Experiment Study on Reinforcement Effect of Composite Foundation in Saline Soils

Abstract:

Using DPT and plate loading test, the paper analyzed different reinforcement effects from four different reinforcement technologies－gravel piles method, dynamic compaction method, dynamic compaction replacement (DCR) method and impact compacted method for Cha-Ge highway saline soils ground located in salt lake area, and got the following conclusions: (1) DCR method has the best reinforcement effect, and impact compacted method has the worst. There is a difference of 166.9 % between them. (2)Tamping energy is important on reinforcement effect to the last three methods and related directly to the values of the strengthened bearing capacity and deformation modulus. The DCR method and gravel piles method mentioned above are useful on reducing the settlement of natural saline soils foundation. In recent years, a lot of ground treatment methods are widely used to consolidate soft soil foundation for its short period and simple construction and so on. Numerous scientists and engineers have obtained useful results and experience from DCR and gravel piles foundation treatment of soft soil [1,2,3,4]. (e.g., A. G. Phear, S. J. Harris, 2008; Dong,Yan and , 2009; Huang, Zhou and He, 2006; Liu, 2006;); But the reinforcement in regions of saline soils, such as DCR hasn't been well researched; theoretical study is far behind engineering practice; so it is hard to build up the design theory and method..

• Periodical: Advanced Materials Research (Volumes 622-623)
• Pages: 1721-1724
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.622-623.1721
• Online since: December 2012
• Authors: Yu Zhang, Jian Kun Liu, Jian Hong Fang, An Hua Xu
• Keywords: Dynamic Compaction, Dynamic Compaction Replacement (DCR), Field Experiment, Gravel Piles, Impact Compacted, Saline Soils

References

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[3] Huang, Xiao-Bo, Zhou, Li-Xin, He Shu-Jun and Zhou Hu-Xin: Study on test of saline soil ground treatment with the soaking and dissolving combined dynamic compaction method Yantu Lixue/Rock and Soil Mechanics, v 27, n11, pp.2080-2084, (2006).

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[8] ZhangYu, Fang, Jian-Hong; Liu, Jian-Kun, Xu An-Hua: Field tests on reinforcement effects of ground treatment of composite foundation in saline soils by dynamic compaction replacement. Chinese Journal of Geotechnical Engineering, v 33, n SUPPL. 1, 251-254 (2011).

DOI: 10.3724/sp.j.1226.2013.00440