Abstract
The settlement calculation model for soft clay foundation is established based on Hooke’s law and the Duncan-Chang model. By introducing the concept of damage ratio, the method for determining the deformation modulus of soil before and after damage under load is presented, and a nonlinear settlement calculation method which considers the structural characteristics of soft clay is proposed. In the end, a practical engineering example is analyzed with the proposed method and some current methods for soft clay settlement calculation. The results indicated that the proposed method is feasible and applicable in practical engineering.
Highlights
The structure of soil is defined as the manner of arrangement and state of aggregation of soil grains
Shen [4, 5] introduced the damage theory into the description of the mechanical behavior of structural soils and established the evolution law of soil damage; Zhang [6] established the statistical relationship between laboratory test data and in situ test data based on the practice in the Shanghai-Nanjing Expressway and proposed the settlement calculation method considering the effect of structural characteristics
Shi et al [7] used the finite element method to analyze the settlement and deformation of the embankment on the soft foundation considering the rheology and damage of the structural soil based on the double yield faced elastoplastic model proposed by Yin
Summary
The structure of soil is defined as the manner of arrangement and state of aggregation of soil grains. Lu [13] applied the structural damage theory to the settlement calculation of soft clay and proposed a revised settlement calculation formula based on the Duncan-Zhang model, considering the influence of Poisson’s ratio on the settlement of the foundation with the change of its stress. This paper starts with the discussion of the deformation mechanism of the soil element and combines Hooke’s law and the Duncan-Zhang model to establish a new calculation method for the settlement of the foundation considering the soft clay structure
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