【摘要】 观言组沟位于5.12大地震灾区四川省宝兴县,是一条老泥石流沟,并正处于成熟期。在大地震前,观言组沟就爆发过泥石流并对沟口的居民及道路造成了很大影响。震后,观言组沟沟道内新产生了大量松散物源,通过实地调查,物源总量不仅对沟口造成巨大威胁,而且极易将灵关河堵塞。通过研究得出,观言组沟泥石流是一条暴雨谷沟型泥石流,而宝兴县降雨主要集中于6月—9月,极易通过集中降雨启动物源。因此,通过对沟内物源启动和拦挡采取工程是非常重要。更多还原

【Abstract】 The Guanyanzu gully situates at the Baoxing county of Sichuan province,which is the heavy disaster area of the 5.12 Earthquake.The Guanyanzu debris flow gully is an old debris flow gully,and is at the peak of its formation.Before the 5.12 Earthquake,this gully had been broken with debris flows,which wrought severe damages on neighboring residents and passageways in gully head.After the 5.12 Earthquake,a great of loose materials have been created along the channel of Guanyanzu gully.Through the field surveys,the total amount of materials made not only a huge threat to the gully head,but also a block to Lingguan River.According to the analysis,this thesis gets the conclusions as follows: the Guanyanzu debris flow gully is a rainstorm-triggered debris flow.However,the major downpour in Boxing county occurs from June to September.It is very easy to format the material by concentrated rainfall.So it is very important to make engineering in terms of the start and prevent to the gully inside materials.更多还原