Test device and test method for detecting impermeability of waterproof membrane under tension

Abstract

The invention discloses a test device and a test method for detecting the impermeability of a waterproof coiled material in a stretched state. The test device for detecting the impermeability of a waterproof coiled material in a stretched state includes a simple material stretching device and a fixed and fixed waterproof coiled material. Indenter device, the test method of the test device for testing the impermeability of waterproof membranes under tension. The specific steps are to use a tape measure to measure the parallel distance between two groups of angle steels, and simultaneously screw the nuts on the two groups of screw rods outwards synchronously until The stretching of the waterproof membrane reaches 100%; fill the pressure head with water, and pressurize the pressure head with a manual hydraulic pump, so that the waterproof membrane can be stretched 100% and kept under a certain water pressure for 120 minutes. Observe whether the filter paper has discoloration and whether the waterproof membrane has water seepage, and make a judgment. The test device of the present invention has the advantages of simple structure, convenient installation and low manufacturing cost, and at the same time, the test method process of the test device for detecting the impermeability of waterproof coiled materials in a stretched state is simple and easy to operate.

Description

technical field [0001] The invention relates to a test method for waterproof coiled materials of open-cut tunnels, in particular to a test device and a test method for detecting the impermeability of waterproof coiled materials in a stretched state. Background technique [0002] Before the construction of waterproofing membranes, the main performance indicators of each batch of waterproofing membranes entering the site should be tested. The testing contents mainly include tensile test, elongation test, heat resistance, low temperature flexibility, cold bending temperature, low temperature Water permeability, tear performance, hot air aging test, soluble content test. However, after laying the waterproof membrane on the main structure, due to the thermal expansion and contraction of the main structure, the deformation joints will be greatly deformed. For example, in the construction of open-cut tunnels, a deformation joint is generally set at 30-90m, and the deformation joint...

AI Technical Summary

Problems solved by technology

Since there is currently no test method for testing the impermeability of materials in a stretched state, we do not know how much the repeated stretching and deformation of the waterproof membrane at the deformation joint will affect the impermeability of the waterproof membrane.

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