JPH0751845B2 - Wire saw method for dismantling underwater structures - Google Patents
Wire saw method for dismantling underwater structuresInfo
- Publication number
- JPH0751845B2 JPH0751845B2 JP18180788A JP18180788A JPH0751845B2 JP H0751845 B2 JPH0751845 B2 JP H0751845B2 JP 18180788 A JP18180788 A JP 18180788A JP 18180788 A JP18180788 A JP 18180788A JP H0751845 B2 JPH0751845 B2 JP H0751845B2
- Authority
- JP
- Japan
- Prior art keywords
- wire saw
- concrete structure
- diamond wire
- tension
- diamond
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
- B23D57/0084—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 specially adapted for sawing under water or at places accessible with difficulty
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/08—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws
- B28D1/088—Sawing in situ, e.g. stones from rocks, grooves in walls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
【発明の詳細な説明】 《産業上の利用分野》 この発明は、水中に設けたコンクリート構造物の解体切
断作業に好適なワイヤソー工法に関するものである。TECHNICAL FIELD The present invention relates to a wire saw method suitable for demolition and cutting work of a concrete structure provided in water.
《従来の技術》 ワイヤソー工法は、切削用のダイヤモンドワイヤソーを
被切削物であるコンクリート構造物の外周に巻き付け、
離れた位置からこのダイヤモンドワイヤソーを無端状態
で回転駆動するとともに、これに所定のテンションを加
えることにより徐々にコンクリート構造物を巻回方向に
沿って切削して切断する工法であり、一般に地表に構築
されたコンクリート構造物の解体作業に用いられてい
る。<< Conventional technology >> The wire saw method involves winding a diamond wire saw for cutting around the outer periphery of a concrete structure, which is the object to be cut,
This is a construction method in which the diamond wire saw is driven to rotate endlessly from a distant position, and by applying a predetermined tension to this, the concrete structure is gradually cut and cut along the winding direction. It is used for the demolition work of a concrete structure.
この工法を例えば、橋梁下部，護岸擁壁，修理ドック，
導水路，カルバート等の水中コンクリート構造物に適合
させるようにすると、以下の問題が生ずる。This method can be applied to, for example, lower bridges, seawall retaining walls, repair docks,
If it is adapted to an underwater concrete structure such as a headrace or culvert, the following problems will occur.
《発明が解決しようとする課題》 一般に解体しようとする水中に構築されているコンクリ
ート構造物が陸地に接近している場合には、主駆動装置
およびテンション付与のためのブースタを陸上に据え付
けて、ダイヤモンドワイヤソーの一端を主駆動装置の回
転駆動用プーリに懸架し、ブースタにその中間を支持さ
せた状態で、他端を水中構造物の外周に巻回して、ダイ
ヤモンドワイヤソーの端部同士を連結して無端状態に
し、主駆動装置の駆動によってダイヤモンドワイヤソー
を回転させて切削作業を行うことができる。<< Problems to be solved by the invention >> Generally, when a concrete structure constructed in water to be dismantled is approaching land, a main drive unit and a booster for tensioning are installed on land, One end of the diamond wire saw is suspended on the rotary drive pulley of the main drive unit, and the other end is wound around the underwater structure with the booster supporting the middle thereof, and the ends of the diamond wire saw are connected to each other. Then, the diamond wire saw is rotated by the drive of the main drive unit to perform the cutting work.
しかし、このような方法ではダイヤモンドワイヤソーの
かなりの部分が水中に没入するので、特に、陸上から被
切削物までの距離が遠く離れている場合には、ダイヤモ
ンドワイヤソーの長さも長くなるので、水の抵抗を受け
る分だけ張力が増大し、ダイヤモンドワイヤソー自体の
強度が不足し、ダイヤモンドワイヤソーそのものが切断
され易くなる。However, since a large part of the diamond wire saw is immersed in the water in such a method, the length of the diamond wire saw also becomes long, especially when the distance from the land to the work piece is long, so that the water The tension increases as much as the resistance is received, the strength of the diamond wire saw itself is insufficient, and the diamond wire saw itself is easily cut.
