed on the frame in the front end portion of the casing, and a screw auger that rotates in a vertical direction by a jack on the swivel base. By supporting the drive means in a freely rotatable manner and connecting the base end of the screw auger to the rotational drive means, the top cutter head of the screw auger is projected forward, downward, left and right with the front end opening of the casing. An excavator that is configured to excavate the ground in front while being swung is also developed.
JP 58-44195 A Japanese Unexamined Patent Publication No. 1-318685

しかしながら、上記いずれの掘削装置においても、スクリューオーガの回転駆動手段はケーシング内の所定位置に設置されていてこの回転駆動手段により回転駆動されるスクリューオーガを取り外して後方に撤去、回収することが困難であるため、前方の掘削地盤中に礫や玉石等が存在した場合、これらを撤去する等の対処を行うことができず、掘削が不能となる事態が発生する虞れがある。さらに、掘削中において、カッタヘッドに突設している掘削ビット等が損傷した場合においてもその交換作業が困難であるといった問題点があった。   However, in any of the above excavators, the rotation driving means of the screw auger is installed at a predetermined position in the casing, and it is difficult to remove and collect the screw auger that is rotationally driven by this rotation driving means to the rear. Therefore, when gravel, cobblestones, etc. exist in the excavation ground ahead, it is not possible to take measures such as removing them, and there is a possibility that excavation becomes impossible. Furthermore, during excavation, even when an excavation bit protruding from the cutter head is damaged, it is difficult to replace the excavation bit.

本発明はこのような問題点に鑑みてなされたもので、その目的とするところは、横孔の掘削中において、前方の掘削地盤中に礫や玉石等が存在した場合には、これらの礫や玉石を容易に除去し得ると共に掘削ビット等が損傷した場合においても、その交換作業等が容易に行え、また、掘削した土砂を後方に円滑に排出しながら横孔を能率よく掘進することができる横孔掘削装置を提供するにある。   The present invention has been made in view of such problems, and the object of the present invention is that when there is gravel or cobblestone in the excavation ground ahead during excavation of a horizontal hole, And cobblestones can be easily removed and excavation bits etc. can be easily replaced, and the excavation of the excavated earth and sand can be carried out efficiently while expelling the horizontal holes. It is in providing a horizontal hole drilling device.

上記目的を達成するために本発明の横孔掘削装置は、請求項1に記載したように、推進手段によって前方に押し進められる矩形断面の管体内にオーガ支持筒を前後方向に移動可能に且つ昇降可能に吊支すると共にこのオーガ支持筒内に上記管体の前方地盤を掘削するスクリューオーガの基部を挿入してオーガ支持筒の後端部内に配設している回転駆動手段に連結してあり、さらに、オーガ支持筒の両側面に軸体を突設してこの軸体を管体の両側壁部内面に固着している軸受体に上下方向に着脱自在に且つ回動自在に嵌合、支持させていると共に、上記軸体を軸受体から離脱させてオーガ支持筒をスクリューオーガと一体的に後方側に撤去可能に構成していることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, a horizontal hole excavation device is capable of moving an auger support cylinder back and forth in a rectangular cross section that is pushed forward by propulsion means and moving up and down. capable there coupled to a rotary drive means for inserting the base of the screw auger is disposed within the rear end portion of the auger support cylinder drilling a front ground of the tube to the auger support cylinder while Tsu支 Further, a shaft body is provided on both side surfaces of the auger support cylinder, and the shaft body is detachably fitted in a vertical direction to a bearing body fixed to the inner surface of both side wall portions of the tube body, and can be freely rotated. The shaft body is detached from the bearing body, and the auger support cylinder is configured to be removable rearwardly integrally with the screw auger .

このように構成した横孔掘削装置において、請求項に係る発明は、上記管体内にオーガ支持筒を前後方向に移動可能に吊支すると共にこのオーガ支持筒内にスクリューオーガの基部を挿入してオーガ支持筒の後端部内に配設している回転駆動手段に連結し、さらに、オーガ支持筒にこの回転駆動手段を前後動させて上記スクリューオーガの先端カッタヘッドを管体の前端開口部から出没させる前後動用ジャッキを装着すると共に、オーガ支持筒と管体の上壁部内面間にスクリューオーガの上下回動用ジャッキを着脱自在に配設した構造としている。 In the horizontal hole excavating apparatus configured as described above, the invention according to claim 2 suspends the auger support cylinder so as to be movable in the front-rear direction in the pipe body, and inserts the base portion of the screw auger into the auger support cylinder. The auger support cylinder is connected to the rotation driving means disposed in the rear end portion of the auger support cylinder, and the rotation drive means is moved back and forth in the auger support cylinder so that the tip cutter head of the screw auger is connected to the front end opening of the tube body. A structure is provided in which a jack for back and forth movement that is projected and retracted from the top and a jack for vertically rotating the screw auger is detachably disposed between the auger support tube and the inner surface of the upper wall portion of the tubular body.

請求項に係る発明は、上記管体を断面縦長矩形状とし、上記スクリューオーガによる掘削径をこの管体の縦長矩形断面の横幅に略等しい径に形成していると共に、管体の前端部内底面上にオーガ支持筒から突出しているスクリューオーガの前部を受け入れ可能な土砂収容導出樋体を前端から後端に向かって斜め上方に傾斜させた状態で配設してあり、さらに、この土砂収容導出樋体の後端導出口の下方から管体の後端に向かって土砂排出手段を配設していることを特徴としている。 According to a third aspect of the present invention, the tubular body has a rectangular shape in cross section, the excavation diameter by the screw auger is formed to have a diameter substantially equal to the lateral width of the longitudinal rectangular cross section of the tubular body, and the inside of the front end portion of the tubular body On the bottom surface, an earth / sand containing lead-out housing that can accept the front part of the screw auger protruding from the auger support cylinder is disposed in a state inclined obliquely upward from the front end toward the rear end. It is characterized in that earth and sand discharging means is disposed from below the rear end outlet of the housing outlet housing toward the rear end of the pipe body.

また、請求項に係る発明は、上記管体内の前端開口部における両側壁部の前端面をスクリューオーガのカッタヘッドの上下回動軌跡に沿う凸円弧状前端面に形成していること特徴とし、請求項に係る発明は、管体の内底部上に配設している上記土砂排出手段をスクリューコンベアから構成し、このスクリューコンベアの搬送終端部に、管体の後端部における一側下部に配設している土砂排出シュートの上端部を連通させ、この土砂排出シュートの排出口を管体の一側下部から外部に突出させて土砂を管体外部に排出するように構成していることを特徴とする。 Further, the invention according to claim 4 is characterized in that the front end surfaces of both side wall portions in the front end opening in the tubular body are formed as convex arc-shaped front end surfaces along the vertical rotation locus of the cutter head of the screw auger. In the invention according to claim 5 , the earth and sand discharging means disposed on the inner bottom portion of the pipe body is constituted by a screw conveyor, and one end of the rear end portion of the pipe body is provided at the transfer terminal portion of the screw conveyor. The upper end of the earth and sand discharge chute arranged in the lower part is communicated, and the earth and sand discharge chute is configured to discharge the earth and sand to the outside of the pipe by projecting from the lower part of one side of the pipe to the outside. It is characterized by being.

請求項1に係る発明によれば、推進手段によって前方に押し進められる矩形断面の管体内に該管体の前方地盤を掘削するスクリューオーガを上下回動自在に且つ管体の後方側に撤去可能に配設しているので、管体の前方掘削地盤中に礫や玉石等が存在した場合には、スクリューオーガを後方に撤去することによって作業員が管体内を通じて該管体の前端開口部内まで容易に入って行くことができ、従って、掘削地盤中に存在する礫や玉石等の撤去作業が確実に行うことができるものであり、さらに、スクリューオーガのカッタヘッドに突設している掘削ビット等が損傷した場合においても、該スクリューオーガを後方に撤去することによって掘削ビットの交換作業や補修作業が容易に行え、横孔を所定長さまで確実に掘削することができる。   According to the first aspect of the present invention, the screw auger for excavating the front ground of the tubular body can be pivoted up and down and removed to the rear side of the tubular body in the tubular section having a rectangular cross section pushed forward by the propulsion means. Therefore, when gravel, cobblestone, etc. exist in the excavation ground in front of the tube, the screw auger is removed rearward so that the operator can easily reach the front end opening of the tube through the tube. Therefore, the removal work such as gravel and cobblestone existing in the excavation ground can be surely performed, and further, the excavation bit protruding from the cutter head of the screw auger, etc. Even if the screw is damaged, the excavating bit can be easily replaced or repaired by removing the screw auger to the rear, and the horizontal hole can be reliably excavated to a predetermined length.

