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역학적-경험적 설계를 기반으로 한 아스팔트 포장 등가단축하중계수 및 단면 두께 간편 설계식 개발: 제주도 사례연구 KCI 등재

Development of an Equivalent Single-axle Load Factor and Thickness-design Equations for Asphalt Concrete Pavements based on the Mechanical-empirical Design Concept: A Case Study for Jeju

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한국도로학회논문집 (International journal of highway engineering)
한국도로학회 (Korean Society of Road Engineers)
초록

The purpose of this study was to optimize the design of asphalt concrete pavements for Jeju Island by considering the regional characteristics of the island. This study employed an MEPDG program to determine the allowable traffic loads for class 4 vehicles by considering the axle loads, climate, and material properties. Samples of basalt asphalt concrete from Jeju were used to measure the dynamic modulus for material property estimation. The climate input was based on 30-year climate data from Jeju. The thicknesses and moduli of the subgrade, subbase, and asphalt layers were incorporated into the design. The regression-analysis program SPSS was used to develop a regression equation for the overlay design, factoring in the modulus and thickness ratios between the existing and overlay asphalt layers. A pavement-thickness design formula tailored to Jeju's characteristics was derived. An equivalent single-axle load factor (ESALF) formula was developed to facilitate traffic-load estimation for different roads, enabling the easy incorporation of varying traffic volumes into the design. The ESALF formula demonstrated a high correlation with the pavement thickness, subgrade conditions, and axle loads, whereas the pavementthickness design formula exhibited strong correlations with the pavement thickness, subgrade state, thickness ratios, and modulus ratios. The use of basalt aggregates in asphalt concrete pavements provides an economically viable and technically sound solution for Jeju. The proposed design methodology not only reduces costs but also enhances pavement performance and road safety. The developed formulas offer flexibility in adjusting designs based on specific traffic conditions, providing optimal pavement solutions for different road categories.

목차
ABSTRACT
1. 연구배경 및 목적
2. 등가 단축 하중과 역학적-경험적 설계 개요
    2.1. 등가단축하중(ESAL)과 등가단축하중계수(ESALF)
    2.2. 역학적-경험적 설계
3. 설계 입력변수 산정
    3.1. 도로포장 재료 물성 입력변수 산정
    3.2. 교통량 : 축하중 입력변수 산정
    3.3. 기후 입력변수 산정
    3.4. 포장 구조 조건 산정
4. 제주형 설계식 개발
    4.1. ESALF 설계식 개발
    4.2. 아스팔트 콘크리트 전단면 및 덧씌우기 설계식 개발
    4.3. 설계식 검증
5. 결론
REFERENCES
저자
  • 이준식(세종대학교 공과대학 건설환경공학과 박사과정) | Lee Jun Sik
  • 백철민(한국건설기술연구원 도로교통연구본부 수석연구원) | Baek Cheolmin (Senior Researcher Department of Highway and Transportation Research, Korea Institute of Civil Engineering and Building Technology 283, Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 10223, Korea) Corresponding author