JPS63184619A - Excavator beneath caisson wall - Google Patents
Excavator beneath caisson wallInfo
- Publication number
- JPS63184619A JPS63184619A JP1398887A JP1398887A JPS63184619A JP S63184619 A JPS63184619 A JP S63184619A JP 1398887 A JP1398887 A JP 1398887A JP 1398887 A JP1398887 A JP 1398887A JP S63184619 A JPS63184619 A JP S63184619A
- Authority
- JP
- Japan
- Prior art keywords
- caisson
- girder
- excavator
- suspended
- cutting edge
- 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
- 238000009412 basement excavation Methods 0.000 claims abstract description 26
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は海洋、湖沼及び河川内にｌ設される鉄道、＠梁
、水門若しくは人口島その他の構造物の基礎をケーソン
工法で築造する工事において、円筒状ケーソン壁直下の
地山を掘削するための掘削装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to construction work using the caisson construction method to construct the foundations of railways, beams, water gates, artificial islands, and other structures built in oceans, lakes, and rivers. The present invention relates to an excavation device for excavating the ground directly under the wall of a cylindrical caisson.
［従来の技術］
かかるケーソン壁直下すなわち刃口下の掘削を行う方法
としてケーソン内を空気で加圧し浸水を防止する工法の
場合、従来はケーソン内で作業員の人力による手掘り、
坑内Ｔ・ラクタショベル及び油圧ショベルによる機械掘
削が用いられていたが、建設する地点の水深が大きいと
空気での加圧圧力が高くなり、それらの方法では作業上
の限界がある。また浸水にかまわず空気での加圧を行わ
ない場合は水中掘削を行うことになるが、この場合、従
来はケーソン上部からグラブバケット掘削桟て掘削する
方法、土および岩を切削するビットを軸またはアームに
取付けそれを回転させて掘削する方法が用いられている
。[Prior Art] In the case of a method of excavating directly under the caisson wall, that is, under the cutting edge, in which the inside of the caisson is pressurized with air to prevent water intrusion, conventional methods include manual digging by workers inside the caisson,
Mechanical excavation using underground T-tract excavators and hydraulic excavators has been used, but if the water depth at the construction site is large, the pressurization pressure with air becomes high, and these methods have operational limitations. In addition, underwater excavation is carried out when air is not pressurized regardless of flooding, but in this case, conventionally, excavation was carried out using a grab bucket excavation pier from the top of the caisson, or using a bit for cutting soil and rock. Alternatively, a method of drilling by attaching it to an arm and rotating it is used.
［発明が解決しようとする問題点コ
高水深の場所へ圧気工法で基礎を築造する場合浸水防止
として空気圧を高くする必要がある。高圧下では人体生
理機能上の問題で有人を必要とする工法は採用できず、
一つの工法として加圧を行わない水中掘削の工法で施工
することになる。従来の水中掘削の工法の場合、グラブ
バケット掘削機の掘削領域が鉛直方向直下のみであるこ
とからケーソンの形状によってはケーソン上部から死角
にあたる刃口下は同機で掘削できない、またビットを回
転させて掘削する方法ではピッｉ・回転軌跡の範囲のみ
が掘削可能領域であるので、ケーソン形状によってはそ
の回転軌跡でカバーできない部位がある。このように基
礎底面部にあたる部分に掘削残部があるとその載荷支持
力を損うことになる。[Problems to be Solved by the Invention] When constructing a foundation using the pressurized air construction method in a place with high water depth, it is necessary to increase the air pressure to prevent flooding. Construction methods that require manned personnel cannot be used under high pressure due to problems with human physiology.
One of the construction methods will be underwater excavation, which does not require pressurization. In the case of conventional underwater excavation methods, the excavation area of the grab bucket excavator is only vertically below, so depending on the shape of the caisson, it is not possible to excavate with the same machine from the top of the caisson to the blind area below the cutting edge. In the excavation method, only the range of the rotary locus can be excavated, so depending on the shape of the caisson, there may be parts that cannot be covered by the rotary locus. In this way, if there is excavation residue in the area corresponding to the bottom of the foundation, its load-bearing capacity will be impaired.
