The Impact of Stress History on Reinforced Silty Clay

Abstract:

The interfacial characteristic of reinforcement plays a significant role in reinforced engineering, and stress history is one of the key factors affecting the interfacial characteristics. By using the comprehensive geosynthesis test apparatus, a series of pull-out tests were carried out by using reinforced soil composed of silt clay and biaxial polypropylene geogrid. Base on the results of the tests and their curve between shear force and displacement, the impact of stress history on the interfacial characteristics of reinforced soil was explicitly discussed in both qualitative and quantitative manner. It is revealed that the soil’s stress history has great impact on the interfacial parameter of c (cohesive force) and  (internal frictions angle )of the reinforcement; the interfacial parameter of c and  in silty clay is increased by 12.10% and 8.56% respectively when the OCR (over consolidation ratio) increase from 1 to 2; and methods like increasing the thickness of cover soil or increasing the times of rolling to form over-consolidation can reach more higher shear strength in specified project. The results of this research should be a guide to the test, design and construction of reinforced silty clay engineering.

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 424-427
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.424
• Online since: May 2012
• Authors: Jian Xiu Wang, Tian Rong Huang, Wen Bai Liu
• Keywords: Quantitative Comparison, Reinforced Silty Clay, Stress History

References

[1] VIDAL H. The principal of reinforced earth. Highway Research Record 282[R]. Washington D C: Highway Research Board, National Research Council, 1969: 1-24.

[2] Lopes, M.L., Ladeira, M. Influence of the confinement, soil density and displacement rate on soil-geogrid interaction. Geotextiles and Geomembranes, 1996，14: 543-554.

DOI: 10.1016/s0266-1144(97)83184-6

[3] GUO Lin-yang,Wang Yong-he. The test and studies of geogrid's engineering characteristics in reinforced soil. China Journal of Highway and Transport, 2001, 3:11-16. (In Chinese)

[4] Moraci, N., Recalcati,P. Factors affecting the pullout behaviour of extruded　geogrids embedded in a compacted granular soil. Geotextiles and Geomembranes, 2006, 24:220-242.

DOI: 10.1016/j.geotexmem.2006.03.001

[5] ZHANG Wen-hui, WANG Bao-tian, ZHANG Fu-hai. The impact of water ratio on interaction between warp geogrid and soil. Chinese Journal of Central South Highway Engineering, 2007, 32(3): 24-27. (In Chinese)

[6] YANG Guang-qing, LI Guang-xin, ZHANG Bao-jian. Experimental studies on interface friction characteristics of geogrids. Chinese Journal of Geotechnical Engineering, 2006, 28(8): 948-952. (In Chinese)

[7] Qian Jia-huan,Yin Zhong-ze. The principle and calculation of geotechnical engineering. China WaterPower Press.1995 (In Chinese)