NATIONAL NEED AND CRITICAL ISSUE (NRC, 1989)

RECOMMENDED ACTIONS (NRC, 1989)

MAJOR ACCOMPLISHMENTS THROUGH 2004

Infrastructure Development and Rehabilitation

 

 

Meeting the backlogged rehabilitation needs of existing facilities and development of new infrastructure systems requires a coordinated interdisciplinary approach, with geotechnology playing a prominent role.

Develop new materials.

Geosynthetic materials have been developed for many applications.

Develop remote sensing techniques to both locate and characterize existing facilities.

Significant advances in GPR, LIDAR, InSAR, and airborne methods.

Develop nondisruptive designs for repair and replacement of infrastructure.

Trenchless technologies, minimally invasive ground improvement, directional drilling, advanced ground reinforcement technologies now available.

Develop geotechnical instrumentation for site characterization and performance assessment.

Some advances in instrumentation, but continuing research and development is needed. Better means of communicating the value of instrumentation to project owners are also needed.

Develop new and better soil and rock modification techniques.

Remains one of the most studied areas, especially grouting methods, deep densification, reinforcement. Renewed interest in admixture stabilization.

Provide a technical basis for life-cycle analysis and design.

Advances have been made on materials flows and a better understanding of inventory analysis for construction materials. Technologies are well established for life-cycle analysis for metals and other building materials, many completed by groups interested in understanding their own materials as well as for comparative reasons.



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