On the characteristics of the cone penetration value and its correlation with bearing capacity for recently sedimentary layer in Huaibei plain

According to the unique geological characteristics in Huaibei plain, the systematic field testing study is developed, and the characteristics of actual range and influencing factors of the specific penetration resistance of recently deposited silt and calcareous concretionary soil are analyzed. Based on this, the correlation between the cone penetration test value and bearing capacity of foundation in Huaibei plain is discussed. The experimental research shows that the main factors influencing the specific penetration resistance of cohesive soil are the age of geological formation and the calcareous concretion, and the main influencing factor of recently deposited silt is the sandwich soil. It also shows that the discreteness of the cone penetration test value is determined by non-uniform distribution of diameter of the calcareous concretion, and the average value of the specific penetration resistance is directly affected by content of the calcareous concretion. Finally, the empirical formula between the calcareous concretion and bearing capacity of foundation in cohesive soil, silt and silty sand is established, and also the reliability of the formula is verified by adopting a large amount of existing measured data.