Abstract:
Piles used as deep foundations for high-rise buildings are often subject to passive loading due to lateral soil movements. These movements could occur due to tunnelling, deep excavation, landslide, earthquake, or other effect. The design of the piled foundations will depend on selecting input parameters. How to gain these parameters from model or in-situ tests (with different sliding depth) to design remains an issue, as any tests conducted on a specified sliding depth can be hard to related to real world scenario.
The author and his team publish widely on modelling the response of single piles and pile groups subjected to axial loading and various lateral soil movement profiles. It includes the results from model scale (1 m ´ 1 m ´ 1 m) tests from various (rectangular, triangular, parabolic) soil movement profiles and also theoretical (2-layer and 3-layer) modelling.
This paper will present some typical tests’ results and analysis on the response of passive piles in clay (e.g. due to lateral soil movement, land slip etc). One set of tests will be focused on increasing sliding depths on model piles; and the other set will be focused on a fixed depth of slip on in-situ piles. Analysis using the 2-/3-layer models will highlight drawback in existing study and impact of sliding depths on selecting design parameters. The paper should be interesting to relevant practical design.