盾构近距离下穿输水管线控制措施研究

Study on Control Measures for Shield Undercrossing Water Conveying Pipeline at Short Range

随着城市轨道建设的蓬勃发展,地铁区间施工时面临的下穿工程越来越复杂,尤其是近距离下穿大直径输水、排水管线,不仅要保证施工时地铁区间和管线的安全,更要保证地铁运营后两者的安全。因此,盾构开挖对既有管线的影响分析至关重要。结合沈阳市地铁某出入线工程,采用有限元软件MIDAS GTS模拟地铁盾构掘进对大直径输水管线的影响,通过现场监测结果对计算结果进行验证。经过对比分析后,验证了所采取的措施是合理可靠的,为今后盾构区间下穿输水管线提供了有益的参考。

With the rapid development of urban rail construction,the undercrossing engineering in subway construction is becoming more and more complicated,especially undercrossing the large-diameter water conveying pipeline and drainage pipeline at short range.It is necessary to ensure not only the safety of subway interval and pipeline during construction,but also the safety of both after subway operation.Therefore,it is very important to analyze the impact of shield tunneling on the existing pipelines.Combined with an in-out line project of subway in Shenyang,the finite element software MIDAS GTS is used to simulate the influence of subway shield tunneling on the large-diameter water conveying pipeline.The calculation result is verified by the field monitoring result.After comparison and analysis,it is verified that all taken measures are reasonable and reliable,which provides a beneficial reference for undercrossing the water conveying pipelines during shield tunneling in the future.