Modeling of Groundwater Regime Changes that may be Caused by Building of Transportation Tunnel in Riga, Latvia

Journal of Communication and Computer 2012
Aivars Spalviņš, Jānis Šlangens, Inta Lāce

The publication is devoted to numerical modeling of changes in groundwater regime that may happen during and after building of the 7 km long and 50 metres deep underground transportation tunnel in Riga. There are two kinds of changes: the ones caused by the tunnel impermeable body and by harmful effects that may happen during the process of building, for example, impacts of open deep construction trenches. To estimate possible after effects caused by the tunnel and the trenches, the hydrogeological model has been created. Its plane size is 3500metre8000metres and the plane approximation step is 10 metres. Model contains twelve grid planes accounting for complex geological structure of the place and the tunnel geometry. By comparing results provided by the undisturbed (no tunnel) and disturbed models, the change of the groundwater regime was found. It contained changes of groundwater heads and flows as hydraulic gradients and meteoric infiltration. These changes were small and the tunnel itself should cause practically no disturbance of groundwater regime. By modeling possible versions of watertight walls for trenches, it was found that deep wrongly built construction trenches may cause considerable harm by lowering groundwater table at the trench surroundings

Spalviņš, A., Šlangens, J., Lāce, I. Modeling of Groundwater Regime Changes that may be Caused by Building of Transportation Tunnel in Riga, Latvia. Journal of Communication and Computer, 2012, Vol.9, No.11, 1218.-1225.lpp. e-ISSN 1930-1553. ISSN 1548-7709.

Publikācijas valoda
English (en)