この問題を解決する方法としては、強度不足を補うため
にダイヤモンドワイヤソーの径を太くして強度を上げる
ことが考えられる。この種の工法ではダイヤモンドワイ
ヤソーの価格が工事の採算性に大きく影響しているの
で、径を太くし、また陸上からの距離に応じて長さを長
くするなどの対策を講じた場合には著しく工費が増し、
採算性が乏しくなる。As a method for solving this problem, it is considered that the diameter of the diamond wire saw is increased to increase the strength in order to compensate for the insufficient strength. In this type of construction method, the price of diamond wire saw has a great influence on the profitability of the construction, so if you take measures such as increasing the diameter and lengthening according to the distance from the land, it will be remarkable. Construction costs have increased,
Profitability becomes poor.
この発明は以上の問題を解決するものであって、装置を
台船上に積載することによってコンクリート構造物が陸
上より遠く離れていても台船を付近の水面に移動させる
ようにすることで、ダイヤモンドワイヤソーの長さを短
くしてコンクリート構造物の切削を行えるようにした水
中構造物の解体用ワイヤソー工法を提供することを目的
とするものである。The present invention is to solve the above problems, and by loading the device on a pedestal to move the pedestal to the nearby water surface even if the concrete structure is farther than land, the diamond It is an object of the present invention to provide a wire saw method for dismantling an underwater structure, which is capable of cutting a concrete structure by shortening the length of the wire saw.
《課題を解決するための手段》 前記目的を達成するため、この発明は、水中に設けたコ
ンクリート構造物にダイヤモンドワイヤソーを巻回し、
このダイヤモンドワイヤソーを無端回転させることによ
ってコンクリート構造物を切削する工法において、前記
コンクリート構造物の近傍の水面上を浮遊する台船と、
この台船上に据え付けられたワイヤ駆動装置と動式の張
力調整機構とを備え、前記コンクリート構造物と前記ワ
イヤ駆動装置との間にダイヤモンドワイヤソーを巻回
し、且つ、前記張力調整機構を前記ワイヤ駆動装置の前
部側で前記ダイヤモンドワイヤソーに取付け、前記ワイ
ヤ駆動装置を介して回転させられる前記ダイヤモンドワ
イヤソーを前記台船の揺動および切削の進行度合いに応
じて前記張力調整機構によって一定のテンションに調整
したものである。<< Means for Solving the Problem >> In order to achieve the above object, the present invention is to wind a diamond wire saw around a concrete structure provided in water,
In a method of cutting a concrete structure by rotating the diamond wire saw endlessly, a pontoon floating on the water surface in the vicinity of the concrete structure,
A wire driving device installed on the ship and a dynamic tension adjusting mechanism are provided, a diamond wire saw is wound between the concrete structure and the wire driving device, and the tension adjusting mechanism is driven by the wire driving device. The diamond wire saw attached to the diamond wire saw on the front side of the device and rotated by the wire drive device is adjusted to a constant tension by the tension adjusting mechanism according to the degree of rocking and cutting progress of the boat. It was done.
《作用》 以上の構成によれば、台船を被切削物である水中コンク
リート構造物の近傍に位置させることができ、これに設
けたワイヤ駆動装置とコンクリート構造物の間でダイヤ
モンドワイヤソーが無端状態で回転し、切削作業を行
う。台船の揺動によるダイヤモンドワイヤソーのテンシ
ョンの変化あるいは切削の進行によるダイヤモンドワイ
ヤソーの弛みは動式の張力調整機構によって解消され、
常時一定のテンションを保ちながらコンクリート構造物
の切削−切断作業が可能となる。<Operation> According to the above configuration, the pontoon can be located near the underwater concrete structure that is the object to be cut, and the diamond wire saw is in an endless state between the wire drive device and the concrete structure provided on the undercarriage. Rotate at and perform cutting work. The change in tension of the diamond wire saw due to the rocking of the boat or the looseness of the diamond wire saw due to the progress of cutting is eliminated by the dynamic tension adjusting mechanism,
It is possible to cut and cut concrete structures while always maintaining a constant tension.
