IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2018  > Vol15 No.1
Assessments on slope instabilities triggered by engineering excavations near a small settlement (Turkey)
TUNCAY Ergün
Corresponding AuthorTUNCAY Ergün
2018-01
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume15Issue:1Pages:114-129
Subtype期刊论文
AbstractIn this study, the mechanisms of slope instabilities triggered by engineering excavations at location of a planned tunnel portal in the northwest region of Turkey were assessed, and stability of the current slopes which has impacts on safety of a settlement (village) and agricultural fields was investigated. In the first stage of the study, in order to identify the geological units and structural properties of the sedimentary rocks in the area, to clarify the mechanisms of instabilities and to characterize discontinuity and rock mass properties field works were conducted. In this content, geotechnical boreholes, geophysical explorations between the boreholes, line surveys to explore discontinuity properties, preparation of slope profiles using topographical techniques and sampling of rock blocks and discontinuity planes were performed. In the second stage, laboratory tests were carried out on the samples to determine the geomechnical properties of the slope forming materials and discontinuities. Then, back analyses of the instabilities were made to assess the responsible shear strength parameters of the geological units during failures by considering laboratory shear test results too. Based on the back-analyses of the failures, the strength properties of the slope debris were estimated, and it has been clarified that the residual shear strength properties are the factors controlling slip mechanism along the beddings. Following the stability analyses, it is understood that a further instability along the mass or bedding planes in the failed and redesigned area are not expected, if the current slope geometry is not changed. However, safety factor calculated for the slope in the debris is 1.1 which is well below the recommended value in the literature. The minimum safety factor for currently stable slopes which were cut at the eastern part of the failed area is 1.22 which is also less than that suggested in literature. Some remedial measures such as mini-pile or slope flattening are suggested after analyses to increase the factor of safety for this part below the settlement.
KeywordSlope Instability Back-analysis Remedial Measures
DOI10.1007/s11629-017-4718-z
Indexed BySCI
Language英语
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20786
CollectionJournal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.1
Recommended Citation
GB/T 7714
TUNCAY Ergün. Assessments on slope instabilities triggered by engineering excavations near a small settlement (Turkey)[J]. Journal of Mountain Science,2018,15(1):114-129.
APA TUNCAY Ergün.(2018).Assessments on slope instabilities triggered by engineering excavations near a small settlement (Turkey).Journal of Mountain Science,15(1),114-129.
MLA TUNCAY Ergün."Assessments on slope instabilities triggered by engineering excavations near a small settlement (Turkey)".Journal of Mountain Science 15.1(2018):114-129.
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