PURPOSES : This study aims to provide societal benefits that demonstrate the effectiveness of remodeling projects, thereby providing a basis for activating and systematically and continuously promoting remodeling projects METHODS : Using the International Roughness Index (IRI) and World Bank's HDM-4, a model for vehicle operating costs was estimated. The change in vehicle operating costs was calculated by inputting the pre- and post-remodeling IRI values into the estimated model. Additionally, the future IRI over the life cycle was derived using the results of a study on the changes in pavement conditions between conventional and remodeling methods. The vehicle operating costs for different maintenance alternatives were compared by inputting them into the estimated model. RESULTS : The improvement in road smoothness after the project resulted in an annual vehicle operating cost benefit of approximately 1.6 billion won, with an estimated benefit per kilometer of approximately 64 million won. Furthermore, a comparison of vehicle operating costs for maintenance alternatives over the life cycle revealed that the remodeling method led to savings of 2.1 billion won compared with conventional methods. CONCLUSIONS : The findings of this study will serve as fundamental data supporting the necessity and justification for remodeling projects, particularly in the current scenario, where the need for maintenance of existing roads exhibits a faster growth trend than the extension of new roads. Additionally, this study could be supplemented by further research focusing on the consideration of pavement conditions in unit cost estimation and additional benefit estimation studies tailored to remodeling projects.

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.

PURPOSES : The Korea Expressway Corporation has been working on an early remodeling project for the Jungbu Expressway, to prepare techniques for the rehabilitation of the old CRCP. In this study, a literature review, field survey, and thickness design using MEPGD were conducted. This is to provide a procedure for the pre-treatment, or repair of the existing pavement in the JungBu Expressway. METHODS : To evaluate the pavement condition of the JungBu Expressway, the existing PMS data were analyzed, and field surveys were conducted for each pavement condition. The SMA overlay thickness design was performed using the pavement thickness design program (MEPGD). In addition, the repair procedure was reviewed considering the characteristics of the old CRCP in Korea. RESULTS : From the analysis of existing PMS, field surveys, and laboratory tests, it was discovered that the old CRCP condition of the Jungbu Expressway was not satisfactory. Using MEPDG, the SMA thicknesses for each scenario were proposed as 5, 8, and 10 cm. In addition, appropriate repair procedures for each distress type(punchpout, multiple repair, re-failure, failure of longitudinal joint, etc.) of damaged CRCP in Korea were proposed. CONCLUSIONS : For the remodeling project of the Jungbu Expressway, appropriate repairs should be performed for each type of distress in the old CRCP. In this study, an appropriate overlay thickness and pre-treatment method are suggested.

PURPOSES : Korea Expressway Corporation has been working on an early remodeling project for the Jungbu Expressway to prepare methods for the rehabilitation of the old CRCP(Continuous Reinforced Concrete Pavement). In this study, the distress of the old CRCP was classified, and the engineering properties of the core specimens for each failure type were evaluated. Based on the test results, the concrete conditions of the existing CRCP were evaluated. This provides a basis for the pre-treatment or repair of the existing CRCP in the JungBu Expressway. METHODS : To evaluate the pavement condition of the Jungbu Expressway, existing PMS(Pavement Management System) data were analyzed, and field surveys were conducted for each pavement condition. The longitudinal rebar depth, rebar spacing, horizontal crack, and pavement thickness were examined through core sampling and non-destructive testing. In addition, the core specimens were used to evaluate the compressive strength, chloride penetration test, chloride ion penetration resistance, and freeze-thaw resistance. RESULTS : From the analysis of existing PMS data, field surveys, and laboratory tests, it was found that the old CRCP condition of the Jungbu Expressway was not good. Various types of failures occurred, and horizontal cracks at the rebar location, upward rebar locations, and rebar corrosion were confirmed. In addition, the compressive strength was considerably high, but the durability-related index was judged to be poor. CONCLUSIONS : For the remodeling project of the Jungbu Expressway, appropriate repairs should be carried out for each type of distress in the old CRCP.

