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Piezocone과 Rowe Cell을 利用한 水平壓密係數 推定
권기복,류권일,고영헌,김팔규 忠南大學校 産業技術硏究所 2002 산업기술연구논문집 Vol.17 No.1
Site characterization is one of the most important performances in projects with regard to solving geotechnical problems. Piezocone penetration test is a fast, economic, and accurate method of site characterization. Static cone penetrometer and the piezocone represents the most versatile tools currently available for soil exploration. The cone penetration and piezocone tests provide continuous sounding capability and repeatability. Rare of consolidation parameter may be assessed form the Piezocone test by measuring the dissipation or decay of pore pressure with time after a stop in penetration. And many researches have been developed to determine the horizontal coefficent of consolidation from the Piezocone test. Many of these researches using a theoretical solutions which is determined from either the cavity expantion theory or the stress path method. However, depending on assumptions and analytical techniques, the results can be varied considerably. For that reason, many researchers make their effort to improve and complement the defect of already established methods. In this dissertation, the correlation between the Coefficient of Consolidation from Piezocone dissipation test and the Coefficient of Consolidation Rowe Cell horizontal consolidation test in many cases was studied. The purpose of this study is to know the changing of the Coefficient of Consolidation by loading condition while Rowe Cell horizontal consolidation test is used
윤성중,류권일,고영헌,김팔규 忠南大學校 産業技術硏究所 2003 산업기술연구논문집 Vol.18 No.2
The purpose of this paper is development of the most suitable backfill material which increases thermal stability and decreases thermal resistances for increasing capacity of the transmission of electricity. In order to proceed this study, the sand which recently was used as backfill material and the stone dust as single material for most suitable backfill material was chosen and experiments on thermal character and basic soil properties were proceeded for appreciating stability and economical efficiency. As a result of this study, natural moisture content of stone dust was higher than that of sand and porosity of stone dust and thermal resistance of stone dust was lower than that of sand. Then the stone dust are expected to increase capacity of the transmission of electricity. In point of stability, because total strain of pipe was within allowed strain, two materials are expected to ensure against risks. Stone dust is considered as useful backfill materials by contributing great economical efficiency, because a price of stone dust is half to the sand.
박범준,류권일,고영헌,김팔규 忠南大學校 産業技術硏究所 2003 산업기술연구논문집 Vol.18 No.2
We investigated the stability of rock slope caused by large-scale cutting on construction of rapid-transit railway. Applying anchor method in order to build the up, we analyzed the stability using long-term measurement. Slope stability analysis is established by STABL 5M and DIPS as basic programs. Field measurement is required to prove the stability of rock slope which results from the reinforcement corresponding to slope stability analysis. Thus, we used one ground inclinometer and 8 load-cells for the measurement system.
편심하중 작용시 극한해석 상계법을 이용한 얕은 기초의 지지력 분석
상현규,류권일,고영헌,김팔규 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2
In the study the bearing capacity of the eccentrically loaded shallow footing is estimated by means of the upper bound method of limit analysis. In the case of applying the upper bound, the results depend on the failure mechanism. So the failure surface is correctly studied through the model test using sand. New method is proposed to estimate the bearing capacity of the eccentrically loaded shallow footing by means of the upper bound method to apply the failure mechanism based on the model test. The propriety of new method is verified by the results of various methods. And the influences of the variables eccentricity, embedment depth, variations of contact width factor by model test using sand are also studied in this paper
김지호,류권일,고영헌,김팔규 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2
In general, the term soft ground includes clayey soils, which have large compressibility and small shear resistance due to the external load. All process of consolidation in compressible soils can be explained in terms of transfer of load from an incompressible pore-water to a compressible soil structure. Therefore, one of the most important subjects about the characteristics of the time-dependant consolidation of the clay foundation by the charge of load may be the presumption of the final settlement caused by consolidation and the degree of consolidation according to the time. Pioneering work by Terzaghi imparted scientific and mathematical bases to many aspects of this subject and many people have used this theory to measure the consolidation settlement until now. In the paper, Finite Difference Methods for consolidation are considered. First, it is shown the stability criterion of Explicit scheme and the Crank-Nicolson scheme, although unconditionally stable in the mathematical sense, produces physically unrealistic solutions when the time step is large, it is also shown that The fully Implicit scheme shows more satisfactory behavior, but is less accurate for small time steps. And then we need to decide what scheme is more proper to consolidation. The purpose of this paper is to suggest the pertinent scheme to consolidation.