介绍了一种利用BOTDA分布式光纤传感技术,监测地下连续墙在基坑开挖过程中受力变形过程的方法。通过在地下连续墙钢筋和H型钢上布设分布式光纤传感器,使之能够在基坑开挖过程中自动获取桩身的应变、弯矩、挠度等数据;采用双线的测量方法,具有温度自补偿的能力。 A method of using BOTDA distributed optical fiber sensing technology to monitor the deformation process of underground continuous wall in excavation of foundation pit is introduced. By distributing distributed optical fiber sensors on the diaphragm wall and the H-section of the diaphragm wall, it can automatically obtain the strain, bending moment and deflection of the pile body during the excavation of the foundation pit. The double-wire measurement method has the advantages of temperature Ability to compensate.