摘要
为分析浅埋隧道CD法施工对既有高压铁塔的影响,以九景衢铁路某隧道工程为背景,建立二维弹塑性有限元模型,对有无注浆加固两种方案进行模拟,对比分析了高压铁塔水平及竖向位移,隧道周边收敛变化规律。结果表明,地表注浆加固后采用CD法可明显控制高压铁塔的基础沉降和不均匀沉降,其中基础沉降值减少了43.63%,不均匀沉降值减少了54.39%;在隧道上部的施工过程中,铁塔和隧道的沉降位移和沉降速率较大;数值模拟结果与实测值较为接近,加固后能够保证隧道和铁塔的安全。研究结果可为类似工程提供一定的参考。
In order to analyze the influence of the shallow tunnel constructed by CD method on the existing high voltage tower,taking a tunnel project on the Jiujiang-Jingdezhen-Quzhou Railway as the background to establish two-dimensional elastic-plastic finite element model and to simulate two kinds of grouting reinforcement schemes.The horizontal and vertical displacements of the high voltage tower and the variation law of tunnel peripheral convergence are compared and analyzed.The results show that using the CD undermining method can obviously control the vertical displacement and the uneven settlement of the high-voltage tower,among which,the foundation settlement decreases by 43.63% and the value of uneven settlement decreased by 54.39%.During the construction of the upper part of the tunnel,the sedimentation and settlement rates of the tower and tunnel are larger.The numerical simulation results are close to the measured values.After reinforcement,it can ensure the safety of the tunnel and the tower.The results can provide reference for similar projects.
出处
《公路》
北大核心
2018年第3期247-252,共6页
Highway
基金
中央高校基本科研业务费专项资金资助项目,项目编号310821165011
310821153312
310821172004
关键词
隧道施工
高压铁塔
数值分析
沉降
加固方案
分析
tunnel construction
high-- voltage tower
numerical analysis
settlement
reinforcement scheme
analysis
