不同洒水量下泥岩路基填料崩解特征的差异性

摘要

对泥岩进行预崩解是将泥岩等软岩作为路基填料的主要处理方法之一.通过对承德平泉地区分布的两种泥岩做不同洒水量下的干湿循环试验并使用X射线衍射仪进行观察分析,重点探讨泥岩崩解速率与泥岩颗粒粒径的关系以及不同洒水量下泥岩崩解的变化规律.结果表明:灰褐色与砖红色泥岩颗粒完全崩解时需要的干湿循环次数与泥岩的初始颗粒级配没有直接关系.两种泥岩作为路基填料时,在单次最佳洒水量下,均进行7次左右干湿循环后崩解处于稳定状态,可以为泥岩预崩解控制指标提供重要的参考,并为将泥岩填料作为路基的实际工程提供有效指导.%Pre-disintegration of mudstone is one of the main treatment methods of mudstone and other soft rock as roadbed filling.Based on the two kinds of mudstone distribution in Pingquan area of Chengde dry wet cycle test of different water sprinkling conditionand X ray diffraction were analyzed,focusing on the relationship between the rate of disintegration mudstone and mudstone particle size and different amount of sprinkler mudstonedisintegration change.The results show that the number of wetting cycles required by the disintegration of grey brown and brick red mudstone is not directly related to the initialparticle size distribution of mudstone.When the two kinds of mud-stone are used as roadbedfilling materials,they are disintegrated at 7 times after the dry and wet cycle,and they are stable at the single optimum water volume.The research results can provide important reference value for the con-trol index of mudstone pre disintegration,and provide effective guidance for the practical project of mudstone filling as roadbed.