摘要
研制了压电陶瓷弯曲元—动三轴试验系统 ,解决了三轴仪内饱和试样的剪切波速测量问题 ,并阐述了其原理。在此基础上 ,通过先期振动控制重塑试样的初始剪切模量 ,并通过不排水应变控制循环三轴试验研究了钱塘江饱和粉土和粉砂的液化性质。
In this study,bender elements measuring system was developed on an existing dynamic triaxial apparatus.The measuring technique of determining shear wave velocity in the saturated specimen and its principle are presented.Based on the new measuring system,the elastic shear modulus of the reconstituted specimens are controlled by prestraining to match those in situ with the intention to partly restore the original fabric.Undrained cyclic strain-controlled tests are conducted to analyze the liquefaction potential of the studied soil.The range and mean value of critical shear strain are presented based on the test results,which provides a basis for the evaluation of liquefaction potential.Comparison is also made between the results of the conventional reconstituted specimens and the improved specimens.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2000年第6期682-685,共4页
Chinese Journal of Geotechnical Engineering
关键词
压电陶瓷弯曲元初始剪切模量
三轴试验
土体
piezoceramic
bender element
elastic shear modulus
critical shear strain
