玉滩水库坝址工程地质勘察与评价

Geological Investigation and Assessment on Dam Site of Yutan Reservoir Extension Project

玉滩水库建筑物较多,有主坝、副坝、溢洪道和灌溉引水隧洞等;其地处四川盆地红层地区,砂岩泥岩相间分布,岩质较软,软弱夹层发育,并发育石膏脉,岩石工程性质和水理性质较差,工程地质条件独特。对主要工程地质问题勘察和评价进行了初步分析和总结,对于同类型工程具有借鉴意义。

Main structures of the Yutan Reservoir Extension Project include main dam,auxiliary dam,spillway and irrigation diversion tunnel,etc..They are situated in redbed area of Sichun basin,with intercalation of sandstone and mudstone,the rocks are soft,weak interlayer and gypsum are developed with poor engineering and physical property.This text gives a preliminary analysis and summary of the geological investigation and assessment,which has certain reference on similar projects.