Polyester-Resin Anchor Creep Study.

摘要

Anchorage systems have long been a weak link in obtaining reliable rock bolt system performance which utilizes nearly the full strength of the steel bolt. Mechanical anchors have proven unsatisfactory for use in certain types of rock and often slip or pull out long before the ultimate strength of the bolt can be realized. Interest was therefore expressed that high-strength, quick-setting resin anchors should be tested, which could effectively replace mechanical anchors, grouting, or both. Because the amount of creep which could be expected from the resin anchors in a rock bolt system was unknown, this research project was initiated to determine the long and short term creep and ultimate load characteristics of the rock bolt resin anchor system.