摘要
以郑州中原万达广场基坑支护工程为算例,通过理论计算与FLAC3D数值模拟分析得到单纯土钉墙支护体系、直径120mm钢管微型桩及直径400mm钢筋混凝土小桩复合土钉墙支护体系的应力场和位移场.经对比分析发现,直径400mm的钢筋混凝土小桩复合土钉墙支护结构较前两种支护结构抗变形能力得到大幅提高.建议本工程支护结构设计时,应对复合土钉墙基坑支护技术规范进行相应的折减系数调整.
This study was based on the example of foundation pit supporting project of central plains Wanda square in Zhengzhou. The stress field and displacement field of single soil-nailed wall pile supporting, micro pile of 120 mm diameter and the concrete pile of 400 mm diameter in composite soil-nailed wall pile supporting system were obtained by the theoretical calculation and FLAC^3Dnumerical simulation analysis. Through comparison and analysis, it proved the enforcement effect of 400 mm diameter concrete pile on the composite soil-nailed wall pile supporting system. This study suggests the coefficient of specification for technical code for composite soil nailing wall in retaining and protection of excavation should be adjusted accordingly.
出处
《河南大学学报（自然科学版）》
CAS
北大核心
2014年第5期620-624,共5页
Journal of Henan University:Natural Science
基金
国家自然科学基金资助项目(51178165)
