Embedded Discrete Fracture Networks to Analyze Groundwater Inflows during Tunnel Drilling
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional de Colombia
2022
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| _version_ | 1876469538519777280 |
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| author | Adriana Piña |
| author_facet | Adriana Piña |
| contents | Embedded Discrete Fracture Networks to Analyze Groundwater Inflows during Tunnel Drilling Adriana Piña Diego Cortés Leonardo David Donado Daniela Blessent Ingeniería tunnel numerical modeling groundwater inflows Discrete fracture networks Tunnels commonly go through fracture zones, which are analyzed as an equivalent porous medium with homogeneous permeability. However, this is a rough simplification that overlooks the connection triggered by underground works in fractured massifs. This study introduces the use of synthetic discrete fracture networks (DFN) to analyze groundwater inflows through tunnel excavation in a fractured zone while considering the daily advance of the drilling front. First, a hypothetical case with six different settings, varying fracture length and density, as well as aperture distribution, was analyzed. Each setting had about 100 realizations. DFN hydraulic properties were estimated and compared with previous DFN studies, displaying the same behavior even though the magnitude of the estimated parameters differed. As an application example, structural measurements of the Alaska fault zone in the La Línea massif (Colombia) were used to obtain the statistical parameters of fracture length and aperture distributions to generate the DFN. Five settings were built, obtaining measured and simulated groundwater inflows of the same order of magnitude. These results highlight the potential of synthetic discrete fracture networks to analyze the effects of tunnel construction on groundwater flow. 2022 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64379877005 https://www.redalyc.org/journal/643/64379877005/ https://www.redalyc.org/journal/643/64379877005/html/ https://www.redalyc.org/journal/643/64379877005/64379877005.epub https://www.redalyc.org/journal/643/64379877005/movil 10.15446/ing.investig.v42n1.89889 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.1 Vol.42 |
| format | Artículo científico |
| id | redalyc_64379877005 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Embedded Discrete Fracture Networks to Analyze Groundwater Inflows during Tunnel Drilling Adriana Piña Ingeniería tunnel numerical modeling groundwater inflows Discrete fracture networks Embedded Discrete Fracture Networks to Analyze Groundwater Inflows during Tunnel Drilling Adriana Piña Diego Cortés Leonardo David Donado Daniela Blessent Ingeniería tunnel numerical modeling groundwater inflows Discrete fracture networks Tunnels commonly go through fracture zones, which are analyzed as an equivalent porous medium with homogeneous permeability. However, this is a rough simplification that overlooks the connection triggered by underground works in fractured massifs. This study introduces the use of synthetic discrete fracture networks (DFN) to analyze groundwater inflows through tunnel excavation in a fractured zone while considering the daily advance of the drilling front. First, a hypothetical case with six different settings, varying fracture length and density, as well as aperture distribution, was analyzed. Each setting had about 100 realizations. DFN hydraulic properties were estimated and compared with previous DFN studies, displaying the same behavior even though the magnitude of the estimated parameters differed. As an application example, structural measurements of the Alaska fault zone in the La Línea massif (Colombia) were used to obtain the statistical parameters of fracture length and aperture distributions to generate the DFN. Five settings were built, obtaining measured and simulated groundwater inflows of the same order of magnitude. These results highlight the potential of synthetic discrete fracture networks to analyze the effects of tunnel construction on groundwater flow. 2022 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64379877005 https://www.redalyc.org/journal/643/64379877005/ https://www.redalyc.org/journal/643/64379877005/html/ https://www.redalyc.org/journal/643/64379877005/64379877005.epub https://www.redalyc.org/journal/643/64379877005/movil 10.15446/ing.investig.v42n1.89889 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.1 Vol.42 |
| title | Embedded Discrete Fracture Networks to Analyze Groundwater Inflows during Tunnel Drilling |
| topic | Ingeniería tunnel numerical modeling groundwater inflows Discrete fracture networks |
| url | https://www.redalyc.org/articulo.oa?id=64379877005 https://www.redalyc.org/journal/643/64379877005/ https://www.redalyc.org/journal/643/64379877005/html/ https://www.redalyc.org/journal/643/64379877005/64379877005.epub https://www.redalyc.org/journal/643/64379877005/movil |