沥青基隔离层对机场道面疲劳寿命影响评价  

Evaluation of Influence of Asphalt-based Separation Layer on Fatigue Life of Rigid Runway Pavement

作　　者：杨永胜 YANG Yongsheng(ANHUI Civil Avlation Ariport Group Co.,Ltd.,Hefei 230051,China)

机构地区：[1]安徽民航机场集团有限公司,合肥230051

出　　处：《交通科技》2020年第5期71-74,共4页Transportation Science & Technology

摘　　要：文中从道面疲劳寿命角度评价了沥青基隔离层在水泥道面中的结构效应,提出考虑板底脱空的分段式道面寿命计算方法,对设置沥青基隔离层对水泥道面使用寿命的影响进行计算分析。研究证实设置沥青基隔离层能够有效提高道面的使用寿命,脱空发生的越早,设置沥青基隔离层越能够有效避免水泥道面过早疲劳开裂。若无脱空,隔离层实际上增大板中的弯拉应力,但是考虑到板块中产生脱空的必然性,使用隔离层仍然是十分必要的。The structural effect of the asphalt-based separate layer in rigid runway pavement was evaluated from the respect of pavement fatigue life.A method was proposed to calculate the sectional fatigue of pavement considering the voids at the bottom of the slab.Employing the proposed method,the fatigue life of pavement with a separation layer was computed.It is confirmed that the use of the separation layer can effectively enhance the fatigue life of the pavement.The earlier voids appear,the more effective is the separation layer by preventing the fatigue crack caused by scouring,thus the pavement service time is lengthened.Though the separation layer increases the tensile stress if there are no voids,it is still necessary to use it considering the inevitability of voids at the slab.

关 键 词：水泥道面 沥青基隔离层 板底脱空 疲劳寿命 

分 类 号：U416[交通运输工程—道路与铁道工程]