http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
동결(凍結)-융해작용(融解作用)이 흙의 강도특성(强度特性)에 미치는 영향(影響) (IV) - 단열재(斷熱材)를 삽입(揷入)한 동결성토(凍結盛土)의 단열거동(斷熱擧動) -
유능환 ( Ryu Neung Hwan ),박승범 ( Park Seung Bum ),유영선 ( Ryu Young Sun ) 한국농공학회 1990 韓國農工學會誌 : 전원과 자원 Vol.32 No.3
This paper was analized the thermal conductivity of polystylene (TENSAR- GEOGRID) embeding into the subbase through frost penetration depth, frost heave, change of bearing capacity, and soil moisture movement due to freezing, thawing and icing actions, and their results were as follows : 1. The change of temperature into the sub-base was much increased by the Tensar-Geogrid insertion, and the frost penetration and frost heave were decreased as the thinner of the insulation thickness but the thawing velocity of melting period was appeared to be faster in case of non-insulated. 2. The frost heave had a close relationship with the thickness of insulations which was reasonably included anti-frost effects. 3. The moisture content during the freezing period of upper layer of the insulation insertion was increased by 15 per cent but it was returned to initial state of the thawing period, and at the down layer temporarily increased by 10 per cent and returned to the original state at once. 4. The insulation was acted as a function of distribution of surcharge, and the settlement of the sub-base was about 1.5 mm under 15 tonnage of load and which was included within the allowable limits. 5. The sliding resistance due to the icing which was induced by the insulation insertion into the sub-base was appeared as more 40 per cent than noninsulation area, so that the insulations should be restricted on the place such as mountains, curved and cross area which were required the braking power under the traffics.
유능환 ( Ryu Neung Hwan ),연규석 ( Yeon Kyu Seok ),김기성 ( Kim Ki Sung ),이윤수 ( Lee Youn Soo ),최동순 ( Choi Dong Soon ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-
This study was initiated to develop a precast polymer concrete panel production method and to describe some engineering properties of FRP(Fiberglass Reinforced Plastics) reinforced polymer mortar. Specimens with different panel thickness and FRP reinforcement were prepared and tested and analyzed with respect to structural behaviors. Cracking moment was mostly affected by the thickness and reinforced FRP. Data of the study could be widely applied to the designing and planning of production processes of many polymer concrete products of which all or some of the components are composed with thin panels.
유능환 ( Ryu Neung Hwan ),( Alan Mcgown ),유영선 ( Ryu Young Sun ) 한국농공학회 1990 韓國農工學會誌 : 전원과 자원 Vol.32 No.2
This study was carried out to find the effects of freeze thaw behaviour on the thermal characteristics of soil layer, for the measurement of thermal conductivity, the styrofoam base and the base replased with gravely sand were constructed and their results were as follows ; 1. The frost heave was appeared to be top around the end of January, and the value in the case of base insulated with styrofoam was shown to be eight times larger than that of the base replased with gravely sand. 2. The frost penetration depth was peaked between the 20th and 30th of January, the depth in case of styrofoam base was about 80 cm and the gravely sand base, 140 cm, and the former was seemed to be more effective on the thermal conductivity than the latter. 3. The relationship between frost heave and frost penetration depth was expressed as y=e 0.571x-4.087, and that we can easily estimate the frost penetration depth on the ground of the equation through the simple measurement of the frost heave. 4. It was appeared that construction cost was decreased by 40% in the case of base insulated with styrofoam compared to the base replased with gravely sand on the same frost resistance capacity. The economic construction range was seemed to be more than 100 meters.
기초지반(基礎地盤)의 지지력보강공법(支持力補强工法)에 관한 연구(硏究)
유능환 ( Ryu Neung Hwan ),최예환 ( Choi Ye Hwan ),유연택 ( Ryu Yean Taek ) 한국농공학회 1988 韓國農工學會誌 : 전원과 자원 Vol.30 No.1
This paper presented as follows results of laboratory model tests with various shaped footings on soil bed reinforced with the strips on the base of behaviour of soil structure according to the loads and triaxial test results reinforced with geotextiles. Their parameters studied were the effects on the bearing capacity of a footing of the first layer of reinforcement, horizontal and vertical spacing of layers, number of layers, tensile strength of reinforcement and iclination load to the vertical. 1. Depending on the strip arrangement, ultimate bearing capacity values could be more improved than unreinforced soil and the failure of soil was that the soil structure was transfered from the macrospace to microspase and its arrangement, from edge to edge to face to face. 2. The reinforcement was produced the reinforcing effects due to controlling the value of factor of one and permeable reinforcement was never a barrier of drainage condition. 3. Strength ratio was decreased as a linear shape according to increment of saturation degree of soil used even though at the lower strength ratio, the value of M-factor was rot influenced on the strength ratio but impermeable reinforcement decreased the strength of bearing capacity. 4. Ultimate bearing capacity under the plane-strain condition was appeared a little larger than triaxial or the other theoretical formulars and the circular footing more effective. 5. The maximum reinforcing effects were obtained at U / B=0.5, B / B=3 and N=3, when over that limit only acting as a anchor, and same strength of fabric appeared larger reinforcing effects compared to the thinner one. 6. As the LDR increased, more and more BCR occurred and there was appeared a block action below Z / B=0.5, but over the value, decrement of BCR was shown linear relation, and no effects above one. 7. The coefficient of the inclination was shown of minimum at the three layers of fabrics, but the value of H / B related to the ultimate load was decreased as increment of inclination degree, even though over the value of 4.5 there wasn't expected to the reinforcing effects As a consequence of the effects on load inclination, the degree of inclination of 15 per cent was decreased the bearing capacity of 70 per cent but improved the effects of 45 per cent through the insertion of geotextile.
사면보호용(斜面保護用) 범용보강(凡用補强)콘크리트블록의 개발(開發)
유능환 ( Ryu Neung-hwan ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-
The reinforced concrete blocks for reinforced earth layer are combined with soil structures consisted of facing unit, reinforcing materials and soil. Those environmentally friendly facing units of reinforced concrete blocks are made of mine waste and tailing and that will be played a role of the effects of recycling use of wasted resources. The block are consisted of three types as curved or straight in order to control topography. The systems are also not limited to wall hight so that they are effectively used for protecting the slope of banking and cutting of earth works. The reinforced concrete blocks developed this time will be effectively applied for not only retaining wall, road, park, golf course, public office building constructions but also protecting of slope stabilization projects.
유능환 ( Ryu Neung Hwan ),연규석 ( Yeon Kyu Seok ),김기성 ( Kim Ki Sung ),지경용 ( Ji Kyung Yong ) 한국농공학회 1998 한국농공학회 학술대회초록집 Vol.1998 No.-
The objective of this study was to develop a polymer mortar defensive block with high strength and durability using unsaturated polyester resin to complement defects of conventional cement mortar defensive block. Physical and mechanical properties of the polymer mortar defensive block were also investigated. Low absorptivity, high impact strength, and great bending strength of the polymer mortar defensive block was compared with those of the conventional cement defensive block. In conclusion, the polymer mortar defensive block is excellent and useful as industrial products for erosion control works.