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2016 Vol.15, Issue 3 Preview Page
Comparison of Construction Cost and External Stability of Railway Abutment wall with Friction Angle of Backfill Materials

뒷채움재의 내부마찰각 변화에 따른 철도교대의 안정성 및 공사비 비교

Chunghyun Yoo1
,
Chanyong Choi2*
,
Sangbeom Yang3
,
Yonggul Park4
유 충현1
,
정 인근2*
,
유 충현3
,
박 용걸4
1Nom-Member, Graduate student, Department of Railway Construction, Seoul National University of Science and Technology
2Member, Principal Researcher, High Speed Research Division, Korea Railroad Resarch Institute
3Non-Member, Graduate student, Dept of Civil, Architecture and Environmental Systems Engineering, Sungyunkwan Univ
4Non-Member, Professor, Department of Railway Construction, Seoul National University of Science and Technology
*교신저자. *Corresponding Author. 
30 September 2016. pp. 67-76
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Abstract

The railway bridge abutment subjected to the lateral earth pressure is a sensitive structure that is affected by backfill materials, installation methods, compaction, and drainage system and so on. The several design loads for the bridge abutment design consist of traffic loading on bridges and vertical & lateral force due to surcharge load at backfill. Especially, the lateral earth pressure of design load components is important and considered in the design of geotechnical engineering structure such as bridge abutment wall. The determination of cross section for abutment is finally determined with calculating external stability and member force of abutment wall structures. In this study, the abutment wall height is 12m and the optimal cross section of abutment wall has been determined that satisfies an external stability for abutment structure through friction angles of 35, 40, and 45 degrees of backfill materials. The external stability and member force of abutment wall with friction angle of backfill materials and were calculated and construction cost of each abutment wall structures was compared. It found that the construction cost was reduced from 2.2 to 8.4% with friction angle of backfill materials.

Keywords
Friction angle
Stability
Axial force of member
Construction cost
Railway bridge abutment

교대는 토압을 받는 구조체로 뒤채움의 재질 및 부설방법, 다짐정도, 배수시설 등에 따라 교대에 미치는 영향이 민감한 구조물이다. 하지만 보통 실무에서는 경험치인 내부마찰값을 30~35°를 적용하고 있는 실정으로 뒤채움재의 물성치값을 현실에 맞도록 합리적인 값의 설정이 필요하다고 할 수 있다. 본 논문에서는 교대높이 12m로 가정하고 직접기초의 교대를 최소안전율을 기반하여 절․성토 표준단면을 선정하여 내부마찰각의 변화에 따른 외적안정성분석와 부재력 검토하여 공사비를 비교하였다. 그 결과 내부마찰각에 따라 교대단면 축소 등으로 인한 공사비용 절감효과는 약 2.2%~8.4% 감소하였다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 15
  • No :3
  • Pages :67-76
  • Received Date : 2016-06-01
  • Revised Date : 2016-08-26
  • Accepted Date : 2016-09-21
  • DOI :https://doi.org/10.12814/jkgss.2016.15.3.067
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