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Evaluation on the Effect of Depth Buried Pipeline and Refilling Materials on Pavement Performance

도로하부 매설관의 매설심도 및 되메우기 재료가 포장체에 미치는 영향 평가

  • Received : 2013.03.14
  • Accepted : 2013.04.01
  • Published : 2013.04.15

Abstract

PURPOSES : Compared to the criteria from advanced countries, Korea has conservative criteria for the buried depth of pipeline (about 30~70cm deeper) causing the waste of cost and time. Therefore, this research investigated the effect of various buried depths of pipeline on pavement performance in order to modify the criteria to be safe but economical. In addition, a recycled aggregate which is effective in economical and environmental aspect was evaluated to be used as a refilling material. METHODS : In this study, total 10 pilot sections which are composed with various combinations of pavement structure, buried depth of pipeline, and refilling material were constructed and the telecom cable was utilized as a buried pipeline. During construction, LFWD (Light Falling Weight Deflectometer) tests were conducted on each layer to measure the structural capacity of underlying layers. After the construction is completed, FWD (Falling Weight Deflectometer) tests and moving load tests were performed on top of the asphalt pavement surface. RESULTS : It was found from the LFWD and FWD test results that as the buried depth decrease, the deflections in subbase and surface layer were increased by 30% and 5~10%, respectively, but the deflection in base layer remained the same. In the moving load test, the longitudinal maximum strain was increased by 30% for 120mm of buried depth case and 5% for 100mm of buried depth case. Regarding the effect of refilling material, it was observed that the deflections in subbase and surface layer were 10% lager in recycled aggregate compared to the sand material. CONCLUSIONS : Based on the testing results, it was found that the change in buried depth and refiliing material would not significantly affect the pavement performance. However, it is noted that the final conclusion should be made based on an intensive structural analysis for the pavement under realistic conditions (i.e., repeated loading and environmental loading) along with the field test results.

Keywords

References

  1. A Study of Traffic Management Strategies for the Road Work Zone in Seoul, 2000, Seoul Development Institute. (도로공사장 교통관리 실천방안 연구, 2000, 서울시정개발연구원)
  2. Document for Consultation of Regulatory Reform, 2010, Korea Electric Power Corporation. (규제개혁 대상과제 협의자료, 2010, KEPCO 배전건설처)
  3. KEPCO Design Manual for Underground Power Distribution, 1999, Korea Electric Power Corporation. (한전 지중배전 설계편람, 1999, 한국전력공사 전력연구원)
  4. Social Overhead Efficiency Evaluation of Sewer Rehabiliation Including the Traffic Delay Costs, 2001, Korea Society of Environmental Engineers. (교통지체비용을 고려한 하수관거 정비사업의 경제성 평가에 관한 연구, 2001, 대한환경공학회)
  5. Optimal Sewer Rehabilitation Planning Considering Transportation Disruption Cost, 20003, Korean Society of Civil Engineers. (교통지체비용을 고려한 하수관거정비 계획수립의 최적화, 2003, 대한토목학회)
  6. A Study on the Diagnosis and Improvement: Application in Susung- Gu, Daegu, 2009, Yeungnam University. (도로점용공사의 문제점과 개선방안에 관한 연구-대구광역시 수성구 사례, 2009, 영남대학교)
  7. Investigation of Shallow Depth for Underground Facilities of Road Occupation, 1998, Road Preservation Technology Center. (도로점용 매설물건의 천층화 기술검토 보고서, 1998, 도로보전기술센터)
  8. The Standard Specification of Road Construction, 2009, Ministry of Land, Transport and Maritime Affairs (도로공사 표준시방서, 2009, 국토해양부)