• Title/Summary/Keyword: Cut-slope

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Application of Navigation System on the Cut Slope Management (네비게이션을 이용한 절토사면 데이터 관리 시스템 (Slope-Navi) 구현)

  • Bae, Sang-Woo;Bautista, Ferdinand E.;Koo, Ho-Bon;Lee, Yun-Rae
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.09a
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    • pp.1274-1281
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    • 2010
  • Cut Slope Management System(CSMS) is a systematic maintenance and management system designed to prevent the collapse of cut slopes located along national roads and to minimize damages caused by slope collapse related accidents. In order to implement a maintenance and management system that will ensure safe road operation, the Korean government has started the inventory of cut slopes and developed a cut slope database since 2006. The study on the application of cut slope database is on-going and part of this study is the development of cut slope database management system (Slope-navi) using GIS technology and navigation system for the effective and efficient cut slope management using Information Technology. Using the Navigation Cut Slope Data Management System the previously developed database was checked and verified. The converted cut slope inventory data and field investigation reports of about 20,000 cut slopes were loaded in the navigation map. Through the development of the navigation's cut slope data search system, a systematic and efficient cut slope database management and operation in the prevention of slope collapse and remedial measure selection was established.

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A Case Study on Slope Failure by Excessive Under Cut (절토사면 하부의 과도한 굴착에 따른 붕괴 사례 연구)

  • Rhee, Jong-Hyun;Kim, Seung-Hyun;Koo, Ho-Bon
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.03a
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    • pp.1154-1160
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    • 2009
  • Cut slope failure is happened in various form by several causes. In this study, we searched causes of cut slope failure shortly, and we made a study of slope failure by excessive under cut. Under cutting slope does to add unstability. Thereby, cut slope failure can be happened on a large scale.

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Objective Evaluation method for the Condition of Cut-slope (절토사면의 객관적인 상태평가 연구)

  • 장현식;박혁진;장범수
    • Proceedings of the Korean Geotechical Society Conference
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    • 2003.06a
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    • pp.33-42
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    • 2003
  • Since the cut slope has been big concern due to frequent failures, the government decided to include cut slopes in the“Act for Safety Control of Public Structures”. Based on the Act, the cut slope whose height is over 50m and length is over 200m should be inspected on the regular basis. According to the Act, KISTEC developed the objective evaluation method for the condition of cut slope. The evaluation method is divided into two categories: evaluation for damaged condition and evaluation for failure affecting factor. Based on the evaluation results, the cut slope is graded from A to E. In this study, the process to evaluate the cut slope condition and the evaluation criteria to divide the grade of cut slope are introduced.

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Slope Navigation based on the Cut Slope Data Management System (내비게이션 기반 절토사면 데이터 관리시스템)

  • Bae, Sang-Woo;Kim, Seung-Hyun;Lee, Jong-Hyun;Koo, Ho-Bon;Lee, Yun-Rae
    • Journal of Korean Society for Geospatial Information Science
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    • v.18 no.4
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    • pp.71-77
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    • 2010
  • Cut Slope Management System(CSMS) is a systematic maintenance and management system designed to prevent the collapse of cut slopes located along national roads. In order to implement safe road operation system, KICT has started the inventory of cut slopes and developed a cut slope database since 2006. Cut slope database management system using GIS technology and navigation system was developed as a Information Technology application. Through the Cut Slope Navigation System(SLOPE-Navi.), the previously developed database was checked and verified. The converted cut slope inventory data and field investigation data of 28,707 cut slopes were loaded on the navigation map. We consider that the Cut Slope Navigation Management System can be useful as in-situ system, which can be systematic and effective DB management and operation to prevent cut slope collapses and establish a remedial countermeasure as mitigation concerning disasters.

Development of the Forest Road Cut-slope Rehabilitation Techniques Using Gabion Systems with Vegetation Base Materials (식생기반재 돌망태를 이용한 임도비탈면 복원기술 개발)

  • Park, Jae-Hyeon;Jeong, Yong-Ho;Choi, Hyung-Tae
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.11 no.5
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    • pp.92-103
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    • 2008
  • Development of new approaches to achieve naturally good ecological potential of forest road cut-slope by making the best use of advantages of gabion systems with vegetation base materials to prevent slope failure and erosion, in the area with highly erodible soil. As a result on the type analysis of gabion systems already installed in road cut-slopes, gabion systems were generally established to prevent slope failure. Existing gabion systems can be divided into monolithic and modular system and can be divided into ten subtypes according to the purpose of establishment and combination of other measures. As a result on the monitoring of erosion amount from forest road cut-slopes in the test applications, the order of erosion amount from largest to smallest is as follows : the curved road cut-slope site where normal gabion system was established ($7,911cm^3$); the control site ($7,632cm^3$); the straight road cut-slope site where normal gabion system was established ($7,301cm^3$); the curved road cut-slope site where the new gabion system was established ($5,684cm^3$); and the straight road cut-slope site where the new gabion system ($5,325cm^3$). Therefore, the result shows that the new gabion system is more effective than the normal gabion system to reduce erosion amount from forest ! road cut-slopes. During the study period, vegetation coverages of the straight and curved road cut-slope site where the new gabion system was established were about 45% and about 36%, so average vegetation coverage of the sites where the new gabion systems was established was higher than the sites where the normal gabion systems was established. Therefore, it was concluded that the new gabion system can be more effective for cut-slope revegetation.

