JPH09242460A - Shaft constructing device - Google Patents
Shaft constructing deviceInfo
- Publication number
- JPH09242460A JPH09242460A JP8085867A JP8586796A JPH09242460A JP H09242460 A JPH09242460 A JP H09242460A JP 8085867 A JP8085867 A JP 8085867A JP 8586796 A JP8586796 A JP 8586796A JP H09242460 A JPH09242460 A JP H09242460A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- shaft
- tubular body
- expanding
- expanding mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 98
- 238000010276 construction Methods 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000011440 grout Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 56
- 239000010959 steel Substances 0.000 abstract description 56
- 239000004570 mortar (masonry) Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/16—Machines for digging other holes in the soil
- E02F5/20—Machines for digging other holes in the soil for vertical holes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水道工事の推進
用立坑、ポンプマンホール、地下水槽、地下油タンク、
地下室、電柱などの基礎立坑を構築するための立坑構築
装置に関する。TECHNICAL FIELD The present invention relates to a shaft for promoting sewerage construction, a pump manhole, an underground water tank, an underground oil tank,
The present invention relates to a vertical shaft building device for building a basic vertical shaft such as a basement and a utility pole.
【０００２】[0002]
【従来の技術】地中立坑の構築方法の一つとして、従来
より素堀り立坑の内面に枠付の曲面波状鋼板のセグメン
トをボルト、ナットで結合して作業空間を形成するいわ
ゆるライナープレート工法が採用されている。このライ
ナープレート工法は立坑が浅い場合には特に問題はない
が、立坑が深くなると地下水の噴出、周壁の崩壊、有毒
ガスの発生などが多くなるため、作業時の危険性が極め
て大きい。2. Description of the Related Art As one of the methods for constructing an underground shaft, a so-called liner plate construction method has been conventionally used in which a curved corrugated steel plate segment with a frame is joined to the inner surface of a bare shaft by bolts and nuts to form a working space. Has been adopted. This liner plate method does not pose any particular problem when the vertical shaft is shallow, but when the vertical shaft is deep, groundwater spouting, collapse of the peripheral wall, generation of toxic gas, etc. increase, and therefore the danger during operation is extremely great.
【０００３】これに対処するため、断面が円形の厚肉鋼
管を地中に揺動圧入し、その内部をバケットで掘削して
立坑を構築する、いわゆるケコム工法やベノト工法と呼
ばれる工法も採用されている。これらの工法は、ライナ
ープレート工法の危険性を改善し、掘削能力を画期的に
向上するものとして歓迎されているが、地中内に厚肉鋼
管を埋設してしまうため工事費が増大する。In order to deal with this, a so-called Kecom construction method or a benot construction method is adopted in which a thick steel pipe having a circular cross section is rock-fitted into the ground and the interior is excavated by a bucket to construct a vertical shaft. ing. These construction methods are welcomed as improving the danger of the liner plate construction method and remarkably improving the excavation capacity, but the construction cost increases because the thick steel pipe is buried in the ground. .
【０００４】そこで、本件出願人は、これらの工法の問
題点を解消するため、立坑のライナープレート施工法及
びライナープレート施工装置に関する特許出願を行い、
その内容が特開平２−２２１５８６号公報などに開示さ
れている。In order to solve the problems of these construction methods, the applicant of the present application filed a patent application concerning a shaft liner plate construction method and a liner plate construction apparatus,
The contents thereof are disclosed in Japanese Patent Laid-Open No. 2-221586.
【０００５】この工法は、鋼製円筒状の掘削ケーシング
および内筒からなるダブルケーシングを、内堀りと併行
して地中に押し込んで所定の深さに埋設した後、ダブル
ケーシング内部にローラ加工装置を挿入して前記ケーシ
ング下部に固定し、掘削ケーシングを地上へ引き上げな
がら、このローラ加工装置の回転押圧力によって、内筒
を下部より上部へと順次波形状に成形するものである。According to this method, a double casing consisting of a steel cylindrical excavating casing and an inner cylinder is pushed into the ground in parallel with the inner digging and buried at a predetermined depth, and then a roller processing device is placed inside the double casing. Is fixed to the lower part of the casing, and the excavating casing is pulled up to the ground, and the inner cylinder is sequentially formed in a corrugated shape from the lower part to the upper part by the rotational pressing force of the roller processing device.
【０００６】このような工法および装置を採用し、地中
に埋設したダブルケーシングの内筒をその下端部から順
次波形状にプレス加工していくことにより、いわゆるコ
ルゲート状とすることができる。コルゲート化により強
度の向上が図られるため、外圧に対しても立坑の変形を
防止することが可能となる。したがって、内筒は薄肉鋼
管であっても十分な強度を得ることができ、厚肉鋼管を
使用する必要がなくなるため、工事費を大幅に低減する
ことができる。By adopting such a construction method and apparatus and sequentially pressing the inner casing of the double casing buried in the ground from its lower end into a corrugated shape, a so-called corrugated shape can be obtained. Since the corrugation improves strength, it is possible to prevent the vertical shaft from being deformed against external pressure. Therefore, even if the inner cylinder is a thin-walled steel pipe, sufficient strength can be obtained, and since it is not necessary to use a thick-walled steel pipe, the construction cost can be significantly reduced.
【０００７】[0007]
【発明が解決しようとする課題】特開平２−２２１５８
６号公報に開示されている工法においては、ローラ加工
装置に備えた複数のローラを内筒の内面に押し当て、こ
れらのローラを内筒の半径方向に移動させるとともに円
周方向に回転させる動作が必要である。このため、ロー
ラ加工装置の構造が複雑となるほか、複数のローラによ
り加圧点の位置が変動するため波形の深さが一定しない
ことがある。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the method disclosed in Japanese Patent Publication No. 6, a plurality of rollers provided in a roller processing device are pressed against the inner surface of the inner cylinder, and these rollers are moved in the radial direction of the inner cylinder and rotated in the circumferential direction. is necessary. For this reason, the structure of the roller processing device becomes complicated, and the depth of the waveform may not be constant because the position of the pressing point varies due to the plurality of rollers.
【０００８】また、内筒が薄いため、ローラに関する条
件、例えば、軸受の固着、内筒とローラの摩擦、地山と
内筒の摩擦などによって内筒がよじれるおそれもある。Further, since the inner cylinder is thin, there is a possibility that the inner cylinder may be twisted due to conditions relating to the rollers, for example, fixing of bearings, friction between the inner cylinder and the roller, friction between the ground and the inner cylinder, and the like.
【０００９】さらに、ローラの回転速度、膨出速度によ
っては成形に長時間を要することがあり、しかも加工完
了の時期を把握することが困難である。Further, it may take a long time for molding depending on the rotation speed and the swelling speed of the roller, and it is difficult to know when the processing is completed.
【００１０】一方、前記工法においては、ローラ加工装
置を地上に設置した立坑掘削機のワイヤで吊り下げる構
造であるため、内筒を波形に加工する場合には掘削装置
のクレーン部分を上方へ移動するかワイヤを巻き上げる
などの方法により、ローラ加工装置を内筒の軸線方向に
一定距離ずつ上昇させていくことが必要である。このた
め、ローラ加工装置の位置調整が非常に煩雑となるだけ
でなく、内筒の波形部分の形状も不均一となり、立坑の
強度低下を招くおそれがある。On the other hand, in the above-mentioned construction method, since the roller machining device is hung by the wire of the shaft excavator installed on the ground, when the inner cylinder is machined into a corrugated form, the crane part of the excavator is moved upward. It is necessary to raise the roller processing device by a constant distance in the axial direction of the inner cylinder by a method such as winding up a wire. Therefore, not only the position adjustment of the roller processing device becomes very complicated, but also the shape of the corrugated portion of the inner cylinder becomes non-uniform, which may lead to a decrease in the strength of the vertical shaft.
