Auxiliary sample loading device for testing longitudinal water drainage of plastic water draining plate and use method thereof

Abstract

The invention provides an auxiliary sample loading device for testing the longitudinal water drainage of a plastic water draining plate and a use method thereof. The auxiliary sample loading device comprises a membrane opening drum, an air hole, a ball valve, a connector and an air suctioning ball, wherein the air hole is opened in the membrane opening drum; the ball valve is arranged on the air hole; one end of the connector is connected with the ball valve, and the other end of the connector is connected with the air suctioning ball. The auxiliary sample loading device and the use method provided by the invention have the beneficial effects that the plastic water draining plate can be easily sheathed in and taken out by attaching a latex membrane with good ductility on the membrane opening drum under the action of negative-pressure suctioning force, so that the testing efficiency is improved; when in assembly and disassembly, the plastic water draining plate is not directly contactedwith the latex membrane, so that the latex membrane can be prevented from being scratched by the plastic water draining plate, the utilization ratio of the latex membrane can be improved and the resource can be saved.

Description

technical field [0001] The invention relates to the technical field of devices for testing geosynthetic materials, and more specifically relates to an auxiliary sample loading device for testing longitudinal flow of plastic drainage boards and a method for using the same. Background technique [0002] Longitudinal water flow is the most important performance index of plastic drainage board. Longitudinal water flow test is a test method to measure its drainage performance. The test principle is to put plastic drainage board into latex film, put it into longitudinal water flow tester, and seal both ends Joints, apply 350kPa pressure to the pressure chamber, and maintain a constant pressure during the test, adjust the upstream and downstream water levels so that the water seeps under a hydraulic gradient of 0.5, measure the water seepage at regular intervals until the water seepage is stable, and finally calculate the plastic drainage according to the formula The longitudinal w...

AI Technical Summary

Problems solved by technology

[0003] When conducting the longitudinal water flow test, since the length of the plastic drainage board is relatively large, and the width of the latex film is very close to the width of the plastic drainage board, it takes a long time to put the plastic drainage board directly into the latex film and take it out from the latex film Time, soaked plastic drainboards are more difficult to handle

The latex film used in the longitudinal water flow test is relatively expensive, and the latex film is easily scratched by the end of the plastic drainage plate during the direct insertion and removal of the plastic drainage plate. If the latex film is damaged, it must be replaced with a new latex film, which will inevitably cost resources waste

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