岩土工程学报Issue(10)：1872-1878,7.DOI:10.11779/CJGE201410015
砂雨法制备砂土地基模型控制要素试验研究
Experimental study on control element of sand pourer preparation of sand foundation model
摘要
Abstract
In order to know the main effect of sand foundation model prepared by sand pourer on the relative density Dr, a set of point and line type sand shakeout device is designed. The variation rules of Dr with the drop height, size of sand production pore, total flow of sand production head and average speed are discussed. The spatial uniform distribution of Dr is analyzed. The tests show that:(1) With the increase of the drop height and potential of sand particles, Dr increases, but the growth rate gradually decreases. So it can be thought that when the relative increase of K of Dr is ±3%, the average value of Dr corresponding to this drop height is called the stable relative density. (2) The stable relative density has negative linear correlation with the size of sand production pore. Under the same condition of total flow, the average speed of sand production head and the stable relative density present nonlinear characteristics. The effect of the total flow of sand production head on the stable relative density is not obvious. (3) For the spatial uniformity distribution characteristics of Dr in the same plane or different planes along the depth, the uniformity of Dr in the center of model box is better than that at the four sides and four corners. (4) The error of actual relative density prepared by the line type of sand production mouth is smaller than that of the point type for target relative density, so the line type of sand production mouth has better controllability for Dr.关键词
砂土地基模型/砂雨法/标准砂/相对密实度/控制要素Key words
sand foundation model/sand pourer/standard sand/relative density/control element分类
建筑与水利引用本文复制引用
李浩,罗强,张正,张良,蒋良潍..砂雨法制备砂土地基模型控制要素试验研究[J].岩土工程学报,2014,(10):1872-1878,7.基金项目
国家重点基础研究发展计划（973计划）项目（2013CB036204）；中央高校基本科研业务费专项资金项目 （）
