级配碎石动态回弹模量实验研究.pdfVIP

6 4 Vo.l 6 2010 8 Chinese Journal ofUnderground Space and Engineering Aug. 2010 * 级配碎石动态回弹模量实验研究 1, 2 王随原 , 罗志刚 ( 1. , 200092; 2. , 400067; . , 100101) : 通过室内重复加载三轴试验研究 种级配碎石的回弹特性, 分 体应力偏应力 含水量级配类型对回弹模量的影响试验结果表明, 级配碎石回弹模量随含水量的减小围 压应力的增大而显著增大; 随偏应力的增大而缓慢增大或先略有减小再缓慢增大 (低应力状 况下); 级配类型对回弹模量也有一定影响应用非线性回归方法得到 NCHRP 128A 本构模 型参数, 将拟合得到的模型参数与物性试验结果相联系, 建立基于物性指标的模型参数预估 公式 : 级配碎石; 回弹模量; 重复加载三轴试验; 模型 : U416. 214 : A : 167 - 08 6( 2010) 04- 07 5- 07 An Experim ental Study on Dynam ic ResilientM odulus of Graded Crush Stone 1, 2 W ang Su iyuan , Luo Zh igang ( 1. Tongj i Univers ity, Shanghai 200092, China; 2. ChinaM erchants Chongqing Commun icationsR esearch Design Institute Co. , Lt . , Chongqing 400067, China; . Ch ina CivilA viation A irp ortE ngineering RD Center, B eij ing 100101, China) Abstract: Dynam ic resilient modu lus of th ree graded crush stoneswere stu ided by repeated loading triaxial test, and the effects of bulk stress, deviation stress, m oisture content and gradation type on the resilien t m odulus w ere analyzed. Resu lts indicate that the resilientm odulus of graded crush stone rem arkab ly increasesw ith moisture content decrease and/or confin ing stress increase; the resilient m odu lus of graded crush stone slow ly increases, or m inor decreases at the beginn ing and then slow ly increases w ith deviation stress increase at low stress leve.l Resu lts also suggest that the gradation typ