大鳴門橋の地盤調査

概要

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Ohnaruto Bridge, one of the Honshu Shikoku connecting bridge, is a suspension bridge of 876 m center span located in Naruto Straits. Foundation rock consists of the Cretaceous sandstone and shale which have remarkable stratifications of monoclinic structure dipping to SE at 45°〜50°. Engineering properties of the submarine foundation rock were researched by many core drillings, in-situ load tests in the holes and geophysical loggings. Estimation for the strength of rock mass was performed mainly by the deformation modulus of in-situ load test and total point method which was attempted for the stratified rock of Ohnaruto Bridge foundation. This method is a kind of synthetic classification of rock grade evaluating characteristics of drilled core, such as hardness, shape, crack width and nature of cracks.
一般社団法人日本応用地質学会の論文
1976-12-30