SYMPOSIA PAPER Published: 01 January 1990
STP17248S

A Case Study of Geotomography Applied to a Detailed Investigation of a Highway Bridge Foundation

Source

Three types of geotomographic surveys (seismic tomography, resistivity tomography, and radar tomography) were conducted at a highway bridge pier construction site to investigate rock characteristics. After the geophysical investigation, bedrock was excavated to construct the bridge foundation. Geological surveys and plate-loading tests were carried out on the excavated surface. The geophysical and geological results were generally in good agreement.

Seismic tomography can distinguish highly fractured rock from unfractured rock, and resistivity tomography and radar tomography can classify rock according to different water contents. The combined use of these three geotomographic surveys made it possible to detect the anomalous zone which was highly fractured and saturated.

Author Information

Saito, H
Geotechnical Institute, OYO Corp., c/o Earth Resources Lab., M.I.T., Cambridge, MA
Shima, H
Geotechnical Institute, OYO Corp., Saitama, Japan
Toshioka, T
Geotechnical Institute, OYO Corp., Saitama, Japan
Kaino, S
Kansai Branch Office, OYO Corp., Osaka, Japan
Ohtomo, H
Head Office, OYO Corp., Tokyo, Japan
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Details
Developed by Committee: D18
Pages: 17–34
DOI: 10.1520/STP17248S
ISBN-EB: 978-0-8031-5155-0
ISBN-13: 978-0-8031-1403-6