Chapter
Jun 6, 2018
Empirical Method to Estimate Lateral Wall Deformation Profiles and Bending Moment in Excavation Retaining Walls
Authors: L. Sebastian Bryson, Ph.D., M.ASCE [email protected], David G. Zapata-Medina, Ph.D. [email protected], and Jorge Romana-Giraldo [email protected]Author Affiliations
Publication: IFCEE 2018
Abstract
Excessive ground movements are a major concern in urban excavations because they can lead to significant displacements and rotations in adjacent structures. One of the key elements to add stiffness to an excavation support system is the retaining wall. However, it is conventionally designed based on limit equilibrium. The internal wall shear forces and bending moments are estimated employing apparent earth pressure diagrams and the internal hinge or tributary area methods. Although these approaches will prevent structural failure of the support wall, they may result in excessive wall deformations and ground movements. This paper presents an empirical method to estimate lateral wall deformation profiles and internal bending moment along a retaining wall in clays. The method is based on inclinometer data collected from 30 case histories worldwide and allows the designer, having the maximum lateral wall displacement and the height of the retaining wall, to predict the shape of lateral wall deformations for deep excavations based on soil type (i.e., based on the undrained shear strength parameter). The internal bending moment along the wall is derived from the fundamental relations of mechanics of materials and the classical theory of beams that relate the bending moment to the components of translation of the member. It assumes that the wall material is linear elastic.
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Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Jun 6, 2018
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ASCE Technical Topics:
- Bending (structural)
- Construction engineering
- Construction methods
- Continuum mechanics
- Deformation (mechanics)
- Displacement (mechanics)
- Dynamics (solid mechanics)
- Engineering mechanics
- Excavation
- Geotechnical engineering
- Geotechnical investigation
- Ground motion
- Moment (mechanics)
- Retaining structures
- Shear walls
- Soil deformation
- Solid mechanics
- Statics (mechanics)
- Structural dynamics
- Structural engineering
- Structural mechanics
- Structural members
- Structural systems
- Walls
Authors
Affiliations
Hardin-Drnevich-Huang Associate Professor, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506. E-mail: [email protected]
Associate Professor, Dept. de Ingeniería Civil, Universidad Nacional de Colombia, Sede Medellín, Medellín, 050034, Colombia. E-mail: [email protected]
Graduate Research Assistant, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506. E-mail: [email protected]
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