목포의 관광명소인 전설의 섬 삼학도는 과거 개발의 시대에 매립되어 육지로 변해버린 곳이다. 그런데 이 삼학도를 섬으로 되돌리고자 하는 시도가 21C 환경시대에 시민들의 노력으로 시작 되게 된다. 삼학도 복원화 사업은 지금도 진행 중이며, 부분적으로 공원 및 공공건축물 등은 개 방되어 이용되고 있다. 본 연구는 삼학도 공원을 대상으로, 현재 진행 중인 복원화 사업을 포함 한 이용현황 및 공간구성 등을 검토하여 개선방안을 제시해보고자 진행된 것이다. 삼학도 원형 복원의 의미와 가치 그리고 섬다움을 느낄 수 있는 리모델링 계획을 수립하였다. 대상지는 목 포 내항과 마주하고 있는 근린공원으로, 면적은 약 454,850㎡이다. 계획추진을 위한 기본방향 은, 1) 삼학도 전설이 꽃으로 피우는 낭만이 있는 안전한 꽃 섬, 2) 어린이와 가족 모두, 1-3세대 가 함께 즐기는 테마가 있는 체험형 공원, 3) 복원된 삼학도의 물길과 숲길을 따라 자연과 사람 이 함께 하는 미래 공존의 숲으로 제시하였다. 계획대상지는 매립으로 이루어진 기존공원 Zone 과 삼학도 원형 복원 Zone으로 크게 구분하였다. 복원된 삼학도는 지역 Identity를 근거로 특화 된 테마를 부여하여 계획하였다. 대삼학도는 ‘학 섬 동산’, 중삼학도는 ‘꽃 섬 동산’, 소삼학도는 ‘꿈 섬 동산’ 으로 공간을 구성하였고, 부여된 이미지가 이용자들에게 쉽게 전달될 수 있도록 계획하였다. 그 외에 공원입구 상징 Zone과 목포내항 해안 Zone을 설정하고, 각각의 공간특성 을 적극 활용하면서도 상호 연계할 수 있는 소공간 및 관련시설 등을 계획 배치하였다. 특히 삼 학도 공원으로 연결되는 매립제방 형태의 도로를 가동식 교량으로 변경하여 삼학도가 섬이라 는 인식과 상징적 의미를 부여하는 진입교량 조성계획은 높은 평가를 받았다. 연구성과로 도출 된 리모델링 계획의 적극적 추진을 통해 삼학도가 다시 목포의 섬으로 되돌아오길 기대한다.

The domestic of modern architectural remodeling method emphasizes simple aesthetic elements, and the correct design and construction methods are not established based on quantitative grounds, thus damaging the value of cultural properties. This study attempts to re-examine the value of modern buildings recognized as old buildings. It is a basic step to present the correct remodeling of the building. The design criteria for exterior wall remodeling of modern buildings were presented. These research results are suitable for energy conservation design standards and can prevent defects in buildings. In the future, more accurate analysis will be required by securing physical property values for various domestic materials through subsequent research.

본 프로젝트는 목포의 대표 관광지이자 시민들의 수변공원이기도 한 평화광장에서 현재 제기되고 있는 이용 및 구조적 문제점 해결을 포함한 리모델링 계획방향 제시를 목적으로 진행된 것이다. 평화광장의 최우선 과제인 공간 구조개선을 위해 ‘보차도 및 녹지 공간조정을 통한 무장애 거리 조성’ 을 목표로 설정하고 구체적인 해결방안을 도출하였다. 광장과 수변을 단절시키는 차도 폐지, 보차도의 높이차 조정 그리고 차량동선 변경으로 수요부족이 예상되는 주차공간확보 등이다. 다음 단계로 대상지역 전체에 대한 리모델링 계획을 추진했다. 대상지의 역사성 및 위치특성을 살려 특화된 4개의 존(zone)으로 구분하고, 서로 다른 역할 및 기능을 부여하는 공간으로 계획하였다. 중심상징 존, 체험 및 동적활동 존, 역사 및 지역문화예술 존, 인접 도시 연계 존 등을 제안하였다. 본 연구대상지인 평화광장은 20년 전 조성되어 현재까지도 많은 사람이 이용하고 있는 공간으로, 당초 시에서는 차도폐지 및 바닥포장 개선이라는 토목사업의 성격으로 추진하고자 했던 사업이었다. 이러한 움직임에 대해 지역 연구자들이 의견을 모아 공간 구조개선 제안 및 광장과 수변공간 전체에 대한 통합적인 리모델링 계획추진을 건의한 결과, 당초의 사업범위를 확대시켜 진행된 프로젝트이다. 따라서 1단계로 목포시의 당면과제를 전제조건으로 우선 해결한 후, 2단계 통상적인 리모델링 계획을 수립하는 방식으로 진행하였다. 단순한 방식의 공사에 불과했던 토목사업을, 사전 제안을 통해 종합프로젝트 방식의 리모델링 사업으로 이끌어냈다는 점에서 본 연구는 의미있는 작업이 되었다.