绿地中心既有光缆下基坑连通道施工技术

Construction technology for connecting passage of foundation pit under existing optical fiber cables of Greeland Center

本工程在既有光缆下施工基坑连通道,施工时要避免光缆产生过大的沉降造成不利影响。通过有限元模拟和专家论证,最终确定采用管幕技术对通道周围土体先行支护,再施工既有光缆下的连通道。经现场监测土体最大沉降为12 mm,符合光缆变形控制标准,确保了既有光缆的正常使用。该工程运用的管幕连通道施工技术可为类似工程提供良好的借鉴。

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.