ZHANG H, LI Jun, CHANG Zhe, WANG Zhenqing,et al.Composite mechanical test of polypropylene waterproof component lining in underground granary[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):172-178.

doi:10.16186/j.cnki.1673-9787.2021070056

Received:2021/07/15

Revised:2021/10/25

Published:2023/07/25

Composite mechanical test of polypropylene waterproof component lining in underground granary

ZHANG Hao, LI Jun, CHANG Zhe, WANG Zhenqing

School of Civil Engineering，Henan University of Technology，Zhengzhou 450001，Henan，China

Abstract:In order to solve the waterproof problem of the underground granary wall，the lining polypropylene plastic-concrete specimen was designed and produced，and the composite load test was carried out subjected to combined axial pressure and water pressure.The failure mode and internal force variation of the plastic waterproof component subjected to combined axial compression and water pressure were studied and analyzed，and the ultimate water pressure bearing capacity of the polypropylene plastic waterproof component was obtained.The test results showed that under axial pressure of 1 800 kN，the joint welds were not completely destroyed with water pressure reaching 153 kPa and the plastic waterproof plate ruptured with the water pressure increasing to 160 kPa.The displacement of the plastic waterproof plate increased with the increase of the load，and the mid-span displacement was much larger than the node displacement，the maximum displacement was 5.8 mm.The strain of plastic waterproof plate increased with the increase of load，and the mid-span strain of four nodes was less than that of nodes and the mid-span strain of two nodes with the unevenly distributed maximum strain.The research results could provide references for the waterproof and moisture-proof design of underground granaries and similar underground structures.

Key words:underground granary;polypropylene;node;axial compression;water pressure

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