（1 山东建筑大学土木工程学院 济南 250101；2 山东建大工程鉴定加固研究所 济南 250014）

［提要］介绍了复合土钉技术（微型桩+土钉）在饱和粉土基坑支护中控制建筑物变形的实用设计方法及施工措施。通过现场试验，对比分析了复合土钉与普通土钉技术控制边坡变形的效果。分析表明，采用复合土钉支护的边坡变形比普通土钉支护的减小了40%～60%。实践证明，复合土钉支护技术能有效控制基坑位移。

［关键词］邻近建筑  饱和粉土  复合土钉(土钉＋微型桩)  控制变形

Applied Study on Composite Soil Nailing Technique in Saturated Mealy Soil/Chen Qihui1，2, Zhang Xin1，2, Sun Jianping1，2, Guo Qiuying1, Zhu Jian2 (1 College of Civil Engineering，Shandong Jianzhu University, Jinan 250101, China; 2 Research Institute of Engineering Appraisal and Reinforcement, Shandong Institute of Architecture and Engineering, Jinan 250014, China)

Abstract:The composite soil nailing technique is adopted in foundation pit support design for controlling buildings and slope displacement, and the measurement of construction in saturated mealy soil is introduced. The effect of technique of composite soil nailing is compared with general soil nailing by actual trail and observation, and it is concluded that the slope displacement is reduced 40%～60% using the technique. It is proved that the displacement of excavation is controlled effectively by composite soil nailing.

Keywords:adjacent buildings; composite soil nailing; saturated mealy soil; controlling displacement

*建设部科技计划项目资助(基于变形控制的基坑组合支护技术的应用研究(05-k1-14))。