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针对按照传统水泥土挡墙稳定性分析方法来计算MC桩组合支护结构稳定性的不足,根据极限平衡理论,结合MC桩组合支护结构的特点,建立了新的抗倾覆稳定性计算方法,分析了不同因素对组合支护结构抗倾覆稳定性的影响。结果表明,C桩宜布置在组合支护结构前侧,转动点位置宜选取在C桩桩端以上,并可适当增加M桩的长度、宽度以及C桩长度来提高稳定性。最后,运用分析的结果和实际工程经验,建议了MC桩组合支护结构的设计参数。
According to the theory of limit equilibrium and combined with the characteristics of MC pile composite support structure, a new calculation method of anti-overturning stability is established in order to calculate the stability of MC composite support structure according to the stability analysis of traditional cement-soil retaining walls. The influence of different factors on the anti-overturning stability of the composite support structure is analyzed. The results show that the C pile should be arranged on the front side of the composite support structure, the rotation point should be chosen above the C pile tip, and the length, width and C pile length can be increased appropriately to improve the stability. Finally, based on the analysis results and practical engineering experience, the design parameters of the combined support structure of MC pile are proposed.