冻融循环条件下格栅加筋粘土结构内摩擦角变化规律研究  

Changes of Internal Friction Angle of Geogrid-Reinforced Clay under Many Freezing-Thawing Cycles

作　　者：赵荣飞[1] 宓永宁[1] 潘学渊 高微[3] 刘艳华[1] 金丹[1] 

机构地区：[1]沈阳农业大学水利学院,沈阳110161 [2]大连市水利规划设计院,辽宁大连116021 [3]沈阳农业大学工程学院,沈阳110161

出　　处：《沈阳农业大学学报》2012年第4期509-512,共4页Journal of Shenyang Agricultural University

基　　金：沈阳农业大学青年教师科研基金资助项目(2011)

摘　　要：以沈阳市北二环加筋土工程为背景,对加筋粘土选用不同的填料压实度、初始含水率和加筋间距,安排二次正交旋转组合设计试验,得出多次冻融循环条件下不同加筋粘土试件内摩擦角的变化值。通过分析试验数据和数学计算,得出试件内摩擦角的变化值及试件填料压实度、初始含水率和加筋间距的回归方程,并对方程和各影响因素进行显著性检验。利用所得方程计算其他试验条件下的内摩擦角变化值。结果表明:计算值和试验值较为吻合,所得方程可用于格栅加筋土结构多次冻融循环后土体内摩擦角变化值的初步计算。根据回归方程分析各因素对加筋粘土试件内摩擦角变化值的影响规律,为工程实践提供理论参考。Based on the North Second Ring Road% reinforced soil project in Shenyang, using quadric orthogonal rotating design experiment, the internal friction angle changes value were obtaiued under given many freezing-thawing cycles for the geogrid- reinforced clay with different degree of compaction, moisture content and reinforcement spacing. Through analysis of the test data and mathematical calculation, the regression equation about the changes value related with fillers compaction degree, initial moisture content and reinforcement spacing, and test the conspicuousness about the equation and the influence factors were gained. With applying the equation to calculate the changes in the else test conditions, the results showed that the calculated values and experimental data fit well, the equation can be used for initial calculation of the changes under many freezing- thawing cycles. At the same time, the influence law of various factors on the changes value could be found according to the regression equation analysis, and provide theoretical reference for the engineering practice.

关 键 词：冻融循环 格栅加筋粘土 压实度 初始含水率 加筋间距 

分 类 号：TU41[建筑科学—岩土工程]