《実施例》 以下、この発明の一実施例を図面を用いて詳細に説明す
る。<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the drawings.
図において、ワイヤソー工法に用いられる装置は、被切
削物である水中に構築されたコンクリート構造物１の近
傍の水面上に浮かぶ台船２と、台船２上に据え付けられ
たワイヤ駆動装置３、およびワイヤ駆動装置３の前部側
に設けられた張力調整機構４を備えている。In the figure, a device used for the wire saw method is a pedestal 2 floating on the water surface near a concrete structure 1 constructed in water, which is an object to be cut, and a wire drive device 3 installed on the pedestal 2. And a tension adjusting mechanism 4 provided on the front side of the wire driving device 3.
そして、ダイヤモンドワイヤソー５は一端を前記コンク
リート構造物１に巻回され、他端を前記台船２の舳先側
に設けた一対のガイドプーリ６および前記張力整機構４
を経て前記ワイヤ駆動装置３の回転駆動用プーリ3aに巻
回した後、端部同士を連結して、コンクリート構造物１
との間で無端状態で回転可能に懸架されている。The diamond wire saw 5 has one end wound around the concrete structure 1 and the other end provided on the bow side of the pontoon 2 with a pair of guide pulleys 6 and the tension adjusting mechanism 4.
After being wound around the rotary drive pulley 3a of the wire drive device 3 through the ends, the end portions are connected to each other to form the concrete structure 1
It is rotatably suspended between and.
前記台船２は図示しないアンカー等により水面上の一定
位置に固定され、波などのうねりによって上下または前
後左右に多少揺動する。The pontoon 2 is fixed at a fixed position on the water surface by an anchor or the like (not shown), and is slightly swung up and down or front and back and left and right due to the swell of waves.
前記張力調整機構３はダイヤモンドワイヤソー５の引っ
張り側5aおよび送り側5bをそれぞれガイドする複数のガ
イドローラ７と、ガイドローラ７間に配置され、それぞ
れ引っ張り側5aおよび送り側5bにテンションを付与する
テンションローラ８とからなっている。The tension adjusting mechanism 3 is arranged between a plurality of guide rollers 7 for guiding the pulling side 5a and the feeding side 5b of the diamond wire saw 5, and a tension for applying tension to the pulling side 5a and the feeding side 5b, respectively. It consists of a roller 8.
各テンションローラ８には重錘９が吊下され、常時各テ
ンションローラ８を一定の荷重で常時下降すべく下部側
に付勢し、これとの釣り合いが取れた状態でダイヤモン
ドワイヤソー５に所定のテンションを与えている。A weight 9 is suspended from each tension roller 8, and each tension roller 8 is constantly urged downward with a constant load so as to be constantly lowered. Giving tension.
また、台船２の上下ないし前後左右の揺動によって各テ
ンションローラ８はダイヤモンドワイヤソー５に加わる
テンションを一定とすべく上下し、揺動によるダイヤモ
ンドワイヤソー５の弛みや過度の緊張状態を緩和する。Further, each tension roller 8 is moved up and down to swing a tension applied to the diamond wire saw 5 to a constant level by swinging the boat 2 up and down or front and back and left and right, so that the looseness and excessive tension of the diamond wire saw 5 due to the swinging are relaxed.
また、ダイヤモンドワイヤソー５が無端状態で回転し、
コンクリート構造物１の切削作業が進行すると、テンシ
ョンを一定に保つべく降下して切削による緩みを解消す
ることになる。Also, the diamond wire saw 5 rotates endlessly,
As the cutting work of the concrete structure 1 progresses, the tension is lowered to keep the tension constant and the looseness due to cutting is eliminated.