【００１１】そこで、本発明が解決しようとする課題
は、比較的容易な操作で高強度の立坑を構築することが
でき、作業時の安全性にも優れた立坑構築装置を提供す
ることにある。Therefore, an object of the present invention is to provide a shaft constructing device which can construct a shaft having high strength by relatively easy operation and which is excellent in safety during work. .
【００１２】[0012]
【課題を解決するための手段】前記課題を解決するた
め、本発明の立坑構築装置は、地中に立設した管状体内
に装入され放射方向に拡縮可能な拡管手段と、拡管手段
を管状体の軸線方向に移動させる移動手段とを備えたこ
とを特徴とする。拡管手段で管状体を拡管する動作と、
移動手段で拡管手段を軸線方向に移動させる動作とを交
互に反復することにより管状体を波形に成形する。すな
わち、地中に立設した管状体を波形に成形すれば、単な
る管状体に比べて強度が大幅に向上するため、高強度の
立坑を構築することができる。In order to solve the above-mentioned problems, a vertical shaft constructing device of the present invention comprises a pipe expanding means which is inserted into a tubular body standing upright in the ground and which can be expanded and contracted in a radial direction. And a moving means for moving the body in the axial direction. The operation of expanding the tubular body with the expanding means,
The tubular body is formed into a corrugated shape by alternately repeating the operation of moving the tube expanding means in the axial direction by the moving means. That is, if a tubular body that is erected in the ground is formed into a corrugated shape, the strength is significantly improved as compared with a simple tubular body, so that a high-strength shaft can be constructed.
【００１３】まず、収縮状態にした拡管手段を管状体内
に装入した後、拡管手段を放射方向に伸展させることに
より管状体を放射方向に変形させて拡管を行う。所定寸
法まで拡管させたら拡管手段を収縮状態にし、移動手段
により管状体の軸線方向に移動させる。そして、再び拡
管手段を放射方向に伸展させることにより管状体を拡管
する。このように、拡管手段で管状体を拡管する動作
と、移動手段で拡管手段を移動させる動作とを交互に反
復することにより、地中に立設した管状体を波形に成形
していく。First, after inserting the contracted tube expanding means into the tubular body, the tube body is radially deformed by expanding the tube expanding means in the radial direction to expand the tube. When the tube is expanded to a predetermined size, the tube expanding means is contracted, and the moving means moves the tube in the axial direction. Then, the tubular body is expanded by extending the expanding means again in the radial direction. In this way, the operation of expanding the tubular body by the expanding means and the operation of moving the expanding means by the moving means are alternately repeated to form the tubular body standing in the ground into a corrugated shape.
【００１４】このように、拡管手段を放射方向に伸展さ
せることにより管状体を拡管するため、波形部分が管状
体と同心円をなすように拡管することができるだけでな
く、連続した一定形状の波形に成形することができる。As described above, since the tubular body is expanded by extending the expanding means in the radial direction, not only the corrugated portion can be expanded so as to form a concentric circle with the tubular body, but also a continuous constant-shaped waveform can be obtained. It can be molded.
【００１５】また、本発明の立坑構築装置は、前記拡管
手段が、管状体内面に沿うように略円形状に配列されか
つ管状体の放射方向に拡縮可能な押し型を有する上部拡
管機構および下部拡管機構で構成され、さらに移動手段
が上部拡管機構と下部拡管機構との間隔を軸線方向に変
化させる伸縮機構であることを特徴とする。Further, in the vertical shaft constructing apparatus of the present invention, the pipe expanding means is arranged in a substantially circular shape along the inner surface of the tubular body, and has an upper pipe expanding mechanism and a lower part having a push die capable of expanding and contracting in the radial direction of the tubular body. It is characterized in that it is constituted by a pipe expanding mechanism, and the moving means is an expanding / contracting mechanism that changes the interval between the upper pipe expanding mechanism and the lower pipe expanding mechanism in the axial direction.
【００１６】すなわち、管状体内に装入される拡管手段
は上部拡管機構および下部拡管機構の２台で構成され、
それぞれ管状体内面に沿うように略円形状に配列されか
つ管状体の放射方向に拡縮可能な押し型を有している。
そして、上部拡管機構および下部拡管機構で管状体を拡
管する動作と、伸縮機構で上部拡管機構と下部拡管機構
との間隔を軸線方向に変化させる動作とを交互に反復す
ることにより管状体を波形に成形していく。That is, the tube expanding means to be loaded into the tubular body is composed of two units, an upper tube expanding mechanism and a lower tube expanding mechanism,
Each has a pressing die which is arranged in a substantially circular shape along the inner surface of the tubular body and is expandable and contractable in the radial direction of the tubular body.
Then, the tubular body is corrugated by alternately repeating the operation of expanding the tubular body by the upper pipe expanding mechanism and the lower pipe expanding mechanism and the operation of changing the distance between the upper pipe expanding mechanism and the lower pipe expanding mechanism in the axial direction by the telescopic mechanism. Mold into.
【００１７】ここで、本発明の立坑構築装置により管状
体に波形を形成する工程について説明する。まず、押し
型を全て収縮状態にした拡管手段を、地中に立設した管
状体内に装入した後、下部拡管機構の押し型を放射方向
に伸展させることにより管状体を放射方向に拡管した
後、上部拡管機構の押し型を放射方向に伸展させること
により管状体を放射方向に拡管する。このとき、拡管手
段は上部拡管機構および下部拡管機構からなるため、管
状体には上下２つの波形が形成される。また、各々の拡
管機構が有する押し型は管状体内面に沿うように略円形
状に配列されているため、波形部分が管状体と同心円を
なすように拡管できるだけでなく、波形を連続した一定
形状とすることができる。Here, the step of forming the corrugation on the tubular body by the vertical shaft building apparatus of the present invention will be described. First, after inserting the tube expanding means in which all the pressing dies are in a contracted state into the tubular body standing in the ground, the tubular body is expanded in the radial direction by extending the pressing die of the lower tube expanding mechanism in the radial direction. Then, the tubular body is expanded in the radial direction by extending the pressing die of the upper tube expansion mechanism in the radial direction. At this time, since the tube expanding means is composed of the upper tube expanding mechanism and the lower tube expanding mechanism, two upper and lower corrugations are formed on the tubular body. Further, since the pressing die of each tube expanding mechanism is arranged in a substantially circular shape along the inner surface of the tubular body, not only the corrugated part can be expanded so as to form a concentric circle with the tubular body, but also the corrugated shape has a constant shape. Can be
【００１８】次に、上部拡管機構の押し型を収縮状態に
した後、伸縮機構を伸展させることにより上部拡管機構
のみを軸線方向に所定距離だけ上昇させ、再び上部拡管
機構の押し型のみを放射方向に伸展させることにより管
状体を拡管する。このとき、下部拡管機構の押し型は管
状体の波形部分に当接した状態を保つことにより、装置
が落下したりズレたりしないように保持する役目を果た
している。Next, after the pressing die of the upper pipe expanding mechanism is contracted, the expanding and contracting mechanism is extended to raise only the upper pipe expanding mechanism by a predetermined distance in the axial direction, and only the pressing die of the upper pipe expanding mechanism is radiated again. The tubular body is expanded by extending it in the direction. At this time, the pressing die of the lower tube expanding mechanism maintains a state of contacting the corrugated portion of the tubular body, thereby playing a role of holding the device so as not to drop or slip.
