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地基承载力不足常导致公路小型构造物发生病害,威胁公路的安全通行,皖北地区互层地基广泛分布,传统的地基承载力确定方法不适用于皖北地区复杂和不确定的多元互层地基。针对皖北地区典型的互层地基地质特征,主要研究含薄弱夹层的多元互层地基的附加应力扩散规律和承载力特性,并考虑夹层土体厚度、基础宽度等对其的影响规律,讨论多层互层地基承载力的主要影响因素,评价其影响范围,使得工程实践中对多层互层地基承载力检测与评价更迅速、合理。
The inadequate bearing capacity of foundation leads to the occurrence of disease of small structures in highway and threatens the safe passage of highways. The widely distributed interbedded foundations in northern Anhui are not suitable for the complicated and uncertain multi-layered interbed in northern Anhui . In view of the geological characteristics of typical interbedded subsoil in northern part of Anhui Province, this paper mainly studies the rules of additional stress diffusion and the bearing capacity of multi-interbedded subsoil with weak interbed, and considers the influence law of intercalated soil thickness and base width on it. The main influence factors of the bearing capacity of the interbedded subsoil and the evaluation of its influence range make the detection and evaluation of the bearing capacity of the multi-interbedded subsoil more rapid and reasonable in engineering practice.