Device and method for testing impermeability and durability of precast concrete joint

Abstract

The invention relates to the technical field of prefabricated bridge durability testing and particularly relates to a device for testing the impermeability and durability of a precast concrete joint.The device comprises a test box body. The test box body comprises a chloride ion solution cavity and a vacuum cavity; a clapboard for separating the chloride ion solution cavity from the vacuum cavityis arranged between the two cavities; an opening is formed in the bottom of the chloride ion solution cavity, the width of the opening is larger than that of an upper joint of a tested part, a waterpermeable membrane is arranged at the bottom of the chloride ion solution cavity, and a barrier plate is further arranged at the bottom of the chloride ion solution cavity and slidably connected withthe side wall of the chloride ion solution cavity; the box body is connected with a pneumatic pump and a vacuum pump, the pneumatic pump is connected with the chloride ion solution cavity, and the vacuum pump is connected with the vacuum cavity; a solution recovery guide pipe is connected between the chloride ion solution cavity and the vacuum cavity, and a control valve is arranged on the solution recovery guide pipe. The invention further provides a precast concrete joint impermeability durability testing method, and the defect that durability testing of joints between precast units lacks inthe existing bridge detection field is overcome.

Description

technical field [0001] The invention relates to the technical field of bridge structure joint durability testing, in particular to a device and method for testing the impermeability durability of precast concrete joints. Background technique [0002] In the field of prefabricated and assembled bridges, the durability of the joints greatly affects the overall service life of the bridge. For example, if the joints of the prefabricated box girder are not dense, the grouting effect of the prestressed steel bars passing through the joints will not be good. , and it is more likely to cause chloride ions in the external environment to corrode steel bars. [0003] In the existing technology, most of the concrete permeability tests are sampled on site, and then brought back to the laboratory for inspection and testing. However, the above test methods, on the one hand, belong to destructive testing, on the other hand, they cannot be tested on site, and require laboratory testing. Pro...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device and method for testing the impermeability durability of precast concrete joints, so as to solve the problems in the prior art that cannot be tested on site and cause damage to the road surface

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