この問題を解決するため本出願人は、特願昭６０−２５
０６６８号でケーソン壁肛下の掘削方法および装置を提
案した。該提案自体は有効なもので、ケーソン開口部に
平面部が多い場合に特に有効なものであるが、曲面部が
多い場合、特に円筒状ケーソンの場合には好適ではない
。In order to solve this problem, the present applicant filed a patent application filed in 1986-25.
No. 0668 proposed a method and device for excavating under a caisson wall. The proposal itself is effective, especially when the caisson opening has many flat parts, but it is not suitable when the caisson opening has many curved parts, especially in the case of a cylindrical caisson.
本発明にかかる従来鍔の水中掘削工法の不都合を解消し
、掘削不可領域が残らない円筒状のケーソン壁直下の掘
削装置を提供すべくなされたものである。The present invention has been made in order to eliminate the disadvantages of the conventional underwater excavation method of the collar and to provide an excavation device directly under the wall of a cylindrical caisson in which no excavable area remains.
［発明の構成］
本発明によるケーソン直下直下の掘削装置は、円筒状ケ
ーソンの上部に設けられたＦ型クレーンと、該橋型クレ
ーンから吊設されたケソーン内壁面に固定自在なリング
状の固定桁と、該固定桁に昇降自在に設けられた吊部材
と、該吊部材に吊設されたリング状のレールと、該リン
グ状のレールに旋回自在に吊設された十字状の旋回桁と
、該十字状の旋回桁の一方の桁に半径方向に移動自在に
吊設された刃口掘削機と、他方の桁に半径方向に移動自
在に吊設されたバックドーザおよびフロントドーザとを
設けている。[Structure of the Invention] The excavation device directly under the caisson according to the present invention includes an F-type crane installed on the top of the cylindrical caisson, and a ring-shaped fixing device that can be freely fixed to the inner wall surface of the caisson and is suspended from the bridge-type crane. A girder, a hanging member provided on the fixed girder so that it can be raised and lowered, a ring-shaped rail suspended from the hanging member, and a cross-shaped turning girder suspended from the ring-shaped rail so that it can rotate freely. A cutting edge excavator is installed on one side of the cross-shaped turning girder so as to be movable in the radial direction, and a back dozer and a front dozer are installed on the other girder so as to be movable in the radial direction. ing.
［発明の作用効泉］
従って、走行台車による掘削機の刃口側への移動、掘削
機のカッタの刃口側への移動、旋回桁の旋回によりｍＶ
矢板の所まで掘削し、次いで逐次旋回桁を昇降し前記同
様の掘削を行い、ケーソン壁直下を死角部分を残すこと
なく掘削することができる。その結果、従来の水中工法
における基礎底面にあたる部分に掘削残土があって載荷
支持力が損われるという問題は解決される。[Effective Spring of the Invention] Therefore, by moving the excavator toward the cutting edge side by the traveling cart, moving the cutter of the excavating machine toward the cutting edge side, and rotating the rotating girder, the mV
Excavation is carried out up to the sheet pile, and then the turning girder is raised and lowered one by one to carry out the same excavation as described above, thereby making it possible to excavate directly below the caisson wall without leaving any blind spots. As a result, the problem of conventional underwater construction methods in which there is excavated soil at the bottom of the foundation and the load-bearing capacity is impaired is solved.
［実施例コ 以下図面を参照して本発明の詳細な説明する。[Example code] The present invention will be described in detail below with reference to the drawings.
本実施例は、海峡部に架ける橋梁の基礎を施工する例で
、第１国に示すように、Ｓ底を掘削し均した面に円筒状
のケーソン１を設置し、ケーソン外周を鋼管矢板２を連
続した壁状に施工ののち、その＃ｉｉ管矢仮２に囲まれ
たケーソン内部の海底地盤を所定深さまで掘り下げて基
礎載荷面とし、その而からコンクリートを打ち上げ基礎
路体を築造する工事において、ケーソン直下を掘削する
装置について述べる。This example is an example of constructing the foundation of a bridge over a strait.As shown in the first country, a cylindrical caisson 1 is installed on a leveled surface after excavating the S bottom, and the outer periphery of the caisson is covered with steel pipe sheet piles 2. After constructing it in the form of a continuous wall, the seabed ground inside the caisson surrounded by #II pipe 2 will be dug to a predetermined depth to serve as the foundation loading surface, and concrete will be poured from there to construct the foundation road body. In this section, we will describe the equipment that excavates directly below the caisson.