また、上記管体内にオーガ支持筒を前後方向に移動可能に且つ昇降可能に吊支すると共にこのオーガ支持筒内にスクリューオーガの基部を挿入してオーガ支持筒の後端部内に配設している回転駆動手段に連結してなり、さらに、オーガ支持筒の両側面に軸体を突設してこの軸体を管体の両側壁部内面に固着している軸受体に上下方向に着脱自在に且つ回動自在に嵌合、支持させているので、オーガ支持筒を吊り下げて該オーガ支持筒の両側面に突設している軸体を管体の両側壁部内面に固着している軸受体に上方から嵌合、支持させることにより、オーガ支持筒を管体内における正確な位置に簡単に回動自在に配設することができると同時に該オーガ支持筒に支持されているスクリューオーガもその先端のカッタヘッドによって前方の地盤を掘削可能な所定位置に配設することができる。 The auger support tube is suspended in the tube so as to be movable in the front-rear direction and can be moved up and down, and the base of the screw auger is inserted into the auger support tube and disposed in the rear end portion of the auger support tube. In addition, it is connected to the rotary drive means, and a shaft body projects from both side surfaces of the auger support cylinder, and this shaft body is detachably attached to the bearing body fixed to the inner surface of both side wall portions of the tube body in the vertical direction. Since the auger support tube is suspended and the shaft body projecting on both side surfaces of the auger support tube is fixed to the inner surfaces of both side wall portions of the tube body. By fitting and supporting the bearing body from above, the auger support tube can be easily pivoted at an accurate position in the pipe body, and at the same time, a screw auger supported by the auger support tube is also provided. The front ground is cut by the cutter head at the tip. Can be disposed at a predetermined position can be cut.

この状態にして回転駆動手段によりスクリューオーガを回転させながら管体を推進させて前方の地盤を掘削する時に、その掘削時の推進反力を上記軸体からこの軸体を支持している軸受体を介して管体に確実に受止させながら円滑に掘進することができる。また、オーガ支持筒を吊り上げることによって上記軸受体からその軸体を簡単に離脱させることができると共にこの状態からスクリューオーガと一体的に後方に移動させることができ、従って、掘削地盤中に存在する礫や玉石等の撤去作業や掘削ビットの交換作業等を容易に行うことができる。   In this state, when the tube body is propelled while rotating the screw auger by the rotation driving means to excavate the ground in front, the propulsion reaction force at the time of excavation supports the shaft body from the shaft body. It is possible to dig smoothly while being surely received by the pipe via the. Further, by lifting the auger support cylinder, the shaft body can be easily detached from the bearing body and can be moved backward integrally with the screw auger from this state, and therefore exists in the excavation ground. Removal work such as gravel and cobblestone and excavation bit replacement work can be easily performed.

さらに、請求項に係る発明によれば、オーガ支持筒と管体の上壁部下面間をスクリューオーガの上下回動用ジャッキにより連結しているので、オーガ支持筒の両側面を上記軸体によって管体側の軸受体に回動自在に支持させて状態でこの上下回動用ジャッキを伸縮させることにより、スクリューオーガの先端カッタヘッドを管体の開口端部に沿って上下方向に往復移動させながら、管体前方の地盤を確実に掘削することができる。その上、上記オーガ支持筒にスクリューオーガの上記回転駆動手段を前後動させるジャッキを装着しているので、このジャッキを伸長させることによってスクリューオーガのカッタヘッドを管体の開口端から突出させてその前方地盤を管体の推進に先行して掘削することができ、従って、その掘削跡に管体の開口端部を挿入するようにして推進させることができて僅かな推進力により管体を所定方向に正確に掘進させることができる。 Further, according to the invention of claim 2 , since the auger support tube and the lower surface of the upper wall portion of the tube body are connected by the jack for vertical rotation of the screw auger, both side surfaces of the auger support tube are connected by the shaft body. By extending and retracting the up and down rotation jack in a state where it is rotatably supported by the bearing body on the tube side, the tip cutter head of the screw auger is reciprocated in the vertical direction along the opening end of the tube body, The ground in front of the tube can be excavated reliably. In addition, since the jack for moving the rotational drive means of the screw auger back and forth is mounted on the auger support cylinder, the cutter head of the screw auger is protruded from the open end of the tubular body by extending the jack. The front ground can be excavated prior to the propulsion of the tube, and therefore the tube can be propelled by inserting the open end of the tube into the excavation trace, and the tube is determined with a slight propulsive force. Can be dug accurately in the direction.

また、請求項に係る発明によれば、管体の断面形状を縦長矩形状に形成すると共に、スクリューオーガによる掘削径を管体の縦長矩形断面の横幅に略等しい径に形成しているので、スクリューオーガを上下方向に回動させるだけで管体の開口端の前方地盤を略全面的に能率よく掘削することができ、その上、管体の前端部内底面上にオーガ支持筒から突出しているスクリューオーガの前部を受け入れ可能な土砂収容導出樋体を前端から後端に向かって斜め上方に傾斜させた状態で配設しているので、スクリューオーガの先端カッタヘッドによって掘削された土砂を該土砂収容導出樋体内に集中的に堆積させることができると共に、スクリューオーガを下回動させてこの土砂収容導出樋体内に該スクリューオーガの前部を沿わせることにより、このスクリューオーガによって該土砂収容導出樋体内の土砂を円滑且つ能率よく後方に導出させることができ、さらに、この土砂収容導出樋体の後端導出口の下方から管体の後端に向かって土砂排出手段を配設しているので、この土砂排出手段によって掘削土砂を管体の後方部に向かって確実に排出することができる。 According to the invention of claim 3 , the cross-sectional shape of the tubular body is formed in a vertically long rectangular shape, and the excavating diameter by the screw auger is formed to have a diameter substantially equal to the lateral width of the vertically long rectangular cross section of the tubular body. By simply rotating the screw auger up and down, the front ground at the open end of the tube can be excavated almost entirely efficiently, and in addition, it protrudes from the auger support tube onto the inner bottom surface of the front end of the tube. Since the earth and sand containing lead-out housing that can accept the front part of the screw auger is inclined obliquely upward from the front end to the rear end, the earth and sand excavated by the tip cutter head of the screw auger is removed. The sediment can be intensively accumulated in the earth-and-sand containing lead-out housing, and the screw auger is rotated downward so that the front portion of the screw auger is placed in the earth-and-sand containing lead-out housing. The screw auger can smoothly and efficiently lead the earth and sand in the earth-and-sand containing lead-out housing to the rear, and the earth and sand from below the rear-end outlet of the earth-and-sand containing lead-out housing toward the rear end of the pipe body. Since the discharging means is provided, the excavated earth and sand can be reliably discharged toward the rear portion of the tubular body by the earth and sand discharging means.

請求項に係る発明によれば、上記管体の前端開口部における両側壁部の前端面をスクリューオーガのカッタヘッドの上下回動軌跡に沿う凸円弧状前端面に形成しているので、スクリューオーガのカッタヘッドを管体の開口前端面から常に所定長だけ前方に突出させた状態で上下回動させながら地盤を掘削することができ、その掘削に後続して管体を円滑且つ正確な方向に推進させることができる。 According to the fourth aspect of the present invention, the front end surfaces of the both side wall portions in the front end opening of the tubular body are formed on the convex arc-shaped front end surface along the vertical turning locus of the cutter head of the screw auger. The ground can be excavated while the auger cutter head is rotated up and down in a state where the cutter head of the auger always protrudes forward from the front end face of the tube, and the tube is smoothly and accurately oriented following the excavation. Can be promoted.

