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| RESEARCH ON LATERAL STRESS-STRAIN RELATION ON SIDE OF FOUNDATION PIT WITH LATERAL UNLOADING |
| MEI Guoxiong1，CHEN Hao1，LU Tinghao2，YIN Zongze2 |
(1. College of Civil Engineering，Nanjing University of Technology，Nanjing，Jiangsu 210009，China；
2. Institute of Geotechnical Engineering，Hohai University，Nanjing，Jiangsu 210098，China) |
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Abstract Taking soil on the side of foundation pit excavation with consolidation-lateral unloading plane strain experiment on plane strain apparatus，the testing results indicate that the shear strength indices of soil are obviously different between the lateral unloading and routine triaxial tests. Experimental analyses show that curves of lateral stress-strain under lateral unloading are also similar to a hyperbolic type. The lateral stress-strain relation of actual stress path and lateral unloading soil on the side foundation pit is deduced using Duncan-Chang model. Results between experimental data and model predicated are coincided very well.
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Received: 17 December 2008
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