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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。
As a new type of deep foundation pit supporting technology, prestressed anchor flexible support technology has been widely used in engineering. This paper describes its basic structure, and through the finite element numerical simulation, Best matching size. Based on the traditional limit equilibrium theory, the stability formula of foundation pit is deduced, and the deformation and slip field of foundation pit are studied based on the finite difference method. The calculation results show that the prestressed anchor flexible support technology can effectively control the deformation of the foundation pit and is especially suitable for the ultra deep foundation pit with strict deformation control.