| 张延亿,邓刚,张茵琪,王俊鹏,陈辉,王晓慧.土石混合料固结湿化变形试验研究[J].水利学报,2020,51(11):1393-1400 |
| 土石混合料固结湿化变形试验研究 |
| Experimental study on the characteristics of consolidate-wetting deformation of soil-aggregate mixture materials |
| 投稿时间：2020-04-17 |
| DOI：10.13243/j.cnki.slxb.20200248 |
| 中文关键词: 土石混合料 宽级配 固结湿化试验 湿化模型 |
| 英文关键词: soil-aggregate mixture wide grading consolidate-wetting test wetting model |
| 基金项目:国家重点研发计划项目（2018YFC1508502）；国家重点研发计划项目（2017YFC0404803）；中国水利水电科学研究院基本科研业务费项目（GE0145B562017，GE0145B102010） |
|
| 摘要点击次数: 575 |
| 全文下载次数: 336 |
| 中文摘要: |
| 堰塞坝料大多为土石混合料且级配分布范围较宽，其湿化变形影响坝体的长期稳定安全。选择典型的具有宽级配特征的三组试验材料，采用大型固结仪开展固结湿化试验。根据试验结果，分析了竖向应力对湿化应变的影响规律，发现湿化应变随竖向应力的增大呈对数趋势增大，且在高应力范围内应力增大时湿化变形增量更为显著；探讨了材料级配特征对湿化变形的影响，对于级配特征值均较小且细颗粒含量较高的材料，湿化变形更为显著；基于湿化变形试验时程规律，建立了四参数双曲线型的固结湿化变形模型，模拟结果较为准确，能较好地反映宽级配粗粒料固结湿化变形特征。 |
| 英文摘要: |
| The materials for barrier dams are mainly composed of soil-aggregate mixture materials whose grading varies within a wide range, and the wetting deformation is an important factor for the long-term safe stability of the dam. For three typical materials with the wide grading, a consolidate-wetting test was performed by large-scale consolidation apparatus. According to the test results,the influence of the vertical stress on the wetting strain was analyzed, and the wetting strain increased logarithmically with the vertical stress,and this increase was even more remarkable for high vertical stress. The effect of the grading characteristics on the wetting deformation was discussed. For materials with small grading characteristic values and high content of fine particle, the deformation was more significant. Based on the time-history curve of the wetting deformation, a four-parameter hyperbolic wetting model was established, which was well verified and well reflect the characteristics of consolidate-wetting of soil-aggregate mixture materials with wide grading. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|