地下粮仓内衬聚丙烯防水构件复合受力试验  

Composite mechanical test of polypropylene waterproof component lining in underground granary

作　　者：张昊[1] 李军 常哲 王振清[1] ZHANG Hao;LI Jun;CHANG Zhe;WANG Zhenqing(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,Henan,China)

机构地区：[1]河南工业大学土木工程学院,河南郑州450001

出　　处：《河南理工大学学报（自然科学版）》2023年第4期172-178,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(51708182);河南省科技攻关项目(202102110122);河南工业大学高层次人才科研启动基金资助项目(2018BS077)。

摘　　要：为解决地下粮仓仓壁防水难题,设计和制作内衬聚丙烯塑料-混凝土仓壁试件,并对其进行轴压和水压复合加载试验,研究内衬塑料防水构件在轴压和水压共同作用下的破坏形态和内力变化规律,得到了聚丙烯内衬塑料防水构件的水压承载力。结果表明:轴压保持在1 800kN,水压达到153 kPa时,节点焊缝发生未完全破坏;水压加载至160 kPa时,塑料防水板发生破裂;塑料防水板的位移随荷载增大而增大,跨中位移远大于节点位移,最大位移为5.8 mm;塑料防水板应变随荷载增大而增大,四节点跨中应变小于节点和两节点跨中应变,且应变最大值分布不均匀。研究结果可为地下粮仓和类似地下结构的防水防潮设计提供参考。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 sub-jected 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 compo-nent was obtained.The test results showed that under axial pressure of 1800 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 maxi-mum 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.

关 键 词：地下粮仓 聚丙烯 节点 轴压 水压 

分 类 号：TU57[建筑科学—建筑技术科学]