JP3069822B2 - Installation method of intake water discharge pipe - Google Patents
Installation method of intake water discharge pipeInfo
- Publication number
- JP3069822B2 JP3069822B2 JP5291535A JP29153593A JP3069822B2 JP 3069822 B2 JP3069822 B2 JP 3069822B2 JP 5291535 A JP5291535 A JP 5291535A JP 29153593 A JP29153593 A JP 29153593A JP 3069822 B2 JP3069822 B2 JP 3069822B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- dredging
- guide rail
- water discharge
- discharge pipe
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、火力発電所や原子力発
電所等において、海底埋設式の取水路又は放水路となる
取水放水管を据え付ける工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a water intake / discharge pipe which is a submarine buried intake or discharge channel in a thermal power plant or a nuclear power plant.
【0002】[0002]
【従来の技術】遠浅の海域で取水路又は放水路を施工す
る場合、図7に示すように、鋼管、鋳鉄管、コンクリー
ト管などの管体1を、陸上部から海底部にかけて所要の
水深まで埋設することが多い。通常、この場合の管体1
の据え付けには、従来次のような方法が採られていた。
なお、図7において2は取水口部、3はポンプピット、
4は護岸壁である。2. Description of the Related Art When an intake channel or a discharge channel is constructed in a shallow sea area, as shown in FIG. 7, a pipe 1, such as a steel pipe, a cast iron pipe, or a concrete pipe, is brought to a required water depth from the land to the sea bottom. Often buried. Usually, the tube 1 in this case
Conventionally, the following method has been adopted for installation.
In addition, in FIG. 7, 2 is an intake port, 3 is a pump pit,
4 is a revetment wall.
【0003】 海底を浚渫後、管体を海上より吊り降
ろし、潜水夫が海中で管体同士を継手連結して海底に敷
設してから埋め戻す。陸上部分は開削して埋設する。
海底を浚渫後、仮設ドック等で管体を連結し、海上に
浮上させたまま現地へ運搬し、注水しながら沈設して埋
め戻す。陸上部分は開削して埋設する。[0003] After dredging the seabed, the pipe is suspended from the sea, and a diver connects the pipes together in the sea, lays them on the seabed, and then buries them. The land part is cut and buried.
After dredging the seabed, pipes are connected by a temporary dock, etc., transported to the site while floating above the sea, and sunk and filled back while pouring water. The land part is cut and buried.
【0004】[0004]
【発明が解決しようとする課題】しかし、これらの方法
は、海上部での施工時間が長く、波浪の影響を受けるた
め、施工時期を選ばなければならないことから、工期が
長くなる。また、陸上部分については開削して埋設する
ため、止水工や土留め工や既設物の撤去・復元工事等の
多くの労力を要する付帯工事が多く、工費が高くなる問
題があった。However, in these methods, the construction time is long at the sea, and the waves are affected, so that the construction time has to be selected, so that the construction period becomes long. In addition, since the land part is cut and buried, there are many incidental works that require a lot of labor, such as water stoppage work, earth retaining work, removal and restoration work of existing structures, and there has been a problem of high construction costs.
【0005】本発明の目的は、従来に比べて、海上での
作業を低減できるばかりでなく、陸上作業については作
業数を大幅に削減でき、施工性や工期や工費の面で格段
に有利な取水放水管の据付工法を提供することである。An object of the present invention is to not only reduce the number of operations on the sea, but also to greatly reduce the number of operations on land compared with the prior art, which is significantly advantageous in terms of workability, construction period and cost. The purpose of the present invention is to provide an installation method for intake water discharge pipes.
【0006】[0006]
【課題を解決するための手段】本発明では、陸地に立坑
を掘削するとともに、海底を部分的に浚渫し、管体を順
次連結しながら管体内に水を入れた状態で推進貫入させ
て浚渫領域まで押し出した後、この浚渫領域を埋め戻
す。According to the present invention, a shaft is excavated on land, and the seabed is partially dredged, and while the pipes are sequentially connected, water is poured into the pipes to protrude and dredge them. After extruding to the area, backfill this dredged area.
