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为了探究纤维加筋固化土技术应用于应急机场的可行性,通过无侧限抗压强度试验,探究了不同掺量和龄期的水泥、固化剂以及纤维复合固化黄土的强度特性。结果表明:固化剂与纤维可以提高黄土无侧限抗压强度,其中水泥固化效果最优,且最优掺量为8%,随着纤维和砂掺量的增加,加筋固化土的强度先增大后又减小,纤维掺量为0.30%和0.45%时固化黄土强度较高,砂的最佳掺量在4%左右。进行简易机场布设时,建议机场道面工程使用12 mm改性聚丙烯纤维掺量0.45%,固化剂选用P.O 32.5R硅酸盐水泥掺量8%,砂掺量低于4%的复合固化土。
In order to explore the feasibility of fiber reinforced soil curing technology applied to emergency airports, the strength characteristics of cement, curing agent and fiber composite solidified loess with different dosage and age were explored through unconfined compressive strength test. The results show that the curing agent and fiber can improve the unconfined compressive strength of the loess, the curing effect of the cement is the best, and the optimal content is 8%. With the increase of fiber and sand content, the strength of the reinforced soil When the fiber content is 0.30% and 0.45%, the strength of solidified loess is higher, and the optimal content of sand is about 4%. For the airstrip layout, it is recommended that the airport pavement project uses 12 mm modified polypropylene fiber content of 0.45%, the curing agent selected PO 32.5R Portland cement content of 8%, sand content less than 4% of the composite curing soil .