临港水厂管线工程对大治河护岸的影响分析

Analysis on Impact of Lingang Waterworks Pipeline Project on Dazhi River Embankment

摘要:

上海临港水厂原水管线在穿越大治河护岸施工时，不可避免地引起地层土体应力释放及重新分布，顶管和基坑施工必然影响到大治河护岸的安全。从保护大治河护岸安全的角度出发，采用有限元分析法，深入开展理论分析，研究基坑施工、顶管施工、围堰施工等工况下论证施工对大治河护岸安全的影响，并提出减少影响的相关建议，为保障大治河护岸的结构安全提供有效支撑。文章研究表明工作井基坑施工引起大治河护岸变形在允许的范围内，对现状结构的影响较小。

Abstract:

The raw water pipeline of Shanghai Lingang Waterworks inevitably causes the stress relief and redistribution of stratum soil mass in the construction of crossing the embankment of Dazhi River. The pipe jacking and foundation pit construction will inevitably affect the safety of Dazhi River embankment. From the perspective of view of protecting the embankment safety of Dazhi River, the finite element analysis method is used to carry out the in-depth theoretical analysis, study and demonstrate the impact of construction on the embankment safety of Dazhi River under the conditions of foundation pit construction, pipe jacking construction and cofferdam construction, and put forward the relevant suggestions for reducing the impact in order to provide the effective support for ensuring the structural safety of Dazhi River embankment. The research shows that the deformation of Dazhi River embankment caused by the foundation pit construction of manhole is within the allowable range and has little influence on the current structure.