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Design and installation of micropiles and ground anchors for OHL support foundations

Neil R. CuerBranko ZadnikMichael Pietschke

出版	s.l., 2005
URL	http://books.google.com.hk/books?id=YyrBOAAACAAJ&hl=&source=gbs_api

註釋This report was prepared by a task force drawn from WG07 'Foundations of Cigre Study Committe 22' and provides a guide to the design and Installation of Micropiles and Ground Anchors for Overhead Line Support Foundations. Micropiles are small diameter cast-in-place piles with a diameter less than 300 mm and can be installed vertcally or with an inclination up to 20 degrees to the horizontal surface, they are principally loaded by axial forces. If micropiles are used only to resist tension loading they can also function as ground or rock anchors. Nevertheless micropiles are nonprestressed foundation elements no matter whether they are used as piles or as ground anchors.