Recently a research team at Ohio University,USA,conducted a unique full-scale feld load test to simulate the aeration pipe installations at a copper extraction mine operated in Chile.The overliner material taken from ...Recently a research team at Ohio University,USA,conducted a unique full-scale feld load test to simulate the aeration pipe installations at a copper extraction mine operated in Chile.The overliner material taken from the mine was used in recreating the in situ conditions.Electric heaters were utilized to raise the temperature inside each pipe to simulate the essential element of the copper extraction process.The maximum vertical deflection reached by the test pipes was close to 20%,when the simulated heap pile height was 80 m.The plastic pipes and the overliner material were also tested in the laboratory.Based on the results,the maximum heap pile fll depth was recommended for the aeration system.The results indicated that the vertical deflection was the primary performance index for the aeration pipes installed in heap piles at mines.Lastly,the pipe made of polypropylene resin was super.展开更多
为研究相邻基坑间堆载情况下的变形特点,利用岩土有限元软件PLAXIS 3D Foundation进行数值模拟,计算和分析结果表明:当相邻两基坑为悬臂式或支撑式支护结构,且基坑间距不同时,基坑支护结构水平位移、基坑间地面沉降以及基坑底隆起存在...为研究相邻基坑间堆载情况下的变形特点,利用岩土有限元软件PLAXIS 3D Foundation进行数值模拟,计算和分析结果表明:当相邻两基坑为悬臂式或支撑式支护结构,且基坑间距不同时,基坑支护结构水平位移、基坑间地面沉降以及基坑底隆起存在规律性。并且通过工程实例,对基坑变形规律进行了验证。展开更多
文摘Recently a research team at Ohio University,USA,conducted a unique full-scale feld load test to simulate the aeration pipe installations at a copper extraction mine operated in Chile.The overliner material taken from the mine was used in recreating the in situ conditions.Electric heaters were utilized to raise the temperature inside each pipe to simulate the essential element of the copper extraction process.The maximum vertical deflection reached by the test pipes was close to 20%,when the simulated heap pile height was 80 m.The plastic pipes and the overliner material were also tested in the laboratory.Based on the results,the maximum heap pile fll depth was recommended for the aeration system.The results indicated that the vertical deflection was the primary performance index for the aeration pipes installed in heap piles at mines.Lastly,the pipe made of polypropylene resin was super.
