Abstract: The connecting passage of the foundation pit is constructed under the existing optical fiber cables of Greeland Center. The excessive settlement caused by optical fiber cables should be avoided during the construction, which may lead to unfavorable effects. Through finite element modeling and expert discussion, the pipe roofing method is finally adopted for supporting the surrounding soils, and then the connecting passage under optical fiber cables is constructed. Through the field monitoring, the largest settlement of soil is 12 mm, which conforms to the deformation control standards of the optical fiber cable, and the normal use of the existing optical fiber cables is ensured. The pipe roofing construction technology used in the project may provide a good reference for similar projects.