The approximate formulas for the natural frequency of bridge piers with shallow foundation, pile foundation and sunk shaft foundation were derived by the Rayleigh Method.
采用瑞利法，导出了计算浅平基桥墩、桩基桥墩及沉井基础桥墩基频的近似公式。
The results show that the foundation settlements obtained by the modified deep foundation layer-wise summation method are much less than those of shallow natural foundation.
结果表明：采用修正实体深基础分层总和法计算沉降控制复合桩基基础的沉降量要比天然地基浅基础的沉降量小；
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