摘要
东庄水库工程勘察设计论证工作几起几落,都因岩溶渗漏问题而停滞,历经4年再次勘察试验研究,进一步论证了东庄水库碳酸盐岩库段不发育古岩溶。泾河形成于1.4 MaB.P,区域性地壳抬升速率达1.55 mm/年,新岩溶发育轻微。同时由于受老龙山断裂和沙坡断层制约,岩溶发育深度有限,其发育规律主要受构造、风化卸荷作用控制,两岸分水岭地段深岩溶不发育,地下水位接近或高于水库正常蓄水位,而且20世纪60年代还是地下水补给河水,库坝段形成悬托河时间短,岩体渗透性微弱,水库淤积防渗功能显著,水库渗漏量小,在坝区采取常规防渗处理,即可把渗漏控制在允许范围内。
The investigation and design of Dongzhuang reservoir has been paused for several times by karst leakage problem. After 4 years, the reservoir is studied again. And it is proofed that paleokarst is not widespread in Dongzhuang reservoir,Jinghe River formed at 1.4 MPa B. P,the regional crustal uplift rate is 1.55 mm/a,and the young karst develops slightly. Restricted by the Laolongshan fracture and Shapo fault, karst is not deep and its development is mainly controlled by geological structure and rock weathering and unloading effect. Watershed area of each bank of reservoir has weak deep karst, and groundwater level is close to or higher than the normal water level of the reservoir. Further, the river is recharged by groundwater in 1960s. Suspended river, formed by dam, is not exists for long time. And the permeability of rock mass is weak. Because of significantly reservoir sedimentation effect, there is a weak leakage for Dongzhuang Reservoir. All the factors above make that the seepage of the reservoir could be controlled within permissible tolerance by conventional seepage prevention.
出处
《资源环境与工程》
2014年第4期449-455,共7页
Resources Environment & Engineering
关键词
东庄水库
岩溶轻微
渗漏微弱
常规防渗
Dongzhuang reservoir
slightly karst
weak leakage
conventional seepage prevention
