http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
류제천,박춘수,정석영 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2
In domestic research, standard penetration test and cone test have been used largely for the investigation of soft ground. But standard penetration test has been developed to apply to sand and its result is under the influence of experimenter's skill. The cone used so far has also experimental limitation in the point that penetration into stiff ground is difficult. Recently Piezocone is used world-wide for the investigation of soft ground. Piezocone makes it possible to get more acculate information upon ground because to add to the function of existing cone, it has that of measuring pore water pressure. In this thesis the result of this research is compared with that of laboratory test in the same area. In the result of study the coefficient of consolidation in the horizontal direction of investigation area is ?? and the mean of the cone factor is 15. There is little difference in the soil classification between by Piezocone test and by existing tests. If Piezocone is continuously studied, revised and amended to be suitable for domestic condition, more correct and pre cise research on soft ground will be possible.
정석영,박춘수,류제천 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.2
Recently, many deep excavation have been practiced in constructing building or subways in urban areas to utilize more effectively underground space. In doing such underground excavations, information-oriented construction through the field measuring is getting more important not to give damages the next buildings and to practice in safety. The earth pressure, horizontal displacement, underground water table and so on are included in the item to make sure of safety through the field measuring. The empirical earth pressure come from the strut retention. But in recent days the two reasons have made the construction having been used through anchored retention why the width of earth retaining is so wide and here is a purpose to make use wider and wider the space of work. I come to make conclusions as follow to observe the safety of earth retaining structures with horizontal displacement and underground water table and to study lateral earth pressure of anchored retention earth retaining walls with load cells on the anchored retention sites.
鋼管多段 Grouting 工法의 Tunnel 補强效果에 關한 硏究
박진원,류체천,김송만,박춘수 충남대학교 산업기술연구소 2001 산업기술연구논문집 Vol.16 No.1
When Umbrella Arch Method is applied in construction of the first Ok-chon tunnel which have soft ground zone or fractured zone, the result as finite element analysis method, the PENTAGON-2D, is following. 1)There is little effect in bottom displacement due to side wall reinforcement, but side wall displacement decrease 50%. 2)Before reinforced by Umbrella Arch Method, rockbolt axial stress is 16 ton which exceed allowed axial stress, however after reinforced, that is about 5.5ton in up and down path, therefore rockbolt axial stress after reinforced is safe. 3)In shotcrete, compression stress decrease average 65% and shearing force and bending moment is decrease more than average 65%. hence shotcrete has great effect on ground reinforcement in side wall. 4)Umbrella Arch Method was proven as assistant method in fractured zone, but in long term stability, judging the fact that bottom displacement is slightly great, the tunnel invert is continued. Or bottom must be reinforced with reinforced with reference to field measurement data in excavation.
민홍기,류제천,김송만,박춘수 忠南大學校 産業技術硏究所 1997 산업기술연구논문집 Vol.12 No.2
Korea has the ground which freezes in winter and melts in warmer seasons by turns. Therefore, in designing civil-structures or buildings on such ground, the depth of seasonal frost penetration must be considered. In this paper, approximate contours of the maximum depth of frost penetration in Korea is presented. The National Construction Research Institute of Korea has measured the depth of the frozen ground covering all the area of South Korea during the ten years ranging through 1980. The measurement were made for the frozen ground at random but intended for the most frost-susceptible soils. The contour of the maximum depth of the frost penetration is drawn on a map with data collected during the ten years. It is known that the maximum depth of the frost penetration is related to freeze index values. An empirical formula expressing the relation is suggested, in which the depth is proportional to the one-fifth power of the air freezing index values.
김송만,류제천,박춘수 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1
As basements are built to greater depths and building developments occupy greater plan areas, the problems of settlement and horizontal displacement occur. To ensure minimum soil movement horizontally and vertically, around and below a deep excavation of given soil conditions, several measured are meccessary. Sometimes adjacent structures is damaged horizontal displacement and vertical settlement around and below of site. Recently, the intrumentation has many important roles in estimating and keeping stability of underground structures. Therefore, I present the characteristic of horizontal displacement through comparing instrumentation data with sunex program results for retention walls in a TaeJon site. As I think collectively many instrumentation data adn each field conditions, I point main factors causing horizontal displacement. Using instrumentation data, I propose a relationship representing a depth and magnitude with maximum horizontal displacement happens
유윤종,류제천,임희대 忠南大學校 産業技術硏究所 2003 산업기술연구논문집 Vol.18 No.2
In this study, 1/8 model tests were carried out to understand the properties of the deep foundation and reinforced deep foundation. Also, carried out tests, divided into weathered rock and soft rock. The results of this study are summarized as follows; When piles is reinforced, reinforcing effect of soft rock is 1l-l2% and weathered rock is 233%. In the side load tests of weathered rock, reinforced effect was 223%. From the comparative study, the reinforced piles have enough reinforcing effect. Though some difference existed by foundations, reinforcing effect is reliable. Therefore reinforced deep foundation is profitable in the configuration of the earth.
오픈케이슨기초의 침하촉진을 위한 AIR-JET 공법의 적용성 분석
박진원,류제천,임희대 忠南大學校 産業技術硏究所 2003 산업기술연구논문집 Vol.18 No.2
By air jet method, settlement time was much decreased and settlement was reached even to the depth which conventional method could not. The friction reduction increased more than 20 to 30%. In addition to this merits, air jet method can make caisson settlement without separating loading or increasing dead loads. By this method, size of caisson sections can be reduced for resulting in tremendous cost reduction. Also, caisson damage by blasting can be prevented with this method.