Dredging system for offshore deepwater laid gravel bed surface and dredging vessel

Abstract

The invention discloses a dredging system for an offshore deepwater laid gravel bed surface. The dredging system comprises a dredging mechanism, a lifting mechanism and a moving mechanism, wherein thedredging mechanism comprises a dredging sucker, a power part and a dredging pipeline, the dredging sucker is connected with the dredging pipeline, the dredging pipeline is communicated with the powerpart, the dredging sucker comprises at least one ridge-surface suction mouth and at least one furrow suction mouth, and the openings of the furrow suction mouths are lower than those of the ridge-surface suction mouths; the lifting mechanism is connected with the dredging sucker and used for lifting the dredging sucker to the gravel bed surface; and the moving mechanism is connected with the lifting mechanism and used for driving the dredging sucker to move within the dredging range of the gravel bed surface. By application of the dredging system for the offshore deepwater laid gravel bed surface, as the dredging sucker comprises the ridge-surface suction mouths and the furrow suction mouths, sludge on the top surfaces of the gravel ridges and sludge at the furrow between the two gravel ridges can be sucked simultaneously, the dredging quality of the gravel bed surface is guaranteed, and the working efficiency is improved. The dredging system is simple in structure, convenient to useand good in dredging effect.

Description

technical field [0001] The invention relates to the field of underwater engineering, in particular to a desilting system and a dredging ship for the bed surface of gravel foundation in deep water in open sea. Background technique [0002] In the construction of submarine immersed tube tunnels, multiple immersed pipe joints are placed one by one on the surface of the underwater crushed stone bed. The accumulation of submarine silt on the crushed stone bed will change the mechanical characteristics of the crushed stone bed and affect the force transmission of the bed structure. As a result, the immersed tube section cannot effectively contact the crushed stone bed surface. When placing the immersed tube section, it is necessary to carry out dredging operations on the crushed stone bed surface at the place where it is placed to prevent the immersed tube section from being placed on the silt and causing pipe The abnormal subsidence of the joint cannot be connected with the adjac...

AI Technical Summary

Problems solved by technology

[0003] In order to efficiently lay the bottom gravel bed surface, the existing mechanical operation ship throws the riprap pipe into the bottom of the water as the surface area and moves the riprap pipe while throwing stones as the surface area, laying a zigzag gravel ridge bed surface, There is a ditch between two adjacent gravel ridges, and it is difficult for the traditional dredging system to efficiently remove the silt in the ditch

Images