Abstract:The municipal project of Qianhai Tinghai Avenue in Shenzhen city belongs to the newly added municipal road after the adjustment planning of Qianhai Free Trade Zone. After the road planning adjustment, the overall elevation of the floor is raised by about 5.0 m, which exceeds the original design load of the new interval tunnel in front of Metro Line 1 in the site. The construction of the road will have a huge impact on the structure of the subway tunnel. The application of bubble mixed light soil in this project avoids the impact of roadbed rolling construction on the subway tunnels, which effectively solves the overload exceeding limit and operation safety problems of Metro Line 1, and ensures the safety and stability of the roadbed of Tinghai Avenue. Taking its design and construction processes as the example, and combined with the deformation monitoring of this metro, the using effect is analyzed. The feasibility and effectiveness of using the bubble mixed light soil to fill the subgrade above the current subway tunnel are discussed in detail.
