NDLI: Warsaw line II metro extension: TBM excavation under historical buildings in urban environment

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Warsaw line II metro extension: TBM excavation under historical buildings in urban environment

Content Provider	Scilit
Author	Minno, M. Capata, V. Grosso, T.
Copyright Year	2019
Description	The TBM excavation for the Eastern extension of the Warsaw line II metro has been completed in January 2018 by Astaldi/Gulermak joint venture. Excavation involved mainly fine and medium sands below water table which created a challenging environment for Earth Pressure Balance (EPB) TBM works. In order to reduce settlements at ground level for selected historical buildings, ground improvement was carried out through permeation grouting with the aim at reducing volume loss during excavation and inducing an initial heave of the buildings. Also, high-standard TBM performance was achieved with the use of bentonite and polymers, specific grout mix and controlled face and grout pressures. Extensive monitoring was carried out through manual and automatic measurements and results showed small movements of the buildings and very small damage. This paper is aimed at describing the challenges faced for the TBM excavation, the adopted solutions and the most relevant results. Book Name: Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art
Related Links	https://api.taylorfrancis.com/content/chapters/edit/download?identifierName=doi&identifierValue=10.1201/9780429424441-625&type=chapterpdf
Ending Page	5922
Page Count	10
Starting Page	5913
DOI	10.1201/9780429424441-625
Language	English
Publisher	Informa UK Limited
Publisher Date	2019-04-17
Access Restriction	Open
Subject Keyword	Book Name: Tunnels and Underground Cities: Engineering and Innovation Meet Archaeology, Architecture and Art Transportation Science and Technology Buildings Tbm Excavation Extension Warsaw Historical
Content Type	Text
Resource Type	Chapter

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