为深入了解挤压边墙对面板堆石坝结构性态的影响, 以某工程面板堆石坝为对象, 建立典型断面的平面模型, 其中该模型包括非简化的挤压边墙和简化的等效厚度的挤压边墙2个模型。通过非线性有限元计算方法, 对比分析了原始施工方法和挤压边墙施工方法的大坝应力变形状态;分析挤压边墙取等效厚度的计算是否合理;研究挤压边墙对整体面板和堆石体的应力和变形的影响。通过分析得出, 挤压边墙对堆石体影响不大, 而且有效地减小了面板在竣工期和蓄水期的挠度变形和应力, 使工程更加安全经济。研究成果为挤压边墙施工的推广提供参考。
Abstract
Extrusion side wall as a construction technique used in the upstream slope of rock-fill dam with concrete panel has been widely used in many projects. To understand the static and dynamic effect of extruded side wall acting on the rock-fill dam with concrete panel, 2-D models of typical section of a concrete-faced rockfill dam are built, which contain the real extruded side wall and the extruded side wall with an equivalent thickness. The stress state and deformation state using the original construction method and the extruded side wall technique are compared and analyzed by non-linear finite element calculation. The rationality of extruded side wall’s approximate treatment with an equivalent thickness is verified. Moreover, the effect of extruded side wall on the stress and deformation of panel and rock-fill body is researched. It’s concluded that extruded side wall reduces the deflection deformation and stress of panel during construction finishing period and impounding period, but has no apparent impact on rock-fill body. It makes the project safer and more economical, and is worth popularization.
关键词
挤压边墙 /
面板堆石坝 /
有限元单元法 /
应力变形
Key words
extruded side wall /
concrete-faced rock-fill dam /
FEM /
stress and deformation
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参考文献
[1] 颉建军. 面板堆石坝垫层施工及坡面防护技术的发展[J]. 水力发电, 2003, 29(4):44-46. (XIE Jian-jun. Development of Cushion Construction and Slope Protection Technology for Concrete Faced Rock Dam Construction[J]. Water Power, 2003, 29(4):44-46.(in Chinese))
[2] 潘文学, 孙淑侠. 挤压式混凝土边墙固坡施工法在黄河公伯峡水利工程中的应用[J]. 水利与建筑工程学报, 2005, 3(2):44-47, 51. (PAN Wen-xue, SUN Shu-xia. Application of Construction Technique for Slope Protection of Crushed Concrete Side Wall in Gongboxia Hydro Project of Yellow River[J]. Water Resources and Architectural Engineering, 2005, 3(2):44-47, 51.(in Chinese))
[3] 吕玉峰, 周庆瑜. 挤压边墙施工方法对面板受力的影响[J].东北水利水电, 2007, 25(6):8-10. (LV Yu-feng, ZHOU Qing-yu. Discussion on Influence of Construction Method of Crushing Side Wall to Face Slab Stressing[J]. Water Resources and Hydropower of Northeast, 2007, 25(6): 8-10. (in Chinese))
[4] 马 明, 沈振中, 吕生玺. 九甸峡混凝土面板堆石坝挤压边墙施工有限元仿真分析[J]. 水利水电技术, 2008, 39(9):59-62, 70. (MA Ming, SHEN Zhen-zhong, LV Sheng-xi. FEM Emulation Analysis on Construction of Extruded Sidewall for Jiudianxia Concrete Face Rock Fill Dam[J]. Water Resources and Hydropower Engineering, 2008, 39(9): 59-62, 70. (in Chinese))
[5] 童富果, 田 斌, 孙大伟. 挤压边墙对高面板坝应力-变形影响分析[C]∥中国水力发电工程学会水文泥沙专业委员会2007年学术年会暨高面板技术研讨会论文专辑, 2007: 128-133. (TONG Fu-guo, TIAN Bin, SUN Da-wei. Effect of Extruded Side Wall on the Stress and Deformation of High Concrete Faced Rock Fill Dam[C]∥Proceedings of Concrete-faced High Dam Technology Seminar of Hydropower Engineering Society and Professional Committee of Hydrology and Sediment, 2007: 128-133. (in Chinese))
[6] 梁存绍, 胡泉光, 周俊方. 挤压边墙施工技术在水布垭工程中的应用[J]. 水力发电, 2007, 33(8):58-60, 76. (LIANG Cun-shao, HU Quan-guang, ZHOU Jun-fang. Application of Extruded Sidewall Technique to the Shuibuya Project[J]. Water Power, 2007, 33(8):58-60, 76. (in Chinese))
[7] 肖化文. 邓肯-张E-B模型参数对高面板坝应力变形的影响[J]. 长江科学院院报, 2004, 21(6):41-44. (XIAO Hua-wen. Effect of Duncan-Chang E-B Model Parameters on Stress and Deformation of High CFRD Dam[J]. Journal of Yangtze River Scientific Research Institute, 2004, 21(6):41-44. (in Chinese))
[8] 殷宗泽. 土工原理[M].北京:中国水利水电出版社, 2007.(YIN Zong-ze. Theory of Soil Engineering[M]. Beijing: China Water Power Press, 2007. (in Chinese))
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