|Table of Contents|

Deformation Analysis of Bolt and Calculation of Critical Anchorage Length(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2008年03期
Page:
17-21
Research Field:
Publishing date:
2008-09-20

Info

Title:
Deformation Analysis of Bolt and Calculation of Critical Anchorage Length
Author(s):
ZHAO Ming-hua1;  LIU Jun-long2;  LONG Zhao2
1. Institute of Geotechnical Engineering, Hunan University, Changsha 410082, Hunan, China; 2. China Northwest Municipal Engineering Design and Research Institute Ltd, Lanzhou 730000, Gansu, China
Keywords:
bolt;  load transfer;  Winkler foundation model;  displacement;  deformation;  critical anchorage length
PACS:
TU472
DOI:
-
Abstract:
Firstly, the mode of shear displacement of pile-soil load transfer regular was introduced, and the basic equation of bolt load transfer was built by combining axial Winkler foundation model. The analytical solution of the relation between load and deformation of bolt and uplift pile was deduced by using the balance of unit body, deformation coordination between anchor and soil and boundary condition, so as to deduce the calculation formulae of bolt critical anchorage length. Then, the major factors influencing the bolt critical anchorage length were analyzed, and some qualitative conclusions were got. Finally, analysis was carried by taking a bolt in deep foundation pit engineering for high-rise building as an example. The results indicate that the theoretical calculation results match well with the actual measurement results of bolt load-deformation curves; the calculation of critical anchorage length is reasonable, and can be used as a reference for design of bolt.

References:

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Last Update: 2008-09-20