【００１９】この後、下部拡管機構の押し型を収縮状態
にした後、伸縮機構を収縮させることにより下部拡管機
構のみを管状体の軸線方向に所定距離だけ上昇させ、先
ほど上部拡管機構が形成した波形部分と同じ高さに位置
させる。そして、再び下部拡管機構の押し型を放射方向
に伸展させることにより、先ほど上部拡管機構が形成し
た波形部分に当接させ、波形部分の形状を整える。この
とき、上部拡管機構の押し型は管状体の波形部分に当接
した状態を保ち、装置が落下しないように保持する役目
を果たしている。After that, after the pressing die of the lower tube expanding mechanism is contracted, the expanding and contracting mechanism is contracted to raise only the lower tube expanding mechanism in the axial direction of the tubular body by a predetermined distance to form the upper tube expanding mechanism. Position it at the same height as the corrugated part. Then, the pressing die of the lower tube expanding mechanism is again extended in the radial direction so that it is brought into contact with the corrugated portion formed by the upper tube expanding mechanism and the shape of the corrugated portion is adjusted. At this time, the pressing die of the upper tube expanding mechanism keeps contacting with the corrugated portion of the tubular body and plays a role of holding the device so as not to drop.
【００２０】さらに、この後、上部拡管機構の押し型を
収縮状態にした後、伸縮機構を伸展させることにより上
部拡管機構のみを管状体の軸線方向に所定距離だけ上昇
させ、再び上部拡管機構の押し型を放射方向に伸展させ
ることにより管状体を拡管する。以下、これら一連の動
作を繰り返すことにより、管状体を下部から上部に向か
って順次波形に成形していく。Further, after that, the pressing die of the upper tube expanding mechanism is brought into a contracted state, and then the expanding and contracting mechanism is extended to raise only the upper tube expanding mechanism by a predetermined distance in the axial direction of the tubular body, and the upper tube expanding mechanism is again opened. The tubular body is expanded by extending the pressing die in the radial direction. After that, by repeating these series of operations, the tubular body is sequentially formed into a corrugated shape from the lower part to the upper part.
【００２１】すなわち、上部拡管機構および下部拡管機
構で管状体を拡管する動作と、伸縮機構で２台の拡管機
構の間隔を伸縮させる動作とを交互に反復することによ
り、管状体内に装入した立坑構築装置は尺取り虫状に上
昇していきながら管状体を波形に成形していく。なお、
ここでは上部拡管機構および下部拡管機構で構成される
拡管手段について説明したが、３台以上の拡管機構を設
けた場合も前記と同様に動作させることにより管状体を
波形に成形していくことが可能である。That is, the operation of expanding the tubular body by the upper expanding mechanism and the lower expanding mechanism and the operation of expanding and contracting the interval between the two expanding mechanisms by the expanding and contracting mechanism are alternately repeated to load the tubular body. The vertical shaft building device forms a tubular body into a corrugated shape while climbing up like a scale. In addition,
Here, the pipe expanding means composed of the upper pipe expanding mechanism and the lower pipe expanding mechanism has been described, but when three or more pipe expanding mechanisms are provided, the tubular body can be formed into a corrugated shape by operating in the same manner as described above. It is possible.
【００２２】一方、本発明の立坑構築装置では地中に立
設された管状体が互いに摺動可能な外管および内管から
なる二重構造であることを特徴とする。まず外管による
立坑掘削を行った後この外管の内部に内管を挿入し、外
管のみを徐々に引き上げながら内管の下部から順次波形
に成形していき、最終的には波形の内管のみを埋設した
状態にして立坑を構築する。On the other hand, the vertical shaft building apparatus of the present invention is characterized in that the tubular body erected in the ground has a double structure composed of an outer pipe and an inner pipe which are slidable with respect to each other. First, after performing vertical shaft excavation with an outer pipe, insert an inner pipe into this outer pipe and gradually raise only the outer pipe to form a corrugated shape from the lower part of the inner pipe until the inner part of the corrugated Construct a shaft with only the pipe buried.
【００２３】また、前記内管の下端部に底盤を取り付
け、底盤に逆止弁を有する注水孔およびグラウト注入孔
を設けたことを特徴とする。内管の下端部に底盤を取り
付けることにより強度を高めるとともに、内管を外管内
部へ挿入する際の下端部の変形を防止する。さらに、立
坑底部へのコンクリート打設および養生の手間を省き、
立坑の水密性を向上させる。地中に立設した外管内部
へ、底盤を取り付けた内管を挿入する際、外管内に水が
存在する場合には、水の浮力により内管の沈降が妨げら
れるため、逆止弁を有する注水孔を備えることにより、
注水孔を通して内管内部へ水を浸入させ内管の沈降を促
進する。A bottom plate is attached to the lower end of the inner pipe, and a water injection hole having a check valve and a grout injection hole are provided in the bottom plate. The bottom plate is attached to the lower end of the inner pipe to increase the strength and prevent the lower end from being deformed when the inner pipe is inserted into the outer pipe. In addition, the work of placing concrete on the bottom of the shaft and curing it is saved,
Improve the water tightness of the shaft. When inserting the inner pipe with the bottom plate inside the outer pipe erected in the ground, if there is water in the outer pipe, the buoyancy of water will prevent the inner pipe from settling down. By having a water injection hole that has,
Water is introduced into the inner pipe through the water injection hole to promote sedimentation of the inner pipe.
【００２４】なお、注水孔は、内管を沈降させる間は開
放状態を保ち、最終的には閉止する必要があるため、逆
止弁を閉止方向へ付勢した構造とし、外管内への挿入開
始前に水溶性の固形物を逆止弁と弁座との間に挟持させ
ておけば、沈降中は開放状態を保ち、沈降後はこの固形
物が溶解、消失することにより逆止弁を自動的に閉止す
ることができる。Since the water injection hole needs to be kept open while the inner pipe is settled and finally closed, the check valve is structured so as to be urged in the closing direction and inserted into the outer pipe. If a water-soluble solid substance is sandwiched between the check valve and the valve seat before starting, the open state will be maintained during sedimentation, and after the sedimentation, this solid substance will dissolve and disappear, thereby opening the check valve. It can be closed automatically.
【００２５】さらに、底盤にグラウト注入孔を設けるこ
とにより、地上から底盤の下方へのモルタル注入などを
容易に行うことができ、またグラウト注入孔に逆止弁を
設けることにより硬化前のモルタルなどが逆流すること
を防止できる。Furthermore, by providing a grout injection hole in the bottom plate, it is possible to easily inject mortar from above the ground to the bottom of the bottom plate, and by providing a check valve in the grout injection hole, mortar before hardening, etc. Can be prevented from flowing backwards.
【００２６】さらに、前記底盤のグラウト注入孔に、長
手方向の貫通孔を有する軸体を立設したことを特徴とす
る。底盤のグラウト注入孔に軸体を立設することによ
り、立坑構築装置の支持部材とすることができ、また、
軸体の貫通孔内を通して地上から底盤下方へのモルタル
注入を容易に行うことができる。Furthermore, a shaft body having a through hole in the longitudinal direction is provided upright in the grout injection hole of the bottom plate. By arranging the shaft body in the grout injection hole of the bottom plate, it can be used as a support member for the shaft construction device, and
The mortar can be easily injected from the ground to the bottom of the bottom through the through hole of the shaft.
