论文部分内容阅读
李家峡水电站位于青海省东南部,距上游龙羊峡水电站约为108.6km,是黄河上游重点工程之一.坝址区两岸山势陡峻,河谷狭窄,枯水期水面宽约30～50m.河床复盖层一般厚为3～9m,坝基基岩主要为前震旦系黑云母更长质带状混合岩和黑云母角闪斜长片岩.由于龙羊峡水电站已建成蓄水,且调节库容较大,控制了刘家峡以上约为2/3的来水量,因而李家峡水量稳定,洪水流量和泥沙含量都相对较小,使得李家峡工程施工时导截流方便,有利于降低造价,加速施工进度.
The Lijiaxia Hydropower Station is located in the southeastern part of Qinghai Province and is about 108.6km from Longyangxia Hydropower Station in the upper reaches, which is one of the key projects in the upper reaches of the Yellow River. The steep mountains and narrow valleys in the dam area lead to a water surface of 30-50m in the dry season. Generally 3 ~ 9m thick, the main bedrock of the former basement is the former Sinian biotite longer-banded mixed rock and biotite hornblende schist schist.Because Longyangxia Hydropower Station has built up water storage, and the control of large storage capacity, control Therefore, the water volume of Lijiaxia is stable, and the flood discharge and sediment content are both relatively small, which makes it convenient for the Lijiaxia Project to facilitate river closure during construction, which helps to reduce the cost and speed up the construction progress.