地基承载力计算中强度指标的理论分析  

Theoretical Analysis on Soil Strength Index in the Calculation of Bearing Capacity

作　　者：罗嗣海[1] 邓通发[1] 

机构地区：[1]江西理工大学,江西赣州341000

出　　处：《江西理工大学学报》2007年第1期1-6,共6页Journal of Jiangxi University of Science and Technology

基　　金：江西省自然科学基金(0350054)

摘　　要：基于有效应力强度指标的唯一性假设和不同固结与剪切应力路径下正常固结土三轴压缩总应力强度指标与有效应力强度指标的理论关系式,讨论了取样应力改变、非各向均等固结、非常规剪切应力路径对总应力强度指标的影响；根据条形基础均布荷栽下地基中的应力假设和应力特点,分析了地基内考虑应力条件的强度指标理论数值及其空间分布；讨论了应用不同强度指标理论值时地基承栽力的计算结果及总应力强度指标的选用问题．Based on the assumption of uniqueness of effective stress strength index, the influence of sampling stress change , anisotropic consolidation and special shear stress path on the total stress strength index was discussed from the theoretical expressions relating strength index of total stress to thoes of effective stress. The theoretical values of total stress strength index under a strip foundation were subsequently calculated. Finally, the calculated bearing capacities by using the theoretical values of different strength index of total stress were compared and the option of strength parameters for calculation of bearing capacity was analyzed.

关 键 词：地基承载力 正常固结土 三轴压缩试验 应力备件 总应力强度指标 

分 类 号：TU471[建筑科学—结构工程]