Analysis of Methods for Checking Bearing Capacity of Underlying Weak Layer in Pile Foundation Design

Lei Fenghao; Tian Jingxian; Wang Chenghua

doi:10.3969/j.issn.1007-2993.2013.01.001

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Lei Fenghao, Tian Jingxian, Wang Chenghua. Analysis of Methods for Checking Bearing Capacity of Underlying Weak Layer in Pile Foundation Design[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2013, 27(1): 1-4. doi: 10.3969/j.issn.1007-2993.2013.01.001

Citation:

Lei Fenghao, Tian Jingxian, Wang Chenghua. Analysis of Methods for Checking Bearing Capacity of Underlying Weak Layer in Pile Foundation Design[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2013, 27(1): 1-4. doi: 10.3969/j.issn.1007-2993.2013.01.001

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Analysis of Methods for Checking Bearing Capacity of Underlying Weak Layer in Pile Foundation Design

doi: 10.3969/j.issn.1007-2993.2013.01.001

1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. Department of Campus Planning. Hebei University of Technology, Tianjin 300401, China

Received Date: 2012-10-12

Abstract

Abstract

Checking for the bearing capacity of underlying weak layer is an important item in pile foundation desigru The different methods which are suggested in Technical Code for Building Pile Foundations JGJ 94-1994 and JGJ 94-2008 are comparatively analyzed. The self weight of soil above cap and the shaft resistance around the pile group are analyzed. Deficiencies of the methods are found in the two codes, some suggestions are put forward:the former is fit for small-scale pile foundation without basement while the latter is fit for piled box(raft) foundation with basement, the shaft resistance around the pile group should use the characteristic value when calculate the additional stress.
- pile foundation,
- underlying weak layer,
- bearing capacity,
- self-weight stress,
- shaft resistance