Design Method for Stability in Cut-Slope under heavy rainfall (집중호우를 고려한 절토사면의 안정성 확보를 위한 설계방안)

  • 이풍희;김종흔;전경수
    • Proceedings of the Korean Geotechical Society Conference
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    • 2002.10a
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    • pp.16-26
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    • 2002
  • As the slope designs had simply followed some slope guidelines during 1960's∼1970's, of which the main purpose was to estimate earth work quantities in the feasibility stage, slope failures had been experienced in Korea Highways. Various site investigation methods for highway cut-slopes have been continuously developed, and major cut-slope failures caused by slope instability have rapidly reduced. The failure mode of recent cut-slope failures in highways during typhoon RUSA No.15. featured a debris flow in soil mass activated by flowing water. The study of the surface soil scour and the debris flow caused by heavy rainfall must be done to protect the cut-slope failures in the future

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A Study on conclusion about inventory survey on cut slope along national roads in Korea (국내 국도변 비탈면 현황 분석 연구)

  • Park, Jae-Young;Shin, Chang-Gun;Jang, Bum-Su
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.09a
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    • pp.722-726
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    • 2010
  • Inventory survey is process collecting data about cut slope. It's different from inspection. It contains not only basic information about cut slope, especially location, GPS positioning, height, length, weathering, joint direction, water conditions but also level of danger and damage. Collected data are being used get at status about cut slope along national roads. And It helps judging about priority of detailed investigation. According to results of analysis, we found better method about maintenance of cut slope. Later on, if inventory research is finished, we will understand characteristics of collapse slopes.

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A Study on the Infiltration Characteristics of Soil Cut-Slope (토사절토사면의 침투특성에 관한 연구)

  • Lee, Jeong-Yeob;Koo, Ho-Bon;Kim, Seung-Hyun;Bae, Gyu-Jin
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.735-738
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    • 2005
  • The purpose of this study is the infiltration characteristics of soil cut-slope by rainfall. Stability analysis of soil cut-slopes has been conducted by limit equilibrium method on Seep/w and finite element method on Slope/w. Result is same as following. First. the hour when seepage line and groundwater in contact is proportionate from rainfall rate condition and upper natural slope gradient condition which is identical. Second, when seepage line and groundwater is contact, seepage line moves gradually at soil cut-slope surface. Finally, seepage line is formed similarly with soil cut-slope gradient. Third, when rainfall is ended, from the recording upper natural slope where the hour will pass it is stabilized

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Case Histories of Rock Slope Failure and Restoration (암반사면의 붕괴와 극복사례)

  • Ro, Byung-Don;Park, Wan-Seo
    • 한국방재학회:학술대회논문집
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    • 2007.02a
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    • pp.505-508
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    • 2007
  • Usually, cut-slope is the term that call rock slope. Therefore, the cause of instability of cut-slope is influenced generally in lithological and structure geological qualities including weathering disintegration. Through the several case studies, we could confirm that stabilization countermeasure also should be based in geological properties.

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A Study on the effect of slope inclination and rainfall in current cut soil slope design criteria (국내 절토 비탈면 설계기준 적용시 사면경사와 강우조건의 영향 연구)

  • La, You-Sung;Kim, Bum-Joo
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.03a
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    • pp.1264-1270
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    • 2010
  • In this study, the effects of slope inclination and rainfall on weathered soil slope stability were investigated for current cut soil slope design criteria. A series of slope stability analysis was performed on the slopes with the same height (5m), but different inclinations (1:0.8, 1:1, 1:1.2, 1:1.5, 1:2). Seepage analysis was also conducted to examine the rainfall effects directly and compare the combined seepage and slope stability analysis results with the slope stability analysis results for rainy season from the current cut soil slope design criteria. Typical properties for weathered soils were used in both the slope and seepage analysis. The analysis results showed that, for the slopes much steeper than the standard slopes, the factor of safety criteria were satisfied. Therefore, it appears that the slope designs by current cut soil slope design criteria lead to conservative results.

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