泥石流源区崩滑土体粒度特征及其产沙特性
文献类型：期刊论文
| 作者 | 王道杰 ; 张淑娟
|
| 刊名 | 山地学报
 |
| 出版日期 | 2014 |
| 卷号 | 32期号:1页码:66-73 |
| 关键词 | 泥石流源区 崩滑土体 粒度分布 产沙特性 |
| 其他题名 | The Research of Grain Composition and Sediment Generation on Landslip-collapse Soil in Debris Flow Original Area |
| 通讯作者 | 王道杰 |
| 合作状况 | 国内 |
| 中文摘要 | 泥石流形成与崩滑土体的存在密切相关，大量崩滑土体堆积在泥石流源区，为泥石流形成提供了丰富的固体物质。通过对云南东川蒋家沟泥石流源区崩滑土体的粒度特征分析，探讨了源区崩滑土体粒度特征与泥石流颗粒组成的关系。结果表明，源区崩滑土体和泥石流机械组成相似，粒度分布主要为单峰分布，说明泥石流粒度组成继承了源区崩滑土体的性质。同时对源区崩滑土样进行室内小型水槽冲刷实验，研究其产沙特性，分析表明: 一定流量的径流冲刷作用下，崩滑土体的产沙过程满足关系式y = a+bt－1+ ct－2 ，土体的抗冲系数k 与大于2 mm 的砾石含量和小于0.005 mm 的黏粒含量相关，呈现出分别随着二者含量的增加而先增大后减小的变化趋势。 |
| 英文摘要 | Large numbers of landslides and collapses happened frequently in the debris flow original area，and supplied sufficient materials for debris flow． Based on landslip-collapse soil samples from debris flow original area in Jiangjia Gully，of Yunnan，China analysis of grain composition was performed to discuss the relationship of grain composition between landslip-collapse soils and debris flows． According to the experimental data， it was found that both of them can be characterized by a wide-ranged distribution of grain size，and characteristics of particle composition have similar distribution form，meanwhile the grain size distribution curves are single peak，by analyzing the gradation curve． Moreover，a series of small flume experiments were carried out，which was used to investigate the sediment yield mechanism of landslip-collapse soil in the source．Research results revealed the relationship between sediment yield and scouring time can be expressed as: y = a +bt－1 + ct－2，which indicated that the sediment yield decrease by the second power function with the increment of scouring time． Anti-scouring coefficient of landslip-collapse soils，which was proposed to describe soil anti-scour ability， increases with increment of coarse-grained( ＞ 2mm) contents and clay( ＜ 0．005 mm) contents， rising to the maximum at contents equal 63%，1．5%， respectively，decreasing exceeded 63%，1 ．5%， respectively． |
| 分类号 | P642.1;S157.1 |
| 收录类别 | CSCD |
| 资助信息 | 国家科技支撑计划课题( 2012BAC06B02 );中国科学院山地灾害与地表过程重点实验室重点科研项目( Y3K2040040) |
| 语种 | 中文 |
| CSCD记录号 | CSCD:5135240 |
| 公开日期 | 2014-05-20 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6938]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 推荐引用方式 GB/T 7714 | 王道杰,张淑娟. 泥石流源区崩滑土体粒度特征及其产沙特性[J]. 山地学报,2014,32(1):66-73. |
| APA | 王道杰,&张淑娟.(2014).泥石流源区崩滑土体粒度特征及其产沙特性.山地学报,32(1),66-73. |
| MLA | 王道杰,et al."泥石流源区崩滑土体粒度特征及其产沙特性".山地学报 32.1(2014):66-73. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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