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黏性泥石流拦沙坝受力及稳定性分析
Alternative TitleLoading and stability analyses of viscous debris flow check dam
孙昊1,2,3; 游勇1,2; 柳金峰1,2; 林雪平1,2,3
2018
Source Publication中国科学院大学学报
ISSN2095-6134
Volume35Issue:5Pages:635-644
SubtypeArticle
Contribution Rank1
Abstract拦沙坝是泥石流防治中最常见和最有效的工程措施,稳定性计算是拦沙坝工程设计中的重要部分.在拦沙坝荷载组合与稳定性分析的基础上,推导空库工况和半库工况黏性泥石流过流时坝体稳定性系数的表达式,对比分析不同条件下坝体稳定性的变化规律.研究认为,在一定条件下,空库工况并不总是较危险工况,而半库工况在运行过程中表现出更不利的发展趋势;相同条件下半库工况时坝体稳定性系数随着库内淤积物厚度的增大而减小,即拦截相同来流时库内淤积越满坝体越偏于危险;研究还发现,迎水面坡比对拦沙坝稳定性的影响随着不断来流而逐渐减小,因此,建议在实际工程中可将迎水面设计为下部缓上部相对陡的折线型,以减少拦沙坝建设成本,提高工程价值.
Other AbstractAs a counter measure,check dam has been constructed widely because of its obvious advantages. Stability analysis is one of the most important contents in engineering designs of a check dam. Based on analysis of loading combination in this work,a mathematical expression of stability coefficient has been reduced when reservoir of check dam has or has not a deposition. The expression shows a decreasing variation in stability coefficient basically in intercepting process. Through the contrastive analyses of different working conditions of check dam,the results show that check dam having a deposition in reservoir is more dangerous than that harving no deposition,when intercepting earlier arrays of debris flow. The thicker the deposition behind check dam is the more dangerous. Finally the relationship between stability and upstream slope of check dam has been discussed. The results indicate that the effect of upstream slope of check dam decreases when intercepting debris flow continuously. Then a fold-line shaped upstream slope of check dam,which is gentle in the downside and steep in the upside,is suggested for engineering design.
Keyword黏性泥石流 拦沙坝 荷载组合 稳定性分析
Indexed ByCSCD
Language中文
CSCD IDCSCD:6332273
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/24456
Collection山地灾害与地表过程重点实验室
Corresponding Author游勇
Affiliation1.中国科学院山地灾害与地表过程重点实验室,成都610041;
2.中国科学院水利部成都山地灾害与环境研究所,成都610041;
3.中国科学院大学,北京100049
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
孙昊,游勇,柳金峰,等. 黏性泥石流拦沙坝受力及稳定性分析[J]. 中国科学院大学学报,2018,35(5):635-644.
APA 孙昊,游勇,柳金峰,&林雪平.(2018).黏性泥石流拦沙坝受力及稳定性分析.中国科学院大学学报,35(5),635-644.
MLA 孙昊,et al."黏性泥石流拦沙坝受力及稳定性分析".中国科学院大学学报 35.5(2018):635-644.
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