某隧道下穿石津灌区小运河施工复杂效应研究

Research on complex effect of a small tunnel construction crossing Shijin Irrigation District

石热—桃园电力隧道采用顶管顶进方式下穿石津灌区小运河。为探究电力隧道顶管顶进施工过程对石津灌区小运河的影响,本文采用FLAC^(3D)软件模拟石热—桃园电力隧道下穿石津灌区小运河工程,地层附加荷载采用泰沙基公式进行计算。结果表明,在隧道顶管顶进施工过程中引起的最大地层沉降位于石津灌区小运河左内坡脚处,其沉降数量为2.5 mm;电力隧道顶管顶进施工过程对石津灌区小运河的正常输水、灌溉等基本无影响。本文研究成果可为新建管廊、隧道、箱涵及管道下穿既有河渠等工程提供一定的借鉴与参考。

ShiRe-Taoyuan electric power tunnel passes through Shijin small canal by means of pipe jacking.In order to explore the influence of power tunnel jacking on the construction period of Shijin Irrigation District,FLAC^(3D)software is adopted to simulate small canal project of ShiRe-Taoyuan power tunnel crossing Shijin Irrigation District,and the additional load of the stratum is calculated using the Taishaji formula.The results show that,during the construction of tunnel pipe jacking,the largest stratum subsidence is located at the foot of the left inner slope of the small canal in Shijin Irrigation District,and the settlement value is 2.5 mm.The pipe jacking construction process of the power tunnel has basically no impact on the normal water delivery and irrigation of the small canal in Shijin Irrigation District.The research results can be used for references for such similar projects as new pipe corridors,tunnels,box culverts and pipelines crossing existing river canals and other projects.