Method for laying geotextile underwater

[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 process of laying geotextiles, the diver pulls on the edges of the geotextiles to flatten the geotextiles, and then evenly press the gravel bags on the geotextiles. The purpose is to prevent the geotextiles from being washed away by water and form a certain amount of running water segment.

[0025] Such as figure 2 As shown, the method for laying geotextiles underwater of the present invention includes the following steps:

[0026] Step 101: Lay the ship along the axis of the embankment (that is, the starting edge line of the geotextile laying on the side of the ship);

[0027] Step 102: Tie up the geotextile roll to be laid with a rope;

[0028] Step 103: Pull the pulley block to lift the geotextile roll;

[0029] Step 104: Lay two positioning steel pipes at a certain distance close to the ship, the distance is preferably 7 meters;

[0030] Step 105: The geotextile roll is slowly put down next to the steel pipe pulley block and enters the water;

[0031] Step 106: The diver puts the geotextile roll to the bottom of the water and presses the edge of the geotextile with a gravel bag, and then instructs the crew on the ship to move the ship to spread the geotextile;

[0032] Step 107: Throw a batch of gravel bags every time the ship moves 4 to 5 meters until the geotextile is finished;

[0033] Step 108: Take back the empty geotextile tube left in the water;

[0034] Step 109: The diver presses the end edge of the geotextile with a gravel bag, and repeats step 101 for subsequent laying.

[0035] By using the geotextile laying method of the present invention, work efficiency can be greatly improved. When laying, GPS is preferably used to determine the sideline and the axis overlap width to meet the design requirements.