高填方路基原位水平推剪试验研究

Research on In-situ Horizontal Push Shear Test of High Fill Subgrade

为了避免土石混合体的离散性对水平推剪试验产生的滑动面带来的不规则性影响,并解决由此带来的土力学参数获取困难的问题,开展了系列原位水平推剪试验,采用近距离摄影测量技术构建3D试验现场模型,同时结合Matlab编程与Geomagic软件的相关处理,提出了一种新的原位水平推剪试验三维模型建立方法,并通过此方法获得了某高填方路基的土力学参数。从处理效果可知,该方法合理有效。

To avoid irregular effects of the discrete soil-rock mixture on the sliding surface in the horizontal push and shear test and approach,and solve the problem that it is difficult to obtain the soil mechanical parameters,in this paper,a range of in situ horizontal push and shear tests were conducted,where a 3D test field model was set up by close-up photogrammetry;besides,Matlab programming and Geomagic software processing were combined to propose a new 3D modeling method for in situ horizontal push and shear test.This method was used to obtain soil mechanical parameters of a certain highfill subgrade.The testing results showed that this method is reasonable and effective.