• 한국지리정보학회지
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• 제15권2호
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• pp.1-11
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• 2012

지구 환경 변화에 따른 폭우로 절토 사면 붕괴가 해마다 발생하고 인명과 경제적 손실이 증가하고 있다. 이는 절토 사면의 붕괴의 평가를 요구한다. 경사면이 절토 시행 전에 시뮬레이션 된다면, 절토 사면의 붕괴를 예측 할 수 있고, 붕괴 사고 시 복구 비용을 최소화 할 수 있다. 본 논문은 절토 사면에서 중요한 경사도의 시뮬레이션 방법을 나타낸다. 이것은 패트리넷을 이용하여 모델링되며 디자인되고, ArcGIS를 이용하여 윈도우 XP 환경에서 구현하고자 한다. 그래서 본 논문은 GIS를 이용한 절토와 간척을 시뮬레이션 함으로써 시간과 돈을 절약하는데 기여할 것이다.

• 산업기술연구
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• 제24권B호
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• pp.107-116
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• 2004

This thesis is results of experimental works on the behavior of the cut-and-cover tunnel. Centrifuge model tests were performed to simulate the behavior of the cut-and-cover tunnels having cross sections of national road and subway tunnels. Model experiments were carried out with changing the cut slope and the slope of filling ground surface. Displacements of tunnel lining resulted from artificially accelerated gravitational force up to 40g of covered material used in model tests, were measured during centrifuge model tests. In model tests, Jumunjin Standard Sand with the relative density of 80 % and the zinc plates were used for the covered material and the flexible tunnel lining, respectively. Basic soil property tests were performed to obtain it's the property of Jumumjin Standard Sand. Shear strength parameters of Jumunjin Standard Sand were obtained by performing the triaxial compression tests. Direct shear tests were also carried out to find the mechanical properties of the interface between the lining and the covered material. Compared results model tests estimation with respect to displacements of the lining.

• 산업기술연구
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• 제23권A호
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• pp.119-130
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• 2003

This thesis is results of experimental works on the behavior of the cut-and-cover tunnel. Centrifuge model tests were performed to simulate the behavior of the cut-and-cover tunnels having cross sections of national road and subway tunnels. Model experiments were carried out with changing the cut slope and the slope of filling ground surface. Displacements of tunnel lining resulted from artificially accelerated gravitational force up to 40g of covered material used in model tests, were measured during centrifuge model tests. In model tests, Jumunjin Standard Sand with the relative density of 80 % and the zinc plates were used for the covered material and the flexible tunnel lining, respectively. Basic soil property tests were performed to obtain it's the property of Jumumjin Standard Sand Shear strength parameters of Jumunjin Standard Sand were obtained by performing the triaxial compression tests. Direct shear tests were also carried out to find the mechanical properties of the interface between the lining and the covered material. Compared results model tests estimation with respect to displacements of the lining.

• Ocean and Polar Research
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• 제27권3호
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• pp.277-288
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• 2005

Spatial distribution and vertical structures of water masses around the Antarctic continental margin are described using synthesized hydrographic data. Antarctic Surface Water (AASW) over the shelf regime is distinguished from underlying other water masses by the cut-off salinity, varying from approximately 34.35 to 34.45 around Antarctica. Shelf water, characterized by salinity greater than the cut-off salinity and potential temperature less than $-17^{\circ}C$, is observed on the Ross Sea, off George V Land, off Wilkes Land, the Amery Basin, and the Weddell Sea, but in some shelves AASW occupies the entire shelf. Lower Circumpolar Deep Water is present everywhere around the Antarctic oceanic regime and in some places it mixes with Shelf Water, producing Antarctic Slope Front Water (ASFW). ASFW, characterized by potential temperature less than about $0^{\circ}C$ and greater than $-17^{\circ}C$, and salinity greater than the cut-off salinity, is found everywhere around Antarctica except in the Bellingshausen-Amundsen sector. The presence of different water masses over the Antarctic shelves and shelf edges produces mainly three types of water mass stratifications: no significant meridional property gradient in the Bellingshausen and Amundsen Seas, single property gradient where ASFW presents, and a V-shaped front where Shelf Water exists.

• 한국환경복원기술학회지
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• 제9권6호
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• pp.133-142
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• 2006

Occasionlly, a lot of plants withered on the marine upheaval soil, because of the potential acid sulfate soil. It was necessary to investigate the chemistry of soil, before planting on Ulsan-Jungjadong cut-slope of road construction site. Cut-slope surface soils were sampled on the every varying points in soil colour and analyzed chemically. Germination status of seeds in sample soils was investigated such as Albizzia julibrissin, Festuca arundinacea. Relationship between germination status and chemistry of soil was analyzed. The results of investigation and analysis are as follows. 1. Germination of seeds was inhibited, less than pH($H_2O$ 1 : 5) 2.63. 2. Germination of seeds was inhibited, more than EC($H_2O_2$ 1 : 5) 13.4mS. 3. Germination of seeds was inhibited, more than aluminum ion content 2.0ppm in soil solution extracted by A$H_2O$ and 6.2ppm by $H_2O_2$. 4. pH($H_2O$ 1 : 5), EC($H_2O_2$ 1 : 5) and aluminum ion content proved chemical indicators of seed germination inhibition, in case of potential acid sulfate soil.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 가을 학술발표회 논문집
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• pp.527-534
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• 2000

