依托某岩溶地层下穿采空区段铁路隧道工程,对现场出现的病害成因进行分析,并探讨不同处置措施的处理效果.围岩岩体破碎、稳定性下降和裂隙渗水是导致涌水和变形的主要原因;单一的处理措施效果较差,并具有一定的潜在风险;超前地质预报、初期支护加强、反压回填、封闭注浆和增设泄水孔等措施联合使用效果更佳,处理后隧道变形得到有效控制,监控量测显示16天后变形值趋于平缓稳定.
Based on the railway tunnel project of a karst stratum underpassing goaf section,the causes of diseases in the field are analyzed,and the effects of different treatment measures are discussed.The main causes of water gushing and deformation are the fracture,stability decline and fissure seepage of surrounding rock mass.The single treatment measure has poor effect and certain potential risk.The combined use of advanced geological prediction,strengthening of initial support,backfilling under reverse pressure,closed grouting and adding drainage holes is more effective.The deformation of the tunnel after treatment is effectively controlled.The monitoring and measurement show that the deformation value tends to be smooth and stable after 16 days.
何均云
中铁二局集团有限公司,成都 610036
交通运输
超前预报;岩溶;采空区;突涌水;监控量测;灾害防治;处理效果
advanced prediction;karst;goaf;water gushing;monitoring and measurement;disaster prevention and control;treatment effect
《路基工程》 2024 (002)
215-220 / 6
10.13379/j.issn.1003-8825.202312057
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