Assesment of the Enclosing Wall for Preventing of Ground Dewatering caused by Building of Underground Construction in the Town Riga, Latvia
Hydrogeology and Water Resources: 19th International Multidisciplinary Scientific GeoConference (SGEM 2019) 2019
Aivars Spalviņš, Kaspars Krauklis, Inta Lāce

In order to erect an underground construction, it is necessary to drain its trench by pumping out groundwater. If information on hydrogeological data of the place and on the trench are available then it is possible to estimate, by using modelling, the necessary pumping rate and to compute lowering of groundwater head at the trench surroundings (depression cone) developed by the pumping. There ground dewatering happens that may cause subsidence of buildings and streets and to worsen life of plants. For this reason, the dewatering must be considerably minimized. It can be done by enclosing the trench by a watertight wall. In the town Riga, a many storied house will be built. It includes underground floors that can be created only in the drained trench. To find the wall depth and permeability, the detailed hydrogeological model (HM) has been built (size 400m×400m, 7 layers, plane approximation step 0.5m). To run HM, the commercial software Groundwater Vistas 6 was applied. The impact of the most probable failures of the wall was investigated. The original methodology of modelling has been applied. It may of interest for modelers dealing with finding of depression cones caused by groundwater withdrawals.


Atslēgas vārdi
hydrogeological model, depression cone, watertight wall
DOI
10.5593/sgem2019/3.1/S12.008
Hipersaite
https://www.sgem.org/index.php/elibrary?view=publication&task=show&id=5605

Spalviņš, A., Krauklis, K., Lāce, I. Assesment of the Enclosing Wall for Preventing of Ground Dewatering caused by Building of Underground Construction in the Town Riga, Latvia. No: Hydrogeology and Water Resources: 19th International Multidisciplinary Scientific GeoConference (SGEM 2019), Bulgārija, Albena, 30. jūn.-6. jūl.., 2019. Sofija: STEFF92 Technology Ltd., 2019, 57.-64.lpp. ISBN 978-9934-18-381-2. ISSN 1314-2704. Pieejams: doi:10.5593/sgem2019/3.1/S12.008

Publikācijas valoda
English (en)
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