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Field Measurement of Stresses of Floor Slabs in Excavations

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Abstract

This paper presents field measurement of stresses of floor slabs in excavations. During the study, a typical measurement-section was selected, and concrete strain meters were embedded so as to make stress measurement for floor slabs. Effect of the excavation of adjacent foundation pit for existing structure was discussed deeply. What’s more, the stability of floor slabs was evaluated. Finally, it could be concluded as follows: With the increase of the excavation depth, the excavation of the Transfer Hall Foundation Pit (THFP) had large effect on the internal force of floor slabs beside it, however, such influence tended to be smaller for the foundation pit far from the Transfer Hall (TH);. According to the strain data from field measurement, safety factors of floor slabs were calculated, which turned out to meet national code (JGJ 120-2012). Meanwhile, it can be concluded that floor slabs were in the safe status. In the end, the variation relation of their internal force, which would provide some references for the design and construction of similar projects in future, was obtained.

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Acknowledgements

This work was financially supported by Project (2012-19) of Technology Development Program of China Railway Group Limited, and the Projects (51378505, 50808178) of the National Science Foundation of China.

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, China

    Jiang Chen, Junsheng Yang, Xuemin Zhang & Xuefeng Ou

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  1. Jiang Chen
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  2. Junsheng Yang
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  3. Xuemin Zhang
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  4. Xuefeng Ou
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Correspondence to Jiang Chen.

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Chen, J., Yang, J., Zhang, X. et al. Field Measurement of Stresses of Floor Slabs in Excavations. Geotech Geol Eng 35, 915–929 (2017). https://doi.org/10.1007/s10706-016-0150-3

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  • DOI: https://doi.org/10.1007/s10706-016-0150-3

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