さらに、請求項に係る発明によれば、管体内の前端部内底面上に配設している上記土砂収容導出樋体から管体内を通じて掘削土砂を後方に排出する上記土砂排出手段をスクリューコンベアから構成し、このスクリューコンベアの搬送終端部に、管体の後端部における一側下部に配設している土砂排出シュートの上端部を連通させ、この土砂排出シュートの排出口を管体の一側下部から外部に突出させて土砂を管体外部に排出するように構成しているので、土砂収容導出樋体から該スクリューオーガの前端部上に排出された掘削土砂を、このスクリューオーガによって管体の内底面に沿って円滑且つ確実に管体の後端部にまで搬出することができると共に管体の一側下部から土砂排出シュートを通じて連続自動的に外部に排出させることができる。 Furthermore, according to the invention which concerns on Claim 5 , the said earth-and-sand discharge means which discharges excavated earth and sand through the pipe body from the said earth-and-sand accommodation lead-out body arrange | positioned on the inner bottom face of the front end part in a pipe body is carried out from a screw conveyor. The upper end of the earth and sand discharge chute arranged at the lower part on one side at the rear end of the pipe body is communicated with the conveying terminal end of the screw conveyor, and the discharge port of the earth and sand discharge chute is connected to the pipe body. Since the earth and sand are projected to the outside from the lower part of the side and discharged to the outside of the pipe body, the excavated earth and sand discharged on the front end of the screw auger from the earth and sand containing lead-out housing is piped by this screw auger. It can be smoothly and reliably delivered to the rear end of the pipe along the inner bottom surface of the body and can be continuously and automatically discharged from the lower part of the pipe through the earth discharge chute. That.

そして、この横孔掘削装置を軌道下又は道路下に推進、埋設すべき地下構造物の両側壁部の前方に複数本、その排出シュートを内側に向けた状態で上下に積層状態で配設し、地下構造物の両側壁部の前方地盤を掘削するように構成しておくことによって、地下構造物を所定方向に正確に推進、埋設することができると共に、掘削土砂を管体の一側下部から排出シュートを通じて地下構造部の前端開口部の前方側に排出し、地下構造物内を通じて後方に能率よく排除することができる。   And, this horizontal hole excavator is propelled under the track or under the road, and a plurality of them are placed in front of both side walls of the underground structure to be buried, and the discharge chutes are arranged in a stacked state with the discharge chute facing inward. By constructing to excavate the front ground on both side walls of the underground structure, the underground structure can be accurately propelled and buried in a predetermined direction, and the excavated earth and sand can be Can be discharged through the discharge chute to the front side of the front end opening of the underground structure and efficiently removed backward through the underground structure.

本発明の具体的な実施の形態を図面について説明すると、図1は横孔掘削装置の要部の縦断側面図、図2はその正面図、図3、図4はそれぞれ図1におけるA−A線、B−B線における背面図であって、1は一定長さを有する縦長矩形断面の角鋼管からなる管体で、この管体1の前部内における上下方向の中央部に管体1の前端開口部を通じて前方の地盤を掘削するスクリューオーガ2を上下回動自在に且つ管体1の後方側に移動させて管体1の後端開口部から撤去可能に配設している。   FIG. 1 is a longitudinal side view of a main part of a horizontal hole excavating apparatus, FIG. 2 is a front view thereof, and FIGS. 3 and 4 are AA in FIG. 1 is a tube body made of a rectangular steel tube having a vertically long rectangular cross section having a certain length, and the tube body 1 is located at the center in the vertical direction in the front portion of the tube body 1. A screw auger 2 for excavating the ground in front through the front end opening is disposed so as to be pivotable up and down and to the rear side of the tube 1 so as to be removable from the rear end opening of the tube 1.

この構成をさらに詳しく説明すると、スクリューオーガ2の基部は、管体1の前部内における上下方向の中央部にその長さ方向を前後方向に向けた状態で配設している円筒形状のオーガ支持筒3内に挿入されて、該オーガ支持筒3の後端部内に配設している回転駆動モータよりなる回転駆動手段4の回転軸にそのオーガ軸の基端を着脱自在に連結している一方、上記管体1の上壁部1aの下面両側部における該管体1の前部から後端開口部に至る長さ部分にレール部材5、5を固着し、このレール部材5、5に移動台6を前後移動自在に装着すると共に該移動台6の下面両側部に昇降装置であるチエンブロック7、7を介して上記オーガ支持筒3の長さ方向の中央部両側面を昇降自在に吊支させることにより、上記レール部材5、5に沿ってオーガ支持筒3を台車体6から吊下げた状態で前後方向に移動させるように構成している。   This configuration will be described in more detail. The base portion of the screw auger 2 is a cylindrical auger support that is disposed at the center in the vertical direction in the front portion of the tube body 1 with its length direction directed in the front-rear direction. The base end of the auger shaft is detachably connected to the rotation shaft of the rotation driving means 4 which is inserted into the tube 3 and is provided in the rear end portion of the auger support tube 3. On the other hand, rail members 5 and 5 are fixed to the length portions from the front portion of the tubular body 1 to the rear end opening at both sides of the lower surface of the upper wall portion 1a of the tubular body 1. A movable table 6 is mounted so as to be movable back and forth, and both side surfaces of the central portion of the auger support tube 3 in the length direction can be moved up and down via chain blocks 7 and 7 which are lifting devices on both sides of the lower surface of the movable table 6. By suspending and supporting along the rail members 5 and 5 above, It is configured to move in the longitudinal direction of the glass support tube 3 in a state of suspended from carriage body 6.

なお、上記オーガ支持筒3の長さ方向の吊り下げ位置は上記スクリューオーガ2、オーガ支持筒3、回転駆動手段4及び後述する前後動ジャッキ8、支持フレーム10を一体に設けてなる掘削手段Aの重心位置付近に設けることが望ましい。そうすることによって掘削手段Aの前後移動を円滑に行うことができる。   The auger support tube 3 is suspended in the longitudinal direction at the position where the screw auger 2, the auger support tube 3, the rotation drive unit 4, the forward / backward movement jack 8, which will be described later, and the support frame 10 are integrally provided. It is desirable to provide near the center of gravity position. By doing so, the excavating means A can be smoothly moved back and forth.

さらに、オーガ支持筒3の後方側の上方における上記レール部材5、5の下面にスクリューオーガ2の上下回動用ジャッキ8、8の基端面を回動自在に且つ取り外し自在に連結すると共に、これらの上下回動用ジャッキ8、8を下方に向かって斜め前方に傾斜させた状態にしてそのロッド先端を上記オーガ支持筒3の後端両側面に回動自在に連結し、上下回動用ジャッキ8、8の該ロッドを伸縮させることによって、オーガ支持筒3と一体的にスクリューオーガ2を上下方向に回動させるように構成している。   Further, the base end surfaces of the jacks 8 and 8 for the vertical rotation of the screw auger 2 are rotatably and detachably connected to the lower surfaces of the rail members 5 and 5 above the rear side of the auger support tube 3. With the up-and-down turning jacks 8 and 8 inclined downward and obliquely forward, the tip of the rod is pivotally connected to both side surfaces of the rear end of the auger support tube 3 so that the up-and-down turning jacks 8 and 8 are connected. The screw auger 2 is configured to rotate up and down integrally with the auger support tube 3 by extending and contracting the rod.

上記スクリューオーガ2の上下方向の回動支点は、図5、図6に示すように、上記掘削手段Aの重心位置付近におけるオーガ支持筒3の両側面に突設した軸体17、17と、上記管体1の両側壁部1b、1bの内面に固着し、上端が上方に向かって開口している凹状の軸受体18、18とからなり、上方側から上記軸体17、17を軸受体18、18に挿嵌、受止させることにより、オーガ支持筒3を上下回動自在に且つ上方に離脱可能に支持させている。また、オーガ支持筒3の両側面に突設した軸体17、17と管体1の両側壁部内面に固着している凹状の軸受体18、18との嵌合によって、スクリューオーガ2による掘削時の推進反力を受止している。なお、軸受体18、18は管体1の前端から後方に向かってスクリューオーガ2の長さに略等しい距離を存した位置に固着されていて、この軸受体18、18にオーガ支持筒3の両側面に突設している上記軸体17、17を回動自在に支持させた時に、スクリューオーガ2のカッタヘッド2aが管体1の前方地盤を掘削可能な前端開口部に位置するように構成している。   As shown in FIGS. 5 and 6, the vertical abutment fulcrum of the screw auger 2 includes shaft bodies 17, 17 projecting on both side surfaces of the auger support cylinder 3 in the vicinity of the center of gravity of the excavating means A, The tubular body 1 is composed of concave bearing bodies 18 and 18 which are fixed to the inner surfaces of both side wall portions 1b and 1b of the tubular body 1 and whose upper ends are open upward, and the shaft bodies 17 and 17 are bearing bodies from above. The auger support cylinder 3 is supported so as to be pivotable up and down and detachable upward by being inserted into 18 and 18 and received. In addition, excavation by the screw auger 2 is achieved by fitting the shaft bodies 17, 17 projecting on both side surfaces of the auger support cylinder 3 with the concave bearing bodies 18, 18 fixed to the inner surfaces of both side walls of the tube body 1. The propulsion reaction force of time is received. The bearing bodies 18 and 18 are fixed to positions at a distance substantially equal to the length of the screw auger 2 from the front end of the tube body 1 to the rear, and the auger support cylinder 3 is attached to the bearing bodies 18 and 18. When the shafts 17 and 17 projecting on both side surfaces are rotatably supported, the cutter head 2a of the screw auger 2 is positioned at the front end opening where the front ground of the tube 1 can be excavated. It is composed.

また、スクリューオーガ2の上記回転駆動手段4をオーガ支持筒3の後部内において前後移動自在に設置する一方、オーガ支持筒3の後端面中央部に後方に向かって支持フレーム10を突設してこの支持フレーム10に前後方向に向けてスクリューオーガ2の前後動用ジャッキ9を装着し、該前後動用ジャッキ9のロッド先端を回転駆動手段4の後端面に連結して、この前後作動用ジャッキ9のロッドを伸縮させることにより、スクリューオーガ2の先端カッタヘッド2aを管体1の前端開口部から出没させるように構成している。   Further, the rotational driving means 4 of the screw auger 2 is installed in the rear part of the auger support cylinder 3 so as to be movable back and forth, while a support frame 10 is projected rearward at the center of the rear end surface of the auger support cylinder 3. A forward / backward movement jack 9 of the screw auger 2 is attached to the support frame 10 in the front / rear direction, and the rod tip of the forward / backward movement jack 9 is connected to the rear end surface of the rotation driving means 4. The tip cutter head 2a of the screw auger 2 is configured to protrude and retract from the front end opening of the tube body 1 by expanding and contracting the rod.

なお、スクリューオーガ2の先端カッタヘッド2aは、スクリューオーガ2の先端中央部と該先端から半径方向に突出したスクリューの前端面とに前方に向かってカッタビットを突設してなり、このカッタヘッド2aによる掘削径は管体1の横幅に略等しい径に形成している。さらに、上記管体1の前端開口部における互いに平行に対向している両側壁部1b、1bの前端面を、スクリューオーガ2の先端カッタヘッド2aの上下回動軌跡に沿った同一湾曲度の凸円弧状前端面1dに形成している。   The tip cutter head 2a of the screw auger 2 is formed by projecting a cutter bit forward from the center of the tip of the screw auger 2 and the front end face of the screw projecting radially from the tip. The excavation diameter by 2a is formed to have a diameter approximately equal to the lateral width of the tube 1. Further, the front end surfaces of the side wall portions 1b and 1b facing each other in parallel at the front end opening of the tubular body 1 are projected with the same curvature along the vertical rotation trajectory of the tip cutter head 2a of the screw auger 2. It is formed on the arcuate front end face 1d.

上記管体1の前端部内底面上には、断面U字状の土砂収容導出樋体11をその前端開口部を管体1内の前端開口部における下壁部1c上で前方に向かって開口させ、且つ、その前端から後端開口部に向かって斜め上方に傾斜させた状態で配設、固定している。この土砂収容導出樋体11はスクリューオーガ2の前部の下半部を受け入れ可能な大きさに形成されていると共にその内底面を上記スクリューオーガ2のスクリューの下周部に沿った円弧状の湾曲面に形成してあり、さらに、前端から後端に向かう傾斜角度をスクリューオーガ2が下方に回動してその前部の下半部をこの土砂収容導出樋体11内に受け入れさせた時の該スクリューオーガ2の傾斜角度と同一角度に設定してあり、従って、この土砂収容導出樋体11の全長に亘ってスクリューオーガ2の前部の下半部を受け入れるように構成している。   On the inner bottom surface of the front end portion of the tubular body 1, a sand storage / leading housing 11 having a U-shaped cross section is opened frontward on the lower wall portion 1 c in the front end opening portion of the tubular body 1. And, it is arranged and fixed in a state of being inclined obliquely upward from the front end toward the rear end opening. The earth-and-sand containing lead-out housing 11 is formed in a size that can receive the lower half of the front portion of the screw auger 2 and has an inner bottom surface that is arcuate along the lower peripheral portion of the screw of the screw auger 2. When the screw auger 2 is rotated downward at an inclination angle from the front end to the rear end and the lower half of the front portion is received in the earth-and-sand containing lead-out housing 11 Therefore, the lower half of the front portion of the screw auger 2 is received over the entire length of the earth-and-sand containing lead-out housing 11.

この土砂収容導出樋体11の後端導出口の下方には、ケーシング12a とこのケーシング12a 内に回転自在に配設されたスクリューコンベア12b とからなる土砂排出手段12の前端部が配設されてあり、この土砂排出手段12を、管体1の下壁部1cの内底面上に沿って前端部から後端開口部に向かって斜め上方に緩傾斜させた状態で設置していると共にケーシング12a の後端から後方に突出したスクリューコンベア12b の回転軸の後端を管体1の後端下部内に配設した回転駆動モータ13(図7に示す)に連結している。この土砂排出手段12の上記ケーシング12a は少なくともその前端部を上方に向かって開口させて上記土砂収容導出樋体11の後端導出口から排出される掘削土砂を該ケーシング12a の前端部内に落下させるように構成している。   Below the rear end outlet of the earth and sand containing lead-out housing 11 is disposed a front end portion of the earth and sand discharging means 12 comprising a casing 12a and a screw conveyor 12b rotatably arranged in the casing 12a. The earth and sand discharging means 12 is installed in a state of being gently inclined obliquely upward from the front end portion toward the rear end opening portion along the inner bottom surface of the lower wall portion 1c of the tubular body 1 and the casing 12a. The rear end of the rotating shaft of the screw conveyor 12b protruding rearward from the rear end is connected to a rotary drive motor 13 (shown in FIG. 7) disposed in the lower portion of the rear end of the tube body 1. The casing 12a of the earth and sand discharging means 12 opens at least the front end portion thereof upward, and the excavated earth and sand discharged from the rear end outlet of the earth and sand containing lead-out housing 11 is dropped into the front end portion of the casing 12a. It is configured as follows.

さらに、図7、図8に示すように、管体1の後端部側においては、土砂排出手段12におけるケーシング12a の後端下部に、スクリューコンベア12b の後端部にまで搬送されてきた掘削土砂を外部に排出する開口部14を設けてこの開口部14から土砂排出シュート15を通じて管体1の後端部一側方に掘削土砂を排出するようにしている。この土砂排出シュート15は、上記開口部14に連結、連通している内側開口端から管体1の一側下部を通じて斜め下方に傾斜させた状態で突出させている。また、管体1の後端面と、この管体1の後方に設けている支持壁面との間に数本の推進ジャッキよりなる推進手段16を介在させ、この推進手段16によって管体全体を前方に推進させるように構成している。   Further, as shown in FIGS. 7 and 8, on the rear end side of the pipe body 1, the excavation that has been conveyed to the rear end portion of the casing 12 a in the earth and sand discharging means 12 and to the rear end portion of the screw conveyor 12 b. An opening 14 for discharging the earth and sand to the outside is provided, and the excavated earth and sand is discharged from the opening 14 to one side of the rear end of the tubular body 1 through the earth and sand discharge chute 15. The earth and sand discharge chute 15 is protruded in a state of being inclined obliquely downward from the inner opening end connected to and communicating with the opening 14 through the lower part on one side of the tubular body 1. Further, a propulsion means 16 consisting of several propulsion jacks is interposed between the rear end surface of the tube body 1 and a support wall surface provided behind the tube body 1, and the entire tube body is moved forward by the propulsion means 16. It is configured to promote.

