Based on deformed coordination of soil-foundation, considering torsion of foundation, stiffness equation is given.
从基础与地基变形协调条件出发，考虑地基梁的扭转影响，导出了地基梁的扭转刚度方程。
The proposed elemental stiffness equation is very convenient for practical application due to its simplicity and less computational effort.
该单元刚度方程形式简单，计算量小，便于工程实际应用。
Secondly, with using the design of pile foundation by M-method, the stiffness equation of pile under the interaction of piles and soils is derived.
其次，桩基与土的相互作用按弹性桩的线性地基反力假设法中的m法计算，推导出了桩土相互作用下桩基单元刚度方程；
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