Composite soil- nailed walls were developed from soil nailing technology, which have been applied on complicated geology conditions. According to computational analysis of 11 projects constructed in Shanghai and other regions, the principle curves between the intensity data in soil body c, φ and the reduction coefficient 1, 7}, the base stability factors were analyzed. The intensity data in soil body and pile length effect on stability of foundation ditch, the interaction mechanism, the contribution features of nails, anchors, mixing piles, micro-piles were also analyzed. The values of L and ζ and 97 were recommended by the statistical method. It provides a reference to engineering applications.%复合土钉墙是在土钉墙技术基础之上的发展与改进,适用于较复杂的工程地质条件.通过对上海等地区11个工程实例计算分析,得出复合土钉墙土体强度指标c,Φ值与整体稳定性系数的规律曲线,折减系数ξ,η与基坑稳定性系数的规律曲线,土体强度指标、桩长对基坑稳定性的影响,以及土钉、锚杆、搅拌桩、微型桩对基坑稳定性的贡献,推出软土复合土钉墙搅拌桩和微型桩有效桩长L,ξ,η取值范围,为工程应用提供参考依据.
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