盾构上方填方道路软基浅层处理方式研究

Study on Shallow Treatment Method of Soft Foundation of Fill Road above Shield

摘要:

针对地铁盾构区间上方荷载及变形控制要求，提出一种盾构上方填方道路软基浅层处理方案，结合该方案力学原理，推导出相关计算公式。为了进一步研究路基处理及施工引起的土体及盾构结构变形及受力特点，基于杭州地铁5号线上方施工某城市道路工程实例，对盾构上方道路软基处理及施工过程进行数值模拟分析，将分析结果同推导公式计算数据对比分析，验证了计算方法的正确性，研究成果可为类似工程设计提供参考。

Abstract:

According to upper load and deformation control requirements between the metro shields, a shallow treatment scheme of soft foundation for fill road above shield is proposed. Combined with the mechanics principle of the scheme, the relevant calculation formulas are derived. In order to further study the deformation and stress characteristics of soil and shield structure caused by the subgrade treatment and construction, based on the construction of an urban road project above Hangzhou Metro Line 5, the soft foundation treatment and construction process of the road above shield are analyzed by numerical simulation. The analysis results are compared with the calculated data derived from the formula. The correctness of the calculation method is verified. The research results can provide reference for the design of similar projects.