Email Alerts
RSS
Monitoring and analysis on micro-amplitude deformations of a concrete face rock-fill dam with long-term service conditions
-
摘要: 受堆石料自身流变特性及外部因素影响，混凝土面板堆石坝在服役后较长一段时间内仍有持续的微幅变形增长，微幅变形的不断累积可对面板等防渗结构产生不利影响。针对传统监测手段精度低、频次少、测量结果难以反映大坝真实的后期变形特征这一缺陷，尝试将静力水准系统与引张线系统应用到面板堆石坝表面沉降与水平位移监测中。利用上述系统，对泽雅水库大坝开展持续5年的坝体表面变形监测。分析监测数据发现：（1）上述监测系统的精度与稳定性可满足堆石坝长效服役状态下微幅变形的观测需求。（2）泽雅水库大坝在运行近20年后，堆石体的流变仍未停止，近5年最大平均变形速率可达4.33 mm/a（沉降）和3.50 mm/a（水平位移）。（3）各测点位移发展速率总体上逐年降低，变形趋于稳定。研究结果可为同类型工程监测设计及堆石料流变研究提供参考。Abstract: The micro-amplitude deformations of concrete face rockfill dams (CFRDs) can last for a very long time due to creep effect and external influences. The seepage control system such as the concrete face can be damaged if these micro-amplitude deformations continue to grow. Traditional deformation measuring methods are suffering from low accuracy and low frequency, thus the data can hardly reflect the true deformation features of CFRDs. To improve this defect, the Hydrostatic Level System and the Tension Wire Alignment System are applied for measuring the vertical and horizontal surface deformations for Zeya Reservoir dam. After a 5-year continuous monitoring, the monitoring data reveals that: ①The above measuring system can meet the requirements of the long-term and micro-amplitude deformation monitoring. ②The deformaions due to material creep have not stopped even after 20 years, the max average vertial deformation and horizontal deformaion rate can reach 4.33 mm/a and 3.50 mm/a, respectively. ③The deformation rates are reducing gradually, thus the deformations tend to converge. The above findings can provide useful references for monitoring system design and creep behavior studying.
-
图 1 静力水准系统与静力水准仪结构示意
Figure 1. Schematic graph of Hydrostatic Level System and Hydrostatic Level Sensor
图 2 静力水准仪系统测量原理示意
Figure 2. Schematic graph of Hydrostatic Level System working principle
图 5 逐日位移增量概率密度分布
Figure 5. Probability density distribution of daily deformation increments
图 7 左0+003.0 m断面各测点实测沉降过程
Figure 7. Graph of vertical deformations in section “Left 0+003.0 m”
图 8 典型时刻各测点水平位移分布
Figure 8. Distribution of horizontal deformation at a typical moment
-
[1] 吴中如, 徐波, 顾冲时, 等. 大坝服役状态的综合评判方法[J]. 中国科学:技术科学,2012,55(8):2300-2312. (WU Zhongru, XU Bo, GU Chongshi, et al. Comprehensive evaluation methods for dam service status[J]. Science China Technological Sciences, 2012, 55(8): 2300-2312. (in Chinese) doi: 10.1007/s11431-012-4907-5 WU Zhongru, XU Bo, GU Chongshi, et al. Comprehensive evaluation methods for dam service status[J]. Science China Technological Sciences, 2012, 55(8): 2300-2312. (in Chinese)) doi: 10.1007/s11431-012-4907-5 [2] 冯龙海, 王士军, 谷艳昌, 等. PFMA在混凝土面板堆石坝安全监测优化布置中的应用[J]. 水利水运工程学报,2021(2):124-129. ((FENG Longhai, WANG Shijun, GU Yanchang, et al. Application of PFMA in safety monitoring of concrete face rockfill dams[J]. Hydro-Science and Engineering, 2021(2): 124-129. (in Chinese) doi: 10.12170/20201120001 FENG Longhai, WANG Shijun, GU Yanchang, et al. Application of PFMA in safety monitoring of concrete face rockfill dams [J]. Hydro-Science and Engineering, 2021(2): 124-129. (in Chinese) doi: 10.12170/20201120001 [3] 卢正超, 杨宁, 韦耀国, 等. 水工程安全监测智能化面临的挑战、目标与实现路径[J]. 水利水运工程学报,2021(6):103-110. (LU Zhengchao, YANG Ning, WEI Yaoguo, et al. Intelligent water engineering safety monitoring: challenges, goals and roadmap[J]. Hydro-Science and Engineering, 2021(6): 103-110. (in Chinese) doi: 10.12170/20201210003 LU Zhengchao, YANG Ning, WEI Yaoguo, et al. Intelligent water engineering safety monitoring: challenges, goals and roadmap[J]. Hydro-Science and Engineering, 2021(6): 103-110. (in Chinese)) doi: 10.12170/20201210003 [4] 郦能惠. 高混凝土面板堆石坝新技术[M]. 北京: 中国水利水电出版社, 2007. LI Nenghui. Recent technology for high concrete face rockfill dams[M]. Beijing: China Water & Power Press, 2007. （in Chinese） [5] 梁军. 高面板堆石坝流变特性研究[D]. 南京: 河海大学, 2003. LIANG Jun. Research on rheology properties of high concrete-faced rock-fill dams[D]. Nanjing: Hohai University, 2003. （in Chinese） [6] 张丙印, 师瑞锋. 