Sandbeach-staying-waiting construction method of cutter suction dredger

Abstract

The invention relates to a sandbeach-staying-waiting construction method of a cutter suction dredger. The sandbeach-staying-waiting construction method is characterized by including the steps that a dredger pit area without hard foreign matter is selected, and the cutter suction dredger is sailed to a soil taking area to excavate a dredger pit when the sea level meets the drafting condition; when the water depth can not meet the drafting condition, the cutter suction dredger stays on a sandbeach and is stranded to wait till the sea level rises again; after the water depth meets the requirement and the cutter suction dredger floats, excavation of the dredger pit is conducted again till the dredger pit with the depth and the area meeting requirements is excavated. Compared with the prior art, the sandbeach-staying-waiting construction method has the advantages that the time spent on entering and exiting of the dredger and pipe disassembling is saved, excavation of the dredger pit can be completed only through two days and four tides, construction efficiency is greatly improved compared with a conventional construction method, the structure of the dredger is not influenced by sandbeach staying waiting construction, and economic benefits are quite remarkable.

Description

technical field [0001] The invention relates to a construction method of a cutter suction dredger waiting on the beach. Background technique [0002] The draft of a large cutter suction dredger can reach 3.6-3.8m. During normal construction, the water depth in the soil borrowing area must meet the normal draft requirements of the ship. In recent years, with the rise of coastal land reclamation projects, the working conditions of cutter suction ship construction have become more and more complicated. The working conditions of shallow water depth in the borrow area are often encountered during construction, and even wetlands occur at low tide. It simply cannot meet the water depth requirements for normal construction of ships. For this reason, ship construction needs to wait for the tide to enter the construction point, excavate the ship nest when the tide level meets the draft, and retreat to a deeper water depth in time if the water level is insufficient. Due to the small ...

AI Technical Summary

Problems solved by technology

Due to the small range of water depth changes in muddy tidal flats, the range of low-tide exposed beaches is relatively large (up to 5 kilometers), and large cutter suction dredgers are non-self-propelled dredgers, and access to the soil borrowing area must rely on auxiliary ships ( Anchor boats, tugboats), and the distance of entry and exit is long and time-consuming. According to the normal draft requirements of the ship, the tide level that can be constructed in one day is only 1-2 hours. It generally takes dozens of times to excavate a ship nest that meets the draft requirements. The repeated entry and exit of the ship can only be completed, and frequent assembly and disassembly of water pipelines and entry and exit of soil borrowing areas are required. The effective utilization rate of ships is very low, and there may be safety hazards if the time calculation is not accurate.

If other types of ships are used to dig out the ship's position, it will take dozens of days, which is uneconomical

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