西南交通大学学报2025，Vol.60Issue(3)：618-627,10.DOI:10.3969/j.issn.0258-2724.20230408
非对称渗流边界小净距隧道渗流场特征及结构安全分析
Characteristics of Seepage Field and Structural Safety Analysis of Small Interval Tunnels with Asymmetric Seepage Boundaries
摘要
Abstract
To study the characteristics of the seepage-stress field and the safety of the lining structure of small interval tunnels under asymmetric seepage boundary conditions,based on the Liantang Tunnel in Shenzhen,China,a seepage model experiment for the small interval tunnels was developed.In addition,through model experiment and analog simulation,the distribution law of seepage water pressure in the surrounding rock of the small interval tunnels under unilateral water source conditions was analyzed,and the evolution law of the seepage field and the safety of the lining at different distances from the water sources were revealed.The results indicate that the surrounding rock seepage field of the small interval tunnels exhibits a significant asymmetric distribution under unilateral water source conditions.The water level decreases nonlinearly from the water replenishment boundary to the other side.Besides,the water pressure in the surrounding rock near the tunnels is distributed in an asymmetric"W"shape.The asymmetric distribution of the surrounding rock seepage field leads to the asymmetry of water pressure,water inflow,and safety coefficient in the left and right tunnels.Compared with the tunnel farther from the water source,the average water pressure and water inflow of the tunnel closer to the water source increases by 10.4%and 5.5%,respectively,and the safety coefficient decreases by 3.0%.Moreover,the water pressure asymmetry of the tunnel closer to the water source is more significant.The asymmetry of water pressure distribution in the surrounding rock and lining slightly increases from the construction period to the operation period.As the distance from the water sources increases,the water pressure of the lining linearly decreases,and the safety coefficient and the asymmetry coefficient of the water pressure increase.The research results can provide a reference for the construction and operation of tunnels with asymmetric seepage boundaries in water-rich areas.关键词
小净距隧道/非对称渗流边界/水源距离/渗流/结构安全Key words
small interval tunnels/asymmetric seepage boundary/distance from water source/seepage/structural safety分类
建筑与水利引用本文复制引用
喻炳鑫,陈子全,何川,李铮,蔡鹏麟,张航..非对称渗流边界小净距隧道渗流场特征及结构安全分析[J].西南交通大学学报,2025,60(3):618-627,10.基金项目
国家自然科学基金项目(52378415) （52378415）
重庆市技术创新与应用发展专项(CSTB2024TIAD-KPX0065) （CSTB2024TIAD-KPX0065）
重庆英才计划(CSTC2021YCJH-BGZXM0246)中央高校基本科研业务费专项资金(2682023KJ002). （CSTC2021YCJH-BGZXM0246）
