顺坡填筑的填土地基处理方法应用分析

APPLICATION AND ANALYSIS OF ARTIFICIAL LANDFILL FOUNDATION TREATMENT FOR SLOPE FILLING

近年来顺坡填筑的人工填土地基处理在山区城市建设中屡见不鲜。人工填土的湿陷性、不均匀性给地基处理带来技术难题,特别是顺坡填筑的人工填土,土层厚度大且厚度不均,若处理方案选择不合理可能导致较大不均匀沉降,导致建筑物开裂变形,影响正常使用。文中结合具体工程实例,采用数值分析手段对三种地基加固方案进行了对比分析,比较了单一强夯法、加筋土地基加固法、强夯和加筋土地基联合加固法的处理效果。通过对沉降量和沉降曲线变化趋势的分析,在项目设计方案中选取了强夯联合加筋土加固的地基处理方法。项目已竣工5年以上,位移监测结果表明,沉降变形在规范允许范围内,该项目的成功实施可为以后类似顺坡填筑的填土地基处理设计提供参考。

In recent years, the artificial landfill foundation treatment of the slopes has been frequently seen in the construction of hilly cities. The collapsibility and unevenness of artificial fills bring technical difficulties to the foundation treatment. Especially for the artificial filling filled by the slopes, the thickness of the soil layer is large and uneven. If the treatment scheme is unreasonable, it may lead to larger uneven settlement, which will cause cracking and deformation of the building and affect normal usage. In this paper, the numerical analysis method is used to compare the three foundation reinforcement schemes based on the specific engineering examples. The treatment effects of single dynamic consolidation method, reinforced soil foundation method, dynamic consolidation and reinforced soil combined reinforcement foundation method are compared. Based on the analysis of the variation trend of settlement and settlement curve, the foundation treatment method of dynamic consolidation and reinforced soil combined with the reinforcement foundation was selected in the project design. The project has been completed for more than 5 years. The displacement monitoring results show that the settlement deformation is within the allowable range of the specification. The successful implementation of the project can provide reference for the design of landfill treatment similar to the slope filling.