近距离三线并行盾构隧道施工实测分析

In-situ Monitoring and Analyzing on Construction of Three Closely Spaced Parallel Pipe Shield Tunnels

针对上海某地铁近距离三线并行盾构区间隧道的施工影响进行现场监测分析研究。总结归纳盾构施工对周围深层土体水平位移、深层土体沉降、孔隙水压力的基本影响规律。根据已建隧道的位移、沉降历时曲线和收敛特性,得出了盾构推进对近距离并行已建隧道的施工影响特点。研究结果可为后续类似工程的设计与施工积累经验。

Based on the transit rail project construction in Shanghai, the in-situ monitoring data of three closely spaced parallel pipe shield tunnels are studied for their interaction during construction. The horizontal displacement and layered settlement of deep soil and excess pore water pressure caused by the construction is analyzed, then, the essential rules of soil disturbance are deduced and summarized. By analyzing the lateral displacement, vertical settle- ment of built tunnels and convergence deformation characteristics, the characters of construction interaction between closely spaced parallel shield tunnels are brought forward. The result of the study offers an experience for design and construction of other similar project in the future.