| 干湿循环作用对堆石长期变形影响的试验研究 |
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| 引用本文： | 王海俊,殷宗泽.干湿循环作用对堆石长期变形影响的试验研究[J].地震学刊,2012(4):488-493,501. |
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| 作者姓名： | 王海俊 殷宗泽 |
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| 作者单位： | [1]江苏省水利勘测设计研究院,江苏扬州225009 [2]河海大学岩土工程研究所,南京210098 |
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| 摘 要： | 堆石体存在流变,不仅与荷载有关,而且与日晒雨淋引起的干湿循环有关。通过室内试验模拟日晒雨淋引起的干湿循环作用,研究其对堆石体长期变形的影响。试验结果表明,荷载作用流变很快趋于稳定,测得的流变量也相对较小;偏应力状态干湿循环作用引起的长期变形非常明显,其变形占后期变形总量的50%~70%,且后期变形的衰减远小于荷载单独作用引起的流变,这对于坝体的安全和稳定的影响是不容忽视的。根据试验研究揭示的变形规律,本文建立了相应的计算干湿循环变形的数值模型,可用于有限元计算。
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| 关 键 词： | 堆石料 长期变形 土石坝 干湿循环 |
Experimental Study on Long-time Deformation of Rockfill under Wetting-drying Cycle Effect |
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| WANG Hai-jun,YIN Zong-ze.Experimental Study on Long-time Deformation of Rockfill under Wetting-drying Cycle Effect[J].Journal of Seismology,2012(4):488-493,501. |
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| Authors: | WANG Hai-jun YIN Zong-ze |
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| Institution: | 1.Jiangsu Province Water Conservation Survey Design and Research Institute Co.Ltd Yangzhou 225009,China;2.Geotechnical Research Institute of Hohai University,Nanjing 210098,China) |
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| Abstract: | Creep deformation of rockfill has relations with not only load but also wetting-drying cycle,which is caused by solarization and rainfall.Test was taken to simulate the wetting-drying cycle effect caused by solarization and rainfall in laboratory,which is done to study the influence of wetting-drying cycle on rockfill longtime deformation.Test result shows that deformation caused by load function tends to be stable quickly and occupies only a small part in total creep deformation,while the creep deformation caused by wetting-drying cycle is huge and long-time developing with cycles.It takes about 50%～70% in total creep deformation,and has relations with stress.So it has major impact on dam′s stability and safety.According to the analysis of wetting-drying cycle creep principle,numerical model is put forward to calculate the deformation by wettingdrying cycles,and it can be applied in finite element analysis. |
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| Keywords: | rockfill material long-time deformation earth-rock fill dam wetting-drying cycle |
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