针对目前唧泥程度与路面板底脱空相关关系国内外研究较少以及常用压浆材料处治板底脱空存在"二次脱空"的情况,以烟台—威海高速公路试验段为依托工程,通过对试验段唧泥高度观测数据的统计分析,结合钻孔实测板底脱空量,提出基于唧泥高度的路面板底脱空程度判定标准;并引入自膨胀补偿收缩理论,改良有机类和水泥类压浆材料,推荐分别适用于处治路面板底轻度、中度和重度脱空的自补偿式压浆材料。试验段钻孔复核与弯沉检测结果表明:基于唧泥高度的路面板底脱空判定标准准确度可达80%以上;板底脱空路面板经推荐的自补偿式压浆材料处治后弯沉小于0.2mm。
In order to solve the problem that the domestic and overseas researches on the relation ship between the voids beneath slabs of the pavement and the degree of pumping were few and the common mud-jack materials used for voids treatment could cause voids again, based on Yantai- Weihai highway testing section as backing project, the evaluation criteria for detecting the degree of voids based on pumping height were put forward by analyzing the statistical observed data of pumping height and practical drill-detecting data of voids in the testing section. The cement and organic mud-jack materials were improved by using the shrinkage compensating principle, then the suitable self-compensation mud jack materials were recommended for treating the slight, moderate and severe degree of voids. The rechecking results of drilling and deflection detecting indicate that the accuracy of the evaluation above reaches 80, and the deflection of pavement slabs with voids treated by the recommended self-compensation mud-jack materials is less than 0.2 ram. 4 tabs, 4 figs, 11 refs.