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本文通过室内试验,按照振动法成型试件的原理,总结了压实度K、含水量W、空隙率VV和级配范围等因素对级配碎石力学性能的影响,从而揭示级配碎石力学原理,以便今后指导级配碎石设计、施工。经过试验:随着压实度K的不断提高、试件内部含水量W的降低,级配碎石的力学性能得到明显提高;压实度K在97.4%～99.5%之间,压实度K每提高1%,级配碎石抗压强度可以提高13%～45%;与最佳含水量Wopt的试件相比,当W=1/2Wopt时,级配碎石抗压强度提高28%,劈裂强度提高30%,CBR值提高9%;当W=0时,级配碎石抗压强度提高95%,劈裂强度提高415%,CBR值提高15%。由此可以提出级配碎石的最佳级配范围。为今后级配碎石施工、设计提供参考依据。
In this paper, the influence of factors such as compaction degree K, water content W, voidage VV and grading range on the mechanical properties of graded crushed stone was summarized through laboratory experiments and according to the principle of forming specimen by vibration method, Mechanics, in order to guide the graded gravel design, construction. After the test: With the continuous improvement of the compaction degree K, the internal moisture content W of the test piece decreases, the mechanical properties of the graded broken stone are obviously improved; the compaction degree K is between 97.4% -99.5%, the compaction degree K With the increase of 1%, the compressive strength of graded crushed stone can be increased by 13% -45%. Comparing with Wopt, the compressive strength of graded aggregate increased by 28% when W = 1 / 2Wopt, , The breaking strength increased by 30% and the CBR value increased by 9%. When W = 0, the crushing strength increased by 95%, the splitting strength by 415% and the CBR by 15%. From this it is possible to propose the optimal grading range for graded gravel. Grading for future gravel construction, design provides a reference.