Manufacturing method of underwater pre-stressed anchor cable outer anchor head multi-protection system

Abstract

The invention relates to a manufacturing method of an underwater pre-stressed anchor cable outer anchor head multi-protection system. According to the method, after anchor cable tension and locking meet designed force values and exposed end steel strands are cut off, a manufactured metal protection cover with a top oil nozzle and an anchor cable steel plate are firstly welded, connected and sealedreliably, then the top oil nozzle on the metal protection cover pours anticorrosion grease into the metal protection cover so that the metal protection cover can be filled with the anticorrosion grease, then the outer portion of the metal protection cover is wrapped by anti-seepage and anti-freezing concrete, paint is brushed to the portion of an anchor head for protection, and the underwater pre-stressed anchor cable outer anchor head multi-protection system is manufactured. By means of the multi-protection system, pre-stressed anchor cables of side slopes, hydraulic structures and overflowing tunnels below water level submerge lines of severe environments, especially alpine regions, can effectively resist environment corrosion, anchoring stress losses can be avoided or reduced, the service life of engineering can be prolonged, and the maintenance and reinforcement cost can be reduced.

Description

Technical field: [0001] The invention relates to the manufacture of an underwater prestressed anchor cable outer anchor head multiple protection system for the protection of the prestressed anchor cable outer anchor head of the slope below the submerged line of the water level in the severe environment, the hydraulic structure and the flow tunnel method. Background technique: [0002] The design service life of the prestressed anchor cable reinforcement project of water conservancy and hydropower is long and the operating environment is complex. Therefore, the durability of the anchor cable anchorage system often becomes the weakest link in the project, which poses a serious threat to the safety of hydraulic structures during the construction and operation periods. Under severe environmental conditions such as water flow change areas, splash areas, and chemical corrosion, the anchoring effect and durability of anchor cables are affected and limited, especially in alpine area...

AI Technical Summary

Problems solved by technology

[0002] The design service life of the prestressed anchor cable reinforcement project of water conservancy and hydropower is long and the operating environment is complex. Therefore, the durability of the anchor cable anchorage system often becomes the weakest link in the project, which poses a serious threat to the safety of hydraulic structures during the construction and operation periods.

Under severe environmental conditions such as water flow change areas, splash areas, and chemical corrosion, the anchoring effect and durability of anchor cables are affected and limited, especially in alpine areas where the temperature is low, the temperature difference between day and night is large, and there are many extreme weather environments. The protection and anti-corrosion of the outer anchor head of the anchor cable of the slope below the submerged line of the water level and the hydraulic structure put forward higher requirements. The protection structure of the conventional concrete or simple metal steel cover often has poor adaptability to the environment and is difficult to adapt to the environment. Meet construction and operation safety requirements

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