强夯加固技术在湿陷性黄土路基处治中的应用  

Application of strong tamping reinforcement technique in treatment of collapse loess subgrade

作　　者：庞旭卿[1,2] 

机构地区：[1]陕西铁路工程职业技术学院铁道工程系,陕西渭南714000 [2]长安大学地质与测绘工程学院,陕西西安710054

出　　处：《兰州理工大学学报》2010年第1期117-121,共5页Journal of Lanzhou University of Technology

基　　金：交通部西部交通建设科技项目(200131836115)

摘　　要：结合具体试验路段,通过颗粒分析、电镜扫描、CBR试验、无侧限抗压强度与固结试验等手段对强夯加固后路基黄土的处治效果进行分析.结果表明,强夯后的路基黄土微结构由絮凝状、支架大孔结构转变为镶嵌结构与叠置结构;不同夯击能下路基黄土的有效加固深度可以通过无侧限抗压强度试验确定;路基黄土的压实度与CBR值服从幂指数关系,与回弹模量和湿陷系数服从指数分布.The treatment result of loess subgrade with strong tamping reinforcement was analyzed for an actually tested road segment by means of particle analysis, electronic microscopic scanning, CBR test, and tests for unconfined compressive strength and consolidation. The result showed that the flocculate cline-cementation structure and plank-macrospore cline-cementation structure of subgrade loess would turn into an embedded structure and pile-up structure. The effective reinforcement depth of subgrade loess with different tamping power could be determined with unconfined compressive strength test. The compactness of subgrade loess and its CBR value exhibited the relation of power function. The resilient modulus and collapsibility coefficient exhibited exponential distribution.

关 键 词：强夯 路基 微结构 湿陷性 CBR试验 

分 类 号：TU413[建筑科学—岩土工程] U415.6[建筑科学—土工工程]