Method for laying geotextile underwater

A technology of geotextiles and gravel bags, which is applied in infrastructure engineering, coastline protection, construction, etc., can solve problems such as uneven weight of stones, stone crushing of 1 volume of drainage board, etc., to reduce maintenance frequency, ensure construction quality, The effect of reducing maintenance costs

Active Publication Date: 2009-10-28
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different sizes and weights of the stones, if sand and gravel are directly laid on the d

Method used

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  • Method for laying geotextile underwater
  • Method for laying geotextile underwater

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[0024] The method for laying geotextiles underwater in the present invention preferably adopts the first self-propelled deck barge with a good anchoring system as the laying vessel. The laying vessel has two anchoring systems at the front and rear, and two sets of pulley blocks are equipped on one side of the vessel for lowering to be laid. Geotextile. In addition, a second self-propelled deck barge adjacent to the laying vessel is needed. The second self-propelled deck barge is used to load gravel bags and also serves as a diver's ship. The positioning directions of the two self-propelled deck barges are along the axis of the dike, the middle position of the two ships is the laying of the sideline, and the distance between the two ships is about 0.4m-0.8m, which is just enough to put the geotextile down. After the laying ship is in place, the divers go into the water, and the workers lay down the geotextile rolled up with steel pipes along the side of the ship. During the above p...

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Abstract

The invention provides a method for laying geotextile underwater, which includes steps of: 1. berthing the laying ship along a dike axis; 2, fastening the geotextile to be layed with rope; 3. pulling the pulley set to coil the geotextile; 4. nailing two positioning steel pipes close to the ship edge; 5. putting the geotextile down close to the steel pipes; 6. laying the geotextile coil beneath water, pressing the geotextile edge with a stone bag, then moving the ship; 7. dropping a stone bag upon a determined distance of moving; 8. recycling geotextile tube in the water; 9. pressing the terminal edge of the geotextile with a stone bag, and laying the next block of geotextile. The method for laying geotextile underwater is capable of uniformly distributing gravity onto the draining board of the lower layer, and the phenomenon of draining board break due to partially bearing too much force. The method for layer geotextile underwater is further capable of effectively reducing maintenance frequency of the outer port channel, so as to reduce maintenance cost of the port.

Description

technical field [0001] The invention relates to an underwater construction method, in particular to a method for laying geotextiles underwater. Background technique [0002] Such as figure 1 As shown, in the improvement project of preventing sediment deposition in the outer channel of the port, it is usually necessary to lay the drainage board 1 first on the breakwater foundation, and then lay the sand and gravel cushion. However, due to the uneven size and uneven weight of the stones, if sand and gravel are directly laid on the drainage board 1, the drainage board 1 may be crushed by larger and heavier stones in a local area. Therefore, it is necessary to lay a layer of geotextiles such as geotextiles 2 before laying sand and gravel cushions (usually the unit mass of geotextiles laid is ≥ 700g / m 2 ; longitudinal ultimate tensile force ≥ 200KN / m; latitudinal ultimate tensile force ≥ 120KN / m; joint strength ≥ 40KN; friction coefficient with sand ≥ 0.6), and then lay a sands...

Claims

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Application Information

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IPC IPC(8): E02B3/06E02D15/00
Inventor 刘凤松顾大钊石月亮曹华武于建海
Owner CHINA SHENHUA ENERGY CO LTD
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