›› 2009, Vol. 30 ›› Issue (4): 1013-1017.

• Geotechnical Engineering • Previous Articles     Next Articles

Pit support technology development and engineering practice in Beijing

LIU Jian-guo，CHENG Liang-kui   

  1. Central Research Institute of Building and Construction, MCC Group, Beijing 100088, China
  • Received:2007-07-17 Online:2009-04-10 Published:2011-01-30

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Abstract:

The soils in Beijing usually have characteristics of unsaturated soil; pit instability is more related with impact of water. The excavation supports have more different portfolio forms. The new technology developments are in anchoring technology. Calculation of soil nailing is generally for internal stability control. The node structure in the connecting of face and soil nailing is extremely important; the soil nailing combining with prestressed anchors is a reliable and effective form of support. For multi-anchorage system, by the accumulation of measured data, establishing soil pressure correction model of local conditions is meaningful. By load-dispersive anchor, the anchorage efficiency can be increased substantially. The identical load and synchronous tension method should be adopted to tension test of load-dispersive anchor. The removable anchor is a powerful tool to avoid legal disputes.

Key words: excavation support, soil nailing, composite soil nailing, anchor, load-dispersive anchor

CLC Number: 

  • TU 443
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