Grid cage against coastal erosion and construction method thereof

Abstract

The invention discloses a grid cage against coastal erosion and a construction method of the grid cage. The grid cage comprises geogrids, the bottom ends of the geogrids are fixed in seabed soil, geotextiles are arranged in the geogrids, and the geogrids are connected through geotechnical ties. The construction method comprises the following steps that (a) geological exploration is carried out, and a grid cage arrangement route is determined; (b) the geotextile are bound on the inner sides of the geogrids to form a single geogrid cage; (c) a valve cage shoe is fixed on the inner edge of a gridcage sleeve mould and pressed into the seabed soil; (d) the grid cage is vertically lifted, positioned and pressed into the grid cage sleeve mould, and is pulled out after being arranged; (e) adjacent grid cages on the lowest water level line are bound; and (f) the steps (c)-(e) are repeated till the coast line to be protected is fully covered. The grid cage is low in engineering cost, good in corrosion resistance and aging resistance and fast and convenient to construct, and the flexible grid cage can be suitable for arbitrary buckling coast lines and has strong engineering adaptability.

Description

technical field [0001] The invention relates to the technical field of coastal erosion protection, in particular to a grid cage for coastal erosion protection and a construction method thereof. Background technique [0002] Since the end of the 1950s, my country's sandy coasts and delta coasts have been eroded. By the 1970s and 1980s, coastal erosion has become a common phenomenon and is showing an increasing trend. At present, the scope of coastal erosion in my country is gradually expanding, the erosion rate is relatively high, and the total amount of erosion continues to increase. For example, the erosion range of the abandoned Yellow River Delta in Jiangsu shows a trend of moving southward. In the past, it was a silted or stable coast, but now it has become a severely eroded coast section. Another example is Hebei. In the past, only part of the coast was eroded. Now, whether it is the mud bank in the south, the sand bank in the north or the Luan River delta, erosion and...

AI Technical Summary

Problems solved by technology

Existing coastal erosion protection technologies, such as gravity retaining walls, buttress retaining walls and cantilever retaining walls, all have problems such as high cost, long construction period, poor corrosion resistance in seawater environments, and self-heaviness.

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