Email Alerts
RSS
Experimental studies on flow profile of permeable spur dikes in upper reaches of Yangtze River
-
摘要: 丁坝是长江上游航道整治中最常用的整治建筑物，工程实践中多采用抛石透水丁坝，此类丁坝具有一定透水性, 在现有丁坝水沙特性研究中极少考虑透水性对此类丁坝的影响。不同的空隙率和空隙尺寸对改善透水丁坝附近水位场及流速场具有不同效果。通过水槽概化模型试验，研究了3种空隙尺寸和5种空隙率工况下透水丁坝周围水面线分布情况，对比分析了不同空隙率和不同空隙尺寸等因素对透水丁坝周围水面线的影响规律。结果表明：相比实体丁坝，在一定的空隙率和空隙尺寸条件下，透水丁坝对其上游的壅水效果更佳，同时还可增加其下游水深，降低纵横向水面比降，对改善丁坝右侧束窄段水流形态、减轻丁坝水毁、延长其使用年限以及改善生态环境等方面也具有更积极的作用。Abstract: The spur dike is one of the most frequently-used hydraulic structures in the waterway regulation works of the upper reaches of the Yangtze River. And in the engineering practice, the riprap permeable spur dikes are often used in the waterway regulation projects because they have certain permeability. In the studies of water-sediment characteristics of the spur dikes, the influences of permeability on the existing spur dikes located in the Yangtze River are seldom considered. Different porosities and void sizes have different effects on improving the water level field and velocity field near the permeable spur dikes. Based on the flume generalization model tests, studies of the flow profile distribution around the permeable spur dikes under the conditions of three void sizes and five porosities are carried out in this research. And the influence law of different void sizes and different porosities on the flow profile around the permeable spur dikes is understood through comparative analysis. The analysis results show that the backwater effect of the permeable spur dikes is better than that of the solid spur dikes under certain void ratios and void sizes. The permeable spur dikes can also increase the downstream water depth and reduce the vertical and horizontal water surface gradients, which has a more positive effect on improving the flow patterns of the narrow section of the right bundle of the permeable spur dikes, thus reducing the damage of the permeable spur dikes, prolonging the service life and improving the ecological environment. The research results have certain reference value for the design of waterway regulation structures and the improvement of waterway regulation effect in the middle and upper reaches of the Yangtze River.
-
Key words:
- permeable spur dike /
- porosity (void ratio) /
- flow profile /
- void size
-
图 1 丁坝横断面及水位测点分布(单位：cm)
Figure 1. Cross-section of spur dike and distribution of water level measuring points (unit: cm)
图 2 不同空隙率条件下透水丁坝不同纵断面水面线分布
Figure 2. Flow profile distribution of different longitudinal sections of permeable spur dikes under different porosities
图 3 不同空隙尺寸条件下透水丁坝不同纵断面水面线分布
Figure 3. Flow profile distribution of different longitudinal sections of permeable spur dikes under different void size conditions
图 4 不同空隙率条件下透水丁坝不同横断面水面线分布
Figure 4. Flow profile distribution of different cross sections of permeable spur dikes under different porosities
-
[1] UIJTTEWAAL W S. Effects of groyne layout on the flow in groyne fields: laboratory experiments[J]. Journal of Hydraulic Engineering, 2005, 131(9): 782-791. doi: 10.1061/(ASCE)0733-9429(2005)131:9(782) [2] MOSTAFA M M, AHMED H S H, ABOZIED G A, et al. Experimental study on flow characteristics around single groyne with different permeability in compound channel floodplain[C]//2013 IAHR Congress. Beijing: Tsinghua University Press, 2013. [3] AHMED H S H, MOSTAFA M M, ABOZIED G A, et al. Flow analysis around groyne withdifferent permeability in compoundchannel floodplains[J]. Journal of Engineering Sciences, 2013, 41(2): 302-320. https://www.researchgate.net/publication/258861241_FLOW_ANALYSIS_AROUND_GROYNE_WITH_DIFFERENT_PERMEABILITY_IN_COMPOUND_CHANNEL_FLOODPLAINS [4] 李明龙, 王平义, 刘怀汉, 等.