School of Resources & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan, 411201, People's Republic of China.
Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan, 411201, People's Republic of China.
Sci Rep. 2023 May 21;13(1):8203. doi: 10.1038/s41598-023-35199-0.
In this paper, the development law of residual deformation of coal gangue subgrade filler is analyzed through large scale triaxial test, and the residual deformation model of coal gangue mainly sandstone and limestone is established. The purpose is to provide research basis for the applicability of coal gangue as subgrade filler. The results show that the deformation of coal gangue filler increases first and then tends to be constant under cyclic load of multiple vibration times. It is found that the Shenzhujiang residual deformation model cannot accurately predict the deformation law, and the corresponding modification is made to the residual deformation model of coal gangue filling body. Finally, according to the calculation of grey correlation degree, the influence degree of main factors of coal gangue filler on its residual deformation is sorted. Combined with the actual engineering situation represented by these main factors, it can be analyzed that the effect of packing particle density on residual deformation is greater than that of packing particle size composition.
本文通过大型三轴试验分析了煤矸石路基填料残余变形的发展规律，建立了以主要砂岩和石灰岩煤矸石为代表的残余变形模型。目的是为煤矸石作为路基填料的适用性提供研究依据。结果表明，在多次振动循环荷载作用下，煤矸石填料的变形先增加后趋于稳定。研究发现，神珠江残余变形模型不能准确预测变形规律，对煤矸石填筑体的残余变形模型进行了相应的修正。最后，根据灰色关联度的计算，对煤矸石填料主要因素对其残余变形的影响程度进行了排序。结合这些主要因素所代表的实际工程情况，可以分析得出，堆积颗粒密度对残余变形的影响大于堆积颗粒粒径组成的影响。
