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采用自行研制的大型击实仪,对粗粒土进行了击实试验。试验结果表明:粗颗粒含量对粗粒土的最大干密度影响较大,其中粗颗粒含量为70%是粗粒土最大干密度变化的分界点;最大粒径对粗粒土的最大干密度和最佳含水量影响较小。粗粒土的最佳含水量随粗颗粒含量增加而减小,且当粗颗粒含量大于70%时,粗粒土中细粒土的含水量急剧增加。
Using self-developed large-scale compaction device, the compaction test of coarse grained soil was carried out. The results show that the coarse particle content has a great effect on the maximum dry density of coarse-grained soil. The coarse particle content of 70% is the demarcation point of the maximum dry density change of coarse-grained soil. The maximum dry- The best moisture content is less affected. The optimum moisture content of coarse-grained soil decreases with the increase of coarse-grained content, and when the coarse-grained content is more than 70%, the water content of fine-grained soil in coarse grained soil increases sharply.