したがって、ワイヤ駆動装置３の回転駆動によってダイ
ヤモンドワイヤソー５は、コンクリート構造物１を包囲
した状態で無端状態で回転しながら切削しつつ、張力調
整機構４のテンション調整動作によって、順次その切削
深さが大きくなり、最終的にコンクリート構造物１を切
断することになるのである。Therefore, the diamond wire saw 5 is rotated by the wire drive device 3 while being rotated in an endless state while surrounding the concrete structure 1, while the diamond wire saw 5 is sequentially cut by the tension adjusting operation of the tension adjusting mechanism 4. It becomes large and the concrete structure 1 is finally cut.
《発明の効果》 以上実施例によって詳細に説明したように、この発明の
水中構造物の解体用ワイヤソー工法によれば、以下の効
果がある。<< Effects of the Invention >> As described in detail above with reference to the embodiments, the wire saw method for dismantling an underwater structure of the present invention has the following effects.
台船を被切削物である水中コンクリート構造物の近傍に
位置させることができ、これに設けたワイヤ駆動装置と
コンクリート構造物の間でダイヤモンドワイヤソーが無
端状態で回転し、切削作業を行う。台船の揺動によるダ
イヤモンドワイヤソーのテンションの変化あるいは切削
の進行によるダイヤモンドワイヤソーの弛みは張力調整
機構によって解消され、常時一定のテンションを保ちな
がらコンクリート構造物の切削−切断作業が可能とな
る。The pontoon can be positioned near the underwater concrete structure that is the object to be cut, and the diamond wire saw rotates endlessly between the wire drive device provided on this and the concrete structure to perform cutting work. The tension of the diamond wire saw due to the change of the tension of the diamond wire saw due to the rocking of the boat or the slack of the diamond wire saw due to the progress of cutting is eliminated by the tension adjusting mechanism, and the concrete structure can be cut and cut while maintaining a constant tension.
したがって、陸上から遠く離れたコンクリート構造物を
切削するために、ダイヤモンドワイヤソーの長さを長く
する必要がなく、いずれの条件の場所に水中コンクリー
ト構造物があったとしても、台船はこれの近傍に移動で
きるので、ダイヤモンドワイヤソーの径を多少太く設定
しても長さを短くできるため、この工法の最大の問題で
あったダイヤモンドワイヤソーの価格を低く押さえるこ
とができ、安価に実施できる。Therefore, it is not necessary to increase the length of the diamond wire saw in order to cut a concrete structure far away from the land, and no matter what condition the underwater concrete structure is in, the barge will be close to it. Since the diameter of the diamond wire saw can be shortened even if the diameter of the diamond wire saw is set to be slightly larger, the cost of the diamond wire saw, which is the biggest problem of this method, can be kept low and the cost can be reduced.