このように構成した横孔掘削装置によって地盤中に管体1を推進させながら該管体1の前方地盤をスクリューオーガ2によって掘削することにより、地盤中の計画線上に所定長の横孔を掘削するには、まず、管体1の上壁部1aの下面に固着したレール部材5、5に前後移動自在に装着している移動台6にチェンブロック7、7を介してスクリューオーガ2の基部を支持しているオーガ支持筒3を吊支し、この状態で管体1の後端側から移動台6を前進させてオーガ支持筒3の両側面に突設している軸体17、17が管体1の両側壁部内面に固着している軸受体18、18の直上に位置するようにスクリューオーガ2を管体1の前部内にまで移動させ、この状態でチエンブロック7、7によりオーガ支持筒3を降下させて軸体17、17を軸受体18、18に回動自在に嵌合させる。しかるのち、上下回動用ジャッキ8、8の基端面をレール部材5、5の下面に取り外し可能に固定すると共にこの固定部から下方に向かって斜め前方に傾斜させた状態でそのロッドの先端を上記オーガ支持筒3の後端面における両側部下端に連結した状態にする。   By excavating the front ground of the tubular body 1 with the screw auger 2 while propelling the tubular body 1 in the ground by the lateral hole excavating device configured in this way, a lateral hole of a predetermined length is excavated on the planned line in the ground. To do this, first, the base of the screw auger 2 is attached to the moving base 6 mounted on the rail members 5 and 5 fixed to the lower surface of the upper wall portion 1a of the tube body 1 so as to be movable back and forth via the chain blocks 7 and 7. The auger support cylinder 3 that supports the shaft is suspended, and in this state, the movable body 6 is advanced from the rear end side of the tube body 1 so as to protrude from both side surfaces of the auger support cylinder 3. The screw auger 2 is moved into the front part of the pipe body 1 so that the screw auger 2 is positioned directly above the bearing bodies 18 and 18 fixed to the inner surfaces of both side walls of the pipe body 1. The auger support cylinder 3 is lowered and the shaft bodies 17 and 17 can be freely rotated to the bearing bodies 18 and 18. It is fitted. Thereafter, the base end surfaces of the up and down pivoting jacks 8 and 8 are detachably fixed to the lower surfaces of the rail members 5 and 5, and the tip ends of the rods are inclined obliquely forward from the fixing portions downward. The auger support tube 3 is connected to the lower ends of both side portions on the rear end surface.

この状態にしてオーガ支持筒3の後部内に配設しているスクリューオーガ2の回転駆動手段4を作動させてスクリューオーガ2を回転させると共に、前後動用ジャッキ9のロッドを伸長させることによりスクリューオーガ2のカッタヘッド2aを管体1の前端開口部から前方に突出させ、さらに、突出させた状態で上記上下回動用ジャッキ8、8のロッドを伸縮させることによりオーガ支持筒3を軸体17と軸受体18との嵌合による支点部を中心として上下方向に回動させ、スクリューオーガ2のカッタヘッド2aを管体1の開口端における上下端間を上下方向に往復回動させて管体1の前方の地盤を全面的に掘削する。   In this state, the rotational drive means 4 of the screw auger 2 disposed in the rear part of the auger support cylinder 3 is operated to rotate the screw auger 2 and extend the rod of the forward / backward movement jack 9 to thereby increase the screw auger. 2 with the cutter head 2a projecting forward from the opening at the front end of the tube 1 and the rods of the above-described up-and-down pivoting jacks 8 and 8 being expanded and contracted, the auger support cylinder 3 is connected to the shaft body 17. The tube body 1 is rotated up and down around the fulcrum portion by fitting with the bearing body 18, and the cutter head 2 a of the screw auger 2 is reciprocated between the upper and lower ends of the open end of the tube body 1 in the up and down direction. Excavate the ground in front of the entire area.

このように、スクリューオーガ2のカッタヘッド2aを管体1の前端開口部から前方に突出させた状態で上下方向に回動(揺動)させることによって管体1の前方の地盤を掘削すると共に管体1をその後端面を推進手段16によって押し進めることにより推進させて横孔を掘進していく。なお、掘進時において、スクリューオーガ2のカッタヘッド2aに作用する推進反力は、上記オーガ支持筒3の軸体17とこの軸体17を嵌合させている軸受体18を介して該軸受体18を固着している管体1に受止される。   In this way, the ground in front of the tube 1 is excavated by rotating (swinging) the cutter head 2a of the screw auger 2 in the vertical direction with the cutter head 2a protruding forward from the front end opening of the tube 1. The tube body 1 is propelled by pushing the rear end face thereof by the propulsion means 16 to dig a horizontal hole. The propulsion reaction force acting on the cutter head 2a of the screw auger 2 during excavation is transmitted through the shaft body 17 of the auger support cylinder 3 and the bearing body 18 in which the shaft body 17 is fitted. 18 is received by the tube 1 to which 18 is fixed.

スクリューオーガ2のカッタヘッド2aによって掘削された土砂は、土砂収容導出樋体11の前端開口部内に取り込まれてこの樋体11内に収容されると共にスクリューオーガ2が最も下方の位置まで回動してその前部の下周部が上記土砂収容導出樋体11内に受け入れられた時に、その傾斜角度が土砂収容導出樋体11の傾斜角度と合致してスクリューオーガ2の前部が全長に亘り土砂収容導出樋体11内に沿った状態となり、従って、土砂収容導出樋体11内に収容されている掘削土砂はこのスクリューオーガ2の回転によって土砂収容導出樋体11の後端排出口まで円滑且つ確実に搬送され、該排出口から土砂排出手段12であるスクリューコンベア12b のケーシング12a の前端部内に落下する。さらに、この土砂排出手段12のケーシング12a の前端部内に落下した掘削土砂は、搬送手段16であるスクリューコンベア12b の回転によって後方に搬送され、ケーシング12a の後端下部の開口部14から土砂排出シュート15を通じて管体1の後端部一側方に排出される。   The earth and sand excavated by the cutter head 2a of the screw auger 2 is taken into the front end opening of the earth and sand containing lead-out housing 11 and accommodated in the housing 11 and the screw auger 2 rotates to the lowest position. When the lower peripheral part of the front part is received in the earth-and-sand housing / leading frame 11, the inclination angle thereof coincides with the inclination angle of the earth / sand-containing / outer frame 11 and the front part of the screw auger 2 extends over the entire length. Therefore, the excavated sediment contained in the sediment storage / reduction housing 11 is smoothly moved to the rear end discharge port of the sediment storage / reduction housing 11 by the rotation of the screw auger 2. And it is conveyed reliably and falls in the front-end part of the casing 12a of the screw conveyor 12b which is the earth and sand discharge means 12 from this discharge port. Further, the excavated earth and sand that has fallen into the front end portion of the casing 12a of the earth and sand discharging means 12 is conveyed rearward by the rotation of the screw conveyor 12b as the conveying means 16, and the earth and sand discharging chute is opened from the opening 14 at the lower rear end of the casing 12a. 15 is discharged to one side of the rear end of the tube 1.

