弱风化凝灰熔岩料的湿化变形试验研究

Study on Slaking Deformation Test of Weakly-weathered Tuffolava

为研究弱风化凝灰熔岩填筑料的湿化变形特性,采用大型三轴仪,对凝灰熔岩料进行了单线法湿化试验,试样直径300mm,高600mm,周围压力分4级,分别为200kPa、500kPa、800kPa、1200kPa,应力水平分5级,分别为0、0. 2、0. 4、0. 6和0. 8。试验获得了弱风化凝灰熔岩料的湿化轴向应变、湿化体变应变与周围压力、应力水平的相关性,并整理了湿化模型及模型参数。提出的湿化模型及参数可作为大坝填筑料湿化变形分析研究的基础。

In order to research slaking deformation characters of filling material composed of weakly-weathered tuffolava,using the large-scale triaxial test equipment to conduct slaking test with single-line method for tuffolava,the test specimen is 300 mm of the diameter and 600 mm high,the pressures are divided into four grades,respectively are 200 kPa,500 kPa,800 kPa and 1200 kPa,the stress levels are divided into 5 grades,being respectively are 0,0. 2,0. 4,0. 6 and 0. 8. The test obtained the correlation between of slaking axial strain,slaking body strain and surrounding pressures and stress level,and put in order the slaking model and model parameters. Slaking model and its parameters is put forward to act as the foundation of dam filling material slaking deformation analysis.