Abstract: A safe, reasonable and high efficiency geotechnical design in a practical engineering project is based on a comprehensive analysis of the site-specific soil and rock properties. In this paper, the soil bearing capacity and compression modulus of the central foundation of a large project in Beijing are estimated by using the in-situ testing technique of cone penetration test (CPT). The results show that the variation of the bearing capacity of the foundation estimated by the CPT and the actual laboratory test is roughly the same, and the bearing capacity of the foundation is slightly different at various depth points. The compression modulus of soil layer estimated by CPT is slightly smaller than that measured from the laboratory test. At a soil depth of 32.6m, the compression modulus determined by CPT is much larger than that determined by laboratory test results. The compression modulus estimated by the CPT and the actual compression modulus vary with the depth of the soil. The results show that the CPT can accurately reflect the actual bearing capacity and the compression modulus of soils.

Key words: Cone Penetration Test, Laboratory Test, Foundation Bearing Capacity, Compression Modulus