Underwater geotextile fabric laying method

Abstract

The invention relates to an underwater geotextile fabric laying method and belongs to a coastal engineering building construction technology. The underwater geotextile fabric laying method the following steps of: surveying geological geomorphology and hydrometeorology conditions; planning to determine a laying position; carrying out GPS (Global Positioning System) positioning, intelligent control, basal plane obstacle clearing, error correction, splicing and shipping of underwater geotextile fabrics, sand bag in-place placement and drum put-down; fixing an anchor position; carrying out moving spreading, bag pressing and riprapping; and dumping broken stones. By one set of laying operation method, a construction process flow and a safety quality guarantee system, the difficult problem of laying the underwater geotextile fabrics is well solved, floating drifting of the geotextile fabrics is effectively prevented and the geotextile fabrics are smoothly laid without being wrinkled. Stable construction and all-weather normal operation can be ensured in the environment with a water depth of 2 to 20m, a flow rate of 0 to 3m / s, a tidal range of less than or equal to 9m, a wind force of less than or equal to 7 grades and wave power of less than or equal to 2 grades. Moreover, the underwater geotextile fabric laying method has the characteristics of accuracy for positioning, small error, high quality, low cost and high efficiency.

Description

technical field [0001] The invention relates to a method for laying geotextiles underwater, which belongs to the construction technology of coastal engineering buildings. Background technique [0002] my country's coastline is tortuous and long, and it is one of the countries with the longest coastline and the largest tidal flat area in the world. The total length of mainland coastline and island coastline is 32000km. Among them, the mainland coastline starts from the mouth of the Yalu River in the north and ends at the mouth of the Beilun River in the south, with a total length of 18,000km. my country's existing tidal flat area is about 217×10 4 km 2 . The continental coastal area reaches 35×10 4 km 2 , the area of ​​the supratidal zone is about 10×10 4 km 2 , tidal flats 2×10 4 km 2 , 0~5m isobath area 2.7×10 4 km 2 , and the rest are sea areas below the 5m isobath. The resource environment of the coastal zone is an important material basis for the economic an...

AI Technical Summary

Problems solved by technology

2) The geological conditions are complex: due to the different geological conditions of different projects, the underwater terrain in the same project is also uneven, and sometimes there are underwater obstacles, which put forward high requirements for deepwater geotextile laying equipment

3) High requirements for floating positioning: due to the laying of geotextiles in deep water, conventional methods cannot be used for lofting and positioning in general, and floating positioning must be used for the entire laying process

[0006] The above-mentioned adverse effects constitute considerable technical difficulties

In the past, the method of paving directly into the water on the hull deck easily caused the geotextile to be floated and folded, and sometimes it was washed away by the water to cause losses

Unable to meet the safety and quality requirements of underwater construction, there is no advanced and reliable method, which has always been an urgent problem to be solved in coastal engineering

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