顶管通道近接施工对有轨电车的影响及优化分析

Influence of Pipe Jacking on the Adjacent Tram Lines

针对顶管通道近接苏州有轨电车1号线施工工程,采用修正莫尔-库伦模型,模拟顶管井基坑的开挖和顶管推进的实际施工步骤,并根据计算结果提出了针对性工程优化措施。通过对顶管井基坑开挖和顶管掘进过程的动态模拟,分析得到整个施工阶段中临近有轨电车道床最大沉降量和水平位移小于苏州市有轨电车暂行保护标准的要求。有限元计算为顶管施工方案可行性提供理论依据,可为类似项目提供参考。

The construction of a pipe jacking project that adjacent to the existing Tram Line No.1 in Suzhou under operation was numerically simulated.The launching jacking pit excavation and the pipe jacking process were simulated by using the modified Mohr-Coulomb constitutive model.The construction sequence was therefore optimized from the numerical analysis results.From the numerical analysis results of the pipe jacking,it is concluded that both the maximum vertical and lateral movement at the existing tram line met the code allowable values.