高混凝土坝原型观测中无应力计异常现象研究  

Abnormal Phenomenon of Non-stress Strain Gauges in Observation of High Concrete Dams

作　　者：王志远[1] 潘琳[1] 沈慧[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《水电自动化与大坝监测》2010年第6期42-45,共4页HYDROPOWER AUTOMATION AND DAM MONITORING

基　　金：江苏省自然科学基金资助项目(BK2009479)

摘　　要：从小湾和拉西瓦2座高拱坝实测资料出发,论证了部分无应力计异常的判断方法、标准、成因及资料处理意见。分析认为,对于高混凝土坝应力观测而言,现行无应力计筒存在筒深不足和抗外压能力偏低的弱点,有必要加以改进。无应力计测值异常现象具有一定的普遍性,在今后高坝应力应变观测中应予以研究和改进。Based on the observed data of two high arch dams,Xiaowan Arch Dam and Laxiwa Arch Dam,the method to identify the abnormal phenomenon of some non-stress strain gauges installed in the two dams,the standards,causes and how to deal with these abnormal values are discussed.Through analysis,for the stress monitoring of high concrete dams,there are some disadvantages in the current buckets used in the monitoring of non-stress strain,such as low depth of the buckets and weak strength of the bucket walls,and they should be improved.The abnormal phenomenon of the non-stress strain gauges is common in high concrete dams and should be studied and improved in future.

关 键 词：高混凝土坝 无应力应变 自生体积变形 无应力计异常 

分 类 号：TV642[水利工程—水利水电工程]