Abstract
AbstractThis paper uses limit analysis to develop a two-dimensional (2D) and a three-dimensional (3D) analysis of slurry trench local and overall stability for cohesive soil. Formulas for the slurry trench stability analysis are obtained through theoretical derivation based on limit analysis theory, and rotational mechanisms are then presented for slurry trench stability. For 2D slurry trench local and overall stability, the failure surface has the shape of a circular arc, whereas it has the shape of spherical cap for 3D local stability, and it has the shape of a torus with an outline defined by a circle for 3D overall stability. Examples are provided to illustrate the safety factor influenced by the slurry and soil bulk density ratio, slurry level depth and trench depth ratio, thickness of the weak soil layer, cohesion, and trench width and depth ratio. The safety factor for the 3D solutions is approximately 1.1 times greater than the safety factor for the 2D solutions for local stability but 1.2 times g...
Highlights
Slurry trenches are used in the construction of groundwater cutoff walls and subsurface structural diaphragm walls
This paper aimed to develop a two-dimensional (2D) and a three-dimensional (3D) analysis of slurry trench local and overall stability for cohesive soil
It is commonly accepted that 3D analyses yield safety factors for slopes that are greater than those from 2D analyses (Li et al 2010; Tutluoglu et al 2011)
Summary
Slurry trenches are used in the construction of groundwater cutoff walls and subsurface structural diaphragm walls. The slurry velocity during rotation about axis O is vsr 1⁄4 rx2v sin u pffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi psr 1⁄4 22gsrrx2 h99 R2 2 d2sec u where the functions rx1 , rx2 , and h99 are defined by Eqs.
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