【0007】浚渫領域にガイドレールを敷設し、このガ
イドレールに沿って管体を浚渫領域に押し出すと良い。[0007] A guide rail may be laid in the dredging area, and the pipe may be pushed out to the dredging area along the guide rail.
【0008】[0008]
【作用】本発明によれば、管体の据付及び連結を陸上か
ら行え、海上での作業は、海底の浚渫とその埋め戻しと
ガイドレールの据え付けという簡単な作業のみとなる。
また、陸上での作業は、立坑の掘削、立坑内への反力壁
の設置及び推進ジャッキの取り付け、管体の貫入・連結
で済む。管体を浚渫領域に押し出すとき、ガイドレール
に沿って推進させれば、海底に正確に設置できる。ま
た、その際に、浮力にバランスした水を管内に水を入れ
ておけば、ジャッキの推力を減ずることができる。According to the present invention, the installation and connection of pipes can be performed from land, and the work on the sea is only a simple work of dredging the seabed, backfilling it, and installing the guide rail.
In addition, work on land requires only excavation of the shaft, installation of reaction walls in the shaft, installation of propulsion jacks, and penetration and connection of pipes. When the pipe is pushed into the dredging area, it can be accurately installed on the sea floor if it is propelled along the guide rail. Also, at that time, if the water balanced with the buoyancy is filled in the pipe, the thrust of the jack can be reduced.
【0009】[0009]
【実施例】以下、本発明による工法の一例を図面に従っ
て説明する。図1に示すように、先ず陸地10に立坑1
1を掘削した後、図2に示すように、この立坑11内に
反力壁12を設けてこれに推進ジャッキ(油圧ジャッ
キ)13を取り付け、またその反対側に貫入案内管14
を設置する。この後、鋼管、鋳鉄管、コンクリート管な
どの管体15を地上から吊り降ろして、立坑11内での
連結と、推進ジャッキ13による推進を繰り返して貫入
案内管14を通じて順次貫入していく。この場合、管体
15同士の連結はフランジ継手により行うことができる
が、鋼管であれば、溶接により行えるので、工事費が割
安になる。BRIEF DESCRIPTION OF THE DRAWINGS FIG. As shown in FIG.
After excavation, as shown in FIG. 2, a reaction wall 12 is provided in the shaft 11, a propulsion jack (hydraulic jack) 13 is attached thereto, and a penetrating guide pipe 14 is provided on the opposite side.
Is installed. Thereafter, a pipe 15 such as a steel pipe, a cast iron pipe, or a concrete pipe is hung from the ground, and the connection in the shaft 11 and the propulsion by the propulsion jack 13 are repeated to sequentially penetrate through the penetrating guide pipe 14. In this case, the pipes 15 can be connected to each other by a flange joint. However, in the case of a steel pipe, the connection can be performed by welding, so that the construction cost is relatively low.
【0010】管体15の先端の刃口部16が海底17に
届くところまで貫入したところで、この刃口部16を仮
蓋18で閉塞して海水が管体15内に入り込まないよう
にしてから、それより先の海底を管路の設置計画線に沿
って所要範囲だけ浚渫し、例えば図6に示すような浚渫
溝19を作る。浚渫した海岸部分は捨石20等で護岸し
ておく。When the blade 16 at the tip of the tube 15 has penetrated to the point where it reaches the seabed 17, the blade 16 is closed with a temporary cover 18 to prevent seawater from entering the tube 15. Then, the seabed ahead is dredged by a required range along the pipeline installation planning line, and a dredging groove 19 as shown in FIG. 6 is formed, for example. The dredged coastal area is protected by rubble 20 and the like.
