堆积体作用下缓坡河道水深分布规律实验研究
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摘要
滑坡、泥石流等地质灾害产生的松散土体常在河流岸边形成大型堆积体,缩窄了主河道过流宽度,压缩主河流路,对水流运动产生影响。本文通过水槽试验,研究了堆积体作用下缓坡河道水深沿程及横向分布规律。在堆积体作用下,河道水深沿程分布发生规律性变化,其具体表现为:堆积体上游段水位壅高;堆积体段水深急剧降低;堆积体下游段,在扩散作用下,水位逐渐恢复到无堆积体条件下的天然水位。堆积体附近水深沿横断面的分布相比天然情况下表现为:堆积体上游壅水最大值在堆积体侧上游,远离堆积体一岸,相对水深逐渐减小;堆积体所在断面,从堆积体侧至对岸相对水深缓慢增大。随堆积体尺度的增加,堆积体对河道水深沿程及横向分布的影响也愈加强烈。
Landslides,mudslides and other geological disasters resulting loose soil oftenaccumulated in the river shore to form large-scale accumulation body,is narrowing of the main river channel over current width,compress the main river bed,on the water movement impact.In this paper,flume experiments to study the accumulation bodyunder gentle river water depth along the way and horizontal distribution.In the stackedbody under the action of river water depth along the distribution changed regularly,and its specific performance:Accumulation upstream water level obstruct higher;accumulation body segment depth drastically reduced;accumulation body downstream section,the diffusion effect,the water level gradually returned to no accumulation bodycondition of natural water.Accumulation body near the water depth along the cross-sectional distribution compared to the natural situation as follows:accumulation bodyupstream backwater maximum in stacked side upstream,away from the accumulation body a shore,relative water depth decreases;accumulation body where the cross-section,from the accumulation of body side to the other side of the relative depthincreases slowly.With the accumulation of body scales increased accumulation body onriver water depth along the way and horizontal distribution of has become even moreintense.
Landslides,mudslides and other geological disasters resulting loose soil oftenaccumulated in the river shore to form large-scale accumulation body,is narrowing of the main river channel over current width,compress the main river bed,on the water movement impact.In this paper,flume experiments to study the accumulation bodyunder gentle river water depth along the way and horizontal distribution.In the stackedbody under the action of river water depth along the distribution changed regularly,and its specific performance:Accumulation upstream water level obstruct higher;accumulation body segment depth drastically reduced;accumulation body downstream section,the diffusion effect,the water level gradually returned to no accumulation bodycondition of natural water.Accumulation body near the water depth along the cross-sectional distribution compared to the natural situation as follows:accumulation bodyupstream backwater maximum in stacked side upstream,away from the accumulation body a shore,relative water depth decreases;accumulation body where the cross-section,from the accumulation of body side to the other side of the relative depthincreases slowly.With the accumulation of body scales increased accumulation body onriver water depth along the way and horizontal distribution of has become even moreintense.
引文
[1]朱颖彦,崔鹏,陈晓晴.泥石流堆积体边坡失稳机理的实验与稳定性分析.岩石力学与工程学报,2006,Vlo1.24 No.21.
[2]巨能攀,黄润秋,涂国祥.含水砂层对堆积体稳定性的影响研究[J].工程地质学报,No.4,476-480,2006.
[3]董志高,吴继敏,王文远.地震作用崩塌堆积体边坡稳定性分析[J].水利水电科技进展,2006.5,37-40.
[4]郭志学,彭清娥,汤雷,刘家富,苏杨中.堆积体作用下陡坡河道流速沿程及横向分布规律研究.水利水运工程学报,2011,12.27-13.
[5]刘家富等.堆积体对河道流速分布影响研究.水利水电技术,2011,11.42(11)38-42.
[6]苏杨中.堆积体作用下河道水、沙输移规律研究[D].四川大学硕士学位论文,2012.
[2]巨能攀,黄润秋,涂国祥.含水砂层对堆积体稳定性的影响研究[J].工程地质学报,No.4,476-480,2006.
[3]董志高,吴继敏,王文远.地震作用崩塌堆积体边坡稳定性分析[J].水利水电科技进展,2006.5,37-40.
[4]郭志学,彭清娥,汤雷,刘家富,苏杨中.堆积体作用下陡坡河道流速沿程及横向分布规律研究.水利水运工程学报,2011,12.27-13.
[5]刘家富等.堆积体对河道流速分布影响研究.水利水电技术,2011,11.42(11)38-42.
[6]苏杨中.堆积体作用下河道水、沙输移规律研究[D].四川大学硕士学位论文,2012.
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