边坡支护双排桩变形和内力的解析分析

An Analytical Solution to the Deformation and Internal Force of Double-row Piles in Slope Support

对于边坡支护中的双排桩结构体系,将滑面以上桩间土视为前后排桩之间的水平连系弹簧,滑面以下土体视为桩的弹性约束,桩顶连梁看成刚性梁.在此基础上,利用桩的弯曲微分方程,考虑桩在滑面处的变形连续和内力连续性条件,进行解析分析,得到双排桩的变形曲线、弯矩和剪力的解析解.算例表明,理论推导正确,结果可靠,方法便于工程应用.

For double‐row piles in slope support ,the soil above the slide surface between the piles is simplified as horizontal connecting springs ,and the connecting beam is regarded as a rigid body .The soil under the slide surface is regarded as horizontal elastic restriction to the piles .An analytical solution to the deformation curve ,bending moment and shearing force of double‐row piles is presented with the help of bending differential equation and continuity condition of deformation and internal force of the piles .An ex‐ample show s that the theoretical derivation is accurate ,the result is dependable and the method is conven‐ient for engineering calculation .