JPS604328B2 - Cell submersion method - Google Patents

Cell submersion method

Info

Publication number
JPS604328B2
JPS604328B2 JP13798676A JP13798676A JPS604328B2 JP S604328 B2 JPS604328 B2 JP S604328B2 JP 13798676 A JP13798676 A JP 13798676A JP 13798676 A JP13798676 A JP 13798676A JP S604328 B2 JPS604328 B2 JP S604328B2
Authority
JP
Japan
Prior art keywords
cell
drive device
excavator
ground
excavation
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.)
Expired
Application number
JP13798676A
Other languages
Japanese (ja)
Other versions
JPS5362336A (en
Inventor
正之 尾西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP13798676A priority Critical patent/JPS604328B2/en
Publication of JPS5362336A publication Critical patent/JPS5362336A/en
Publication of JPS604328B2 publication Critical patent/JPS604328B2/en
Expired legal-status Critical Current

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Description

【発明の詳細な説明】 この発明は、護岸、岸壁、堤防等を構成する大径のプレ
ハブセルの沈設工法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for constructing large-diameter prefabricated cells constituting seawalls, quay walls, embankments, etc.

大蚤セルはその沈設が困難である。Large flea cells are difficult to sink.

すなわち全面的に沈設箇所を掘削することは掘削量が大
きくまた埋戻し作業も容易でない。そしてセルが土庄、
水圧に耐えるように特別の手段を施す必要がある。そこ
で多数の打込機械を使用するとか、セルを縦方向に、複
数に分割してそれぞれを順次打込むとかの方法が実施さ
れている。さらに海底の地盤が軟弱な場合、その軟弱層
を良質士に層換えてケーソンセルを沈設させる必要があ
る等種々の問題がある。この発明は前記従来の問題点に
対処すべく開発したもので、以下図示した実施例によっ
て説明する。
In other words, excavating the entire submerged area requires a large amount of excavation, and backfilling is not easy. And the cell is Tonosho,
Special measures must be taken to withstand water pressure. Therefore, methods such as using a large number of driving machines or dividing the cell vertically into a plurality of parts and driving each one in sequence have been implemented. Furthermore, when the seabed's ground is soft, there are various problems such as the need to replace the soft layer with a high-quality layer and sink the caisson cell. This invention was developed to address the above-mentioned conventional problems, and will be explained below with reference to the illustrated embodiments.

セルAは直径が通常1〜8hのコルゲートパィプ状をな
しているが、それ以上の直径のものや鋼板セルの場合も
ある。
Cell A is usually in the shape of a corrugated pipe with a diameter of 1 to 8 h, but may have a larger diameter or may be a steel plate cell.

このセルAの頃端には支持梁1が架渡され、その支持梁
1に取付けることによりセル上部中央に主回転モーター
からなる中央駆動装置2が固定して配置され、この中央
駆動装直2にビーム3が水平に、かつ放射状に取付けら
れ、そのビーム3の先端にはモーターからなる周辺駆動
装置4が設けられ、かつその周辺駆動装置からセル下端
より突設した長い回転軸を有し、高速回転する掘削機5
を設置されている。掘削機5はロッド6の先端にビット
7、好ましくは拡翼ビットを設け、またロッド6の中間
部分には着脱自在の蝿梓翼または突起8が多数突設され
ている。さらにロッド6は中空として水、空気の噴出と
、モルタルあるいは薬液の注入を可能ならしめておく。
施工に際してはクレーン船B等を利用して掘削機5、中
央駆動装置2、および周辺駆動装置4等を配置したセル
Aを軟弱地盤C上に設置し、中央駆動装置2を作動させ
てビーム3を回転させることにより掘削機5を低速で大
陸円状公転させ、かつ周辺駆動装置4を作動させて掘削
機5を高速で回転させ、それによってセル内部の地盤を
残してセルAの内壁の下方地盤を環状に掘削し、その掘
削に伴ってセルAを掘削溝に沈設させる。
A support beam 1 is spanned across the edge of this cell A, and by being attached to the support beam 1, a central drive device 2 consisting of a main rotating motor is fixedly arranged at the center of the upper part of the cell. A beam 3 is attached horizontally and radially to the cell, and a peripheral drive device 4 consisting of a motor is provided at the tip of the beam 3, and has a long rotating shaft protruding from the peripheral drive device from the lower end of the cell. Excavator 5 rotating at high speed
has been installed. The excavator 5 is provided with a bit 7, preferably a wing-spreading bit, at the tip of a rod 6, and a large number of removable fly wings or protrusions 8 protrude from the middle portion of the rod 6. Further, the rod 6 is hollow so that water and air can be ejected, and mortar or chemical solution can be injected.
During construction, cell A, in which the excavator 5, central drive device 2, peripheral drive device 4, etc. are arranged, is installed on soft ground C using a crane ship B, etc., and the central drive device 2 is activated to move the beam 3. By rotating the excavator 5, the excavator 5 is rotated in a continental circle at a low speed, and the peripheral drive device 4 is activated to rotate the excavator 5 at a high speed, thereby leaving the ground inside the cell below the inner wall of the cell A. The ground is excavated in a circular manner, and cell A is deposited in the excavated trench along with the excavation.

