昆明新机场红粘土边坡地基处理试验研究  

Experimental Study on Red Clay Slope Foundation Treatment in Kunming New Airport

作　　者：谭峰屹[1] 任佳丽[2] 姜志全[1] 

机构地区：[1]长江科学院,武汉430010 [2]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《路基工程》2011年第4期65-68,共4页Subgrade Engineering

摘　　要：针对昆明新机场验证试验小区红粘土边坡及岩溶破碎带,分别进行强夯法和清爆换填法处理,并通过载荷试验验证其处理效果。结果表明:破碎带清爆换填后的地基承载力特征值达到400kPa,强夯面平均沉降量为30 cm,效果明显;对于埋设较浅的溶蚀破碎带,建议首先爆破揭顶,分层回填块石后采用强夯处理;红粘土边坡强夯后的地基承载力特征值为210 kPa,变形模量为1.74～2.14 MPa。The red clay slope and karst fracture zone in Kunming new airport test section are separately treated by dynamic compaction and blasting for replacement.The treatment effect is verified through load test.The results show that foundation bearing capacity of fracture zone after replacement reaches 400 kPa and the average settlement on compacted surface is 30 cm,with obvious effect.For shadow-buried karst fracture zone,it is recommended to first blast to backfill block stones by layers and then compact the zone.Foundation bearing capacity of red clay slope after compaction is 210 kPa and deformation modulus is 1.74~2.14 MPa.

关 键 词：红粘土 边坡 岩溶破碎带 强夯法 清爆换填法 

分 类 号：U416.14[交通运输工程—道路与铁道工程]