[1]周海波,陈宁生,卢阳,等.泥石流沟谷坊坝群治理效应——以地震极重灾区北川县化石板沟为例[J].山地学报,2012,(03):347.
　ZHOU Haibo,CHEN Ningsheng,LU Yang,et al.Control Effectiveness of Check Dams in Debris Flow Gully——A Case of Huashiban Gully in Earthquake Worststricken Area，Beichuan County[J].Mountain Research,2012,(03):347.
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泥石流沟谷坊坝群治理效应——以地震极重灾区北川县化石板沟为例()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年03期
页码:
347
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
Control Effectiveness of Check Dams in Debris Flow Gully——A Case of Huashiban Gully in Earthquake Worststricken Area，Beichuan County
作者:
周海波;陈宁生;卢阳;李兵;
1.中国科学院水利部成都山地灾害与环境研究所，中国科学院山地灾害与地表过程重点实验室，四川 成都 610041；
2.中国科学院研究生院，北京 100049；
3.四川省交通厅公路规划勘察设计研究院，四川 成都 610041
Author(s):
ZHOU Haibo; CHEN Ningsheng; LU Yang; LI Bing
1. Institute of Mountain Hazards and Environment，Chinese Academy of Sciences; Key Lab. of Mountain Hazards and Surface Process， CAS，Chengdu 610041，China；
2. Graduate School of Chinese Academy of Sciences，Beijing 100049，China;
3. Sichuan Province Transport Department Highway Planning，Survey，Design and Research Institute，Chengdu 610041，China
关键词:
泥石流; 谷坊坝群; 防治效益
Keywords:
debris flows; check dams; control effectiveness
分类号:
642.23
文献标志码:
A
摘要:
谷坊坝是泥石流治理的重要工程措施之一。化石板沟泥石流治理工程共设13座谷坊坝,组成梯级谷坊坝群;坝体主要分布在泥石流形成区和流通区,混凝土结构,轴向两端嵌入沟道两侧基岩0.5～1 m。通过对比化石板沟谷坊工程修建前后沟床纵坡比降、沟道两侧斜坡稳定性及泥石流侵蚀速率等方面的差异,证明谷坊工程能够有效拦蓄松散固体物质、稳固沟床和岸坡、降低沟道纵坡比降、降低泥石流流速和耗散流体能量、抬高沟道上游泥石流侵蚀基准面。研究发现,化石板沟谷坊坝群共拦截固体物质2.76×104 m3,仅占流域物源总量574.9×104 m3的0.5%,占近期可供给泥石流活动的物源量85×104 m3的3.3%;稳固沟床松散物...
Abstract:
Check dam is one of the most effective structures to control debris flows. In Huashiban gully，control measures includes civil engineering works and biological works，where there are 13 check dams which make up cascade check dams，mainly distributing in the debris flow formcirculate region. The type of gravity dams are concrete structure，with both axial ends embedded in the bedrock for about 0.5~1 m. Based on the comparison of the differences on gradient of the ditch，stability of the slope on both sides and erosion rate of debris flow between pre and post construction of the check dams，this paper shows the application of check dams on blocking and storing loss solid mass，stabilizing the ditch bed and bank slope，decreasing gradient of the gully，lowering debris flow velocity and its kinetic energy，and uplifting the base level of debris flow erosion in upstream. According to our research，check dams in Huashiban gully block solid mass 2.76×104 m3，only 0.50% of the total material source(575.1×104 m3)，and 3.3% of the shortterm activity soil source(85×104 m3)，which indicate blocking is not the main function. Check dams stabilize the bed 4.37×104 m3，accounting for 0.76% of the total material source，and 5.2% of the shortterm activity content of debris flow. On the other hand，Check dams stabilize the slope 134.07×104 m3，accounting for 23.3% of the total material source，leading to the decreasing of debris flow source. Gradient of the deposition area has declined to 60%~75%. For debris flows at the same frequency，the velocity，peak flux and erosion rate goes down，sediment transportation reduces by 35%～57%，and erosion base level in the upper ditch was uplifted by 0.3~0.5 m. On the whole，debris flows are translating from viscous flows to turbulent flows，and then high sand content flows.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2012-02-29；改回日期(Accepted) : 2012-03-31。
基金项目（Foundation item）：十二五国家科技支撑项目：龙门山地震带小流域滑坡泥石流灾害监测预警技术研究与示范（2011BAK12B02）。\[“12th Five-Year Plan”National Science & Technology Support Plan Project，research on landslide and debris flow monitoring and warning technical in small watershed along Longmenshan earthquake belt（2011BAK12B02）.\]
作者简介（Biography）：周海波（1985-），男，四川合江人，硕士研究生，岩土工程专业，主要从事山地灾害形成机理及防治技术方面研究。\[Zhou Haibo（1985-），male，born in Hejiang，Sichuan Province，master，geotechnical engineering，majoring in the formation mechanism and prevention technique of debris flow and landslide.\]E-mail：zhouhaibp09@mails.gucas.ac.cn
更新日期/Last Update: 1900-01-01