図において、ケーソン１の上部には、橋型クレーン１０
が旋回自在に設けられている。その橋型クレーン１０の
ガータ１１上には固定桁吊装置１２．１２が設けられ、
この固定桁吊装置１２には吊ロッド１３を介して固定桁
１４が昇降自在に吊設されている。In the figure, a bridge type crane 10 is mounted on the top of the caisson 1.
is rotatably provided. A fixed girder lifting device 12.12 is provided on the gutter 11 of the bridge type crane 10,
A fixed girder 14 is suspended from the fixed girder hanging device 12 via a hanging rod 13 so as to be movable up and down.
固定桁１４は第２図右手部にも示すように、３重の同心
円状のリング析１４ａ、１４ｂおよび１４ｃによりフレ
ーム状←こ組立てられ、外側リング桁１４ａの外側には
複数ｍ（図示の例では円周等配に４個）の固定ジヤツキ
１５が設けられている。As shown on the right hand side of FIG. 4) fixed jacks 15 are provided at equal intervals around the circumference.
この固定桁１４の固定ジヤツキ１５の部分には、リング
ｌｆｒ １４ ａ、１４ｂに支持されて吊ビームグリッ
パ１６が立設され、それら吊ビームグリッパ１６には吊
部材である吊ビーム１７が昇降自在に収められている。A hanging beam gripper 16 is erected at the fixed jack 15 portion of the fixed girder 14, supported by rings lfr 14a, 14b. It is contained.
それら吊ビーム１７の下端には、リング状のレール１８
ａ、１８ｂが吊設されている。第２図左半部にも示すよ
うに、そのレール１８ａはリング桁１４ａ、１４ｂの略
中間下方に設けられ、レール１８ｂはリング桁１４ｃの
下方に設けられ、両レール１４ａ、１４ｃはフレーム状
に組立てられている。A ring-shaped rail 18 is provided at the lower end of the suspension beams 17.
a and 18b are suspended. As shown in the left half of FIG. 2, the rail 18a is provided approximately halfway down between the ring girders 14a and 14b, the rail 18b is provided below the ring girder 14c, and both rails 14a and 14c are arranged in a frame shape. It is assembled.
それらレール１８ａ、１８ｂには旋回桁１９が旋回自在
に吊設されている。その旋回桁１９は第３図に示すよう
に、十字状に組合された走行析２０．２１からなり、そ
れぞれの桁にはレール１８ａに当接する車輪２２ａｔ−
備えた旋回装Ｗ２２が設けられている。そして、走行桁
２０には、走行台＄２３を介して２台の刃口掘削機２４
．２４が移動自在に対向して吊設され、走行桁２１には
、走行台車２８．２９を介してバックドーザ３０、フロ
ントドーザ３１がそれぞれ移動自在に対向して吊設され
ている。なお、走行台車２３は走行桁２０の任意の位置
に係止できるようになっている。A swing girder 19 is swingably suspended from the rails 18a and 18b. As shown in FIG. 3, the swing girder 19 consists of running wheels 20, 21 assembled in a cross shape, and each girder has a wheel 22at-22 in contact with the rail 18a.
A swing device W22 is provided. Two blade excavators 24 are connected to the traveling girder 20 via a traveling platform $23.
．． A back dozer 30 and a front dozer 31 are respectively movably suspended from the running girder 21 via running carts 28 and 29. Note that the traveling carriage 23 can be locked at any position on the traveling girder 20.
刃口掘削８Ｍ２４の水平アーム２５は走行台車２３から
伸縮自在に吊設され、そのアーム２５には旋回装’ｌ
２６を介してカッタ２７が設けられている。The horizontal arm 25 of the cutting edge excavator 8M24 is telescopically suspended from the traveling trolley 23, and the arm 25 is equipped with a rotating device.
A cutter 27 is provided via 26.
他方、旋回桁１９の軸線上には、ギャザリング装置３を
備えたサクションマウス４が設けられ、そのサクション
マウス４はサクションマウス伸縮装と５を介して揚泥管
６に接続されている。そして、揚泥管６の上端付近には
、海面Ｗ上に浮設された沈砂池用ポンツーン７が設けら
れている。On the other hand, a suction mouth 4 equipped with a gathering device 3 is provided on the axis of the swing girder 19, and the suction mouth 4 is connected to the mud pumping pipe 6 via a suction mouth telescoping device 5. Near the upper end of the mud pumping pipe 6, a pontoon 7 for a sand settling basin is provided which is floating on the sea surface W.
