地铁暗挖区间下穿排水管线动态设计与施工

Dynamic Design and Construction of the Buried Excavated Tunnels of Metro Underneath the Drainage Pipeline

地铁暗挖区间施工过程中常遇到既有给、排水管线,土体开挖是应力释放的过程,开挖前需采取有效的超前加固措施,避免既有管线结构发生受拉破坏,如产生渗水或涌水等情况,则会危及暗挖区间及周边构筑物的安全。基于沈阳地铁10号线淮河街站~百鸟公园站暗挖区间的管线渗漏水现象,从动态设计及处理措施选择等方面对该风险点进行了研究,可为类似地层的相似工程问题设计或处理提供参考。

During the construction of buried excavation o fmetro tunnels, existing drainage pipelines often located adjacent to the tunnels. Soil excavation is a process of stress release. Thus, effective pre-support measurements need to be installed before excavation to avoid tension failure in existing pipeline, which can cause water seepage or surge. The safety of metro tunnel and existing buildings will be influenced. In this paper, based on the pipeline leakage of metro tunnel from Huaihe Station to Bainiao park Station of Shenyang metro line 10, the dynamic design and treatment measurements for risk points were studied. The results can provide good guidance for the similar engineering problems in design and construction.