钢板与砂泥岩混合填土接触面力学特性试验研究  

Experimental study on mechanical properties of steel and sandstone mixed with mudstone interface

作　　者：王俊杰[1] 马伟[2] 梁越[1] 尹文[1] 

机构地区：[1]重庆交通大学国家内河航道整治工程技术研究中心、省部共建水利水运工程教育部重点实验室,重庆400074 [2]山东农业大学勘探设计研究院,山东泰安271018

出　　处：《水运工程》2014年第1期182-187,共6页Port & Waterway Engineering

基　　金：“十二五”国家科技支撑计划课题(2011BAB09B01和2012BAB05B04)

摘　　要：基于直接剪切试验原理,研究了钢板与砂泥岩混合填土接触界面的剪切力学特性。试验中,钢板采用Q235钢材制作;砂泥岩混合土料采用弱风化砂岩和泥岩的破碎颗粒料按照5种不同的颗粒级配曲线以质量比8∶2配制。试验结果表明,钢板与砂泥岩混合填土接触界面的剪切应力-位移曲线可用双曲线拟合;抗剪强度可用摩尔-库伦强度准则来描述;抗剪参数粘聚力值随土体特性粒径d10,d30,d50,d60,d90的增大呈先减小后增大的抛物线型变化;摩擦角值随土体特性粒径d10,d30,d50,d60,d90的增大呈先增大后减小的抛物线型变化;粘聚力和摩擦角与土体不均匀系数和曲率系数的相关性不明显。Based on the direct shear test theory, mechanical properties of steel and sandstone mixed with mudstone interface are studied by experiments. In the tests, steel plate is made from Q235 steel, soil materials of sandstone mixed with mudstone is composed of weak weathered sandstone and mudstone after crushing, soil material weights ratio of 8 ： 2 prepared by sandstone and mudstone with 5 different particle grading curves. The tests results show that the shear stress-displacement curve of steel and sandstone mixed with mudstone interface can be used by hyperbolic model fitting; shear strength can be described by the Mohr-Coulomb strength criterion; shear strength cohesion value decreases and then increases as a parabola with increase of the characteristics of soil particle size d10, d30, d50, d60, d90; friction angle values increase and then decrease as a parabola with increase of the characteristics of soil particle size d10, d30, d50, d60, d90; relations between cohesion and friction angle versus coefficient of uniformity and curvature coefficient are not obvious.

关 键 词：钢-土接触面 剪切力学特性 砂泥岩混合填土 试验研究 颗粒级配 

分 类 号：TU411[建筑科学—岩土工程]