AI Chat Paper
Discover the SciOpen Platform and Achieve Your Research Goals with Ease.
Search articles, authors, keywords, DOl and etc.
{{expandStatus?'Exit ':''}}Advanced Search
This study purposes to study the influence of artificial freezing on the liquefaction characteristics of Nanjing sand, as well as its mechanism.
was studied through dynamic triaxial tests by means of the GDS dynamic triaxial system on Nanjing sand extensively discovered in the middle and lower reaches of the Yangtze River under seismic load and metro train vibration load, respectively, and potential hazards of the two loads to the freezing construction of Nanjing sand were also identified in the tests.
The results show that under both seismic load and metro train vibration load, freeze-thaw cycles will significantly reduce the stiffness and liquefaction resistance of Nanjing sand, especially in the first freeze-thaw cycle; the more freeze-thaw cycles, the worse structural behaviors of silty-fine sand, and the easier to liquefy; freeze-thaw cycles will increase the sensitivity of Nanjing sand’s dynamic pore pressure to dynamic load response; the lower the freezing temperature and the effective confining pressure, the worse the liquefaction resistance of Nanjing sand after freeze-thaw cycles; compared to the metro train vibration load, the seismic load in Nanjing is potentially less dangerous to freezing construction of Nanjing sand.
The research results are helpful to the construction of the artificial ground freezing of the subway crossing passage in the lower reaches of the Yangtze River and to ensure the construction safety of the subway tunnel and its crossing passage.
Chen, W., Sun, M., Liu, M., Hu, X., & Zeng, G. (2003). Characters of schistose structure of nanjing’s sand and seismic liquefaction of subsoil of a metro section. Rock and Soil Mechanics, 24(5), 755–758, (in Chinese).
Cheng, P., Wang, Y., & Li, X. (2016). Factors and homogeneity of triaxial sand specimens preparation with air pluviation. Journal of Yangtze River Scientific Research Institute, 33(10), 79–83, 92 (in Chinese).
He, F., Wang, X., Liu, D., Jiang, D., & Liu, B. (2017). Experimental study on dynamic characteristic parameters of undisturbed frozen sandy soil of qinghai-tibet Railway. Journal of the China Railway Society, 39(6), 112–117, (in Chinese).
Hu, Z., Wang, R., Zhuang, H., & Chen, G. (2016). Apparent kinetic viscosity of saturated nanjing sand due to liquefaction-induced large deformation in torsional shear tests. Chinese Journal of Geotechnical Engineering, 38(Supplement 2), 149–154, (in Chinese).
Huang, Y. (2001). Liquefaction of the nanjing sand and its identification. World Information on Earthquake Engineering, 17(1), 69–74, (in Chinese).
Johnson, T. C., Cole, D. M., & Chamberlain, E. J. (1979). Effect of freeze-thaw cycles on resilient properties of fine-grained soils. Engineering Geology, 13(1/2/3/4), 247–276.
Lagioia, R., Sanzeni, A., & Colleselli, F. (2006). Air, water and vacuum pluviation of sand specimens for the triaxial apparatus. Soils and Foundations, 46(1), 61–67.
Li, J. C., Baladi, G. Y., & Andersland, O. B. (1979). Cyclic triaxial tests on frozen sand. Engineering Geology, 13(1/2/3/4), 233–246.
Ma, W., Chen, G., Li, L. E., Wu, Q., & Liu, J. (2019). Experimental study on liquefaction characteristics of saturated coral sand in nansha islands under cyclic loading. Chinese Journal of Geotechnical Engineering, 41(5), 981–988, (in Chinese).
Mei, Y., Zhao, L., Zhou, D., Liu, J., & Zhu, J. (2020). Application of AGF in underground excavation construction of water-rich sand layer. China Railway Science, 41(4), 1–10, (in Chinese).
Sun, J., Gong, M., Xiong, H., & Gan, L. (2020). Experimental study of the effect of freeze-thaw cycles on dynamic characteristics of silty sand. Rock and Soil Mechanics, 41(3), 747–754, (in Chinese).
Tang, Y., Li, J., & Li, J. (2019). Experimental study on dynamic cumulative axial strain performance of artificial frost-thawed saturated silty sand. Journal of Harbin Institute of Technology, 51(2), 76–83, (in Chinese).
Wang, J., Wang, L., & Li, L. (2004). The dynamic triaxial test discrimination and evaluation for liquefaction of saturated sand. Northwestern Seismological Journal, 26(3), 285–288, (in Chinese).
Wang, P., Xu, J., Liu, S., Wang, H., & Liu, S. (2016). Static and dynamic mechanical properties of sedimentary rock after freeze-thaw or thermal shock weathering. Engineering Geology, 210, 148–157.
Wang, T., Wang, H., Song, H., Wang, O., & Liu, J. (2019). Evolution laws of mechanical properties of artificially frozen silty clay. China Railway Science, 40(1), 1–7, (in Chinese).
Yan, H., Wang, T., Liu, J., & Wang, Y. (2014). Experimental study of dynamic parameters of silty soil subjected to repeated freeze-thaw. Rock and Soil Mechanics, 35(3), 683–688, (in Chinese).
Zhang, Y. (2016). Analysis of measured vibration wave on the top of subway tunnel. Journal of Engineering Technology, 3, 286, (in Chinese).
This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to full attribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode
京公网安备11010802044758号