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介绍了石太下行线K224+861(1～4+1～16+1～4)张家巷框构桥的框构原设计概况。针对原设计存在加固和拆除受地形限制、施工场地狭小、施工场地无原材料和周转料的堆放场地的困难,提出了原设计方案施工难题。在地形困难的条件下,优化设计方案,制定施工方案及措施。具体方案有设置路基防护桩、双排后背桩带斜支撑、严格控制顶进质量、搭设工作平台。方案实施后,保质、保量地完成了高填方路基的线路加固及顶进施工,圆满完成了任务。
The original design of frame structure of Zhangjiaxiang frame bridge with K224 + 861 (1 ~ 4 + 1 ~ 16 + 1 ~ 4) on Shitai downstream line is introduced. In view of the difficulties in the original design such as the reinforcement and demolition of terrain, the narrow construction site, the storage of raw materials and working materials in the construction site, the construction design of the original design was put forward. In the difficult terrain conditions, optimize the design, development of construction programs and measures. Specific programs have set up embankment protection, double back piles with oblique support, strict control of jacking quality, erection of work platforms. After the implementation of the program, the line reinforcement and jacking construction of high-fill subgrade were completed on a quality-assured basis and the project was completed satisfactorily.