掘削に際し、端型クレーン１０から吊ロッド１３により
旋回桁１９を吊設した固定桁１４をケーソン開口内所定
位置に吊り下し、固定ジヤツキ１５を張り出して固定桁
１４をケーソン内壁面に固定する。この際、吊ビームグ
リップ１６により吊ビーム１７を上昇して旋回桁１９を
２点鎖線の位置に上げておき、また、刃口掘削機２４、
バックドーザ３０、フロントドーザ３１を旋回桁１９の
中心側に移動し、刃口掘削ｆｉ２４のアーム２５を２点
鎖線に示すように収縮しておく。During excavation, the fixed girder 14 with the swing girder 19 suspended from the end type crane 10 is suspended at a predetermined position within the caisson opening by the hanging rod 13, and the fixed jack 15 is extended to fix the fixed girder 14 to the inner wall surface of the caisson. At this time, the suspension beam 17 is raised by the suspension beam grip 16 and the swing girder 19 is raised to the position indicated by the two-dot chain line.
The back dozer 30 and the front dozer 31 are moved to the center side of the turning girder 19, and the arm 25 of the cutting edge excavation fi 24 is contracted as shown by the two-dot chain line.
次いで、ケーソン開口部の掘削すなわち口切り掘削を行
う０口切り掘削は旋回桁１９を旋回して掘削しミ礪はバ
ックドーザ３０で掻き寄せ、フロントドーザ３１でサク
ションマウス４の方に掻き出して海水とともに揚泥管６
を介して沈砂池用ポンツーン７に揚げ、ポンツーン７で
分離し図示しないクラムシェル等で土搬船に移す０次に
、吊ビーム１７を降下させて旋回桁１９を旋回し、所定
深さＤ″Ｊ、で掘削する。Next, the caisson opening is excavated, that is, the 0-cut excavation is carried out by rotating the revolving girder 19, and the dirt is scraped up by the back dozer 30, and then scraped out toward the suction mouth 4 by the front dozer 31, and pumped out together with seawater. mud pipe 6
The material is lifted to a pontoon 7 for a sand settling pond, separated by the pontoon 7, and transferred to an earth carrier using a clamshell or the like (not shown).Next, the suspension beam 17 is lowered and the swivel girder 19 is rotated to a predetermined depth D''. Excavate with J.
次いで、ケーソン直下すなわち刃口下の掘削を行う、刃
口下の掘削は、口切り掘削終了時の掘削機２４の位置（
１点ａｍで示す）から走行台車２３を刃口側に移動し、
アーム２５を伸長しながら旋回桁１９を旋回して掘削す
る。そして、鋼管矢板２の所まで掘削したら、走行台車
２３を原位置に戻してアーム２５を収細し、吊ビーム１
７を上昇させて旋回桁１９を所定高さだけ引上げ、前述
と同様の掘削を行い、ケーソン１の直下面の所まで掘削
して刃口下の掘削を終る。この間、副は口切り掘削と同
様にバックドーザ３０で掻き寄せ、フロントドーザ３１
でサクシランマウス４側へ掻き出し、揚泥管６を介して
沈砂池用ポンツーン７に揚げる。なお、この刃口下の１
ｌｉｉｌｌ！Ｊに際し、前述とは逆に掘削８２４をケー
ソン直下直下から降下させて所定深度りまで掘削しても
よい。Next, excavation is performed directly below the caisson, that is, under the cutting edge.
Move the traveling cart 23 from one point (indicated by am) to the blade mouth side,
While extending the arm 25, the swing girder 19 is rotated to excavate. After excavating to the steel pipe sheet pile 2, the traveling truck 23 is returned to its original position, the arm 25 is retracted, and the hanging beam 1 is
7 is raised to raise the swing girder 19 to a predetermined height, and excavation is performed in the same manner as described above, until the area directly below the caisson 1 is reached, and the excavation under the cutting edge is completed. During this time, the secondary material is scraped by the back dozer 30 in the same way as the opening excavation, and the front dozer 31
The slurry is scraped out to the side of the saxiran mouth 4 and lifted to the pontoon 7 for a sand settling basin via the mud lifting pipe 6. In addition, 1 below the blade mouth
liill! In J, contrary to the above, the excavation 824 may be lowered from directly below the caisson to excavate to a predetermined depth.
