四棱台状防汛堵口多面体混凝土预制块设计
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摘要
多面体混凝土预制块具有体积大、重量重、易于预制、取材方便、生态环保、抗冲能力强、能快速封堵决口等优点,近年来在防汛堵口抢险工程中逐步得到应用.基于此,结合城市内河河流特征,对一种四棱台状多面体混凝土预制块进行了构件形状设计、水流冲击力计算、抗冲击力计算和稳定系数计算,并给出了应用于决口封堵工程实际的自重分别约为1.0 t和1.6 t的四棱台状多面体混凝土预制块的2个构建方案及其造价,可供河湖堤防决口封堵抢险工程参考.
Polyhedral prefabricated concrete blocks are a kind of new technology for the flood prevention and levee breach closure with good characteristic of bulk mass,heavy weight,easy precasting,convenient material drawing,eco-friendly protection,strong anti-scouring and fast levee breach closure.In recent years,polyhedral prefabricated concrete blocks are used for flood prevention and levee breach closure step by step with good application effect.Therefore,on the base of the intensive study on the characteristics of city inland rives,the paper carries out the shape design,the calculation for the impact of the current against the shore,the calculation for the impact resistance and the calculation for the stability coefficient for the polyhedral prefabricated concrete blocks in quadrangular frustum pyramid.Two construction plans and two kinds of construction cost have been put forward for the polyhedral prefabricated concrete blocks in quadrangular frustum pyramid with the weight of 1 ton and 2 ton.The study results of the paper can provide some references for the flood prevention and levee breach closure.
Polyhedral prefabricated concrete blocks are a kind of new technology for the flood prevention and levee breach closure with good characteristic of bulk mass,heavy weight,easy precasting,convenient material drawing,eco-friendly protection,strong anti-scouring and fast levee breach closure.In recent years,polyhedral prefabricated concrete blocks are used for flood prevention and levee breach closure step by step with good application effect.Therefore,on the base of the intensive study on the characteristics of city inland rives,the paper carries out the shape design,the calculation for the impact of the current against the shore,the calculation for the impact resistance and the calculation for the stability coefficient for the polyhedral prefabricated concrete blocks in quadrangular frustum pyramid.Two construction plans and two kinds of construction cost have been put forward for the polyhedral prefabricated concrete blocks in quadrangular frustum pyramid with the weight of 1 ton and 2 ton.The study results of the paper can provide some references for the flood prevention and levee breach closure.
引文
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[2]房世龙,施小飞.三杆六脚透水架体护滩水力特性试验[J].水运工程,2015(4):157-162.
[3]房世龙,钱俊峰,施小飞.河流岸滩冲刷笛卡尔架构块抛投防护效果试验[J].人民黄河,2015,37(9):49-53.
[4]焦璀玲,刘建磊,王昊,等.南水北调东线山东段垂直联锁混凝土预制块质量控制[J].水电能源科学,2015(9):121-123.
[5]房世龙,钱俊峰,施小飞.圆柱桥墩清水局部冲刷透水三杆架体防护特性试验研究[J].水电能源科学,2015,33(8):98-102.
[6]房世龙,陈红,施小飞.三杆六脚体对桥墩周围流场影响的试验研究[J].人民长江,2015,46(10):61-66.
[7]王旭君,饶艳,魏继中,等.连锁反滤凹槽混凝土预制块结构的改良设计[J].人民长江,2012(S1):22-24.
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[9]孙芦忠,赵建均,严建国,等.堤防决口的水力学试验研究[J].人民长江,2003,34(11):41-42.
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