Rock and Soil Mechanics ›› 2019, Vol. 40 ›› Issue (S1): 253-258.doi: 10.16285/j.rsm.2018.1363

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Incremental analytical method for prestressed anchor and soil nail wall composite support system

GUO Yuan-cheng1, LI Ming-yu1, ZHANG Yan-wei2   

  1. 1. College of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China)
  • Received:2018-07-25 Online:2019-08-01 Published:2019-08-16
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (50978235, 51508520) and the Key Scientific and Technological Research Project of Henan Education Department (14A560017).

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Abstract: An incremental method is proposed for analyzing the load transfer mechanism and deformation of pre-stressed anchor and soil nailing composite supporting system in the layered excavation process by considering the application of pre-stress as a loading step as well as assuming that the potential slip surface is a plane. Analysis of the influence of anchor pre-stress and setting position shows that with the increase of anchor pre-stress, the inclination of potential slip surface decreases gradually, and the contribution to the overall stability of foundation pit increases first and then decreases. Further, the contribution of the pre-stress becomes more significant as the position of the anchor becomes lower. The validity of proposed method is verified through comparisons among predictions using proposed method, numerical simulations and field investigations.

Key words: foundation pit support engineering, prestressed anchor and soil nail wall composite support system, incremental analytical method, numerical simulation

CLC Number: 

  • TU473
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