Case Study on Rock Slope Failures Caused by Geologic Structures

Boo Seong Park; Hyun Cho; Dong In Park; Jun Ho Kim; Jae Ho Choi

doi:10.9720/kseg.2017.4.417

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Research Article

Case Study on Rock Slope Failures Caused by Geologic Structures 지질구조 영향에 의한 암반비탈면 붕괴 사례 연구

December 2017. pp. 417-427

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Abstract

This study aims to present cases of rock slope failures caused by geological structures. Status of slope failures, results of cause analysis and stabilizing methods are introduced, focusing primarily on rock slope failures caused by specific geologic structures, such as intersection of faults infilled with clay, foliation and fault shear zone by dike intrusion and deep-seated clayey layer along lithologic boundary. Detailed geological survey, geophysical exploration and boring survey were conducted for cause analysis. Stabilizing method to prevent further slope failures and to ensure long-term stability of slopes were established, considering characteristics of geological structures, types of failure and geological conditions.

Keywords

Rock slope failure

Geologic structure

Detailed geological survey

Geophysical exploration

Stabilizing methods

본 연구에서는 암반비탈면을 대상으로 붕괴에 큰 영향을 미치는 주요 지질구조에 의한 붕괴현황, 원인분석 및 대책에 관한사례를 소개하고자 한다. 다양한 지질구조에 의한 암반비탈면 붕괴 사례 중 단층점토가 협재된 단층면의 교차에 의한 붕괴, 엽리 및 암맥관입접촉부 파쇄대에 의한 붕괴 및 심부 암종경계면(점토대)에 의한 붕괴 등에 대한 사례를 중심으로 정밀지표지질조사, 물리탐사 및 시추조사 등을 통한 붕괴원인 분석을 실시하였으며, 대상 비탈면의 지질구조적 특성, 붕괴유형 및 지반조건 등을 고려하여 추가적인 비탈면 활동을 방지하고 비탈면의 항구적인 안정성 확보를 위한 대책방안을 수립하고자 하였다.

키워드

암반비탈면 붕괴

지질구조

정밀지표지질조사

물리탐사

대책방안

References

Baek, Y., Kim, G. W., and Koo, H. B., 2000, Slope stability associated with construction, The Journal of Engineering Geology, 10(2), 1-17 (in Korean with English abstract).

Chung, H. S. and You, B. O., 1996, Failure Types in Rock Slopes According to Geological Characteristics, Journal of the Korean Geotechnical Society, 12(6), 37-49 (in Korean with English abstract).

Lee, C. S. and Lee, B. W., 2007, Cases of Slope Failures and Stabilizing Measures, Proceedings of KSEG Spring Conference, 2007(1), 18-21 (in Korean).

Park, B. S., Cho, H., Cha, S. H., and Lee, K. H., 2006, Case Study on the Causes for the Failure of Large Scale Rock Mass Slope Composed of Metasedimentary Rocks, The Journal of Korean Society for Rock Mechanics, 16(6), 506-525 (in Korean with English abstract).

Park, B. S., Cho, H., Youn, S. P., and Lee, S. H., 2011, Case Study on Stability Analysis of Phyllite Rock Slopes in National Road Construction, International Journal of Geo-Engineering, 3(3), 41-52.

Park, B. S., Cho, H., and Youn, S. P., 2013, Case Study on Stability Analysis and Countermeasures of Landslide along Deep-seated Geological Boundary, In Proceedings of The 6th Japan-Korea Joint Symposium for Landslide Disaster Mitigation, Nagano, Japan, 66-77.

You, B. O., 2002, Assumption of Shear Strength on Failed Discontinuities Due to Back Analysis, Proceedings of KGS Fall National Conference, Seoul, Korea, 213-227 (in Korean).

Information

Publisher :Korean Society of Engineering Geology
Publisher(Ko) :대한지질공학회
Journal Title :The Journal of Engineering Geology
Journal Title(Ko) :지질공학
Volume : 27
No :4
Pages :417-427
Received Date : 2017-11-10
Revised Date : 2017-12-27
Accepted Date : 2017-12-27
DOI :https://doi.org/10.9720/kseg.2017.4.417

The Journal of Engineering Geology ISSN:1226-5268(Print) 2287-7169(Online) 지질공학

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