Numerical study of effectiveness of horizontal grouting in liquefaction mitigation for existing building foundation
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As a method of ground reinforcement to prevent liquefaction, various construction methods have been applied. A method to stabilize the ground using a fixative or stabilizer is the most useful method for the reinforcement of construction against liquefaction for lower levels of existing structures. However, the vertical or inclined grouting that is generally applied to construction sites has drawbacks in efficiency and reinforcement range as well as drilling problems at the bottom of existing structures. To overcome these drawbacks, some equipment and reinforcement methods that can conduct grouting after digging underneath of existing structures in the horizontal direction have been developed. As a foundational study to develop the above technology, this study conducted a dynamic finite differential analysis (FLAC 2D) to compare and review the effects of liquefaction reinforcement methods using the grouting method. As the analysis results, the horizontal grouting method is considered more effective to reduce liquefaction occurrence than applying the slope and vertical reinforcement conditions.
Keywordsreinforcement liquefaction horizontal grouting dynamic numerical analysis displacement
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This research was supported by a grant from the project entitled, “Development of liquefaction damage prediction visualization system and liquefaction reinforcement method with high efficiency and low cost”, which was funded by Korea Institute of Civil Engineering and Building Technology (KICT).
- Bathe, M. and Wilson, E. (1976). Numerical methods in finite element analysis. Englewood Cliffs, New Jersey: Prentice-Hall Inc.Google Scholar
- Byrne, P. (1991). A cyclic shear-volume coupling and pore-pressure model for sand. Proc. 2nd Int. Conf. on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, March, St. Louis, Missouri, Paper No. 1.24, pp 47-55.Google Scholar
- Ishii, H. Higaki, K., Kawai, S., Miwa, S., Koizumi, R. and Oyama T. (2008). Development of permeant soil improvement system suitable for horizontal directional drilling. Journal of the Society of Materials Science, Japan, 57(1), pp 272-282.Google Scholar
- Ishii, H., Funagara, H., Matsui, H. and Horikoshi, K. (2011). Effectiveness of liquefaction countermeasures in the 2011 M = 9 gigantic earthquake, and an innovative soil improvement method, Indian Geotechnical Journal, 43(2), pp 153-160.Google Scholar
- Madabhushi, G. (2007). Ground improvement methods for liquefaction remediation. Proc. of the Institution of Civil Engineers Ground Improvement, ICE, 11(4), pp 195-206.Google Scholar
- Martin, G., Finn W. and Seed, H. (1975). Fundamentals of liquefaction under cyclic loading. J. Geotech., Div. ASCE, 101(GT5), pp 423-438.Google Scholar
- Ministry of the Interior and Safety (2017). The standards proposed by the common requirements for seismic design codes.Google Scholar
- Pitilakis, K., Riga, E., Makra, K., Gelagoti, F., Ktenidou, O-J., Anastasiadis, A., Pitilakis, D. and Izquierdo Flores, C.A. (2014). Deliverable D11.5 Code cross-check, computed models and list of available results - AUTH contribution, Network of European Research Infrastructures for Earthquake Risk Assessment and Mitigation (NERA), Seventh Framework Programme, EC project number: 262330.Google Scholar
- Rasouli, R., Hayashi, K., Morihashi, M. and Zen, K. (2015). Application of permeation grouting method as a countermeasure against liquefaction damages to airport runways in operation. The 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, November, Fukuoka, Japan.Google Scholar
- Rasouli, R., Hayashi, K., and Zen K. (2016). Controlled permeation grouting method for mitigation of liquefaction. J. Geotech. Geoenviron. Eng, ASCE, 142(11):04016052.Google Scholar
- Wansbone, M. and Ballegooy, S. (2015). Horizontal soil mixed beam ground improvement as a liquefaction mitigation method beneath existing houses. 6th Int. Conf. on Earthquake Geotech. Engng., November, Christchurch, New Zealand.Google Scholar