观音阁水库选坝过程中岩溶勘察与研究

Karst Reconnainssance and Investigation in the Course of Site Selection for Guanyinge Reservoir

观音阁水库位于太子河沉降带，广泛发育有寒武系、奥陶系灰岩，岩溶十分发育，在选坝过程中先后选择了六条对比坝线，可研阶段对三、四、六三条坝线进行了对比，通过区域及坝址的岩溶研究，论证了库首及坝下渗漏问题，并对三条坝线的岩溶发育特点及帷幕处理进行了评价，最后选出六坝线作可研阶段的推荐坝线，利用张夏灰岩作持力层，凤山组页岩作隔水层。水库建成后，没有发现坝下及绕坝渗漏问题。

Guanyinge Reservoir is situated in the cenral region of settlement belt of Taizi River, Cambrian and Ordovician System limestone is widely spread, and Karst is very developed. In the course of site selection, there are six lines taken into consideration to situate the dam. In the feasibility study, the third, the fourth, and the sixth lines were contrasted more deeply. The Krast problem in the related region and dam site was studied, an appraisal of the characteristics of Karst development and curtain treatment were made. Finally, the sixth line was recommended, with Zhangxia limestone as the supporting base, Fengsan shale as the water resisting layer, There has been no seepage below dam or by pass seepage after the reservoir was built.