路基工程
路基工程
로기공정
SUBGRADE ENGINEERING
2011年
4期
65-68
,共4页
红粘土%边坡%岩溶破碎带%强夯法%清爆换填法
紅粘土%邊坡%巖溶破碎帶%彊夯法%清爆換填法
홍점토%변파%암용파쇄대%강항법%청폭환전법
red clay%slope%karst fracture zone%dynamic compaction method%blasting for replacement
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。
針對昆明新機場驗證試驗小區紅粘土邊坡及巖溶破碎帶,分彆進行彊夯法和清爆換填法處理,併通過載荷試驗驗證其處理效果。結果錶明：破碎帶清爆換填後的地基承載力特徵值達到400kPa,彊夯麵平均沉降量為30 cm,效果明顯;對于埋設較淺的溶蝕破碎帶,建議首先爆破揭頂,分層迴填塊石後採用彊夯處理;紅粘土邊坡彊夯後的地基承載力特徵值為210 kPa,變形模量為1.74～2.14 MPa。
침대곤명신궤장험증시험소구홍점토변파급암용파쇄대,분별진행강항법화청폭환전법처리,병통과재하시험험증기처리효과。결과표명：파쇄대청폭환전후적지기승재력특정치체도400kPa,강항면평균침강량위30 cm,효과명현;대우매설교천적용식파쇄대,건의수선폭파게정,분층회전괴석후채용강항처리;홍점토변파강항후적지기승재력특정치위210 kPa,변형모량위1.74～2.14 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.
