Impacts of Weathering on Formation of Gullied Debris Flow

YU Bin; CHU Sheng-ming; ZHU Yuan; XIE Hong

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Impacts of Weathering on Formation of Gullied Debris Flow

- Impacts of Weathering on Formation of Gullied Debris Flow
- Bulletin of Soiland Water Conservation Vol. 32, Issue 6, Pages: 51-56(2013)
- 作者机构：
  
  1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川,成都,610059
  2. 四川省川建勘察设计院,四川,成都,610017
  3. 中国科学院成都山地灾害与环境研究所,四川,成都,610041
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013
- 稿件说明：
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YU Bin, CHU Sheng-ming, ZHU Yuan, et al. Impacts of Weathering on Formation of Gullied Debris Flow[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 51-56.
DOI：

YU Bin, CHU Sheng-ming, ZHU Yuan, et al. Impacts of Weathering on Formation of Gullied Debris Flow[J]. Bulletin of Soiland Water Conservation, 2013, 32(6): 51-56. DOI：

摘要

地质条件是泥石流发育环境的三大条件之一

其主要作用是为泥石流提供固体物源。风化作用对产生泥石流固体物源的影响很大。以岩石的坚固系数为基础

研究了物理及化学风化对形成泥石流固体物源的影响。研究结果表明:(1)物理风化是形成泥石流物源的主要原因

冰劈作用往往造成强烈的物理风化

有利于泥石流的发育(2)化学风化不直接提供固体物源

但碳酸根离子的存在使化学风化不利于泥石流的发育。研究得出岩石坚固系数的物理风化和化学风化修正方法

最终得到形成泥石流的地质因子。形成泥石流的地质因子在汶川地震影响区内判别泥石流的暴发与否的应用研究中取得了较好的结果。

Abstract

Ueological condition

one of three debris forming factors

mainly provides the solid source for debris flow

and weathering plays very important role in the formation of solid source.The article analyzed the influence of physical and chemical weathering on the formation of solid source based on the rock firmness coefficient and concluded that:(1)The physical weathering

often caused by frost wedging in favor of the formation of debris flow

is the main reason for the development of the solid source of debris flow;(2)The chemical weathering does not provide the solid source directly while the carbanion is not in favor of the formation of debris flow.Based on the modification of the rock firmness coefficients by physical and chemical weathering

the geological factor forming debris flow is obtained

which was tested with good result in the judgment of debris flow outbreak in Wenchuan Earthquake area.

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