盾构隧道施工对高铁路基的沉降变形影响研究

Influence of Shield Tunnel Construction on Settlement Deformation of High Railway Foundation

为了保证高铁路基工程的施工安全,文中利用数值模拟手段分析了盾构隧道施工参数掌子面压力、注浆压力以及注浆材料模量对高铁路基的沉降量的影响。结果表明,U型槽的沉降量随着横向距离的增加表现为先增加后降低的变化规律,整个曲线范围内存在两个显著的峰值点;纵向地表沉降量随着纵向距离的增加表现为先降低再稳定后增加的变化规律;随着掌子面压力、注浆压力以及注浆材料模量的增加,U型槽的沉降量不断降低,纵向地表沉降量不断下降。

In order to ensure the construction safety of high railway foundation project,this paper uses numerical simulation to simulate and analyze the influence of shield tunnel construction parameters,the pressure of the face,the grouting pressure and the grouting material modulus on the settlement of high railway foundation.The results show that the settlement of U-shaped groove increases first and then decreases with the increase of transverse distance,and there are two significant peak points in the whole curve range.With the increase of longitudinal distance,the longitudinal surface settlement decreases first and then stabilizes and then increases.With the increase of palm surface pressure,grouting pressure and grouting material modulus,the settlement amount of U-shaped groove decreases continuously,and the longitudinal surface settlement amount decreases continuously.