また、横孔掘進中に、管体1の前方地盤に礫や玉石等が存在して掘進が困難となった場合には、スクリューオーガ2による前方の地盤の掘削を停止したのち、オーガ支持筒3とレール部材5、5の下面とを連結している上下回動用ジャッキ8の連結を解き、オーガ支持筒3によりスクリューオーガ2の後部を支持させた状態で、チエンブロック7、7によりオーガ支持筒3を含む掘削手段Aを上方に引き上げて軸体17を軸受体18から離脱させ、しかるのち、チェンブロック7、7を介して該オーガ支持筒3を吊支した状態で移動台6を後方に移動させることにより、スクリューオーガ2を管体1の後方に撤去し、管体1の後端開口部から作業員が該管体1の前端開口部にまで侵入して礫や玉石等の撤去作業を行ったのち、スクリューオーガ2を吊支している上記移動台6をレール部材5、5に沿って元の位置まで移動させ、チエンブロック7、7によってオーガ支持筒3を降下させてその軸体17、17を軸受体18、18に嵌合、受止させると共にオーガ支持筒3と上方のレール部材5、5間に上下回動用ジャッキ8、8を連結したのち、再び、管体1の前方地盤の掘削する。   When excavation is difficult due to the presence of gravel, cobblestone, etc. in the front ground of the tube 1 during the excavation of the side hole, after the excavation of the front ground by the screw auger 2 is stopped, the auger support tube 3 and the lower surface of the rail members 5 and 5 are uncoupled, and the auger support cylinder 3 supports the auger support by the chain blocks 7 and 7 while the rear part of the screw auger 2 is supported by the auger support cylinder 3. The excavating means A including the cylinder 3 is lifted upward to disengage the shaft body 17 from the bearing body 18, and then the movable table 6 is moved backward while the auger support cylinder 3 is suspended via the chain blocks 7, 7. The screw auger 2 is removed to the rear of the tube body 1 by moving to the front end, and an operator enters the front end opening portion of the tube body 1 from the rear end opening portion of the tube body 1 to remove gravel, cobblestones, etc. After working, screw auger 2 The above-mentioned moving platform 6 that is suspended is moved to the original position along the rail members 5 and 5, the auger support cylinder 3 is lowered by the chain blocks 7 and 7, and the shaft bodies 17 and 17 are connected to the bearing bodies 18 and 18. 18 is fitted and received and connected to the auger support cylinder 3 and the upper rail members 5, 5, and the vertical pivot jacks 8, 8 are connected, and then the front ground of the tubular body 1 is excavated again.

なお、スクリューオーガ2のカッタヘッド2aのビット等が損傷した場合においても、上記同様にしてスクリューオーガ2を管体1の後方にまで撤去し、そのビットの交換等を行ったのち、スクリューオーガ2を上記同様にして管体1内の元の位置まで移動させればよい。   Even when the bit or the like of the cutter head 2a of the screw auger 2 is damaged, the screw auger 2 is removed to the rear of the tube 1 in the same manner as described above, and the bit is exchanged. May be moved to the original position in the tube 1 in the same manner as described above.

上記のように、スクリューオーガ2の先端カッタヘッド2aによって前方の地盤を掘削しながら管体1を推進させる際に、推進手段16である推進ジャッキが伸長して該管体1がその伸長量に応じた長さだけ推進すると、一旦、スクリューオーガ2による前方地盤の掘削を中断すると共に推進ジャッキのロッドを収縮させてそのロッドと管体1の後端面間に上記伸長量に応じた厚みを有するスペーサを介在させ、しかるのち、再び、上記スクリューオーガ2による管体1の前方地盤の掘削と推進ジャッキの伸長による管体1の推進とを行い、この作業を繰り返し行っ、計画線上に一定長の横孔を掘削するものである。   As described above, when the tube body 1 is propelled while excavating the ground in front by the tip cutter head 2a of the screw auger 2, the propulsion jack as the propulsion means 16 is stretched so that the tube body 1 reaches the amount of extension. When propelled for a corresponding length, the excavation of the front ground by the screw auger 2 is temporarily interrupted, and the rod of the propulsion jack is contracted to have a thickness corresponding to the extension amount between the rod and the rear end surface of the tubular body 1. The spacer is interposed, and after that, excavation of the front ground of the pipe body 1 by the screw auger 2 and propulsion of the pipe body 1 by extension of the propulsion jack are performed again, and this operation is repeated, and a fixed length is placed on the planned line. It excavates a horizontal hole.

なお、この横孔掘削装置によって横孔を掘削しながらこの横孔内に地下構造物を推進、埋設していく場合には、該地下構造物の前面側に上記推進手段16である推進ジャッキを支持させ、この推進手段16を伸長させながら上記スクリューオーガ2を回転させて管体1の前方地盤を一定長掘進し、掘進後、スクリューオーガ2を停止させると共に推進手段16の推進ジャッキを収縮させながら地下構造物を一定長、前進させ、この作業を繰り返し行って、地下構造物を地中の所定位置に埋設すればよい。   When an underground structure is propelled and buried in the horizontal hole while excavating the horizontal hole with the horizontal hole excavator, a propulsion jack as the propulsion means 16 is attached to the front side of the underground structure. The screw auger 2 is rotated while the propulsion means 16 is extended to advance the ground in front of the tube body 1 for a fixed length. After the excavation, the screw auger 2 is stopped and the propulsion jack of the propulsion means 16 is contracted. The underground structure may be moved forward by a certain length, and this operation may be repeated to bury the underground structure at a predetermined position in the ground.

図9〜図11は上記横孔掘削装置を使用して軌道下や道路下の地盤中に断面矩形状の地下構造物20を発進立坑30側から到達立坑(図示せず)に向かって推進、埋設して該地下構造物20によって地下通路等を施工する場合を示すもので、地下構造物20は、図9に示すように、その前端開口部に刃口21を装着している。この刃口21の水平上枠部21a は、地下構造物20の厚みに相当する寸法だけその上面を地下構造物20の上面から下方に位置させてあり、この水平上枠部21a の前部上に、断面矩形状の鋼管からなり、且つ、スクリューオーガ23を回転自在に内装している角管22の後端部下面を前後摺動自在に支持させると共にこれらの角管22を複数本、図11に示すように左右方向に並列してこの角管列により、地下構造物20の上床部20a の前方地盤を掘削するように構成している。   FIGS. 9 to 11 use the horizontal hole excavator to propel the underground structure 20 having a rectangular cross section into the ground under the track or the road from the start shaft 30 toward the arrival shaft (not shown). FIG. 9 shows a case where an underground passage or the like is constructed by being buried and the underground structure 20 is constructed. As shown in FIG. 9, the underground structure 20 is provided with a blade 21 at a front end opening thereof. The horizontal upper frame portion 21a of the blade 21 has an upper surface positioned below the upper surface of the underground structure 20 by a dimension corresponding to the thickness of the underground structure 20, and is located above the front portion of the horizontal upper frame portion 21a. In addition, a bottom surface of a square tube 22 made of a steel pipe having a rectangular cross section and having a screw auger 23 rotatably mounted therein is supported slidably back and forth, and a plurality of these square tubes 22 are shown in FIG. As shown in FIG. 11, the front ground of the upper floor portion 20a of the underground structure 20 is excavated by this square tube array in parallel in the left-right direction.

さらに、この角管列の後端面と地下構造物20の上床部20a の前端面との間における刃口21の水平上枠部21a 上に左右移動台車24を地下構造物20の上床部20a の前端面に沿って往復移動可能に配設すると共に、この左右移動台車24上に角管22内のスクリューオーガ23の後端に着脱自在な回転駆動手段25をジャッキ等によって前後動自在に配設している。   Further, a left and right movable carriage 24 is placed on the horizontal upper frame portion 21a of the blade edge 21 between the rear end surface of the square tube row and the front end surface of the upper floor portion 20a of the underground structure 20 on the upper floor portion 20a of the underground structure 20. Along with the front end face, the rotary drive means 25 can be moved back and forth by a jack or the like on the left and right movable carriage 24 and detachably attached to the rear end of the screw auger 23 in the square tube 22. is doing.

また、上記全ての角管22の上面後端部から後方に向かって一定長さのテールルーフ板26を突設し、このテールルーフ板26の後端部下面を上記地下構造物20の上床部20a の前端部上面に前後摺動自在に支持させてこれらのテールルーフ板列により、上方の地盤が左右移動台車24の移動空間部内に崩落するのを阻止している。なお、角管22の後端部下面には、下方に向かって掘削土砂を排出する排出口27を開口させている。   Further, a tail roof plate 26 having a fixed length is projected from the rear end of the upper surface of all the square tubes 22 to the rear, and the lower surface of the rear end of the tail roof plate 26 is connected to the upper floor portion of the underground structure 20. These tail roof plate rows are supported slidably back and forth on the upper surface of the front end portion of 20a to prevent the upper ground from collapsing into the moving space portion of the left and right movable carriage 24. A discharge port 27 for discharging excavated earth and sand downward is opened on the lower surface of the rear end portion of the square tube 22.

