机场跑道水泥稳定珊瑚砂基层配合比研究与应用
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摘要
依托马尔代夫维拉纳国际机场改扩建项目,针对珊瑚砂地质特性进行了大量现场试验、室内试验,对珊瑚砂的物理力学特性进行研究分析,用其配制水泥稳定层作为跑道基层。通过掺配不同比例水泥及进行击实试验,确定水泥稳定层的最佳配合比,使其7d无侧限抗压强度达到2. 5MPa以上。现场实际施工效果良好,各项试验数据显示强度、抗裂性均较好,满足设计要求。
Relying on the reconstruction and extension project of Velana International Airport in Maldives,a large number of indoor and insitu tests have been carried out on the geological characteristics of coral sands. The physical and mechanical properties of coral sands have been studied and analyzed,and the cement stabilized layer has been prepared as the base of runway. Through mixing different proportion of cement dosage and compaction tests,the optimum mix ratio of water-stabilized layer is determined,so that the unconfined compressive strength of 7 days can reach 2. 5 MPa or more. The field construction effect is good,and the test data show that the strength and crack resistance are good,which meets the design requirements.
Relying on the reconstruction and extension project of Velana International Airport in Maldives,a large number of indoor and insitu tests have been carried out on the geological characteristics of coral sands. The physical and mechanical properties of coral sands have been studied and analyzed,and the cement stabilized layer has been prepared as the base of runway. Through mixing different proportion of cement dosage and compaction tests,the optimum mix ratio of water-stabilized layer is determined,so that the unconfined compressive strength of 7 days can reach 2. 5 MPa or more. The field construction effect is good,and the test data show that the strength and crack resistance are good,which meets the design requirements.
引文
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[4]郭超.南海岛礁珊瑚集料混凝土工程性能研究[D].南京:东南大学,2017.
[5]于红兵,孙宗勋,唐诚.南沙群岛珊瑚砂物理力学性质研究[J].Marine science bulletin,2006(2):31-39.
[6] ANGEMEER J,CARLSON E G,KLICK J H. Techniques andresults of offshore pile load testing in calcareous soils[C]//Houston,America:Offshore Technology Conference,1973.
[7] LEE C Y,POULOS H G. Tests on model instrumented groutedpiles in offshore calcareous soil[J]. Journal of geotechnicalengineering,1991,117(11):1738-1753.
[8] SUN Z X,ZHAN W H,ZHU J J. Rockmass structure andengineering geological zones of coral reefs,Nansha Islands ofSouth China Sea[J].Journal of tropical oceanography,2004(3):11-20.