【0011】次に、浚渫溝18に図4及び図6に示すよ
うにガイドレール21を敷設し、立坑11内で更に管体
15の連結と推進を繰り返して、図4に示すように、海
底17上では管体15をガイドレール21に沿って推進
させる。この場合、管体15内に水を入れた状態で推進
させ、海中での浮力を相殺してガイドレール21に作用
する荷重を調節する。ガイドレール21は、管体15を
安定状態で真っ直ぐしかもスムーズに案内できるよう
に、図6に示すように、ベース22上に2本平行に敷設
し、しかもガイドレール21の上面を摩擦係数の小さい
素材による円弧面とする。Next, a guide rail 21 is laid in the dredging groove 18 as shown in FIGS. 4 and 6, and the connection and propulsion of the pipe body 15 are further repeated in the shaft 11, and as shown in FIG. On 17, the tube 15 is propelled along the guide rail 21. In this case, the propulsion is performed in a state where water is contained in the pipe body 15, and the buoyancy in the sea is offset to adjust the load acting on the guide rail 21. As shown in FIG. 6, two guide rails 21 are laid in parallel on a base 22 so that the pipe 15 can be guided straight and smoothly in a stable state, and the upper surface of the guide rail 21 has a small coefficient of friction. The arc surface is made of a material.
【0012】図5に示すように、管体15の先端の刃口
部16が設計地点に達したならば、その先端の仮蓋18
を取り外して取水口部23を設置し、浚渫溝18を土砂
(砕石等でも良い)24で埋め戻して管体15を海底に
埋設する。ガイドレール21は埋め殺しとする。立坑1
1は完全に埋め戻ししないで、ポンプピットとして利用
できる。As shown in FIG. 5, when the cutting edge 16 at the tip of the tube 15 reaches the design point, the temporary lid 18 at the tip is
Is removed, an intake 23 is installed, and the dredging groove 18 is backfilled with earth and sand (crushed stone or the like) 24 to bury the pipe 15 on the seabed. The guide rail 21 is to be buried. Shaft 1
1 can be used as a pump pit without completely backfilling it.
【0013】なお、上記の実施例では、海底の浚渫を、
海岸部分より取水口部23の設置箇所まで連続して行っ
たが、その一部の箇所だけ行っても良い。また、本発明
は海水の取水路に限らず、海域への放水路、更に海域に
限らず湖沼での取水路又は放水路にも適用できる。In the above embodiment, the dredging of the seabed is
Although the operation was performed continuously from the shore to the installation location of the water intake 23, the operation may be performed only in a part of the area. Further, the present invention is not limited to the seawater intake channel, but can be applied to a waterway to a sea area, and further to a waterway or a waterway in a lake, not limited to the sea area.
【0014】[0014]
【発明の効果】本発明によれば次のような効果がある。
管体の据付及び連結を陸上から行え、海上での作業
は、海底の浚渫とその埋め戻しとガイドレールの据え付
けという簡単な作業のみとなり、また陸上での作業は、
立坑の掘削、立坑内への反力壁の設置及び推進ジャッキ
の取り付け、管体の貫入・連結で済むので、従来に比べ
て、海上での作業を低減できるばかりでなく、陸上作業
については作業数を大幅に削減できるので、施工性や工
期や工費の面で格段に有利である。 ガイドレールを
敷設した後は陸上での作業のみとなるので、波浪に影響
されず、工事工程が立て易い。 管体の継手工を陸上
で施工できるため、品質の良い確実な継手構造にでき、
特に鋼管の場合、溶接継手が可能になるので、フランジ
継手を用いる場合より工事費が割安になる。 管体の
重量に応じてその内部に水を入れ、浮力に釣り合わせる
ことができるので、ジャッキ推力を減ずることができる
とともに、ガイドレールに沿って押し出す場合には、ガ
イドレールに作用する荷重を調節できる。According to the present invention, the following effects can be obtained.
The installation and connection of pipes can be performed from the land, the work on the sea is only the simple work of dredging and backfilling the seabed and installing the guide rails, and the work on the land is
Excavation of the shaft, installation of reaction walls in the shaft, installation of propulsion jacks, and penetration and connection of pipes are all that is required. Since the number can be greatly reduced, it is extremely advantageous in terms of workability, construction period and construction cost. After the guide rails are laid, only work on land is required, so that it is not affected by waves and the construction process is easy to set up. Since pipe joints can be constructed on land, high quality and reliable joint structures can be achieved.
