采用分布式光纤传感技术对赫章特大桥195 m主墩下的大直径嵌岩桩承载特性进行了系统的研究分析。首先采用室内模型试验验证了光纤技术在桩基测试中应用的可行性;然后通过现场埋设和施工过程中的数据采集、整理与分析,系统研究了大直径嵌岩桩的承载特性及其荷载传递机制;依托工程的实测变形量进一步证明了光纤测试技术的可行性和正确性。基于全分布式光纤传感技术的研究结果对大直径嵌岩桩理论及其工程应用具有参考价值,同时对光纤测试技术在桩基测试中的应用具有借鉴作用。 The distributed optical fiber sensing technology was used to study the bearing characteristics of large diameter rock-socketed piles under 195 m main pier of Hezhang Bridge. Firstly, indoor model test is used to verify the feasibility of optical fiber technology in pile foundation test. Then, the data collection, collation and analysis of the embedded and construction process are carried out. The load-bearing characteristics and load transfer of large diameter rock-socketed pile Mechanism; relying on the measured deformation of the project to further prove the feasibility and accuracy of optical fiber testing technology. The research results based on the distributed optical fiber sensing technology have reference value for the theory and engineering application of large diameter rock-fill pile, and can be used as a reference for the application of optical fiber testing technology in pile foundation testing.