Study on Mesomechanical Simulation of Piping with Model Tests and PFC2D
详细信息
- 责任者：Zhang Gang (Shanghai Xiandai Architectural Design Group ; Shenyuan Geotechnical Engineering Co. ; Ltd. ; Shanghai 2100011 ; China) ; Zhou Jian
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2007
- 卷期：34(6)
- 关键词：管涌 ; piping
- 页码：p.83-86
- 图表：5 illus., 2 tables, 5 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
Vertical piping of a dam is simulated by means of model tests and PFC2D software. Piping is observed and recorded from the perspective of mesomechanism using advanced digital photography tracking equipment during the model test. Change in some parameters, such as void ratio and diameter of running out particles, are summarized. The model test offered PFC2D mesomechanical parameters and macroseopical reference. Formula describing void ratio transform from three dimension to two dimension are deduced, which combines the PFC2D simulation of void ratio with the model test. A solid-liquid coupling analyzing model is introduced for the numerical analysis of piping. Occurrence and development mesomechanism of piping is deduced, and changes in soil sample and fluid velocity are analyzed. The results provide a practical basis for the further application of PFC2D in the field of seepage and seepage erosion, and also provide a new way to explain and analyze the piping phenomenon from the perspective of mesomechanism.