期刊论文

Experimental Study on Long-time Deformation of Rockfill under Wetting-drying Cycle Effect

中文

防灾减灾工程学报

Journal of Disaster Prevention and Mitigation Engineering

1005-3611

2012

17

4

488-493,501

10.13409/j.cnki.jdpme.2012.04.017

本校为第一机构

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。

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 hug...