To solve the problems such as high water content,low bearing capacity and reutilization of fly ash in soft soil,the combination of fly ash and cement in solidifying soft soil was carried out by in-situ solidification and strong mixing processes.The light dynamic penetration tests on solidified soil under different binder amounts,treatment depths and curing ages were carried out to analyze the in-situ data systematically.The results show that adding 1％fly ash can effectively reduce the water content of cement-solidified soft soil,and the reduction rate rises with increasing cement content.The in-situ solidification of fly ash combined with cement has little effect on density of soft soil,but it will limit the development of bearing capacity.The bearing capacity fluctuates greatly with depth,and increasing the treatment depth helps to reduce the fluctuation range.The use of fly ash combined with cement will further enhance the stabilization of heavy metals and pollutants.Based on the bilinear interpolation algorithm,the quantitative evaluation method of curing ratio is proposed,and the coefficient of variation is introduced to establish the evaluation index of in-situ solidification,which can provide a reference basis for similar soft soil in-situ solidification construction projects.
关键词
原位固化/软土/水泥/粉煤灰/变异系数
Key words
in-situ solidification/soft soil/cement/fly ash/coefficient of variation
维普
万方数据