上記横孔掘削装置は図10、図11に示すように、地下構造物20における両側壁部20b 、20b の前方に上下方向に複数本(図においては3本)、積層状態で配設されてこれらの横孔掘削装置により地下構造物20の両側壁部20b 、20b の前方地盤を掘削するように構成している。各横孔掘削装置の管体1の後端面と地下構造物20の両側壁部20b の前端面間には、推進ジャッキからなる上述した推進手段16が介在されていて、この推進ジャッキの後端を地下構造物20の両側壁部20b の前端面に当接した上記刃口21の外側方に突設している両側枠部21b の前面に連結、支持させ、ロッド前端を管体1の後端面に当接状態で取り付けている押当板に連結している。なお、全ての横孔掘削装置における管体1の後端部から一側方に突出している土砂排出シュート15は、地下構造物20の開口端前方における刃口21内に向けた状態となるように管体1を配列させている。 As shown in FIGS. 10 and 11, a plurality of the horizontal hole excavating devices are vertically arranged in front of the side wall portions 20b and 20b of the underground structure 20 (three in the figure) in a stacked state. These horizontal hole excavating devices are configured to excavate the front ground of both side walls 20b, 20b of the underground structure 20. The above-mentioned propulsion means 16 composed of a propulsion jack is interposed between the rear end surface of the tubular body 1 of each horizontal hole excavator and the front end surfaces of both side walls 20b of the underground structure 20, and the rear end of the propulsion jack. Is connected to and supported by the front surface of both side frame portions 21b projecting outwardly of the blade edge 21 in contact with the front end surfaces of both side wall portions 20b of the underground structure 20, and the rod front end is connected to the rear of the tube 1 It is connected to the pressing plate attached in contact with the end face. It should be noted that the earth and sand discharge chute 15 projecting to one side from the rear end portion of the tubular body 1 in all the horizontal hole excavating devices is in a state of being directed toward the blade edge 21 in front of the opening end of the underground structure 20. The tube bodies 1 are arranged in a row.

このように構成したので、発進立坑30側に設置した上記地下構造物20を到達立坑側に貫通するように推進、埋設するには、まず、地下構造物20の上床部20a の前方に並設した全ての角管22と地下構造物20の両側壁部20b 、20b の前方に配設した横孔掘削装置の全ての管体1を前方に一定長、掘進させる。この際、角管22による掘進は、刃口21の水平上枠部21a 上に配設している左右移動台車24を所定の角管22の後端面にまで移動させて該台車上に設けている回転駆動手段25をこの角管22内のスクリューオーガ23の後端に連結させ、回転駆動手段25を作動させながら前進させて、スクリューオーガ23により前方の地盤の掘削しながら角管22を推進させることにより行われる。この角管22による一定長の掘進後、次の角管22の後方に上記左右移動台車24を移動させて上記同様にこの角管22を一定長掘進させ、この作業を全ての角管22に行って角管列を一定長、掘進させる。   Since it is configured in this way, in order to propel and bury the underground structure 20 installed on the start shaft 30 side so as to penetrate the reaching shaft side, first, it is arranged in parallel in front of the upper floor portion 20a of the underground structure 20 All the tubular bodies 1 of the horizontal hole excavating device arranged in front of all the square tubes 22 and both side walls 20b, 20b of the underground structure 20 are dug forward by a certain length. At this time, the excavation by the square tube 22 is performed by moving the left and right movable carriage 24 arranged on the horizontal upper frame portion 21a of the blade 21 to the rear end surface of the predetermined square pipe 22 and providing it on the carriage. The rotary drive means 25 is connected to the rear end of the screw auger 23 in the square tube 22, and the rotary drive means 25 is moved forward to advance the square pipe 22 while excavating the ground in front by the screw auger 23. Is done. After excavating the square tube 22 for a certain length, the left and right movable carriage 24 is moved to the rear of the next square tube 22 and the square tube 22 is excavated for a certain length in the same manner as described above. Go and excavate the tube column for a certain length.

一方、地下構造物20の両側壁部20b 、20b の前方に配設した横孔掘削装置を構成している断面縦長矩形状の管体1を掘進させるには、全ての管体1内に配設しているスクリューオーガ2を上述したように上下方向に回動させて管体1の前方地盤を掘削すると共に推進手段16である推進ジャッキを伸長させることにより、管体1を上記角管22と同じ長さだけ掘進させる。この場合、上記横方向に並列している角管22においては、刃口21の水平上枠部21a 上を利用して左右移動台車24を配設することができるので、角管22にはスクリューオーガ23の回転駆動手段を設ける必要はないが、上下方向に配列している上記管体1の場合には、スクリューオーガ2の回転駆動手段を備えた移動台車を上下方向に移動可能に設ける空間等を設けることが困難であるために、上述したように、全ての管体1内にスクリューオーガ2の回転駆動手段4を設けると共に、スクリューオーガ2を上下方向に回動自在にして少ない管体1の本数で地下構造物20の両側壁部20b 、20b の前方地盤を全面的に掘削可能に構成しているものである。   On the other hand, in order to dig up the vertically long rectangular pipe body 1 constituting the horizontal hole excavating apparatus disposed in front of the both side walls 20b, 20b of the underground structure 20, it is arranged in all the pipe bodies 1. As described above, the screw auger 2 is rotated up and down to excavate the front ground of the tube body 1 and the propulsion jack as the propulsion means 16 is extended to thereby extend the tube body 1 to the square tube 22. The same length as that. In this case, since the left and right movable carriage 24 can be disposed on the horizontal upper frame portion 21a of the blade 21 in the square tubes 22 arranged in parallel in the lateral direction, It is not necessary to provide a rotation driving means for the auger 23. However, in the case of the tubes 1 arranged in the vertical direction, a space provided with a movable carriage provided with the rotation driving means for the screw auger 2 so as to be movable in the vertical direction. Since it is difficult to provide a screw auger 2 in all the pipes 1 as described above, the screw auger 2 can be rotated in the vertical direction to reduce the number of pipes. The front ground of the both side walls 20b, 20b of the underground structure 20 is configured to be fully excavable with the number of one.

上記角管22内のスクリューオーガ23によって掘削された土砂は、各角管22の後端部下面に開設している排出口27から刃口21内に落下し、同様に管体1内のスクリューオーガ2によって掘削された土砂は、上述したように管体1の後端部一側面に設けている土砂排出シュート15を通じて同じく刃口21内に排出され、これらの掘削土砂は刃口21の前方地盤の掘削土砂と共に地下構造物20内を通じて発進立坑30側に排除される。   The earth and sand excavated by the screw auger 23 in the square tube 22 falls into the blade edge 21 from the discharge port 27 opened on the lower surface of the rear end portion of each square tube 22, and similarly the screw in the tube 1 The earth and sand excavated by the auger 2 are discharged into the blade edge 21 through the earth and sand discharge chute 15 provided on one side surface of the rear end portion of the pipe body 1 as described above. The ground excavated earth and sand are removed to the start shaft 30 side through the underground structure 20.

全ての管体1と角管22とを上述したように一定長、地中に推進させたのち、地下構造物20の後端面と発進立坑30の後壁面間に介在させている複数本の地下構造物推進ジャッキ伸長させることにより、地下構造物20の前端面に装着した刃口21によって前方の地盤を掘削しながら上記管体1と角管22の掘進長に等しい長さだけ地下構造物20を地中に推進させる。この時、管体1の推進手段16である推進ジャッキを地下構造物20の推進に従って収縮させる。 After pushing all the pipes 1 and the square pipes 22 into the ground for a certain length as described above, a plurality of underground pipes interposed between the rear end face of the underground structure 20 and the rear wall face of the starting shaft 30 By extending the structure propulsion jack, the underground structure is excavated by the cutting edge 21 attached to the front end surface of the underground structure 20 by a length equal to the digging length of the tubular body 1 and the square tube 22 while excavating the front ground. Promote 20 underground. At this time, the propulsion jack which is the propulsion means 16 of the pipe body 1 is contracted according to the propulsion of the underground structure 20.

