Analysis and modification of the Hewlett and Randolph method

作者：Zhuang Yan^*; Cui Xiaoyan

来源：Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 2015, 168(2): 144-157.

DOI：10.1680/geng.14.00014

• embankments
• geotechnical engineering
• piles & piling

The Hewlett and Randolph method has been widely used in the design of piled embankments. This approach assumed that the arch was semicircular (in two dimensions) and hemispherical (in three dimensions), and was of uniform thickness. In this paper, a series of finite-element analyses are presented. The analyses show that the Hewlett and Randolph method is much better than the adapted Terzaghi's method in describing the vertical stress profile in the embankment. It also shows that the thickness of the arch is non-uniform and the stress acting on the subsoil is overestimated. Thus, three methods are presented to modify the Hewlett and Randolph method, showing that the method proposed modifies both the thickness of radius of the arch and the earth pressure coefficient of the embankment material, resulting in closer agreement with the finite-element analyses. The modified method also provides good agreement with the physical modelling results and field measurements.

• 出版日期2015-4
• 单位河海大学