Loading and stability analyses of viscous debris flow check dam

doi:10.7523/j.issn.2095-6134.2018.05.010

Abstract

Abstract: As 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.

Key words: viscous debris flow, check dam, loading combination, stability analysis

CLC Number:

P642.23

SUN Hao, YOU Yong, LIU Jinfeng, LIN Xueping. Loading and stability analyses of viscous debris flow check dam[J]. , 2018, 35(5): 635-644.

References

[1] 李德基. 泥石流减灾理论与实践[M]. 北京:科学出版社, 1997.
[2] 周必凡, 李德基, 罗德富, 等. 泥石流防治指南[M]. 北京:科学出版社, 1991.
[3] 贾世涛, 崔鹏, 陈晓清, 等. 拦沙坝调节泥石流拦挡与输移性能的试验研究[J]. 岩土力学与工程学报, 2011, 30(11):2338-2345.
[4] 曾庆利, 岳中琦, 杨志法,等. 谷坊在泥石流防治中的作用[J]. 岩石力学与工程学报, 2005, 24(17):3137-3145.
[5] 周伟. 拦砂坝作用下的泥石流容重衰减特征及其对排导纵坡的影响[D]. 北京:中国科学院大学, 2011.
[6] Farouk M, Haruyuki H, Shinya I, et al. Effect of two successive check dams on debris flow deposition[R]. Padua, Italy:5th International Conference on Debris-Flow Hazards Mitigation:Mechanics, Prediction and Assessment, 2011.1073-1082.
[7] 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.
[8] Pan H L, Wang R, Huang J C, et al. Study on the ultimate depth of scour pit downstream of debris flow sabo dam based on the energy method[J]. Engineering Geology, 2013, 160:103-109.
[9] 张宇, 韦方强, 王青. 基于动量守恒的粘性泥石流冲击力计算[J]. 泥沙研究, 2006(3):23-26.
[10] 陈洪凯, 唐红梅, 鲜学福, 等. 泥石流冲击特性模型试验[J].重庆大学学报, 2010, 33(5):114-119.
[11] 唐金波,胡凯衡,周公旦,等.基于小波分析的泥石流冲击力信号处理[J].四川大学学报(工程科学版),2013,45(1):8-13.
[12] 陈宁生, 周海波, 卢阳, 等. 西南山区泥石流防治工程效益浅析[J]. 成都理工大学学报(自然科学版), 2013, 40(1):50-58.
[13] 林雪平.泥石流拦砂坝溢流口过流能力实验研究[D].成都:中国科学院成都山地灾害与环境研究所,2014.
[14] 李承泽. 不同降雨量下泥石流拦挡坝坝基渗流及渗透变形研究[D]. 重庆:重庆大学,2013.
[15] 汪惠. 宽级配土中细颗粒含量与泥石流拦砂坝底扬压力的关系[D]. 绵阳:西南科技大学, 2015.
[16] 王显林, 马东涛, 黄海, 等. 泥石流拦砂坝抗滑稳定性与剖面参数的关系[J]. 安全与环境学报, 2010, 10(6):197-201.
[17] Lin X, You Y, Liu J, et al. A tentative study on the stability of a check dam[J]. Advances in Earth & Environmental Sciences, 2013:53-59.
[18] 蒋忠信.震后山地地质灾害治理工程设计概要[M].成都:西南交通大学出版社,2013.
[19] 何思明, 吴永, 沈均. 泥石流大块石冲击力的简化计算[J]. 自然灾害学报, 2009, 18(5):51-56.
[20] 何思明, 李新坡, 吴永. 考虑弹塑性变形的泥石流大块石冲击力计算[J]. 岩石力学与工程学报, 2007, 26(8):1664-1669.
[21] 陈剑, 王全才, 陈颖骐, 等. 基于Hertz理论的泥石流大块石冲击力修正计算[J]. 哈尔滨工业大学学报, 2017, 49(2):124-129.
[22] He S, Liu W, Li X. Prediction of impact force of debris flows based on distribution and size of particles[J]. Environmental Earth Sciences, 2016,75(4):1-8.DOI:10.1007/s12665-015-5180-2.
[23] 曾超, 苏志满, 雷雨,等. 泥石流浆体与大颗粒冲击力特征的试验研究[J]. 岩土力学, 2015, 36(7):1923-1930.