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A platform for research: civil engineering, architecture and urbanism
A Simplified Expression for Ground Movements Induced by Excavations in Soft Clay
Abstract Clays are generally known not to be isotropic materials. The inherent anisotropy of clays results from the deposition process, which tends to induce a horizontal bedding plane in the soil layer. Soil movements induced by excavation activities are a crucial issue in urban geotechnical engineering with soft clays. However, empirical and semi-empirical methods for evaluation of lateral soil movements induced by excavations with consideration of inherent anisotropy have not been well-established. This study aims to establish a simplified evaluation for predicting ground movements reasonably based on a soil model which considered small-strain properties and anisotropic behavior. Parametric study by numerical analyses with an anisotropic soil model was used in this study. The anisotropic ratio for soil moduli was one of the factors in the simplified expression and ranged from 1.0 to 1.4 which agreed well with test data on many soft clays. A set of simplified expressions for predicting ground movements is proposed. Only the excavation geometry, the subsoil properties, stiffness of braces, and inherent anisotropy are required to evaluate the ground movements.
A Simplified Expression for Ground Movements Induced by Excavations in Soft Clay
Abstract Clays are generally known not to be isotropic materials. The inherent anisotropy of clays results from the deposition process, which tends to induce a horizontal bedding plane in the soil layer. Soil movements induced by excavation activities are a crucial issue in urban geotechnical engineering with soft clays. However, empirical and semi-empirical methods for evaluation of lateral soil movements induced by excavations with consideration of inherent anisotropy have not been well-established. This study aims to establish a simplified evaluation for predicting ground movements reasonably based on a soil model which considered small-strain properties and anisotropic behavior. Parametric study by numerical analyses with an anisotropic soil model was used in this study. The anisotropic ratio for soil moduli was one of the factors in the simplified expression and ranged from 1.0 to 1.4 which agreed well with test data on many soft clays. A set of simplified expressions for predicting ground movements is proposed. Only the excavation geometry, the subsoil properties, stiffness of braces, and inherent anisotropy are required to evaluate the ground movements.
A Simplified Expression for Ground Movements Induced by Excavations in Soft Clay
Teng, Fuchen (author)
2018-01-01
23 pages
Article/Chapter (Book)
Electronic Resource
English
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