본 연구에서는 국내 아스팔트 도로 현장에서 발생한 동절기 도로융기 현상의 발생 원인을 현장 규명하고 동결융해 피해를 보수하고 자 현장조사, 현장 LFWD실험 및 포장 코어채취, 지하수위 측정, 기상데이터 및 설계자료 분석 등을 실시하였다. 본 연구의 동상 원인 분석은 추후 동결융해 피해 재발방지를 위한 적정한 보수보강공법을 선정하기 위해 수행하였다. 분석과정은 지하수위 상승에 의한 동 상피해 가능성, 동결깊이 과소설계에 의한 동결융해 가능성, 포장면 표면수 유입에 의한 동결융해 가능성, 도로 외측 비포장면을 통한 수분유입과 이에 의한 동결융해 가능성으로 조사하여 동상 원인을 파악하였다. 또한 현장에서 소형충격 재하시험 LFWD(Falling Weight Deflctometer)시험을 하여 포장의 구조적 지지력을 측정하여 얻은 처짐값을 통해 포장체 구조적 능력을 분석함과 동시에 도로융기와의 연관성을 파악하여 균열분석 결과를 함께 분석하고 보수방법을 제안하였다.

PURPOSES : This study proposes a framework for promoting future expressway remodeling projects by reviewing similar overseas cases and comparing them with current Korean expressway remodeling projects. METHODS : Based on a literature review, this study examines the major issues in expressway remodeling projects and proposes the development of a framework for establishing and promoting such projects. This framework provides detailed guidance by categorizing the project into legal system adjustments, traffic management plans, and social consensus. RESULTS : The diagnosis of issues in domestic expressway remodeling projects revealed significant problems in conceptual aspects, criteria for project evaluation, formulation of traffic diversion strategies, and deficiencies in related legal frameworks. To address these issues, a framework for advancing future remodeling projects was established based on the results of overseas case studies. CONCLUSIONS : As roads deteriorate, the demand for remodeling projects to restore them increases. However, the current implementation of remodeling projects lacks systematic procedures. This study serves as foundational research for establishing an environment conducive to the smooth progress of such projects. By initiating subsequent research, conditions for the smooth progress of remodeling projects are expected to be established.

Asphalt concrete(Ascon) is used to repair potholes and cracks. Special truck-mounted cargo boxes transport 200℃ asphalt concrete to repair potholes and cracks. However, long working and transportation hours to repair wide roads decrease the temperature of the asphalt concrete inside the cargo boxes. If the asphalt concrete temperature drops below 170℃, the adhesion with roads that need repair decreases. Therefore, the temperature of the asphalt concrete needs to be maintained for a long time. Conventional asphalt concrete cargo boxes are mostly burner-type models using hot air to prevent the temperature of the asphalt concrete from dropping. However, there are significant temperature differences between the asphalt concrete near and far away from the hot air, so the temperature decreases over time and leads to the disposal of large amounts of asphalt concrete. This causes waste of resources and environmental pollution. Therefore, this study proposed a heat dissipation cut-off type cargo box model to solve this problem and demonstrated its performance over conventional burner-type models through tests and analysis.

PURPOSES: Pavement Management System contains the data that describe the condition of the road. Under limited budget, the data can be utilized for efficient plans. The objective of this research is to develop a mixed integer program model that maximizes remaining durable years (or Lane-Kilometer-Years) in road maintenance planning. METHODS: An optimization model based on a mixed integer program is developed. The model selects a cluster of sectors that are adjacent to each other according to the road condition. The model also considers constraints required by the Seoul Metropolitan Facilities Management Corporation. They select two lanes at most not to block the traffic and limit the number of sectors for one-time construction to finish the work in given time. We incorporate variable cost constraints. As the model selects more sectors, the unit cost of the construction becomes smaller. The optimal choice of the number of sectors is implemented using piecewise linear constraints. RESULTS: Data (SPI) collected from Pavement Management System managed by Seoul Metropolitan City are fed into the model. Based on the data and the model, the optimal maintenance plans are established. Some of the optimal plans cannot be generated directly in existing heuristic approach or by human intuition. CONCLUSIONS: The mathematical model using actual data generates the optimal maintenance plans.

