摘要
小浪底水库运行以来,左坝肩的渗漏水量偏大,当库水超过235m高程时,排水量急剧增加。将库水中D,18O,3H作为"事件"示踪剂,用来进行绕坝渗流场及渗漏通道的调查,配合人工示踪、连通试验等方法,查清渗漏水补给来源、渗漏层位等。天然示踪试验和连通试验证实:左坝肩帷幕下部的T3 11中存在强渗漏,库水入渗到T14,T13 1透水层,然后通过F28,F235,F238等断层补给到深部的T13 1,最后由揭露该地层的30#排水洞排出。
Since the operation of Xiaolangdi Dam, the leakage of left dam abutment has been very large. When reservoir water level exceeds elevation 235 m, the drainage discharge increases sharply. D, ()^(18)O, ()~3H and kinds of chemical compounds in reservoir water can be used as 'event' tracers to study seepage and leakage pathway of dam and dike. With artificial tracing detection and interconnection test, the supply resources of leakage water and leakage layer are found. Testified by natural tracing detection and interconnection test, the layer of T_1^(3-1) inside the left abutment is a strong leakage layer. At first, reservoir water flows into strata T_1~4 and T_1^(3-1), then discharges along faults F_(28), F_(235) or F_(238), finally leaks into deep T_1^(3-1). At last, the leakage water discharges into No.30 drainage gallery.
出处
《长江科学院院报》
CSCD
北大核心
2004年第2期14-17,共4页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金重点项目(50139030)
国家自然科学基金项目(50179009)
关键词
小浪底水库
天然示踪
环境同位素
渗漏
人工示踪
Nature tracer
environmental isotope
reservoir leakage
artificial tracer
