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宝兰客专某道岔连续梁为单箱单室斜腹板等截面箱梁结构,其中顶板和底板通长束钢绞线长度达195.02m。如何保证道岔梁超长预应力束施工质量是确保梁体及运营安全的重中之中。本文结合现场实际情况,通过对施工准备、施工工艺及质量控制技术措施等方面入手,成功解决了高速铁路现浇道岔连续梁超长预应力束的孔道预留、穿束、张拉、压浆等技术难题,并确保了施工质量。
The continuous beams of a turnout in Baolan Passenger Dedicated Railway are single-box single-chamber inclined webs and other cross-section box girder structures, in which the length of the long strand strand of the roof and the floor slab reaches 195.02m. How to ensure the construction quality of the long-span prestressed beam of the turnout beam is the most important task to ensure the safety of the beam body and the operation. Based on the actual situation in the field, through the preparation of construction, construction technology and quality control measures and other aspects of the start, successfully solved the high speed railway cast-in-situ continuous beam prestressed beam of prestressed beam reserve, penetration, tensioning, grouting technology Problems and ensure the quality of construction.