【００２７】また、本発明の立坑構築装置では、拡管手
段の上部に長手方向の貫通孔を有する軸体を立設すると
ともに貫通孔を拡管手段の下部まで貫通させ、さらに軸
体の上方に略水平の支持バー材を取り付けたことを特徴
とする。略水平の支持バー材を有する軸体を拡管手段の
上部に立設することにより、立坑構築装置の支持部材と
することができる。また、軸体の長手方向から体拡管手
段の下部まで貫通する貫通孔を設けることにより、貫通
孔内を通して地上から底盤下方へのモルタル注入などを
容易に行うことができる。Further, in the shaft constructing device of the present invention, a shaft body having a longitudinal through hole is erected on the upper part of the pipe expanding means, the through hole is made to penetrate to the lower part of the pipe expanding means, and further above the shaft body. It is characterized by installing a horizontal support bar material. A shaft member having a substantially horizontal support bar member is erected on the upper portion of the pipe expanding means, so that the shaft member can be used as a support member for the shaft construction device. Further, by providing the through hole penetrating from the longitudinal direction of the shaft body to the lower portion of the body expanding means, it is possible to easily perform mortar injection from the ground to the bottom of the bottom plate through the through hole.
【００２８】[0028]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は地中に厚肉鋼管を圧入し立
坑掘削機で立坑を掘削した状態を示す垂直断面図、図２
は図１の立坑にセンターポール付きの底盤を取付けた薄
肉鋼管を挿入した状態を示す垂直断面図、図３は拡管機
構を示す垂直断面図、図４は伸縮機構による伸展作用を
示す垂直断面図、図５，６はそれぞれ図３のＸ−Ｘ、Ｙ
−Ｙ付近における水平断面図である。Embodiments of the present invention will be described below with reference to the drawings. 1 is a vertical sectional view showing a state in which a thick steel pipe is press-fitted into the ground and a vertical shaft is excavated by a vertical shaft excavator, FIG.
1 is a vertical cross-sectional view showing a state in which a thin-walled steel pipe having a bottom plate with a center pole is inserted in the shaft of FIG. 1, FIG. 3 is a vertical cross-sectional view showing a pipe expanding mechanism, and FIG. 4 is a vertical cross-sectional view showing an expanding action by an expansion mechanism. 5 and 6 are X-X and Y of FIG. 3, respectively.
It is a horizontal sectional view in the vicinity of -Y.
【００２９】図１，２において１０は立坑掘削機、１１
はグラブバケット、１２は厚肉鋼管、１３は薄肉鋼管、
１４はセンターポール、１５は底盤、１６は注水孔、１
６ｖは逆止弁、１７はセンタポール１４の長手方向に貫
通したグラウト孔、１９は底盤１５に設けたグラウト注
入孔を示す。また、図３，４に示すようにグラウト注入
孔１９には逆止弁１９ｖを設けている。In FIGS. 1 and 2, 10 is a vertical shaft excavator, 11
Is a grab bucket, 12 is a thick steel pipe, 13 is a thin steel pipe,
14 is a center pole, 15 is a bottom plate, 16 is a water injection hole, 1
6v is a check valve, 17 is a grout hole penetrating in the longitudinal direction of the center pole 14, and 19 is a grout injection hole provided in the bottom plate 15. Further, as shown in FIGS. 3 and 4, the grout injection hole 19 is provided with a check valve 19v.
【００３０】図３，４において、２０は薄肉鋼管１３の
底部に装入された立坑構築装置であり、立坑構築装置２
０は上下２段に配置された上部拡管機構Ａおよび下部拡
管機構Ｂで構成されている。ここで、図５は拡管機構
Ａ、図６は拡管機構Ｂを示しているが、これらの拡管機
構Ａ，Ｂには、それぞれ拡縮自在な８台の油圧ジャッキ
２１，２３が放射状に配置され、各油圧ジャッキ２１，
２３の先端には円弧状の押し型２２，２４が取付けら
れ、薄肉鋼管１３の内面形状に沿うような略円形状を成
している。一方、図３，４に示すように拡管機構Ａ，Ｂ
の間隔を変化させるための伸縮自在な油圧ジャッキ２５
が設けられている。In FIGS. 3 and 4, reference numeral 20 denotes a vertical shaft building apparatus installed at the bottom of the thin-walled steel pipe 13, and the vertical shaft building apparatus 2
Reference numeral 0 is composed of an upper pipe expanding mechanism A and a lower pipe expanding mechanism B which are arranged in upper and lower two stages. Here, FIG. 5 shows the pipe expanding mechanism A, and FIG. 6 shows the pipe expanding mechanism B. In these pipe expanding mechanisms A and B, eight hydraulic jacks 21 and 23, which are respectively expandable and contractible, are arranged radially. Each hydraulic jack 21,
Arc-shaped pressing dies 22, 24 are attached to the tip of 23, and have a substantially circular shape that follows the inner surface shape of the thin-walled steel pipe 13. On the other hand, as shown in FIGS.
Flexible hydraulic jack 25 for changing the interval between
Is provided.
【００３１】さらに、油圧ジャッキ２１，２３のロッド
Ｒが回転して押し型２２，２４がズレることがないよう
に回転防止部材Ｓが設けられている。なお、図示してい
ないが、油圧ジャッキ２１，２３，２５は、地上に設置
した操作盤でコントロールされた油圧ポンプから油圧ホ
ースを通して供給される油圧により作動する。Further, a rotation preventing member S is provided so that the rods R of the hydraulic jacks 21 and 23 do not rotate and the push dies 22 and 24 are displaced. Although not shown, the hydraulic jacks 21, 23, 25 are operated by hydraulic pressure supplied through a hydraulic hose from a hydraulic pump controlled by an operation panel installed on the ground.
【００３２】立坑構築装置２０により立坑を構築するに
は、まず図１に示すように立坑掘削機１０により厚肉鋼
管１２に揺動を与え圧入しながら内部をグラブバケット
１１で排土して立坑を設ける。In order to construct a vertical shaft by the vertical shaft construction device 20, first, as shown in FIG. 1, the vertical shaft excavator 10 rocks the thick steel pipe 12 and press-fits it while discharging the inside with the grab bucket 11 to dig the vertical shaft. To provide.
【００３３】次に、図２に示すように、厚肉鋼管１２で
築かれた立坑内部に、センターポール１４付きの底盤１
５を取り付けた薄肉鋼管１３を挿入する。このとき、立
坑内部に水１８があっても、底盤１５の注水孔１６の逆
止弁１６ｖを予め開いた状態にしておくことにより、注
水孔１６を通じて薄肉鋼管１３内に水１８を浸入させれ
ば、薄肉鋼管１３を容易に沈降させることができる。Next, as shown in FIG. 2, the bottom plate 1 with the center pole 14 is provided inside the shaft constructed by the thick-walled steel pipe 12.
Insert the thin-walled steel pipe 13 to which 5 is attached. At this time, even if there is water 18 inside the shaft, the check valve 16v of the water injection hole 16 of the bottom plate 15 is left open in advance to allow the water 18 to penetrate into the thin-walled steel pipe 13 through the water injection hole 16. For example, the thin steel pipe 13 can be easily settled.
