Assessment of discontinuous rock slope stability with block theory and numerical modeling: a case study for the South Pars Gas Complex, Assalouyeh, Iran

2017-06-01
AZARAFZA, Mohammad
ASGHARI-KALJAHI, Ebrahim
Akgün, Haluk
In this study, a geotechnical model has been used to analyze the stability of a discontinuous rock slope. The main idea behind block theory is that it disregards many different combinations of discontinuities and directly identifies and considers critical rock blocks known as "key blocks". The rock slope used as a case study herein is situated in the sixth phase of the gas flare site of the South Pars Gas Complex, Assalouyeh, Iran. In order to analyze the stability of discontinuous rock slopes, geotechnical modeling which was divided into geometrical sub-modeling and mechanical sub-modeling has been utilized. This model has been established upon the KGM (key-group method) algorithm which was based on the limit equilibrium method and block theory and prepared and coded by the Mathematica software. According to the results of the stability analysis, the analyzed slope was determined to be in the category of "needs attention," and the security level, calculated through the FORM (first-order reliability method) analysis, was estimated to be 1.16. In order to verify the model, the results obtained from the model were compared with those of the UDEC software, which is a numerical method based on distinct components. As a conclusion, it was determined that the results of the model agreed well with those of the numerical method.
ENVIRONMENTAL EARTH SCIENCES

Suggestions

Engineering geological characterization of the Antalya karstic rocks, southern Turkey
Sopacı, Evrim; Akgün, Haluk (Springer Science and Business Media LLC, 2016-03-01)
This study encompasses engineering geological characterization of the Antalya karstic foundation rocks, particularly tufa, whose mechanical behavior is highly variable. The Antalya tufa rock has no well-developed discontinuity systems. It is variably porous, and is composed of different rock types with variable structures. To reveal the engineering geological parameters and to develop a thorough engineering geological database, which is not available in the literature for the Antalya tufa rock, geological o...
Spatial distribution of some elements and elemental contamination in the sediments of Koycegiz Lake (SW Turkey)
Gulsen-Rothmund, Halil Ibrahim; Avsar, Ozgur; Avşar, Ulaş; Kurtulus, Bedri; Tunca, Evren (Springer Science and Business Media LLC, 2018-07-01)
Elemental accumulation, distribution and relationship profiles for sediment samples taken at 81 localities in the Koycegiz Lake were investigated. Spatial distribution maps for ten elements (Cu, Pb, Zn, Ni, Cr, Co, Mn, Mo, Al, Fe) were created using the ordinary kriging interpolation method. Statistical tests revealed that the sediments taken from areas close to the Namnam (NamSM) and Kargicak (KarSM) stream mouths have the highest element content. In addition, sediments close to NamSM have the highest cont...
Modeling the response of top-down control exerted by gelatinous carnivores on the Black Sea pelagic food web
Oguz, T; Ducklow, HW; Purcell, JE; Malanotte-Rizzoli, P (American Geophysical Union (AGU), 2001-03-15)
Recent changes in structure and functioning of the interior Black Sea ecosystem are studied by a series of simulations using a one-dimensional, vertically resolved, coupled physical-biochemical model. The simulations are intended to provide a better understanding of how the pelagic food web structure responds to increasing grazing pressure by gelatinous carnivores (medusae Aurelia aurita and ctenophore Mnemiopsis leidyi) during the past 2 decades. The model is first shown to represent typical eutrophic ecos...
Assessment of slope stability for a segment (km: 25+600-26+000) of Antalya-Korkuteli highway
Arıkan, Huriye Aslı; Topal, Tamer; Department of Geological Engineering (2010)
The cut slopes at a segment between Km 25+600 and 26+000 of the Antalya-Burdur Breakaway-Korkuteli State Road to be newly constructed have slope instability problems due to the existence of highly jointed limestone. The purpose of this study is to investigate the engineering geological properties of the units exposed at three cut slopes, to assess stability of the cut slopes, and to recommend remedial measures for the problematic sections. In this respect, both field and laboratory studies have been carried...
Assessment of core-filter configuration performance of rock-fill dams under uncertainties
Çalamak, Melih; Yanmaz, Ali Melih (American Society of Civil Engineers (ASCE), 2018-04-01)
Probabilistic analyses are conducted for seepage through a rock-fill dam having two different core-filter configurations: one sloping and the other a central symmetrical core-filter arrangement. Uncertainties in core and filter are considered, assuming their hydraulic conductivities as random variables. For this purpose, finite-element software used for groundwater flow and seepage analyses is coupled with a random-number-generation algorithm. Monte Carlo simulations are performed for probabilistic seepage ...
Citation Formats
M. AZARAFZA, E. ASGHARI-KALJAHI, and H. Akgün, “Assessment of discontinuous rock slope stability with block theory and numerical modeling: a case study for the South Pars Gas Complex, Assalouyeh, Iran,” ENVIRONMENTAL EARTH SCIENCES, pp. 0–0, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46523.