盐渍化软弱土地基处治措施对比分析

Comparative Analysis of Treatment Measures of Saline Soft Soil Foundation

为了综合提高西北地区盐渍化软弱土地段公路地基处理的工程质量,以嘉—安一级公路盐渍化软弱土地段的地基处治项目为工程依托,通过MARC有限元数值计算分析、现场实际监测数据结果以及地基处治措施的社会经济效果评价,研究了适用于西北盐渍化软弱土地基处治的合理措施.结果表明,在处理该特殊土地基时,水泥粉喷桩、强夯置换、振动沉管挤密砂石桩都符合规范要求;从处治效果上来看,后两者的效果要优于水泥粉喷桩,振动沉管挤密砂石桩的效果最好;从社会经济效益评价结果来看,强夯置换在处理盐渍化软弱土地基时的费用最低,最省时,经济效果明显.

In order to improve the project quality of the saline soft soil foundation in Northwestern China,unifying the foundation treatment experiment project of Jia-An Superhighway and the experimental study to saline soft soil base processing,through FEM analysis,the results of field monitoring data,as well as the actual evaluating of socio-economic effects of treatment measures of foundation,studied the application of saline soft soil land-based reasonable treatment measures in northwestern China.The treatment result of DJM,dynamic replacement,vibro compaction sand pile pipe are in accordance with regulatory requirements.From the effect of treatment,viborsinking sand-gravel compaction pile is better.From the evaluation result of social and economic benefits,the dynamic replacement is the least expensive and most time-saving,and its economic effect is obvious.