A Proposed Method for Drawing the Great Circle Representing Dip Angle and Strike Changes

Kıncal, Cem; Koca, Mehmet Yalçın

doi:10.2113/gseegeosci.15.3.145

Cited by 15 publications

(4 citation statements)

References 17 publications

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“…In kinematic analysis, internal friction angle is used as data from slope geometry and shear strength parameters of discontinuities. These analyses can be used where failures in rock slopes are controlled by discontinuities [28][29][30]. Possible failure types (planar, wedge type, and tipping type failures) in rock slopes can be determined by kinematic analysis.…”

Section: Rockfall Potential Of the Study Areamentioning

confidence: 99%

Evaluation of the Performance of Gabion Walls as a High-Energy Rockfall Protection System Using 3D Numerical Analysis: A Case Study

Angın,

Karahasan

2024

Applied Sciences

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Cases of rockfalls that occurred on a slope in the Selendi District of Manisa Province are evaluated in this article. Field studies are evaluated and different measures are examined to reduce rockfall risk. Drone flights are used to evaluate previous studies and obtain 1/1000 scale digital topographic maps. These maps are used to create a 3D (three-dimensional) solid model of the project site, and on-site surveys are conducted to identify source rock locations and free blocks that pose a risk. Those 3D analyses are used to determine the paths, jump heights, and energies of the blocks in motion. The data from the 3D maps are used to determine the most appropriate remediation methods. The structural behavior of the recommended gabion wall, which is designed at a certain height and width as a result of rockfalls, has been examined. Structural behavior is determined by simulation based on the finite element model. Within the scope of this study, the ANSYS Workbench program is used. The “Explicit Dynamics” analysis type in ANSYS Workbench was chosen to examine the rockfall effect.

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Section: Rockfall Potential Of the Study Areamentioning

confidence: 99%

Evaluation of the Performance of Gabion Walls as a High-Energy Rockfall Protection System Using 3D Numerical Analysis: A Case Study

Angın,

Karahasan

2024

Applied Sciences

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“…The Bornova Melange, which overlies the basement rocks in the Izmir region, underwent intense tectonic deformation during and after sedimentation (Erdogan, 1990;Kincal, 2005;Kincal and Koca, 2009;Koca, 1995). Neogene sedimentary rocks discordantly overlie the Bornova Melange rocks.…”

Section: Geology and Geotechnical Properties Of Soils In The Study Areamentioning

confidence: 99%

Effect of local soil conditions on dynamic ground response in the southern coast of Izmir Bay, Turkey

Kuruoglu

Eskişar

2015

Russian Geology and Geophysics

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The city of Izmir, located at the western end of Turkey, has experienced many strong earthquakes throughout its history. The southern coast of Izmir Bay, one of the most densely populated areas of Izmir, is located on deep alluvial sediments. It is important to determine the effect of local soil conditions on dynamic ground response in the study area, where thick loose water-saturated alluvial sediments exist. A database including geotechnical and geological information on the study area is constructed. Majority of the site is classified as D and E according to NEHRP provisions. Dynamic site response analyses are performed with EERA by utilizing the field and laboratory test results and earthquake time histories of moderate-scale earthquakes such as 1977 Izmir (M L = 5.3), 2003 Urla (M d = 5.6), and 2005 Uzunkuyu-Urla (M L = 5.9), which occurred in and nearby Izmir. In addition, a scenario ground motion generated by the Izmir Fault with a magnitude of 6.5, having an average distance of 10 km to the study area, is also considered. The output data obtained from the dynamic site response analyses are evaluated, and maps displaying variation in dynamic parameters on ground surface are prepared for the southern coast of Izmir Bay, Turkey. Consequently, the dynamic analyses performed with the soil models constituted for the study area verified the damage occurred in a close distance event of 1977 Izmir earthquake. The scenario earthquake resulted in peak ground accelerations more than 0.6g at the eastern and western ends of the study area. However, long distance events resulted in spectral amplifications by up to 5 times. With this study, it is emphasized that local soil conditions should be evaluated individually in the area of interest. Generation of a site-specific design spectrum is recommended for the areas located on deep alluvial sediments.

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“…The substratum of the construction area consists of sandstone/shale alternations (Koca & Kıncal, 2004;Kıncal, 2005;2009); the sandstones outcrop with high-angle slopes; the shales have lower slope angles (10-20°). There are also some volcanic rocks.…”

Section: Engineering Problemsmentioning

confidence: 99%

Large-scale land-suitability mapping in the GIS environment for the construction site of the University Olympic Village in Izmir (Turkey)

Kıncal¹,

Koca²,

Loon³

2009

Geologos

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Participants of the 23rd University Olympic Games held in Izmir (Turkey) were hosted in a Universiade Olympic Village that had to be newly constructed. A risk analysis has been performed to assess potential engineering problems at the envisaged construction site. The risk analysis was largely based on a new, large-scale land-suitability map that was prepared in the GIS environment with much detail for this type of construction work. Information was collected from several maps, in combination with mapping in the field, drilling and seismic data. Geological, geotechnical, geophysical and morphological data were then superimposed on these analyses. This sequence of overlay analyses was performed with the help of GIS software (MapInfo Professional 7.5); this resulted in five hazard maps. Risk points (1-11) were then attributed to the different zones in the five digital hazard maps. A land-suitability map indicating the suitability for envisaged constructional activities was subsequently obtained in the form of an overlay of the five hazard maps, thus allowing to calculate a total risk for each zone on this map. The land-suitability map that was thus obtained, has been prepared for a 1:1,000 scale development plan; such a large scale is uncommon in this context.

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A Proposed Method for Drawing the Great Circle Representing Dip Angle and Strike Changes

Cited by 15 publications

References 17 publications

Evaluation of the Performance of Gabion Walls as a High-Energy Rockfall Protection System Using 3D Numerical Analysis: A Case Study

Evaluation of the Performance of Gabion Walls as a High-Energy Rockfall Protection System Using 3D Numerical Analysis: A Case Study

Effect of local soil conditions on dynamic ground response in the southern coast of Izmir Bay, Turkey

Large-scale land-suitability mapping in the GIS environment for the construction site of the University Olympic Village in Izmir (Turkey)

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