(1) should be based on the anchor corrosive environment survey test, select the appropriate method of preservation.
(2) permanent anchor should be double corrosion.
(3) is not in the corrosive environment of permanent and temporary anchor bolt can use a simple method of preservation.
(4) anchorage section, paragraph A method for preserving freedom and anchor bolt head should be considered in the construction and use of corrosion will not damage its function.