WEI Cheng-wu,WU Xi-yong.The Debris Flow Movement Characteristics and Their Influences on Engineering Projects in the Lamaxi Channel[J].Research of Soil and Water Conservation,2008,15(06):170-172.
喇嘛溪沟泥石流运动特征及其对工程影响分析
- Title:
- The Debris Flow Movement Characteristics and Their Influences on Engineering Projects in the Lamaxi Channel
- Keywords:
- debris flow; development characteristic; flow velocity
- 分类号:
- P642.23
- 摘要:
- 喇嘛溪沟是流沙河的一条支流，历史上曾发生过不同规模的泥石流。沟内第四系松散堆积物丰富，在特大暴雨的诱发下，有暴发泥石流的可能。为确保桥梁的安全运营，在现场调查的基础上，根据国内外的研究成果，结合喇嘛溪沟流域的特征，分析研究了喇嘛溪沟沟谷发育特征和泥石流的运动特性。通过对不同设计概率下的泥石流流速、峰值流量、一次泥石流固体物质总量的计算，桥梁工程设施按100a使用寿命考虑，喇嘛溪沟流域内的松散物源在遭遇100a一遇特大暴雨的情况下有失稳启动的可能，并对桥梁安全运营有一定的影响，这一研究对保证桥梁工程的安全有着重要的现实意义。
- Abstract:
- The Lamaxi channel is a tributary of the Liusha stream.The different scale debris flows ever occured along these gullies in history.The gullies are affluent in the Quaternary sediments.The debris flow induced by heavy rainstorms is still possible.To ensure the safety of the bridge operation,based on the investigation at the scene,according to the study of the home and abroad,the authors analyzed the formation and the dynamic characteristics of the debris flow with the characteristics of the Lamaxi channel drainage area.Through calculating the probability of different design of the debris flow velocity,peak flow,a one-time total volume of solid matter of the debris flow,the bridge project facilities are considered by the service life of 100 years.The loose source of the Lamaxi channel drainage area may start instability in the event of a return period of 100 years of heavy rainfall circumstances.This has a certain influence to the safety of the bridge operation.This study to guarantee the safety of the bridge has an important practical significance.
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备注/Memo
收稿日期:2008-3-5;
基金项目:四川省交通厅科技项目
作者简介:魏成武（1983- ），男，陕西榆林市人，硕士研究生，主要从事地质灾害与防治工程研究。E-mail：weichengwu@yahoo.cn