PDF Download

[1]LI Chao-an,HU Xie-wen,LI Guan-qi,et al.Formation Mechanism of the ’8·13’ Catastrophic Debris Flow in Sichuan and the Principles of Controlling[J].Research of Soil and Water Conservation,2012,19(02):257-263.

Copy

Formation Mechanism of the ’8·13’ Catastrophic Debris Flow in Sichuan and the Principles of Controlling

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 02 Page number: 257-263 Column: Public date: 2012-04-20

Title:: Formation Mechanism of the ’8·13’ Catastrophic Debris Flow in Sichuan and the Principles of Controlling

Author(s):: LI Chao-an^1,2, HU Xie-wen¹, LI Guan-qi², MA Xian-chun²; 1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong Universty, Chengdu 610031, China;
2. China Railway Southwest Research Institute Co., Ltd., Chengdu 610031, China

Keywords:: debris flow; formation mechanism; controlling; Wenchuan earthquake zone

CLC:: P694

DOI:: -

Abstract:: The heavy rainfall from August 12 to 14th,2010 led to a large area of debris flow in the serious quake-hit of the‘5·12’ Wenchuan earthquake such as Yingxiu Town,Longchi Town and Qingping Township.It caused the serious damage.According to the common characteristics of the three typical debris flows which happened on 13th,August,exploring the formation mechanism of debris flow in earthquake-hit area has great meaning for the controlling and disaster early warning about the debris flow.This paper first introduces the basic condition and the geological environment condition about the typical debris flows in the hardest hit Yingxiu,Longchi,Qingping Township.It also explores the distribution,the formation mechanism and the performance pattern of the debris flow.First,this debris flow is mainly distributed in the vicinity of fault with the zonal distribution.Second,they are the trenches of debris flow before the earthquake.Third,the stability of the slope in the trench is poor.And on the effect of the‘5·12’ Wenchuan earthquake,the conditions got worse,there are more things going into the trench,which form large or small blockage.During the rainfall,the surface runoff forms the pattern of debris flow which can ditch block storage and burst of energy dissipation.When the blocking body bursts,the water runs with the sand,the pumping groove and they enhance the formation of large,sudden landslides.According to the characteristics and the mechanisms of debris flow,this paper concludes the controlling principles of earthquake debris flow.First,the comprehensive measures of controlling the gully and slope should be combined.Second,project implementation and their functions maintenance should be combined.Third,the disaster controlling of projects and the construction should be combined.We can also say that we should combine the controlling of the debris flow with the project of the slope controlling and the road reinforcement about the groove side.Fourth,the debris flow monitoring and warning should also be arranged in the potential of the plug body on the downstream side.

References:: [1] 李朝安,谭炳炎,胡卸文.汶川5·12地震公路灾害分析和防治对策[J].自然灾害学报,2009,18(6):97-104.
[2] 许强.四川省8·13特大泥石流灾害特点、成因与启示[J].工程地质学报,2010,18(5):610-621.
[3] 唐川,李为乐,丁军,等.汶川震区映秀镇“8·14”特大泥石流灾害调查[J].地球科学:中国地质大学学报,2011,36(1):172-180.
[4] 苏鹏程,韦方强,冯汉中,等.“8·13”四川清平群发性泥石流灾害成因及其影响[J].山地学报,2011,29(3):337-347.
[5] 余斌,马煜,吴雨夫.汶川地震后四川省绵竹市清平乡文家沟泥石流灾害调查研究[J].工程地质学报,2010,18(6):827-836.
[6] 张自光,张志明,张顺斌.都江堰市八一沟泥石流形成条件与动力学特征分析[J].中国地质灾害与防治学报,2010,21(1):34-38.
[7] 马煜,余斌,吴雨夫等.四川都江堰龙池“8·13”八一沟大型泥石流灾害研究[J],四川大学学报,2011,43(增刊1):92-98.
[8] 沈军辉,朱容辰,刘维国,等.“5·12”汶川地震诱发都江堰龙池镇干沟泥石流可能性地质分析[J].山地学报,2008,26(5):513-517.
[9] 李朝安,胡卸文,王良玮.山区铁路沿线泥石流泥位自动监测预警系统[J].自然灾害学报,2011,20(5):74-81.
[10] 李朝安,魏鸿.西南地区泥石流灾害及防灾预警[J].中国地质灾害与防治学报,2004,15(3):34-37.

Similar References:

Memo

Last Update: 1900-01-01