IMHE OpenIR  > 山地灾害与地表过程重点实验室
粘性泥石流坝后回淤比降的实验
Alternative TitleExperiment on Siltation Gradient of Viscous Debris Flow behind Gravity Check-dam
吴鑫; 马东涛; 杨敏
Corresponding Author马东涛
2013
Source Publication山地学报
Volume31Issue:5Pages:594-600
Other Abstract拦挡坝坝后回淤比降是泥石流防治工程设计中的一个重要参数。本实验选取粘性泥石流,开展了沟床纵比降为9.5%~26.2%共8组和重度17~22 kN/m3共6组的坝后回淤比降的模拟实验。实验发现:1.在沟床纵坡为9.5%、12.1%、14.4%、16.7%、18.9%、21.3%、23.8%和26.2%时,其回淤比降分别为8.08%、9.8%、11.38%、12.69%、14.55%、16.61%、18.56%和20.96%;2.回淤比降比值在0.76至0.85间,平均0.80;3.回淤比降随沟槽纵比降的增大而增大,二者呈线性正相关,相关系数在0.95以上;回淤比降随重度的增大,总体呈缓慢增大的趋势,关系为二次函数关系。由此建立了回淤比降与重度和沟床纵比降的关系式:i=0.6014×γ0.0526×i0.94700,据此可以初步确定回淤比降的设计值。 
; The siltation gradient is an important parameter for designing gravity check-dam of debris flow,which is not only influencing the judgment of the height, the distance between dams, the deposit capacity of debris flow reservoir,but also the mitigation benefit and engineering life of check-dams. The siltation gradient is affected by the gradient
of gully bed, the density, flow velocity and discharge,and grain compositions of debris flow et al factors,among which the gradient of gully bed and the density are most important than others. By using the viscous debris flow in the laboratory, simulation experiments are carried out under 8 groups of the gradient of gully bed and 6 groups of
densities. After the experiment finished, the influences of gradient of gully bed and the density of debris flow to siltation back check-dam,and the relationship between them are studied and analyzed. The following results are achieved through the experiment: 1. under the same density, the siltation gradient is 8. 08%,9. 8%,11. 38%,12. 69%,14. 55%,16. 61%,18. 56 % and 20. 96% respectively while the gradient is 9. 5%,12. 1%,14. 4%, 16. 7%, 18. 9%, 21. 3%, 23. 8% and 26. 2%; 2. The gradient ratio parameter value K is between 0. 76 and 0. 85,the mean value is 0. 80,which can be used as designing data; 3. The siltation gradient is increasing with the increase
of the gradient of gully bed,and there is a linear relationship between them. The gradient of back siltation is increased slowly with the increase of density of debris flow, they have a quadratic relationship each other; 4. the relationship of the siltation gradient i with gradient of gully bed i0 and the density of debris flow γ is: i = 0. 6014 × γ0. 0526 × i0. 9470 0 ,which can be used for calculating i; 5. under the same dam height, the siltation gradient viscous debris flow is relative greater than thin debris flow.
Keyword粘性泥石流 拦挡坝 重度 沟床纵坡 回淤比降 回淤比降比值
Indexed ByCSCD
Language中文
CSCD IDCSCD:4951839
Funding Organization地质灾害防治与地质灾害保护国家重点实验室开放基金资助项目(GZ2007-15);中铁二院工程集团有限责任公司科研项目“成兰铁路桥梁工程泥石流防治技术研究”
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6468
Collection山地灾害与地表过程重点实验室
Recommended Citation
GB/T 7714
吴鑫,马东涛,杨敏. 粘性泥石流坝后回淤比降的实验[J]. 山地学报,2013,31(5):594-600.
APA 吴鑫,马东涛,&杨敏.(2013).粘性泥石流坝后回淤比降的实验.山地学报,31(5),594-600.
MLA 吴鑫,et al."粘性泥石流坝后回淤比降的实验".山地学报 31.5(2013):594-600.
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