【００３４】なお、注水孔１６の逆止弁１６ｖは薄肉鋼
管１３を沈降させるときは開放状態を保ち、最終的に薄
肉鋼管１３内から水を汲み上げるときには閉止状態とな
る必要があるため、逆止弁１６ｖと弁座との間に、空気
中では所定の硬さを有する固形物であって、一定時間水
に浸漬されると溶解消失してしまう物質を挟むという手
段を採っている。The check valve 16v of the water injection hole 16 must be kept open when the thin-walled steel pipe 13 is settled and finally closed when the water is pumped from the thin-walled steel pipe 13. A means of sandwiching between the valve 16v and the valve seat a substance which is a solid substance having a predetermined hardness in the air and which dissolves and disappears when immersed in water for a certain period of time is adopted.
【００３５】例えば、逆止弁１６ｖと弁座との間に飴玉
を挟んでおけば、薄肉鋼管１３を所定深さまで沈降させ
る間は逆止弁１６ｖを開放状態に保つため注水孔１６か
ら水１８の浸入が可能であり、その後は水に溶解して消
失してしまうため逆止弁１６ｖは自然に閉止状態とな
る。For example, if a hard candy is sandwiched between the check valve 16v and the valve seat, water is injected from the water injection hole 16 to keep the check valve 16v open while the thin-walled steel pipe 13 is settled to a predetermined depth. 18 can enter, and then dissolves in water and disappears, so that the check valve 16v is naturally closed.
【００３６】薄肉鋼管１３の設置が完了したら、図３に
示すように、立坑構築装置２０を薄肉鋼管１３の底部に
装入し、厚肉鋼管１２を拡管作業に影響しない程度に引
き上げ、下部拡管機構Ｂの油圧ジャッキ２３を伸展させ
押し型２４で薄肉鋼管１３を波形に成形した後、上部拡
管機構Ａの油圧ジャッキ２１を伸展させ押し型２２で薄
肉鋼管１３を波形に成形する。このときの上部拡管機構
Ａと下部拡管機構Ｂとの間隔が波形部分の間隔となる。When the installation of the thin-walled steel pipe 13 is completed, as shown in FIG. 3, the vertical shaft building device 20 is inserted into the bottom of the thin-walled steel pipe 13, and the thick-walled steel pipe 12 is pulled up to the extent that it does not affect the pipe expanding work, and the lower pipe is expanded. After the hydraulic jack 23 of the mechanism B is extended to form the thin-walled steel pipe 13 into a corrugated shape with the push die 24, the hydraulic jack 21 of the upper pipe expanding mechanism A is extended to form the thin-walled steel pipe 13 into a corrugated shape with the push die 22. At this time, the interval between the upper pipe expanding mechanism A and the lower pipe expanding mechanism B is the interval of the corrugated portion.
【００３７】次に、上部拡管機構Ａの油圧ジャッキ２１
を収縮させることにより、押し型２２を薄肉鋼管１３の
波形部分から離脱させ、図４に示すように、油圧ジャッ
キ２５を伸展させて上部拡管機構Ａを一段上昇させた
後、再び油圧ジャッキ２１を伸展させて押し型２２で薄
肉鋼管１３を波形に成形する。このとき、下部拡管機構
Ｂは押し型２４を薄肉鋼管１３の波形部分に当接させた
ままの状態であるため、立坑構築装置２０が落下したり
位置がズレたりすることはない。なお、厚肉鋼管１２は
波形加工作業の邪魔にならないように、作業の進行に合
わせて少しずつ上昇させていく。Next, the hydraulic jack 21 of the upper pipe expanding mechanism A.
, The push die 22 is disengaged from the corrugated portion of the thin-walled steel pipe 13, and the hydraulic jack 25 is extended to raise the upper pipe expanding mechanism A by one step as shown in FIG. The thin-walled steel pipe 13 is extended and formed into a corrugated shape by the pressing die 22. At this time, since the lower pipe expanding mechanism B keeps the pressing die 24 in contact with the corrugated portion of the thin-walled steel pipe 13, the vertical shaft building device 20 does not drop or shift its position. The thick-walled steel pipe 12 is gradually raised as the work progresses so as not to interfere with the corrugating work.
【００３８】このあと、下部拡管機構Ｂの油圧ジャッキ
２３を収縮させるこにより押し型２４を薄肉鋼管１３の
波形部分から離脱させ、油圧ジャッキ２５を収縮させて
下部拡管機構Ｂを一段上昇させた後、再び油圧ジャッキ
２３を伸展させて押し型２４を、先ほど上部拡管機構Ａ
の押し型２２により成形された波形部分に当接させるこ
とにより波形の形状を整える。このとき、上部拡管機構
Ａは押し型２２を薄肉鋼管１３の波形部分に当接させた
状態であるため、立坑構築装置２０が落下したり位置が
ズレたりすることはない。After that, the pressing die 24 is separated from the corrugated portion of the thin-walled steel pipe 13 by contracting the hydraulic jack 23 of the lower pipe expanding mechanism B, and the hydraulic jack 25 is contracted to raise the lower pipe expanding mechanism B one step further. , The hydraulic jack 23 is extended again, and the push die 24 is moved to the upper pipe expanding mechanism A.
The corrugated shape is adjusted by bringing the corrugated portion formed by the pressing die 22 into contact. At this time, since the upper die expanding mechanism A is in a state where the pressing die 22 is in contact with the corrugated portion of the thin-walled steel pipe 13, the vertical shaft building device 20 does not drop or shift in position.
【００３９】ここで、上部拡管機構Ａおよび下部拡管機
構Ｂにおける押し型２２，２４の配列状態は、図５およ
び図６に示すように、センターポール１４を中心にして
所定角度回転させた位置関係となっているため、上部拡
管機構Ａにおいて隣接する押し型２２同士の間隙に位置
していたことにより十分に成形できなかった凹部分１３
ａは、下部拡管機構Ｂの押し型２４によってきちんとし
た波形に成形されることになる。このため、波形部分に
不連続部分がなくなり、強度、特に耐圧力が大幅に向上
する。また、押し型２２，２４は円弧状であり薄肉鋼管
１３の内面形状に沿うような略円形状に配列されている
ため、薄肉鋼管１３に形成される波形は同心円状とな
る。Here, the arrangement state of the pressing dies 22 and 24 in the upper pipe expanding mechanism A and the lower pipe expanding mechanism B is, as shown in FIGS. 5 and 6, a positional relationship in which the pressing molds are rotated about the center pole 14 by a predetermined angle. Therefore, in the upper pipe expanding mechanism A, the recessed portion 13 that could not be sufficiently molded because it was located in the gap between the adjacent pressing dies 22.
The a is formed into a proper waveform by the pressing die 24 of the lower tube expanding mechanism B. Therefore, the corrugated portion has no discontinuous portion, and the strength, especially the pressure resistance is significantly improved. Further, since the pressing dies 22 and 24 are arcuate and are arranged in a substantially circular shape that follows the inner surface shape of the thin-walled steel pipe 13, the corrugations formed on the thin-walled steel pipe 13 are concentric.
