66 Study on the Self-Boring In-Situ Shear Pressure Meter and It's Uplift Mechanism

Self-boring in-situ shear pressure meter test (SBISP) is a combination of traditional pressure meter test and laboratory direct shear test. When simply radial load carried out, it equals to pressure meter test. When simply uplift load done, it equals to single uplift pile test. The paper presents the different parts of the apparatus, introduces the loading methods and the mechanical parameters obtained from SBISP. And it also analyses the failure forms, the relationship between uplift stress and shear displacement, and defines the concept of shear reaction coefficient, which can be reference to research on mechanism of uplift piles.