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地基承载力不足是公路小型构造物病害的主要原因之一,影响公路的安全通行;皖北地区地质条件复杂多变,韵律结构明显,准确评价成层地基的承载力成为工程建设的关键问题。针对皖北地区地质结构特点,对典型双层地基不同工况下附加应力和承载力特性进行系统研究,分析不同土层结构、土层厚度和基础宽度等对扩散规律和地基承载力的影响,讨论影响因素的变化规律,为双层地基现场勘察、工程设计等合理确定地基承载力提供参考。
The lack of foundation bearing capacity is one of the main reasons for the damage of highway small structures and affects the safe passage of highway. The geological conditions in northern Anhui are complex and changeable, and the rhyme structure is obvious. Accurately evaluating bearing capacity of layered foundations has become the key issue of construction. According to the characteristics of geological structure in northern Anhui Province, the characteristics of additional stress and bearing capacity of typical double-layered soil under different working conditions were systematically studied. The influences of different soil layers, thickness and basic width of soil on the diffusion rules and bearing capacity of foundation were analyzed. Discusses the change rule of influencing factors, and provides reference for the reasonable foundation bearing capacity of double-layer foundation investigation, engineering design and so on.