浅议盾构区间锚索处理技术应用

Discussion on Application of Cable Anchor Theatment Technology in Shield Zone

针对盾构时锚索侵入到盾构隧道洞身范围的情况,提出了电腐蚀锚索处理、跟管钻进套取锚索、旋挖钻切断锚索三种处理方案,在分析了各方案优缺点的基础上,选择了旋挖钻切断锚索方法,并以珠江三角洲城际快速轨道工程广州至佛山段二期工程为例,通过实际工程验证了旋挖钻切断锚索方法的适用性及可行性,并提出了锚索处理方案的选用原则,为今后类似工程提供指导和借鉴。

During shielding process, the anchor cable will intrude into the shield tunnel body. Three corresponding treatment measures, namely electro-erosion cable treatment, extracting anchor with pipe cased drilling and cutting anchor by rotary drilling, are proposed in this paper. Based on the analysis of both advantages and disadvantages ofeach scheme, the method of cutting anchor by rotary drilling, is selected. The feasibility and applicability of cuttinganchor by rotary drilling are verified through a practical engineering example, which located in Guangzhou-Foshansection II of intercity rapid track project at Pearl River delta. Moreover, the principles for selection of anchor cabletreatment scheme are proposed in this paper, which provides guidance and reference for similar projects in thefuture.