Displacement monitoring, displacement verification and stability assessment of the critical sections of the Konak tunnel, Izmir, Turkey

Date

2020-07-01

Author

Yertutanol, Kadir
Akgün, Haluk
Sopaci, Evrim

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

260
views

0
downloads

The main focus of this study is vertical displacement monitoring and verification along with preliminary support design for the four geotechnical sectors of the twin tube Konak tunnel that was constructed in a highly populated area in Izmir. The displacements of the tunnel that were obtained through numerical analysis were verified by comparing them with the displacements obtained by construction monitoring. In the study area, volcanics, pyroclastics and some sedimentary deposits (sandstone, mudstone and conglomerate) often intertongue with each other especially in the exit portal area. The accurate estimation of the shear strength and deformation parameters of these units is important for the displacement predictions and for the assessment of tunnel stability. Rock mass classification systems, namely, RMR, Q system and GSI have been employed to obtain the rock mass shear strength and deformation parameters along with performing empirical tunnel support design. Numerical analysis has been performed by using the finite element analysis for assessing tunnel support design and for predicting the vertical displacements at five different measurement points around the tunnel periphery and in the four geotechnical sectors of the tunnel.

Subject Keywords

Geotechnical Engineering and Engineering Geology, Building and Construction

URI

https://hdl.handle.net/11511/36414

Journal

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY

DOI

https://doi.org/10.1016/j.tust.2020.103357

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

Engineering geological investigations and the preliminary support design for the proposed Ordu Peripheral Highway Tunnel, Ordu, Turkey Sopaci, Evrim; Akgün, Haluk (Elsevier BV, 2008-01-07) This paper presents engineering geological investigations and the tunnel support design for the Boztepe tunnel of the Ordu Peripheral Highway located in northeast Turkey. In order to characterize the rock masses in Boztepe Tunnel which mainly consist of flysch (mostly alternation of sandstone, marl and siltstone) and pyroclastics (agglomerate and tuff), engineering geological investigations have been carried out in three stages as surface, subsurface and laboratory investigations. Rock mass classification s...
Engineering geological investigations along the Iliksu Tunnels, Alanya, southern turkey Koçkar, Mustafa Kerem; Akgün, Haluk (Elsevier BV, 2003-03-01) The main objective of this study is to assess the engineering geological characteristics of the rock mass and to suggest appropriate support recommendations along the two autoroad tunnel projects, named as Iliksu 1 and lliksu 2, which are located along the Antalya-Alanya Highway. The study area consists of pelitic schist and calc schist overlain by a thick sequence of recrystallized limestone and an intercalation of pelitic schist, calc schist and graphite schist. The tunnel ground support types and categor...
Methodology for tunnel and portal support design in mixed limestone, schist and phyllite conditions: a case study in Turkey Koçkar, Mustafa Kerem; Akgün, Haluk (Elsevier BV, 2003-02-01) The purpose of this study is to present a methodology for tunnel and support design in mixed limestone, schist and phyllite conditions through investigating two highway tunnel case studies that are located along the Antalya-Alanya Highway in southern Turkey. The main lithologies of the project area are regularly jointed, recrystallized limestone and the weak lithologies of the schist unit (i.e., pelitic schist, calc schist, graphitic phyllite and alternations of these lithologies). A detailed geological and...
Experimental evaluation of geomembrane/geotextile interface as base isolating system Kalpakci, V.; Bonab, A. T.; Özkan, M. Yener; Gülerce, Zeynep (Thomas Telford Ltd., 2018-02-01) The objective of this study is to evaluate the effect of the geomembrane/geotextile interface on the seismic response of small-to-moderate height structures. Three building models with first-mode natural frequencies changing between 2-4 Hz (representing two, three and four storey structures) were tested with and without the addition of geomembrane/geotextile interface using the shaking table test setup by employing harmonic and modified/ scaled ground motions. Experimental results showed that the geomembran...
Seismic retrofitting of bridges by response modification techniques based on altering bearing fixities Dicleli, Murat (Informa UK Limited, 2005-07-01) Feasibility of a proposed seismic retrofitting technique for typical bridges in the Central US has been studied. The retrofitting technique is based on modifying the fixity conditions of the bearings for response modification purposes to eliminate the need for costly retrofitting of substructures. For this purpose, a seismically vulnerable bridge, typical of those in the Central US was selected. Detailed seismic analyses of the bridge were then conducted. It was found that its bearings, wing-walls and pier ...

Citation Formats

K. Yertutanol, H. Akgün, and E. Sopaci, “Displacement monitoring, displacement verification and stability assessment of the critical sections of the Konak tunnel, Izmir, Turkey,” TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36414.