多重不良地质条件隧道开挖稳定性与突水预防研究

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【中图分类号】：U451.2 【文献标志码】：A 【文章编号】：1008-3197（2025）02-05-05

【DOI编码】：10.3969/j.issn.1008-3197.2025.02.002

Stability Analysisof Tunnel Excavation and Prevention of Water Inrush in Multiple Adverse Geology

LIUHao，CHENGKeyuan，RANHaibo，YANGRenjie （Sinohydro Bureau7Co.Ltd.，Chengdu 610213，China）

【Abstract】 ∴ Aiming at the stability of working face when the tunnel passes through t adverse geological superposition areas，taking the Zhongliangshan Tunnel of Chongqing Railway Line27as the engineering background，the influence of multipleadverse geology on the change of surrounding rock seepage field，displacement field and plastic zone during tunnel excavation was studied by the three-dimensional fluid-solid coupling numerical method.Corresponding safe thicknesses for water inrush prevention are obtained.The results show that the superposition of multiple adverse geological conditions will intensify the water inrush disasters in tunnels，and earlyprevention is needed.Diferent thicknesses of rock mass for water inrush prevention should be reserved according to the distribution of adverse geological conditions.

【Key words】：tunnel excavation；multiple adverse geology；water inrush；rock thickness；working face stability

隧道施工穿越富水区、断层、喀斯特、采空区等多种不良地质共同叠加区更容易发生隧道突水、突泥、掌子面失稳等灾害＼～2。（剩余6116字）