This paper summarizes micro-inch response of cosmetic cracks in a typical slab-ongrade ranch style house to both construction equipment-induced vibration and environmental (weather) effects. This structure was instrumented, and its response studied as part of the development of an Autonomous Crack Measurement (ACM) system. ACM systems are intended to record -- with a single sensor -- micro-inch crack displacements from both long-term environmental changes and transient construction vibrations for comparison in an understandable fashion. Ground motions were measured with velocity transducers, and micro-inch crack displacements were measured with LVDT displacement sensors. Construction within 14 m (45 ft) of the house involved trackhoe excavation for a 10x12 ft. reinforced concrete box culvert, chain trencher excavation for an 8-inch water service line, and vibratory compaction of trench backfill and granular sub-grade. As with many other studies of this nature, it was found that the weather induced crack response far exceeded that produced by construction vibrations even when produced by vibratory rolling within 3 m (10 ft ) of the structure.

Last modified

• 08/14/2017

Creator

• Charles H. Dowding
• Mickey L. Snider

DOI

• https://doi.org/10.21985/N2GV0G

Publisher

• American Society of Civil Engineers

Keyword

• Autonomous Crack Measurement

Date created

• 2004

Related url

•  http://ascelibrary.org/doi/book/10.1061/9780784407448

Resource type

• Part of Book

Source

• Geotechnical Engineering for Transportation Projects

License

• All rights reserved