Compensation of CH4 emissions during tunneling works in Asturias: A proposal with benefits both for local councils and for the affected population

Rodríguez-Montañés, R.; Díaz-Aguado, María B.; Lombardía, Cristobal

doi:10.1016/j.jenvman.2012.03.020

Cited by 7 publications

(6 citation statements)

References 23 publications

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“…The excavation of a tunnel can produce the emission of gasses initially trapped in the rock mass, such as methane, and this is directly linked to the excavation process [21]. These emissions have an environmental impact that must be quantified in the project stage.…”

Section: Costs Related To the Geological Gas Emissionsmentioning

confidence: 99%

“…These emissions have an environmental impact that must be quantified in the project stage. In the case of methane, it should be transformed into its carbon dioxide equivalent [21,44] for cost determinations (Equation ( 25)), as follows:…”

Section: Costs Related To the Geological Gas Emissionsmentioning

confidence: 99%

“…The potential entrapment, with an average of 30 days, would have a total fixed cost of EUR 900,000. The geological formation could also contain methane (CH4), with a potential emission of approximately 11 m 3 of methane for every ton of material excavated, based on previous studies [21], with a total of 1,562,000 m 3 of CH4 and, therefore, 25,000 tCO2. Considering the price of each ton of CO2 at the time of the tunnel's excavation (EUR 14 per t), the associated economic risk related to the methane emissions would be approximately EUR 350,000.…”

Section: Pajares Variant Lot 3 Tunnelmentioning

confidence: 99%

“…This fact creates an important remaining uncertainty that can influence the total cost of a tunnel and the finishing deadline due to low excavation performance [17] or TBM entrapments [18], among other setbacks. It also leads to potential problems in terms of the physical stability of the construction and environmental and safety issues [8,[19][20][21][22][23]. Therefore, it is crucial to define a general and flexible system for analyzing costs in the construction phase of a tunnel and, therefore, reduce the uncertainty of the project whenever possible [24].…”

Section: Introductionmentioning

confidence: 99%

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Directional Core Drilling as an Approach to Reduce Uncertainty in Tunneling Construction

Rodríguez,

Fernández,

Bascompta

et al. 2023

Applied Sciences

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The definition of a rock mass’s characteristics is crucial in underground construction to avoid delays and cost overruns. This study proposes a system to quantify the economic uncertainty related to a lack of knowledge of a rock mass in the tunnel construction stage, either for tunnel boring machines or for drill and blast excavation techniques. Using a back-analysis of three actual tunnels completed in Spain (Burata, Lot 3 of the Pajares variant, and Bolaños), the study assessed the directional core drilling technique (DCD) for this purpose, comparing it with conventional boreholes. In this regard, the DCD approach reduced the uncertainty by between EUR 6.7 and EUR 12.7 for every EUR 1, while the total cost of the drilling campaign remained within a widely accepted proportion of the construction budget. Overall, the uncertainty was reduced by approximately EUR 6000 per meter of the tunnel.

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Section: Costs Related To the Geological Gas Emissionsmentioning

confidence: 99%

Section: Costs Related To the Geological Gas Emissionsmentioning

confidence: 99%

Section: Pajares Variant Lot 3 Tunnelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Directional Core Drilling as an Approach to Reduce Uncertainty in Tunneling Construction

Rodríguez,

Fernández,

Bascompta

et al. 2023

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…When methane concentration is within the ranges of 5 -15% in the presence of ignition source such as flame or spark there will be an explosion. For this reason scientists have tried for years to diminish the hazards in underground spaces (Rodriguez et al, 2012). Methane density proportion to air is at about 0.55 and it is characterized based on some physical properties such as having no smell and no taste.…”

Section: Methane Gas Emissionmentioning

confidence: 99%

Problems of Mechanized Tunneling In Gassy Ground Conditions a Case Study: Nousoud Water Transmission Tunnel

Tali

Lashkaripour

Ghafoori

et al. 2014

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Current advances in science, followed by development of excavation equipments technology resulted in growth of tunnelling projects for different purposes. In spite of conducting exploratory studies prior to these projects, in some cases due to of impassable paths, the studies are limited to certain areas. Hence, during geotechnical studies, it is possible that all problems facing tunnelling not be detected. Therefore, lack of awareness of these conditions can result in a lack of proper planning and consequently lead to problems during the projects. Due to the lack of knowledge and consequently not predicting and planning the projects, drilling of the second sector of Nousoud water transmission tunnel, -26 km long- has been faced with many problems including emission of hydrogen sulfide and methane gas and drainage of high volumes of water containing dissolved gas into the tunnel, which has led to the loss of life, loss of working efficiency, as well as increased project costs. In this study, problems occurred in this project, reasons behind them will be addressed; and the solutions to these problems will be mentioned. The results of the study have shown that oil-bearing formations of the region and the immigration of gases coming from these formations have let the gas entered into the tunnel. In addition, due to the high solubility of hydrogen sulfide and methane gas in water on one hand, and hydrated formations with high permeability on the other hand, caused the influx of large quantities of water and therefore the concentration of these gases in the tunnel.

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Assessment of H2S emission hazards into tunnels: the Nosoud tunnel case study from Iran

Morsali

Rezaei

2017

Environ Earth Sci

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Compensation of CH4 emissions during tunneling works in Asturias: A proposal with benefits both for local councils and for the affected population

Cited by 7 publications

References 23 publications

Directional Core Drilling as an Approach to Reduce Uncertainty in Tunneling Construction

Directional Core Drilling as an Approach to Reduce Uncertainty in Tunneling Construction

Problems of Mechanized Tunneling In Gassy Ground Conditions a Case Study: Nousoud Water Transmission Tunnel

Assessment of H2S emission hazards into tunnels: the Nosoud tunnel case study from Iran

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