Active Earth Thrust Considering Tension Crack, Pore-water Pressure and Soil Nonlinearity

The presences of tension cracks and pore-water pressure will reduce the stability of a soil-wall system. This study develops a kinematical approach to analyze how the active earth thrust is influenced by tension cracks and pore-water pressure, using the powerlaw nonlinear yield criterion. Although m...

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Bibliographic Details
Published inKSCE journal of civil engineering Vol. 23; no. 1; pp. 56 - 62
Main Authors Li, Zheng-Wei, Yang, Xiao-Li
Format Journal Article
LanguageEnglish
Published Seoul Korean Society of Civil Engineers 2019
Springer Nature B.V
대한토목학회
Subjects
Backfill
Civil Engineering
Cracks
Earth
Engineering
Geotechnical Engineering
Geotechnical Engineering & Applied Earth Sciences
Hydrostatic pressure
Industrial Pollution Prevention
Nonlinear systems
Nonlinearity
Objective function
Pore water pressure
Pressure
Seepage
Soil
Soil stability
Soil strength
Soil water
Tension
Thrust
Water
Water pressure
Yield criteria
Yields
토목공학
tension crack
active earth thrust
nonlinear yield criterion
pore-water pressure
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Summary:The presences of tension cracks and pore-water pressure will reduce the stability of a soil-wall system. This study develops a kinematical approach to analyze how the active earth thrust is influenced by tension cracks and pore-water pressure, using the powerlaw nonlinear yield criterion. Although many cracks may be present in the backfill, this paper only involves one crack which leads to the most unfavorable effect. The influence of pore-water pressure is also considered using the concept of pore-water pressure coefficient. The power-law yield criterion is adopted characterize the soil strength, and the generalized tangential technique is introduced to realize the transition to the conventional linear problem. An objective function for the active earth thrust is derived from the equilibrium of rates of work and energy. Numerical results are determined from a maximization programming. By comparing with the available solution, the presented solution is validated. The results show that the presence of cracks has an unfavorable influence of increasing the active earth thrust, and this effect is even more obvious when the impact of seepage pressure is considered.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-018-1098-z