Advanced Foundation Engineering วิศวกรรมฐานรากชั้นสูง
UMASS Lowell – Course No. 14.533 Final Project
Mechanically Stabilized Earth Walls For Support of Highway Bridges
Use of Mechanically Stabilized Earth (MSE) walls to support bridges is a more economical solution than cast-in-place structures. The use of MSE walls for
direct support (Abutment resting on a spread footing atop the MSE structure) and indirect support (Abutment on piles with the MSE structure supporting the fill) of bridge structures is well documented. The Reinforced Earth Company pioneered the design of MSE bridge abutment structures in the 1970's for both single span bridges with relatively light loads to heavy loaded industrial and rail structures with loads on the order of 1000 kN/m. Research utilizing finite element analysis, scale models and instrumented full scale structures has shown that the loads imparted from the spread footing can be included in the design of the wall by superposition and basic principles of soil mechanics. Pile Supported Abutments are designed as a simple MSE retaining wall, with the vertical loads from the bridge being imparted to the piles. Horizontal bridge loads may be resisted by additional earth reinforcement added to the pile cap. Integral bridge abutments may impart additional horizontal loads that must be compensated for in the internal stability design of the MSE structure. Nearly thirty years of experience in the implementation of MSE walls and abutments successfully demonstrates the applicability and performance of this technology.
Advanced Foundation Engineering Mechanically Stabilized Earth Walls For Support of Highway Bridges
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