［まとめ］
以上説明したように本発明によれば、走行台車による掘
ｌｌｌ１ｍの刃口側への移動、掘削機のアームの伸長、
旋回桁の旋回、昇降によりケーソンの刃口下を死角部分
を残すことなく掘削し、従来工法における載荷支持力が
損われる問題を解決することができる。[Summary] As explained above, according to the present invention, it is possible to move the excavation truck by 1 m to the cutting edge side, extend the arm of the excavator,
By rotating and raising and lowering the swivel girder, it is possible to excavate under the cutting edge of the caisson without leaving any blind spots, thus solving the problem of loss of load supporting capacity in conventional construction methods.
第１１２１は本発明の一実施例を示す側面図、第２図は
右手因に第１図のＡ矢視図、左半部に第１図のＢ矢視図
を示す図面、第３図は第１図のＣ矢視図である。1121 is a side view showing one embodiment of the present invention, FIG. 2 is a drawing showing a view in the direction of arrow A in FIG. 1 on the right hand side, a view on the arrow B in FIG. FIG. 2 is a view taken along arrow C in FIG. 1;
Claims (1)
橋型クレーンから吊設されたケーソン内壁面に固定自在
なリング状の固定桁と、該固定桁に昇降自在に設けられ
た吊部材と、該吊部材に吊設されたリング状のレールと
、該リング状のレールに旋回自在に吊設された十字状の
旋回桁と、該十字状の旋回桁の一方の桁に半径方向に移
動自在に吊設された刃口掘削機と、他方の桁に半径方向
に移動自在に吊設されたバックドーザおよびフロントド
ーザとを設けたことを特徴とするケーソン壁直下の掘削
装置。A bridge type crane installed on the top of a cylindrical caisson, a ring-shaped fixed girder that is suspended from the bridge type crane and can be fixed to the inner wall surface of the caisson, and a hanging member provided on the fixed girder so that it can be raised and lowered. , a ring-shaped rail suspended from the hanging member, a cross-shaped turning girder rotatably suspended from the ring-shaped rail, and a movement in the radial direction to one girder of the cross-shaped turning girder. 1. An excavation device directly under a caisson wall, characterized in that it is equipped with a freely suspended cutting edge excavator, and a back dozer and a front dozer that are suspended from the other girder so as to be movable in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62013988A JPH0625416B2 (en) | 1987-01-26 | 1987-01-26 | Excavator just below the cason wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62013988A JPH0625416B2 (en) | 1987-01-26 | 1987-01-26 | Excavator just below the cason wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63184619A true JPS63184619A (en) | 1988-07-30 |
| JPH0625416B2 JPH0625416B2 (en) | 1994-04-06 |
Family
ID=11848609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62013988A Expired - Fee Related JPH0625416B2 (en) | 1987-01-26 | 1987-01-26 | Excavator just below the cason wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625416B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115617A (en) * | 1989-09-29 | 1991-05-16 | Komatsu Ltd | Excavator of ground inside caisson |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5789025A (en) * | 1980-11-21 | 1982-06-03 | Taisei Corp | Method and device for excavating periphery of caisson cutting edge |
| JPS6040429A (en) * | 1983-08-12 | 1985-03-02 | Mitsui Miike Mach Co Ltd | Excavation work for burying cylindrical structure |
| JPS60172896U (en) * | 1984-04-24 | 1985-11-15 | 石川島播磨重工業株式会社 | shaft drilling equipment |
-
1987
- 1987-01-26 JP JP62013988A patent/JPH0625416B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5789025A (en) * | 1980-11-21 | 1982-06-03 | Taisei Corp | Method and device for excavating periphery of caisson cutting edge |
| JPS6040429A (en) * | 1983-08-12 | 1985-03-02 | Mitsui Miike Mach Co Ltd | Excavation work for burying cylindrical structure |
| JPS60172896U (en) * | 1984-04-24 | 1985-11-15 | 石川島播磨重工業株式会社 | shaft drilling equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115617A (en) * | 1989-09-29 | 1991-05-16 | Komatsu Ltd | Excavator of ground inside caisson |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0625416B2 (en) | 1994-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |