400m级超深竖井导井定向纠偏施工技术

Construction Technology of Directional Deviation Correction of 400m Class Ultra Deep Vertical Shaft

阳江抽水蓄能电站引水上、下竖井通过的岩性均为燕山三期中粗粒花岗岩。引水上竖井深382 m,存在多条较大断层及断裂带,最不利条件下的扩挖过程中存在超欠挖问题。结合上述具体案例,分析一种定向纠偏钻井设备施工,针对其施工原理、施工工艺展开详细的探讨,以实现快速、经济、质量的施工目的。

The lithology through the upper and lower shafts of Yangjiang pumped-storage power station is Yanshan-Ⅲ medium-coarse granite. The depth of the vertical shaft on the diversion water is 382 m, there are several large faults and fault zones, and the problem of over-excavation and under-excavation exists in the process of excavation expansion under the most unfavorable conditions. Be combined with the above specific cases, this paper describes a directional deviation correction drilling equipment construction, in view of its construction principle, construction technology launched a detailed discussion, in order to achieve rapid, economic, quality of the construction purpose.