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안중관(Jung-Kwan Ahn),정장방(Jang Bang Jeong),김철도(Cheol Do Kim) 국립공원연구원 2015 국립공원연구지 Vol.6 No.4
다도해해상국립공원 내 해초류 분포 및 개체군 특성을 조사하였다. 거머리말(Zostera marina)은 다물도, 흑산도 배낭기미, 도초도 시목, 관매도, 소안도, 거문도에서 분포하였고, 애기거머리말(Z. japonica)은 하조도 동구섬과 세목 그리고 외래 유입종으로 알려진 해호말(Halophila nipponica)은 거문도에 분포하였다. 거머리말 밀도는 거문도(333 ± 177 shoots/m2)에서 가장 높았으며, 흑산도 배낭기미(215 ± 29 shoots/m2)에서 낮았고, 하조도의 애기거머리말은평균 밀도 1,425 shoots/m2, 거문도의 해호말의 평균 밀도는 576 shoots/m2로 나타났다. 거머리말의 형태학적 특징은 조사정점에 따라 서로 상이하게 나타났다. This study was distribution characteristics of seagrasses at Dadohaehaesang National Park. Zostera marina was distributed in Damuldo, Beanangkimi, Simol, Gwanmado, Soando and Geomundo. Z. japonica was distributed in Hajodo (Donggusum and Seomok). Halophila nipponica was distributed in Geomundo. The most average density of Zostera marina were found at Geomundo (333 ± 177 shoots/m2), Soando (320 ± 86 shoots/m2), while the fewest were found at Beanangkimi (215 ± 29 shoots/m2). The most average biomass was 570 g DW/m2 at Gwanmaedo, fewest at Simok (167 g DW/m2). Morphological characteristics of Zostera marina were different depending on the region. The average density of Z. japonica was 1,425 shoots/m2 at Hajodo. The average density of Halophila nipponica was 576 shoots/m2 at Geomundo.
이일화(Lee Il-Wha),이성진(Lee Sung-Jin),이수형(Lee Su-Hyung),방의석(Bang Eui-Seok),정장용(Jung Jang-Yong) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The problems associated with constructing high-speed concrete track embankments over soft compressible soil has lead to the development and/or extensive use of many of the ground improvement techniques used today. Drains, surcharge loading, and geosynthetic reinforcement, have all been used to solve the settlement and embankment stability issues associated with construction on soft soils. However, when time constraints are critical to the success of the project, owners have resorted to another innovative approach. Especially, the design criteria of residual settlement is limited as 30mm for concrete track embankment, it is very difficult to satisfy this standard using the former construction method. Pile net method consist of vertical columns that are designed to transfer the load of the embankment through the soft compressible soil layer to a firm foundation and one or more layers of geosynthetic reinforcement placed between the top of the columns and the bottom of the embankment. This paper will present the guidelines for the design of pile net method to supported embankments. These guidelines were developed based on a review of current design methodologies and a parametric study of design variables using numerical modeling.