陈启辉  孙剑平  柏宏宇
    （山东建工学院土木工程学院  济南 250014）

[提要]  针对土钉支护技术在软土基坑中存在边坡位移较大、安全程度降低等问题，确定在软土和填土基坑中采用复合土钉支护技术进行基坑支护方案的设计与施工，以限制基坑边坡的变形。通过现场试验与监测，对比分析了普通土钉支护与复合土钉支护效果。工程实践证明，复合土钉支护技术能有效地控制基坑位移。
[关键词]  深基坑支护  复合土钉  杂填土  淤泥质土

When soil nailing technique is applied in soft soil, the displacement of slope of foundation pits is increased and the security of slope is brought down. The composite soil nailing technique is adopted for design and construction in the soft soil and fills foundation pits, and the effect of composite soil nailing is compared with general soil nailing. In practice, displacement of excavation pits is controlled effectively by composite soil nailing.
Keywords: foundation pits; deep excavation support; composite soil nailing; fills; muddy clay