その際掘削した土のうち、粗粒、砂質分は掘削機により
搬出され、シルト質分はロッド6は突談された櫨梓翼ま
たは突起によって泥水と磯拝されロッド6の進行に伴っ
て生ずる構内へ、鷹拝された泥水とシルト質士が送られ
、構内への土砂の崩壊を防ぎ、またロッド6に生ずる大
きな曲げモーメントを避けうろことができる。
Of the soil excavated at this time, the coarse particles and sandy parts are carried out by an excavator, and the silty parts are mixed with muddy water by the rod 6 and the protrusions that are thrust into it, and as the rod 6 advances. The muddy water and silt deposits are sent to the resulting site to prevent the collapse of earth and sand into the site, and also to avoid large bending moments occurring in the rods 6.

そして地盤が硬い場合、あるいは支持層に達した場合ロ
ッド6より高圧水を噴出して地盤を掘削することができ
る。セルAが所定深さの支持地盤層Dに到達するとロッ
ド6よりモルタルあるいは薬液を注入してセルAの底部
を固定し、次いで掘削機5、各駆動装置2,4等を取外
し、かつ必要によりセルA内の環状溝を埋戻してセルA
の沈設を完了する。以上のような施工を順次繰返し、セ
ルAを連続的に沈設して護岸等を築造する。なお図にお
いてEは水中におけるセルAの根固ブロックを示す。こ
の発明は以上の構成からなり、プレハブセルの沈設に際
して軟弱地盤の掘削をセル全断面の掘削をせず、セル内
部の地盤を残してセル壁下方の地盤を円環状掘削をする
ため施工能率がよい。また軟弱地盤を貫いて直接支持地
盤に到達させることができるので軟弱士を良質士に直換
える必要がなく、施工に際して海水汚濁が少ない。また
掘削機のoッドーこ燈枠翼を設けて泥水工法を応用する
ようにしたので掘削溝の崩壊が防がれ、かつロッド‘こ
生ずる曲げ力を小さくすることができる。また掘削機の
反力は支持梁を介してセルにもたせることができる。さ
らに掘削機を高速回転し、掘削機の大蓬円状公転の回転
を遅くしたので中央の駆動装置におけるモーターのトル
クが小さくなり、ロッドに大きな曲げを生じないように
することができる。
If the ground is hard or if the supporting layer is reached, high pressure water can be ejected from the rod 6 to excavate the ground. When the cell A reaches the supporting ground layer D at a predetermined depth, mortar or chemical solution is injected through the rod 6 to fix the bottom of the cell A, and then the excavator 5, each driving device 2, 4, etc. are removed, and if necessary, Cell A by backfilling the annular groove in Cell A
Complete the installation of The above-mentioned construction is repeated one after another, cells A are successively deposited, and a bank protection etc. is constructed. In the figure, E indicates a solidified block of cell A in water. This invention has the above-mentioned configuration, and when sinking a prefabricated cell, the soft ground is not excavated across the entire cross section of the cell, but the ground beneath the cell wall is excavated in a circular pattern, leaving the ground inside the cell, which improves construction efficiency. good. In addition, since it can penetrate through soft ground and reach the supporting ground directly, there is no need to replace soft workers with quality workers, and there is less seawater pollution during construction. In addition, since the excavator is equipped with a light frame wing and the muddy water construction method is applied, collapse of the excavated trench can be prevented and the bending force caused by the rod can be reduced. Further, the reaction force of the excavator can be applied to the cell via the support beam. Furthermore, by rotating the excavator at high speed and slowing down the rotation of the excavator in its great circular revolution, the torque of the motor in the central drive device is reduced, making it possible to prevent large bending of the rod.

