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贵州六威高速公路在施工过程中某路基发生了滑塌。通过地质资料和路基填筑过程分析,认为该滑坡形成的主要原因是路基位于斜坡地带,地基存在淤泥质粘土,路基填筑后,导致地基土体抗剪强度不足,从而导致路基左侧土体发生沉降剪切破坏。对比分析了清淤换填+反压护坡、抗滑桩两种处治方案的优缺点,在综合考虑技术、经济、安全与工期要求的基础上,提出了合适的工程处治措施。
Guizhou Liuwei Expressway in the construction process of a subgrade collapse. Through the analysis of geological data and roadbed filling process, it is considered that the main reason for the landslide formation is that the roadbed is located in the slope zone and the silt clay is present in the foundation. After the roadbed is filled, the shear strength of the foundation soil is insufficient, resulting in the left soil Sediment shear damage occurred. The advantages and disadvantages of two treatment schemes of dredging replacement, back pressure revetment and anti-slide piles are comparatively analyzed. Based on the comprehensive consideration of the requirements of technology, economy, safety and construction, appropriate engineering treatment measures are put forward.