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## Analysis of underground construction impact on the Warsaw Slope in Powiśle area

### Tomasz Dybciak

#### Abstract

In the thesis, the analysis of II Metro Line construction’s impact on the Warsaw Slope is presented. The construction cuts the Slope perpendicularly in the area of Dynasy Street 6, in Powiśle district. It is a crucial investment for rapidly growing Warsaw agglomeration and the first solution of this type applied to public transport in Poland, which is desired by other cities since it is a way of solving public transport problems. In order to analyse the tunnel construction’s influence on the Slope, an overview of archival materials linked with this area was made (results of surveying, geotechnical reports and cartographic compilations, e.g. Digital Terrain Model) as the first stage of the study. Next, the electrical resistivity tomography was made, which is one of the special surface geophysics techniques, in order to recognize groundwater conditions and a potential landslide surface or zone. In the third research stage, tacheometric measurements were made in several cycles according to the schedule of progressing works, which were tied to the archival geodetic observations’ results. The aim of the measurements was to determine the size and activity of the horizontal and vertical displacements. The next stage was inclinometer measurements, which aim was to check the horizontal displacements in different depths, as well as the assessment’s reliability enhancement of the metro tunnel construction’s influence on the analysed Slope’s stretch. In the first stage, landslide activity in the area of metro tunnel construction in the past was established. On the basis of the author’s own research and a number of publications (WYSOKIŃSKI, 2013; KACZMAREK i DOBAK, 2015), the most important factor influencing the slope stability (which is high slope angle of approximately 36o) was identified. This kind of morphology of the research area causes increased threat of landslide’s reactivation in the case of interactions with metro tunnel construction, resulting in horizontal and vertical (settlements) displacements of the researched area. The analysis of electrical resistivity tomography prospection indicates the lack of landslide surface. Due to prospection geological strata was designated, what can be used to make a correlation with potential changes in inclinometer’ observations. In the third stage, the quantities of vertical and horizontal displacements was obtained. Vertical quantities were up to 25 mm, whereas the horizontal were up to 16 mm. The chart presenting the position changes of the points controlled in time. Furthermore this results can be correlated with individual stages of the investement’s realization. A characteristic stage is the first TBM’s passage of the tunnel‘s southern part, which is directly under the slope. The next stage is the second TBM’s passage of the metro tunnel’s northern part. It is important that the author’s tachimetric measurements made in two cycles with an interval of 2,5 weeks indicate the stoppage of controlled points’ displacements. The last research stage was made with the use of inclinometer subsurface measurements indicated the lack of displacements below below the slope’s surface, near its lower edge. To sum up, it is claimed that the influence of II metro line’s construction below Warsaw Slope is visible because of the deformations. Nevertheless, this influence is so small that it does not pose a threat to slope’s stability, as well as the buildings in its neighborhood. The metro implementation’s influence assessment shows a high usefulness of complementary research methods, which allow for a broad and reliable analysis of investments’ implementation in complex urban conditions.
Diploma type
Engineer's / Bachelor of Science
Diploma type
Engineer's thesis
Author
Tomasz Dybciak (FGC) Tomasz Dybciak,, Faculty of Geodesy and Cartography (FGC)
Title in Polish
Wpływ realizacji tunelu II linii metra na skarpę Warszawską w rejonie Powiśla
Supervisor
Marek Woźniak (FGC/DEIS) Marek Woźniak,, Engineering Geodesy and Control Surveying Systems (FGC/DEIS)Faculty of Geodesy and Cartography (FGC)
Certifying unit
Faculty of Geodesy and Cartography (FGC)
Affiliation unit
Engineering Geodesy and Control Surveying Systems (FGC/DEIS)
Study subject / specialization
, Geodezja i Kartografia
Language
(pl) Polish
Status
Finished
Defense Date
14-01-2016
Issue date (year)
2016
Reviewers
Mieczysław Kwaśniak (FGC/DEIS) Mieczysław Kwaśniak,, Engineering Geodesy and Control Surveying Systems (FGC/DEIS)Faculty of Geodesy and Cartography (FGC) Marek Woźniak (FGC/DEIS) Marek Woźniak,, Engineering Geodesy and Control Surveying Systems (FGC/DEIS)Faculty of Geodesy and Cartography (FGC)
Keywords in Polish
pomiary tachimetryczne, tomografia elektrooporowa, II linia metra, Skarpa Warszawska, Powiśle.
Keywords in English
tacheometry, electrical resistivity tomography, II metro line, Warsaw Slope, Powiśle district
Abstract in Polish
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Kaczmarek&Dybciak_praca inzynierska.pdf
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Identyfikator pracy APD: 3786

Uniform Resource Identifier
https://repo.pw.edu.pl/info/bachelor/WUT0497200c0b134fa6977e4a87d3b2c266/
URN
urn:pw-repo:WUT0497200c0b134fa6977e4a87d3b2c266

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