桂林岩溶区地基承载力理论确定方法的分析

[WT4HZ] ANALYSIS ON THEORETICAL DETERMINATION METHODS FOR BEARING CAPACITY OF FOUNDATION IN GUILIN KARST AREA

理论计算是确定地基承载力的重要方法之一。《建筑地基基础设计规范》GB5 0 0 0 7- 2 0 0 2中的地基承载力计算公式是基于弹塑性理论上建立的。桂林岩溶区地基土主要为粘土、粉质粘土、粉土等。本文在工程实例和理论分析的基础上 ,探讨了理论计算方法在桂林岩溶区地基承载力的确定的适用性 ,并且认为粉土地基不适宜用理论方法确定承载力。另外 ,结合桂林岩溶区地基的排水条件、施工条件等 ,对理论计算中 C、φ值的选用进行了分析 ,并提出了一些建议。

WT5BZ]Theoretical calculation is one of the most important methods for the determination of bearing capacity of foundation. With the elastoplastic theory, the formulation for bearing capacity of foundation has been deduced in “Code for design of building foundation”GB50007-2002. The clay, silt clay and silt are the main foundation earth in Guilin karst area. Based on engineering cases and theoretical analyses, the suitability of theoretical calculation methods has been discussed on bearing capacity of shallow foundation in Guilin karst area, and that the theoretical calculation is unsuitable for silt foundation has also been pointed out in this paper. With the information of foundation drainage and foundation construction in Guilin karst area, the choices of c and φ values in the process of theoretical calculation have been analyzed, and some advice has also been presented.