A comprehensive treatment plan for karst foundations under complex conditions was pro-posed to reduce post construction roadbed settlement diseases,by using sleeve valve pipes to inject grout in designated intervals for deep karst and soil caves,and high-pressure rotary spraying treat-ment for the red clay layer on the top of the cave.Effectively compacting the karst cave cavity and fill-ing materials was realized,and blocking their hydraulic channels was achieved at the same time.For shallow soil caves,open cut backfill lightweight concrete treatment was used.According to the moni-toring and settlement observation results of the processed karst roadbed,the comprehensive treatment of the karst roadbed using multiple methods has achieved good results and met the design require-ments.
关键词
城市道路/溶洞/土洞/填注浆/高压旋喷/岩溶地基处理
Key words
urban roads/karst caves/soil cave/filling and grouting/high pressure rotary jet/pre-scription plan for karst foundation
维普
万方数据