摘要
云南牛栏江-滇池补水工程地下泵站地处强岩溶区, 地表发育有大型溶洞、漏斗及伏流等岩溶形态, 地下发育有暗河管道、岩溶洞穴及强溶蚀带等。在该区域建设深埋大型地下泵站, 如何科学合理地避开岩溶发育带, 采取有效措施解决地下泵站施工中的岩溶涌水和坍塌, 是工程建设中的技术难题之一。通过研究干河地下泵站泵址区的岩溶特征及岩溶发育规律, 在地下泵站建设中采取的主要措施有3个①设计时将大跨度地下主厂房布置在弱岩溶带内, 避开强岩溶带、地下伏流及强溶蚀低槽带, 并将地下主厂房防渗帷幕设计底界确定在微岩溶带高程1 695 m以下10～20 m;②在主厂房地下洞室群施工开挖期间, 对较大强溶蚀带进行超前支护, 确保开挖安全顺利完成;③明确后期洞室运行安全监测重点地段。
Abstract
The underground pump station for the water replenishing project from Niulan River to Dianchi lake in Yunnan Province is located in strong karst area, with large-scale karst carves, funnels and underground rivers exposed on the surface as well as underground river pipeline, karst caves and strong dissolution belt developed underground. To avoid the karst development zone and take effective measures to solve the karst water burst and collapse is one of the technical problems in the construction. By analyzing the karst features and development regularities, we adopted three measures for the construction (1) the long-span underground main power house is built in weak karst area to avoid underground river and strong corroded groove, and the bottom boundary of anti-seepage curtain for the underground main power house is determined 10-20m below the 1 695m elevation of micro-karst area; (2) forepoling is employed for large strong karst area before the excavation of underground caverns; (3) areas of safety monitoring for the power house’s operation are decided.
关键词
地下泵站 /
岩溶问题 /
超前支护 /
防渗底界 /
安全监测
Key words
underground pump station /
karst problem /
forepoling /
seepage-proofing bottom boundary /
safety monitoring
赵发辉, 苏红兵, 姜顺龙.
牛栏江干河地下泵站建设中的岩溶问题[J]. 长江科学院院报. 2014, 31(6): 78-82 https://doi.org/10.3969/j.issn.1001-5485.2014.06.0162014, 31(06):78-82
ZHAO Fa-hui, SU Hong-bing, JIANG Shun-long.
Karst Problems in the Construction of UndergroundPump Station on Niulan River[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(6): 78-82 https://doi.org/10.3969/j.issn.1001-5485.2014.06.0162014, 31(06):78-82
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参考文献
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[3] 陈 绩, 陈兴聪. 牛栏江-滇池补水工程初步设计报告[R]. 昆明:云南省水利水电勘测设计研究院, 2010.(CHEN Ji, CHEN Xing-cong. Preliminary Design Report for the Water Replenishing Project of Niulan River and Dianchi Lake [R]. Kunming: Yunnan Provincial Water Conservancy and Hydropower Survey and Design Research Institute, 2010. (in Chinese))
[4] 梅 伟. 干河泵站地下厂房防渗排水体系设计[J]. 人民长江, 2013, 44(12):24-26.(MEI Wei. Seepage Control and Drainage System Design for Ganhe River Pumping Station’s Underground Powerhouse [J]. Yangtze River, 2013, 44(12):24-26. (in Chinese))
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