Anchor bars at small depth side are always in press condition and timbering effect is limited from excavation and timbering of the tunnel to a steady displacement field and stress field.
从隧道开挖支护直至隧道位移场应力场稳定，埋深浅侧的锚杆基本上处于受压状态，支护效果有限。
With optical displacement meter, non-electricity detection can be realized, which helps to avoid the effect of strong electromagnetic field and humidity.
利用光学测量变形，可以实现探测器无电化设计，使得测量不受强电磁场和湿度的影响。
By long core displacement experiment and numerical simulation, has made comparative analysis of development effect for injection water, WAG, GAW, and injection gas in PuBei oil field.
通过长岩心驱替实验和数值模拟研究，对葡北油田在注水、水气交替、气水交替、注气驱替方式下的开发效果进行了对比研究。
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