| Along with the vigorous development of the highway, railway construction,highway or railway bridge in recent years, more and more needs across a river or bay,so there are more and more deep water foundation construction. The decisive factorsin the success or failure of the deep foundation engineering and safety is how toconstruct a reasonable underwater temporary structures and the reasonableconstruction scheme, and larsen steel sheet pile with its high strength, goodwaterproof, reusable, without being limited by the shape of cofferdam and othercharacteristics, widely used in deep foundation cofferdam construction.In this paper, the haihe river bridge2#pier steel sheet pile cofferdam for theengineering background. Through the analysis of the force situation of steel sheet pilecofferdam research, preliminary to support set inside the steel sheet pile cofferdamscheme, using Midas/civil to different schemes for the support, through the simulationresults to determine the reasonable layout of support system.According to the scheme of support system layout, combined with theconstruction site conditions, simulation studies on the layout of the constructionconditions, by analyzing the working condition of each construction in steel sheet pilebody of deformation and stress distribution and wai purlin and stress distribution anddeformation of support in, formulates the corresponding construction scheme,determine the reasonable construction sequence and construction methods, guaranteethe construction smoothly.Through the field monitoring in steel sheet pile displacement, stress and axialforce are supported to comply with relevant regulations, showed that of the steel sheetpile cofferdam construction scheme has the stability and safety, and the feasibility ofthe support layout scheme. Simulation results and monitoring results are basicallyconsistent, which shows that the analysis model created by the finite element softwareMidas/civil is reasonable and reliable parameters selection, so as to provide abeneficial reference for the similar engineering. |
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