Measures and Mechanism of Reinforcement of Soft Subgrade of High Speed Railway in Operation

Abstract:

Some subgrade of high-speed railway in operation occurred abnormal settlement,so need to reinforcement, however, the reinforcement measures and these mechanism have got little attention. Numerical analysis method was adopted to study the mechanism and effects of the grounting and churning pile which was used to reinforce soft soil subgrade a high-speed railway Results shows that the settlement and lateral deformation not symmetrical distribution but got larger along the inclined derection of stratum, reinforcement by grouting can decrease the settlement and the transverse differential deformation by improving the properties of soil, which can decrease the viod ratio and increase the compression modulus; reinforcement by churning pile which can increase the stability of embankment on soft soil subgrade. The result could provide theoretical guidance for reinforcement of soft soil subgrade of high speed railway in operation.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 866-871
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.866
• Online since: August 2013
• Authors: Jiang Wang, Long Cai Yang
• Keywords: High-Speed Railway (HSR), Inclinced Stratum, Numerical Analysis, Operation Line, Reinforcement

References

[1] Raffle, J. G. (1961), The Raltion Between the Rheological Charateristics of Grouts and their Capacity to Permeate Soil. Comptes Rendus 5'Congre's International de Me'canique des Sols et das Tauvaux de Fondations.

[2] RUAN Wenjun. Research on diffusion of grouting and basic properties of grouts[J]. Chinese journal of geotechnical engineering, 2005, 27(1): 69~73.

[3] SUN Bingtang, LING Xianzhang, LING Chen. Numerical simulation for diffusion and pressure distribution of permeation grouting[J]. SHUILI XUEBAO, 2007, 37(11): 1402~1407.

[4] ZHENG Zhipei, PENG Hui, RAO Xiao. Numerical simulation study of grouting diffusion process in soft soil foundation[J]. Rock and Soil Mechanics, 2011, 32(supp 1): 652~655.

[5] YUAN Jingqiang, CHEN Weizhong, TAN Xianjun. Mesomechanical simulation of grouting in weak strata[J]. Rock and Soil Mechanics, 2011, 32(supp2): 653~659.

[6] GONG Xiaonan. Mannal of Ground Treatment[M]. Beijing: Construction Idustrial Press of China, (2008).

[7] Ministry of Construction of the People's Republic of China. Technical code for ground treatment of building[S]. Beijing: China Building Industry Press, (2002).

[8] LIU Jinlong, CHEN Luwang, WANG Donglin. Characters of embankment on inclined weak foundation[J]. Rock and Soil Mechanics, 2010, 31(6): 2002~(2006).