勘察实践中地基承载力特征值的确定

Determination of Characteristic Values of Subgrade Bearing Capacity in Investigation Practice

本文阐述了岩土工程勘察中在基础设计方案尚不明确的情况下确定地基承载力特征值的多种方法,如由载荷试验成果直接确定,根据抗剪强度指标按理论公式计算确定,利用地区经验根据土工试验、原位测试等查表确定等。并结合两个不同地区、不同规模的工程实例分析,讨论了应用中需要考虑的问题,介绍了工程师在实际工作中常用的对地基承载力确定影响较大的抗剪强度指标、原位测试成果等的取值办法。

Under the indefinite scheme of foundation design, several methods to determine the characteristic values of subgrade bearing capacity such as to determine the capacity by loading test results directly, by the calculation from theoretical formulas based on shear strength parameters, by tables for bearing capacity from regional expeience, soil tests and in-situ tests are introduced, Issues for the use of the said methods are discussed through two engineering examples, and the value selections of the parameters of bearing capacity and the in-situ test results are expounded.