• International Journal of Highway Engineering
• /
• v.9 no.3
• /
• pp.101-110
• /
• 2007

Joint Spacing of Jointed Concrete Pavement has been uniformly designed and constructed as six-meter in Korea. However, engineering backgrounds to show the appropriateness of six-meter Joint Spacing has not been provided. In the on-going reseach of the development of Korea Pavement Reseach Program(KPRP), the optimum Joint Spacing is suggested as 6 to 8 meters according to the regional climatic conditions based on the mechanical-empirical analysis of short-term and long-term pavement distress. This study is a part of the investigation on the adequateness of Joint Spacing design specification suggested in KPRP. Joint Spacing was design and constructed as seven-meter Joint Spacing suggested as design specification in Korea Reseach Program(KPRP) and monitored the Load Transfer Efficiency(LTE), Random crack and compared with those of adjacent $6{\sim}7$ meter Joint Spacing concrete section.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.38 no.1
• /
• pp.113-119
• /
• 2018

An extensive effort is actively being made to implement permeable pavement systems in urban or residential areas of South Korea in order to achieve efficient water circulation system based on low impact development (LID) design concept. This study aims to establish the design factors and procedure for permeable asphalt pavements structural design. Based on the review of previous studies, the 1993 AASHTO design method is found to be adequate for permeable pavements structural design. In this study, the design program based on 1993 AASHTO design procedure in conjunction with domestic roadway design standards was developed to accommodate the characteristics of permeable asphalt pavements. Primary design parameters such as structural layer coefficients of permeable materials were successfully quantified based on literature reviews and parallel analyses. Comparable design thicknesses were obtained between the developed permeable pavement design (PPD) program and Korea pavement research program (KPRP) under different levels of traffic and subgrade load bearing capacity.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.37 no.5
• /
• pp.879-890
• /
• 2017

The US Pavement Design method (AASHTO) and HDM-4, a road pavement maintenance decision system, are not suitable for domestic pavement design, construction and maintenance. KPRP(Korea Pavement Research Program) has been developed to reflect Korea's environmental conditions and vehicle characteristics, thereby, extending pavement life. The main objective of this study is to select the best alternative through Life Cycle Cost $CO_2$ (LCCC) calculations among three representative maintenance strategies using KPRP design software since the environment cost resulting from the extended pavement life will also differ. The analysis of this study illustrates that cumulative carbon emissions for 40 years in alternative 2 (Cutting and Overlaying at Year 30) is the lowest option among them, and the basic cost of $CO_2$ emission by various road maintenance and repair work can be used for suggesting an optimal maintenance strategy for highway agency.

• 한국도로학회지:도로
• /
• v.12 no.1
• /
• pp.53-61
• /
• 2010

• 한국도로학회지:도로
• /
• v.14 no.2
• /
• pp.54-58
• /
• 2012

• Proceedings of the Korea Water Resources Association Conference
• /
• 2016.05a
• /
• pp.317-317
• /
• 2016

