论文部分内容阅读
受厂区铁路站场的制约,某电厂地下输煤隧道采用浅埋暗挖法下穿既有铁路专用线。根据不同埋深和现场条件,输煤道设计采用不同结构型式。为确保洞顶铁路正常运营和施工安全,设计采用大管棚加小导管超前支护、双侧壁导坑法开挖、D24定型便梁加固铁路等措施,并针对性提出铁路专项监控和施工方案。基于输煤隧道施工允许的地表最大沉降量控制要求,通过FLAC3D有限差分软件对施工设计方案进行了模拟分析,结果证明能够满足沉降控制要求。可为类似工程设计、施工借鉴。
Constrained by the factory railway station, a power plant underground coal tunnel using shallow buried undercutting through the existing railway line. According to different depths and site conditions, the design of coal conveying roads adopts different types of structures. In order to ensure the normal operation and construction safety of the tunnel-top railway, measures such as large pipe shed plus small pipe advance support, double-wall pilot excavation and D24 fixed beam to reinforce the railway are designed and the special railway monitoring and construction are proposed Program. Based on the control of the maximum allowable surface subsidence in coal tunnel construction, the FLAC3D finite difference software was used to simulate the construction design and the results proved that it can meet the requirements of subsidence control. For similar engineering design, construction reference.