岩土工程学报2026，Vol.48Issue(5)：939-947,9.DOI:10.11779/CJGE20250270
深埋高压输水隧洞复合衬砌结构响应数值模拟研究
Numerical simulation of structural response of composite lining in deeply buried high-pressure water conveyance tunnel
摘要
Abstract
Water conveyance tunnels are susceptible to concrete creep and steel bar corrosion during long-term service,which can degrade the bearing capacity of lining structures.However,the structural mechanical response and deformation characteristics of triple-composite lining systems under long-term service conditions remain poorly understood.Three-dimensional finite element simulations are conducted to investigate the bearing performance of triple-composite lining water conveyance tunnels under high internal pressure and long-term service.The results show that the load transfer path of the composite lining structure exhibits a distinct water pressure threshold effect under high internal water pressure.Below 0.5 MPa,bolt stress increases slowly,with most water pressure borne by the steel lining.Above this threshold(0.5 MPa),bolt stress rises rapidly,and the segment's contribution to bearing water pressure increases.In long-term simulations,the average stress of reinforcement increases over time,while the circumferential strains of self-compacting concrete and segment concrete increase without cracking.The maximum bolt stress decreases slightly due to concrete creep relaxation.Under extreme overpressure(1.8 MPa),significant plastic damage occurs at the crown and invert of self-compacting concrete and segment concrete.The findings offer insights for predicting the long-term safety performance of triple-composite lining tunnels.关键词
输水隧洞/长期服役/复合衬砌/数值模拟Key words
water conveyance tunnel/long-term service/composite lining/numerical simulation分类
建筑与水利引用本文复制引用
严振瑞,周易,朱鸿鹄,黄井武,谭道远,陆丁,周万欢..深埋高压输水隧洞复合衬砌结构响应数值模拟研究[J].岩土工程学报,2026,48(5):939-947,9.基金项目
国家杰出青年科学基金项目(42225702) （42225702）
国家自然科学基金国际合作研究项目(42461160266) （42461160266）
珠江三角洲水资源配置工程专项科研课题(CD88-QT01-2022-0085)This work was supported by the National Science Fund for Distinguished Young Scholars(Grant No.42225702),International(Regional)Cooperation and Exchange Project of National Natural Science Foundation of China(Grant No.42461160266),and Special Research Project on the Pearl River Delta Water Resources Allocation Project(Grant No.CD88-QT01-2022-0085). （CD88-QT01-2022-0085）
