Construction method for dredging backward by cutter suction vessel

Abstract

The invention relates to a construction method for dredging backward by a cutter suction vessel. When a construction area is greater than the length of a construction vessel body and the dredging depth is greater than the length of a positioning steel pile, the construction area is divided into a plurality of sections of areas for dredging and the dredging length of each section is ensured to be less than the construction safety length of the construction vessel body according to the length of the construction area and the length of the construction vessel body; the positioning steel pile is ensured not to enter a deep water area; the construction area is subjected to a dredging operation by operating an anchor boat, an anchor, a dredge pump, the positioning steel pile, an auxiliary steelpile, a reamer, a winch, a trolley and a bridge frame; and the last section of the construction area is dredged, then the second section from the last is dredged and so on in a similar fashion by performing the operations of calculating, positioning, placing the reamer, transversely moving and dredging, reversing at a side boundary, knocking down the pile, moving the anchor and moving the vessel.The invention provides the construction method for dredging backward by the cutter suction vessel; and a riverway is dredged through the construction method of dredging backward, so that the problem that the construction vessel body cannot be positioned for constructing well in the area with large dredging depth because the steel pile is short is solved.

Description

technical field [0001] The invention relates to the related technical field of dredging engineering, in particular to a construction method for dredging with a cutter suction ship. Background technique [0002] Due to changes in the ecological environment and soil erosion causing siltation in rivers and lakes, a large number of dredging construction ships are required to dredge rivers, develop shipping and control floods. [0003] At present, when cutter suction dredging construction ships are working in deep water areas, they often encounter the problem that the positioning steel piles are short and the digging depth is large. As the excavation progresses, the positioning steel piles cannot be inserted into the mud on the seabed, and the construction of the hull cannot be achieved. The positioning made it impossible to construct, and also prevented the hidden danger of the positioning steel pile falling off and entering the deep water area. Contents of the invention [0...

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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a construction method of step-back dredging by a cutter-suction ship, through which the river channel is cleared of silt, and the short steel piles cannot be used for construction in areas with large digging depths. The problem of good positioning of the hull

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