Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

A very long cast in place pre-stressed concrete box girder bridge with tall columns in southern California is under construction. Two of the falsework bents were set on top of an uncompleted 9.5m tall MSE wall back fill. The concern was about the unexpected surcharge load behind the MSE wall during the soffit and stem bridge concrete pour, and the influence of the uniform concentrated surcharge on the wall stability and the bridge as well. The falsework bent load had created unexpected vertical load behind the MSE wall that could decrease the wall stability by generating extra lateral pressure and also increase the wall stability by generating extra vertical pressure on the wall straps. Boussinesq strip load and KZP2 methods are used for the falsework bent lateral pressure distributions behind the MSE wall. In this paper besides considering the MSE wall and the bridge falsework bents situation, dimensions and loading, final MSW wall stability safety factor will be presented.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Aug 11th, 12:00 AM Aug 16th, 12:00 AM

Stability of a MSE Wall under Bridge Falsework Bent Surcharge

Arlington, Virginia

A very long cast in place pre-stressed concrete box girder bridge with tall columns in southern California is under construction. Two of the falsework bents were set on top of an uncompleted 9.5m tall MSE wall back fill. The concern was about the unexpected surcharge load behind the MSE wall during the soffit and stem bridge concrete pour, and the influence of the uniform concentrated surcharge on the wall stability and the bridge as well. The falsework bent load had created unexpected vertical load behind the MSE wall that could decrease the wall stability by generating extra lateral pressure and also increase the wall stability by generating extra vertical pressure on the wall straps. Boussinesq strip load and KZP2 methods are used for the falsework bent lateral pressure distributions behind the MSE wall. In this paper besides considering the MSE wall and the bridge falsework bents situation, dimensions and loading, final MSW wall stability safety factor will be presented.