次いで、再び、上記同様にして管体1と角管列とを一定長、掘進させる作業と、この作業後に地下構造物20を同一長さだけ推進させる作業を行い、これを繰り返すことによって地下構造物20の前端部を到達立坑内に連通させて地下道を築造するものである。到達立坑側に達した上記横孔掘削装置や角管22等は撤去、回収して次の地下構造物の埋設に使用する。なお、地下構造物20によって築造すべき地下道の長さが長い場合には、地下道の長さを複数分割した長さを有する地下構造物を順次、継ぎ足すように接続させながら推進、埋設させればよい。本発明は、上記したように、縦長断面形状の掘削に好適に用いられるものであるが、これに限らず、正方形断面等、各種矩形断面への適用が可能である。また、掘削手段Aは、掘削する断面形状に応じて、単一ではなく左右または上下に複数個設けるように構成しておいてもよいし、スクリューオーガ2を左右方向に回動する機構を付加する構成としてもよい。   Next, again, in the same manner as described above, the work for excavating the tube body 1 and the square tube row by a fixed length and the work for propelling the underground structure 20 by the same length after this work are performed, and the underground structure is repeated by repeating this operation. The underpass is constructed by connecting the front end of the object 20 to the reach shaft. The horizontal hole excavator and the square tube 22 etc. that have reached the reach shaft side are removed, recovered, and used for burying the next underground structure. In addition, when the length of the underground passage to be built by the underground structure 20 is long, the underground structure having a length obtained by dividing the length of the underground passage may be propelled and embedded while sequentially connecting the underground structures. That's fine. As described above, the present invention is suitably used for excavation of a vertically long cross-sectional shape, but is not limited thereto, and can be applied to various rectangular cross sections such as a square cross section. Further, the excavating means A may be configured not to be single but to be provided in the left and right or up and down depending on the cross-sectional shape to be excavated, and a mechanism for rotating the screw auger 2 in the left and right direction is added. It is good also as composition to do.

横孔掘削装置の要部の縦断側面図。The vertical side view of the principal part of a horizontal hole excavation apparatus. その簡略正面図。The simplified front view. 図1におけるA−A線を断面した背面図。The rear view which cut the AA line in FIG. 図1におけるB−B線を断面した背面図。The rear view which cut the BB line in FIG. オーガ支持筒の回動支点部分の構造を示す縦断正面図。The longitudinal cross-sectional front view which shows the structure of the rotation fulcrum part of an auger support cylinder. その軸受体の簡略側面図。The simplified side view of the bearing body. 横孔掘削装置の簡略縦断側面図。The simplified longitudinal section side view of a horizontal hole excavator. その土砂排出シュート部分の簡略縦断面図。The simplified longitudinal cross-sectional view of the earth and sand discharge chute part. 地下構造物の推進、埋設施工状態を示す簡略縦断側面図。The simplified vertical side view showing the state of the underground structure propulsion and burial construction. 横孔掘削装置を配設した部分の簡略縦断側面図。The simplified vertical side view of the part which arrange | positioned the horizontal hole excavation apparatus. 全体の簡略正面図。The whole simplified front view.

1 管体
2 スクリューオーガ
3 オーガ支持筒
4 回転駆動手段
5 レール部材
6 移動台
7 チェンブロック
8 上下回動用ジャッキ
9 前後動用ジャッキ
11 土砂収容導出樋体
12 土砂排出手段
15 土砂排出シュート
16 推進手段
17 軸体
18 軸受体
DESCRIPTION OF SYMBOLS 1 Tube 2 Screw auger 3 Auger support cylinder 4 Rotation drive means 5 Rail member 6 Moving stand 7 Chain block 8 Jack for vertical rotation 9 Jack for forward / backward movement
11 Sediment containment enclosure
12 Sediment discharge means
15 Sediment discharge chute
16 Propulsion means
17 shaft
18 Bearing body

Claims (5)

推進手段によって前方に押し進められる矩形断面の管体内にオーガ支持筒を前後方向に移動可能に且つ昇降可能に吊支すると共にこのオーガ支持筒内に上記管体の前方地盤を掘削するスクリューオーガの基部を挿入してオーガ支持筒の後端部内に配設している回転駆動手段に連結してあり、さらに、オーガ支持筒の両側面に軸体を突設してこの軸体を管体の両側壁部内面に固着している軸受体に上下方向に着脱自在に且つ回動自在に嵌合、支持させていると共に、上記軸体を軸受体から離脱させてオーガ支持筒をスクリューオーガと一体的に後方側に撤去可能に構成していることを特徴とする横孔掘削装置。 A base portion of a screw auger that suspends an auger support cylinder so as to be movable in the front-rear direction and is movable up and down in a rectangular cross-section tube pushed forward by propulsion means, and excavates the front ground of the tube body in the auger support cylinder Is inserted into the rear end of the auger support tube and connected to the rotational drive means. Further, a shaft body is provided on both side surfaces of the auger support tube so that the shaft body is connected to both sides of the tube body. The bearing body fixed to the inner surface of the wall portion is detachably fitted and supported in a vertically movable manner, and the auger support cylinder is integrated with the screw auger by removing the shaft body from the bearing body. transverse bore drilling apparatus characterized by being removed can configure the rear side. 管体内にオーガ支持筒を前後方向に移動可能に吊支すると共にこのオーガ支持筒内にスクリューオーガの基部を挿入してオーガ支持筒の後端部内に配設している回転駆動手段に連結し、さらに、オーガ支持筒にこの回転駆動手段を前後動させて上記スクリューオーガの先端カッタヘッドを管体の前端開口部から出没させる前後動用ジャッキを装着すると共に、オーガ支持筒と管体の上壁部内面間にスクリューオーガの上下回動用ジャッキを着脱自在に配設していることを特徴とする請求項1に記載の横孔掘削装置。 An auger support tube is suspended in the tube so as to be movable in the front-rear direction, and a base portion of a screw auger is inserted into the auger support tube and connected to a rotation driving means disposed in a rear end portion of the auger support tube. The auger support cylinder is further provided with a forward / backward movement jack for moving the rotary drive means back and forth so that the tip cutter head of the screw auger protrudes and retracts from the front end opening of the pipe body, and the auger support cylinder and the upper wall of the pipe body. The horizontal hole excavation device according to claim 1, wherein a jack for vertically rotating the screw auger is detachably disposed between the inner surfaces of the parts. 管体の断面は縦長矩形状であり、スクリューオーガによる掘削径を管体の縦長矩形断面の横幅に略等しい径に形成していると共に、管体内の前端部内底面上にオーガ支持筒から突出しているスクリューオーガの前部を受け入れ可能な土砂収容導出樋体を前端から後端に向かって斜め上方に傾斜させた状態で配設してあり、さらに、この土砂収容導出樋体の後端導出口の下方から管体の後端に向かって土砂排出手段を配設していることを特徴とする請求項1又は請求項2に記載の横孔掘削装置。 The cross section of the tubular body is a vertically long rectangular shape, and the excavating diameter by the screw auger is formed to have a diameter substantially equal to the horizontal width of the vertically long rectangular cross section of the tubular body, and protrudes from the auger support tube on the inner bottom surface of the front end portion of the tubular body. The earth-and-sand housing / leading housing that can accept the front part of the screw auger is disposed in a state inclined obliquely upward from the front end toward the rear end, and the rear-end outlet of the earth-and-sand housing / leading housing The horizontal hole excavation device according to claim 1 or 2 , wherein earth and sand discharging means are disposed from below the rear end of the pipe body. 管体の前端開口部における両側壁部の前端面をスクリューオーガのカッタヘッドの上下回動軌跡に沿う凸円弧状前端面に形成していること特徴とする請求項1、請求項2又は請求項3に記載の横孔掘削装置。 Claim 1, claim 2 or claim, characterized by forming the front end surface of the side wall portions of the front end opening of the tubular body into convex arcuate front end face along the vertical rotational path of the cutter head of the screw auger The horizontal hole excavator according to claim 3 . 土砂排出手段をスクリューコンベアから構成し、このスクリューコンベアの搬送終端部に、管体の後端部における一側下部に配設している土砂排出シュートの上端部を連通させ、この土砂排出シュートの排出口を管体の一側下部から外部に突出させて土砂を管体外部に排出するように構成していることを特徴とする請求項1乃至請求項4のうちいずれか1項に記載の横孔掘削装置。 The earth and sand discharge means is composed of a screw conveyor, and the upper end of the earth and sand discharge chute arranged at one lower part at the rear end of the pipe is communicated with the conveying end of the screw conveyor. 5. The structure according to claim 1, wherein the discharge port is configured to project outward from a lower portion of one side of the pipe body to discharge earth and sand to the outside of the pipe body. Horizontal hole drilling rig.
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