岩土工程学报2025，Vol.47Issue(z2)：49-55,7.DOI:10.11779/CJGE2025S20040
盾构隧道涌水涌砂灾害演化机理模型试验研究
Experimental study on evolution mechanism of soil-water inrush disasters in shield tunnels
摘要
Abstract
When leakage disasters occur in shield tunnels within confined aquifers of soft soil regions,significant volumes of water and soil flowed into the tunnel,destabilizing the in-situ stress equilibrium and triggering progressive collapse.To investigate the evolutionary mechanisms of water-sand inrush and the structural response of the tunnel,this study develops an experimental apparatus simulating leakage under varied crack opening speeds,locations,and composite strata conditions.Results demonstrate that narrow cracks induced soil arching,thereby reducing leakage rates and sand loss.Conversely,crack enlargement destabilizes the arch,reactivating sand loss until a new arch formed.The failure surface of the sand loss zone propagates upward along the tunnel periphery,with a critical crack width determining the convergence of the erosion cavity and failure surface—a parameter directly governed by crack location.When the tunnel is positioned at a clay-sand interface,erosion advances rapidly,forming cavities at the crack with failure angles dictated by the soil's internal friction angles.关键词
盾构隧道/涌水涌砂/模型试验/灾害演化Key words
shield tunnel/soil-water inrush/model test/hazard evolution分类
交通工程引用本文复制引用
马庆伟,张书奇,张天奇,楼一勋,陈至通,周卓然,袁杰,程雪松..盾构隧道涌水涌砂灾害演化机理模型试验研究[J].岩土工程学报,2025,47(z2):49-55,7.基金项目
国家自然科学基金面上项目(52478408) （52478408）
国家自然科学基金面上项目(52178343) （52178343）
天津市杰出青年基金项目(24JCJQJC00170) （24JCJQJC00170）