流变变形对高面板堆石坝面板脱空的影响分析[J]. 岩土力学,2004,25(8):1179-1184. (ZHANG Bingyin, SHI Ruifeng. Influence of creeping on separation between concrete slab and cushion layer in high concrete face rock-fill dam[J]. Rock and Soil Mechanics, 2004, 25(8): 1179-1184. (in Chinese) doi: 10.3969/j.issn.1000-7598.2004.08.001 ZHANG Bingyin, SHI Ruifeng. Influence of creeping on separation between concrete slab and cushion layer in high concrete face rock-fill dam[J]. Rock and Soil Mechanics, 2004, 25(8): 1179-1184. (in Chinese)) doi: 10.3969/j.issn.1000-7598.2004.08.001 [7] 沈珠江, 赵魁芝. 堆石坝流变变形的反馈分析[J]. 水利学报,1998,29(6):1-6. (SHEN Zhujiang, ZHAO Kuizhi. Back analysis of creep deformation of rockfill dams[J]. Journal of Hydraulic Engineering, 1998, 29(6): 1-6. (in Chinese) doi: 10.3321/j.issn:0559-9350.1998.06.001 SHEN Zhujiang, ZHAO Kuizhi. Back analysis of creep deformation of rockfill dams[J]. Journal of Hydraulic Engineering, 1998, 29(6): 1-6. (in Chinese)) doi: 10.3321/j.issn:0559-9350.1998.06.001 [8] 李广信. 堆石料的湿化试验和数学模型[J]. 岩土工程学报,1990,12(5):58-64. (LI Guangxin. Rockfill materials’ wetting test and mathematical model[J]. Chinese Journal of Geotechnical Engineering, 1990, 12(5): 58-64. (in Chinese) doi: 10.3321/j.issn:1000-4548.1990.05.007 LI Guangxin. Rockfill materials' wetting test and mathematical model[J]. Chinese Journal of Geotechnical Engineering, 1990, 12(5): 58-64. (in Chinese)) doi: 10.3321/j.issn:1000-4548.1990.05.007 [9] 程展林, 丁红顺. 堆石料蠕变特性试验研究[J]. 岩土工程学报,2004,26(4):473-476. (CHENG Zhanlin, DING Hongshun. Creep test for rockfill[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(4): 473-476. (in Chinese) doi: 10.3321/j.issn:1000-4548.2004.04.009 CHENG Zhanlin, DING Hongshun. Creep test for rockfill[J]. Chinese Journal of Geotechnical Engineering, 2004, 26(4): 473-476. (in Chinese)) doi: 10.3321/j.issn:1000-4548.2004.04.009 [10] 李国英, 米占宽, 傅华, 等. 混凝土面板堆石坝堆石料流变特性试验研究[J]. 岩土力学,2004,25(11):1712-1716. (LI Guoying, MI Zhankuan, FU Hua, et al. Experimental studies on rheological behaviors for rockfills in concrete faced rockfill dam[J]. Rock and Soil Mechanics, 2004, 25(11): 1712-1716. (in Chinese) doi: 10.3969/j.issn.1000-7598.2004.11.007 LI Guoying, MI Zhankuan, FU Hua, et al. Experimental studies on rheological behaviors for rockfills in concrete faced rockfill dam[J]. Rock and Soil Mechanics, 2004, 25(11): 1712-1716. (in Chinese)) doi: 10.3969/j.issn.1000-7598.2004.11.007 [11] 周墨臻, 张丙印, 钱晓翔, 等. 堆石料流变应变的硬化特性试验研究[J]. 岩土工程学报,2020,42(4):688-695. (ZHOU Mozhen, ZHANG Bingyin, QIAN Xiaoxiang, et al. Experimental study on hardening effect of creep in rockfill material[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(4): 688-695. (in Chinese) ZHOU Mozhen, ZHANG Bingyin, QIAN Xiaoxiang, et al. Experimental study on hardening effect of creep in rockfill material[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(4): 688-695. (in Chinese)) [12] 沈珠江. 土石料的流变模型及其应用[J]. 水利水运科学研究,1994(4):335-342. (SHEN Zhujiang. A creep model of rock-fill material and determination of its parameters by back analysis[J]. Journal of Nanjing Hydraulic Research Institute, 1994(4): 335-342. (in Chinese) SHEN Zhujiang. A creep model of rock-fill material and determination of its parameters by back analysis[J]. Journal of Nanjing Hydraulic Research Institute, 1994(4): 335-342. (in Chinese)) [13] 沈珠江. 鲁布革心墙堆石坝变形的反馈分析[J]. 岩土工程学报,1994,16(3):1-13. (SHEN Zhujiang. Back analysis of deformation of Lubuge earth core rockfill dam[J]. Chinese Journal of Geotechnical Engineering, 1994, 16(3): 1-13. (in Chinese) doi: 10.3321/j.issn:1000-4548.1994.03.001 SHEN Zhujiang. Back analysis of deformation of Lubuge earth core rockfill dam[J]. Chinese Journal of Geotechnical Engineering, 1994, 16(3): 1-13. (in Chinese)) doi: 10.3321/j.issn:1000-4548.1994.03.001 [14] 熊国文. 泽雅水库面板堆石坝十年运行期(1999—2008)观测资料分析[R]. 南京: 南京水利科学研究院, 2009. XIONG Guowen. Ten-year (1999-2008) monitoring data analysis for Zeya Reservoir CFRD[R]. Nanjing: Nanjing Hydraulic Research Institute, 2009. （in Chinese） -
下载:
点击查看大图
图(9)
计量
- 文章访问数: 164
- HTML全文浏览量: 108
- PDF下载量: 22
- 被引次数: 0
