静力触探确定桩承载力的理论方法

Theoretical Method for Determining the Bearing Capacity of Pile from Static Cone Penetration

本文简要给出描述静力触探和打入桩贯入机理的计算模式以及贯入阻力、贯入阻力影响范围和贯入阻力临界深度的理论解。在此基础上推导出静力触探指标与桩竖向承载力的理论相关方程。本理论相关方程能反映尺寸效应和深度效应并与经验公式和实测资料相一致。

A new arithematic model for describing the penetration process of both static cone penetro-meter and displaced pile tip in sand is presented.Theoretical solutions of cone rosistance,its effect range and critical depth,as well as side friction resistance are given from the medel.Theoretical rela-tionship between the cone penetration test data and the bearing capacity of pile are derived. It can indi-cate the scale-effect and depth-effect and is in good agreement with empirical formulas and test data.