Three-dimensional theoretical analysis of seepage field in front of shield tunnel face
作者机构：Key Laboratory of Urban Security and Disaster EngineeringMinistry of EducationBeijing University of TechnologyBeijing 100124China
出 版 物：《Underground Space》 (地下空间（英文）)
年 卷 期：2022年第7卷第4期
页 面：528-542页
核心收录：
学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程]
基 金：the financial support provided by Natural Science Foundation of China(Grant No.51978019)
主 题：Seepage flow Hydraulic head distribution Shield tunnel Numerical simulation Water pressure
摘 要：To evaluate hydraulic head distribution in front of a shield tunnel in a saturated soil layer,theoretical analysis and numerical simulations are carried out in this *** on the partial differential equilibrium equation of seepage flow,a three-dimensional(3D)theoretical analytical model of the shield tunnel face and the seepage field in front of it is established using the eigenfunction and the Fourier series expansion methods,and the hydraulic head calculation formula is *** with engineering cases,the theoretical analysis results and the 3D numerical simulation results are compared and *** effect of the water pressure of the tunnel face on the hydraulic head distribution is also *** results of the proposed analytical solution are in agreement with those of the numerical simulation solutions;moreover,the proposed analytical solution requires less time to calculate the seepage hydraulic head than the numerical *** ratio of the initial water table to the diameter(D)of tunnel face has a more significant impact on the hydraulic head distribution at a position 0.5D above the tunnel *** the water pressure on the tunnel face is not considered,the values of the hydraulic head are significantly underestimated.
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