| 蒋明镜， 朱云刚.重塑黄土与植物根系界面摩擦离散元分析Journal of Water Resources and Water Engineering[J].,2017,28(2):210-215 |
| 重塑黄土与植物根系界面摩擦离散元分析 |
| DEM analysis of the remoulded loess and root system interface friction |
| |
| DOI：10.11705/j.issn.1672-643X.2017.02.36 |
| 中文关键词: 植物根系 重塑黄土 离散单元法 界面摩擦 含水率 |
| 英文关键词: root remoulded loess distinct elememt method surface friction water content |
| 基金项目:国家自然科学基金项目(51579178) |
|
| Hits: 2793 |
| Download times: 1122 |
| 中文摘要: |
| 油松作为一种植根于黄土地区的常见植物，在提高黄土强度方面起重要作用。为了弄清油松根系在黄土地区的固土效应，本文采用离散单元法（Distinct Element Method）模拟根系拉拔试验，分析了法向压力、根系埋深、含水率对根-黄土界面摩擦力学特性的影响。结果表明：拉拔试验中，根-黄土界面峰值强度、残余强度随着法向力的增大而增大；峰值强度、残余强度随着根系埋深的增加而增大；随着含水率的降低，根-黄土界面峰值强度、残余强度呈增大的趋势。 |
| 英文摘要: |
| Pinus plays an important role in the reinforcement of loess strength because of its wide distribution in loess area. In order to investigate the fix-soil-effects of Pinus root system in loess area, a series of pull-out tests were carried out using the Distinct Element Method (DEM). The effects of normal stress, embedded depth and water content on the frictional mechanism of root-soil interface were analyzed. The results showed that, from the pull-out tests, the peak strength and residual strength of root-loess interface increased with the increases of normal stress and embedded depth, and with the decreases of water content. |
|
View Full Text
View/Add Comment Download reader |
| Close |