南京工业大学学报（自然科学版）2025，Vol.47Issue(3)：279-287,9.DOI:10.3969/j.issn.1671-7627.2025.03.007
软土局部差异沉降下顶管法电缆隧道力学损伤分析
Mechanical damage analysis of cable tunnels constructed by pipe jacking method in soft soil under local differential settlement
摘要
Abstract
This study investigated the effect of local differential settlement in soft soil strata on the response of pipe-jacking cable tunnel structure.A theoretical analysis model of displacement-response method was proposed,and its effectiveness was validated through comparison with a beam-spring finite element model.Two distribution patterns of differential settlement were considered:shear zones passing through tunnel joints(odd-type)and mid-span(even-type).Parameter sensitivity analysis was performed to evaluate the effects of differential settlement,soil subsidence,and uplift resistance of soil on the tunnel.The results showed that the longitudinal bending moment and joint shear force of the tunnel in the even-type distribution were significantly larger than those in the odd-type distribution.As the settlement increased,the internal forces of the tunnel exhibited a linear growth trend,with the primary failure mode being joint shear failure rather than longitudinal bending failure of the tunnel.The failure mode in subsidence strata primarily affected the calculation results of internal force in the even-type distribution,while the failure mode in uplift strata mainly affected those in the odd-type distribution.This study can provide a theoretical reference for deformation and damage evaluation and operation and maintenance decision-making of cable tunnels in soft soil areas.关键词
软土地层/电缆隧道/变形损伤/局部差异沉降/接头剪切破坏/位移-响应法Key words
soft soil/cable tunnel/deformation damage/local differential settlement/joint shear failure/displacement-response method分类
土木建筑引用本文复制引用
朱晶晶,王小龙,李欣睿,伍浩良,覃小纲..软土局部差异沉降下顶管法电缆隧道力学损伤分析[J].南京工业大学学报（自然科学版）,2025,47(3):279-287,9.基金项目
国家自然科学基金(52278381) （52278381）
广东省"珠江人才计划"引进创新创业团队项目(2021ZT09G087) （2021ZT09G087）
中国电力工程顾问集团集中开发科技项目(DG2-G02-2022) （DG2-G02-2022）
