摘要
为明确桩板结构路基在不同工况下的受力与变形特性,文章采用PFC2D软件构建数值模型,分析其轴力、弯矩与沉降演化规律。研究结果表明,桩轴力随深度的增加,呈现先增大后减小的非线性分布特征,峰值出现在距桩底约1/3处,弯矩最大值位于距中线2~3 m处;路基沉降沿横断面呈曲线分布,路基边缘沉降较小,路基中心沉降最大,最大沉降值为8.8 mm,满足规范限值要求。研究结果可为桩板结构路基设计与施工提供参考,提高软土区高铁路基的平顺性。
In order to clarify the force and deformation characteristics of pile-plate structure subgrade under different working conditions,this paper uses PFC2D software to build a numerical model to analyze the evolution law of axial force,bending moment and settlement.The research results show that the axial force of the pile increases first and then decreases with the increase of depth,exhibiting a nonlinear distribution characteristic,with the peak occurring at about 1/3 from the pile bottom,and the maximum bending moment is located at a distance of 2 to 3 meters from the centerline;the subgrade settlement is distributed in a curved pattern along the cross-section,the settlement at the edge of the subgrade is small,and the settlement at the center of the subgrade is the largest,with the maximum value of 8.8 mm,which meets the requirements of the specification limit.The research results can provide reference for the design and construction of pile-plate structure subgrade,and improve the smoothness of high-speed railway subgrade in soft soil areas.
作者
金琳涵
刘树强
王新亮
王硕
闫地
JIN Linhan;LIU Shuqiang;WANG Xinliang;WANG Shuo;YAN Di(Changchun High-Speed Railway Infrastructure Section of China Railway Shenyang Group Co.,Ltd.,Changchun 130051,Jilin,China;Beijing Tieke Yingmai Technology Co.,Ltd.,Beijing 100081,China;Engineering Department of China Railway Shenyang Group Co.,Ltd.,Shenyang 110000,Liaoning,China;Shijiazhuang Tiedao University Sifang College,Shijiazhuang 051133,Hebei,China)
出处
《工程技术研究》
2025年第15期25-27,共3页
Engineering and Technological Research
关键词
高速铁路
桩板结构
桩轴力
结构变形特性
路基沉降
high-speed railway
pile-plate structure
pile axial force
structural deformation characteristic
subgrade settlement
