Engineering geological investigations and the preliminary support design for the proposed Ordu Peripheral Highway Tunnel, Ordu, Turkey

Date

2008-01-07

Author

Sopaci, Evrim
Akgün, Haluk

Metadata

Show full item record

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

Item Usage Stats

188
views

0
downloads

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 systems (Geomechanics Classification System, RMR; Norwegian Geotechnical Institution Q-system and Geological Strength Index, GSI) have been utilized through information obtained from engineering geological investigations. Sixteen boreholes with a total length of 1497 m have been drilled to assist and verify rock mass classifications. Approximately seventy five rock samples have been obtained for rock mechanics tests. The information provided from all the engineering geological investigation stages has been handled in the characterization of the rock masses at the tunnel elevation. In an attempt to check the validity of empirical tunnel supports of the various rock mass classification systems, stress analysis around the tunnel opening has been executed by the 2D finite element analysis program, Phase 2 where rock mass data obtained through the rock mass classification systems have been utilized as input data. In these analyses, the empirically proposed support systems have been found to be successful to prevent further deformations around the tunnel openings.

Subject Keywords

Geotechnical Engineering and Engineering Geology, Geology

URI

https://hdl.handle.net/11511/42129

Journal

ENGINEERING GEOLOGY

DOI

https://doi.org/10.1016/j.enggeo.2007.09.005

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

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...
Geotechnical rock-mass evaluation of the Anamur dam site, Turkey Ozsan, A; Karpuz, Celal (Elsevier BV, 1996-03-01) This paper describes a feasibility-level geotechnical evaluation carried out at Anamur dam site, in terms of stability analysis of dam foundation, excavation slopes and a diversion tunnel. The proposed Anamur dam will be built across the Anamur river on the Alanya metamorphic series which consists of phyllite, schist and slate units at the site. Geotechnical investigations included drilling for core, pumping tests, sampling for laboratory testing, and a detailed discontinuity survey.
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...
Displacement monitoring, displacement verification and stability assessment of the critical sections of the Konak tunnel, Izmir, Turkey Yertutanol, Kadir; Akgün, Haluk; Sopaci, Evrim (Elsevier BV, 2020-07-01) 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 co...
Support capacity estimation of a diversion tunnel in weak rock Ozsan, A; Basarir, H (Elsevier BV, 2003-03-01) This paper presents the results of the support capacity estimation for the diversion tunnel of the Urus dam site in highly weathered tuff and weak zone. Tunneling in weak rock requires some special considerations, since misjudgment in support design results in costly failures. There are several ways of estimating rock support pressure and selecting support. However, all systems suffer from their characteristic limitations in achieving objectives. Thus, it is more useful to use different methods for estimati...

Citation Formats

E. Sopaci and H. Akgün, “Engineering geological investigations and the preliminary support design for the proposed Ordu Peripheral Highway Tunnel, Ordu, Turkey,” ENGINEERING GEOLOGY, pp. 43–61, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42129.