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最近,山东黄河河务局为防止险工砌石坝岸发生裂缝、滑塌等险情,提出了坝岸墙背应用土工织物加筋土的设想。根据这一设想,以历城盖家沟险工21号坝为例,进行了抗滑稳定分析和经济比较。结果是,抛石固根、墙背填土不加筋,根石坡度1:1.5时,基底抗滑安全系数k=0.81;根石坡度增至1:2,k值增为0.96。墙背填土加筋以后,稳定性提高,k值增至1.3。在安全系数相同条件下,根石坡度1:1.5、墙背填土加筋比根石坡度1:2、墙背填土不加筋,每米工程长可节省投资204元。
Recently, the Yellow River Administration of Shandong Province to prevent the dangerous masonry dam cracks, slump and other dangers, put forward the idea of using geotextiles reinforced earth reinforcement. According to this idea, take Guixiagou No. 21 Dam in Licheng City as an example, carried out the stability analysis of anti-sliding and economic comparison. As a result, the stability of the anti-slide safety factor k = 0.81 when the stone root slope is 1: 1.5 and that of the root stone is increased to 1: 2 and the value of k is increased to 0.96. After the backfill reinforcement, the stability improved, k value increased to 1.3. In the same safety factor conditions, the root of the stone slope of 1: 1.5, wall backfill reinforcement ratio of 1: 2 root gradient, wall backfill without reinforcement, long project per meter can save 204 yuan investment.