山区河流双丁坝水面线试验研究[J].中国水运, 2014, 14(11): 215-219. http://d.old.wanfangdata.com.cn/Periodical/zgsy-xby201411088 LI Minglong, WANG Pingyi, LIU Huaihan, et al. Experimental study on the water surface of the double dam in mountain rivers[J]. China Water Transport, 2014, 14(11): 215-219. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/zgsy-xby201411088 [5] 张可.不同结构形式丁坝水流特性研究[D].重庆: 重庆交通大学, 2012. http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=Y2104651 ZHANG Ke. Study on water flow characteristics of spur dikes with different structures[D]. Chongqing: Chongqing Jiaotong University, 2012. (in Chinese) http://www.wanfangdata.com.cn/details/detail.do?_type=degree&id=Y2104651 [6] 许光祥, 程昌华, 刘建新.丁坝对河道水位影响的试验研究[J].重庆交通学院学报, 1994, 13(4): 48-53. http://www.cnki.com.cn/Article/CJFDTotal-CQJT404.006.htm XU Guangxiang, CHENG Changhua, LIU Jianxin. Influence on water-surface-profile at the reach of river with spur-dike[J]. Journal of Chongqing Jiaotong Institute, 1994, 13(4): 48-53. (in Chinese) http://www.cnki.com.cn/Article/CJFDTotal-CQJT404.006.htm [7] 李志勤, 李洪, 李嘉, 等.溢流丁坝附近自由水面的实验研究与数值模拟[J].水利学报, 2003(8): 53-57. doi: 10.3321/j.issn:0559-9350.2003.08.011 LI Zhiqin, LI Hong, LI Jia, et al. Experimental study and numerical simulation of flow in the vicinity of a submerged spur-dike[J]. Journal of Hydraulic Engineering, 2003(8): 53-57. (in Chinese) doi: 10.3321/j.issn:0559-9350.2003.08.011 [8] 周银军, 刘焕芳, 何春光, 等.桩柱透水丁坝水流特性试验研究[J].泥沙研究, 2009(5): 58-62. doi: 10.3321/j.issn:0468-155X.2009.05.010 ZHOU Yinjun, LIU Huanfang, HE Chunguang, et al. Experimental study on water flow characteristics of pile permeable spur dike[J]. Journal of Sediment Research, 2009(5): 58-62. (in Chinese) doi: 10.3321/j.issn:0468-155X.2009.05.010 [9] YU Tao, WANG Pingyi, CHEN Li. Experimental study of the stability of spur dyke for different types[J]. Journal of Applied Sciences, 2013(19): 4040-4045. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=Doaj000003581289 [10] 丁晶晶, 陆彦, 陆永军.透水框架在改进丁坝结构型式上的应用[J].水利水运工程学报, 2014(6): 30-38. doi: 10.3969/j.issn.1009-640X.2014.06.005 DING Jingjing, LU Yan, LU Yongjun. Application of permeable frame in improving spur dyke structures[J]. Hydro-Science and Engineering, 2014(6): 30-38. (in Chinese) doi: 10.3969/j.issn.1009-640X.2014.06.005 [11] 郑惊涛.透水框架坝生态效应研究[J].水运工程, 2018(12): 16-20. doi: 10.3969/j.issn.1002-4972.2018.12.004 ZHENG Jingtao. Study on ecological effects of penetrating frame dam[J]. Port and Waterway Engineering, 2018(12): 16-20. (in Chinese) doi: 10.3969/j.issn.1002-4972.2018.12.004 [12] 贺伟军, 樊新建, 赵文举, 等.透水丁坝研究简介及展望[J].价值工程, 2018(22): 276-280. http://d.old.wanfangdata.com.cn/Periodical/jzgc201822116 HE Weijun, FAN Xinjian, ZHAO Wenju, et al. A brief introduction and prospect of permeable spur dike study[J]. Value Engineering, 2018(22): 276-280. (in Chinese) http://d.old.wanfangdata.com.cn/Periodical/jzgc201822116 [13] 刘焕芳, 周银军, 宗全利, 等.透水丁坝壅水高度探讨[J].人民长江, 2008, 39(5): 37-39. doi: 10.3969/j.issn.1001-4179.2008.05.014 LIU Huanfang, ZHOU Yinjun, ZONG Quanli, et al. Discussion on the height of drowning sluice water[J]. Yangtze River, 2008, 39(5): 37-39. (in Chinese) doi: 10.3969/j.issn.1001-4179.2008.05.014 [14] 李玉建, 侍克斌, 李凯.单排井柱桩透水丁坝的阻水缓流作用分析[J].人民黄河, 2008, 30(8): 89-90. doi: 10.3969/j.issn.1000-1379.2008.08.040 LI Yujian, SHI Kebin, LI Kai. Analysis of water-blocking and slow-flow effect of single-row well column permeable spur dike[J]. Yellow River, 2008, 30(8): 89-90. (in Chinese) doi: 10.3969/j.issn.1000-1379.2008.08.040 -
下载:
点击查看大图
图(5)
计量
- 文章访问数: 430
- HTML全文浏览量: 163
- PDF下载量: 15
- 被引次数: 0
