摘要
通过直剪试验对新疆某地区典型膨胀岩重塑土在不同含水率干密度,以及干湿循环状态下的强度指标进行研究,研究发现膨胀岩的强度指标随着含水率的增加,出现先增加后减小的趋势,粘聚力和内摩擦角都存在最佳含水率使强度指标达到最大值,当含水率相同,膨胀岩的强度指标随着干密度的增加,粘聚力增加,内摩擦角的变化不大。在干湿循环的作用下强度指标随着干湿循环次数的增加而减小,但是在一定次数以后,强度指标下降已不明显,最后逐渐趋于稳定。
The strength parameters of a typical remolded expansion rock of different water contents and dry weight densities, as well as in wetting and drying cycles state in some region of Xinjiang were studied by directing shear experiment. The research indicated that with the increase of moisture content, the strength parameters of expansion rock increase at first and decrease subsequently, and there is the best moisture content of cohesion and angle of internal friction to get the maximum of strength. In case of the same water content, with the increase of dry weight density, the cohesion of expansion rock increases, but the angle of internal friction changes little. With the increase of the wetting and drying cycles, the strength of expansion rock decreases, but after a certain number, the strength parameter doesnI decline obviously and finally stabilize ~raduallv.
出处
《水资源与水工程学报》
2013年第6期92-94,共3页
Journal of Water Resources and Water Engineering
基金
新疆水利水电重点学科基金项目(XJXZ-2003-16)
关键词
膨胀岩
干密度
干湿循环次数
抗剪强度参数
expansive rock
dry density
times of drying and wetting cycle
shear strength parameter
