Learning to love NDT

Article Abstract:

Technological advances have made nondestructive testing (NDT) for concrete more reliable but civil engineers hesitate to use the method due to past problems. The development of digital electronics and computers can now eliminate these problems and facilitate data acquisition. Automated processing also eases the tedious task of arranging information into tables and graphs. Color graphics and digital signal processing improves data interpretation for more reliable analysis. These new technologies enhance NDT's functions in quality control and performance evaluation of concrete.

Evaluation, Concretes, Concrete

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Chicago's micropile debut

Article Abstract:

The strengthening of the foundation of Chicago's Orchestra Hall was achieved by using high-capacity micropiles. These helped to eliminate earlier settlement in the north wall of the Hall and to support additional load. The high load capacity drilled steel micropiles and hydraulically pushed micropiles yielded minimal settlement without any disturbances in the adjacent soil mass. The specially shaped ceiling, reshaped side walls, and stage's extended rear wall improved the hall's acoustics.

Usage, Buildings and facilities, Remodeling and renovation, Chicago, Illinois, Piling (Civil engineering), Pilings (Building), Music-halls, Music facilities

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What lies beneath?

Article Abstract:

The use of non-destructive testing (NDT) methods, such as the impulse response test and the parallel seismic test, for evaluating existing building foundations is discussed. NDT methods will become more important as more parts of the national infrastructure need replacement, renovation, or upgrading in the future.

United States, Product information, Excavation work, Excavating & Foundation Work, Excavation Contractors, Methods, Foundations (Building), Building foundations

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