폐기물매립지 선별토사의 재활용을 위한 흙 시멘트 효과에 대한 역학적 특성

김영묵,김원주 한밭대학교 건설안전기술연구소 2004 건설안전기술논문집 Vol.4 No.-

To recycle used wasted disposal fill, it is most important that selected waste soil effectively be used. In the many case of used wasted disposal fill, ordinary soil is occupying more than 50% of wasted disposal fill usually, and that selected waste soil utilizes by cover materials is applied actually. It is essential for use as construction material to recycle selected waste soil. This study performed characteristics of geotechnical engineering characteristics in considering soil-cement effect to utilize fill materials in selected waste soil. Wished to get basis data to use to fill materials on the basis of analysis result executing a basis physical experiment and unconfined compressive test of soil cement, direct shear test etc., and the results of this summary as follow. The results of unconfined compressive strength, was increased until 7 days after curing rapidly. In the case of 7 days curing, the unconfined strength was appeared averagely 90% of 28 day curing. When direct shear test, the cohesion was increased rapidly at curing early but after small increased. In the case of 3 day cohesion, about 70% appear of 28 day cohesion. For shear strength of selected waste soil, soil-cement effect was appeared to cohesion enlargement mainly, but there was small change of angle of internal friction. When increasing of cement content was induced to do large cohesion of soil, but angle of internal friction was showed small increasing rate relatively. 우리나라의 과거 폐기물 최종 처분방식은 도심지 주변지역에 단순투기방식을 통한 매립에 의존하여 왔다. 1999년을 기준으로 하여 우리나라에서는 전체 폐기물의 25%, 생활폐기물의 52%를 매립에 의존하고 있는데 이러한 매립비율은 1996년의 전체 폐기물의 40%, 생활폐기물의 68% 와 비교해 볼 때 매립 율이 다소 감소하였으나, 과거의 폐기물처분방식은 단순매립에 높은 비중을 차지하고 있음을 알 수 있다. 최근 급격한 도시화와 인구증가에 따른 도시의 확장으로 인하여 활용 용지의 필요성이 더욱 대두됨에 따라 도시 주변에 대한 개발과 더불어 기존의 사용 종료된 매립지를 재이용하려는 방안이 검토되고 있다. 이에 대한 대책으로 매립지 부지를 굴착하여 재이용하려는 매립지의 굴착 자원화 기술, 즉 landfill mining 이 관심의 대상이 되고 있으며 관련 연구가 발표되고 있다. 본 연구는 폐기물 선별토사를 성토재로 활용하는 방안이 중요한 선별토사의 재활용에 중요한 방안이 될 수 있으므로 이에 관련하여 선별토사의 흙 시멘트 효과에 대한 토질공학적 특성을 파악하고자 하였다. 폐기물 매립장의 물리적 조성을 알기 위하여 채취한 선별전 시료로부터 11 가지의 종류별로 분류하여 물리적 조성 및 삼성분을 조사하였으며, 폐기물 매립장의 토양조사를 실시하여 토양 오염도를 분석하였다. 또한 폐기물 채취시료를 선별한 후 선별토사의 물성시험은 한국산업규격을 기준으로 하여 비중시험, 함수비시험 및 입도분석시험 등을 실시하였다. 또한, 선별토사의 다짐시험은 일반 성토부의 다짐기준인 A다짐시험 (KS F 2312)을 실시하여 최적함수비 및 최대건조단위중량을 구하였다. 선별토사를 시벤트와 혼합하여 최적함수비 조건에서 공시체를 제조한 후 일축압축강도 시험을 실시 하였으며, 이때 선별토사에 대한 시벤트의 혼합비율이 0, 3, 6, 9, 12%가 되도록 시료를 조성하였다. 성토 후 전단강도 정수를 구하기 위한 흙 시멘트 의 직접전단시험은 선별토사에 대한 시멘트의 혼합비율이 0, 1.5, 3.0, 4.5, 6.0% 가 되도록 시료를 조성하여 시험을 실시하여 그 결과를 분석하였다.

강우시 도로포장이 도로성토사면의 안정에 미치는 영향

김영묵,어경제 한밭대학교 건설안전기술연구소 2004 건설안전기술논문집 Vol.4 No.-

The effects of road pavement influence on stability of road landfill by rainfall infiltration were analyzed in this study. A typical landfill model were selected and seepage behaviour was analyzed by finite element method. According to application availability of road pavement, the model were divided by nothing pavement, whole pavement, and portion pavement. And landfill height, rainfall condition, slip surface depth, and change of pore water pressure were analyzed. The research result was as followed. When landfill height was 5m and nothing pavement, increase of pore water pressure was showed remarkedly after rainfall end, but in case of the whole pavement and portion pavement was decreased. In case of the landfill height was 10m, 15m, the pore water pressure change by pavement availability was displayed resemblant change nearly. During rainy season, the stability of landfill was received an influence that landfill height 5m was below according to pavement condition, but in the case was more than 10m, the efect was slight. The depth of sliding from slope surface was showed form that increase according to landfillb height, but the relation of pavement condition about sliding depth could not be divided hardly.

