| In the 50 years since the first ground anchors were used in Japan ,the anchors have been used for various purposes in at least 30,000projects. Some anchors constructed in early times have aged and lost their performance, resulting in slope deformation and exposure of broken anchor heads.Establishing of efficient and rational maintenance scheme for existence anchors are necessary.Various integrity investigation techniques and remedial measures have been proposed but have not been systematically organized.Precious data on inspections and measures taken are scattered, and the lack of a system and data impede the efficient maintenance of anchor structures.This paper describes our effort to improve maintenance of anchors publishing new manuals for Ground anchor maintenance. |
