基坑立柱桩光纤应力应变监测分析

Fiber Optic Strain Monitoring Analysis for Column Piles of Excavation

光纤传感技术已日趋成熟,在基坑监测领域得到了广泛应用。结合上海轨道交通18号线长江南路站基坑工程,介绍了立柱桩的应力、应变监测过程,分析了立柱桩在基坑工程施工期间的应力、应变变化规律,为软土地层基坑支护体系的设计提供有效的量化依据,从设计源头上确保基坑工程的安全。

Fiber optic sensing technology has been increasingly mature and widely used in excavation monitoring.Combined with the excavation project of Changjiang South Road Station of Shanghai Rail Transit Line 18,the strain monitoring process of column piles is introduced.And the change laws of strain and stress of column piles during the excavation construction are analyzed,which provides an effective quantitative basis for the design of excavation support system in soft ground and ensures the safety of excavation project from design.