Research on Siltation Layer and Boulder Cleaning Technology for Steel Cofferdam Foundation Trench in Deep Water Environment
Taking No.1 guide shaft of a highway bridge's anti-collision facility engineering as the engineering ex-ample,this paper analyzes the siltation layer and boulder cleaning technology for the steel cofferdam foundation trench of the guide shaft.In the deep water environment,the steel cofferdam foundation trench siltation layer and boulder cleaning construction will be affected by the change of the reservoir water level,the project faces the risk of deep water construction,and it is necessary to sci-entifically formulate an effective construction scheme to remove the siltation layer through mechanical excavation,clam shell dredger cleaning,blasting compaction and suction equipment,to avoid the influence of riverbed ac-cumulation and large boulder on the stability of the foun-dation trench,and to ensure the smooth sinking of the steel cofferdam and the formation of the foundation trench.
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