两种土样剪切波速测试方法的对比试验研究  

STUDY ON TWO TYPES OF TECHNIQUES OF SHEAR WAVE VELOCITY TEST FOR SOIL SPECIMEN

作　　者：程国勇[1] 张立[2] 王建华[3] 

机构地区：[1]中国民用航空学院,天津300300 [2]国家粮食储备局郑州科学研究设计院,河南郑州450053 [3]天津大学,天津300072

出　　处：《岩石力学与工程学报》2005年第23期4368-4372,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：天津自然科学基金资助项目(023607511)

摘　　要：扭剪波传感器是一种刚刚兴起的土样剪切波速测试装置。将扭剪波测试方法与弯曲单元测试方法通过试验进行了对比,对比结果表明:无论对于粘性土还是砂性土,弯曲单元方法测试结果比扭剪型剪切波速传感器测试结果偏低20%左右。然后用理论剪切波速已知的有机玻璃棒对扭剪型剪切波速传感器的测试结果进行了验证,发现该方法测试结果与理论值相差仅1.2%。这表明用扭剪波测试土样的剪切波速是一种更加可靠的方法。Torsion shear wave transducer is a newly developed device to test the shear wave velocity of soil specimen which has not been reported before. Parallel shear wave velocity tests are carried out on cohesive and cohesionless soil specimens by using torsion wave transducer and another method, bending element method, separately. The results show that test results by the bending elements are 20 percent lower than that obtained from torsion wave transducer for the same kind of soil specimen under the same consolidation condition. To check which device is more reliable, another test is performed in which the shear wave velocity of plexiglass rod, whose true shear wave velocity is known, is tested with torsion wave transducer, and the test result has only 1.2% relative error to the real value, which means that the torsion wave transducer is a more reliable shear wave velocity test device.

关 键 词：土力学 土样剪切波速 弯曲单元法 扭剪波 扭剪型剪切波速传感器 

分 类 号：TU413[建筑科学—岩土工程]