站场路基岩溶侵蚀病害分析及整治措施优化  

Disease Analysis and Treatment Measures Optimization of Karst Erosion of Bedrock in the Station Road

作　　者：陈洁菲[1] CHEN Jiefei(China Railway 19^(th) Bureau Group Co.Ltd.,Beijing 100176,China)

机构地区：[1]中铁十九局集团有限公司,北京100176

出　　处：《铁道建筑技术》2021年第S01期250-254,共5页Railway Construction Technology

基　　金：中铁十九局集团有限公司开发计划项目(18-08A)。

摘　　要：岩溶侵蚀对路基的承载力和稳定性均有影响,如果不及时整治或整治措施不当,路基在使用过程中易出现整体或局部沉降,严重时影响铁路的正常运营。结合云桂铁路阳宗站场路基岩溶侵蚀整治施工案例,针对站场路基岩溶侵蚀的危害,通过对比岩溶侵蚀条件,选用旋喷注浆、CFG桩进行整治处理,现场施工发现整治效果不理想,不能有效解决地基承载力不足或稳定性差的问题,经优化结构设计,利用桩板结构进行加固处理,不但能够提高地基的承载能力,而且能预防地下水的侵蚀破坏,从根本上解决了岩溶侵蚀路基的病害,确保铁路运营安全,避免运营期间的频繁维修,为类似地质条件下的工程施工提供一定的指导和借鉴。Karst erosion has an impact on the bearing capacity and stability of the subgrade.If it is not treated in time or the treatment measures are not appropriate,the subgrade is prone to overall or local settlement in the process of use,which seriously affects the normal operation of the railway.Combined with the construction case of karst erosion treatment of Yangzong Station Road of Yunnan-Guangxi Railway,aiming at the hazards of karst erosion of the Station Road,through the comparison of karst erosion conditions,jet grouting and CFG pile are selected.It is found that the treatment effect is not ideal and can not effectively solve the problem of insufficient bearing capacity or poor stability of foundation.After optimizing the structural design,the pile plate structure is used for reinforcement treatment can not only improve the bearing capacity of the foundation,but also prevent the erosion of groundwater,fundamentally solve the disease of karst erosion subgrade,ensure the safety of railway operation,avoid frequent maintenance during operation,and provide certain guidance and reference for engineering construction under similar geological conditions.

关 键 词：岩溶侵蚀 稳定性 沉降 整治 桩板结构 

分 类 号：U213.1[交通运输工程—道路与铁道工程]