図はこの発明にかかる水中構造物の解体用ワイヤソー工
法を示す説明図である。 １……水中コンクリート構造物 ２……台船 ３……ワイヤ駆動装置 ４……張力調整機構 ５……ダイヤモンドワイヤソーThe figure is an explanatory view showing a wire saw method for dismantling an underwater structure according to the present invention. 1 ... Underwater concrete structure 2 ... Boat 3 ... Wire drive device 4 ... Tension adjustment mechanism 5 ... Diamond wire saw
Claims (1)
モンドワイヤソーを巻回し、このダイヤモンドワイヤソ
ーを無端回転させることによってコンクリート構造物を
切削する工法において、前記コンクリート構造物の近傍
の水面上を浮游する台船と、この台船上に据え付けられ
たワイヤ駆動装置と動式の張力調整機構とを備え、前記
コンクリート構造物と前記ワイヤ駆動装置との間に前記
ダイヤモンドワイヤソーを巻回し、且つ、前記張力調整
機構を前記ワイヤ駆動装置の前部側で前記ダイヤモンド
ワイヤソーに取付け、前記ワイヤ駆動装置を介して回転
させられる前記ダイヤモンドワイヤソーを前記台船の揺
動および切削の進行度合いに応じて前記張力調整機構に
よって一定のテンションに調整することを特徴とする水
中構造物の解体用ワイヤソー工法。1. In a method of winding a diamond wire saw around a concrete structure provided in water and cutting the concrete structure by rotating the diamond wire saw endlessly, a platform for floating on the water surface in the vicinity of the concrete structure. A ship, a wire driving device installed on the pontoon, and a dynamic tension adjusting mechanism, wherein the diamond wire saw is wound between the concrete structure and the wire driving device, and the tension adjusting mechanism. Is attached to the diamond wire saw on the front side of the wire drive device, and the diamond wire saw rotated by the wire drive device is fixed by the tension adjusting mechanism according to the degree of rocking and cutting of the ship. For dismantling underwater structures characterized by adjusting the tension of Iyaso method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18180788A JPH0751845B2 (en) | 1988-07-22 | 1988-07-22 | Wire saw method for dismantling underwater structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18180788A JPH0751845B2 (en) | 1988-07-22 | 1988-07-22 | Wire saw method for dismantling underwater structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0232810A JPH0232810A (en) | 1990-02-02 |
| JPH0751845B2 true JPH0751845B2 (en) | 1995-06-05 |
Family
ID=16107187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18180788A Expired - Fee Related JPH0751845B2 (en) | 1988-07-22 | 1988-07-22 | Wire saw method for dismantling underwater structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751845B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2554533B2 (en) * | 1988-10-31 | 1996-11-13 | 株式会社ダイモ社 | Overwater wire sawing equipment |
-
1988
- 1988-07-22 JP JP18180788A patent/JPH0751845B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0232810A (en) | 1990-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3321925A (en) | Deep water lay barge and method | |
| US3524326A (en) | Method and means for neutralizing swell during submarine pipeline laying operations | |
| US4441449A (en) | Port ramp for access to a roll-on roll-off ship | |
| US4335803A (en) | Gangway ladder arrangement | |
| US4037421A (en) | Float-on boat docking and lifting assembly | |
| EP0366809B1 (en) | Floating dock adjustable in width | |
| JPH0751845B2 (en) | Wire saw method for dismantling underwater structures | |
| FI60532C (en) | RAMP FOER ETT ROERLAEGGNINGSFARTYG | |
| US4049170A (en) | Device for pulling up and paying out an oil boom | |
| US3350798A (en) | Condition responsive elevator dredge | |
| AU725405B2 (en) | Improvements relating to the laying of underwater pipeline | |
| JP2001088779A (en) | Floating pier for raising and lowering of boat | |
| JPH0751844B2 (en) | Wire saw method for dismantling underwater structures | |
| US4289423A (en) | Protective skirt for an iceberg | |
| CN208650027U (en) | A kind of intercepting system waterborne is small-sized to cross ship access door | |
| CN219192502U (en) | Vehicle passing springboard under applicable sea condition | |
| CA1232296A (en) | Dredge with twin cutter head and suspension therefor | |
| JPH0751846B2 (en) | Wire saw method for dismantling underwater structures | |
| CN114855694B (en) | Dock floating roll-on facility suitable for large tidal range condition and operation method | |
| JPH01131734A (en) | Spud for dredger | |
| CN217104893U (en) | Ecological pier in scenic spot | |
| CN220809715U (en) | Underwater slipper device with drum-shaped wheels and shallow water sliding ship | |
| CN220430418U (en) | Novel ocean engineering positioning anchoring device | |
| CN211223766U (en) | Limiting device for ship windlass | |
| KR20100095805A (en) | Boarding bridge for embarkation andleaving a ship on wharf |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |