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Volume 34 Issue 7
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JIA Ning. Coefficient of at-rest earth pressure from limited backfill[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1333-1337.
Citation: JIA Ning. Coefficient of at-rest earth pressure from limited backfill[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1333-1337.
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Coefficient of at-rest earth pressure from limited backfill

  • (North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Beijing 100120, China)

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  • Received Date: July 18, 2011
  • Published Date: July 24, 2012
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    • Abstract
  • Based on the concept of mobilized angle of internal friction, the coefficient of at-rest earth pressure from limited coarse backfill Κ0  is obtained after the analysis of the Mohr's cycle. A comparison is made with Jaky's formula for half infinite soil mass Κ0J and active earth pressure from limited backfill Κa. It is found that Κ0 is close to or smaller than Κ0J, when the internal friction angle between the rock face and backfill δr is equal to that of backfill Ф.  Κ0 is not only influenced by Ф and inclination of the rock face, but also by δr ; Κ0 may be larger or smaller than Κ0J, when δr is smaller than Ф ; Κ0 and Κa decrease with the increase of the inclination of the rock slop; and Κ0 is larger than Κa. To make the rock face rough and to adopt bench excavation are both effective methods to reduce the at-rest earth pressure from the limited backfill. A design graph is given at the end of the paper.
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    • References (14)
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