Under Different Overload Condition Deep Foundation Pit Structure Computation And Analysis

Deeping excavation and support is an old and who have the characteristics of the times of the geotechnical engineering topics. With the high-rise buildings and tall structures continuous to constuct and develop, deeping foundation pit excavation and support of technology and research have become increasingly important. Many overseas specialists have conducted series of research in this field, Including the theoretical calculation, design methods, measured in situ, indoor model test and made a lot of meaningful results. However, because of Deep Foundation Pit complexity and uncertainty, there is much merit in the field continue to study and improve.This article has conducted the related research and the analysis taking Shenzhen sumptuous Chouyou light underground street hole excavated for building foundation project as the research background, In the summary formerly in research results' foundation, Midas GTS software has carried on the finite element simulation to Shenzhen sumptuous Chouyou light underground street deep pit excavated for building foundation project's piling supports and protections system, when the analysis the soil body, a guard stake and in supports the system to regard as a spatial three dimensional whole, simultaneously had considered the supports and protections structure and the soil body intercoordination function, calculated each kind to excavate under the operating mode the supports and protections system stress and the distortion situationThrough on-site comparison of the measured data analysis:(1),Different overloaded state, foundation pit system of internal forces and deformation of the universal law; For example, the Foundation has overloaded the internal force and deformation than those without overloading larger(2),Through three different overloaded state supporting system of internal forces and deformation of the comparative study ,getting On the one hand obtains the overload on the other hand not to have under the overload most disadvantageous overload condition to support and protect the system endogenic force and the distortion, it will provide certain reference for the next similar project's design and the construction(3),In considering excavation analysis of supporting structure and soil interaction and analyzed the pit excavated for building foundation base to stick out, the surface subsidence problem .Obtained the hole excavated for building foundation base to stick out, the surface subsidence and so on main physical essential factor under the above several kind of different overload condition change ruleIn summary, this thesis has analyzed the response of soils and the behavior of support in the process of excavation by steps. The results acquired by means of numerical simulation are basically consistent with the field data, which shows the method concerned in this thesis is reasonable and that the prediction before construction is proper is also proved. So theoretical basis and guidance are provided to actual engineering and these can contribute to improve the structure design level and safety. Valuable design, construction and scientific research experiences are accumulated and provided to the similar engineering.