Retaining Structure With Monitoring And Numerical Simulation Of Wenzhou Power Administration Foundation-Pit

With the rapid development of city construction, more and more high buildingsappear and underground spaces are explored. So lots of deep foundation projects arebuilt, meanwhile it brings up more problems of deep foundation projects than ever. Asan important issue of Geotechnical engineer, deep foundation project relate to manytechnical fields, such as structural design of project, foundation base, rock-soilmechanics, numerical simulation analysis and environment protection. This thesisregards bracing of foundation pit project of manufacture and emplacement buildings ofWenzhou PUCC as an example to discuss the inner force and deformation features ofPalisade structure during substep excavation. Analytical methods, such as theoreticalanalysis, field monitoring, numerical simulation, are used in this thesis. Main works andconclusion are as follows:(1) To analyze the main features and deformation mechanism of palisade structureof foundation pit and the main factors that affect deformation. Result shows thatintrinsic factors, factors relate to design and construction all will influence deformationof palisade structure;(2) To accomplish the monitoring program of deep foundation palisade project ofWenzhou PUCC’s manufacture and emplacement buildings.(3)To use PLAXIS software to establish two dimension limited element analyticalmode of Wenzhou PUCC’s manufacture and emplacement buildings and conductnumerical simulation for excavation of this foundation pit. Taking real constructionconditions of this foundation pit into consideration to calculate and analyze horizontaldisplacement of soldier pile, inner force and concrete support shaft force and its changepattern. The correctness and reasonableness of this mode are verified after comparingand analyzing the physical test result and simulation result. Simultaneously I use FRWSsoftware to conduct analysis, calculation and comparison, which is designed to exploreadvantages of two software while each is used in foundation pit support calculation. Ialso propose some useful suggestions for design and construction of palisade structure.