土石混合料压实质量控制方法.pdf

第26卷第1期 2006年1月长安大学学报(自然科学版)Journal of Chang'an University (Natural Science Edition)Vol. 26土石混合料压实质量控制方法刘丽萍‘,王东耀,“(l. 安大学特殊地区公路工程教育部重点实验室,西安710064;摘要:从现行压实质量控制指标存在的问题出发,针对土石混合料颗牡组成和含水状态极不均匀的特点,为便于实际应用,引入密度千涉系数和最佳含水量系数对最大干容重的理论计算法进行了改进,探讨了用空隙率控制法和不同粗集料含量下改进的工地压实度控制方法,作为土石混合料压实质量控制标准的可行性。工程实例表明,两种方法能在一定程度上取得较好的控制效果,其中空隙率控制法不必进行室内大型击实试验但仍需求出现场干密度。关键词:道路工程;土石混合料;压实控制方法;空隙率;粗料含量;质量控制中图分类号:U416. 1文献标识码:ACompaction Quality Control Methods of Earth-rock MixtureLIU Li-ping',WANG Dong-yao"'(1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China; 2. Shaanxi Expressway Construction pany,Xi'an 710086,China)Abstract: Proceeded from the problems in the paction standard, directed against theuneven characteristics of position and water content of earth-rock mixture, this paperimproves putational method of the biggest dry density by using the coefficient of densityand optimal moisture. This paper also studies the void ratio control method and the paction method under different coarse aggregate percentage, and discusses their feasibili-ty being used paction control standard. An example shows that the two methods canachieve good results to some extent. When using the void ratio control method, a large paction test should not be done, but the field dry density must be calculated. 2 figs, 6 words; road engineering; earth-