›› 2010, Vol. 31 ›› Issue (11): 3499-3504.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Centrifugal test and analysis of bearing capacity of foundation under highway subgrade

LIU Yi-lin 1, 2, 3，HUANG Mao-song 1,4，DU Zuo-long 1, 4，MA Shao-kun5   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Research Institute of Highway, Ministry of Transport, Beijing 100088, China; 3. Key Laboratory of Road Construction & Material, Ministry of Transport, Beijing 100088, China; 4. Key Laboratory of Geotechnical and Underground Engineering Ministry of Education, Tongji University, Shanghai 200092, China; 5. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
  • Received:2010-04-06 Online:2010-11-10 Published:2010-11-24

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Abstract:

Because of the flexible interface and trapezoidal load, the failure modes and determination method of foundation under highway subgrade are different to the rigid foundation; so the study about bearing capacity of foundation under highway subgrade has valuable significance in theoretical research and practical engineering. Through centrifugal test of bearing capacity under different conditions such as flexible strip foundation, trapezoidal subgrade and flexible strip foundation of valley, bearing capacity of foundation under highway subgrade are studied; numerical simulation based on Mohr-Coulomb inside-tangent circle yield criterion are applied. Results show that it is difficult for subsoil under highway subgrade to come into being integer shear failure because of flexible foundation and rather high centrifugal acceleration; compared with rigid and flexible strip foundation, the central point under trapezoidal loading has greater displacement; the displacement of central point under flexible strip foundation are influenced by the valley terrain; ultimate bearing capacity is not obviously changed.

Key words: highway subgrade, ultimate bearing capacity, centrifugal test, flexible foundation, finite element analysis

CLC Number: 

  • U 416
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