基于三轴试验的全风化砂岩邓肯-张模型参数研究  

Parameters of Duncan-Zhang model for fully weathered sandstone based on triaxial test

作　　者：尹洪强 洪文彬[1] 张树仁 Yin Hongqiang;Hong Wenbin;Zhang Shuren(China Water Northeastern Investigation,Design&Research Co.,Ltd.,Changchun 130061,China;China Construction Sixth Engineering Bureau Water Resources and Hydropower Construction Group Co.,Ltd.,Tianjin 300000,China)

机构地区：[1]中水东北勘测设计研究有限责任公司,吉林长春130061 [2]中建六局水利水电建设集团有限公司,天津300000

出　　处：《山西建筑》2022年第20期105-107,共3页Shanxi Architecture

摘　　要：某机场道路建设项目的回填深度较大,填筑料场存在全风化砂岩地层,为保证回填质量,研究全风化砂岩作为填筑土体的工程特性,通过室内三轴固结排水试验,查明全风化砂岩土体的应力-应变关系,获取全风化砂岩的抗剪强度参数,得到全风化砂岩的邓肯-张模型的8个参数。试验结果表明,不同围压下的试样均为鼓胀变形破坏,内聚力为4.28 kPa,内摩擦角为38.27°。试验结果可为工程设计、工程所在地区土体参数的获取及数值分析计算提供参考依据。A certain airport road construction project of backfilling depth is larger,filling yard with weathered sandstone formation,to ensure the quality of backfill,study the engineering properties of weathered sandstone as the filling soil,through indoor triaxial consolidation test,find out the fully weathered sandstone soil stress-strain relationship,shear strength parameters of weathered sandstone,the 8 parameters of Duncan-Zhang model of fully weathered sandstone are obtained.The test results show that the specimens under different confining pressures are bulging deformation failure,cohesion of 4.28 kPa,internal friction angle of 38.27°.The experimental results can provide a reference for engineering design,soil parameters acquisition and numerical analysis.

关 键 词：全风化砂岩 三轴固结排水试验 邓肯-张模型 模型参数 

分 类 号：TU441.4[建筑科学—岩土工程]