›› 2009, Vol. 30 ›› Issue (12): 3793-3796.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on composite support pattern of soil nails and prestressed anchors in deep foundation pits

DONG Cheng1, ZHENG Ying-ren1, CHEN Xin-ying2, TANG Xiao-song1   

  1. 1.Logistical Engineering University, Chongqing 400041, China; 2.The Fourth Constructing Company (Group) of Limited Liability, Jinan 250031, China
  • Received:2008-05-28 Online:2009-12-10 Published:2010-01-18

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Abstract:

The composite support pattern of soil nails and prestressed anchors are commonly adopted in the projects of deep foundation pits. By using the FEM program of PLAXIS and choosing appropriate material models, the support pattern of soil nails and prestressed anchors and the pattern of soil nail walls are analyzed. Then the slope stability of foundation pits is studied; and it is shown that the location of prestressed anchor is vital in the composite support pattern. The closer the anchor is to the top of the slope, the more useful the anchor is and better the effect is. Compared with support pattern of soil nails, the displacement of soil nails and prestressed anchor tends to reduce. However, the number of anchors and the value of prestress have some effects on the final result; and the localized inclined ramp is beneficial to control the maximum horizontal displacement of the pithead.

Key words: soil nails, prestressed anchors, support of deep foundation pits, PLAXIS

CLC Number: 

  • TU 473
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