Emission transition of greenhouse gases with the surrounding rock weakened – A case study of tunnel construction

Xu, Jianfeng; Guo, Chun; Chen, Xiaofeng; Zhang, Zhenhua; Yang, Lu; Wang, Mingnian; Yang, Kun

doi:10.1016/j.jclepro.2018.10.224

Cited by 33 publications

(9 citation statements)

References 17 publications

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“…Furthermore, the recommended design parameters of tunnel lining under different surrounding rock grades were introduced (27,28). Based on the JTG/T 3832-2018 Highway Engineering Budget Quota (29), the JTG/T 3833-2018 Highway Engineering Machinery Shift Cost Quota (30), and emission factors from local literature (25,31), the emission level of unit engineering quantity was calculated. Finally, the influence of design parameters on the GHG emissions of the tunnel was evaluated.…”

Section: Methodsmentioning

confidence: 99%

“…Huang et al (24) evaluated the GHG emissions from the drilling and blasting excavation of a standard Norwegian tunnel and considered the influence of tunnel size and length on emission levels. Xu et al (25) found that surrounding rock conditions indirectly affect the input of material and energy into tunnel lining designs to control tunnel construction emission levels. Xu et al (26) analyzed the GHG emissions from 49 tunnel construction cases; they found that factors such as rock mass grade, excavation area, and burial depth affected the emissions from tunnel construction and they proposed a prediction method for the GHG emissions.…”

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confidence: 99%

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Influence of Lining Design Parameters on the Greenhouse Gas Emissions of Chinese Highway Tunnel Construction

Dong

Guo

et al. 2021

Transportation Research Record: Journal of the Transportation R

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To realize low-carbon design for tunnel construction, the authors explored the relationship between tunnel design and greenhouse gas (GHG) emissions. This study proposed typical design models of Chinese highway tunnels based on the lining design specifications and engineering design cases. The research modified the GHG emission calculation method based on the standard quota system. The marginal GHG emissions caused by a change of design parameters of tunnel lining were determined. The results show that the emissions from shotcrete, concrete arch wall, system bolts, and steel frames are sensitive to the change of design parameters, while steel mesh is not. As the design thickness increases, the emissions of the concrete arch wall, inverted arch, and shotcrete increase approximately linearly. The emission distributions of system bolts and steel frames under different spacing are given. Under the same longitudinal spacing condition, the emission ratio of I18 and I16 steel frames is 1.197, and that of I16 and I14 steel frames is 1.316. By defining the marginal emissions caused by the change of design parameters, this study carried out basic work for highway tunnel low-carbon designs. The research is of strategic significance for achieving energy conservation and emission reduction in the tunnel industry.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Influence of Lining Design Parameters on the Greenhouse Gas Emissions of Chinese Highway Tunnel Construction

Dong

Guo

et al. 2021

Transportation Research Record: Journal of the Transportation R

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“…This paper defined 'the relative distribution of firing processes in emission increment', shown in Equation ( 15). (15) ...where a F i ,F j ,m represents the ratio of emission during the firing process of different models, E F i ,m is the gas emission of firing Fi from model m, E F j ,m is the gas emission of firing Fj from model m, m ∈ {m1, m2, m3} = {Swedish model, NTNU model, China model}. The relative contribution of each firing process from three models was shown in Table 6.…”

Section: Emission Per Areamentioning

confidence: 99%

“…The CO and NOx emissions leap from the low emission level to a high level. Xu et al [15] described the phenomenon as an "emission transition paths" in the study of GHG emission evaluation of tunnels. The relative contribution of each firing process from three models was shown in Table 7.…”

Section: Emission Transition Pathmentioning

confidence: 99%

“…To date, researchers have extensively studied on toxic fumes from underground blasting operations. Xu et al, [15] mentioned the impact of explosives on the environment in the study of greenhouse gas emissions of a highway tunnel. Huang et al, [16] suggested that the improvement of blasting efficiency and reduction of explosive consumption can remarkably reduce the environmental impacts.…”

Section: Introductionmentioning

confidence: 99%

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Emission Characteristics of CO and NOx from Tunnel Blast Design Models: a Comparative Study

Chen¹,

Qiu²,

Rai³

et al. 2021

Pol. J. Environ. Stud.

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A large number of toxic gases such as carbon monoxide (CO) and nitrogen oxides (NOx) are produced from the blast models during the drill and blast tunneling excavation. However, the emission characteristics of blast design models have never been mentioned in previously published studies.To acquire the cleanest blast model and reduce environmental pollution, this paper for the first time compares the emission characteristics of CO and NOx from three traditional blast design models, i.e., NTNU, Swedish, and China models, which is the most used in tunneling. Firstly, the detailed blasting parameters of three models are put forward based on one certain 42.3m 2 cross-section tunnel. After that, the emission characteristics of each model is evaluated based on the indexes of total emission, emissions per area, and emission increment. Meanwhile, the tunnel face of the models is divided into four functional sections, i.e. cut zone, stoping zone, lifter zone, and contour zone to explore the influence of functional blastholes on gas emissions. Finally, these results indicate that the CO and NOx emissions of the China model are the least, followed by Swedish and NTNU models. And the total emissions are dominated by the stoping blastholes. Therefore, it is effective to reduce environmental pollution by adjusting the parameters of the stoping zone. This research can provide a reference for the tunnel engineers to design blast models to reduce environmental pollution.

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Introduction

Guo

2021

Carbon Emission Calculation Methods for Highway Tunnel Construction

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Emission transition of greenhouse gases with the surrounding rock weakened – A case study of tunnel construction

Cited by 33 publications

References 17 publications

Influence of Lining Design Parameters on the Greenhouse Gas Emissions of Chinese Highway Tunnel Construction

Influence of Lining Design Parameters on the Greenhouse Gas Emissions of Chinese Highway Tunnel Construction

Emission Characteristics of CO and NOx from Tunnel Blast Design Models: a Comparative Study

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