摘要
为满足沉管隧道混凝土铺装路面的特殊要求,通过论证分析,设计了AC-10+沥青卷材、GA-10+环氧树脂撒砂和AC-10+应力吸收层3种沥青保护层结构,并针对3种沥青保护层结果的层间粘结性能、抗反射裂缝性能、防水性能和抗水损坏性能进行室内试验。结果表明,前2种方案的常温层间拉拔强度相接近,分别达到2.15MPa和2.20 MPa,远高于第3种方案的0.7 MPa,3种方案的常温层间剪切强度分别达到0.565 MPa,0.145 MPa和0.745 MPa;采用Overlay tester系统进行抗反射裂缝性能试验,3种方案的疲劳寿命分别为4587次、5649次和2856次;3种方案的渗水系数均较小,其中第2种方案渗水系数接近于0 mL/min;GA-10的抗水损坏性能优于AC-10。因此,GA-10+环氧树脂撒砂结构综合性能最优,可作为沉管隧道混凝土路面沥青保护层方案。
In order to meet the special requirements for asphalt protection layer of immersed tunnel concrete pavement,three kinds of asphalt protection layer of AC-10+asphalt roll,GA-10+epoxy resin with sand and AC-10+stress absorbing layer are designed,and laboratory tests on the bonding performance between layers,performances of reflective cracking resistance,waterproofing and water damage resistance are conducted based on demonstration and analysis.The results show that the pull strengths between layers under normal temperature of the former two design schemes reach 2.15 MPa and 2.20 MPa respectively,being much higher than that of the third design scheme;the shear strengths between layers under normal temperature of the three design schemes reach 0.565 MPa,0.145 MPa and 0.745 MPa respectively;the fatigue lives of the three design schemes are 4587 times,5649 times and 2856 times given by reflective cracking resistance performance test using Overlay tester system;water permeability coefficients of the three design schemes are all relatively small and the water permeability coefficient of the second scheme is close to 0 mL/min;water damage resistance performance of GA-10 is better than that of AC-10.It is concluded that the design scheme of GA-10+epoxy resin with sand has the best performance and can be considered as the preferred scheme of asphalt protection layer for the immersed tunnel.
作者
赵国云
吴卫华
李书亮
ZHAO Guoyun;WU Weihua;LI Shuliang(Chongqing Zhixiang Paving Technology Engineering Co.,Ltd.,Chongqing 400060;Highway Survey and Design Institute of Transportation Bureau of Handan City,Handan 056004;Hong Kong-Zhuhai-Macao Bridge Authority,Zhuhai 519060)
出处
《现代隧道技术》
EI
CSCD
北大核心
2020年第6期142-148,共7页
Modern Tunnelling Technology
基金
广东省交通科技项目(科技-2017-02-016)
重庆市科技项目(cstc2018jscx-msybX0300).
关键词
沉管隧道
沥青保护层
室内试验
层间粘结性能
抗反射裂缝性能
防水性能
抗水损坏性能
Immersed tunnel
Asphalt protection layer
Laboratory test
Bonding capacity between layers
Reflecting cracking resistance performance
Waterproofing performance
Water damage resistance performance
