仙游抽水蓄能电站下水库闸门井开挖支护技术.pdf

2011年6月下 施工技术 第40卷第343期 CONSTRUCTION TECHNOLOGY 27 仙游抽水蓄能电站下水库闸门井开挖支护技术 刘玉莲 (武警水电第二总队七支队，江西鹰潭335000) 【摘要]仙游抽水蓄能电站下水库闸门井采用反井钻机开挖导井、潜孔钻及手风钻相结合扩挖的方法进行施工，实 际施工中不断优化，获得了较好的施工效果.结合仙游抽水蓄能电站下水库闸门井开挖施工，介绍导井、锁口混凝 土、导井扩挖及堵井处理、闸门井支护等主要施工方法及主要安全措施. [关键词]抽水蓄能电站；闸门井；开挖：支护 [中图分类号]TV551.4 [文献标识码]A [文章编号]1002-8498(2011)12-0027-03 Excavation and Supporting Technology of the Lower Reservoir Gate Shaft of Xianyou Pumped Storage Power Station Liu Yulian No.7 Detachment No.2 Hydropower Foree of Armed Police Yingtan Jiangxi 33500 China) Abstract:The lower reservoir gate shaft of Xianyou Pumped Storage Power Station is excavated with binative method of excavating guiding well with drilling machine and bination expansive excavationg using pneumatic drills and hang drills.The excavatin method is optimized continuously during construction and good construction effect is gained.Based on the lower reservoir gate shaft excavation of Xianyou Pumped Storage Power Station the main construction methods of guiding well locking concrete extended exeavation of guiding well treatment of well plugging as well as supporting of gate shaft are introduced.At the same time major security measures are expounded. Key words:pumped storage power station;gate shaft;excavation;supporting 1工程概况 丝绳穿过导孔在闸门井底面吊起开挖支护作业操作 仙游抽水蓄能电站位于福建省仙游县西苑乡，平台，在平台上进行钻孔、装药、临时支护等作业，最 为周调节抽水蓄能电站，属一等大(1)型工程，下后自上而下进行全断面扩挖.该方案施工时施工人 水库位于上游溪口溪峡谷中，主要施工项目包括尾员安全问题难以保证，且扩挖施工耗费人力、物力， 水隧洞、大坝、溢洪道、库盆及库岸防护等.两条尾成本较大. 水隧洞呈平行布置，典型断面为圆形，洞径8m 单洞 考虑到该洞段围岩状况较差，为...