The objective of this study is to investigate the 3D behavior characteristics of an excavation supported by an innovative prestressed support(IPS)earth retention system.A numerical simulation was conducted in order to...The objective of this study is to investigate the 3D behavior characteristics of an excavation supported by an innovative prestressed support(IPS)earth retention system.A numerical simulation was conducted in order to provide insight into the IPS system behavior by using the FLAC3D package.Prior to the parametric study,validation work was conducted by means of a comparison of the deformation between thefield test data and numerical analysis results,and strong agreement was obtained.The reasonable excavation location,lay-ered excavation thickness,and blocked excavation sequence are presented according to variable parameter analysis.In view of the pre-viousfindings,certain measurements are proposed in order to control the foundation pit deformation.The results indicate that prestress compensation has a significant effect on the IPS system behavior,while an optimized excavation sequence slightly improves its behavior.With the conclusion proposed based on the numerical results,the aim is to provide reference data for optimization design and the construction sequence.展开更多
基金undertaken with sup-port from National Nature Science Foundation of China(No.51009054)Jiangsu Province Nature Science Founda-tion of China(No.bk2010513)+3 种基金China funding Science and Technology Project of POWERCHINA Huadong Engi-neering Corporation Limited(SD2013-10)the Water Resource Science and Technology Innovation Program of Guangdong Province(2015-17)the Fundamental Research Funds for the Central Universities of China(D2171820)Major project research funding of the Science and Technology of the Ministry of Education of China(No.109077).
文摘The objective of this study is to investigate the 3D behavior characteristics of an excavation supported by an innovative prestressed support(IPS)earth retention system.A numerical simulation was conducted in order to provide insight into the IPS system behavior by using the FLAC3D package.Prior to the parametric study,validation work was conducted by means of a comparison of the deformation between thefield test data and numerical analysis results,and strong agreement was obtained.The reasonable excavation location,lay-ered excavation thickness,and blocked excavation sequence are presented according to variable parameter analysis.In view of the pre-viousfindings,certain measurements are proposed in order to control the foundation pit deformation.The results indicate that prestress compensation has a significant effect on the IPS system behavior,while an optimized excavation sequence slightly improves its behavior.With the conclusion proposed based on the numerical results,the aim is to provide reference data for optimization design and the construction sequence.
