Geotechnical Engineering - Ground Improvement Methods

Prepared for The Office of Engineering
by The Geotechnical Group of the Bridge Division
July 1996

Demonstration Project 116

The primary objective of Demonstration Project 116 is to enhance the acceptance and implementation of ground improvement methods by the transportation community. Ground improvement technologies are geotechnical construction methods used to modify and improve poor and marginal soil and rock conditions to meet project requirements. The ground improvement methods addressed in this project include: Grouting, Vertical Wick Drains, Soil Mixing, Stone Columns, Lightweight Fill Materials, Vibrocompaction, Dynamic Compaction, Soil Nailing, Mechanically Stabilized Earth Walls Reinforced Soil Slopes and Micropiles.

Implementing one or more ground improvement methods on a project can: increase bearing capacity, control vertical and lateral deformations, decrease imposed loads, provide lateral stability, increase resistance to liquefaction, and form a seepage cutoff and fill voids.

This Demonstration Project is intended for design generalists (project planners, roadway designers, consultant reviewers), design specialists (geotechnical, structural), construction engineers, and specification and contracting specialists involved with projects having problematic site conditions. The project scope of services can be tailored to adapt to local agency needs and issues. Federal, State and local public transportation agencies may select any or all of the project's available services.

Photo of lightweight fill being used in construction

Photo of wick drain installation

Photo of deep soil mixing

Page 2 of Flyer

Complete Document (36 k, Excel file)

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