隔震沟设计及在实际工程中的应用  

Isolation ditch design and its application in practical engineering

作　　者：薛松领 常军[1] 张也[1] 

机构地区：[1]苏州科技大学土木工程学院

出　　处：《苏州科技学院学报（工程技术版）》2016年第4期22-25,共4页Journal of Suzhou University of Science and Technology （Engineering and Technology）

基　　金：江苏省自然科学基金项目(BK20141180);江苏省结构工程重点实验室开放课题(Z1405);江苏省建设系统科技项目(2015ZD77);苏州科技大学研究生创新项目(SKCX15_045)

摘　　要：隔震沟是阻止地面震动传播的重要措施,通过对实际工程的分析,设计出一条隔振沟降低振源对周边精密仪器的影响。通过对现场可能产生的荷载采集,将采集的荷载输入到有限元模型中作为模型中的动力荷载。其中,土单元的本构模型为摩尔库伦模型,根据当地的工程地质勘查报告获取模型参数。通过GTS有限元分析,设置了种3种情况,一:无隔震沟的地面的加速度时程曲线,二:不同深度的隔振沟的地面的加速度时程曲线,三:不同宽度的隔振沟的地面的加速度时程曲线,最终根据精密仪器对振动影响的最低要求确定隔震沟的设计尺寸,验证了隔震效果。结果表明:将隔震沟应用到实际工程中,该隔震沟能阻止地面震动传播。The isolation trench is an important measure to prevent the spread of the ground vibration. Based on the practical engineering, an isolation trench was designed to decrease the influence of the vibration source on the peripheral precision instruments. By means of the load acquisition which may be produced in the field, the collected load was input into the finite element model as the dynamic load in the model. The constitutive model of the soil element is the molar Kulun model, and the model parameters are obtained according to the local engineering geological survey report. Through the GTS finite element analysis, the paper presents three working conditions： one is that of the ground acceleration curve with no isolation ditch conditions, the other is that of curves of isolation trench in different depth, and the last is that of curves of isolation trench in different width, and the design size of the isolation trench is determined ultimately according to the minimum requirement of the peripheral precision instruments for the vibration influence, and the isolation is verified. The result shows that when the isolation trench is applied to the actual engineering, it can prevent the spread of the ground vibration.

关 键 词：隔震沟 GTS 隔震 摩尔库伦准则 

分 类 号：TV542[水利工程—水利水电工程]