| Experimental study of the effects of non-uniformly distributed fine soil on mechanical properties of Shenyang–Dandong Railway coarse-grained soil |
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| 作者姓名： | QianMi Yu JianKun Liu JingYu Liu DingJun Lv TengFei Wang |
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| 基金项目： | This work was supported by the National Basic Research Program of China (973 program, Grant No. 2012CB026104) and the National Natural Science Foundation of China (Grant Nos. 41271072, 41371081 and 51378057). |
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| 摘 要： | The stress produced by repeated train loads decreases with increasing railway subgrade bed depth, and slightly weathered coarse particles of subgrade bed fillings can be broken at different levels under continuous load. Thus, the mass of fine soil, with a diameter of not more than 0.075 mm, is different at different depths. Fine soil is also sensitive to frost heave and thaw settlement. In order to study the effects of non-uniformly distributed fine soil on the mechanical properties of coarse-grained soil of the Shenyang-Dandong Railway, triaxial tests were conducted with three types of specimens, undergoing six freeze-thaw cycle numbers(0, 1, 3, 7, 9, 12) and three confining pressures(100, 200, 300 k Pa). The freezing temperature is-5 °C and the thawing temperature is +15 °C. The stress-strain behavior, static strength, resilient modulus, cohesive force and the angle of internal friction were measured for different tested specimens. As a result, the law of static strength and resilient modulus of different specimens following the increase of freeze-thaw cycles under three confining pressures is obtained. The changing law of cohesive force and friction angle of three specimens following the increase of freeze-thaw cycles is also calculated, and the different results of different specimens are also compared.
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Experimental study of the effects of non-uniformly distributed fine soil on mechanical properties of Shenyang-Dandong Railway coarse-grained soil |
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| QianMi Yu,JianKun Liu,JingYu Liu,DingJun Lv,TengFei Wang.Experimental study of the effects of non-uniformly distributed fine soil on mechanical properties of Shenyang-Dandong Railway coarse-grained soil[J].Sciences in Cold and Arid Regions,2015,7(5):503-512. |
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| Authors: | QianMi Yu JianKun Liu JingYu Liu DingJun Lv and TengFei Wang |
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| Institution: | School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | |
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| Keywords: | fine soil non-uniform distribution freeze-thaw cycles soil mechanical properties |
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