甘肃省黄土地基承载力测试与评价研究

地基承载力是黄土地区工程设计的基本和关键参数，直接决定着工程建设的安全可靠性和经济性。通过实测甘肃省不同地区、不同时代成因黄土的地基承载力，分析了黄土地基的压缩变形规律与机理。研究表明，孔隙比在很大程度上决定着黄土地基的破坏模式及承载力大小，黄土地基承载力同时也与土体含水率、液塑限密切相关。尽管依据土体物理指标确定地基承载力的回归关系式形式有所不同，但计算结果在一定条件下与实测值吻合度较高，通过对比分析各回归关系式的适宜性及优缺点，结合规范推荐值和实测值，给出了甘肃省陇西地区和陇东地区一般新黄土的地基承载力表。

Study on testing and evaluation for bearing capacity of loess foundation in Gansu Province

The bearing capacity of foundation is basic and key parameter of engineering design in loess regions，which directly determines the safety，reliability and economy of engineering construction. By measuring the bearing capacity of loess foundation of different regions and different times in Gansu province，the law and mechanism of compression deformation of loess foundation are analyzed. The research illustrates that the pore ratio determines the failure mode and bearing capacity of loess foundation to a great extent，and the bearing capacity of loess foundation is also closely related to soil moisture content and liquid plastic limit. Although the regression expressions determining the bearing capacity of foundation based on soil physical indexes are different， the calculated values are in good agreement with the measured values under certain conditions. Additionally，by comparing and analyzing the suitability，pros and cons of each regression expression，based on the specification recommended value and the field measured value，the bearing capacity table of new loess foundation in Longxi and Longdong areas of Gansu Province is given.