在桥梁水中钻孔桩基础施工中,必须设置钻孔平台,之江大桥主桥位于钱塘江强涌潮区域且水深度较大,在桩基施工阶段需要稳定的施工平台。根据现场实际情况,此平台采用了钢管桩与钢护筒组合的支撑平台,度过了在施工过程中的多次泄洪和强涌潮,起到了安全且经济的良好效果,重点介绍钻孔平台的构造、受力验算、施工工艺及施工要点等。 In the construction of bored pile foundation in bridge water, a drilling platform must be set up. The main bridge of Zhijiang Bridge is located in the strong gully area of ​​Qiantang River with a large water depth, and a stable construction platform is needed during pile foundation construction. According to the actual situation in the field, this platform adopts the support platform combined with steel pipe pile and steel casing, and has passed many flood discharge and strong tidal wave during the construction process, which has played a safe and economical good effect, and mainly introduces drilling Platform structure, force checking, construction techniques and construction points and so on.