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浙江大学学报(工学版)
Journal of ZheJiang University (Engineering Science)  2021, Vol. 55 Issue (8): 1436-1443    DOI: 10.3785/j.issn.1008-973X.2021.08.004
    
Carbonation resistance zonation of reinforced concrete lining of road tunnels
Xing-bo HAN(),Fei YE*(),Xiao-ming LIANG,Hao-lan FENG,Lei WANG,Yong-xu XIA
Chang’an University, School of Highway, Xi’an 710064, China
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Abstract  

The optimistic model was decided by comparing results from carbonation depth calculation models and tested data, in order to establish a quantitative method for the carbonization durability design of highway tunnel lining. The relationship of temperature and humidity between the tunnel operation environment and the atmosphere was analyzed based on the field test data. The temperature and humidity zonation of road tunnels in China was established based on the temperature and humidity data from meteorological stations. The calculation method of CO2 volume fraction in the tunnel operation environment was recommended by referring to the emission source of CO2 as well as the field test data. The carbonation durability of road tunnels in China was divided based on the principle of equalized carbonation degradation rate gradient. Also, the specific method of quantitative design of carbonation durability of road tunnel lining in China was recommended based on the results of the zonation. Results show that the environmental humidity of the tunnel is equivalent to the atmospheric humidity. The temperature trend of the tunnel environment is consistent with that of the atmospheric environment, and the average values of the two are close. The CO2 volume fraction in the road tunnel is linearly related to the CO volume fraction. The lining of tunnels built in the Yunnan and Guizhou are greatly affected by the environment. The impact of carbonation can be ignored for tunnels in Tibet, Qinghai, Inner Mongolia, Heilongjiang and Jilin. The carbonation durability design of the tunnel lining in other areas of the country can refer to the design of the classification “lightness” in “Standard for design of concrete structure durability”.

Key words： road tunnel      reinforced concrete lining      carbonation      operating environment      durability      zonation     
Received: 27 July 2020      Published: 01 September 2021
CLC:  U 451.4  
Fund:  国家自然科学基金资助项目（51878060）；中国博士后科学基金面上资助项目（2020M683398）；长安大学中央高校基本科研业务费专项资金资助项目（300102210124）
Corresponding Authors: Fei YE     E-mail: xingbo.han@chd.edu.cn;xianyefei@126.com
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Xing-bo HAN
Fei YE
Xiao-ming LIANG
Hao-lan FENG
Lei WANG
Yong-xu XIA
Cite this article:

Xing-bo HAN,Fei YE,Xiao-ming LIANG,Hao-lan FENG,Lei WANG,Yong-xu XIA. Carbonation resistance zonation of reinforced concrete lining of road tunnels. Journal of ZheJiang University (Engineering Science), 2021, 55(8): 1436-1443.

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https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2021.08.004     OR     https://www.zjujournals.com/eng/Y2021/V55/I8/1436


公路隧道钢筋混凝土衬砌碳化耐久性区划

为了构建公路隧道衬砌碳化耐久性的定量设计方法，对比各碳化深度计算模型与实测数据，选定衬砌碳化的最优模型；根据实测数据分析隧道环境温湿度与洞外大气关系，基于全国气象监测站的温湿度数据，建立公路隧道运营环境温湿度区划；考虑公路隧道CO2的释放源项并参照实测数据，构建隧道运营环境CO2体积分数的计算方法；以碳化劣化速率梯度相等为原则，对我国隧道碳化环境进行分区，结合分区推荐我国公路隧道衬砌碳化耐久性定量设计的具体方法. 研究发现：隧道环境湿度与大气湿度相当，隧道环境温度变化趋势与大气环境一致，两者均值接近. 公路隧道内部CO2体积分数与CO体积分数呈线性关系. 云南、贵州区修建的隧道工程衬砌受环境影响较大，西藏、青海、内蒙古、黑龙江、吉林等地区的待建隧道在进行衬砌耐久性设计时可以忽略碳化影响，其余全国大面积区域隧道衬砌的碳化耐久性设计可以对应《混凝土结构耐久性设计标准》中环境作用等级中的“轻度”进行设计.


关键词： 公路隧道,  钢筋混凝土衬砌,  碳化,  运营环境,  耐久性,  区划 
Fig.1 Comparison of carbonation depth of theoretical model and fieldtest data
Fig.2 Regulations of environmental factors on carbonation depth
Fig.3 Inner and outer temperature of Wafangdian tunnel
Fig.4 Inner and outer temperature of Jiaozhou bay road tunnel
Fig.5 Inner and outer temperature of Zuomutai tunnel
Fig.6 Inner and outer humidity of Jiaozhou bay road tunnel
Fig.7 CO2 emission factors for each type of vehicle
Fig.8 Correlation analysis of density field test data of CO and CO2
碳化环境作用等级 隧道内部环境特征
与作用程度 		主要分布行政区域
0 碳化寿命为120 a以上，100 a碳化深度为55 mm以下，可与级别A对应 内蒙古东北部、黑龙江北部、新疆吐鲁番、青海格尔木小部区域
1 碳化寿命为100~120 a，100 a碳化深度为55~60 mm，可与级别A对应 内蒙古北部、黑龙江、吉林、辽宁东部、西藏、青海、四川北部
2 碳化寿命为80~100 a，100 a碳化深度为60~67 mm，可与级别B对应 内蒙古西部、甘肃、宁夏、陕西、山西、辽宁西部、新疆、湖南、安徽、江苏、浙江、重庆、江西、福建、西藏南部
3 碳化寿命为60~80 a，100 a碳化深度为67~77 mm，可与级别B对应 新疆西部及中部、河南北部、河北南部、北京、山东中西部、四川、广西、广东、台湾、海南
4 碳化寿命为40~60 a，100 a碳化深度为77~95 mm，可与级别C对应 贵州南部、云南
5 碳化寿命为40 a以下，100 a碳化深度为95 mm以上，可与级别C对应 云南、贵州、四川交界部位
Tab.2 Environmental characteristics and extent of action of each durability grade
Fig.9 Relationship between carbonation life span and carbonation depth
级别 作用程度 级别 作用程度
A 可忽略 D 严重
B 轻度 E 非常严重
C 中度 F 极端严重
Tab.1 Grade of environmental action
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