Prestressed rock and soil anchor is a forefront subject developed rapidly over the past twenty years. Its development depends on the new research results of other relative subjects. Before 1970s, the tendon material of prestressed rock and soil anchor was almost high-strength wires. With development of prestressed material, strand became the main tendon material of prestressed rock and soil anchor because it has higher strength and is no need to cut accurately.
Prestressed rock and soil anchor is a kind of compound structure which can transfer cable force to the stratum. One of its end is fixed into the steady stratum, another end is closely integrated with the reinforced structure. After it was installed, the reinforced structure is prestressed to restrict its harmful distortion and displacement.
Prestressed rock and soil anchor is often corrupted by the groundwater (specially groundwater with corrosive medium) and stress corrosion under high stress. It is important that using high corrosive strands as tendons of prestressed rock and soil anchor to guarantee its safety, durability and security during the service life. In PTI specification named recommendations for prestressed rock and soil anchors, there is a rule that epoxy coated strand used in prestressed rock and soil anchor must be filled epoxy-coated strand.
Based on the actual situation of prestressed rock and soil anchors at present, FASTEN imported the product line of filled epoxy-coated strand which can meet requirements of ASTM A882/A882M, can developed its own prestressed rock and soil anchors which can provide perfect anti-corrosive and durable capability.