摘要
在分析传统堆石丁坝特点的基础上,提出了新型预应力管桩丁坝.以花园口为例,结合正交试验原理对丁坝结构进行设计,采用FLAC3D有限差分程序对其进行数值模拟,分析预应力管桩丁坝结构参数变化对丁坝整体位移的影响规律.数值计算结果表明,对丁坝水平位移的贡献主次顺序为:冲刷深度>桩长>流速>桩间距>桩径>联系梁尺寸;在洪水流量为4 000m3,水流速度为3m/s,冲刷深度为16m的工况下,桩长为25m,桩间距为0.6m,桩径为600mm,联系梁尺寸为0.6m×0.6m的丁坝结构方案最优,强度折减法计算丁坝安全系数为1.32.
New prestressed pipe pile is presented on the basis of analysis of the characteristics of traditional rockfill groins. Take Huayuankou for example, the combination of the orthogonal experiment principle of the spur dikes structure design, the overall displacement law with the parameters change of spur dikes is analyzed by FLAC3D finite difference code. The numerical results show that spur dikes of the horizontal displacement of the contribution of primary and secondary order as follows： the scour depth of pile length 〉 flow rate 〉 pile spacing and pile diameter 〉 contacts beam size; under the operation conditions of flood flow 4 000 m3 , water velocity of 3 m/s, the scour depth is 16m operating conditions, the spur dikes structure program of the pile length 25m 0.6m pile spacing, pile diameter is 600 ram, contact beam size is 0.6 m x0.6 m is optimal, to the safety factor of strength reduction method is 1.32.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2012年第5期96-99,129,共5页
Journal of Zhengzhou University（Engineering Science）
基金
农业科技成果转化资金项目(2011GB23320003)
