새만금지역 준설매립지반의 압밀특성분석

허준 ( Joon Heo ),정민철 ( Min-chul Jung ),김성필 ( Seong-pil Kim ) 한국농공학회 2013 한국농공학회 학술대회초록집 Vol.2013 No.-

우리나라의 협소한 국토사정에 의한 간척 및 항만 물류 기반시설의 확충에 따라 연안지역에 대한 개발이 활발히 이루어지고 있다. 특히 이들 개발에 있어 준설토 매립 등으로 인위적으로 조성한 부지가 여러 용도로 활발하게 활용되고 있다. 연안지역을 성토, 매립하는 경우에, 개발된 지역은 포화되어 있는 상태이기 때문에 안정성의 문제가 발생할 수 있으며 특히 지반의 압밀 침하가 완료되지 않는다면 준설매립 지반 조성 후 피해가 우려된다. 본 연구에서는 새만금 지역 준설매립지반에 대하여 압밀침하 분석에 사용되는 지반 자료의 변동특성을 파악하고, 이에 따른 준설매립토 지반의 압밀특성을 분석하였다.

점토성 준설매립토의 유보율 산정을 위한 퇴적물 이송 실험

양수현(Yang, Su-Hyun),박영재(Park, Young-Jae),류홍렬(Ryu, Hong-Ryul),황규남(Hwang, Kyu-Nam) 한국연안방재학회 2014 한국연안방재학회 학술발표대회 논문집 Vol.2014 No.-

본 연구에 서는 점토성 준설매립토의 유보율을 정량적으로 산정하기 위하여, 매립용 준설토의 퇴적 및 침강특성에 대한 실험적 연구가 수행 되었다. 이들 실험을 통하여 매립지 내에 퇴사되는 퇴사량 및 유출 토사량이 정량적으로 산정될 수 있음이 확인되었으며, 실험을 통해 산정된 유보율 결과는 현장에서 직접 측정된 부유농도로부터 도출된 유보율 산정결과와 비교․ ·분석되어 타당성이 검증되었다.

건조효과를 고려한 준설매립토의 압밀거동

유남재,박병수,이명욱,이주원 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A

This research is to investigate the self-weight consolidation settlement and desiccation shrinkage settlement of soft marine dredging clay by performing numerical and experimental works. Large column test were carried out investigate the consolidation settlement considering effect of the self-weight and desiccation shrinkage, and centrifuge model test was also carried out investigate self-weight consolidation settlement. Results of centrifuge model and large column experiments about changes of settlement with time were analyzed by using the numerical technique of explicit finite difference method considering effect of the self-weight and desiccation based on the finite strain consolidation theory. Centrifuge model test results were in relatively good agreements with analyzed results in terms of self-weight consolidation settlement with time. Large column test results showed quite different values from the numerically estimated one, carried by experimental conditions.

준설매립투기장에서 응력증가가 구조물 기초에 미치는 영향 연구

양태선,김준석 청운대학교 건설환경연구소 2011 청운대학교 건설환경연구소 논문집 Vol.6 No.2

In the embankment along the harbor, changes of geotechnical properties in a dredged and reclaimed soil, and effects of pier foundations by increasing the stress of the reclaimed landfills are studied for stability before and after increasing height of embankment section. Embankment section to confirm stability is examined during dredging. As the stability is needed in the embankment which is located near bridges, one of existing embankment after increasing the height of landfills is indispensable. The methods, such as the limit equilibrium method for short-term analysis, finite element method for long-term analysis are applied. The results of analyses are satisfied with confirming stability(displacement, stress) during dredging, as in the purpose of this paper. 준설토 투기장 증고로 인한 인접구조물의 안정성을 검토하기 위한 연구로서 기존 호안단면의 안정성 검토와 증고시 안정성을 검토하였고 준설투기 시 안정성이 확보되는 단면을 검토하였다. 본 호안은 교량 인접 호안으로 안정성이 요구되며 호안 증고 및 준설토 투기로 인한 호안과 교량 교각의 안정성을 검토하였다. 단기 안정성 검토는 한계 평형해석을 수행하였고 장기 안정성 검토는 유한요소해석을 수행하였다. 본 논문의 목적에 만족하게 해석결과는 증고 단면이 준설토 투기시 안정성(응력, 변위)을확보 하는 것으로 판단된다.

건조효과를 고려한 준설매립토의 압밀거동

유남재(Yoo Nam Jae),박병수(Park Byung Soo),이명욱(Lee Myung woog),이주원(Lee Joo Won) 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.1

This research is to investigate the self-weight consolidation settlement and desiccation shrinkage settlement of soft marine dredging clay by performing numerical and experimental works. Large column test were carried out investigate the consolidation settlement considering effect of the self-weight and desiccation shrinkage, and centrifuge model test was also carried out investigate self-weight consolidation settlement. Results of centrifuge model and large column experiments about changes of settlement with time were analyzed by using the numerical technique of explicit finite difference method considering effect of the self-weight and desiccation based on the finite strain consolidation theory. Centrifuge model test results were in relatively good agreements with analyzed results in terms of self-weight consolidation settlement with time. Large column test results showed quite different values from the numerically estimated one, carried by experimental conditions.

