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| Experimental research on mechanical properties and constitutive model of Pisha-sandstone remolded soil |
| LI Xiaoli, LI Mingyu, XIE Weidong |
| College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China |
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Abstract In order to study the the effects of water content and confining pressure on the mechanical properties of remolded arsenic sandstone soil, triaxial shear tests were carried out with TSZ-6A automatic static triaxial apparatus. The results show that with the increase of confining pressure, the shear strength of soil gradually increases, and the larger the moisture content, the smaller the shear strength of soil. And both of them show an approximate linear trend. Based on Duncan-Chang model, the constitutive model of remolded arsenic sandstone soil is established with water content and confining pressure as influencing factors. The model is applied to predict the stress-strain relationship of remol-ded soft sandstone soil with different water contents and confining pressures. The predicted results are close to the measured results, showing that the predictive model with water content and confining pressure as parameters performs better in reflecting the constitutive relationship of remolded soft sandstone soil, which will provide a theoretical basis for the application of Pisha-sandstone remolded soil in the engineering construction of this area.
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Received: 27 March 2018
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