• 제목/요약/키워드: jointed plain concrete pavement (JPCP)

검색결과 9건 처리시간 0.022초

Multiple Regression Technique for Productivity Analysis of the Jointed Plane Concrete Pavement (JPCP)

  • Yoo, Wi-Sung
    • 한국건설관리학회논문집
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    • 제9권6호
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    • pp.268-276
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    • 2008
  • In highway construction projects, concrete pavement productivity has been challenged with constructors and decision-makers; at present there are few methods available to accurately evaluate the factors impacting on it. Any inefficient method to analyze it leads to the excessive schedule, higher rehabilitation costs, shorter service life, and reduction of ride quality. To implement these negative outcomes, constructors or decision-makers need a systematic tool that can be used to categorize the factors related to construction productivity. This paper applies multiple regression technique for productivity analysis of the Jointed Plane Concrete Pavement (JPCP), identifies the significant factors, and provides a predictive model assisting in monitoring and managing the productivity of the JPCP construction process. The completed and progressive projects are employed to derive and assess the proposed model. The results are analyzed to illustrate its capabilities.

Comparative study of flexural stress estimation methods in concrete pavement considering tied concrete shoulder

  • Jeetendra S. Khichad;Rameshwar J. Vishwakarma;Samadhan G. Morkhade;Siddharth Mehndiratta
    • Structural Engineering and Mechanics
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    • 제90권2호
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    • pp.177-187
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    • 2024
  • In this study, compared two distinct estimation methods (stress charts and regression equations) proposed by the Indian road congress design guideline (IRC:58-2015) to determine flexural stress in Jointed Plain Concrete Pavement (JPCP). The occurrence of critical flexural stresses in pavement slabs is due to the combined effects of wheel loads and temperature. These stresses depend on various factors such as material properties of concrete, soil-subgrade strength, loading, and geometric properties of the slab. In order to account for the practical variability of these factors, critical edge stresses are determined using both methods and compared considering tied concrete shoulder. IRC:58 (2015) suggests, the stresses calculated by both the procedures should provide the same results. However, when these stresses are compared for the same configurations and same loading conditions, large variations are observed. The effect of tied concrete shoulder on reduction in critical edge stress is observed. Based on the study, certain important conclusions and recommendations are presented.

노후 줄눈 콘크리트 포장 보수를 위한 얇은 연속 철근 콘크리트 덧씌우기 포장의 초기거동 평가 (Early Age Behavior of Thin Bonded Continuously Reinforced Concrete Overlay on Aged Jointed Plain Concrete Pavement)

  • 류성우;남정희;김기헌;조윤호
    • 한국도로학회논문집
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    • 제11권2호
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    • pp.121-132
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    • 2009
  • 본 연구에서는 노후 콘크리트 포장의 효율적 유지보수를 위하여 국내 최초 적용된 Thin Bonded Continuously Reinforced Concrete Overlay (CRCO) 공법의 초기 공용성이 평가되었다. 서해안 고속도로의 표층 파손 구간에 Jointed Plain Concrete Pavement (JPCP) 덧씌우기와 CR8O 공법을 이용한 보수가 진행되었다. JPCP 덧씌우기 공법이 적용된 구간에서는 인접 슬래브가 완전히 분리되도록 덧씌워진 층의 줄눈을 완전히 커팅하였으며, CRCO 공법이 적용된 구간에서는 0.5% 종방향 철근과 위치 고정용 횡방향 철근을 설치한 후 그 위에 덧씌우기를 수행하였다. 두 구간 모두에서 3종시멘트가 이용되었다. 현장 강도 시험 결과, 1$\sim$3일 내에 교통개방이 가능한강도가 발현된 것이 확인되었으며, vibrating wire gauge (VWG) 데이터 분석 결과 CRCO 공법이 기존 포장의 줄눈 거동을 억제하는 것으로 나타났다. 부착강도 시험결과, 재령에 상관없이 높은 부착강도가 확인되었다. 한편 JPCP 덧씌우기 공법이 적용된 구간에서는 중앙부에서, CRCO 공법이 적용된 구간에서는 CRCO 포장과 같은 무작위 횡방향 균열이 관찰되었으며, CRCO 공법의 균열폭 거동이 JCP 보다 50% 정도 낮은 것으로 나타났다.

