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전용백,정영갑 대구대학교 산업기술연구소 2004 産業技術硏究 Vol.16 No.1
This study experimented dividing compaction load by dynamic compaction test and an oil pressure hammer compaction test for consolidation strength characteristics experimental feedback about soil change aspect of waste landfill ground and revelation of compaction effect as underground research about consolidation behavior of waste landfill ground by compaction load, foot weight and percussion number of times were adapted differently each other with uniformity drop head when dynamic compaction test, and hammer scale and percussion number of times were adapted differently also when oil pressure hammer compaction test.
전용백 대구대학교 산업기술연구소 1987 産業技術硏究 Vol.6 No.-
Although retaining walls are commonly designed according to classical theories, for large projects it is important to consider the effects of surcharge and cyclic loading on earth pressure acting ona retaining wall. This paper intends to investigate such effects through experiments. The contents of the investigation are effects of position of repeated loading, loading and unloading, passing frequency, and overconsolidation ratio. For the purpose of the investigation an experimental load-deflection system is developed and the system is possible to measure deflection of the wall and earth pressure due to different size of strip loading and cyclic loading. The findings from the experiments are as follows: 1. As repeated loading approaches to the wall, the measured horizontal residual earth pressure agrees well with Rowe's empirical formula, while as the loading is far from the wall the earth pressure consists with Boussinesq's and Spangler's formulas. Also it is found that below 0.6m depth from ground surface the effects of repeated loading can be nearly neglected. 2. From comparison analyses of earth pressure theories and experimental results, a regression equation is suggested herein, and earth pressure at any depth and maximum earth pressure due to cyclic loading can be estimated from the equation.
荷重量에 依한 軟弱地盤의 沈下 및 强度增加에 關한 實驗的 硏究
전용백 대구대학교 산업기술연구소 1985 産業技術硏究 Vol.4 No.-
In this paper, when the flexible load is applied on the soft ground, it's settlement is classified in four items, initial settlement, primary consolidation, secondary consolidation, settlement by prastic flow. It is studied the initial settlement, primary consolidation, bearing capacity factor and the increase of strength of the ground, from Triaxial Compression Tests. The initial settlement can be calculated as an elastic deformation under the effective stress. The primary consolidation can be calculated as a consolidation settlement under the pore pressure. Increase of strength can be calculated from Triaxial Compression Test.
전용백,신기혁 대구대학교 과학기술연구소 1995 科學技術硏究 Vol.2 No.1
This study looked into change in earth pressure applied when surcharge load was applied to backfill in rigid walls and movement of earth pressure and backfill when rotation about bottom was applied to walls and these survey results were compared with value calculated by theoretical firmula for analysis. 1. Earth pressure due to surcharge load showed great increase up to 34cm depth of walls, but the effect of surcharge load was minimal at the locations lower than 34cm depth. In addition, earth pressure was greatly increased as distance between back of walls and loading plate becomes closer. 2. When earth pressure by surcharge load and the result calculated by existing theoretical formula were compared, it was closer to Rowe's theory up to 34cm depth from backfill surface, and it was closer to Spangler's theory at locations lower than above depth. 3. As a result of comparison of earth pressure measured when rotation about bottom was applied to walls with earth pressure calculated by theory, the value measured by experiment was about 0.9 to 1.5 times Coulomb's value, and Debrova's value was greater by about 2.6 to 4.6 times earth pressure measured.
롤-러 다짐하중에 의해 옹벽에 작용하는 토압의 실헙적 연구
전용백 대구대학교 산업기술연구소 1993 産業技術硏究 Vol.12 No.-
As the scale of the public works get recently larger and diversified, the construction of the retaining wall is essential for the effective use of the land. In the design of the retaining wall, the reliability and the fitness of the retaining wall itself are regarded prudently although there is a tendency to ignore the importance of the backfill. In this work, the experiments under various condition such as roller-press-load, and working space of backfill are carried out using the retaining wall similar to the real system. The experimental results are interpreted theoretically. Using a computer program, the experimental results are analyzed and compared with other theoretical formulas.