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

第1図はこの発明の実施態様の概要を示した斜視図、第
2図はセルと掘削機等の平面図である。 A・・・セル、B・・・クレーン船、C・・・軟弱地盤
、D・・・支持地盤層、E・・・根固ブロック、1・・
・支持梁、2・・・中央駆動装置、3…ビーム、4・・
・駆動装置、5・・・掘削機、6…ロッド、7・・・ビ
ット、8・・・蝿洋翼、または突起。第2図 第1図
FIG. 1 is a perspective view showing an outline of an embodiment of the present invention, and FIG. 2 is a plan view of a cell, an excavator, etc. A... Cell, B... Crane ship, C... Soft ground, D... Supporting ground layer, E... Foundation block, 1...
・Support beam, 2... Central drive device, 3... Beam, 4...
- Drive device, 5... Excavator, 6... Rod, 7... Bit, 8... Fly wing or protrusion. Figure 2 Figure 1

Claims (1)

【特許請求の範囲】[Claims] 1 セル上部中央に支持梁に固定して配置した中央駆動
装置から放射状にビームを突設し、そのビーム先端に周
辺駆動装置およびその周辺駆動装置からセル下端より突
設した長い回転軸を有する掘削機を設け、中央駆動装置
によって前記掘削機をセルの内壁に沿って低速で大径円
状回転させながら周辺駆動装置によって高速回転させ、
それによってセル内部の地盤を残してセル壁下方の地盤
を環状に掘削し、その掘削に伴って環状掘削溝内にセル
を沈設することを特徴とするセル沈設工法。
1 An excavation system in which a beam is provided radially protruding from a central drive device fixed to a support beam at the center of the top of the cell, and a peripheral drive device is provided at the tip of the beam, and a long rotation axis is provided from the peripheral drive device to the bottom end of the cell. a central drive device rotates the excavator in a large diameter circle along the inner wall of the cell at low speed, and a peripheral drive device rotates the excavator at high speed;
A cell sinking method characterized by excavating the ground below the cell wall in a circular manner while leaving the ground inside the cell, and sinking the cell into the circular excavation trench along with the excavation.
JP13798676A 1976-11-16 1976-11-16 Cell submersion method Expired JPS604328B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13798676A JPS604328B2 (en) 1976-11-16 1976-11-16 Cell submersion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13798676A JPS604328B2 (en) 1976-11-16 1976-11-16 Cell submersion method

Publications (2)

Publication Number Publication Date
JPS5362336A JPS5362336A (en) 1978-06-03
JPS604328B2 true JPS604328B2 (en) 1985-02-02

Family

ID=15211377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13798676A Expired JPS604328B2 (en) 1976-11-16 1976-11-16 Cell submersion method

Country Status (1)

Country Link
JP (1) JPS604328B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63120735U (en) * 1987-01-27 1988-08-04
JPH01228742A (en) * 1988-03-09 1989-09-12 Honda Lock Mfg Co Ltd Assembly line composed of combined working benches and working bench therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63120735U (en) * 1987-01-27 1988-08-04
JPH01228742A (en) * 1988-03-09 1989-09-12 Honda Lock Mfg Co Ltd Assembly line composed of combined working benches and working bench therefor

Also Published As

Publication number Publication date
JPS5362336A (en) 1978-06-03

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