【００４０】この後、再び上部拡管機構Ａの油圧ジャッ
キ２１を収縮させて押し型２２を薄肉鋼管１３の波形部
分から離脱させ、油圧ジャッキ２５を伸展させて上部拡
管機構Ａをさらに一段上昇させた後、再び油圧ジャッキ
２１を伸展させて押し型２２で薄肉鋼管１３を波形に成
形する。以下、厚肉鋼管１２を少しずつ上昇させなが
ら、この動作を繰り返すことにより薄肉鋼管１３に波形
を形成していく。After that, the hydraulic jack 21 of the upper pipe expanding mechanism A is contracted again to disengage the pressing die 22 from the corrugated portion of the thin steel pipe 13, and the hydraulic jack 25 is extended to raise the upper pipe expanding mechanism A one step further. After that, the hydraulic jack 21 is extended again and the thin-walled steel pipe 13 is formed into a corrugated shape by the pressing die 22. Hereinafter, the corrugation is formed in the thin-walled steel pipe 13 by repeating this operation while gradually raising the thick-walled steel pipe 12.
【００４１】すなわち、上部拡管機構Ａおよび下部拡管
機構Ｂによって薄肉鋼管１３を拡管する動作と、油圧ジ
ャッキ２５によって上部拡管機構Ａと下部拡管機構Ｂと
の距離を伸縮させる動作とを交互に反復することによ
り、図７に示すように、立坑構築装置２０を尺取り虫状
に上昇させていき、薄肉鋼管１３に連続した一定の波形
を形成していくことができる。That is, the operation of expanding the thin-walled steel pipe 13 by the upper tube expanding mechanism A and the lower tube expanding mechanism B and the operation of expanding and contracting the distance between the upper tube expanding mechanism A and the lower tube expanding mechanism B by the hydraulic jack 25 are alternately repeated. As a result, as shown in FIG. 7, the vertical shaft building device 20 can be lifted up in a worm-like manner to form a continuous constant waveform in the thin-walled steel pipe 13.
【００４２】ここで、地山が不均質で、例えば図８に示
すように岩石３０があった場合、上部拡管機構Ａの油圧
ジャッキ２１の押し型２２が岩石３０側の地山を押した
場合、その反力は対面の押し型２２付近の薄肉鋼管１３
とセンターポール１４にかかるが、このとき下部拡管機
構Ｂはセンターポール１４の変形を防止する役目も果た
している。なお、立坑構築装置２０は薄肉鋼管１３に押
し型２２，２４を当接させることにより装置自体を支持
しながら尺取り虫状に上昇していくため、センターポー
ル１４なしで薄肉鋼管１３を波形に成形していくことも
可能である。Here, when the ground is not homogeneous and there is rock 30 as shown in FIG. 8, for example, when the pressing die 22 of the hydraulic jack 21 of the upper pipe expanding mechanism A pushes the rock on the rock 30 side. , Its reaction force is the thin-walled steel pipe 13 near the facing die 22.
The lower pipe expanding mechanism B also serves to prevent the center pole 14 from being deformed. Since the vertical shaft building device 20 ascends to the thin-walled steel pipe 13 by pressing molds 22, 24 while supporting the device itself, the vertical shaft-building device 20 rises in a worm-like shape. It is also possible to go.
【００４３】薄肉鋼管１３の所定位置まで波形の形成が
終わったら、センターポール１４に削孔したグラウト孔
１７からモルタルＭなどを底盤１５下部にグラウトす
る。このとき、底盤１５のグラウト注入孔１９には逆止
弁１９ｖがあるためモルタルＭが逆流することはない。
したがって、モルタルのグラウトが終了すればモルタル
Ｍの硬化状態と無関係にセンターポール１４を取り外す
ことができるというメリットがある。After the corrugation is formed to a predetermined position of the thin steel pipe 13, the mortar M or the like is grouted from the grout hole 17 formed in the center pole 14 to the lower part of the bottom plate 15. At this time, since the check valve 19v is provided in the grout injection hole 19 of the bottom plate 15, the mortar M does not flow back.
Therefore, there is an advantage that the center pole 14 can be removed regardless of the hardening state of the mortar M when the mortar grout is completed.
【００４４】このあと、内部の水を汲み上げれば、図９
に示す状態となり立坑構築工事は完了する。なお、ここ
では２台の拡管機構を設けた場合について説明したが、
３台以上の拡管機構を設けた場合も前記と同様に動作さ
せることにより薄肉鋼管１３を波形に成形していくこと
が可能である。After that, if the water in the interior is pumped up, as shown in FIG.
The state shown in Fig. 3 is displayed and the shaft construction work is completed. Although the case where two tube expanding mechanisms are provided has been described here,
Even when three or more pipe expanding mechanisms are provided, the thin steel pipe 13 can be formed into a corrugated shape by operating in the same manner as described above.
【００４５】次に、図１０に基づいて、他の実施の形態
について説明する。この図に示す立坑構築装置４０は、
上下２段に配置した上部拡管機構Ａおよび下部拡管機構
Ｂで構成され、長手方向の貫通孔４１を有するセンター
ポール４２を上部拡管機構Ａの上部に立設するととも
に、貫通孔４２を下部拡管機構Ｂの下部まで貫通させ、
センターポール４２の上方に略水平の支持バー材４３を
取り付けている。Next, another embodiment will be described with reference to FIG. The shaft construction device 40 shown in this figure is
A center pole 42, which is composed of an upper pipe expanding mechanism A and a lower pipe expanding mechanism B, which are arranged vertically in two stages, and which has a through hole 41 in the longitudinal direction, is erected on the upper part of the upper pipe expanding mechanism A, and the through hole 42 is formed in the lower pipe expanding mechanism. Penetrate to the bottom of B,
A substantially horizontal support bar member 43 is attached above the center pole 42.
【００４６】立坑構築装置４０は、前述した立坑構築装
置２０の場合と全く同様に上部拡管機構Ａおよび下部拡
管機構Ｂを作動させることにより上昇しながら、厚肉鋼
管１２内の薄肉鋼管１３を波形に成形していくものであ
る。立坑構築装置４０では、センターポール４２の上方
に略水平の支持バー材４３を設けることによりセンター
ポールを短縮化するとともに、薄肉鋼管１３に成形され
た波形の中心位置がズレるのを防止することができる。
なお、立坑構築装置４０とともにセンターポール４２も
上昇していくため、支持バー材４３の先端部４３ａと薄
肉鋼管１３内面との間には若干の隙間を設けている。The vertical shaft building device 40 corrugates the thin-walled steel pipe 13 in the thick-walled steel pipe 12 while ascending by operating the upper pipe expanding mechanism A and the lower pipe expanding mechanism B just as in the case of the vertical shaft building device 20 described above. It is to be molded into. In the vertical shaft building device 40, by providing a substantially horizontal support bar member 43 above the center pole 42, it is possible to shorten the center pole and prevent the center position of the corrugations formed in the thin steel pipe 13 from shifting. it can.
Since the center pole 42 also rises together with the vertical shaft building device 40, a slight gap is provided between the tip end portion 43a of the support bar member 43 and the inner surface of the thin steel pipe 13.
【００４７】また、センターポール４２の長手方向から
下部拡管機構Ｂの下部まで貫通した貫通孔４１を設けて
いるため、予め先端部を底盤１５のグラウト注入孔１９
に連結したグラウトホース４４を貫通孔４１内に通して
おくことにより、グラウトホース４４を通じて地上から
底盤１５下方へのモルタル注入などを容易に行うことが
できる。Further, since the through hole 41 penetrating from the longitudinal direction of the center pole 42 to the lower portion of the lower tube expanding mechanism B is provided, the tip portion is previously provided with the grout injection hole 19 of the bottom plate 15.
By passing the grout hose 44 connected to the through hole 41 through the through hole 41, it is possible to easily perform mortar injection from the ground to the bottom of the bottom plate 15 through the grout hose 44.
