中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
梳子坝淤砂形态特征试验研究

文献类型:期刊论文

作者欧国强
刊名防灾减灾工程学报
出版日期2005
卷号25期号:3页码:258-265
关键词梳子坝 淤砂形态 淤砂长度 回淤坡度
其他题名Experimental Study of Configuration of Intercepted Sediments by Comb Dam
通讯作者韩文兵
合作状况其它
中文摘要通过室内水槽试验,探讨梳子坝淤砂的形态特征、淤砂长度和回淤坡度等,初步得到:(1)梳子坝在全闭塞时,淤砂形态与实体坝相似,在淤砂区的前部,淤砂高度大致等于坝体高度,在淤砂区的尾部,都有一个明显的陡坎;梳子坝在部分闭塞时,淤砂形态与不闭塞情况下淤砂形态相似,在淤砂区的前部,都有一个缓坡. 不闭塞时形成的缓坡坡度稍大于部分闭塞时的缓坡坡度,但都明显小于水下休止角,表明梳子坝淤砂形态异于狭缝坝.(2)梳子坝淤砂长度与切口宽度有关,大致有随着切口宽度的增大而减短的趋势;切口密度和泥石流浓度对淤砂长度有影响,淤砂长度有大致随切口密度的增大而堆积长度减短的趋势. (3)在相同试验条件下,梳子坝回淤坡度与实体坝相比大致相近,波动范围很小;在相同的切口宽度条件下,切口密度对回淤坡度有一定的影响,同时证明沟床坡度和泥石流的物质级配、容重及规模对回淤坡度也有一定影响.
英文摘要T hr oug h a series of f lume ex periments in the labor ator y, the co nf iguration of intercepted
sediment s by comb Dam, the length and slope of inter cepted sediment s are studied. T he experimental
result s show that ( 1) T he conf ig uration of intercepted sediment s by comb dam in to tal-blocking co ndition
is similar to close-typed dam, and the height of intercepted sediment s is almost equal to the height o f comb
dam near the fo reside of dam body . At the tail of intercepted sediments, there is a steep slope. Under
part-blocking circumstance, the configurat ion is similar to that of o pening , and there is a f lat slope. T he
gr adient of above tw o typed slopes is less than the inter nal frictio n angle of sediment ; ( 2) T he length of intercepted
sediment is r elated to the sl it w idth, and the leng th of intercepted sediment s g radually decreases
w ith the increase of slit w idth. Moreover, the slit density and debris flow concentr at ion also af fect the length
o f intercepted sediment s. ( 3) Under the same ex perimental circumstances, the slope of intercepted
sediment s is similar to that of close-typed dam. With the same slit w idth, slit density af fect the slope of intercepted
sediment s, f lume gradient and scale o f debris f low .
分类号TV649
资助信息中国科学院知识创新工程重要方向项目“南水北调西线工程山地灾害防治技术及环境影响研究”(KZCX3-SW-323);云南省自然科学基金“梳子型切口坝拦砂性能实验研究”项目资助(2004D0054M)
语种中文
公开日期2010-07-14
源URL[http://ir.imde.ac.cn/handle/131551/657]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
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.
APA 欧国强.(2005).梳子坝淤砂形态特征试验研究.防灾减灾工程学报,25(3),258-265.
MLA 欧国强."梳子坝淤砂形态特征试验研究".防灾减灾工程学报 25.3(2005):258-265.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。