用静力触探参数确定地基土水平地基抗力系数的比例系数m值--以天津地区为例

承受水平荷载作用的桩基，规范中常采用m法进行桩基水平承载力的计算，地基土水平地基抗力系数的比例系数m值在规范中根据地基土的状态、类别以表格给出。在地基勘察中，现在广泛采用静力触探试验。直接利用静力触探数据给出比例系数m值。将使桩基设计所用参数更加直接准确。本文利用天津地区地层大量静力触探资料与地基土状态数据，利用统计分析回归方法，总结出地基土的液性指数IL与静力触探参数锥尖阻力qc及摩阻比Rf间的关系式，针对天津的地层土体，给出利用静力触探资料查用m值的表格，为桩基的设计计算提供资料。

Determination of the Values of Proportional Coefficient m of the Horizontal Resistance Coefficient of Foundation Soils in Terms of Static CPT Parameters: Case Studies in Tianjin

The horizontal bearing capacity of the pile foundation under a horizontal load is usually calculated through the m method specified in the design specifications. That is, the values of the proportional coefficient M of the horizontal resistance coefficient are listed according to the conditions and types of the foundation soil. Static CPTs are widely used in foundation investigations, and their parameters are utilized to calculate the M value so that the data used in the design calculation of pile foundations are more accurate. In this paper, based on the vast data of static cone penetration test parameters and the foundation soil conditions of soil layers in Tianjin, by statistical analysis and regression the relation formulae between the liquid index I_L and the cone tip penetration resistance q_c and the friction ratio R_f are summarized. Using the stratum of soil in Tianjin as an example, the parameters for the design calculation of the pile foundation are provided by consulting the tabular M values based on the static CPT data.