群桩沉降简化计算方法

将均质土和成层土中的单桩桩顶沉降分成桩端力引起的沉降、桩身压缩和桩侧阻力引起的沉降3部分分别计算，获得单桩沉降后，运用等代墩法可获得群桩的平均沉降。单桩沉降计算方法可考虑桩端力与桩端位移的非线性关系和桩侧阻力引起沉降的非线性特性，同时计算方法可考虑桩身压缩对桩顶沉降的贡献。算例分析表明，计算值与实测值和其他方法的计算值有较好的一致性，验证了该方法的合理性。

A simplified calculation approach for settlement of pile groups

The pile head settlement of a single pile in homogeneous soil and multilayered soils can be subdivided into three aspects,including the pile tip settlement induced by mobilized load at the pile tip,the compression of pile shaft,and the settlement caused by the skin friction.Based on the settlement of a single pile and the equivalent pier method,a simplified calculation approach for average settlement of pile groups is obtained.The nonlinear relationship between the pile tip load and the settlement at the pile tip,and the nonlinear settlement induced by the skin friction can be taken into account,as well as the pile shaft compression.The settlements of a single pile and pile groups drawn from the present method are generally in good agreement with the measured values and the calculated values estimated from other methods.