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Zhang Y.-C.,Wuhan University | Zhang Y.-C.,Guangdong Research Institute of Resources and Hydropower | Zhang Y.-C.,China Construction Third Engineering Bureau Co. | Yang G.-H.,Wuhan University | And 6 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

The foundation pit of Haizhu Square in Guangzhou is located above the metro tunnel. The minimum distance between the bottom of foundation pit and tunnel top is just 5 m. The key of the foundation pit project is know how the excavation of the foundation pit affect the metro tunnel. A numerical model for the foundation pit project is established. The results show that the excavation below the soil surface has a significant role in the unloading along the vertical direction, and it inevitably leads to occurrence of soil deformation at the bottom of the pit, causing the tunnel displacement. The stress state of the tunnel segment also changes. The results provide valuable reference to the project design and construction. It is helpful to other similar projects. Source

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