136 cut slopes which extends from Namyangju to Chunchon city along the 46th national highway were investigated to analyze the influence factors affecting slope instability. Geologic and geotechnical conditions were examined and the detailed investigation were carried out for fifty five failed slopes. failure mode (wedge failure, planar failure, circular failure, sheet eroison and rock falls) are examined with respect to slope inclination, rock type, weathering grade and discontinuity patterns. It is suggested that the failure modes and their dimensions have relations to the morphology and geologic conditions of the slopes. Wedge failure has highest is the most frequent failure mode and falls, sheet erosions, planar failures and circular in descending order of failure percentage. Wedge failure is most dominant failure type over all lithology except quartzite formation. In slopes of well foliated and banded gneiss, failure ratio of wedge is up to 50% ca. Failure ratio(number of rock fall/number of total failure) of rock fall increases with increase fo slope inclinations and decrease of weathering grade. Dimension analyses of failed slopes shows wedge and circular failure has higher value of D/L and D/H than planar failure and sheet erosion.

• 한국터널지하공간학회 논문집
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• 제12권2호
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• pp.157-164
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• 2010

최근 아치슬래브를 이용한 새로운 반개착식 터널공법이 터널안정성 확보와 건설비용 감소, 환경훼손 최소화를 위해 적용되고 있다. 반개착식 공법은 원지반을 터널 천단아치부 까지만 굴착하고 아치형 구조물을 설치하여 복토한 후에 터널하반을 굴착하는 공법이다. 본 논문에서는 편경사 지역에서 반개착식으로 굴착 할 경우 편경사에 따른 아치슬래브의 거동을 실내모형실험으로 규명하였다. 연구결과, 아치슬래브의 거동은 원지반의 편경사 크기, 굴착심도, 굴착사면의 경사 및 기반암의 위치에 영향을 받는 것으로 나타났다. 아치슬래브의 측력은 전반적으로 압축력이 지배하나 편경사가 커질수록, 저지대에서 부분적으로 인장력이 발생하였다. 아치슬래브의 모멘트는 편경사가 증가할수록 고지대에서는 압축모멘트가 발생하며, 저지대에서는 인장모멘트가 발생하였다. 지점반력은 편경사가 커질수록 고지대에서는 증가하며, 저지대에서는 감소하여 좌우편차가 발생하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1994년도 학술발표집 신소재, 신기술에 의한 사면안정이론과 시공사례
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• pp.25-48
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• 1994

산이 많은 우리나라에서는 산지를 절개하여 주택단지나 도로를 개설하는 경우가 많이 있다. 일반적으로 절취사면은 얄은 토충과'그 아래 풍화도가 다른 암반으로 구성된다. 이러한 절취사면이 강우로 인해 붕괴되는 일이 가끔 발생하므로, 강우시의 유출과 지반 침투로 인해 활동가능성이 중대되는 원인을 이 논문에서 자세히 기술하였다. 또한 지질 공학적인 측면에서 불연속면의 발달을 상세히 조사하여 이것을 설계에 반영함으로서 더욱 합리적인 설계가 될 수 있다는 것을 강조하였다.

• 한국안전학회지
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• 제31권5호
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• pp.61-66
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• 2016

Many cut slopes are located along national roads, there were the collapse of cut slopes. In this study, the weights for condition evaluation of rock slopes was calculated using the entropy method and analytic hierachy process(AHP) method. The entropy analysis was performed using 95 cut slope data, and the AHP analysis was performed by a questionnaire to several expert. The weights based on analysis results were compared with evaluation weights of existing standard. As a result of this study, there was the difference of weights among the analytical methods. Later on, if this study's results is used to improvement current evaluation weights, it will be possible to perform the reliable condition evaluation.

• 지질공학
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• 제13권2호
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• pp.157-170
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• 2003

본 연구는 국도 건설을 위한 절개면 공사중 붕괴된 사면의 붕괴 원인을 분석하고 안정성 해석을 실시한 후 적절한 대책안을 제시하기 위해 수행되었다. 붕괴 절개면은 매산-가곡간의 국도 도로공사 구간의 일부로서 풍화암과 연암으로 구성되어 있으며 국내 시방서에 따라 시공이 완료된 상태에서 붕괴가 발생하였다. 풍화암과 연암의 지반상태에서 1:1.5의 경사를 가지는 절개면의 붕괴는 국내에서 흔히 발생하는 사례는 아니다. 본 연구에서는 절개면의 붕괴 원인을 분석하기 위하여 현장조사, 시추조사, 계측, 사면안정해석 등을 수행하였으며 이들 자료를 이용하여 조사대상 절개면의 장기적인 안정성 확보를 위한 대책 방안을 제안하였다. 또한, 사면내에 연약층 등이 협재 되어 있고 습곡이나 단층 등이 발달되어 있는 경우에는 불연속면의 방향이 절취면의 방향과 $^30{\circ}$이상 사교하고 있더라도 사면 붕괴가 발생할 가능성이 있으므로 절개면의 설계에는 이들 지질구조에 대한 고려가 반드시 포함되어야 한다.