岩土工程学报2024，Vol.46Issue(z2)：177-182,6.DOI:10.11779/CJGE2024S20034
隧道衬砌结构局部减薄数值模拟分析及破坏预测研究
Numerical study on tunnel deformation under local thickness reduction in tunnel linings and destruction prediction
摘要
Abstract
The cavity area commonly appears in lining structures in engineering practice,which has great influences on the long-term stability of tunnel operation.In order to investigate the influences of thickness reduction of lining structures on displacement and mechanical characteristics of tunnels,1000 groups of numerical simulations with different buried depths,angles of local thickness reduction location,reduction lengths and thicknesses of linings of tunnel the conducted.Through analysis of the numerical simulation results,it can be concluded that the local thickness reduction area has less influences on displacement.Tthe maximum compressive stress of the tunnel is mainly concentrated at the left and right arch feet of the tunnel,and local thinning at the right side of the tunnel is prone to causing stress concentration at the left arch feet of the tunnel.Local thinning of linings may cause tensile stress concentration at the left and right arch feets,while under more conditions,local thinning of linings may cause tensile stress concentration near the local thinning area.The tensile stress concentration mainly occurs at the left and right arch feets and near the thinning area.Based on the 1000 groups of numerical simulation results,the CART tunnel damage predictive model is established.Meanwhile,2 numerical examples verify the validity of the predictive model.This study provide numerical simulation basis for the mechanical and stability analysis of tunnels under local thickness reduction.关键词
衬砌结构/局部减薄/决策树模型/数值模拟研究Key words
lining structure/local thinning/decision tree model/numerical simulation分类
建筑与水利引用本文复制引用
林杰,祝江林,黄思璐,肖强,黄玉冰,雷斯达,周攀..隧道衬砌结构局部减薄数值模拟分析及破坏预测研究[J].岩土工程学报,2024,46(z2):177-182,6.基金项目
交通运输部在役干线公路基础设施与安全应急数字化试点项目:湖北省在役干线公路基础设施智能养护试点(212) （212）
湖北省交通运输厅科技项目:基于大数据技术的湖北高速公路隧道养护智能决策研究(2022-11-4-5) （2022-11-4-5）
