DEVELOPMENT OF SIMPLE CALCULATION METHOD OF SUBGRADE ELASTIC MODULUS IN CONSIDERATION OF RELIABILITY

• 竹内 康

  東京農業大学 地域環境科学部

• 毛 世華

  東京農業大学大学院 農業工学専攻

• 岡澤 宏

  東京農業大学 地域環境科学部

• 木幡 行宏

  室蘭工業大学大学院 工学研究科くらし環境系領域

• 西澤 辰男

  石川工業高等専門学校 環境都市工学科

Bibliographic Information

Other Title

• 信頼性を考慮した路床弾性係数の簡易算出式の提案

Abstract

 In the mechanical design method of asphalt pavements, it is often examined that the elastic modulus of the subgrade material is determined by using a simple calculation equation "10*CBR" which was adopted for the Shell's design method. However, from the results of domestic and foreign findings, it was unidentified that the simple equation "10*CBR" has how much reliability, because the elastic modulus was distributed widely from "5*CBR" line to "20*CBR" line, even if it was the same CBR value. Therefore, in this study, by using the rearranged past data, the reliability of the subgrade elastic modulus was examined when the design CBR was applied to the simple equation. As a result, it was found that the reliability of the simple equation "10*CBR" decreases with increase of the degree of reliability. Hence, a new simple equation using the exponential function for calculating the subgrade elastic modulus, which can set coefficients depending on degree of reliability, was proposed in this study.

Journal

• Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)

  Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering) 67 (3), I_95-I_101, 2011

  Japan Society of Civil Engineers

Keywords

• reliability
• elastic modulus
• subgrade
• design CBR

Details

• CRID: 1390001205354657664
• NII Article ID: 130004962106
• DOI: 10.2208/jscejpe.67.i_95
• ISSN: 21856559
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed