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为解决工程应用中大厚度压实的难点,全面深入对比不同压实机械的压实性能,明确不同压路机的技术性能特点,提出工程应用中压实设备类型的选择依据。通过系统试验重点研究了半刚性基层材料大压实功压实规律,得到了大压实功下最佳含水率及最大干密度的压实曲线,并与常规压实曲线进行了对比分析,得到了压实设备的吨位与压实厚度的匹配关系。结果表明:当通过增加击实次数使击实功增加28.6%时,其最大干密度提高了3.27%,含水率几乎没有变化;增加击实力使击实功增加28.6%时,最佳含水率减少15.7%,最大干密度提高了3.22%;通过压实度现场检测,采用大吨位压路机施工的路段,质量符合规范要求,为大吨位压实工程应用、压实参数选择与压实质量控制提供了科学依据。
In order to solve the difficulty of large-thickness compaction in engineering application, the compaction performance of different compaction machines is compared in an all-round and in-depth manner, the technical performance characteristics of different compaction rollers are clarified, and the selection basis of compaction equipment types in engineering application is put forward. The compaction curve of the big compaction of semi-rigid base material has been studied emphatically through the system test. The compaction curve of the optimum moisture content and the maximum dry density under the big compaction has been obtained and compared with the conventional compaction curve. The compaction equipment tonnage and compaction thickness of the matching relationship. The results showed that the maximum dry density increased by 3.27% when the compaction effort was increased by 28.6% by increasing the number of compaction times, with almost no change in the water cut. When the compaction strength was increased by 28.6%, the optimum moisture content decreased 15.7% and the maximum dry density increased by 3.22%. Through the on-site testing of compaction degree and the construction of sections with large tonnage roller, the quality conforms to the requirements of the specification, which provides the application of compaction parameter selection and compaction quality control for large tonnage compaction project Scientific basis.