对无砟轨道线下工程沉降评估的几点认识

铁路无砟轨道线下工程沉降评估是无砟轨道铺设前的关键工序之一,本文通过采用Asaoka法、三点法、双曲线法对某隧道线下工程沉降观测数据进行拟合,并预计工后沉降,分析对比了三种预计方法的相关系数、预计精度及预计工后沉降量,并对三种方法预计效果进行了原因分析,提出了通过增加前期沉降期监测频率、控制测量误差来提高沉降预计效果的措施。

Cognition on Settlement Evaluation for Ballastless Track Underline Engineering

Settlement evaluation for ballastless track is one of the key processes before non-ballasted track laying. By using Asaoka method, three-point method and hyperbola method, this paper fitted the sedimentation observations of a tunnel and predicted the post-construction settlement. It also compared the correlation coefficient, predicting accuracy and post-construction settlement of the three methods and analyzed the different reasons of the results produced by the three methods. Then it proposed the measures to improve the predicting effects of sedimentation by increasing the monitoring frequency of sedimentation period and controlling the measuring error.