人民黄河2025，Vol.47Issue(5)：148-154,7.DOI:10.3969/j.issn.1000-1379.2025.05.024
考虑剪切-渗流耦合作用的深埋输水隧洞数值模拟
Numerical Simulation Study on Deep Buried Water Conveyance Tunnel Considering Shear Seepage Coupling Effect
摘要
Abstract
Based on the block discrete element method,a three-dimensional model example of a deeply buried tunnel with circumferential and axial fissures was established,revealing the influence of fissure parameters,water pressure boundary,drainage conditions,and other pa-rameters on the tunnel surrounding rock-lining structure.The results indicate that ignoring the shear-seepage coupling effect of the surrounding rock fissures under high water pressure will overestimate the safety of the surrounding rock-lining structure.The lining at the in-tersection of the circumferential and axial structural planes of the tunnel lining exhibits uneven stress distribution,which is mainly caused by the uneven distribution of external water pressure on the lining due to the preferential seepage channels.Additionally,high water pressure re-duces the effective normal stress of the fissures,leading to a decrease in shear strength and subsequently inducing shear failure of the sur-rounding rock fissures.Finally,suggestions for the safety control of the surrounding rock-lining structure were proposed,focusing on impro-ving the shear strength of the structural planes and reducing external water pressure,aiming to provide theoretical guidance for the long-term safe and stable operation of the tunnel.关键词
深埋隧洞/裂隙围岩/剪切-渗流/块体离散元/围岩稳定性Key words
deep buried tunnel/fractured rock mass/shear-seepage/block discrete element/stability of surrounding rock分类
建筑与水利引用本文复制引用
焦裕,王继敏,聂强,来记桃,王媛,冯迪,陶蒙蒙,任杰..考虑剪切-渗流耦合作用的深埋输水隧洞数值模拟[J].人民黄河,2025,47(5):148-154,7.基金项目
国家自然科学基金资助项目(U23B20144,U2240210,52209129) （U23B20144,U2240210,52209129）
