摘要
预应力锚杆柔性支护技术作为一种新型的深基坑支护技术在工程中得到了广泛应用,本文对其基本构成进行了阐述,通过有限元数值模拟得到了锚下承载结构各个构件的最佳匹配尺寸。基于传统的极限平衡理论推导了基坑稳定计算公式,基于有限差分法对基坑变形和滑移场进行了研究。计算结果表明,预应力锚杆柔性支护技术能有效控制基坑变形,特别适用于变形控制严格的超深基坑。
The prestressed anchor flexible retaining method for deep foundation pit has been widely used in recent years. The basic compositions are expounded, and the optimum combination of each component to the anchor head bearing structure is proposed by using the finite element method. Based on traditional limit equilibrium ~heory, the formulary for the stability analysis is deduced. The deformation of foundation pit and the critical sliding zone are analyzed by finite difference method, Numerical modeling results indicate that the prestressed anchor flexible retaining method could control the deformation of foundation pit effectively, especially to the strict deformation controlling of the super-deep foundation pit,
出处
《工程勘察》
CSCD
北大核心
2007年第12期24-28,共5页
Geotechnical Investigation & Surveying
关键词
深基坑
预应力锚杆
柔性支护
稳定
变形
deep foundation pit
prestressed anchor
flexible retaining
stability
deformation
