Carbonation resistance zonation of reinforced concrete lining of road tunnels

被引：0

作者：

Han X.-B. ^{[1
]}

Ye F. ^{[1
]}

Liang X.-M. ^{[1
]}

Feng H.-L. ^{[1
]}

Wang L. ^{[1
]}

Xia Y.-X. ^{[1
]}

机构：

[1] Chang'an University, School of Highway, Xi'an

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2021年 / 55卷 / 08期

关键词：

Carbonation; Durability; Operating environment; Reinforced concrete lining; Road tunnel; Zonation;

D O I：

10.3785/j.issn.1008-973X.2021.08.004

中图分类号：

学科分类号：

摘要：

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". © 2021, Zhejiang University Press. All right reserved.

引用

页码：1436 / 1443and1463

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