Abstract: In geotechnical engineering investigation, it is necessary to use a variety of investigation means and methods to obtain the foundation bearing capacity. Because of the heterogeneity of soil, sampling disturbance, indoor test and field insitu test operations, the bearing capacity values obtained by the standard table or theoretical calculation might usually be significantly different. The bearing capacity values for the foundation soils should be determined by comprehensive analyses. This paper analyzes the influence of the indices obtained by the indoor geotechnical test and the insitu test methods on the bearing capacity of the foundation soils, and evaluates the reliability, in order to provide an economic and reasonable warrantee for the design and construction of the foundation and a reference for the bearing capacity in the geotechnical investigation.

Key words: Geotechnical Investigation, Bearing Capacity f Foundation Soils, Reliability Analysis