基于光纤光栅监测的地铁车站超深地下连续墙结构受力分析研究

Structure Stress Analysis of Super Deep Diaphragm Wall of Subway Station Based on Fiber Bragg Grating Sensors

为解决利用传统监测仪器在监测超深地下连续墙变形中难度大、效率低、误差大等问题,提出利用新型光纤光栅传感器对地下连续墙的应力、应变进行监测,再通过一系列措施,保证监测的有效性和可靠性,为后续的监测方法提供经验和参考。结果表明:利用新型光纤光栅应力计、应变计能有效解决超深地下连续墙变形监测难度大等问题;利用光纤光栅解调仪,实现了地下连续墙应力、应变数据实时可视化显示,为施工作业人员提供了实时连续墙变形信息。本文提出了利用光纤光栅传感器监测的方案及相关步骤,可转化为工程应用,对超深地下连续墙结构受力分析具有指导意义。

In order to solve the problem of great difficulty,low efficiency and big error in monitoring the stress and strain of the diaphragm wall by traditional monitoring instrument,a treatment technology is put forward to assure the validity and reliability of monitoring and then provides experience and reference for subsequent monitoring method by adopting a new type of optical fiber bragg grating sensor and other series of measures. The research shows that the new type of optical fiber grating sensor can be used to solve the problems such as the difficulty of monitoring the deformation of the ultra deep diaphragm wall,and using fiber bragg grating demodulation devices,the stress and strain date in the diaphragm wall can be visually real-time displayed,which provides the real-time diaphragm wall deformation information for construction workers. This paper proposes the use of fiber bragg grating sensors monitoring programs and related steps,it can be transformed into engineering applications and have a guiding significance of super deep diaphragm wall structure stress analysis.