岩土力学2017，Vol.38Issue(12)：3427-3435,3444,10.DOI:10.16285/j.rsm.2017.12.005
注浆对盾构隧道渗漏引起的孔隙水压力变化的影响
Effect of grouting on tunnel leakage-induced pore pressure change in saturated soft soils
摘要
Abstract
Tunnel leakage happens very often through shield tunnel joints and grouting holes.It can induce the pore pressure decrease around the tunnel and then result in tunnel and ground settlements.In tunnel engineering,Grouting is usually used to prevent tunnel leakage.What's more,the synchronous grouting is considered to be the first barrier of tunnel leakage.To investigate the effect of grouting on tunnel leakage,the permeability of inert and cement grouting is firstly studied using laboratory tests.The experimental results show that the permeability of both inert and cement grouting decreases with time and consolidation pressure at the early ages of grouting.The stable permeability of inert grouting is higher than that of the cement grouting.Thus,the cement grouting rather than the inert grouting can be used to prevent tunnel leakage.Then,the predicting method of tunnel leakage-induced pore pressure decrease is suggested considering the effect of grouting and tunnel lining.The calculations results show that the cement grouting can reduce the tunnel leakage-induced pore pressure decrease.Furthermore,the effect of grouting on tunnel leakage-induced pore pressure change depends on the permeability of tunnel lining.Finally,a dimensionless parameter RP is proposed to describe the relationship of tunnel leakage-induced pore pressure change and the permeability of grouting and tunnel lining.The results show that the grouting can reduce the decrease of leakage-induced water pressure,while,the effect of grouting on tunnel leakage depends on the relative permeability of tunnel lining and surrounding soils.关键词
注浆/盾构隧道/渗漏/孔隙水压力/相对渗透系数Key words
grouting/shield tunnel/leakage/pore pressure/relative permeability分类
建筑与水利引用本文复制引用
张冬梅,冉龙洲,闫静雅,杨天亮..注浆对盾构隧道渗漏引起的孔隙水压力变化的影响[J].岩土力学,2017,38(12):3427-3435,3444,10.基金项目
国家自然科学基金(No.51478344,No.41772295) （No.51478344,No.41772295）
国土资源部地面沉降监测与防治重点实验室开放基金(No.KLLSMP201501).This work was supported by the National Natural Science Foundation of China (51478344,41772295) and the Key Laboratory of Land Subsidence Monitoring and Prevention,Ministry of Land and Resources of the People's Republic of China (KLLSMP201501). （No.KLLSMP201501）
