Deformation control of deep excavation engineering and analysis of factorsinfluencing deformation with finite element method

Deformation control of deep excavation pits is firstly introduced in detail,and new conceptions of effective coefficient,effective area,no-effective area and critical line,including the referential criteria and economic-effective measures of deformation control,have been put forward.The system of the optimized design with deformation control and the numerical simulation with finite element method of deep excavation engineering(SDCDEFEM) is introduced.Factors influencing its deformation are analyzed by the system,the statistic formula estimating maximum deformation and its place have been obtained.