高速铁路桩网结构路基抗震性能分析

Analysis of seismic performance of subgrade ofpile network structure of high-speed railway

通过使用有限元分析软件建立了一个高速铁路路基的足尺寸模型,以研究桩网结构对路基抗震性能的影响。研究主要考察了桩长、桩径、桩间距以及褥垫层厚度四个因素对高速铁路路基抗震性能的影响规律。通过对路基边坡的时域分析以及减震率的评估,得到以下结论:增加桩长、桩径和褥垫层厚度对提升抗震性能有明显效果;桩间距的增加会导致减震效果降低。该研究为高速铁路路基的抗震设计提供了有力的支持。

A full-scale model of the high-speed railway subgrade was established by using finite element analysis software to study the influence of pile network structure on the seismic performance of the subgrade.The influence of four factors,pile length,pile diameter,pile spacing and cushion thickness on the seismic performance of high-speed railway subgrade was investigated.Through the time domain analysis of the subgrade slope and the evaluation of the damping rate,the following conclusions are obtained:increasing the pile length,pile diameter and cushion thickness have obvious effects on improving the seismic performance;An increase in pile spacing leads to a decrease in damping effect.In turn,it provides strong support for the seismic design of high-speed railway subgrade.