Long-term Durability And Its Influencing Factors Of Prestressed Anchorage System

Prestressed anchorage was introduced to china in 1950s.In now,it has been widely used in the mining,transportation,municipal,etc.In China's major large-scale infrastructure construction projects,it can be seen the shadow of prestressed anchorage structural applications.But,the durability of anchor is lack of knowledge.So,we can't evaluate the health status and the service life of the anchor structure.This article relies on the State Key Basic Research and Development Program(973 Program)project—"Cycle life evolution and security control of large hydropower's high slope" sub-topics "rock anchoring mechanism and evolution function of high and steep slope".for the purpose of studying long-term durability of prestressed anchorage system and guiding production practice,this paper analyzes the geotechnical anchor structure corrosion key factors.Using the actual project field research and experiments have to study the structure corrosion characteristics of anchorage.1.Through researching home and abroad Geotechnical Research Progress of anchoring engineering structures,the factors that affect the durability of the anchor structure are analyzed.2.Based on carrying out field research and sampling mining anchor,it analysis the environmental factors of anchor structure durability,evaluates the state of anchorage engineering structures health and their geotechnical corrosive environment.It has proposed anchor structure evaluation methods of corrosion and the reference standards.3.Conducting laboratory experiments to test the extent of corrosion damage and the damage reasons,it put forward the regularity and characteristics of the corrosion in geotechnical p environment.