Electrical isolation prestressed anchorage system and construction and installation method thereof

Abstract

An electrical isolation prestressed anchorage system comprises a work anchor plate, an anchor backing plate, a work clamping piece, a prestressed tendon, a slurry body, a structure rib and concrete which are installed sequentially, and further comprises insulating parts including an insulating anchor cover, a crush-resistance insulating pad, an insulating neck bush, an insulating connector, an insulating corrugated pipe and the like; the insulating anchor cover is fixed to the anchor backing plate through a fastening part, so that the work anchor plate is completed covered; the work anchor plate is matched with the anchor backing plate, and the crush-resistance insulating pad is arranged between the end surface of the anchor backing plate and the end surface of the insulating neck bush; the crush-resistance insulating pad is of an annular structure, the insulating neck bush is installed in the anchor backing plate, the outer diameter of the insulating neck bush is matched with the inner diameter of the anchor backing plate, and the insulating neck bush is connected with the insulating corrugated pipe through the insulating connector; and the middle portion of the cylindrical surface of the insulating connector is provided with an assembling hole for being connected with a grout pipe for pouring of insulating slurry. The electrical isolation prestressed anchorage system is connected with an electrical isolation performance detector, and then an electrical isolation anchorage system capable of conducting detection can be formed. The electrical isolation prestressed anchorage system is reasonable in structure, quite convenient and quick in installation and construction and capable of achieving nondestructive testing of engineering.

Description

technical field [0001] The invention relates to a prestressed anchoring system, in particular to an electrically isolated prestressed anchoring system and a construction and installation method thereof. Background technique [0002] Prestressed concrete structures are the main stress-bearing components of large-scale infrastructure such as bridges and railways. Corrosion of prestressed tendons will affect the durability of prestressed concrete structures and even lead to prestressed failure; therefore, the anticorrosion of prestressed structures has always been Attention and research in the industry. [0003] For anti-corrosion protection of prestressed structures, it is necessary to isolate the prestressed tendons from the external environment to form an internal airtight structure to prevent the external environment from electrochemically corroding the prestressed tendons; and the usual anti-corrosion methods mostly use plastic bellows and plastic The form of the anchor c...

AI Technical Summary

Problems solved by technology

[0003] For anti-corrosion protection of prestressed structures, it is necessary to isolate the prestressed tendons from the external environment to form an internal airtight structure to prevent the external environment from electrochemically corroding the prestressed tendons; and the usual anti-corrosion methods mostly use plastic bellows and plastic The form of the anchor cover body forms an anchor unit with poor airtightness, which cannot achieve good electrical isolation performance, and cannot effectively detect the prestressed anti-corrosion performance; the patent announcement number is: CN 202706578U, and the invention name is "A The insulated anchors described in the utility model patent of Insulated Prestressed Anchors for Concrete Prestressed Tensioning are only considered from the perspective of insulation of contact parts, not from the perspective of the entire system

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