摘要
查龙水电站位于西藏自治区那曲地区境内怒江上游的那曲河上，海拔高程4250～4600m，平均气温-1.9℃，极端最低气温-41．2℃，极端最高气温22.6℃，最大风速26m／s，年平均风速2.9m／s，平均降水量415mm，最大结冰厚度1．0m，空气稀薄，严重缺氧，风沙大，属高海拔严寒地区,电站拦河主坝为钢筋混凝土面板砂砾石坝，大坝开挖以机械为主，以人工开挖为辅，坝体填筑材料采用天然砂砾石，填筑顺序为，先垫层科，后排水料，再堆石料，其中散方向平行于坝轴线，而两岸接被处则垂直于轴线方向．斜坡碾压是先价压两遍以稳定坡面，然后振动碾压8遍．混凝土面板采用无轨式滑模施工.低温时混凝土采用塑料薄膜遮盖，再加草袋或蓬布后进行保护，温度可提高3～5℃以上．
Chalong Hydropower Station is built on Naqu River, upstream of Nujiang River,Naqu area of Tibet Autonomus Region with a elevation above sea tevel of 4 350~4 600 m. The average temperature is - 1. 9℃, the extremely tow temperature -41. 2℃, the extremely high temperature 22. 6 ℃,the maximum wind velocity 26 m/s. the average annual wind velocity 2.9 m/s, the average annual precipitation 415 mm, the maximum ice thickness 1. 0 m. It belongs to the plateau and cold climate area with a thin air, serious tack of axygen and heavy dust storm. The dam across river of the station is a rein forced Concrete face rockfill dam. It takes the mechanical excavation as main and manpower excavation as supplementary in the censtruction. The filling materials of dam body is natural Sand-gravel. The filling sequence is firstly bedding materials, secondly filter materials and thirdly rock-fill materials. In the slope compaction, the two static rollings were adopted firstly for stabiliting the slope and then vibrating rolling of 8 times. Reinforced concrete face slab was constructed by the railless sliding form method. When it is cold, the concrete was covered with plastic membrane and then proteeted with a superstratum of grass bags or canvas, which the temperature would increase 3~5 ℃.
出处
《水利水电技术》
CSCD
北大核心
1996年第8期68-74,共7页
Water Resources and Hydropower Engineering
关键词
混凝土
面板砂砾石坝
工程施工
严寒地区
plateau and cold climate area a reinforced, concrete face rockfill dam, construction