【００４８】[0048]
【発明の効果】本発明により、以下の効果を奏すること
ができる。According to the present invention, the following effects can be obtained.
【００４９】（１）地中に立設した管状体内に装入され
放射方向に拡縮可能な拡管手段と、拡管手段を管状体の
軸線方向に移動させる移動手段とを備え、拡管手段で管
状体を拡管する動作と、移動手段で拡管手段を軸線方向
に移動させる動作とを交互に反復することにより管状体
を波形に成形するため、高強度の立坑を構築することが
できる。(1) The tubular body is equipped with a pipe expanding means which is inserted into a tubular body standing upright in the ground and can expand and contract in the radial direction, and a moving means which moves the pipe expanding means in the axial direction of the tubular body. Since the tubular body is formed into a corrugated shape by alternately repeating the operation of expanding the pipe and the operation of moving the pipe expanding means in the axial direction by the moving means, it is possible to construct a high-strength shaft.
【００５０】（２）拡管手段を放射方向に伸展させるこ
とにより管状体を拡管するため、管状体と同心円をなす
ような連続した形状の波形を形成することができ、均一
な強度の立坑を構築することができる。(2) Since the tubular body is expanded by extending the expanding means in the radial direction, it is possible to form a continuous waveform having a concentric circle with the tubular body, thereby constructing a shaft with uniform strength. can do.
【００５１】（３）薄肉管状体を波形に成形することに
より強度を向上させるため、厚肉鋼管を使用する必要が
なくなり、埋設する鋼管量が減り工事費を低減化でき
る。(3) Since the strength is improved by forming the thin-walled tubular body into a corrugated shape, it is not necessary to use a thick-walled steel pipe, the amount of steel pipe to be buried is reduced, and the construction cost can be reduced.
【００５２】（４）管状体内に装入される拡管手段を上
部拡管機構および下部拡管機構の２台で構成し、それぞ
れ管状体内面に沿うように略円形状に配列されかつ管状
体の放射方向に拡縮可能な押し型を備えることにより、
不連続部分のない均一な波形を形成することができるた
め、強度も均一で耐圧力に優れた立坑を構築できる。(4) The pipe expanding means to be inserted into the tubular body is composed of two units, an upper pipe expanding mechanism and a lower pipe expanding mechanism, which are arranged in a substantially circular shape along the inner surface of the tubular body and in the radial direction of the tubular body. By providing a press mold that can be expanded and contracted,
Since a uniform corrugation without discontinuities can be formed, it is possible to construct a vertical shaft having uniform strength and excellent pressure resistance.
【００５３】（５）拡管機構を管状体の軸線方向に２台
配置し、拡管機構の間隔を軸線方向に変化させる伸縮機
構を設けることにより尺取り虫状に上昇させながら立坑
構築できるため、吊下装置や押し上げ装置が不要でシン
プルな構造となり、取り扱いも容易である。(5) By arranging two tube expanding mechanisms in the axial direction of the tubular body and providing an expanding / contracting mechanism for changing the interval of the tube expanding mechanisms in the axial direction, it is possible to construct a vertical shaft while elevating in a worm-like manner. It has a simple structure without the need for a push-up device and is easy to handle.
【００５４】（６）もともと連続した管状体を波形に成
形して立坑を構築するため、立坑壁面に継ぎ目などが存
在せず、完全水密構造となる。また、工事中に作業者が
立坑内に入る必要がないため安全である。(6) Since a vertical shaft is originally formed by forming a continuous tubular body into a corrugated form, there is no joint on the wall surface of the vertical shaft, and a completely watertight structure is obtained. In addition, it is safe because workers do not have to enter the shaft during construction.
【００５５】（７）地中に立設された管状体を外管およ
び内管からなる二重構造とすることにより、外管のみを
徐々に引き上げながら内管の下部から順次波形に成形し
ていくことができるため、内管の変形などを防止するこ
とができる。(7) By forming the tubular body erected in the ground as a double structure consisting of an outer pipe and an inner pipe, only the outer pipe is gradually pulled up and formed into a corrugated shape from the lower part of the inner pipe in order. Since it is possible to go, it is possible to prevent deformation of the inner tube.
【００５６】（８）内管の下端部に底盤を取り付けるこ
とにより内管の強度が高まり外管内へ挿入する際の下端
部の変形を防止できるだけでなく、立坑底部へのコンク
リート打設および養生の手間を省略でき、立坑の水密性
も向上する。(8) By attaching a bottom plate to the lower end of the inner pipe, the strength of the inner pipe is enhanced and deformation of the lower end when inserted into the outer pipe can be prevented, and concrete pouring and curing at the bottom of the shaft can be prevented. It saves labor and improves the watertightness of the shaft.
【００５７】（９）底盤に逆止弁を有する注水孔を備え
ることにより、外管内へ内管を挿入する場合、逆止弁を
開いた状態にしておけば注水孔から内管の内部へ水を浸
入させることができるため内管の沈降を促進化できる。(9) When the inner pipe is inserted into the outer pipe by providing the bottom plate with a water injection hole having a check valve, if the check valve is kept open, water will flow from the water injection hole into the inner pipe. Can be infiltrated, so that the sedimentation of the inner tube can be promoted.
【００５８】（１０）長手方向の貫通孔を有する軸体を
底盤に立設することにより、立坑構築装置の支持部材と
することができるだけでなく、貫通孔内を通して地上か
ら底盤下方へのモルタル注入を容易に行うことができ
る。(10) By vertically arranging the shaft body having a through hole in the longitudinal direction on the bottom plate, it can be used as a support member of the vertical shaft construction device, and the mortar is injected from the ground to the lower part of the bottom plate through the through hole. Can be done easily.
【００５９】（１１）拡管手段の上部に軸体を立設し軸
体の上方に略水平の支持バー材を取り付けることによ
り、拡管手段を保持する軸体を短縮化することができ、
成形した波形の中心位置ズレを防止できる。また、軸体
の長手方向から体拡管手段の下部まで貫通する貫通孔を
設けることにより、貫通孔内を通して地上から底盤下方
へのモルタル注入などを容易に行うことができる。(11) By arranging the shaft body in the upper part of the pipe expanding means and attaching a substantially horizontal support bar member above the shaft body, the shaft body holding the pipe expanding means can be shortened,
It is possible to prevent deviation of the center position of the formed waveform. Further, by providing the through hole penetrating from the longitudinal direction of the shaft body to the lower portion of the body expanding means, it is possible to easily perform mortar injection from the ground to the bottom of the bottom plate through the through hole.
【図１】地中に厚肉鋼管を圧入し立坑掘削機で立坑を掘
削した状態を示す垂直断面図である。FIG. 1 is a vertical sectional view showing a state in which a thick steel pipe is press-fitted into the ground and a vertical shaft is excavated by a vertical shaft excavator.
【図２】図１の立坑にセンターポール付きの底盤を取付
けた薄肉鋼管を挿入した状態を示す垂直断面図である。FIG. 2 is a vertical cross-sectional view showing a state in which a thin-walled steel pipe having a bottom plate with a center pole attached is inserted into the shaft of FIG.
【図３】実施の形態における拡管機構による拡管作用を
示す垂直断面図である。FIG. 3 is a vertical cross-sectional view showing a pipe expanding operation by the pipe expanding mechanism in the embodiment.
【図４】実施の形態における伸縮機構による伸展作用を
示す垂直断面図である。FIG. 4 is a vertical cross-sectional view showing an extension action by the expansion mechanism in the embodiment.
