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박종범(Jong-Beom Park),주재우(Jae-Woo Ju),김장흥(Jang-Heung Kim) 한국지반신소재학회 2014 한국지반신소재학회 논문집 Vol.13 No.1
준설매립지반은 준설토에 의해 매립되어 지반이 매우 연약한 상태이며, 설계시 정확한 지지력을 예측하는 것은 더욱 힘들다. 실제 준설매립지를 대상으로 여러 가지 연약지반처리공법을 설계하고 있지만, 특히 준설토지반의 특성에 기인한 장비진입 즉 표층처리공법 또한 문제점을 안고 있다. 이러한 문제점을 개선하고자 연약지반에서 적용 할 수 있는 평판재하시험장치를 개발하게 되었다. 본 연구에서는 준설매립현장을 대상으로 현장에서 개발된 평판재하시험을 이용하여 현장시험을 실시하였으며, 아울러 콘테스트만의 결과를 가지고 준설토지반의 지지력을 구하는 실험식을 제안하고자 하였다. 대부분 준설매립지반은 매립경과시간에 따라 표면건조층의 두께가 달라지게 되므로 본 연구에서 제안한 실험식이 매우 효과적인 방법이라 판단되며, 향후 준설토 매립지반의 공법설계시 기초자료로 활용될 수 있을 것이다. Sea gives us a lot of benefits and one of them is a role of transporting goods easily by ship. Accordingly the industrial area or the container yard is constructed either on the low sea or near the sea. Sea dredging ground is made by pumping them using dredge pump to the inside of embankment after dredging undersea soils. The dredging ground after pumping is in the slurry state but as time goes, consolidation by the own weight happens and evaporation happens at the surface of dredging ground. The evaporation causes the crest layer in the upper side of dredging ground. Under the crest layer there is still a soil of slurry state which has just little bearing resistance. This kind of characteristics makes it difficult to get a exact bearing capacity using the equations proposed until now. In this study we have performed simultaneously both the field loading tests and the cone penetration tests on the sea dredging ground. From the result of field tests, new experimental equation for the ultimate bearing capacity has been proposed. If we use the new equation, it is believed that some design of sea dredging ground could be more accurate.
주재우(Jae-Woo Ju),박종범(Jong-Beom Park),나현호(Hyun-Ho Na),김장흥(Jang-Heung Kim) 한국토목섬유학회 2008 한국토목섬유학회 학술발표회 Vol.2008 No.11
Recently, the reinforced retaining wall is being designed widely by engineers. However, there are a few reinforcement structures that show the horizontal displacement at the front side wall because of the extensible reinforcement. In this case, the structure that wasn't considered about the horizontal displacement could cause the problems. So we should find out the restraint method. In this study for the purpose of obtaining the mechanism of strain control method of reinforced earth structure with the inextensible reinforcement, model tests have been performed using aluminum rod, membrane reinforcement and paper reinforcement. From the test result, we realized that the earth structure that reinforced with the inextensible reinforcement effectively put up with the strain control transformation restraint.
주재우(Jae-Woo Ju),박종범(Jong-Beom Park),나현호(Hyun-Ho Na),김장흥(Jang-Heung Kim) 한국토목섬유학회 2009 한국토목섬유학회 학술발표회 Vol.2009 No.4
Reinforced soil pullout test normally requires over 3 times of tests unlike vertical load test. Existing reinforced soil pullout test device involved some problems that the test takes long time by going through a series of processes such that after 1 time of test ends with pullout box composed of 1 stage, the soil contained in the pullout box is taken out, and after forming model ground by setting soil and reinforcement again, reinforced soil pullout test is performed, and that the reliability of test results is low since the geo-technical properties of model ground differ from those of previous model ground. Therefore, to solve such problems this research intends to propose a reinforced soil pullout tester that can identify the characteristics of behavior between soil and reinforcement through once time of model ground production and test, i.e., reinforcement simultaneous pullout and sequential pullout with capability of multi-stage reinforcement pavement, and can calculate accurate pullout parameter by solving geo-technical properties change of model ground, which is the greatest cause of test results error.