Large-Scale Quantification of Wrinkles in a Smooth Black HDPE Geomembrane
Large-Scale Quantification of Wrinkles in a Smooth Black HDPE Geomembrane
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DOI：
10.1061/(asce)gt.1943-5606.0000643
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发表时间：
2012-06
影响因子：
3.9
通讯作者：
M. Chappel;R. Brachman;W. A. Take;R. Rowe
中科院分区：
文献类型：
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作者：
M. Chappel;R. Brachman;W. A. Take;R. Rowe
摘要皱褶是土工膜暴露在太阳光下时，由于热膨胀受到限制而产生的波浪或波纹。如果皱纹处或附近有一个洞，皱纹会大大降低土工膜作为水力屏障的有效性，具体取决于皱纹的数量、长度和宽度。低空航空摄影和数字图像分析被用来量化的性质和皱纹的程度，开发了一个炎热和阳光明媚的一天，在一个光滑的，黑色的，1.5毫米厚的高密度聚乙烯（HDPE）土工膜超过55米140米的区域。皱纹在一天中变化很大，从早上最少的皱纹增加到中午后的最大皱纹，然后在下午晚些时候减少。在特定条件下，皱纹分别占8：45、12：25和17：15时调查的整个区域的3%、21%和7%。观察到相邻褶皱之间的连接，以产生显著的互连。
AbstractWrinkles are buckles or waves that develop from restrained thermal expansion when the geomembrane is left exposed to solar heating. Wrinkles can substantially reduce the effectiveness of the geomembrane as a hydraulic barrier if a hole is at or near a wrinkle, depending on the number, length, and width of wrinkles. Low altitude aerial photography and digital image analysis are used to quantify the nature and extent of wrinkles that developed over one hot and sunny day in a smooth, black, 1.5-mm-thick high-density polyethylene (HDPE) geomembrane over a 55 m by 140 m area. Wrinkles were found to significantly vary over the course of the day, increasing from the fewest wrinkles in the morning to a maximum just after noon before decreasing toward the late afternoon. For the specific conditions examined, wrinkles were found to occupy 3%, 21%, and 7% of the entire area surveyed at 8:45, 12:25, and 17:15, respectively. Connections between adjacent wrinkles were observed to create significant interconnect...