저영향개발(Low Impact Development, LID) 시설들은 미국 일본 등 선진국을 중심으로 관련법에 따라 개발 및 적용 되어왔으나 국내에서는 최근에서야 LID 시설을 적용할 수 있는 제도적인 틀을 구축하고 있는 실정이며, 국내 여건에 맞는 LID 시설을 개발하여 그 효용성을 검증하기 까지는 상당한 시간이 소요될 것으로 판단된다. 서울시는 2014년 '서울특별시 빗물관리에 관한 조례 전부개정조례'를 발표함으로써 한국형 LID 시설을 대단위로 적용 하고 검증 할 수 있는 발판을 마련하였다. 서울시의 2014년 전부개정조례에 따르면 시장 및 구청장은 저영향개발 계획 수립의 실효성 확보를 위하여 저영항개발 사전협의 제도를 마련하여 시행하여야 하며, 시장은 저영향개발 지구단위계획을 수립하여야 한다. 이에 따라, 본 연구에서는 실제로 적용 가능한 투수포장 주차장을 설계 할 수 있도록 투수 주차장형 LID 시설을 검증할 수 있는 투수효율성 검증실험단지를 설계 및 구축 하였다. 과거 도심의 우수배제는 중앙 집중형 시스템으로 단기간에 우수를 차집하여 배제하는 방식이었으나, 근래에는 집중형 우수배제 시스템의 위험성, 경제성 그리고 용량한계 등 여러 가지 문제점이 부각되면서 분산형 시스템으로의 전환이 이루어지고 있다. 물순환도시 및 지속가능한 도시 등이 분산형 우수배제 시스템의 예이며, 주차장, 도로, 건물 등 불투수 표면으로부터의 우수를 지면으로 침투 및 침루시키는 방법 등을 활용하여 건전한 물순환을 꾀하고 있다. 침투 및 침루 능력은 각각 포장체 및 포장면 하부구조의 재료와 밀접한 관련이 있으며 재료의 선정은 하부구조의 안정성 확보를 고려하여 선택되어야 한다. 또한 우수 배제를 위한 유공관은 접합점에서 강도를 유지하면서 효율적으로 유수를 배제할 수 있어야 하며, 저류조 설치는 강수의 활용목적에 맞게 선정되어야 한다. 이러한 투수 주차장형 LID 시설은 하나의 시스템으로서 포장체의 재료에 따른 공학적 성질, 하부구조 구축방법 및 재료 선정 그리고 유공관 배열 등에 따라 그 시스템의 거동이 변화하므로 기존에 행해왔던 단순 재료실험으로는 투수성 주차장의 우수배제 시스템을 평가할 수 없다. 따라서 본 연구에서는 이를 검증할 수 있는 투수효율성 검증실험단지 설계 및 구축하였다.

• International Journal of Highway Engineering
• /
• v.10 no.4
• /
• pp.79-89
• /
• 2008

The pavement performance model is the most important factor to determine the pavement life in the mechanistic-empirical pavement design guide (MEPDG). As part of Korean Pavement Research Program (KPRP), the Korean Pavement Design Guide (KPDG) is currently being developed based on mechanistic-empirical principle. In this paper, the rutting prediction model of asphalt mixtures, one of the pavement performance model, has been developed using triaxial repeated loading testing data. This test was conducted on various types of asphalt mixtures for investigating the rutting characteristics by varying with the temperature and air void. The calibration process was made for the coefficients of rutting prediction model using the accelerated pavement testing data. The accuracy of prediction model can be increased when by considering the effect of individual rutting properties of materials rather than shear stresses with depths.

• 한국도로학회:학술대회논문집
• /
• 2009.11a
• /
• pp.519-524
• /
• 2009

• International Journal of Highway Engineering
• /
• v.10 no.3
• /
• pp.129-138
• /
• 2008

The finite element method(FEM) was one of tools used to solve problem of previous Concrete Pavement and was applied to Korea Pavement Research Program Study. This study used the ABAQUS and the fortran analysis program to calculate the critical stress on jointed concrete pavement and compared and analyzed the results by using neural networks and linear regression model. In that case, which are not enough analysises by using FEM programs though many input variables, when the results of FEM with NN and linear regression models are compared, there are some differences. The other cases, which are reduced input variables and a lot of analysises each of them, results of Neural Networks(NN) and linear regression models are simulated to them of FEM. But, the result of NN is more exact than them of linear regression at the (0,0), (1,1). On the results of this study, it is suggested that the calculation of stress using NN is more compatible to Korea Pavement Research Program Study.

• International Journal of Highway Engineering
• /
• v.10 no.3
• /
• pp.11-18
• /
• 2008

In recent, lots of researches for mechanical-empirical design concept for asphalt pavement are on going. AASHTO 2002 Design Guide in USA and KPRP(Korean Pavement Research Program) in Korea are under developing. In these programs, the mechanical properties of hot mix asphalt are a key role for design and analysis. Unfortunately, there is no proper database on the mechanical properties of hot mix asphalt, such as dynamic modulus. The use of dynamic modulus has couple of good advantages which is based on temperature, traffic loading and frequency on pavement. In this research, the verification of the relationship between maximum nominal aggregate size and dynamic modulus has been carried out. Also, test specimen size effect on dynamic modulus has been conducted. Considering the limitation of laboratory testing machine in Korea, test specimen with 100mm diameter and 150mm height is recommended for dynamic modulus test. Also, as the maximum nominal aggregate size increases, the dynamic modulus of hot mix asphalt increases.