Abstract
In this paper, monitoring results of Bohai Bank deep foundation pit in Tianjin has been summarized and analyzed. The characters of ground settlement caused by excavation and lateral movement of the bracing have been analyzed. The temporal and spatial variation rules of deformation pit have been studied. Making use of related work of the soil loss theory, the ground settlement has been calculated inversely. The study shows that: the pit foundation deformation rule of this project is similar to the rules in Shanghai soft soil area. Spatial effect is obvious in pit deformation process. The deformation of the pit is sensitive to depth and stage of excavation. In the position where has the maximum lateral movement, the ratio of the horizontal distance to the depth of excavation is 0.85. The settlement values calculated by soil loss theory are larger than measured values. The quickly changing of the settlement caused by excavation does not happen at the same time as the deformation of bracing. The main factor that affects the settlement may be the addition load caused by surroundings, while deformation of bracing is affected by active earth pressure on bracing.
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Acknowledgments
The work presented in this paper was supported by the National Key Technologies R&D Program of China (Grant No. 2012BAJ11B04) and Shanghai Leading Academic Discipline Project, Project Number: B308.
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Tang, Yq., Yan, Jj., Sun, Zj., Zhou, J. (2014). Measurement Analysis of Bohai Bank Deep Foundation Pit Project in Tianjin Soft Soil Area. In: Lollino, G., Manconi, A., Locat, J., Huang, Y., Canals Artigas, M. (eds) Engineering Geology for Society and Territory – Volume 4. Springer, Cham. https://doi.org/10.1007/978-3-319-08660-6_4
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DOI: https://doi.org/10.1007/978-3-319-08660-6_4
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