同步爆扩法处理高速公路液化土地基模型试验研究  

Model Test Study on Treatment of Liquefaction Soil Foundation with Synchronous Blast-enlargement in Expressway

作　　者：王东权[1] 王立权 周国庆[1] 刘春荣[1] 李浩然[1] 邵鹏[1] 李汉光 朱玉晓[1] 

机构地区：[1]中国矿业大学建筑工程学院,江苏徐州221008 [2]徐州市高速公路建设指挥部,江苏徐州221003

出　　处：《中国矿业大学学报》2007年第2期227-231,共5页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展规划(973)项目(2002CB41212704);徐州市科技发展项目(X2003034)

摘　　要：为了获得同步爆扩法处理高速公路液化土地基的现场试验的实施方法和参数,验证理论研究成果,设计了模型试验装置,采用模型试验和对比分析相结合的研究方法,研究了爆扩参数及影响因素、爆扩应力变化规律、爆扩超孔隙水压力变化规律、爆扩排水沉降的规律,提出了现场试验的技术参数和实施方法.结果表明:土体爆扩应力影响范围为6 m,土体爆扩性指标为0.5 m3/kg,爆扩后地面沉降达到200-300 mm,土体物理力学性能提高,液化消失.A group of model tests were conducted to obtain the constructing method and the parameters on treatment of the liquefaction soil foundation with the synchronous blast-enlargement in field test, to verify results of theoretical study. The parameters and their influence factors, the rules of the stesses and the excess pore water pressure, the drainage settlement were studied in special model test equipment. The constructing method and the parameters of field test were proposed. The results show that the affecting scope of the soil blast-enlargement stress is 6 m, the blast-enlargement index is 0.5 mS/kg approximately, the settlement is 200 to 300 mm, the physical and mechanical characteristics of soil are improved and the liquefaction of soil disappear after treatment.

关 键 词：高速公路 液化土地基 同步爆扩 模型试验 

分 类 号：TD235.3[矿业工程—矿井建设] TU472.9[建筑科学—结构工程]