土石混填路基压实度检测新方法研究

Study on New Method for Checking Compactness of Soil-rock Mixture Subgrade

土石混填路基压实质量的控制一直是一个难题,利用一般的压实度检测方法存在许多局限性与不足。首先基于快速静载试验,建立静载试验荷载—变形曲线与土石混填体密实度之间的理论模型;然后进行了室内模型试验,制作了各种形状及尺寸的探头,在不同含石量、不同压实度的路基上进行了试验,探讨了快速静载试验中各种影响因素的敏感程度;最后通过实验所得到的快速静载试验曲线,确定了合理的加载方式,探头形状及尺寸,提出了基于快速静载试验的土石混填路基压实度检测新方法,该方法具有可行性与合理性。

Compaction Quality of soil-rock mixture subgrade is difficult to control. Some limitations and insufficiencies still could be found using general compactness checking method. Firstly, the theoretical model is set up between load deflection curves and compactness of soil-rock mixture subgrade based on static load test in this paper. Secondly, A laboratory model test was conducted, probs of various size and shape were made to testing on soil-rock mixture subgrade of different content of stone and com- pactness, the sensitive degree of various influence factors are discussed. Finally, then the reasonable loading model, the shape and size of probe are determined. Furthermore, a new method for checking compactness of soil-rock mixture subgrade is put forword, which is feasihe and rational.