拦沙坝调节泥石流拦挡与输移性能的试验研究

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摘要拦沙坝是泥石流防治措施中的一种重要拦蓄拦挡工程，在野外调查的基础上，结合防护体系配置优化的新思路展开试验研究。在室内二维水槽模型试验中，通过改变泥石流容重、一次过程体积总量和模型坝的开孔率等控制参数，得出泥石流性能在过坝前、后的变化规律。试验结果表明：(1) 回淤坡度随泥石流容重、一次输移体积总量的增大和开孔率的减小而增大。泥石流容重越小，输移体积总量和坝身开孔率对坡度的影响越大。(2) 当泥石流一次过程输移总量不超过拦沙坝库容时，开孔率2.2%时的流量变化量为6.6%时的2倍左右。(3) 在相同的排水孔过流方式下，可用二次式来拟合物料容重与容重比值的关系。由该拟合式可推出容重为15.67 kN/m3时，容重变化程度最大。(4) 引入D50比值作为表征拦沙坝分选泥石流能力的参数，比较泥石流过坝时的颗粒变化情况，稀性泥石流经过拦沙坝时，其“拦粗排细”作用最突出。

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关键词 ：工程地质, 拦沙坝, 回淤坡度, 流量, 容重变化, 颗粒分选

Abstract：Silt-trap dam is an important debris flow preventive measure with a large cubage. According to the forms and circs of the dams summarized and a new notion of the system collocating optimization，the experiment on regulating properties of debris flow by the silt-trap dam has been performed. In the experiment，bulk density，gross and the rate of the drainage hole are changed to analyze the property variation law of debris flow. The experimental results show that：(1) The gradient of intercepted sediments increases with the increase of bulk density and gross of debris flow，and the decrease of rate of drainage hole. The bulk density is smaller，the effects of the gross and rate of drainage hole on the gradient are larger. (2) When the gross of the debris flow is less than the cubage，the value of the flux changing with a drainage hole rate 2.2% is twice to that with a rate 6.6%. (3) Under the same over-current of the drainage hole mode，the former bulk density gets a square formula relation with its ratio to the latter. With the formula，we find that when the bulk density is 1.567 kN/m3，the change of bulk density before and after experiment is the biggest. (4) The ratio of D50 between before and after the experiment is proposed to scale the selection property of the dam and compare the change of grain diameter. The dam gets the most evidently effect of leaving the coarse grain and passing the fine grain when the watery debris flow passes through the dam.

Key words： engineering geology silt-trap dam gradient of intercepted sediments flow rate change of bulk density grain selection

收稿日期: 2011-04-22

引用本文:

贾世涛1，2，崔鹏3，陈晓清3，黄凯3，李强3. 拦沙坝调节泥石流拦挡与输移性能的试验研究[J]. 岩石力学与工程学报, 2011, 30(11): 2338-2345.
JIA Shitao1，2，CUI Peng3，CHEN Xiaoqing3，HUANG Kai3，LI Qiang3. EXPERIMENTAL STUDY OF REGULATING BARRAGE AND TRANSPORTATION PROPERTIES OF DEBRIS FLOW BY SILT-TRAP DAM. , 2011, 30(11): 2338-2345.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I11/2338