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인천국제공항 줄눈콘크리트 슬래브의 초기재령 특성분석 (Analysis of Early-age Property of JPCP Slab of Incheon International Airport)

  • 썬런쥬안;정진훈;천성한;임진선
    • 한국방재학회:학술대회논문집
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    • 한국방재학회 2007년도 정기총회 및 학술발표대회
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    • pp.335-339
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    • 2007
  • 줄눈콘크리트 슬래브의 초기 재령특성 분석을 위하여 인천국제공항 건설 현장에 설치된 슬래브에 온도와 습도를 측정 후 해석하였다. 성숙도 방법을 이용하여 결정한 콘크리트 슬래브의 초기경화시간은 콘크리트 타설 후부터 약 2시간 40분이었다. 콘크리트 슬래브 변형률의 변화는 초기경화 시간 이후부터 시작되었고, 이는 센서가 설치된 각 위치와 깊이에서 서로 다른 값을 나타냈다.

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일반국도의 교통소음특성에 관한 연구 (A Study of Traffic Noise Characteristics on the National Highways)

  • 손현장;안덕순;백철민;권수안;이재준
    • 한국도로학회논문집
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    • 제15권2호
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    • pp.11-18
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    • 2013
  • PURPOSES : This study presents the noise level and frequency characteristics investigated in the national highways with the consideration of various measuring conditions and/or methods. METHODS : The noise levels on the asphalt concrete pavement(ACP) and the jointed plain concrete pavement(JPCP) of the national highway were measured and analysed with respect to three variables, i.e., pavement type, surface condition, and measurement distance. The PASS-By method is utilized for the noise measurement and then using CPB spectrum analysis method with 1/3 octave bandwidth, the noise levels and frequency characteristics were calculated for two-second periods before and after the peak noise. RESULTS : Depending on the pavement type, the noise level was changed as the average noise levels are 73.3dB(A) and 78.3dB(A) for ACP and JPCP, respectively. With respect to the effect of surface condition, the average noise levels for crack H(high), M(medium), and L (low) sections are 77.4dB(A), 77.4dB(A), and 78.1dB(A), respectively. Regarding the measurement distance, 1.2meter difference in measuring location reduces 1.6dB(A) of noise level; the average noise levels at 5.3m and 7.5m from the centerline of outer lane are 72.8dB(A) and 71.2dB(A), respectively. It should be noted that the noise levels are slightly different as a function of vehicle speed and type. However, the overall trends for each case was similar. It was found that the domain frequency bands for ACP and JPCP were 400Hz~2000Hz and 500Hz~2000Hz, respectively. CONCLUSIONS : Based on the analysis with the measured noise date from national highway, it was concluded that the noise level and frequency band vary depending on the various conditions. It was also found that some variables significantly affect the noise level while others do not. With further systematic investigation, the comprehensive noise characteristics on the national highway can be achieved. Using such database, it is possible to develop the fundamental noise reduction technology.

줄눈 콘크리트 포장의 줄눈강성 산정 연구 (Joint Stiffness Evaluation in Jointed Plain Concrete Pavement)

  • 전범준;이승우;권순민;김성민
    • 대한토목학회논문집
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    • 제29권1D호
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    • pp.49-54
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    • 2009
  • 줄눈 콘크리트 포장에 있어 줄눈부의 하중전달은 다웰바, 골재맞물림, 하부지반의 강성에 의해 발현된다. 콘크리트 포장의 합리적인 역학적 해석을 위해서는 이러한 사항을 적절하게 모델링할 필요가 있다. 줄눈부 하중전달율은 일반적으로 줄눈부에 전단스프링으로 모델링 할 수 있다. 하지만 줄눈부 하중전달이 포장 공용성에 지대한 영향을 미치고 있음에도 위 세가지 모두를 고려한 줄눈부의 줄눈강성(Joint Stiffness)에 대한 연구가 이루어 지지 않아 콘크리트 포장 설계시 적정 줄눈강성값을 적용시키지 못하고 있는 실정이다. 본 연구에서는 국내 콘크리트 포장 여건에 적합한 줄눈부 전단 스프링의 입력요소인 줄눈강성(다웰바, 하부지반, 골재맞물림 고려)을 산정하고자 한다. 이를 위해 FWD(Falling Weight Deflectometer)를 이용하여 구한 하중전달율(LTE)에 대해 하부지반 및 다웰바 설치유무에 따른 국내 주요 고속도로 및 시험도로의 데이터를 수집하였다. 또한 국내 포장조건을 고려한 구조해석자료를 통해 하부 지반 조건 및 다웰바 유무에 따른 줄눈부의 줄눈강성을 산정하였다. 이 두 가지를 통해 현장의 하중전달율 데이터와 비교분석하여 다웰바 유무, 하부지반 조건별 영향인자에 대해 온도 및 재령을 고려한 국내 조건에 적합한 줄눈강성 산정식을 제시하였다.

