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인현식 ( In Hyun Sik ),송창섭 ( Song Chang Seob ),임성윤 ( Lim Sung Yoon ) 한국농공학회 2002 한국농공학회 학술대회초록집 Vol.2002 No.-
The purpose of this study is to evaluate the loss volume of base soil materials with the grain size range of filter materials for agricultural reservoir. The test results show that the loss volume is increased with the hydraulic pressure, and the amount of loss volume for same sample is different with the filter range.
필터재의 입도범위와 작용수압에 따른 성토재의 유실 특성
송창섭 ( In Hyun Sik ),인현식 ( Song Chang Seob ) 한국농공학회 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.3
The objective of this study is to evaluate the stability of the design criteria recommended by Betram and Terzaghi as compared with the experimental result. A series of NEF tests was conducted to determine the loss of volume in base soils. The three kinds of base soils classified as CL, SC and SM are used for the NEF tests with various hydraulic pressures and filters following upper and lower bond of the criteria. Volume loss characteristics of the base soils was examined closely by the results of the test successfully. Firstly, it was found that the loss of base soils was mostly eroded at the first stage of seepage. Secondly, the amount of loss volume was ranked CL > SM > SC in order of their amounts for upper criteria, and SM > CL > SC orderly for lower criteria. Thirdly, the volume loss of all soils was increased with increasing the hydraulic pressures. And lastly, the needs of the new design criteria was proved for the control of seepage and piping.
송창섭 ( Song Chang Seob ),이신호 ( Rhee Shin Ho ),반창현 ( Ban Chang Hyun ),인현식 ( In Hyun Sik ) 한국농공학회 1998 한국농공학회 학술대회초록집 Vol.1998 No.-
This study was performed to ascertain the three-dimensional effect of the crack reduction and the restrained effect of crack growth, and to yield a suitable mixing ratio of the synthetic fiber reinforced soil. The results of the study are as follows ; 1) The synthetic fiber has the resisting force for crack because of the adhesion due to the attraction of soil particles. 2) As the synthetic fiber length and the mixing ratio are increased, mono filament synthetic fiber reinforced soil is increased the effects of crack reduction and the restraint of crack growth. 3) The fibrillated synthetic fiber is more effective than mono filament synthetic fiber for crack. 4) A suitable mixing ratio of synthetic fiber reinforced soil is 0.5% of the fibrillated synthetic fiber.