论文部分内容阅读
基于简易机场建设的特点和使用要求,选用济宁土在室内进行了液限、塑限、击实、回弹模量、CBR和无侧限抗压强度试验。在室外选择抗耐土壤稳定剂、水泥、石灰、二灰(水泥与石灰)等稳定土修筑了试验段,进行了回弹模量、CBR、弯沉、土压力和滚动摩擦因数试验,对比研究了抗耐土壤稳定剂与传统无机结合料的加固效果。分析结果表明:在室内试验中,济宁土掺入抗耐土壤稳定剂后,其水理性能、回弹模量和无侧限抗压强度均有提高,尤其是掺入0.8%AC101稳定剂时,塑性指数降低了21.9%,最佳含水量减少了3.1%,最大干密度与CBR值分别增大了1.32%、61.5%;涂刷HOD1稳定剂后,试件在浸水和不浸水的条件下,CBR值分别提高了212%、146%。在现场试验中,抗耐稳定土的早期承载能力与水泥土、二灰土作用效果基本相同,高于石灰土,但随着加固土龄期的增长,水泥土、二灰土承载能力的增长幅度要大于抗耐稳定土,28d龄期时抗耐稳定土与石灰土的承载能力基本相同。
Based on the characteristics and requirements of the airstrip construction, Jining soil was selected to carry out liquidity limit, plastic limit, compaction, springback modulus, CBR and unconfined compressive strength test indoors. The test section was built by choosing stable soil resistant to soil stabilizer, cement, lime and lime (cement and lime) outdoor, and the tests of resilience modulus, CBR, deflection, earth pressure and rolling friction coefficient were conducted. The anti-resistant soil stabilizer and the traditional inorganic binder reinforcement effect. The results show that: In laboratory experiments, Jining soil incorporation of anti-soil stabilizer, its water-based properties, modulus of resilience and unconfined compressive strength are improved, especially when mixed with 0.8% AC101 stabilizer , The plasticity index decreased by 21.9%, the optimum water content decreased by 3.1%, the maximum dry density and the CBR value increased by 1.32% and 61.5% respectively. After brushing HOD1 stabilizer, the specimens were immersed and not soaked , CBR value increased 212%, 146% respectively. In the field test, the early bearing capacity of stabilized soil is basically the same as that of cement soil and lime soil, which is higher than that of lime soil. However, with the increase of soil age, the increase of bearing capacity of soil cement and lime soil Greater than the resistance to resistant soil, 28d age anti-stable soil and lime soil bearing capacity is basically the same.