Since the 1970s, construction projects of SOC infrastructure have began rapidly. therefore, it is expected that the proportion of infrastructure using for more than 30 years will be increased in an instant. Because an aging infrastructure can greatly damage the national economy and people, maintenance of the infrastructure is essential. In this paper, performance-based evaluation items for maintenance of SOC(Social Overhead Capital) infrastructure and the process of calculating the weights of each items by using the AHP(Analytic Hierarchy Process) method are introduced.

This research project is to be carried out to propose the methodologies for improving the structural maintenance system by performance concepts consideration. The main contents of this project are performance(Safety, Durability, Serviceability etc) based management methodology. If this project is performed successfully, it is expected that the infrastructures can be effectively managed in Korea.

In this study, we conducted a pilot basis for the census debris flow hazard zone is located on the roadside in some national road. Valley part by usage data for 154 points by calculating the risk and damage was also selected for the debris flow prevention research priorities. This databased to be able to systematically manage a debris flow that may occur on the national roadside.

In this paper, the strategy of the research project was introduced to develop the safety evaluation factors and the monitering system of underground lifelines against the ground subsidence. This study will be carried out in three steps of concept design, critical technique development and technique verification.

This research project is to be carried out to propose the methodologies for improving the structural maintenance system by performance concepts consideration. The main contents of this project are performance based management methodology, report card for infrastructures etc. If this project is performed successfully, it is determined that the infrastructures can be effectively managed in Korea.

In this study, evaluation factors(internal and external) and research plan for slopes were introduced to develop the performance-based slope evaluation methodology along the road and railroad. This study will be conducted in three stages of concept design, critical technique development and technique verification.

In this paper, internal and external research trends and plans related to development of performance–based evaluation methodology for structures in use was introduce to deal with the various problems due to the aging of the domestic SOC(Social Overhead Capital) facilities preemptively.

The in-depth inspection and maintenance process is based on the ‘Special Act on the Safety Control of Public Structures’ and accompanied specific guide. They prescribe the evaluation standard for physical condition and safety on structures. Recently we are faced with the threat coming from the aging of structures and external condition such as climate change. In this study, sustainable and long-term maintenance strategy is derived.

In general, protection and reinforcement measures on cut slope are often focused natural slopes to slope design are considered as slopes of safety. In this study, stability analysis is carried out and the differences to the factor were safety based on cases of analyzed erosion and surface collapse on boundary between Cut slope and Upper natural slope.

Miscanthus sacchariflorus var. No. 1 has been newly developed in Korea. This study was conducted to assess the feed value of M. sacchariflorus var. No. 1 at different growth and harvesting time. Total 3 different miscanthus - 1y4m (first shoot and harvested at 4 month), 2y4m (second shoot and harvested at 4 month) and 2y8m (second shoot and harvested at 8 month). Two experiments were carried out, In vitro rumen simulated fermentation and In situ dry matter digestibility (DMD). Ruminal pH at in vitro fermentation were higher in M. sacchariflorus var. No. 1 treatments compared to the rice straw (RS). In volatile fatty acid production, 1y4m resulted in higher acetate production than the other M. sacchariflorus var. No. 1 at higher maturity stages. Significant differences among treatments were observed in propionate and total volatile fatty acid (VFA) productions at 9, 24 and 48 h of incubation times. Higher ammonia nitrogen productions were found as increased maturity of M. sacchariflorus var. No. 1. At In situ experiment, high DMD was detected in the order of RS (60.51%) > 1y4m (57.65%) > 2y4m (57.63%) > 2y8m (46.28%). The results from this study indicate that young and early harvested M. sacchariflorus var. No. 1 are able to improve its nutrient values in the ruminant animal.

최근 많은 연구를 통해 비탈면의 우기시 안정성 검토 방법이 기존의 해석 방법에 비해 강우를 고려한 침투해석이 보다 경제적이고, 현실적이라는 주장이 제기되고 있다. 최근 개정된 건설공사 비탈면 설계기준에서도 보다 현실적인 안정성 검토를 위해우기 시 강우를 고려하여 침투해석을 실시할 수도 있게 개정되었다. 그러나 침투해석 과정에는 지반의 불투수특성과 강우강도등 고려되는 인자들로 인해 그 과정이 복잡하다는 애로사항이 있다. 본 연구에서는 침투해석을 이용한 보다 효과적인 안정성 검토 방법을 제시하기 위해 흙의 종류와 지속강우 특성에 따른 침투 조건을 변화시켜 일반적인 침투양상을 파악하였다. 그 결과를 이용하여 지표면까지 포화된다는 가정하에 해석을 실시할 수 있는 조건을 제시할 수 있었다.

This case study is an inspection and improvement case for monitoring system of airside-settlement in incheon international airport, it is to identify the installation and operational issues by investigation for physical, functional defects of running monitoring system and various instruments and it is to determine the safety and damage state of airside facility by the analysis of measured data. Also, we propose the improved measurement plan to satisfy durability, reliability and efficiency.

The slope adjacent to the road, when it is difficult to observe the shape and if not at the bottom of the upper slopes or steep high due to the presence of the upper slopes of the exact visual inspection is difficult, there is a direct investigation lengthy complaints. In this study, the disadvantages of having the inspection personnel based complementary and mixed low-cost single global region is the number of slope maintenance and safety can be managed efficiently so that helicopters and hexa mobile survey vehicle was developed. Equipment developed difficulties in spatial or temporal slope Visually inspect efficient investigation to be able to support. Survey vehicle computer to the Internet environment because it contains Slope check immediately to determine test results sent to the Center, and the efficient maintenance can be performed.

In terms of the indicators by the type for the landscape plan per the district nit, geographic ecology indicators were the items such as water, water system, topography and climate, while biological ecology indicators were the items such as green zone size, green zone ratio, biotope size and distribution. The sensory and visual indicators were the items such as view point, view axis and skyline, and the accessibility indicator items for the green zone were applied as the socially used indicators. As for the application method according to each indicator, the water or water system was expressed and applied through the slopes and elevation topographic analysis drawings, the climate was expressed and applied through the main direction of the wind and the cold wind pass alley drawings. As for the green zone size and green zone ratio, the land use according to the status and housing area development was compared to present the measured figures. In case of the biotop size and the distribution item, the range was limited to the preparation of the biotope drawings for the focused preservation. As for the view point and view axis, the view point was selected according to the view point to prepare and apply the view analysis drawing in which the view area to be preserved is analyzed. As for the skyline, its landscape photo was composed with the housing area shape, and then skyline photography was applied as the plan in order to propose and consider the various shapes of the skyline. As for the accessibility to the peen zone, the network drawing was drawn to reflect the users' accessibility and continuity of the green zone formed and preserved according to the land use plan and then the drawing was prepared and proposed as the applicable plan.