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Research Article

Calculation of Reasonable Equivalent Uniform Pressure Height and Lateral Earth Pressure Characteristics of Retaining Structures

옹벽에 작용하는 수평토압 특성 분석 및 합리적인 등가상재하중 높이 산정

Kicheol Lee1
,
Moon-Kyung Chung2
,
Seunghwan Seo3
,
Dongwook Kim4*
이 기철1
,
정 문경2
,
서 승환3
,
김 동욱4*
1Member, Graduate Student, Dept of Civil and Envirionmental Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
2Member, Senior Research Fellow, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-daero, Ilsanseo-gu, Gyeonggi-do 10223, Republe of Korea
3Member, Research Specialist, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-daero, Ilsanseo-gu, Gyeonggi-do 10223, Republe of Korea
4Member, Associate Professor, Dept of Civil and Envirionmental Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
* Corresponding Author
30 December 2019. pp. 139-149
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Abstract

옹벽 설계에서는 차량하중에 의해 유발되는 수평토압을 등가상재하중 높이를 토대로 계산한다. 미국 AASHTO의 LRFD 설계 기준은 미국 표준트럭을 대상으로 선정되었기 때문에 국내의 표준트럭과 부합하는 새로운 등가상재하중 높이를 산정 할 필요가 있다. 본 연구에서는 미국 표준트럭과 다른 국내 표준트럭의 특성을 반영하고 차량주행방향, 포장층의 포아송비, 옹벽높이를 고려하여 Boussinesq 이론에 근거한 국내 등가상재하중 높이를 제안하였다. 국내 표준트럭의 축하중과 하중 밀도가 미국 표준트럭보다 높기 때문에, 본 연구에서는 제안한 등가상재하중 높이는 미국 설계 기준에 제안된 등가상재하중 높이 보다 큰 것을 확인하였다. 가장 높은 등가상재하중 높이는 차량주행방향이 옹벽길이방향과 직교할 때로 확인되었다.

For retaining wall designs, horizontal earth pressure induced by traffic loads over the walls is calculated based on equivalent uniform pressure height. The AASHTO LRFD design standards propose equivalent uniform pressure height of traffic loads; however, the equivalent uniform pressure height is calibrated using the US standard trucks. As the domestic standard trucks are different from the US standard trucks, in this study, new domestic equivalent uniform pressure height is proposed using the Boussinesq theory varying vehicle directions, Poisson's ratios of pavement layers, and retaining wall height. The proposed equivalent uniform pressure heights are generally higher than those proposed by the AASHTO design standards because the axle loads and their densities of two domestic standard trucks are higher than those of the US standard trucks. The most highest equivalent uniform pressure height was found for traffic direction perpendicular to longitudinal direction of retaining wall.

Keywords
Limit state design
Retaining wall
Equivalent uniform pressure height
Boussinesq theory
Domestic standard truck

References
1
AASHTO (1994), AASHTO LRFD bridge design specifications : SI units, American Association of State Highway and Transportation Officials, Washington, DC.
2
AASHTO (2002), Standard Specifications for Highway Bridges, 17th Edition of American Association of State Highway and Transportation Officials, Washington, DC.
3
AASHTO (2012), AASHTO LRFD bridge design specifications. American Association of State Highway and Transportation Officials, Washington, DC.
4
AASHTO (2018), LRFD Bridge Design Specifications, 8th Edition American Association of State Highway and Transportation Officials, Washington DC.
5
Boussinesq, M. J. (1885), “Application des potentiels a l'etude de l'equilibre et du mouvement des solides elastiques, principalement au calcul des deformations et des pressions que produisent, dans ces solides, des efforts quelconques exerces sur une petite partie de leur surface ou de leur interieur: Memoire suivi de notes etendues sur divers points de physique mathematique et d'analyse”, GauthierVillars, Paris, pp.722.
6
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9
Kim, D., Jin, H., Seo, S., Park, J., Kim, D. and Chung, M. (2018), “Assessment of Equivalent Heights of Soil for the Lateral Earth Pressure Against Retaining Walls Due to Design Truck Load”, Journal of the Korean Geosynthetics Society, Vol.17, No.4, pp.119-128. (in Korean)
10
Lee, K., Kim, D. and Chung, M. K. (2017), “Analysis of Lateral Earth Pressures on Retaining Wall from Traffic Load Distribution”, Journal of the Korean Geosynthetics Society, Vol.16, No.4, pp.43-55. (in Korean)
11
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Withiam, J. L. (2003), “Implementation of the AASHTO LRFD Bridge Design Specifications for Substructure Design,” LSD2003: International Workshop on Limit State Design in Geotechnical Engineering Practice, World Scientific Publishing Company.
10.1142/9789812704252_0019
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 18
  • No :4
  • Pages :139-149
  • Received Date : 2019-11-21
  • Revised Date : 2019-11-28
  • Accepted Date : 2019-12-02
  • DOI :https://doi.org/10.12814/jkgss.2019.18.4.139
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