Abstract
A 1 g shaking table test of a shallow segmental mini-tunnel in sand is performed to investigate its dynamic responses. The properties of sand, the materials and design of the segmental tunnel, the construction process of testing models and the instrumentation scheme are introduced in full detail. Two levels of intensity and three typical central frequencies of idealized Ricker wavelets, making six cases of excitations, are applied to both the free-field model and the soil-tunnel model. Two white noise cases before and after the design-level cases are also performed to verify the dynamic characteristics of the models. Comprehensive results, including the acceleration responses of the two models, deformations at radial joints and in the diametral directions of the tunnel, bolt tensions between segments as well as strains of segments, are presented. The minutiae of the test are clarified to reduce uncertainties, and experimental results are carefully verified. It could be a benchmark test of segmental tunnels in dry sand ground by means of 1 g shaking table.
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Acknowledgements
The research has been supported by the National Key Research and Development Plan of China (2018YFC0809600, 2018YFC0809602 and 2017YFC1500703), the National Natural Science Foundation of China (41922059, 51678438 and 51778487) and the China Scholarship Council (201806260218).
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Yuan, Y., Yang, Y., Zhang, S. et al. A benchmark 1 g shaking table test of shallow segmental mini-tunnel in sand. Bull Earthquake Eng 18, 5383–5412 (2020). https://doi.org/10.1007/s10518-020-00909-w
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DOI: https://doi.org/10.1007/s10518-020-00909-w