FAST台址岩溶洼地的排水对策

Countermeasures for drainage of karst depression for substrate of FAST

FAST射电望远镜(Five hundred meters Aperture Spherical Radio Telescope)是以贵州山区岩溶洼地作为台址的大型工程。该洼地在开挖施工后,在暴雨条件下采用原有的落水洞进行消水,将会产生4.3 m的积水深度,会对工程产生严重影响。通过计算设计建立起的边坡排水沟、消能池、排水隧道等综合排水系统,可以有效地解决洼地内涝问题。该方法能够为今后在岩溶洼地进行工程项目的排水处理提供相关的技术措施与经验。

FAST（ Five hundred meters Aperture Spherical Radio Telescope） radio telescope project is a huge project that takes a karst depression in the mountainous region of Guizhou Provence as its substrate. After the excavation of the depression,the original sinkhole is adopted to drain water from the depression under the condition of rainstorm,from which the waterlogging with the depth of 4. 3m is to created,thus a serious impact on the construction of the project is to be caused. Through the relevant calculation and design,a comprehensive drainage system that includes slope drainage ditch,energy dissipation pool,drainage tunnel is established,and then the problem of the waterlogging within the depression is effectively solved. This method can provide some technical measures and experiences for the construction drainage of the project implemented in a karst depression in the days to come.