Abstract Considering the inclination monitoring data of retaining structures, a comparative analysis on the com? monly used curve-fitting based multiple back analysis methods was carried out for retaining structure deformation/internal force (bending moment) and their effects. Furthermore, a back-analysis of shear force is put forward. The research results show that it is reliable to obtain the results of internal force (bending moment, shear force) by means of back analysis of the retaining structure based on fitting deformation curves by the smooth spline and least square method. Meanwhile, the feasibility, range of application, suggested values of the fitting parameters and serviceability of those two methods are discussed according to the actual measurement data of a foundation pit project in Ningbo. It is possible to accurately control the internal force state of the retaining structure by comparing the back-analysis results of internal force with the ultimate bearing capacity of the retaining structure, which provides technical support for the dynamic safety risk assessment of subway deep foundation pit engineering.
Abstract：
Considering the inclination monitoring data of retaining structures, a comparative analysis on the com? monly used curve-fitting based multiple back analysis methods was carried out for retaining structure deformation/internal force (bending moment) and their effects. Furthermore, a back-analysis of shear force is put forward. The research results show that it is reliable to obtain the results of internal force (bending moment, shear force) by means of back analysis of the retaining structure based on fitting deformation curves by the smooth spline and least square method. Meanwhile, the feasibility, range of application, suggested values of the fitting parameters and serviceability of those two methods are discussed according to the actual measurement data of a foundation pit project in Ningbo. It is possible to accurately control the internal force state of the retaining structure by comparing the back-analysis results of internal force with the ultimate bearing capacity of the retaining structure, which provides technical support for the dynamic safety risk assessment of subway deep foundation pit engineering.
WANG Ye-Sheng- Chen-Wen-Hua- Wu- Yong- Huang-Jiang-Hua
.Back-Analysis on the Retaining Structure Deformation/Internal Force of a Subway Deep Foundation Pit[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(5): 71-77
2016, Vol. 53 