Method for reinforcing underwater structure by fiber-reinforced composite material grid ribs

Abstract

The invention relates to a method for reinforcing an underwater structure by using fiber reinforced composite material lattice ribs, which comprises the following steps: treating the concrete surface of the underwater structure to be reinforced; coating at least one layer of the fiber reinforced composite material lattice ribs on the surface of the underwater structure to be reinforced; setting an isolator outside the underwater structure to be reinforced, and making the height of the isolator be more than or equal to the height of the fiber reinforced composite material lattice ribs coated on the surface of the underwater structure to be reinforced; sealing concrete at the bottom of the isolator; and filling underwater epoxy resin or underwater non-dispersed mortar or underwater non-dispersed concrete into the clearance between the isolator and the structure to be reinforced. The process is simple; because the treatment of abandoning and preventing water is not needed during construction, and the periphery of the underwater structure to be reinforced does not need to arrange a cofferdam, the construction process has little influence on a navigation channel; and the reinforcing cost is low, the reinforcing is quick, the construction period is short, and the durability of the structure can be effectively improved.

Description

technical field [0001] The invention relates to a method for strengthening underwater structures, in particular to a method for strengthening underwater structures such as bridge foundations, pier columns and dam bodies by using fiber-reinforced composite material grid bars. Background technique [0002] Buildings such as houses, bridges, tunnels, dams, etc., will reduce their bearing capacity and durability during use due to material aging, increased loads, and structural damage, which will affect the safety of the buildings in use, especially Especially for structures located under water, the problem is particularly prominent due to the harsher environment than above water. [0003] For example, according to statistics, as of 2007, there were about 520,000 bridges of various types in my country. Among them, a considerable number of bridge foundations and piers are located in the water, and the service conditions and environment of the bridge underwater structure are worse...

AI Technical Summary

Problems solved by technology

The paste FRP reinforcement method applies the ordinary water reinforcement method underwater, which has the advantages of convenient construction, short construction period, and good durability of the FRP reinforcement method. At the same time, it has a significant market advantage in cost saving. When the cloth material is wound and pasted for reinforcement, because the water wrapped inside cannot be smoothly removed, the bonding interface between FRP and the structure to be reinforced is generally hollow, and compared with the use in a dry environment, the reinforcement effect is greatly reduced

Therefore, the pasting and winding construction of ordinary FRP cloth in the underwater environment cannot achieve the expected reinforcement effect

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