This Study reviewed the case of Gyeonggi-do province which recently induced Drone to pavement management system in order to research a plan to utilize recent technology Drone to pavement management system which is being operated depending on vehicles and manpower for 30 years. After filming video on local roads managed by Gyeonggi-do province by using Drone directly and created point cloud having three dimensional coordinate and color value through program analysis. Furthermore, this research showed that when we found similar color to point cloud at pavement crack part and applied color, crack part was detected.

In the Gangwon province, severe freezing damage to road tunnels are occurred due to freezing condition such as snowfall, cold waves and icing. As a result, serious damage occurs on the lining and road surface of the tunnel entrance and exit. Therefore, it is necessary to develop appropriate mitigation methods to protect damage to people and property by freezing. In this paper, we introduce that the trend of research for reducing the freezing damage and the required performance to be secured for the maintenance of road tunnels in cold region and the future research plans.

In the Gangwon province, severe freezing damage to road tunnels are occurred due to freezing condition such as snowfall, cold waves and icing. As a result, serious damage occurs on the lining and road surface of the tunnel entrance and exit. Therefore, it is necessary to develop appropriate mitigation methods to protect damage to people and property by freezing. In this paper, we introduce that the trend of research for reducing the freezing damage and the required performance to be secured for the maintenance of road tunnels in cold region and the future research plans.

In this study, we use the general national road's bridge format information to carry out the efficient maintenance services. Especially maintenance method of the operating new-type girder bridges is treated by collecting the information of them

This study is for statistical analysis of road barriers by the highway-side. It is found there are various types of road barriers, and also most of them are reinforced concrete walls and reinforced earth walls. This statistics data will be helpful to road barriers’ maintenance field.

To the present, technology of tunnel has developed more significantly than before. Due to the difficulty in assessment of long-term durability, it is more important to persistently maintain the tunnel to save the budget efficiently since its completion. Some aspects of the focused management section were written for some of the road tunnels which was recently inspected by KISTEC according to the special law for safety management of Infrastructure.

For efficient maintenance management of load facilities, an establishment of asset management system is necessary which helps prediction of maintenance cost and strategic allocation of budget in consideration of toy priority. The main purpose of this study is to suggest asset valuation method, which is practical in conformity with domestic situations, through researches on asset valuation method of load facilities. As a consequence, the management and maintenance system of existing highway facilities needed an innovation involving the concept of asset management. This study discusses the new facility management system suitable to local highway agencies. The new system incorporates asset management concept so that it can analyze the project level facility management solution and it can also improve the budget efficiency for local government. This study also presents systematic method to integrate various facilities for management system.

The newly-developed self-mobilizing space frame system is the equipment possible to adjust frame width and height per various road tunnel sizes. Main purpose of this system is to maintain road tunnels without blocking lanes. Therefore, it does not affect traffic and completes maintenance work quickly as compared to current method.

생애주기비용을 고려한 교량의 설계 및 유지관리에 있어서, 점검진단, 보수보강 등에 소요되는 직접적인 비용뿐만 아니라 간접적인 비용인 도로이용자비용은 중요한 비용항목으로 고려되고 있다. 직접비용과 비교하여 상대적으로 추정이 곤란한 도로이용자비용의 추정을 위하여 우회도로의 효과를 고려한 이용자지연비용과 차량운행비용의 정식화를 수행하고, 시간지체에 따른 도로이용자비용의 추정을 위한 회귀모델 개발을 위하여 교통해석과 회귀분석을 수행하였다. 개발된 회귀모델을 생애주기 비용 및 성능 기반 유지관리 전략 수립에 적용하여 도로이용자비용이 생애주기분석에 미치는 영향을 분석하고, 개발된 모델의 적용성에 대해서 고찰하였다. 도로이용자비용은 생애주기분석에 기초한 유지관리전략수립에 큰 영향을 미치며, 개발된 회귀모델은 교량의 도로이용자비용의 추정에 실용적으로 활용될 수 있을 것으로 판단된다.