• 한국초등과학교육학회지:초등과학교육
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• 제33권2호
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• pp.258-272
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• 2014

The purpose of this study is to investigate the perception on sedimentary rock in elementary science 'Earth and Space' domain for elementary school students. For this purpose, questionnaires on the sedimentary rock perception were developed. And the sedimentary rock perception was examined for random sampling of 5th and 6th grade 656 students. As a result, students chosen incorrect answers of the average 53.8% for questions of sedimentary rock perception. Over the average rate of incorrect answers in 18 questions were 10 questions (3 in the creation of sedimentary rock, 5 in the classification of sedimentary rock, 2 in the sedimentary layer). When the results were stratified by residence, grade and gender, there were significant differences in 8 questions between students in urban and rural areas, in 6 questions between 5th and 6th grade students, and in 3 questions between male and female students. The study that understanding of elementary students for sedimentary rock can be provided for form the master planning the teaching strategy to student's scientific concepts in elementary school. The results are also contributed to find an effective ways for modify misconceptions of sedimentary rock to the scientific concepts.

• 대한토목학회논문집
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• 제33권2호
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• pp.655-666
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• 2013

본 연구에서는 미고결 퇴적암을 통과하는 국내 최초 터널현장을 대상으로 시공현장의 시추코어를 이용하여 정량적인 슬레이크 내구성 시험과 점하중 강도시험을 통하여 미고결 퇴적암에 대한 정량적인 평가 방법을 제시하고 고결 정도에 따른 적절한 굴착 및 보강방법 등을 제안하고자 한다. 슬레이크 내구성 지수의 경우 3-cycle에서 변화량이 수렴되어 내구성을 구분하는 기준으로 $Id_3$ 값을 사용함이 합리적인 것으로 분석되었으며, 미고결 퇴적암의 $Id_3$ 평균값은 71.80, 점하중 시험결과 평균 일축압축강도 값은 10.8 MPa로 측정되었다. 실험 결과를 분석하여 일축압축강도, 고결상태, 막장확인, 습윤상태, 슬레이크 내구성 지수($Id_3$)를 포함하고 있는 미고결 퇴적암 터널 시공 시 적용 가능한 암반분류 기준을 제안하였다. 또한, 미고결 퇴적암 터널에 적합한 3가지 유형의 지보패턴을 제시하였고, 이는 시공 중인 터널의 내공변위 계측자료를 분석하여 적정성을 검토하였다.

• 한국지형학회지
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• 제28권1호
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• pp.1-12
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• 2021

This study tried to reveal relative surface denudation resistance and ranking by geologic types in the Southern Korean Peninsula using an 1:250,000 digital geologic map and ASTER GDEM. Among rock types such as igneous, sedimentary and metamorphic rocks, metamorphic rock showed the greatest resistance to surface denudation. The most resistant rock to surface denudation by geologic periods (e.g., the Precambrian, Paleozoic, Mesozoic and Cenozoic) was found from the Precambrian. Among the major tectonic settings in the Southern Korean Peninsula such as the Gyeonggi massif, Okcheon belt, Yeongnam massif, Gyeongsang basin and Pohang basin, the Okcheon belt indicated the greatest resistance. The most and least resistant rocks from the representative nine rocks in the Southern Korean Peninsula were Paleozoic limestone, and Cretaceous sedimentary rock and Cenozoic sedimentary rock, respectively. This study suggests that Paleozoic limestone, Cretaceous volcanic rock, Paleozoic sedimentary rock and Precambrian gneiss can be regarded as hard rocks with high elevation, steep slope and complicated relief, while soft rocks with low elevation, gentle slope and simple relief are Jurassic granite, Cretaceous sedimentary rock and Cenozoic sedimentary rock.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1998년도 가을 학술발표회 논문집
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• pp.313-318
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• 1998

• 한국제4기학회:학술대회논문집
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• 한국제4기학회 2005년도 하계학술대회
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• pp.7-11
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• 2005

The soil erosion processes have estimated using spatial distribution of 137Cs radionuclide in Granite and Sedimentary Hillslopes in South Korea. The local variability of 137Cs inventory indicates that was related positively to organic matter content, clay content and water content and negatively to hydraulic permeability and slope gradient for bulk samples in different landforms within Granite and Sedimentary rock basins. The vertical variability of 137Cs inventory shows that most of 137Cs concentration and organic matter were accumulated between 0 and 2cms and gradually decrease with soil depth in incremental samples in both basins. The vertical variability of 137Cs inventories shows that 137Csinventories increase as we go to toward downslope in both basins. Finally, the soil loss values indicate that hillslope erosion processes are more intensive in Granite rock basin than those in Sedimentary rock basin.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 암반역학위원회 학술세미나 논문집
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• pp.31-50
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• 2002

