不可回收锚索拆除方法和技术控制

Technical Aspects of Non-Recyclable Ground Anchor Cable Removal

不可回收锚索即普通预应力锚索,受拉件主要由钢绞线制作。不可回收锚索施工后,将对其周边地下环境造成一定的影响,主要包括:对周边地块桩基础施工的影响、对周边地块基坑施工的影响、对周围边市政施工的影响、对盾构机施工的影响、对城市长远规划的影响。不可回收锚索的拆除方法和技术,存在一定的难度,可借鉴的成功案例较少。结合工程实例,从实际拆除的情况分析,论证不可回收锚索拆除方法和技术控制。

Non-retrievable ground anchor cables are conventional cables, and the tension parts are mainly made of steel strands. After the construction of non-recyclable anchor cables, it will have some negative impacts on the surrounding underground environments. These impacts mainly include:(1) the impact on the construction of the pile foundation in adjacent blocks;(2) the impact on the deep excavationactivities in adjacent areas;(3) the impact on the surrounding municipal construction;(4) the impact on the excavation construction of subway shielded boring machine;(5) the impact on the long-term planning of the city. There are some difficulties in the removal methods and techniques of non-recyclable anchor cables, and few successful cases were reported. This paper demonstrates the method and the technical aspects of the non-recyclable anchor cable demolition based on the analysis of an actual demolition project.