Evaluating the performance AASHTOWare's mechanistic-empirical approach for roller-compacted concrete roadways

  • Emin Sengun
    • Computers and Concrete
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    • 제33권4호
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    • pp.445-469
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    • 2024
  • The Federal Highway Administration (FHWA) has recommended the use of AASHTOWare Pavement Mechanistic-Empirical Design (PMED) software for Roller-Compacted Concrete (RCC) pavement design, but specific calibration for RCC is missing. This study investigates the software's capacity to predict the long-term performance of RCC roadways within the framework of conventional concrete pavement calibration. By reanalyzing existing RCC projects in several U.S. states: Colorado, Arkansas, South Carolina, Texas, and Illinois, the study highlights the need for specific calibration tailored to the unique characteristics of RCC. Field observations have emphasized occurrence of early distresses in RCC pavements, particularly transverse-cracking and joint-related issues. Despite data challenges, the AASHTOWare PMED software exhibits notable correlation between its long-term predictions and actual field performance in RCC roadways. This study stresses that RCC applications with insufficient joint spacing and thickness are prone to premature cracking. To enhance the accuracy of RCC pavement design, it is essential to discuss the inclusion of RCC as a dedicated rigid pavement option in AASHTOWare PMED. This becomes particularly crucial when the rising popularity of RCC roadways in the U.S. and Canada is considered. Such an inclusion would solidify RCC as a viable third option alongside Jointed Plain Concrete Pavements (JPCP) and Continuously Reinforced Concrete Pavements (CRCP) for design and deployment of rigid pavements. The research presents a roadmap for future calibration endeavors and advocates for the integration of RCC pavement as a distinct pavement type within the software. This approach holds promise for achieving more precise RCC pavement design and performance predictions.

줄눈 콘크리트포장의 프로파일 데이터를 이용한 슬래브의 컬링형상 추출기법 개발 (Development of Extraction Method of Slab Curling Shape of jointed Concrete Pavement Using Profile Data)

  • 전범준;이승우;문성호
    • 한국도로학회논문집
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    • 제10권4호
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    • pp.9-18
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    • 2008
  • 줄눈 콘크리트포장(JCP-Jointed Concrete Pavement)의 경우 포장단면 온 습도차에 의해 슬래브 내의 컬링이 발생하게 된다. 컬링에 의해서 발생하는 슬래브의 휨 형상 및 크기는 포장내 응력 및 평탄성에 영향을 미치기 때문에 포장의 구조적, 기능적 성능에 중요한 영향을 줄 수 있다. 슬래브의 휨 형상을 직접 측정하는 것은 시공초기에 포장내에 다량의 계측기를 매설하여야 하며, 시공초기부터 거동의 정교한 측정이 필요하고 고가의 실험비용 및 기술적 인 어려움을 갖고 있다. 본 연구에서는 현장에서 손쉽게 획득할 수 있는 프로파일 데이터(Profile Data)에 파워 스펙트럼 분석(Power Spectrum Density Analysis) 및 역 푸리에 변환(Inverse Fast Fourier Transform) 기법 등을 적용하여 임의의 시간에서 줄눈 콘크리트포장의 슬래브 휨 형상을 측정하는 방법을 개발하였다. 개발한 기법의 실효성을 검증하기 위하여 국내 중부내륙에 위치한 시험도로 줄눈 콘크리트 포장에서 시간대별 프로파일을 측정하고 이 데이터로부터 슬래브 휨 형상을 도출하여 그 결과를 검토하였다. 또한 동 시간대의 연속철근 콘크리트포장(CRCP- Continuous Reinforced concrete Pavement) 구간에서의 프로파일 데이터를 분석하고 이를 줄눈 콘크리트포장에서의 결과와 비교하여 개발한 슬래브 휨 형상 추출기법의 타당성을 검증하였다.

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줄눈콘크리트 포장의 줄눈 거동 측정 (Field Measurements of Joint Movements at JPCP)

  • 윤경구;김동호;홍창우;이주형
    • 산업기술연구
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    • 제21권B호
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    • pp.325-330
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    • 2001
  • In this research, the early-age movements of joint at JPCP(Jointed Plain Concrete Pavement) were measured by field tests. The field tests were carried out for 5 days just after concrete placement, for 1 day after 52 and 72 days on Chung-Ang Expressway construction site in Dan-yang on the 28th and 29th of May 2001. The joint movements were measured by demec gauge and clip gauge. The results of regression analysis for the data measured during early 5 days showed that the joints of No.4, No.5, No.6, No.10, No.13, and No.15 could be considered as a moving joint. From data analysis on july 20, the joints of No.2, No.9, and No.10 showed the significant correlations from the minus value of coefficient of regression. As a result of regression data on August 8, joint movements occurred at all joints. Joint freezing and closure could be judged from the regression analysis using joint opening and total temperature measured at field tests.

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