At present , the maximum dry density , which is a very import parameter of the degree of compaction , is ascertained by standard indoor compaction test 目前，对于公路工程路基土施工质量压实度检测应用的最大干密度是通过室内标准击实试验来确定。
Unbound and hydraulically bound mixtures - part 2 : test methods for the determination of the laboratory reference density and water content - proctor compaction 松散的和液力粘合的混合料.第2部分:实验室参考密度和水含量测定的试验方法.普氏击实试验
Unbound and hydraulically bound mixtures - part 51 : method for the manufacture of test specimens of hydraulically bound mixtures using vibrating hammer compaction ; german version en 13286 - 51 : 2004 松散的和液力粘合的混合料.第51部分:利用振动锤击实
Many beating experiments of different quantity of added lime and unlimited compress strength experiments of different protective time have been made 为了研究掺石灰对膨胀土的影响，进行了不同掺灰率的击实试验和不同龄期的石灰土无侧限抗压强度试验。
The test results indicate that the dilatability is closely associated with the compaction and the difference among the diameters of the crushed clayrocks influence their characters 结果表明，击实功与膨胀性之间有密切关系，而且粘土岩粉碎的粒径对压实性和膨胀性是有影响的。
According to the data of besting experiments , the paper analyses the relationship between the optimal water content and the quantity of added lime , analyses the relationship between the maximal dry density and the quantity of added lime 从击实试验的结果得到石灰土最佳含水量与掺灰量的关系，最大干密度与掺灰量的关系。
According to the data of beating experiments , the paper analyses the relationship between the optimal water content and the quantity of added lime , analyses the relationship between the maximal dry density and the quantity of added lime 从击实试验的结果得出了石灰土最佳含水量与掺灰量的关系，最大干密度与掺灰量的关系。
Generally , no less than one compaction test is needed for any earth sample . when the sample has a little change , it is necessary to carry out another test , which would have great influence on construction schedule 一般一种土样至少需要做一个击实试验，土样稍有变化又需另作，从而给检测、监理人员造成较大负担，往往对施工进度有较大影响。
Therefore , it is urgent to study an advanced and convenient method obtaining maximum dry density in - situ . by means of data from kai - luo expressway , this paper established a mathematical model of compaction function by analyzing the characteristic of compaction curve 因此，迫切需要用快速、准确、方便的由现场干密度推算最大干密度的先进方法来逐步代替传统的标准击实试验。
According to the results of the compaction test and hearing ration test , it is discovered that the filled soil also has the swelling property after being compressed , which may result in the crack of the subgrade with the change of the water contents 通过对路基填土的击实试验和承载比试验表明，填土压实之后具有一定的膨胀性，在含水量变化差异性影响下的胀缩变形可能导致路基开裂。
