›› 2010, Vol. 31 ›› Issue (3): 760-764.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of cyclic loading for subgrade bed of high speed railway

WANG Zhi-meng 1,2，JIANG Guan-lu1，WEI Yong-xing2，HU An-hua2   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China
  • Received:2008-07-08 Online:2010-03-10 Published:2010-03-31

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Abstract:

It’s the basis for designing subgrade bed to master detailedly dynamic performance and settlement laws of subgrade. Combining with the construction of Dazhou-Chengdu railway, the studying team buried test elements in subgrade and studied the dynamic performance and settlement laws of subgrade by using a new facility called ZSS50 which could simulate the train dynamic loads. The results indicate that the dynamic indexes and settlements meet the designing requirements; and an evident influencing factor for them is the axle load of train; along the cross section of subgrade, the dynamic responses are unequal, and show the saddle-shaped distribution; the dynamic responses decrease with the depth of subgrade increasing, and decrease faster in surface layer than in bottom layer; the ZSS50 can model exactly dynamic loads of train, it can be handled easily; and it is an ideal facility for studying the dynamic performance of track and subgrade.

Key words: high speed railway, subgrade bed, cyclic loading, dynamic performance, settlement laws

CLC Number: 

  • TU 435
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