Study on a Calculation Method of Critical Embankment Height on Natural Soft Foundation Considering the Effect of Crust Layer

Fu, Zhu; Zhan, Gao Feng

doi:10.4028/www.scientific.net/amm.204-208.202

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…1 12 ); and c 3 , f 3 , c t , and u t are the cohesion, internal friction angle, uniform cohesion, and uniform internal friction angle within the soft soils, respectively. The boundary equation for the critical edge can be obtained by substituting equations (18) and (19)…”

Section: Formulas For Critical Edge Load and Critical Loadmentioning

confidence: 99%

“…During the implementation of an engineering project, the appearance of a plastic deformation zone at a specified depth in the foundation soils is often used as a criterion for foundation damage. 15,18 For this study, z max = B/4 is used. The expression for critical load p 1/4 can be derived as…”

Section: Formulas For Critical Edge Load and Critical Loadmentioning

confidence: 99%

“…When subjected to the effects of a uniform strip load, the crusty layer (with a width of B) will be affected by the shear effects of the AD and CE sliding surfaces as it slides downward. It is known from the literature 10,18 that the crusty layer will transfer 2Q shear strength beyond width B through the sliding surfaces. Hence, the value dp of the average reduction in load size on the top surface of the soft soil layer within the range of width B can be expressed as…”

Section: Formulas For Critical Edge Load and Critical Loadmentioning

confidence: 99%

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A new calculation method for the bearing capacity of soft soil foundation

Zhang

Dong

et al. 2017

Advances in Mechanical Engineering

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The increase in bearing capacity under the influence of consolidation is the main feature of a soft foundation on the stage of subgrade filling. The effects of consolidation, intermediate principal stress, earth pressure at rest, and presence of a crusty layer were all considered. Based on the unified strength theory, new theoretical formulas for critical edge load and critical load were deduced. The solution of the Mohr-Coulomb strength theory is a special case of the unified strength theory. The proposed formulas were analyzed and validated on a practical railway subgrade filling project in an area with soft soils. The calculated results showed good agreement with experimental results. The new formulas provide not only a theoretical basis for the calculation of the bearing capacity of a soft soil foundation but also a reference for calculating the safe height of subgrade filling in a soft soil area. Using the new formulas to calculate the bearing capacity of the soft soil foundation and the filling height of embankment under different degrees of consolidation, it is possible to understand the variation pattern of the bearing capacity of the foundation during construction of the embankment filling, which provides significant guidance for the safe filling of the embankment on a soft soil foundation.

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Section: Formulas For Critical Edge Load and Critical Loadmentioning

confidence: 99%

Section: Formulas For Critical Edge Load and Critical Loadmentioning

confidence: 99%

Section: Formulas For Critical Edge Load and Critical Loadmentioning

confidence: 99%

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A new calculation method for the bearing capacity of soft soil foundation

Zhang

Dong

et al. 2017

Advances in Mechanical Engineering

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Effect of Weathered Surface Crust Layer on Stability of Muar Trial Embankment

2015

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his paper attempts to evaluate the effect of surface crust layer on the stability and deformation behavior of embankment. A full-scale case history trial embankment constructed on Muar flat in the valley of the Muar River in Malaysia was modeled and analyzed. The Muar trial embankment was simulated in two- and three-dimension (2-D and 3-D) utilizing finite element programs PLAXIS 2-D AND PLAXIS 3-D FOUNDATION, using staged-construction procedure. Sensitivity analysis was performed by varying the thickness of weathered crust layer beneath the embankment fill, i.e., three models of embankment with no surface crust, 1 m surface crust and 2 m surface crust layer. Predictions were made for the vertical and the horizontal displacements of the embankment. Factor of safety for each meter increase in the embankment height was defined until the failure is reached. It is concluded that the bearing capacity of the ground and the deformation behavior of the embankment were sensitive to the thickness of the weathered crust layer. The surface crust layer has a positive effect on the stability of the embankment and consequently reduces the settlement and increases the failure height of the embankment fill up to 37%.

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Study on a Calculation Method of Critical Embankment Height on Natural Soft Foundation Considering the Effect of Crust Layer

Cited by 2 publications

References 2 publications

A new calculation method for the bearing capacity of soft soil foundation

A new calculation method for the bearing capacity of soft soil foundation

Effect of Weathered Surface Crust Layer on Stability of Muar Trial Embankment

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