In particular, in the case of steel pipes, since welding joints are possible, the construction cost is lower than in the case of using flange joints. According to the weight of the tube, water can be poured into the tube and balanced with the buoyancy, reducing the jack thrust and adjusting the load acting on the guide rail when pushing out along the guide rail. it can.
【図1】本発明による工法の一実施例において立坑を掘
削した状態を示す図である。FIG. 1 is a view showing a state where a shaft is excavated in an embodiment of a construction method according to the present invention.
【図2】立坑から管体を貫入案内管に沿って発進させて
いる状態を示す図である。FIG. 2 is a diagram showing a state in which a pipe is started from a shaft along a penetrating guide pipe.
【図3】海底を浚渫し、管体の先端の刃口部を仮蓋で閉
塞した状態を示す図である。FIG. 3 is a view showing a state in which the seabed is dredged, and a cutting edge at the tip of a pipe is closed with a temporary lid.
【図4】浚渫したところにガイドレールを敷設し、これ
に沿って管体を推進させている状態を示す図である。FIG. 4 is a diagram showing a state in which guide rails are laid at places where dredging is performed, and a pipe is being propelled along the guide rails.
【図5】浚渫したところを埋め戻し、管体の先端に取水
口部を設置した状態を示す図である。FIG. 5 is a view showing a state in which the dredged portion is backfilled and an intake port is installed at the tip of the pipe.
【図6】浚渫箇所の断面とガイドレールの敷設構造を示
す図である。FIG. 6 is a diagram showing a cross section of a dredging point and a laying structure of a guide rail.
【図7】遠浅の海域での一般的な取水構造を示す図であ
る。FIG. 7 is a diagram showing a general water intake structure in a shallow water area.
10 陸地 11 立坑 12 反力壁 13 推進ジャッキ 14 貫入案内管 15 管体 16 刃口部 17 海底 18 仮蓋 19 浚渫溝 20 捨石 21 ガイドレール 22 ベース 23 取水口部 24 土砂 DESCRIPTION OF SYMBOLS 10 Land 11 Vertical shaft 12 Reaction wall 13 Propulsion jack 14 Penetration guide tube 15 Pipe 16 Blade opening 17 Sea bottom 18 Temporary lid 19 Dredging groove 20 Ripstone 21 Guide rail 22 Base 23 Water intake 24 Soil and sand
Claims (2)
分的に浚渫し、管体を順次連結しながら管体内に水を入
れた状態で立坑から推進貫入させて浚渫領域まで押し出
した後、この浚渫領域を埋め戻すことを特徴とする取水
放水管の据付工法。A pit is excavated on land, and the seabed is partially dredged. After water is inserted into the pipe while the pipes are sequentially connected, the water is put into the pipe and propelled from the pit to be extruded to a dredging area. A method for installing an intake water discharge pipe, which is to fill back the dredged area.
イドレールに沿って管体を浚渫領域に押し出すことを特
徴とする請求項1に記載の取水放水管の据付工法。2. The installation method for an intake water discharge pipe according to claim 1, wherein a guide rail is laid in the dredging area, and the pipe is pushed out to the dredging area along the guide rail.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5291535A JP3069822B2 (en) | 1993-10-28 | 1993-10-28 | Installation method of intake water discharge pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5291535A JP3069822B2 (en) | 1993-10-28 | 1993-10-28 | Installation method of intake water discharge pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07127042A JPH07127042A (en) | 1995-05-16 |
JP3069822B2 true JP3069822B2 (en) | 2000-07-24 |
Family
ID=17770166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5291535A Expired - Fee Related JP3069822B2 (en) | 1993-10-28 | 1993-10-28 | Installation method of intake water discharge pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3069822B2 (en) |
-
1993
- 1993-10-28 JP JP5291535A patent/JP3069822B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07127042A (en) | 1995-05-16 |
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