湿陷性黄土地区高含水量路基基底处理技术
摘要:西商高速公路第五合同段路基基底土质为高含水量湿陷性黄土。为了消除或减少土体的湿陷性,解决地基土体含水率高,达到设计承载力的要求,采用“强夯+压填片石+灰土砂砾+灰土垫层”的基底处理方法。经过检测处理结果满足设计要求,效果良好。
关键词:高含水量;湿陷性;强夯;灰土砂砾 ;灰土垫层
Abstract: the west business highway subgrade soil fifth contract section basement for high water content in the collapsible loess. In order to eliminate or reduce the soil collapsible sex, solve the foundation soil moisture content is high, to meet the design requirements of bearing capacity, the “dynamic consolidation pressure fill PianShi + + + plaster pad gravel there” at the base of the processing method. After testing processing results meet the design requirements, and the result is good.
Keywords: high water content; Collapsible sex; The dynamic compaction; Dust the gravel; Plaster pad
1工程概况
我国湿陷性黄土主要分布在山西、陕西、甘肃的大部分地区,面积达44万km2。在陕西省西安至商州高速公路建设西商高速公路第五合同段建设中,线路沿灞河北岸黄土台塬设线,黄土湿陷性等级为Ⅰ~Ⅱ级非自重湿陷和Ⅱ级自重湿陷,湿陷土深度为6~8m,基底土体含水率在20%以上。本项目路基全长6.94km,全线路基挖土方141.70万m3,借砂砾填方78.4万m3。
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