摘要
为了优化隧道围岩物理力学参数的反演方法并提高运算速度,文章提出了隧道工程动态增量位移正算反演分析法,并将该方法应用于青岛胶州湾海底隧道工程;建立了弹塑性动态增量位移反演预测模型,改进了传统的弹塑性正演优化反分析方法,衍生了作简化分析的基于施工过程的线弹性动态增量位移反演正算反分析方法;对青岛胶州湾海底隧道三个施工段计算位移和实测位移进行了比较。研究结果表明,动态增量位移反演正算反分析方法可反映动态施工过程中任意施工阶段间的增量量测信息,为变形控制技术的实施提供有力的保证;与传统的弹塑性正演优化反分析方法相比,可以提高效率,保证计算精度。
In order to optimize the inversion method for physical and mechanical parameters of tunnel surround-ing rock and to improve the computational speed, normal calculation back analysis for dynamic incremental dis-placement in tunnel engineering is presented in this paper and applied in the Jiaozhou Bay subsea tunnel in Qingdao. With the establishment of an inversion prediction model of elastic-plastic dynamic incremental dis-placement, and the improvement of traditional elastic-plastic forward-optimized back analysis method, a con-struction process based inversion normal calculation back analysis of linear elastic dynamic incremental displace-ment is derived that is used for simplified analysis. A comparison is carried out regarding the calculated displace-ment and actual displacement in three construction sections of the Jiaozhou Bay subsea tunnel. Study results show that dynamic incremental displacement inversion normal calculation back analysis can reflect the increment mea-sure information in any construction stage during dynamic construction, and guarantee the implementation of de-formation control techniques; compared with the traditional elastic-plastic forward-optimized back analysis method, the proposed one increases efficiency and ensures calculation accuracy.
出处
《现代隧道技术》
EI
北大核心
2014年第6期78-82,100,共6页
Modern Tunnelling Technology
基金
国家自然科学基金重点项目(No.41072234和No.50979052)
国家自然科学基金青年科学基金项目(No.50909056)
关键词
动态增量位移
正演反分析
监控量测
岩体力学参数
海底隧道
Dynamic incremental displacement Normal calculation back analysis Monitoring and measurement Mechanical parameter of rock mass Undersea tunnel
