›› 2007, Vol. 28 ›› Issue (5): 921-926.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Loading and deformation characteristics of highway widened subgrade with retaining wall in mountainous region

WAN Zhi1,2, DENG Zhong-wei 1, LIU Bao-chen1, WU Ya-zhong3   

  1. 1. School of Civil & Architectural Engineering, Central South University, Changsha 410075, China; 2. Hunan Communications Research Institute, Changsha 410015, China; 3. Hunan Communications Department, Changsha 410011, China
  • Received:2005-06-02 Online:2007-05-10 Published:2013-09-10

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Abstract: By the FEM numerical method, the characteristics of loading and deformation in widened highway subgrades with retaining wall in mountainous areas are discussed. The results by FEM show that in the subgrade-widening project in mountainous area, settlement curve of the subgrade features the shape of scoop; in contrast with the one in the shape of parabola in new-built highway; not only the treatment of jointed section between new and old highway subgrades, which is the key task in normal widened highway subgrade, but also the treatment of jointed section between new highway subgrade and retaining wall should be stressed in the subgrade-widening project in mountainous area; the lateral earth pressure distribution of retaining wall exhibits nearly a parabolic curve, different from the triangle form by classical earth pressure distribution theory. The analyses on the effects of the widened extent, the slope of old embankments and the different characteristics between the old and new materials of subgrades, reveal the rule of uncoordinated deformation between the new and old subgrades, and the characteristics of the lateral earth pressure distribution of retaining wall.

Key words: highway in mountainous area, road-widening, subgrade, retaining wall, uncoordinated deformation, the characteristics of loading and deformation

CLC Number: 

  • TU 433
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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