| Cement-soil mixing pile gravity retaining wall structure support in the 20 th century 50’s began to study and the 20 th century 70’s began in the actual foundation pit engineering application has been nearly 50 years of history.It has the advantages of maximizing the utilization of foundation soil,simple construction,small pollution,low construction speed,low noise and low cost.But its support depth is small(alone support does not exceed 7m deep foundation pit),lateral deformation is large and other shortcomings,so generally used in the shallow foundation pit with importance level secondary and tertiary.In recent years,China’s first and second tier cities gradually developed to the high-level development,but the larger number of population more three or four lines of urban construction is still in the direction of high-rise buildings.Cement soil mixing pile gravity retaining wall structure support is still a wide range of applications.At present,the theoretical research work of this support form is lagging behind the actual engineering experience,and the lateral deformation of the support structure is generally relatively large compared with other support methods,so it is of great value to study the support deformation.The main contents of this paper include:(1)The application status of the supporting structure of gravity retaining wall of cement-soil mixing pile,the present situation of deformation of supporting structure,the present situation of post-wall subsidence study,and the present situation of pits in the pit are systematically introduced.(2)Introduction the cement soil mixing pile mechanism,design calculation theory,deformation theory was introduced.(3)Based on Jingzhou Guan Gong Cultural Park residential area foundation pit engineering,simulation of Midas GTS / NX finite element software to verify model rationality。(4)Make sure the model is available,change the parameters,research on different parameters for foundation pit deformation influences. |
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