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장기계측을 통한 JCP와 접하는 국내 CRCP의 팽창줄눈 변위 조사 KCI 등재
Monitoring Long-Term Displacement of CRCP Expansion Joints Connected with JCPs at Domestic Expressway
pp.33-40
This study measured the displacement that occurs when applying expansion joints between the jointed concrete pavement (JCP) and continuously reinforced concrete pavement (CRCP) on domestic expressway and obtained the basic data necessary for the rational design of expansion joints. Displacement gauges were installed at the ends of the CRCP expansion joints, and the longitudinal displacements were measured for five years to derive daily and seasonal displacements, which were compared with the results obtained at the JCP and anchor lug ends. The expansion joints of the CRCP terminal ends were observed to have initially expanded by 5.8 and 5.9 mm. The daily displacements were 0.024 and 0.034 mm/℃ on average, and the seasonal displacements decreased rapidly with an increase in distance from the CRCP ends. In addition, the displacements at locations 50–150 m away exhibited behaviors that were inversely proportional to the temperature, suggesting that they were more affected by the surrounding cracks. The seasonal displacement measured at the end of the CRCP expansion joint was 0.0292–0.0701 mm/℃. The displacement occurring at the end of the domestic CRCP expansion joint was estimated to consist of short-term expansion and seasonal displacements and was lower than when the asphalt separation layer was used. This was because the surface behavior was strongly suppressed below the lean concrete layer. Therefore, continuous observation is necessary, as different trends may be observed according to the increase in CRCP thickness.
1. 서론
2. 시험구간 및 계측방법
2.1. 시험구간 개요
2.2. 변위계측 방법
3. 공용 초기 팽창줄눈 단부의 변위
3.1. 공용 초기 CRCP 팽창줄눈 단부변위
3.2. 공용 초기 JCP 팽창줄눈 단부변위
4. 팽창줄눈 단부의 장기변위
4.1. CRCP 팽창줄눈 단부의 장기변위
4.2. JCP 팽창줄눈 단부의 장기변위
5. 결론
REFERENCES
