前言路堤压实程度从前多采用测定填料土的密实程度——干容重法来控創,该法没有实际意义,另外试样从现场送到实验室测定含水量等方面也不方便,容易产生误差。尔后发展采用了CBR法,其试验与道碴颗粒压入基床表层相类似,因而有一定的实际意义;但使用CBR法插入贯入棒时,其荷载影响深度较浅,若局部有小碎石存在于表层则影响很大,往往不能 Preface Embankment compaction degree more often used to determine the density of filler soil - dry bulk method to control Chuang Chong, the law is not practical, the other from the scene sent to the laboratory to determine the water content is not convenient, prone to error . The CBR method was adopted later, and the experiment was similar to the ballast particles pressing into the surface of the bed. Therefore, it has some practical significance. However, when using the CBR method to insert the penetration rod, the load has a shallow depth. If there is a small part The presence of stone in the surface is very large, often can not