Abstract:
Vibrating wire type steel bar stress gauge is commonly used in pile test. Since the gauge is buried at the height of 1.5 ~ 3 times pile diameter above the pile bottom, the pile-end load can't be obtained directly. Also it's difficult to obtain valid test data by the pressure cells that is unevenly compressed due to non-planar surface of pile bottom. So the engineering experiences have to be used in figuring out the end and skin resistance of the pile-end bearing stratum. We propose a method that can calculate the pile-end load by the measured axial force and compression deformation of pile body. The method can be used to calculate the pile-end load by the pile axial force, compression deformation and the relationship between stress and deformation of pile body, then the end and skin resistance of the pile-end bearing stratum is calculated by the pile-end load. An actual project example demonstrates that the method is feasible and complements the reinforcement stress gauge method and increases the reliability of pile testing results.