Theoretical study of short pile effect in tunnel excavation

2017 2nd International Seminar on Advances in Materials Science and Engineering

Tian, Xiao-Yan^1 ; Liu, Jing^1 ; Gao, Xiao-Mei^1 ; Li, Yuan^2

Civil Engineering Department, School of Mechanical Engineering, Xi'an Shiyou University, Xi'an

710065, China^1

China Northwest Architecture Design and Research Institute CO. LTD, Xi'an

710018, China^2

关键词: Elasto-plastic models;    Empirical formulas;    Equilibrium conditions;    Pile side frictions;    Settlement calculation;    Theoretical study;    Two-stage analysis;    Vertical displacements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012079/pdf
DOI  :  10.1088/1757-899X/231/1/012079

来源: IOP

【 摘 要 】

The Misaki Sato Go ideal elastoplastic model is adopted and the two stage analysis theory is used to study the effect of tunnel excavation on short pile effect in this paper. In the first stage, the free field vertical displacement of the soil at the corresponding pile location is obtained by using empirical formula. In the second stage, the displacement is applied to the corresponding pile location. The equilibrium condition of micro physical differential equation settlement of piles. Then through logical deduction and the boundary condition expressions of the settlement calculation, obtain the pile side friction resistance and axial force of the week. Finally, an engineering example is used to analyze the influence of the change of main parameters on their effects.