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本文介绍在香港条件下,选择了14种土工布供作为期九个月的暴露试验;12种是非编物,一种是编织物,还有一种是合成纤维。它们的物理性质列入表1中。试验场地位于香港岛北岸的北角。每种土工布取六个试样,大小为1m×1m。头两个试件夹在木板之间,用聚丙烯覆盖,并存放在室温10°～15℃范围的房内。其它四个试样则固定在无盖的木架上,朝南与垂线成45°倾斜。室外暴露期约为一个月、三个月、六个月和九个月。所有试样的暴露试验从1987年1月19日开始,终止日期分别在1987年2月26日,1987年4月27日,1987年7月23日和1987年10月26日结束。在暴露六个月末发现,只有少数几块损坏的土工布留在架上,对它们进行拉伸试验表明强度非常低。
This article describes the selection of 14 geotextiles for a nine-month exposure test under Hong Kong conditions; 12 are non-woven, one is woven, and the other is synthetic. Their physical properties are listed in Table 1. The test site is located in North Point on the northern shore of Hong Kong Island. Take six samples of each geotextile, the size of 1m × 1m. The first two specimens were sandwiched between boards covered with polypropylene and stored in a room at a temperature of 10 ° to 15 ° C. The other four specimens were mounted on a covered wooden shelf and tilted 45 ° to the vertical at a 45 ° angle. Outdoor exposure period of about one month, three months, six months and nine months. The exposure test for all samples commenced on January 19, 1987 and ended on February 26, 1987, April 27, 1987, July 23, 1987, and October 26, 1987, respectively. At the end of six months of exposure it was found that only a few damaged geotextiles were left on the shelves and tensile tests on them showed that the strength was very low.