Groundwater characterization of a heterogeneous granitic rock massif for shallow tunneling
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universitat de Barcelona
2012
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876437607141867520 |
|---|---|
| author | J. FONT-CAPÓ |
| author_facet | J. FONT-CAPÓ |
| contents | Groundwater characterization of a heterogeneous granitic rock massif for shallow tunneling J. FONT-CAPÓ E. VAZQUEZ-SUÑÉ J. CARRERA I. HERMS Ciencias de la Tierra zone Fault Inflow Modeling Shallow tunneling Shallow tunneling may encounter a number of problems, the most important of which is high water inflows in transmissive areas that are often associated with fractures or discontinuities. Moreover, research into shallow tunneling may be limited by the duration and cost of the civil engineering works. Two important aspects that are often overlooked are: variable groundwater behavior of faults (conduit, barrier, conduit barrier), and role of groundwater connectivity between fractures that cross the tunnel and the rest of the rock massif. These two aspects should be taken into account in the geological and groundwater characterization to correct the tunnel design and minimize hazards. A geological study and a preliminary hydrogeological characterization (including a prior steady state investigation and cross bore-hole tests) were carried out in a granitic sector during the construction of Line 9 of the Barcelona subway (B-20 area). The hydrogeological conceptual model was constructed using a quasi-3D numerical model, and different scenarios were calibrated. Faults and dikes show a conduit barrier behavior, which partially compartmentalized the groundwater flow. The barrier behavior, which is the most marked effect, is more prominent in faults, whereas conduit behavior is more notable in dikes. The characterization of groundwater media entailed a dewatering plan and changes in the tunnel course. This enabled us to construct the tunnel without any problems. 2012 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50524834005 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.10 |
| format | Artículo científico |
| id | redalyc_50524834005 |
| institution | Redalyc |
| language | en |
| publishDate | 2012 |
| publisher | Universitat de Barcelona |
| spellingShingle | Groundwater characterization of a heterogeneous granitic rock massif for shallow tunneling J. FONT-CAPÓ Ciencias de la Tierra zone Fault Inflow Modeling Shallow tunneling Groundwater characterization of a heterogeneous granitic rock massif for shallow tunneling J. FONT-CAPÓ E. VAZQUEZ-SUÑÉ J. CARRERA I. HERMS Ciencias de la Tierra zone Fault Inflow Modeling Shallow tunneling Shallow tunneling may encounter a number of problems, the most important of which is high water inflows in transmissive areas that are often associated with fractures or discontinuities. Moreover, research into shallow tunneling may be limited by the duration and cost of the civil engineering works. Two important aspects that are often overlooked are: variable groundwater behavior of faults (conduit, barrier, conduit barrier), and role of groundwater connectivity between fractures that cross the tunnel and the rest of the rock massif. These two aspects should be taken into account in the geological and groundwater characterization to correct the tunnel design and minimize hazards. A geological study and a preliminary hydrogeological characterization (including a prior steady state investigation and cross bore-hole tests) were carried out in a granitic sector during the construction of Line 9 of the Barcelona subway (B-20 area). The hydrogeological conceptual model was constructed using a quasi-3D numerical model, and different scenarios were calibrated. Faults and dikes show a conduit barrier behavior, which partially compartmentalized the groundwater flow. The barrier behavior, which is the most marked effect, is more prominent in faults, whereas conduit behavior is more notable in dikes. The characterization of groundwater media entailed a dewatering plan and changes in the tunnel course. This enabled us to construct the tunnel without any problems. 2012 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50524834005 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.4 Vol.10 |
| title | Groundwater characterization of a heterogeneous granitic rock massif for shallow tunneling |
| topic | Ciencias de la Tierra zone Fault Inflow Modeling Shallow tunneling |
| url | https://www.redalyc.org/articulo.oa?id=50524834005 |