부산지역 준설매립지반의 압밀거동 특성 분석

유남재(Yoo, Nam-Jae),김동건(Kim, Dong-Gun)황희석(Hwang, Hee-Seok) 강원대학교 산업기술연구소 2012 産業技術硏究 Vol.32 No.1

For soils with high void ratios, the inverse method of utilizing results obtained from centrifuge model test was used to find the constitutive relation of effective stress - void ratio - permeability whereas conventional oedometer test and constant rate of strain consolidation(CRS) test about settlement of interface and pore pressure and distribution with time were compared with numerically estimated values to confirm such a constitutive relation as obtained from the inverse method. As results of numerical method, the volumetric ratio and reclamation velocity were obtained for the reclamation condition.

준설토의 건조수축에 의한 강도증가 특성과 지지력에 관한 연구

유남재(Yoo Nam Jae),이종호(Lee Jong Ho),이명욱(Lee Myung Woog),김현주(Kim Hyun Joo) 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.1

This research is results of experimental and numerical works on characteristic of strength increase and bearing capacity in dredged and reclaimed soil due to desiccation shrinkage. For a soil sampled from southern coastal area in Korea, basic soil property tests and standard consolidation test with falling head permeability tests were carried out to obtain consolidational characteristics of soil. Double cone penetration test. laboratory vane test and unconfined compression test were also performed to investigate the change of shear strength with degree of desiccation. Model tests were performed in 1G environment and 30G level artificially accelerated condition by using the centrifuge model test facilities to investigate the bearing capacity of desiccated ground. Test results were analyzed by using the bearing capacity of desiccated ground. Test results were analyzed by using the theoretical and load-settlement characteristics method proposed by Meyehof & Hanna(1978). On the other hands, the numerical technique, using the finite strain consolidation theory considering the effect of desiccation was used to estimate the appropriate time of using heavy construction equipments in field with respect to strength increase due to desiccation.

배수재의 직경과 형상변화가 수평진공배수에 미치는 영향

유남재(Yoo Nam Jae),박병수(Park Byung Soo),정길수(Jeong Gil Soo),이병곤(Lee Byung Kon) 강원대학교 산업기술연구소 2001 産業技術硏究 Vol.21 No.1

This paper is experimental results of investigating the efficiency of horizontal vacuum drainage system. Effects of size and shape of drain on horizontal vacuum drainage were studied. Model tests in the laboratory with soft marine clay were carried out with drain pipe of having three different diameters and PBD (Plastic Board Drain) of strip shape so that consolidation settlement of soft clay due to applied vacuum pressure, amount of discharge, ground settlement and distributions of pore pressure and undrained shear strength were measured during testing. From results of model test, amount of discharge due to vacuum pressure was increased with the diameter of pipe drain whereas the drain efficiency of pipe in per unit area of drain surface was decreased with diameter of pipe. The rate of discharge per unit time was reduced very fast with diameter of pipe. Settlement of ground surface with time was increased with diameter of pipe as a result of increase of discharge to drain pipe.

준설토의 건조수축에 의한 강도증가 특성과 지지력에 관한 연구

유남재,이종호,이명욱,김현주 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A

This research is results of experimental and numerical works on characteristic of strength increase and bearing capacity in dredged and reclaimed soil due to desiccation shrinkage. For a soil sampled from southern coastal area in Korea, basic soil property tests and standard consolidation test with falling head permeability tests were carried out to obtain consolidational characteristics of soil. Double cone penetration test. laboratory vane test and unconfined compression test were also performed to investigate the change of shear strength with degree of desiccation. Model tests were performed in 1G environment and 30G level artificially accelerated condition by using the centrifuge model test facilities to investigate the bearing capacity of desiccated ground. Test results were analyzed by using the bearing capacity of desiccated ground. Test results were analyzed by using the theoretical and load-settlement characteristics method proposed by Meyehof & Hanna(1978). On the other hands, the numerical technique, using the finite strain consolidation theory considering the effect of desiccation was used to estimate the appropriate time of using heavy construction equipments in field with respect to strength increase due to desiccation.

배수재의 직경과 형상변화가 수평진공배수에 미치는 영향

유남재,박병수,정길수,이병곤 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.A

This paper is experimental results of investigating the efficiency of horizontal vacuum drainage system. Effects of size and shape of drain on horizontal vacuum drainage were studied. Model tests in the laboratory with soft marine clay were carried out with drain pipe of having three different diameters and PBD (Plastic Board Drain) of strip shape so that consolidation settlement of soft clay due to applied vacuum pressure, amount of discharge, around settlement and distributions of pore pressure and undrained shear strength were measured during testing. From results of model test, amount of discharge due to vacuum pressure was increased with the diameter of pipe drain whereas the drain efficiency of pipe in per unit area of drain surface was decreased with diameter of pipe. The rate of discharge per unit time was reduced verb fast with diameter of pipe. Settlement of ground surface with time was increased with diameter of pipe as a result of increase of discharge to drain pipe.