摘要
为了研究水泥土在实际应用中经一定次数的循环荷载作用后,抗压强度的变化情况,得到循环荷载对水泥土耐久性影响的一般规律,通过正交试验的方法,得到了经不同频率、振幅、次数的循环载荷加载后水泥土的抗压强度,并通过极差分析、方差分析,探究了频率、振幅、次数对水泥土抗压性能影响的主次关系,分别建立了在设计范围内水泥土抗拉强度随循环荷载的频率、振幅、次数变化的回归方程。试验结果表明:在试验设计范围内,水泥土抗压强度随循环荷载的振幅及次数增加而逐渐降低;频率对水泥土抗压强度影响相对最小,无明显变化;其中次数影响最为明显,振幅的影响次之。
In order to get the change of compressive strength of cemented soil which go through cycle loading,and the general rule of cyclic loading affecting the durability of cement-soil, the cycle loading with different frequency,amplitude and the number of times,the compression tests were performed to obtain the compressive strength of cemented soil. The effects of frequency,amplitude and the number of times were gain by range analysis and variance analysis. The regression equation of cemented soil compressive strength changing with frequency,amplitude and the number of times was established. The results show that the compressive strength of cemented soil decreases gradually when the amplitude and the number of times increase in cycle loading. The number of times has the biggest influence on cemented soil compressive strength,the amplitude comes second,and frequency is the smallest.
出处
《地下空间与工程学报》
CSCD
北大核心
2017年第S2期524-528,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(51607332
51279109)
关键词
水泥土
抗压强度
频率
振幅
次数
soil-cemented
compressive strength
frequency
amplitude
count
