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弹性地基梁理论应用的基本条件是土体为稳定体,且排架微型桩组合结构对不稳定坡体有改善作用。在弹性地基梁理论基础上,借鉴一般微型桩水平承载力的计算思路,以拟静力法计算施加地震荷载,在考虑桩土作用的情况下,以四种基本计算模型建立排架微型桩组合结构的计算公式,并通过实例计算探讨了排架微型桩组合结构的内力及对地震力的特殊反应。结果表明,排架微型桩组合结构中,后排桩的存在为前排桩提供了一个稳定的抵抗滑坡推力的条件,同时连系梁的存在将桩与桩间土体组合在一起,充分发挥了土体的抗剪能力,提高了结构的抗滑能力,削弱了地震力对边坡稳定的影响,提高了工程的安全性。
The basic condition for the application of elastic foundation beam theory is that the soil is a stable body, and the combined structure of the mounts and micropiles can improve the unstable slope. On the basis of the theory of elastic foundation beam, referring to the calculation principle of horizontal bearing capacity of general miniature pile, the seismic load is calculated by quasi-static method. Under the condition of considering the effect of pile and soil, four basic calculation models Structure calculation formula, and through the example calculation to explore the internal force of the micro-pile structure and the special response to the seismic force. The results show that the existence of the rear piles provides a stable condition for the thrust of the front piles to resist the landslide thrust in the micro-piles combined structure, and the presence of the connecting beams combines the piles with the soil between the piles to give full play The shear capacity of soil improves the skid resistance of the structure, weakens the influence of seismic force on slope stability and improves the safety of the project.