摘要
新建高铁路基临近既有高铁路基且填方较高时,为保证既有无砟轨道的变形要求,同时也为了节省土地,新建高铁采用侧墙式桩板结构的地基处理形式,侧墙最近一排钻孔桩至侧墙边缘的距离是筏板配筋的控制性因素。通过建立不同桩基间距的有限元三维模型进行数值模拟,进而验证既有高铁路基的变形和桩板结构配筋的合理性。最终得出,桩基分布对既有线变形基本无影响,但对板内钢筋的受力影响较大,最外侧桩基至侧墙边缘距离以1.3m为宜。
When the new high railway foundation is close to the existing high railway foundation and the filling is high,in order to ensure the deformation requirements of the existing ballastless track and save land,the foundation treatment form of side wall pile plate structure is adopted in the new high railway.The distance between the nearest row of bored piles and the edge of the side wall is a controlling factor of raft reinforcement.The finite element three-dimensional model with different pile foundation spacing is established to simulate the deformation of the existing high railway foundation and the rationality of pile and plate structure reinforcement.It is concluded that the pile foundation distribution has no effect on the deformation of the existing cable,but has a great effect on the stress of the reinforcement in the plate.The distance between the lateral pile foundation and the edge of the side wall should be 1.3m.
作者
冀少峰
JI Shao-feng(China Railway Shanghai Design Institute Group Co.,Ltd.,Shanghai 200070,China)
出处
《价值工程》
2023年第8期61-63,共3页
Value Engineering
关键词
侧墙
桩板结构
桩间距
路基
数值模拟
side wall
pile-plate structure
pile spacing
subgrade
numerical simulation
