复合土工膜在冻土机场路基冻害控制的应用研究  

Application of composite geomembrane in frost damage control of frozen soil airport subgrade

作　　者：吕秋臻 张瑾 时伟[1] 李广胜 张甲峰 LYU Qiuzhen;ZHANG Jin;SHI Wei;LI Guangsheng;ZHANG Jiafeng(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China;Shanghai CAAC New Era Airport Design and Research Institute Co.Ltd.,Shanghai 200120,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525 [2]上海民航新时代机场设计研究院有限公司,上海200120

出　　处：《青岛理工大学学报》2022年第4期41-47,共7页Journal of Qingdao University of Technology

基　　金：国家自然科学基金青年基金项目(41702320);山东省高等学校科技计划项目(J17KA204)。

摘　　要：结合新疆某机场建设实例,对机场西端400 m跑道道面破坏形式进行统计,分析冻胀原因,并根据工程情况,建立飞机降落瞬间受力点截面有限元分析模型,对比有无土工膜的情形下机场跑道路基应力、竖向变形,以及复合土工膜在不同布设深度情况下对路基竖向位移的影响。研究发现,下部土层含水会导致土层承压能力降低,是造成路基冻害的主要原因。在同样的荷载条件下,复合土工膜布设存在最佳布设深度。复合土工膜能够有效降低飞机冲击荷载作用下路面的应力和竖向位移大小,起到了保护路面、延长路面寿命的作用。Combined with the construction of an airport in Xinjiang,the damage forms of 400 m at the west end of the airport runway pavement are statistically analyzed,and the causes of frost heaving are analyzed.According to the engineering situation,the finite element analysis model of the section of the stress point at the moment of aircraft landing is established to compare the influence of the subgrade stress and vertical deformation of the airport runway with or without geomembrane,and the influence of the composite geomembrane on the vertical displacement under different layout depths.It is found that the water content in the lower soil layer reduces the bearing capacity of the soil layer,which is the main reason for the frost damage of subgrade.Under the same load conditions,the composite geomembrane has the best placement depth.The composite geomembrane can effectively reduce the stress and vertical displacement of the pavement under the impact load of aircraft,and play a role in protecting the pavement and prolonging the life of the pavement.

关 键 词：复合土工膜 机场跑道 冻土区 防渗 

分 类 号：TU475.2[建筑科学—结构工程]