施工技术 2012年12月下 62 CONSTRUCTION TECHNOLOGY 第41卷第379期 复杂地质条件下扩孔式锚杆施工技术 肖合顺，刘献伟，李娟，周月，石伟 (中建三局第一建设工程有限责任公司，湖北武汉430040) [摘要]福州某工程地质条件复杂，采用传统锚杆进行支护，施工过程中发生了塌孔、堵孔、锚杆成型后无法满足设 计要求的抗拉拔力等问题.经过研究后，首先对错杆进行设计优化，增设锚杆导向装置；其次在锚杆自由段成孔时 采用钢套管引孔、PVC管护孔技术以防塌孔；最后错杆下锚时选用两种不同方法.通过采用以上施工技术克服了 地质条件复杂多样等因素，成功解决错杆施工中的众多难题. [关键词]地下工程；锚杆；塌孔；堵孔；导向头；引孔 [中图分类号]TU753.1 [文献标识码]A [文章编号]1002-8498(2012)24-0062-02 Construction Technology of Reaming Anchor in Complex Geological Condition Xiao Heshun Liu Xianwei Li Juan Zhou Yue Shi Wei (The First Construction Engineering Limited Company of China Construction Third Engineering Bureau Wuhan Hubei 430040 China) Abstract:A project in :Fuzhou is featured with plex geological condition and was supported by traditional anchor.During construction some problems occurred including hole collapse hole filling insufficient pulling resistance of the anchor after forming.After study to these problems the anchor was firstly optimized and a guiding equipment was added.Secondly when holes were formed for the free segment of the anchor steel sleeve pipe was used as guiding hole and PVC pipe as protecting hole to prevent hole collapse.Finally two different methods were used to send the anchor.These measures successfully solved the many problems of reaming anchor construction in plex geological condition. Key words:underground;anchor;hole collapse;hole filling;guiding end;guide hole 1工程概况 防塌孔；最后锚杆下错时选用两种方法：一为复钻 福州世欧澜山园工程为一大型住宅小区，其技术，即下锚前二次钻孔再注浆；二为利用螺杆压 基坑支护工程采用扩孔式预应力铺杆.基坑支护 缩机...
复杂地质条件下扩孔式锚杆施工技术.pdf
