公路下伏采空区模型试验相似材料研究

公路路基下伏采空区岩体相似材料研究是开展模型试验研究的必要条件,依据相似原理对采空区常见岩体(砂岩、泥岩)进行相似材料研究,通过概化试验模型,确定几何比及物理相似比,确定相似材料满足的强度要求。同时,把粉煤灰应用于岩石相似材料中,并取得了较好的效果,相似材料及相似比的确立为采空区室内模型试验研究提供了研究基础。

Study on Similar Material for Model Test on Mined-out Area Under Highway

The research on material similar to rock mass in the mined-out area under highway subgrade is necessary to develop the goaf exploration by model test. According to the similarity principle, the material similar to the common rock (sandstone or mudstone) therein was studied. This paper, through generalized test model, specified the geometrical ratio and physical ratio of similitude, as well as the strength requirement that should be met by the similar material. At the same time, the application of flyash in such similar material got good result. The specification of similar material and the ratio of similitude is the basis of the indoor goaf model test.