【図５】図３のＸ−Ｘ付近における水平断面図である。5 is a horizontal sectional view in the vicinity of XX in FIG.
【図６】図３のＹ−Ｙ付近における水平断面図である。6 is a horizontal sectional view in the vicinity of YY of FIG.
【図７】実施の形態における立坑構築の工程説明図であ
る。FIG. 7 is a process explanatory diagram of vertical shaft construction in the embodiment.
【図８】実施の形態における拡管機構による拡管作用を
示す垂直断面図である。FIG. 8 is a vertical cross-sectional view showing a pipe expanding operation by the pipe expanding mechanism in the embodiment.
【図９】立坑構築後の状態を示す垂直断面図である。FIG. 9 is a vertical sectional view showing a state after construction of a vertical shaft.
【図１０】他の実施の形態を示す垂直断面図である。FIG. 10 is a vertical sectional view showing another embodiment.
１０ 立坑掘削機 １１ グラブバケット １２ 厚肉鋼管 １３ 薄肉鋼管 １３ａ 凹部分 １４ センターポール １５ 底盤 １６ 注水孔 １６ｖ，１９ｖ 逆止弁 １７ グラウト孔 １８ 水 １９ グラウト注入孔 ２０，４０ 立坑構築装置 Ａ 上部拡管機構 Ｂ 下部拡管機構 ２１，２３，２５ 油圧ジャッキ ２２，２４ 押し型 Ｒ ロッド Ｓ 回転防止部材 ３０ 岩石 Ｍ モルタル ４１ 貫通孔 ４２ センターポール ４３ 支持バー材 ４３ａ 先端部 ４４ グラウトホース 10 Shaft excavator 11 Grab bucket 12 Thick steel pipe 13 Thin steel pipe 13a Recessed portion 14 Center pole 15 Bottom plate 16 Water injection hole 16v, 19v Check valve 17 Grout hole 18 Water 19 Grout injection hole 20, 40 Vertical shaft construction device A Top expansion mechanism B Lower pipe expanding mechanism 21,23,25 Hydraulic jack 22,24 Push type R Rod S Anti-rotation member 30 Rock M Mortar 41 Through hole 42 Center pole 43 Support bar material 43a Tip part 44 Grout hose
Claims (6)
射方向に拡縮可能な拡管手段と、前記拡管手段を前記管
状体の軸線方向に移動させる移動手段とを備えた立坑構
築装置。1. A vertical shaft building apparatus equipped with a pipe expanding means that is inserted into a tubular body standing upright in the ground and can expand and contract in a radial direction, and a moving means that moves the pipe expanding means in an axial direction of the tubular body. .
ように略円形状に配列されかつ前記管状体の放射方向に
拡縮可能な押し型を有する上部拡管機構および下部拡管
機構で構成され、さらに前記移動手段が前記上部拡管機
構と下部拡管機構との間隔を軸線方向に変化させる伸縮
機構である請求項１記載の立坑構築装置。2. The tube expanding means comprises an upper tube expanding mechanism and a lower tube expanding mechanism, which are arranged in a substantially circular shape along the inner surface of the tubular body and have a pressing die capable of expanding and contracting in the radial direction of the tubular body, 2. The shaft construction device according to claim 1, wherein the moving means is an expansion / contraction mechanism that changes an interval between the upper pipe expanding mechanism and the lower pipe expanding mechanism in an axial direction.
び内管からなる二重構造である請求項１，２記載の立坑
構築装置。3. The shaft construction device according to claim 1, wherein the tubular body has a double structure including an outer pipe and an inner pipe that are slidable with respect to each other.
底盤に逆止弁を有する注水孔およびグラウト注入孔を設
けた請求項３記載の立坑構築装置。4. The shaft construction device according to claim 3, wherein a bottom plate is attached to a lower end portion of the inner pipe, and a water injection hole having a check valve and a grout injection hole are provided in the bottom plate.
の貫通孔を有する軸体を立設した請求項４記載の立坑構
築装置。5. The shaft construction device according to claim 4, wherein a shaft body having a through hole in a longitudinal direction is provided upright in the grout injection hole of the bottom plate.
を有する軸体を立設するとともに前記貫通孔を前記拡管
手段の下部まで貫通させ、さらに前記軸体の上方に略水
平の支持バー材を取り付けた請求項１〜４記載の立坑構
築装置。6. A shaft bar having a through hole extending in the longitudinal direction is erected on the upper part of the pipe expanding means, the through hole is made to penetrate to the lower part of the pipe expanding means, and a substantially horizontal support bar is provided above the shaft body. The shaft construction device according to claims 1 to 4, wherein a material is attached.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8085867A JP2920106B2 (en) | 1996-03-13 | 1996-03-13 | Shaft construction equipment |
| TW086102568A TW336974B (en) | 1996-03-13 | 1997-03-04 | Installation device of a vertical well |
| KR1019970007363A KR970065963A (en) | 1996-03-13 | 1997-03-06 | A granulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8085867A JP2920106B2 (en) | 1996-03-13 | 1996-03-13 | Shaft construction equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09242460A true JPH09242460A (en) | 1997-09-16 |
| JP2920106B2 JP2920106B2 (en) | 1999-07-19 |
Family
ID=13870854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8085867A Expired - Fee Related JP2920106B2 (en) | 1996-03-13 | 1996-03-13 | Shaft construction equipment |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2920106B2 (en) |
| KR (1) | KR970065963A (en) |
| TW (1) | TW336974B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000120066A (en) * | 1998-10-14 | 2000-04-25 | Nippon Steel Corp | Execution method for steel pipe pile |
| JP2000129671A (en) * | 1998-10-23 | 2000-05-09 | Nippon Steel Corp | Steel-pipe pile with knot, manufacture thereof, and bored-pile construction method for steel-pipe pile with knot |
| KR20210047205A (en) * | 2019-10-21 | 2021-04-29 | 삼호엔지니어링 주식회사 | Multi points extension apparatus for underground steel pipe and steel pipe pile section extension method using the same |
| KR20210047280A (en) * | 2019-10-21 | 2021-04-29 | 삼호엔지니어링 주식회사 | Steel pipe pile section extension method using multi points extension apparatus for underground steel pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119898B (en) * | 2020-03-24 | 2021-09-24 | 中铁工程装备集团有限公司 | Shaft expanding excavation tunneling machine and construction method thereof |
-
1996
- 1996-03-13 JP JP8085867A patent/JP2920106B2/en not_active Expired - Fee Related
-
1997
- 1997-03-04 TW TW086102568A patent/TW336974B/en active
- 1997-03-06 KR KR1019970007363A patent/KR970065963A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000120066A (en) * | 1998-10-14 | 2000-04-25 | Nippon Steel Corp | Execution method for steel pipe pile |
| JP2000129671A (en) * | 1998-10-23 | 2000-05-09 | Nippon Steel Corp | Steel-pipe pile with knot, manufacture thereof, and bored-pile construction method for steel-pipe pile with knot |
| KR20210047205A (en) * | 2019-10-21 | 2021-04-29 | 삼호엔지니어링 주식회사 | Multi points extension apparatus for underground steel pipe and steel pipe pile section extension method using the same |
| KR20210047280A (en) * | 2019-10-21 | 2021-04-29 | 삼호엔지니어링 주식회사 | Steel pipe pile section extension method using multi points extension apparatus for underground steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2920106B2 (en) | 1999-07-19 |
| KR970065963A (en) | 1997-10-13 |
| TW336974B (en) | 1998-07-21 |
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