可回收式锚杆抗拔试验研究

为了研究可回收式锚杆的锚固机制，结合实际边坡加固工程进行了不同长度锚杆的现场抗拔试验研究，得到可回收式锚杆的p-s曲线。分析结果表明：可回收式锚杆属于压力型锚杆，能较好地发挥锚固体材料的力学性能，承载力较高，防腐性能好，回收方便；该锚杆存在着一个临界长度，当锚固长度超过其临界长度时，再增加锚固长度对锚杆抗拔力的提高作用不大；该锚杆杆体在回收后不造成地下空间的污染，尤其适用于临时性和短期工程加固。试验验证了该锚杆设计的合理性和安全性，对该锚杆今后的工程应用具有参考价值。

Study of pullout tests of recoverable anchors

In order to study on the anchoring mechanism of the recoverable anchors, the p-s curves are obtained based on the pullout tests of the anchors with various lengths. The test results indicate that the recoverable anchor is a compression anchor and has good mechanical properties, high bearing capacity and good anticorrosive properties as well as it has the advantages of easy to be recovered. When the length of the anchor is large than a critical value, the anchor force will not be increased with the increasing of the length. The anchor does not pollute the underground space, especially adapts to be used in temporary strengthening and instantaneous strengthening. The test results verified the rationality and security of the anchor design. The result of this paper is a valuable reference for the future application of recoverable anchors.