裸岩条件下现浇梁超高现浇支架施工技术

Construction Technology of Super-high Support of Cast-in-place Beam in Bare Rock

以重庆市轨道交通9号线嘉陵江嘉华轨道专用桥的超高支架为研究对象,结合现场实际情况,采取岩层取芯成孔的方法施工水下锚固桩支架基础,适当增大超高现浇支架的高宽比,通过计算和现场组织施工,使支架可靠地将上部结构的荷载传至桩基础,同时抵抗了较大的水流力,提高了支架的施工安全性能,效果显著,可为同类桥梁的施工提供一定参考。

The super-high support of Jialing River Jiahua Track Bridge of Chongqing Rail Transit Line 9 is researched.Combined with the actual situation on site,the foundation of the underwater anchor pile support is constructed by the core drilling in rock layer and the height-width ratio of the super-high cast-in-place support is increased appropriately.Through calculation and reasonable site construction,the support can reliably transfer the load of the upper structure to the pile foundation and resist the large flow force.The construction safety is obviously improved.It can provide reference for construction of similar bridges.