Monitoring index for deformation of face rockfill dam based on safety factor method

doi:10.16265/j.cnki.issn1003-3033.2020.02.020

Abstract

Abstract: In order to solve the problem that grade and importance of dams are not considered in monitoring index of dam deformation, firstly, finite element strength reduction method was used to establish relationship between anti-sliding safety coefficient and stream and downstream water levels of face rockfill dams. The latter were obtained based on safety factor of dam slope which was determined by dam grade and importance, and hydraulic pressure displacement of dams was calculated. Secondly, three-parameter rheological model of rockfill material was used to calculate time-dependent displacement of dams according to construction process, water storage and operation plan. Finally, with a face rockfill dam as an example, first-level monitoring index for dam deformation was drawn up. The results show that the proposed method based on safety factor can make up for defects of conventional analysis method which lacks consideration of dam grade and importance, and it can improve theory and practical method for drawing up monitoring index for deformation of earth-rock dams.

Key words: face rockfill dam, deformation, monitoring index, safety factor, strength reduction

CLC Number:

X924.2

WU Xianghao, LIU Junru. Monitoring index for deformation of face rockfill dam based on safety factor method[J]. China Safety Science Journal, 2020, 30(2): 127-132.

References 15

[1]	吴中如.水工建筑物安全监控理论及其应用[M].北京:高等教育出版社,2003: 360-361.
[2]	吴中如,卢有清.利用原型观测资料反馈大坝的安全监控指标[J].河海大学学报:自然科学版,1989,17(6): 29-36.WU Zhongru, LU Youqing. Feedback analysis of safety-monitoring values of dams with available in-situ measurements[J].Journal of Hohai University:Natural Sciences,1989,17(6): 29-36.
[3]	顾冲时,吴中如,阳武.用结构分析法拟定混凝土坝变形三级监控指标[J].河海大学学报:自然科学版,2000,28(5): 7-10.GU Chongshi, WU Zhongru, YANG Wu. Determining grade three monitoring indicator of dam deformation with structural analysis method [J]. Journal of Hohai University:Natural Sciences,2000,28(5): 7-10.
[4]	蒋清华,马福恒,刘成栋.碗窑碾压混凝土坝变形成因分析及监控指标的拟定[J].中国安全科学学报,2007,17(4): 172-176.JIANG Qinghua, MA Fuheng, LIU Chengdong. Cause analysis of deformation and determination of monitoring index for wanyao RCC dam [J]. China Safety Science Journal,2007,17(4): 172-176.
[5]	雷鹏,肖峰,苏怀智.考虑区间影响因素的混凝土坝变形监控指标研究[J].水利水电技术,2011,42(6): 91-93.LEI Peng, XIAO Feng, SU Huaizhi. Study on concrete dam deformation monitoring and control index with consideration of interval influencing factors [J]. Water Resources and Hydropower Engineering,2011,42(6): 91-93.
[6]	LEI Peng,CHANG Xiaolin,XIAO Feng, et al. Study on early warning index of spatial deformation for high concrete dam [J]. Science China Technological Sciences,2011,54(6): 1 607-1 614.
[7]	苏怀智,王锋,刘红萍.基于POT模型建立大坝服役性态预警指标[J].水利学报,2012,43(8): 974-978.SU Huaizhi, WANG Feng, LIU Hongping. Early-warning index for dam service behavior based on POT model [J].Journal of Hydraulic Engineering,2012,43(8): 974-978.
[8]	肖磊,万智勇,黄耀英,等.基于最大熵和云模型的RCC坝变形监控指标拟定[J].水利水运工程学报,2018(4): 24-29.XIAO Lei, WAN Zhiyong, HUANG Yaoying, et al. RCC dam deformation monitoring index based on maximum entropy and cloud model [J]. Hydro-Science and Engineering,2018(4): 24-29.
[9]	蔡忍,黄耀英,万智勇,等.基于投影寻踪-云模型法的碾压混凝土坝综合变形监控指标拟定[J].武汉大学学报:工学版,2019,52(3): 194-200.CAI Ren, HUANG Yaoying, WAN Zhiyong, et al. Comprehensive deformation monitoring of RCC dams based on projection pursuit-cloud model method [J]. Engineering Journal of Wuhan University,2019,52(3): 194-200.
[10]	SL252—2017,水利水电工程等级划分及洪水标准[S].SL252-2017,Standard for rank classification and flood projection criteria of water hydropower projects[S].
[11]	谷艳昌,王士军,庞琼,等.基于风险管理的混凝土坝变形预警指标拟定研究[J].水利学报,2017,48(4): 480-487.GU Yanchang, WANG Shijun, PANG Qiong, et al. Study on early warning index of concrete dam's deformation based on the risk management [J]. Journal of Hydraulic Engineering,2017,48(4): 480-487.
[12]	魏德荣,大坝安全监控指标的制定[J].大坝与安全,2003(6): 24-28.WEI Derong. On working out dam safety monitoring index [J]. Large Dam and Safety,2003(6): 24-28.
[13]	沈珠江,左元明.堆石料的流变特性试验研究[C].第6届土力学基础工程学术会议论文集,1991: 443-446.
[14]	周伟,常晓林,胡颖,等.高混凝土面板坝流变分析[J].武汉大学学报:工学版,2005,38(6): 96-99.ZHOU Wei, CHANG Xiaolin, HU Ying, et al. Creep analysis of high concrete face rockfill dam [J]. Engineering Journal of Wuhan University,2005,38(6): 96-99.
[15]	鞠石泉.面板堆石坝坝体变形监控模型研究[D].南京:河海大学,2005.JU Shiquan. Study on the monitoring model of face rock-fill dam's deformation[D].Nanjing: Hohai University,2005.