人民黄河
人民黃河
인민황하
Yellow River
2014年
1期
121-123
,共3页
魏晓斌%周宜红%黄耀英%李金河%郑晓晖%田开平
魏曉斌%週宜紅%黃耀英%李金河%鄭曉暉%田開平
위효빈%주의홍%황요영%리금하%정효휘%전개평
泄洪洞%高性能混凝土%热膨胀系数%自生体积变形%无应力计
洩洪洞%高性能混凝土%熱膨脹繫數%自生體積變形%無應力計
설홍동%고성능혼응토%열팽창계수%자생체적변형%무응력계
spillway tunnel%high-performance concrete%thermal expansion coefficient%autogenous volume deformation%non-stress meter
泄洪洞衬砌混凝土必须具有防冲耐磨等特性,因此常采用掺硅粉高性能混凝土。在某特大型水电工程的泄洪洞边墙衬砌混凝土中埋设无应力计进行掺硅粉高性能混凝土应变监测试验,分别采用常规最小二乘法以及无应力计测值统计模型进行掺硅粉高性能混凝土热膨胀系数和自生体积变形反演。分析表明:两种方法反演的热膨胀系数较接近,在7.5×10-6/℃左右;高性能衬砌混凝土自生体积变形呈收缩型,单调递减,后期基本稳定在-20×10-6。
洩洪洞襯砌混凝土必鬚具有防遲耐磨等特性,因此常採用摻硅粉高性能混凝土。在某特大型水電工程的洩洪洞邊牆襯砌混凝土中埋設無應力計進行摻硅粉高性能混凝土應變鑑測試驗,分彆採用常規最小二乘法以及無應力計測值統計模型進行摻硅粉高性能混凝土熱膨脹繫數和自生體積變形反縯。分析錶明:兩種方法反縯的熱膨脹繫數較接近,在7.5×10-6/℃左右;高性能襯砌混凝土自生體積變形呈收縮型,單調遞減,後期基本穩定在-20×10-6。
설홍동츤체혼응토필수구유방충내마등특성,인차상채용참규분고성능혼응토。재모특대형수전공정적설홍동변장츤체혼응토중매설무응력계진행참규분고성능혼응토응변감측시험,분별채용상규최소이승법이급무응력계측치통계모형진행참규분고성능혼응토열팽창계수화자생체적변형반연。분석표명:량충방법반연적열팽창계수교접근,재7.5×10-6/℃좌우;고성능츤체혼응토자생체적변형정수축형,단조체감,후기기본은정재-20×10-6。
Concrete lining of spillway tunnel must have the characteristics such as erosion prevention,abrasion resistance and so on. So high-perform-ance concrete with ganister sand is commonly used. In this paper,a strain monitoring test of the high-performance concrete had been done on a south-western hydroelectric power project,in which there was a non-stress meter in the concrete used in the spillway tunnel. During the test,two methods were adopted,which were the common method of the least square technique and the method of building a model based on the statistical data from the non-stress meter,to get feedback of the thermal expansion coefficient and the autogenous volume deformation. The analysis shows that the thermal ex-pansion coefficients are very close to each other getting from the two methods,which are about 7. 5 × 10-6/℃. The autogenous volume deformation of the high-performance concrete has a shrinkage and monotonically decreasing and tends to be steady around -20 × 10-6 in the later period.