摘要
为了研究河道开挖对桩群的影响,以城市快速路高架桥下的软土土层河道开挖为研究对象,采用Midas/GTS NX开展了三维数值模拟研究,河道中间桥梁群桩采用袖阀管注浆及钢板桩加固方法,河道两侧桥梁群桩采用高压旋喷桩加固措施,加固完成后再进行河道开挖工作。研究发现:在袖阀管注浆及钢板桩加固后河道中间桥梁群桩水平位移与弯矩均偏向河道开挖方向,轴力较小;在高压旋喷桩加固后右侧桥梁群桩水平位移几乎为零,轴力较大,而最终桥梁群桩均呈现出一定的竖直位移,但位移值在规范允许范围内。
In order to study the influence of river excavation on pile group,Midas/GTS NX was used to carry out three-dimensional numerical simulation study on the soft soil layer under the viaduct of urban expressway.Sleeve valve tube grouting and steel sheet pile reinforcement were used for bridges group piles in the middle of the river channel,and the high-pressure jet grouting pile was used for the reinforcement of bridge group piles on both sides of the river.After the reinforcement,the river channel excavation was carried out.The results show that:after the sleeve valve pipe grouting and steel sheet pile reinforcement,the horizontal displacement and bending moment of the bridge group pile group in the middle of the river channel are inclined to the river excavation direction,and the axial force is small;after the high-pressure jet grouting pile reinforcement,the horizontal displacement of the right side of the bridge group pile group is almost zero,and the axial force is large,and the final bridge pile group shows a certain vertical displacement,which is within the allowable range of the code.
作者
钟悦鹏
彭孝旺
熊山铭
ZHONG Yue-peng;PENG Xiao-wang;XIONG Shan-ming(Jiangxi Gannan Highway Survey and Design Institute,Ganzhou 341008,Jiangxi,China;Ganzhou Transportation Holding Group Co.,Ltd.,Ganzhou 341008,Jiangxi,China)
出处
《筑路机械与施工机械化》
2020年第11期57-60,共4页
Road Machinery & Construction Mechanization
关键词
桥梁工程
三位数值模拟
河道开挖
桩群位移
bridge engineering
three digit numerical simulation
river excavation
pile group displacement
