Building method for inverted filter of inner side of artificial island riprap mole island wall

Abstract

The invention discloses a building method for an inverted filter of an inner side of an artificial island riprap mole island wall, which comprises the following steps: (1) a layer of two-slab stone is paved on the inner side of the island wall of the artificial island to form a first slope inverted filter; a layer of gravel is paved outside the island wall to form a second slope inverted filter; and then needle-punched composite geotextile is paved; (2) a first layer of big filling bag is paved outside the needle-punched composite geotextile; after the first layer of big filling bag is filled with sand, the mouth of the bag is tightly tied; (3) a second layer of big filling bag is paved on the first layer of big filling bag, and then the process of the step 1 (2) is repeated, the steps are analogized in sequence till a multi-layer big filling bag piling and ramparting back pressure under a normal water line is finished; a multi-layer small filling bag is filed and ramparted above the normal water line till the elevation is 6.8 to 7.2 meters and develops along the length direction of the island wall of the artificial island to finish the whole pilling and ramparting process. The invention increases the building quality of the inverted filter and reduces the building cost.

Description

Technical field [0001] The invention relates to a method for constructing an artificial island, in particular to a method for constructing an anti-leakage back filter layer on the inner side of an island wall of an artificial island riprap levee, and belongs to the technical field of hydraulic engineering. Background technique [0002] Existing artificial islands are generally built near the coast or in shallow sea areas sheltered by islands. They are composed of a closed island wall several meters above the water surface and piled sand filled in the island wall. Such artificial islands cannot be used to build deep-water ports because they are built in shallow waters. To build deep-water ports in some coastal areas lacking deep-water shorelines, it is necessary to rely on artificial islands in the open sea in deep-water areas far away from the coast, with large tidal ranges and rapid high tides, and connect them to land through bridges and pipelines. The artificial island projec...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and convenient construction method for the inverted filter layer. This method overcomes the difficulty that the inverted filter layer cannot be constructed due to the large difference in height between the inner and outer water surfaces of the artificial island wall due to the large tidal range in the open sea.

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