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ASSESSMENT OF THE ENCLOSING WALL FOR PREVENTING OF GROUND DEWATERING CAUSED BY BUILDING OF UNDERGROUND CONSTRUCTIONS IN THE TOWN RIGA, LATVIA

A. P. Krauklis

First published: 2019-06-20https://doi.org/10.5593/sgem2019/3.1/s12.008View metrics

Abstract

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.

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Title
ASSESSMENT OF THE ENCLOSING WALL FOR PREVENTING OF GROUND DEWATERING CAUSED BY BUILDING OF UNDERGROUND CONSTRUCTIONS IN THE TOWN RIGA, LATVIA
Authors
A. P. Krauklis
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th International Multidisciplinary Scientific GeoConference SGEM2019, Water Resources. Forest, Marine and Ocean Ecosystems
Publisher
STEF92 Technology
Year
2019
Pages
57-64
SWS Citekey
Spalvins2019125764
ISSN
1314-2704
ISBN
978-619-7408-81-2
Language
en
Publication type
Conference Paper
Keywords
hydrogeological modeldepression conewatertight wall.
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