永德县马鞍桥岩溶水库成库条件评价  

Evaluation of reservoir formation conditions of Maanqiao karst reservoir in Yongde County

作　　者：龚志明 Gong Zhiming(XPCC Surveying&Designing Institute(Group)Co.,Ltd.td.,Shihezi 832000,China)

机构地区：[1]新疆兵团勘测设计院(集团)有限责任公司,新疆石河子832000

出　　处：《工程勘察》2022年第11期49-56,共8页Geotechnical Investigation & Surveying

摘　　要：从地形地貌、地层岩性、地质构造、水文地质条件等方面分析论证马鞍桥水库存在沿灰岩条带向北东(向下游方向)和河湾地块班老洼地岩溶渗漏问题。该水库在河谷水动力类型为补排型,河流的右岸地下水补给河水,左岸灰岩存在地下水低槽带,排泄地下水,岩溶地下水排泄基准面高程1400~1410m,远低于设计正常设计蓄水位,其岩溶溶隙裂隙产生的年渗漏量为694×10~4m~3和经f1断层及可溶岩与非可溶岩接触带产生的年渗漏量达(1292~2154)×10~4m~3,局部可能存在岩溶管渗漏,年渗漏量为(1157~2082)×10~4m~3。两者均大于坝址区多年平均年径流量,为严重渗漏。由于左侧无相对稳定的隔水层存在,采用垂直防渗方案不成立,只有在库区灰岩区进行水平防渗处理后,水库才具备成库条件。From the aspects of topography,stratum lithology,geological structure and hydrogeology,the problem of leakage in karst exists in the northeast downstream along the limestone strip and the old depression.The reservoir is a hydrodynamic type in the valley,and the groundwater on the right bank of the river to recharge the river.There is a lower discharging zone in limestone in the left bank,and the discharging elevation of karst groundwater is 1400~1410 m,which is much lower than the designed normal storage level.The annual leakage amount of the karst fissure is 694×10~4m~3.The annual leakage amount produced through the fault No.f1 and soluble rock and non-soluble rock contacting zone reaches(1292~2154)×10~4m~3.Karst leakage of channel type maybe exist locally with annual leakage is about 1157×10~4m~3 to 2082×10~4m~3.Both leakages are greater than the annual average annual runoff at the dam site area,which is serious.Because there is no relatively stable water separation layer on the left,the vertical seepage prevention scheme is not feasible,only after the horizontal seepage prevention is carried out in the limestone area of the reservoir area can the reservoir meet the reservoir forming conditions.

关 键 词：水库 岩溶 渗漏 成库条件 评价 

分 类 号：P642.254[天文地球—工程地质学]