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Abstract: In the eastern coastal region of China, many operating highways built over soft ground are vulnerable to severe post-construction settlement. In this study, a technique using jet grouted piles is developed to mitigate post-construction settlement. The piles are installed by drilling boreholes throughout the embankment. The principal stages of the construction process are described, and two field tests in China, on the Lianyan and Linhai highways, are presented. The results revealed that ground heaves of up to 219 mm and 337 mm induced during a short construction period were able to mitigate the settlement of the embankment. The average settling rate was significantly reduced from 60 mm/y to 9 mm/y on the Lianyan highway. Lateral ground displacement on the Linhai highway increased with time during construction, but after construction showed a slight reduction associated with the dissipation of excess pore water pressure. An analytical method was adopted to describe the ground heave due to the jet grouted piles. The ground heave increased with grout pump pressure, but decreased as the embankment load and distance from the pile center increased.

The authors present a very interesting and detailed study of an interesting problem.

既有高速公路沉降处治技术现场试验研究

[1]ASTM (American Society for Testing and Materials), 2011. Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), ASTM Standard D2487. ASTM, West Conshohocken, PA, USA.

[2]Chang, S.B., Zhang, S.M., 2007. Manual of Engineering Geology. China Building Industry Press, Beijing, China, p.158-162 (in Chinese).

[3]Chu, J., Yan, S.W., Yang, H., 2000. Soil improvement by the vacuum preloading method for an oil storage station. Géotechnique, 50(6):625-632.

[4]Deng, Y.F., Yue, X.B., Cui, Y.J., et al., 2014. Effect of pore water chemistry on the hydro-mechanical behaviour of Lianyungang soft marine clay. Applied Clay Science, 95:167-175.

[5]Flora, A., Modoni, G., Lirer, S., et al., 2013. The diameter of single, double and triple fluid jet grouting columns: prediction method and field trial results. Géotechnique, 63(11):934-945.

[6]Hanna, A.M., Yulek, M., 2014. Impact compaction on a subgrade layer overlying deep deposit. International Journal of Pavement Engineering, 15(8):742-751.

[7]Liu, H.L., Kong, G.Q., Chu, J., et al., 2015. Grouted gravel column-supported highway embankment over soft clay: case study. Canadian Geotechnical Journal, 52(11):1725-1733.

[8]Mayne, P.W., Jones, J.S.Jr., Dumas, J.C., 1984. Ground response to dynamic compaction. Journal of Geotechnical Engineering, 110(6):757-774.

[9]Modoni, G., Bzówka, J., 2012. Analysis of foundations reinforced with jet grouting. Journal of Geotechnical and Geoenvironmental Engineering, 138(12):1442-1454.

[10]Poh, T.Y., Wong, I.H., 2001. A field trial of jet-grouting in marine clay. Canadian Geotechnical Journal, 38(2):338-348.

[11]Poulos, H.G., 2007. Design charts for piles supporting embankments on soft clay. Journal of Geotechnical and Geoenvironmental Engineering, 133(5):493-501.

[12]Poulos, H.G., Davis, E.H., 1980. Pile Foundation Analysis and Design. Wiley, New York, USA.

[13]Saowapakpiboon, J., Bergado, D.T., Voottipruex, P., et al., 2011. PVD improvement combined with surcharge and vacuum preloading including simulations. Geotextiles and Geomembranes, 29(1):74-82.

[14]Schaefer, V.R., Mitchell, J.K., Berg, R.R., et al., 2012. Ground improvement in the 21st century: a comprehensive web-based information system. Geotechnical Engineering State of the Art and Practice: Keynote Lectures from GeoCongress 2012, Oakland, California, USA. American Society of Civil Engineers (ASCE), USA, p.272-293.

[15]Shahu, J.T., Reddy, Y.R., 2011. Clayey soil reinforced with stone column group: model tests and analyses. Journal of Geotechnical and Geoenvironmental Engineering, 137(12):1265-1274.

[16]van Paassen, L.A., Ghose, R., van der Linden, T.J.M., et al., 2010. Quantifying biomediated ground improvement by ureolysis: large-scale biogrout experiment. Journal of Geotechnical and Geoenvironmental Engineering, 136(12):1721-1728.

[17]Wang, Z.F., Shen, S.L., Ho, C.E., et al., 2013. Investigation of field-installation effects of horizontal twin-jet grouting in Shanghai soft soil deposits. Canadian Geotechnical Journal, 50(3):288-297.

[18]Weng, C.X., 2006. Study on a Subway Shield Tunnel under the Excess Pore Pressure by High-pressure Jet Grouting. MS Thesis, Tongji University, Shanghai, China (in Chinese).

[19]Wong, I., Poh, T., 2000. Effects of jet grouting on adjacent ground and structures. Journal of Geotechnical and Geoenvironmental Engineering, 126(3):247-256.

[20]Wu, Y.D., Diao, H.G., Ng, C.C.W., et al., 2016. Investigation of ground heave due to jet grouting in soft clay. Journal of Performance of Constructed Facilities, 06016003.

[21]Ye, G.B., Zhang, Z., Han, J., et al., 2013. Performance evaluation of an embankment on soft soil improved by deep mixed columns and prefabricated vertical drains. Journal of Performance of Constructed Facilities, 27(5):614-623.

[22]Yoshitake, I., Nakagawa, K., Mitsui, T., et al., 2004. An evaluation method of ground improvement by jet grouting. Tunnelling and Underground Space Technology, 19(4-5):496-497.

[23]Zhou, W.H., Chen, R.P., Zhao, L.S., et al., 2012. A semi-analytical method for the analysis of pile-supported embankments. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 13(11):888-894.