Device and method for testing water permeability resistance of concrete joint under action of controllable lateral restriction

Abstract

The invention discloses a device and a method for testing water permeability resistance of a concrete joint under the action of controllable lateral restriction. The device and the method are used for testing the water permeability resistance of a test block at a new-old concrete joint part. The device comprises a double-layer square cylinder 4 used for placing a new-old concrete joint impervious test block 5, wherein the bottom of the square cylinder is sealed; an outer flange 14 is formed in an upper opening of the square cylinder; an inner flange 9 with a middle opening 10 is formed in the lower part of the square cylinder; the square cylinder 4 is separated into two parts, namely a test block compartment 6 and a water inlet compartment 13 by virtue of the inner flange; a force adjustment hole 16 which is used for conveniently adjusting and clamping the impervious test block 5 and transversely penetrates through double-thread screws 15 on two sides of the test block compartment is formed in the test block compartment; the concrete impervious test block is pressed by a left cover plate 1 and a right cover plate 2 on the top and cover plate fastening bolts 3; an elastic sealing gasket 8 is arranged on the inner flange; and the left cover plate and the right cover plate are fixedly pressed on the outer flange of the square cylinder by virtue of the fastening bolts. According to the device and the method disclosed by the invention, the water permeability resistance of the new-old concrete joint part under the action of controllable lateral restriction can be tested.

Description

technical field [0001] The invention relates to a test device for the water penetration resistance of the joints of new and old concrete structures caused by construction intervals. Background technique [0002] In the civil engineering industry, there are parts where there are joints in the concrete structure due to the construction interval, such as the concrete joints and post-casting strips in the basement, the subway station structure with a laminated wall structure, and the joints of the fabricated underground structure Parts, concrete stubble parts of underground passages, post-repair parts of other engineering structures, etc. When these engineering structures are located below the groundwater level, these joints are often the places where the leakage is relatively concentrated during the operation and use stage, which has a great impact on the later use of the structure and the durability of the concrete, and will also cause certain damage. In serious cases, it may...

AI Technical Summary

Problems solved by technology

For the anti-seepage ability test of such parts, the existing concrete anti-seepage instruments cannot simulate and control the extrusion force acting on the joints of old and new concrete on the anti-seepage test block, so the actual situation of such parts cannot be reasonably measured. Evaluate the impermeability

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