Deformation Control for Foundation Pit Segmented Construction Adjacent to Operational High-speed Railway Lines
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 8
Abstract
Objective Limited land use resource and arrangement adjacent to operational high-speed railway lines pose significant challenges to some city foundation pit constructions and the railway operational safety. To reasonably predict and control the foundation pit and adjacent high-speed railway subgrade deformations, it is necessary to conduct deformation control studies on foundation pit construction. Method Based on an open-cut foundation pit near a high-speed railway subgrade in Shanghai, Plaxis 3D software is used to analyze the impact of different foundation pit segmented construction lengths on the enclosure structure and adjacent high-speed railway subgrade, and the deformation control effectiveness of segmented construction on foundation pit itself and adjacent high-speed railway subgrade is analyzed according to field-measured data. Result & Conclusion Segmented construction can effectively reduce the deformation of both the foundation pit enclosure structure and the existing high-speed railway subgrade. The shorter the segmented length is, the smaller the deformation of foundation pit and existing high-speed railway subgrade, and the more evident inhibition corner effect formed by foundation pit segmentation walls has on enclosure structure deformation. Based on field measurement data, with a segmented length of 30 m, both of the foundation pit enclosure structure deformation and the high-speed railway subgrade vertical deformation remain in standard limits; however, the subgrade horizontal deformation exceeds the limit requirements.
Authors and Affiliations
Xiaolong LI, Weilian LIAO, Fei XIAO, He CHEN, Honggui DI, Shuqi HE
Keywords
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- EP ID EP742709
- DOI 10.16037/j.1007-869x.2024.08.038
- Views 35
- Downloads 0
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