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中文摘要：
为使多层地基土中深基坑支护设计考虑支护结构-土的非线性共同作用,提出由集中力弹簧模型建立支护桩与土相互作用的p-y曲线,进而根据一般弹性地基梁的挠曲微分方程,并考虑桩与锚杆的变形协调,推导出考虑非线性共同作用的预应力锚杆支护桩的挠曲微分方程,应用有限差分法计算预应力锚杆支护桩的位移和内力。实例计算表明,计算结果能更好地满足工程实际的要求。
英文摘要：
Considering the nonlinear interaction between soil and supporting-structure in soil layers for deep excavation designs,p-y curves of supporting pile and soil was proposed according to concentrated force spring model.Based on piles shaft deflection differential equation of the general elastic foundation beam and considering that the deformation of anchor is compatible with the anti-slide pile＇s deformation,a differential equation of the piles with prestressed anchor cables considering the nonlinear interaction is derived.Adopting finite difference method to calculate internal force and deflection of supporting piles.Finally,in comparison with the other methods,the calculated results of engineering example indicate that this paper is satisfied for engineering calculation.
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