静态电阻与光纤应变测试技术在岩土地质力学模型试验中的应用  

The strain measurement techniques based on the static resistive strain gauge and optical fiber strain sensor and their applications in geo-mechanical model tests

作　　者：李勇[1] 杨强[2] 朱维申[1] 李术才[1] 张强勇[1] 王汉鹏[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,济南250061 [2]济南市公路管理局,济南250013

出　　处：《山东大学学报（工学版）》2009年第3期129-134,共6页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(90510019;59939190;50579033);国家留学基金委2007国家建设高水平大学公派留学生资助项目

摘　　要：结合沪蓉西八字岭分岔式隧道三维地质力学模型试验,将静态电阻应变技术和光纤应变测试技术应用于地质力学模型试验中,并通过应变测试得到洞室周围关键点主应力的大小和方向.同时将试验测试结果与数值模拟结果进行对比分析,取得了较好的一致性.试验结果证明,只有将电阻应变片测试技术和光纤应变测试技术有机结合,才能得到较好的试验数据.Combined with the technologies used in the 3D geomechanical model test of the Baziling branching-out tunnel, how to apply the two strain measurement technologies to the geomechanical model tests and how to get the values and angles of the principle stress of the measuring points through the received monitoring data of strain were given. Then, the tests measuring results were compared with the numerical simulation results, which were found to be in good agreement. The tests results proved that better experimental data could only be obtained by the combination of resistive strain measuring and optical fiber strain measuring.

关 键 词：静态电阻应变测试 光纤应变测试 地质力学模型试验 数值模拟 岩土工程 

分 类 号：O319.56[理学—一般力学与力学基础]