地铁隧道上方气泡轻质土填筑施工技术研究

Study on Construction Technology of Bubble Light Soil Filling above Subway Tunnel

本文引用的工程项目为深圳市前海听海大道市政工程,属于前海自贸区调整规划后新增的市政道路。由于道路规划调整后地坪高程整体抬高了约5.0 m,超过了场地内地铁1号线前新区间隧道原设计荷载,道路的建设将对地铁隧道结构产生巨大的影响。气泡混合轻质土在该工程中的应用避免了路基碾压施工对地铁隧道的影响,有效解决了地铁1号线荷载超限及运营安全问题,并保障了听海大道道路路基的安全稳定。本文列举其设计和施工过程,并结合地铁的变形监测分析其使用效果,详细论述现状地铁隧道上方应用气泡混合轻质土填筑路基的可行性和有效性。

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.