摘要
彭水水电站地下厂房引水隧洞和尾水隧洞布置在KW51、W84两大岩溶系统之间,由于受地质条件制约,流道及附属洞室群均穿过岩溶系统。因地下厂房洞室群规模较大,厂区岩溶发育且规模大、性状复杂,因此施工难度大,施工安全问题尤为突出。在施工过程中根据岩溶的性状,采取了分高程、多工作面的施工方案,在超前预探、动态监测、控制释放等措施保护下,对岩溶系统进行了清挖、置换回填、灌浆加固、深层锚固、喷混凝土封闭等处理措施,有效地保证了施工安全及进度,为复杂岩溶地区的地下电站建设取得了成功的案例及有益的经验。
The inclined tail -water tunnel with 14 m diameter is applied for water diversion in the underground powerhouse of Pengshui Hydropower Station. Limited by flow passage arrangement and geological condition, the main powerhouse is arranged between 2 large karst systems of KW51 and W84 and parallel to the strata strike, and the flow passage and the attached tunnels group pass through the karst system. Due to large - scale tunnel group of the underground powerhouse, developed and complicat- ed karst system in powerhouse area, difficulties existed in the construction, especially the problem of construction safety. In the construction process, in the light of karst characteristics, the construction scheme of elevation division and multiple construction zones was adopted, with the protection measures of pre - detection, dynamic monitoring, controlled release etc. , the karst system was treated with the measures of excavation, replacement and backfill, grouting for consolidation, deeply anchoring, concrete pouring for closure etc. , the construction safety and progress were guaranteed effectively.
出处
《人民长江》
北大核心
2011年第23期58-61,共4页
Yangtze River
关键词
复杂岩溶
岩溶处理
围岩稳定
地下厂房
彭水水电站
complicated karst
karst treatment
surrounding rock mass stability
underground powerhouse
Pengshui Hydropower Station
