›› 2009, Vol. 30 ›› Issue (2): 345-351.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of nonlinear settlement of foundations based on in-situ tests

LI Ren-ping   

  1. College of Civil & Hydropower Engineering , China Three Gorges University, Yichang 443002, China
  • Received:2007-08-03 Online:2009-02-10 Published:2011-01-27

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Abstract:

A new technique for calculating nonlinear settlement of foundations is proposed by using the data of plate loading test (PLT) and standard penetration test (SPT). Firstly, hyperbolic curve fitted out from the data of PLT and the correctional tangent modulus equation of soils is established. Secondly, the correctional tangent modulus equations of different stratified soils at different depths are determined using input soil parameters from SPT in accordance with the linear correlation. Finally, the total nonlinear settlement of a large foundation is calculated by using layerwise summation method with correctional tangent modulus and additional stresses. The results of settlement analysis of a foundation of an oil tank and a raft foundation of a tall structure in Guangdong Province show that this technique is able to calculate the entire nonlinear settlement from initiation to ultimate limit state with its simple principle, reliable parameters and accurate results, so as to achieve the objective of subsidence control for foundation engineering design with this method.

Key words: plate loading test, standard penetration test, correctional tangent modulus, foundation of oil tank, foundation of raft, settlement calculation

CLC Number: 

  • TU 470
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