G318川藏公路段泥石流危险性评价
文献类型：期刊论文
| 作者 | 崔鹏
|
| 刊名 | 山地学报
 |
| 出版日期 | 2013 |
| 卷号 | 31期号:3页码:342-348 |
| 关键词 | 川藏公路 泥石流 危险性 信息量法 |
| 其他题名 | Hazard Assessment of Debris Flows along G318 Sichuan － Tibet Highway |
| 通讯作者 | 崔鹏 |
| 中文摘要 | 以野外调查为基础,选取坡度、地表起伏度、岩石抗剪强度指标(内摩擦角与粘聚力)、距断裂距离、地震烈度、岩体风化程度、最大24 h降雨量、年平均气温、土地利用类型等10项指标作为基本判别因子,分析泥石流对影响因子的敏感程度。研究表明,G318川藏公路最有利于泥石流发育的条件为:1.坡度:20°～35°;2.地表起伏度:100～300 m;3.岩石抗剪强度指标:内摩擦角<35°,粘聚力<25 MPa;4.岩体风化程度:>0.4;5.距断层距离:0～10km;6.地震烈度:大于Ⅶ度;7.土地利用:荒漠草原、冰川、裸岩砾石、坡草地;8.年平均气温:<8°与10°～12°;9.最大24 h降雨量:>40 mm。结合GIS与信息量模型分析G318川藏公路段沿线泥石流危险性,研究结果表明:公路大部分路段处于中度、高度与极高度危险区,三者面积之和占总面积的71.99%,范围较大,主要分布在大渡河、金沙江、澜沧江、怒江、帕隆藏布江等大江大河的深切峡谷区;基本无危险区范围较小,主要位于成都平原和高原面路段,仅占总面积的4.21%。研究成果与实际灾情吻合,可为川藏公路泥石流风险评估及新路选线提供科学依据。 |
| 英文摘要 | This article analyzes the susceptibility of debris flows along G318 Sichuan － Tibet highway，and the results show the favorable geological and geomorphological conditions for debris flow occurrence，which includes: 1．hill slopes from 20° to 35°，2． relative elevation between 100 m and 300 m，3． for rocks’shear strength indexes，angle of internal friction is lower than 35°and cohesive force is below 25 MPa，4． weathering degree of rock stratum should be above 0．4，5． the distances to faults within 10 km，6 ． the earthquake magnitude is above 7．0，7． land use types including desert steppe，glacier area，bare rock land，and slope grassland，8 ． annual mean temperature is located below 8° and between 10° and 12°，9 ． maximum daily rainfall is larger than 40 mm． Through adopting information acquisition analysis method for the above selected factors， the hazard degree of debris flow was evaluated，and debris-flow hard mapping of Sichuan － Tibet highway was completed with support of GIS technique． The proposed method divides the hazard degree along the highway into 5 levels: very low， low，medium，high and very high． The high hazardous areas along G318 Sichuan － Tibet highway are mainly located in the medium，high，very high levels，which account for 71． 99% of the whole highway area． They are located in the canyon area of Dadu Ｒiver， Jinsha Ｒiver，Lanchang Ｒiver，Nu Ｒiver and Palongzangbu Ｒiver． Ｒeferring to these areas， the debris-flow prevention project should be strengthened in road construction and land designing． While the very low hazardous areas are relatively small，accounting for only 4．21%，which are located in the sections of Chengdu plain area and Tibetan plateau area． The analyzed results above are consistent with results from the actual debris flows situation along Sichuan － Tibet highway． Thus， this hazard evaluation results are suitable for providing debris flow risk analysis and line selection for new road． |
| 分类号 | P642.23 |
| 收录类别 | CSCD |
| 资助信息 | 国家自然科学基金重点基金项目(41030742);国家基础研究重点计划(973)项目(2011CB409902);中国科学院“西部之光”人才培养计划项目(Y3R2440440) |
| CSCD记录号 | CSCD:4874605 |
| 公开日期 | 2013-08-30 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6251]  |
| 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 | 崔鹏. G318川藏公路段泥石流危险性评价[J]. 山地学报,2013,31(3):342-348. |
| APA | 崔鹏.(2013).G318川藏公路段泥石流危险性评价.山地学报,31(3),342-348. |
| MLA | 崔鹏."G318川藏公路段泥石流危险性评价".山地学报 31.3(2013):342-348. |
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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