地铁深基坑自旋锚杆支护作为一种安全可靠、经济可行、快速简便且可回收复用的基坑支护新技术，已在深基坑开挖支护过程中得到应用。由于深基坑支护系统服务期较短，在满足安全的前提下，应尽可能减少支护费用，降低支护成本。因此，研究自旋锚杆在基坑中的应用具有十分重要的现实意义。 本文通过理论推导、试验研究、数值计算三个方面，对自旋锚杆支护深基坑的变形与稳定等工作性能进行较为全面、深入地研究。总结了自旋锚杆支护体系的基本构成及其主要特点，对其构造进行了详细阐述，并指出自旋锚杆支护技术的适应范围及其优越性；得出自旋锚杆抗拔力公式和锚固段摩阻力分布曲线；经过研究发现自旋锚杆弹性模量与岩土体的弹性模量之比对锚杆荷载传递规律有重要影响；提高锚杆拉拔力的方法是：增加锚杆长度、增加锚杆公称直径和灌注水泥砂浆等粘结剂。 结合西安地铁2号线TJSG-4标深基坑自旋锚杆支护技术的应用，笔者采用有限差分FLAC3D计算软件对基坑开挖全过程进行数值模拟分析，结果表明：自旋锚杆支护体系下基坑坑壁水平位移和地表沉降均呈曲线分布且相互对应；自旋锚杆对基坑滑移场产生较大影响，自旋锚杆施加后，基坑潜在滑移区不断缩小，工程实际表明自旋锚杆支护体系下的深基坑是安全可靠的；对基坑稳定性最有影响的土体参数为：容重、内摩擦角、粘聚力三个传统参数，锚杆参数为：自旋锚杆公称直径、锚杆安装倾角和锚杆倾斜角度三个设计参数，而喷射混凝土面层的强度与厚度对基坑的稳定与变形影响不大。 本文深入地分析了自旋锚杆在地铁深基坑中的受力性能，总结出自旋锚杆适用于低强度结构岩体、低塑性土体以及中、细砂层，为进一步研究深基坑自旋锚杆支护力学性能及稳定问题打下了良好的基础。

As a new technology of safe and reliable, economically and feasible, fast and easy excavation, recoverable, the Spinning Anchor Bolt Supporting System has been widely used in the deep foundation Pit. However, the supporting expense and the supporting cost should be reduced as far as possible under the safe premise because of its shorter servicetime, and to recycle anchor bolt is not only a good method to save the cost, but simultaneously also may make the resources use again. Therefore, it has extremely important practical significance to study the application of recuperative anchor bolt in the deep foundation pit. This paper researches on the working performance such as the deformation and stability of spinning anchorbolt supporting deep foundation pit by theoritical derivation,experimental study,simulation calculation.It summarizes the basic components of spinning anchor bolt supporting system and its main properties,describes its structure in detail,points out its application scopes and surperiority;obtians the formula of Spinning Anchor Bolt’s pullout force and the anchoring section’s frictional resistance distribution curves;concludes that the ratio of spinning anchor bolt’s elastic modulus to rock’s elastic modulus has great influence on the bolt’s resistence distribution rule;the mehtod of improving the bolt’s pullout force is to lengthen bolt,increase bolt’s diameter and fill cement mortar etc. Integrating with the application of spinning anchor bolt in xi’an line 2 TJSG-4 deep foundation Pit,the author calculates the whole prosess of foundation pit excavating by FLAC3D,the result shows: under the spinning anchor bolt support,the curves of pit wall’s level displacement and groud surface settlement is mutually corresponding,spinning anchor bolt has great influence on the foundation pit displacement field,after constructing the spinning anchor bolt, the potential slip zone decrese;engineering proves that deep foundation pit is safe under the spinning anchor bolt support system.The mainly influeneing factors of foundation pit’s stability contains bulk density,friction angle and cohesive force of soil; diameter,installing obliquity,titling angle of Spinning Anchor Bolt.Moreover,the stength and the thickness of shotcrete surface-layer on the load-bearing capacity and deflection of foundation pit is comparatively lesser. The performance of Spinning Anchor Bolt Supporting in the deep foundation Pit of underground is analyzed exactly in this paper. Summarizes, the Spinning Anchor Bolt to be suitable for the low intensity structure rock mass, the low plastic soil body , the granulated or thin sand.This paper will play a basic role in the further study on forcing property and stability of the Spinning Anchor Bolt Supporting System in the deep foundation Pit.