Numerical Study on the Ground Behavior with Basal Heave during Vertical Shaft Excavation in Clays
Publication: Geo-Congress 2023
ABSTRACT
When excavating a vertical shaft in clay, basal heave may occur as depth increases. Basal heave can be hazardous to workers by destabilizing the excavation surface and causing ground deformation that deteriorates the stability of the surrounding ground. Therefore, before constructing a vertical shaft in clay, the behavior of the surrounding ground owing to basal heave should be investigated. Herein, the behavior of the ground surrounding a vertical shaft owing to basal heave was numerically simulated by assuming specific excavation conditions of a vertical shaft for different excavation depths in soft clay. The thickness of the shaft embedment was a variable used to improve the stability of the vertical shaft base; the effects of this parameter on the deformation of the basal heave and surrounding ground were analyzed. The result revealed that the installation of the shaft embedment reduced basal heave displacement, thereby suppressing the deformation of the surrounding ground.
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Geo-Congress 2023
Pages: 532 - 540
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Published online: Mar 23, 2023
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