Construction method for island mudflat diking

Abstract

The invention discloses a construction method for island mudflat diking. The construction method comprises the following steps of: bottom protection construction, dike foundation construction, dike body construction, outer slope construction, inner slope structure construction, wave wall construction and crest pavement construction, wherein bottom protection construction comprises sand rib soft body mattress laying and interlocking sheet soft body mattress laying, and adopts a laying boat to perform underwater laying; the dike foundation construction comprises performing first-layer continuoussand cushion placing, second-layer continuous sand cushion placing, driving by a drain board and a third-layer continuous sand cushion placing in sequence, wherein during steps from first-layer continuous sand cushion placing to third-layer continuous sand cushion placing, an integrated type construction boat underwater sand pocket filling method is adopted; the dike body construction comprises dike body inner and outer edge construction, and dike core construction; and outer slope construction comprises inclined slope sand rib soft body reverse-filtration drainage construction at elevation lower than 1.5m, and outer slope structure construction. The construction method disclosed by the invention realizes all-around operation and continuous operation; bottom protection is firstly performed, so that an outline is firstly formed; and all-line construction and uniform lifting are taken as the principle, so that construction efficiency can be greatly improved, and diking strength is ensured.

Description

technical field [0001] The invention relates to a construction method of an island shoal embankment. Background technique [0002] In recent years, with the continuous and rapid development of urban construction, the shortage of land resources has become increasingly serious, and the development and utilization of tidal flats has become an important way to open up new land resources. Among them, tidal estuary areas and coastal areas have more enclosure projects. The embankment is an important part of the enclosure project, and the land reclamation will be carried out in the enclosure. The enclosure is mainly carried out by using the tidal flat behind the existing submerged embankment on the island. Although the enclosure area of ​​the enclosure project is not large, the average elevation of the original beach surface before construction is below -5.0 meters, and some parts reach -16.0 meters. The design and construction are more difficult. Large, the height of the new emba...

AI Technical Summary

Problems solved by technology

The enclosure is mainly carried out by using the tidal flat behind the existing submerged embankment on the island. Although the enclosure area of ​​the enclosure project is not large, the average elevation of the original beach surface before construction is below -5.0 meters, and some parts reach -16.0 meters. The design and construction are more difficult. It is a typical deep-water embankment project with a height of more than 12 meters. At the same time, the newly deposited silt layer on the surface is thick, the geological conditions are poor, the surrounding environment of the project is complex, and the working space is narrow. On-site marine equipment The overall layout of the exhibition and construction is greatly restricted

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