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Column-supported embankments (CSEs) are a method of ground improvement commonly used when an embankment is required over soft, compressive soil that is likely to experience large settlements due to the added load in the absence of soil improvement. The Load-Displacement Compatibility (LDC) method evaluates the expected settlement and mobilization of geosynthetic for vertical load transfer for column-supported embankments. The GeogridBridge3 (GBB3) spreadsheet was developed as a tool to implement the LDC method for CSEs.
The Theory Manual for the Load Displacement Compatibility Method (LDC) for Design of Column-Supported Embankments (GSP 356) provides an updated, detailed overview on the theory, history, implementations, and mathematical foundations of the Load Displacement Compatibility method for the design of column-supported embankments.
The User’s Manual for GeogridBridge 3.0 guides engineers on how to use the GeogridBridge 3.0 (GGB3) spreadsheet, which utilizes the Load Displacement Compatibility (LDC) method for the design of column-supported embankments (CSEs) and walks through two worked examples to illustrate the use of the spreadsheet.
The Theory Manual, User Guide, and GGB3 spreadsheet reflect the latest version of the LDC method, which allows for greater flexibility compared to earlier versions with respect to defining embankment and subsurface stratigraphy, column arrangement, characterization and mobilization of vertical load transfer mechanisms, soil stress history and compressibility, as well as consideration of parameter uncertainty. The manual provides comprehensive technical information regarding the LDC method, which should be understood prior to utilizing the GGB3 spreadsheet, and the User Guide provides information on the actual use of the GGB3 spreadsheet along with two worked examples.
Both are written by Michael P. McGuire, Eric M. Hunstein, Elise G. Hummel, and Joel A. Sloan. Users can access the free GeogridBridge 3.0 spreadsheet for settlement and vertical load transfer analysis of column-supported embankments at https://doi.org/10.17605/OSF.IO/HQRBU