为解决传统的位移监测技术多为点式，易出现漏检等问题，基于布里渊光频域分析（BOFDA）技术，进行地下连续墙变形现场监测的方法与技术研究，给出依据分布式光纤监测的应变数据换算地下连续墙变形的计算方法，并采用传感光缆直埋入地连墙的布设方式对墙体进行分布式、精细化的监测。将该技术和施工方法应用于软土地区某基坑工程进行验证，结果表明： BOFDA技术能够很好地反映墙体变形的发展过程，开挖深度大，地连墙最大应变位置发生下移，应变数据经过计算后将得到地连墙分布式的位移数据。

The traditional displacement monitoring technology is mostly point type and prone to miss detection. Therefore, the Brillouin optical frequency domain analysis (BOFDA) method is adopted to conduct field monitoring on deformation of underground diaphragm wall. The calculation method of converting diaphragm wall deformation according to the strain data of distributed optical fiber monitoring is given, and the sensing optical cable is directly buried in the diaphragm wall to monitor the wall in a distributed and fine manner. The technology and construction method are applied to a foundation pit in soft soil area. The results show that: (1) the BOFDA technology can well reflect the development process of wall deformation; (2) with the increase in excavation depth, the maximum strain position of diaphragm wall moves downward; (3) after calculating the strain data, the distributed displacement data of diaphragm wall can be obtained.