黄河青石段河道整治工程典型坝垛模型试验
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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 construction of the body width of the proposed width is 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 construction of the body width of the proposed width is 6 m.
引文
[1]马晓阳,岳志春.黄河宁夏段河道治理存在的问题与对策[J].宁夏工程技术,2014,13(4):366-369.
[2]柴青春,张波,赵彦彦.黄河下游河道整治续建工程坝垛型式设计[J].人民黄河,2014,36(12):50-52.
[3]李炜.水力计算手册[M].北京:中国水利水电出版社,2006:15-20.
[4]黄河水利科学研究院.黄河宁夏段河道整治工程关键技术研究[R].郑州:黄河水利科学研究院,2017:18-22.
[5]黄河勘测规划设计有限公司.黄河宁夏河段二期防洪可行性研究报告[R].郑州:黄河勘测规划设计有限公司,2013:266-207.
[6]岳志春.黄河宁夏段河床质对河势变化的影响[J].人民黄河,2016,38(9):34-37.
[7]赵苏磊,马睿.泥沙起动流速公式在天然河流中的验证[J].人民黄河,2012,34(2):42-46.
[8]岳志春,马晓阳.基于2012年洪水后黄河宁夏段河道水面线的合理确定[J].泥沙研究,2016(1):36-39.
[9]包家全,董强,王辉.黄河河道整治工程根石走失原因及防护措施[J].人民黄河,2003,25(11):17-18.
[10]胡一三,刘贵芝,李勇,等.黄河高村至陶城铺河段河道整治[M].郑州:黄河水利出版社,2006:45-50.
[2]柴青春,张波,赵彦彦.黄河下游河道整治续建工程坝垛型式设计[J].人民黄河,2014,36(12):50-52.
[3]李炜.水力计算手册[M].北京:中国水利水电出版社,2006:15-20.
[4]黄河水利科学研究院.黄河宁夏段河道整治工程关键技术研究[R].郑州:黄河水利科学研究院,2017:18-22.
[5]黄河勘测规划设计有限公司.黄河宁夏河段二期防洪可行性研究报告[R].郑州:黄河勘测规划设计有限公司,2013:266-207.
[6]岳志春.黄河宁夏段河床质对河势变化的影响[J].人民黄河,2016,38(9):34-37.
[7]赵苏磊,马睿.泥沙起动流速公式在天然河流中的验证[J].人民黄河,2012,34(2):42-46.
[8]岳志春,马晓阳.基于2012年洪水后黄河宁夏段河道水面线的合理确定[J].泥沙研究,2016(1):36-39.
[9]包家全,董强,王辉.黄河河道整治工程根石走失原因及防护措施[J].人民黄河,2003,25(11):17-18.
[10]胡一三,刘贵芝,李勇,等.黄河高村至陶城铺河段河道整治[M].郑州:黄河水利出版社,2006:45-50.