| An reasonable supporting scheme always through continuous optimization, tooptimization a suitable supporting scheme first step is selcting preferred supportingform, and then optimize the form detail; The main work of this paper issystemic discussed of every steps in designing deep foundation pit project, Analyzingthe existing forms of deep foundation support and their characteristics and Summarizethe calculation methods of foundation pit analysis the selection of relevant theoretical.Working out suitable construction parameters for the selected supporting; Analysis thedeformation of excavation supports structure after finishing escave according to themonitoring data and numerical simulation software analysis processing function. Drawrelevant conclusions according to the theory of design, site monitoring, numericalsimulation is between the three mutual authentications.On this basis, unifing the specific site conditions and requirements of a deepexcavations engineering in Beijing Olympic Village, analyzed the above various facetsand gave the conclusions:[1] First step is select three feasible support forms by comparing the similarprojects.Application of analytic hierarchy process in the process of supporting schemesoptimization in foundation pit, optimized out the suitable retaing form Composite soilnailing wall with soldier pile.[2] Design parameters details according to the classical theory， Ultimatelyreview on the stability of foundation pit by LIZHENG software and necessary with sitemonitoring, and mainly comparised the displacement of soldier pile, the result agreedwith experimental data.[3] The maximum displacement of supporting pile in upper of pile middleposition according to the dynamic monitoring data and the maximum displacementmeet the requirements of relevant codes. The finite element analysis softwareMida/GTS draw the same results, effectively guidance to the construction, provide agood reference for the engineering optimize design. |
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