李家峡拱坝河床坝基混凝土腐蚀检测与分析  

Detection and Analysis on Corrosion of Arch Dam Foundation Concrete on Riverbed

作　　者：张毅[1] 李季[1] 李媛[1] 李永高[1] 

机构地区：[1]黄河上游水电开发有限责任公司,西宁810008

出　　处：《西北水电》2015年第4期49-54,共6页Northwest Hydropower

摘　　要：针对近年来李家峡拱坝坝肩及坝基不同廊道渗水析出物较多、大坝廊道底板混凝土表层存在明显的腐蚀破坏现象和地下水硫酸盐侵蚀等问题,在现场探查的基础上,开展坝基混凝土局部腐蚀采集样品性状多手段测试与分析,研究渗流水质作用下坝基混凝土局部腐蚀性状,结合监测资料分析,评价大坝河床坝基安全性态。结论是各坝段坝基渗流变化规律正常,尚未发现异常迹象,坝基工作性态正常。坝基的变形较大,主要是地质条件复杂,坝基变形模量低引起的。Aiming at much seepage in dam abutment and galleries, corrosion failure and sulphate corrosion from ground water on the sur- face of the floor concrete in the dam galleries. The local corroded concrete of the dam foundation is sampled, tested and analyzed. The corrosion and corrosion performance of the local dam foundation concrete acted by the seepage are studied. In combination with the analy- sis on the monitoring data, the safety of dam foundation on the riverbed is assessed. The study results present that the law of the seepage variation at the dam foundation sections is normal and the dam foundation operates normally. The larger deformation of the dam foundation is mainly caused by the complicated geological conditions and the lower deformation modulus of the dam foundation.

关 键 词：大坝 混凝土 腐蚀检测 分析 李家峡水电站 

分 类 号：TV33[水利工程—水工结构工程] TU37[建筑科学—结构工程]