黄河青石段河道整治工程典型坝垛模型试验  

Typical Groin Model Test for River Training Project in Qingshi Section of the Yellow River

作　　者：岳志春 周跃华 马晓阳 张羽华 YUE Zhichun;ZHOU Yuehua;MA Xiaoyang;ZHANG Yuhua(Ningxia Flood Control and Drought Relief Headquarters Office, Yinchuan 750001, China;Ningxia Qixing Canal Management Office, Zhongwei 755100, China)

机构地区：[1]宁夏防汛抗旱指挥部办公室,宁夏银川750001 [2]宁夏七星渠管理处,宁夏中卫755100

出　　处：《人民黄河》2019年第2期49-53,82,共6页Yellow River

基　　金：国家重点研发计划项目(52017YFC0405601)

摘　　要：以实际地形、地貌及河道演变为基础,开展了黄河宁夏青石段河道整治工程典型坝垛模型试验,通过不同材料比例对根石备塌体、占体宽度等参数对比分析,结合以往设计成果进行分析,结果表明:青石段丁坝上跨角、坝前头、迎水面等部位,在考虑必要的安全冗余时,备塌体宽度宜取9 m,下跨角、背水面等部位备塌体宽度为5 m左右;在同一流量级下,铅丝笼与散石比例为7∶3时坝体抗冲稳定性更为理想;施工工艺中结合现场实际应采用"金包银"分区抛投与"汉堡包"层叠抛投相结合的根石抛投方式,施工时占体宽度宜为6 m。Based on the actual topography , physiognomy and river course evolution , this paper carried out a typical groin-stack model test for Qingshi section of the Yellow River in Ningxia. Comparing and analyzing the parameters of the collapsed body , the results show that when we consider the necessary safety redundancy , the width of the prepared body should be 9 m and the width of the spare body of the lower span and back surface should be 5 m;under the conditions of the same discharge , the ratio of gabion and loose aggregate is the most suitable for 7 : 3 , the impact stability of the dam body is more ideal;construction technology combined with the actual proposal of the site by using the throwing method of combination of " silver wrapped in gold " partition drop and " hamburger-type " stacking throw for foundation stones and the con-struction of the body width of the proposed width is 6 m.

关 键 词：河道整治工程 根石 备塌体 占体 黄河宁夏青石段 

分 类 号：TV85[水利工程—水利水电工程] TV882.1