Abstract

The chief objective of the article is to investigate the bearing capacity of limestone strata roof containing a shallow-buried cylinder Karst cave. Firstly, taking into account the characteristics of Karst landform in China, a spatial axial-symmetrical model was established. Concurrently, the general solution of stress components was gained using Love displacement method. Subsequently, combining failure mechanism of ground collapse and the expressions of stress components, the bearing capacity calculation formula was determined. Finally, based on practical engineering, a comparison of calculation result indicates the error is less than 3.5%, which meets the proposal standard necessity in practice.

摘要

本文的主要目的是研究含浅埋圆柱岩溶洞的石灰岩地层顶板的承载力。首先，结合我国喀斯特地貌特征，建立空间轴对称模型。同时，采用Love位移法得到应力分量的通解。随后，结合地基塌陷破坏机理和应力分量表达式，确定了承载力计算公式。最后，基于工程实际，计算结果对比表明误差小于3.5%，符合提案标准在实践中的必要性。