基于优化级配方程的红砂岩崩解特性及应用研究

Disintegration characteristic and application of red sandstone based on optimized gradation equation

红砂岩被广泛用作各类工程填料,在自然环境中反复干湿循环作用下易产生崩解,从而引发大量工程问题。以湖南株洲地区的红砂岩为研究对象,对干湿循环作用下岩石崩解后颗粒粒径的分布状况及颗粒级配的变化规律进行了深入研究。结果表明:干湿循环作用下红砂岩崩解颗粒的级配曲线整体呈反S形。基于优化级配方程对红砂岩的崩解特性进行了研究,分析了优化级配方程对崩解颗粒级配描述的适用性,结合已有的崩解指标,验证了级配参数作为崩解指标的可行性,且指出了优点所在,并对岩石崩解后颗粒级配的均匀程度进行了研究。

Red sandstone is widely used as a kind of engineering filler, and it is prone to disintegration under repeated dry and wet cycles in the natural environment, which causes a lot of engineering problems. The red sandstone in Zhuzhou area of Hunan Province was taken as the research object, the distribution of particle size and the variation of particle gradation after disintegration under dry and wet cycles were studied. The results showed that the gradation curve of red sandstone disintegration particles under the dry and wet cycle showed the anti-S-shaped. Disintegration characteristic of red sandstone was studied based on the optimized grading equation, and the applicability of the optimized grading equation to the grading description of disintegration particles was analyzed. The feasibility of the gradation parameters as a disintegration indicator was verified combined with the existing disintegration indicators, and the advantages were pointed out. The uniformity of particle grading after rock disintegration was also studied.