폐기물 매립지반에 대한 동다짐공법 적용평가

김영묵,이상용,김만구,신승철,Kim, Young Muk,Lee, Sang Yong,Kim, Man Goo,Shin, Seung Cheol 대한토목학회 1993 대한토목학회논문집 Vol.13 No.5

본 고는 폐기물 매립지반의 지반개량을 위하여 1992년 3월 16일부터 1992년 10월 25일까지 수행된 동다짐공사 결과에 대한 연구사례이며, 개량대상지역은 대전시 갑천변에 위치하는 폐기물 매립부지로 1983년부터 1989년까지 주로 도시생활 쓰레기, 연탄재, 구조물 해체 잔해물 및 일부 산업폐기물로 매립되어 형성된 지역이다. 동다짐 공사는 2개 지점에서 시험동다짐을 시행하여 그 결과를 기준으로 수행되었으며, 개량효과 분석 및 품질관리를 위하여 각종 현장확인 시험 및 지반거동 계측을 수행하였다. 또한 동다짐시 인접된 구조물에 미치는 영향을 분석하기 위하여 진동측정을 시행하였다. 제반 현장시험 및 계측자료 분석결과 전체적으로 지반의 강도증가 및 압축효과가 양호한 것으로 확인되어 본 지역의 폐기물 매립지반에 대한 동다짐공법 적용은 효과적인 것으로 나타났으며, 향후 본 지역과 유사한 폐기물 매립지반에 대한 동다짐공법 적용시 참고가 될 수 있을 것으로 기대된다. This article is a case study of the ground improvement project which was carried out for manmade landfill. The project area is located near to Kapchun, Teajon and composed of the municipal wastes dumped, demolished building debris, coal ash and industrial waste made between 1983 and 1989. The DDC(dynamic deep compaction) based on the results of the test compaction at two representative locations was carried out from March 16, 1992 to Oct. 25, 1992. Field measurements and laboratory tests were carried out for ground improvement assessment and quality control for the DDC(dynamic deep compaction) work. From the results of field measurements and laboratory tests, it was found that the DDC work was successful: waste landfill was compressed considerably (${\fallingdotseq}$ 15% of full depth); and the strength was increased satisfactorily (${\fallingdotseq}$ 100% of original penetration resistance), Also, it is expected that the results of this work could be a guide to the future DDC work with the similar ground conditions, i.e. man-made landfills.

日帝下의 産米增殖 計劃

金泳默 청주대학교 경제학회 1991 經濟學論究 Vol.14 No.-

어머니

김영묵 새가정사 1965 새가정 Vol.- No.-

數値解析에 의한 降雨時의 浸透 特性

金英默 동국대학교 대학원 1988 大學院硏究論集-東國大學校 大學院 Vol.18 No.-

The annual rainfall in Korea is about l,153mm and more than 2/3 of the annual rainfall occurrs during summer season. During rainfall, extensive landsliding is followed over the sloping areas. The occurrence of landsliding in the sloping areas is due to increment of saturation of the soil by surface infiltration and ground water during rainfall. If the rainfall intensity is greater than the saturated hydraulic conductivity of the soil, a pond of water or surface runoff on the soil can be resulted. The static water pressure of surface runoff or ponding water influences infiltration characteristics. The aim of this study is to understand the infiltration characteristics of unsaturated soil during rainfall. In order to investigate the effects of rainfall on the infiltration characteristics, it is assumed that the soil consist of Del Monte fine sand. Some interesting problems involving unsaturated flow are analyzed numerically by UNSAT2 program based on Galerkin's weighted residual method.

有限要素解析에 의한 無限斜面의 限界降雨量 決定

金英默 동국대학교 대학원 1989 大學院硏究論集-東國大學校 大學院 Vol.19 No.-

A good many natural slope failures in korea occur during rainfall. The natural slopes are infinite slopes that contain some finite soil depth. Modeling the infiltration of infinite slope requires that saturated and unsaturated hydraulic properties of slopes be establish. The aim of this study is to analyze some quantative relationship between rainfall intensity and soil engineering properties and to determine a critical rainfall intensity influenced seepage behavior. It is analyzed numerically by TRASEE program based on Galerkins's method by the residual method. The example of this study is natural slope failure due to rainfall at Munhyundong in Busan for 1985.7.5. The result of this study, the failure is due to not comulative precipitation amount prior to failure but continuous rainfall during 14 hours over critical rainfall intensity 5ks obtained this study.

매립지의 물리화학적 특성에 관한 연구

김영묵,김인규,윤오섭 한국폐기물자원순환학회 1995 한국폐기물자원순환학회지 Vol.12 No.2

진성다혈구증과 병발된 IgA신증 1예

김영묵,이충원,오정열,최정숙,류수현,임종섭,유대성,제영성,주종은 침례병원 1994 浸禮病院學術誌 Vol.11 No.

무선인지기능 무전기의 적정 재고수준 산정 모형에 관한 연구

김영묵,최경환,윤봉규,Kim, Young-Mook,Choi, Kyung-Hwan,Yoon, Bong-Kyoo 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.4

Cognitive Radio(CR) is the technology that allocates the frequency by using dynamic spectrum access. We proposed a model to calculate the optimal level of the cognitive radiotelegraph, where secondary users opportunistically share the spectrum with primary users through the spectrum sensing. When secondary user with cognitive radio detects the arrival of a primary user in its current channel, the secondary user moves to the idle channel or be placed in the virtual queue. We assume that the primary users have finite buffers and the population of secondary users is finite. Using a two-dimensional Makov model with preemptive priority queueing, we could derive the blocking and waiting probability as well as the optimal level of cognitive radiotelegraph under a various range of parameter circumstances.