[4]	马东涛. 舟曲“8•8”特大泥石流灾害治理之我见[J]. 山地学报，2010，28(5)：635-640.(MA Dongtao. Some suggestions on controlling catastrophic debris flows on Aug. 8th，2010 in Zhouqu，Gansu[J]. Journal of Mountain Science，2010，28(5)：635-640.(in Chinese)) " target="_blank">
[6]	曾庆利，岳中琦，杨志法，等. 谷坊在泥石流防治中的作用——以云南蒋家沟2条支沟对比为例[J]. 岩石力学与工程学报，2005，24(17)：3 137-3 145.(ZENG Qingli，YUE Zhongqi，YANG Zhifa，et al. Functions of check dam against debris flow—comparison of two watersheds of Jiangjia gully，Yunnan，China[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 137-3 145.(in Chinese)) " target="_blank">
[8]	LIEN H P. Design of slit dams for controlling stony debris flows[J]. International Journal of Sediment Research，2003，18(1)：74-87. " target="_blank">
[10]	韩文兵，欧国强. 梳子坝淤砂形态特征试验研究[J]. 防灾减灾工程学报，2005，25(3)：258-265.(HAN Wenbing，OU Guoqiang. Experimental study of configuration of intercepted sediments by comb dam[J]. Journal of Disaster Prevention and Mitigation Engineering，2005，25(3)：258-265.(in Chinese)) " target="_blank">
[12]	潘华利，欧国强，黄江成. 泥石流坝后侵蚀坑内部边坡规律实验研究[J]. 泥沙研究，2009，(6)：1-5.(PAN Huali，OU Guoqiang，HUANG Jiangcheng. Experimental study on the interior slope of scour pit below debris flow sabo dams[J]. Journal of Sediment Research，2009，(6)：1-5.(in Chinese)) " target="_blank">
[14]	李德基. 泥石流减灾理论与实践[M]. 北京：科学出版社，1997：29-49.(LI Deji. Theory and practice about reducing debris-flow hazards[M]. Beijing：Science Press，1997：29-49.(in Chinese)) " target="_blank">
[16]	陈中学，汪稔，胡明鉴，等. 云南东川蒋家沟泥石流形成内因初探[J]. 岩土力学，2009，30(10)：3 053-3 056.(CHEN Zhongxue，WANG Ren，HU Mingjian，et al. Study of internal factors for debris flow occurrence in Jiangjia Ravine，Dongchuan of Yunnan[J]. Rock and Soil Mechanics，2009，30(10)：3 053-3 056.(in Chinese)) " target="_blank">
[3]	胡凯衡，葛永刚，崔鹏，等. 对甘肃舟曲特大泥石流灾害的初步认识[J]. 山地学报，2010，28(5)：628-634.(HU Kaiheng，GE Yonggang，CUI Peng，et al. Preliminary analysis of extra-large-scale debris flow disaster in Zhouqu County of Gansu Province[J]. Journal of Mountain Science，2010，28(5)：628-634.(in Chinese)) " target="_blank">
[7]	水山高久，阿部宗平，矢岛重美，等. 狭缝拦砂坝的流量系数与淤砂形状[J]. 水土保持科技情报，1994，(4)：9-10.(MIZUYAMA Takahisa，ABE Sohei，YASHIMA Shigemi，et al. Flow coefficients and configuration of intercepted sediments with slit sabo dams[J]. Scientific and Technical Information of Soil and Water Conservation，1994，(4)：9-10.(in Chinese)) " target="_blank">
[11]	吕娟，韩文兵. 泥石流缝隙坝对龙头泥砂体积浓度变化影响试验研究[J]. 水土保持研究，2009，16(2)：68-71.(LU Juan，HAN Wenbing. Experiment on variety of surge sediment volume concentration with debris flow passing through silt dam[J]. Research of Soil and Water Conservation，2009，16(2)：68-71.(in Chinese))
[15]	游勇，程尊兰. 西藏波密米堆沟泥石流堵河模型试验[J]. 山地学报，2005，23(3)：288-293.(YOU Yong，CHENG Zunlan. Modeling experiment of debris flow in Bomimi Gully，Tibet[J]. Journal of Mountain Science，2005，23(3)：288-293.(in Chinese)) " target="_blank">
[1]	王继康，黄荣鉴，丁秀燕. 泥石流防治工程技术[M]. 北京：中国铁道出版社，1996：160-180.(WANG Jikang，HUANG Rongjian，DING Xiuyan. Engineering technologies of debris flow prevention[M]. Beijing：China Railway Publishing House，1996：160-180.(in Chinese)) " target="_blank">
[2]	吴积善，田连权，康志成，等. 泥石流及其综合治理[M]. 北京：科学出版社，1993：30-41.(WU Jishan，TIAN Lianquan，KANG Zhicheng，et al. Debris flow and its comprehensive treatment[M]. Beiijing：Science Press，1993：30-41.(in Chinese)) " target="_blank">
[5]	周必凡，高考. 拦沙坝在防治泥石流中的作用[C]// 泥石流论文集. 重庆：科学技术文献出版社重庆分社，1981：118-121.(ZHOU Bifan，GAO Kao. Role of silt-trap dams in preventing debris flows[C]// Proceedings of Debris Flows. Chongqing：Scientific and Technological Literature Publishing House，Chongqing Branch，1981：118-121.(in Chinese)) " target="_blank">
[9]	韩文兵，欧国强. 单切口坝对稀性泥石流的拦砂性能——试验研究与比较分析[J]. 自然灾害学报，2008，17(4)：152-158.(HAN Wenbing，OU Guoqiang. Sediment-intercepting effect of slit dam on non-viscous debris flow—experimental study and comparative analysis[J]. Journal of Natural Disasters，2008，17(4)：152-158.(in Chinese)) " target="_blank">
[13]	潘华利，欧国强. 泥石流坝后侵蚀坑纵剖面形态及最大深度实验研究[J]. 防灾减灾工程学报，2009，29(6)：684-689.(PAN Huali，OU Guoqiang. Experimental study of the shape and the maximum depth of scour pit below debris flow sabo dam[J]. Journal of Disaster Prevent ion and Mitigation Engineering，2009，29(6)：684-689.(in Chinese)) " target="_blank">
[17]	四川省水利电力厅. 四川省中小流域暴雨洪水计算手册[M]. 成都：四川省水利电力厅，1984：9-15.(Water Resources and Electric Office of Sichuan Province. Rainstorm and flood calculation manual of small valley in Sichuan Province[M]. Chengdu：Water Resources and Electric Office of Sichuan Province，1984：9-15.(in Chinese)) " target="_blank">