The sedimentary rocks deposited in Taegu and Kyongbuk region consist of various rocks such as the shale, mudstone, siltstone and sandstone. The characteristics of the sedimentary rocks are distinguished from those of igneous rocks and metamorphy rocks for the stratum caused by deposit environment. This study investigated engineering characteristics of the anisotropy, weathering rock and filled rock joints in the notable features of sedimentary rocks.

• 지질공학
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• 제17권4호
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• pp.535-544
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• 2007

퇴적암에서 발달된 불연속면들은 암반의 공학적 특성들을 결정하는 가장 중요한 인자이다. 이들 불연속면을 기재하는 요소들은 일반적으로 불균질성과 불확실성을 내포하고 있다. 본 연구에서는 이러한 불연속면의 기재요소를 정량적이고 객관적으로 결정하기 위해 확률론적 통계기법을 이용하였다. 울산 일대의 33개의 퇴적암 사면을 선정하여 ISRM(1978)에서 제시한 불연속면의 조사항목을 바탕으로 불연속면의 특성 조사를 수행하였으며, 조사된 항목의 확률분포함수를 분석하여 울산지역 백악기 하양층군 퇴적암류의 지질공학적 특성을 파악하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 춘계 학술발표회
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• pp.999-1008
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• 2009

A series of sedimentary rocks which are formed in the Tertiary are distributed around Samcheok(Samcheok-Pukpyoung basin), Younghae(Younghae basin), Pohang(Pohang basin), Gyeongju(Yangnam basin), Ulsan(Ulsan basin), Jeju(Seogyuipo formation) in the southern region of the Korean Peninsula. This study concerned with geological, geophysical, geotechnical properties of the unconsolidated rocks in the Pohang area. A consolidated rocks are classified as hard rock - soft rock - weathered rock - residual soil follows in degree of weathering. But unconsolidated rocks has soil properties as well as rock's at the same time. The results of field excursion, boring, borehole-logging, rock testing, geophysical survey, laboratory test are soft rock range, but the durability of the rock until the residual soil from the weathered rock. We accomplished the rock mass classification of the unconsolidated rocks.

• 터널과지하공간
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• 제19권5호
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• pp.450-462
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• 2009

본 연구는 국내에서 출토되는 화성암, 변성암, 퇴적암 1,417개 블록의 일축압축강도를 간접방법으로 도출하는 과정에서 각 시험법에 따른 강도발현의 거동 특성을 분석하였다. 퇴적암은 간접시험법에 따라 암석군에 상관없이 동일거동을 보이며, 압열인장강도를 매개로 시행한 과정에서는 암석군끼리 동일 거동 특성을 나타내고 있다. 이는 간접시험법을 적용했을 때에는 지질학적 생성원인에 따라 상관성해석을 시행해야 신뢰성 높은 결과를 도출할 수 있음을 암시한다.

• 농업과학연구
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• 제43권4호
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• pp.634-640
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• 2016

The objective of this study was to evaluate the effectiveness of using HR-GC/MS for the rapid screening of dieldrin residues in soils. Persistent organic pollutants (POPs) of organochlorine pesticides such as dieldrin, were analyzed in sedimentary rock and granite rock collected from greenhouses, Niigata, Japan. Dieldrin remains in Japanese farming soils, more than 40 years after their use as insecticides was prohibited. The averages in soil moisture ranged from 2.79% to 7.20% in soils derived from sedimentary rock and from 25.59% to 31.40% in soils derived from granite rock. Mean concentrations of dieldrin residues in sedimentary rock and granite rock were $39.7ng\;g^{-1}$ and $40.51ng\;g^{-1}$, respectively. Dieldrin residue was detected at a slightly higher concentration in granite rock than sedimentary rock samples. There was no consistency between the two soils or between surface and subsurface soils. The coefficients of variation of the two soils were 10.6% and 8.7%, respectively. These results suggest that our high-resolution mass spectrometry detector (HR-GC/MS) is effective at analyzing residual organochlorine pesticides in soil. In order to increase the precision and sensitivity for chemical analysis of POPs, high-resolution gas chromatography coupled with a HR-GC/MS is highly recommended.