摘要
巴河流域洪水主要由暴雨形成,陡涨陡落,峰高量大,施工期间水位涨落高达10 m,如何合理地确定跨越巴河大型桥梁基础临时结构总体设计指标较为困难。为此,结合巴河特大桥主桥5号墩承台围堰施工,从围堰总体设计、设防水位确定、围堰构造细节设计等多方面进行论述和研究,提出了适用于裸岩倾斜地层、水位陡涨陡落河段一套切实可行锁扣钢管桩围堰总体设计和细部节点构造设计方法。结果表明,该设计方法切合实际,能够更好地指导现场施工,过程中采取优化措施,进一步提高工效,解决了施工难题,对类似河床及水文地质条件锁口钢围堰有一定借鉴作用。
Floods in the Ba River basin are mainly caused by heavy rain,characterized by rapid rise and fall,high peaks and large volumes.During the construction period,the water level can fluctuate by up to 10 meters.It is challenging to reasonably determine the overall design parameters for temporary structures of large bridge foundations across the Ba River.Therefore,combining with the construction of the cofferdam for Pier No.5 of the main bridge of the Ba River Extra-Long Bridge,the overall design of the cofferdam,the determination of the flood control water level,and the detailed structural design of the cofferdam from multiple aspects were discussed and researched.A practical and feasible overall design and detailed node structural design method for interlocking steel pipe pile cofferdams in inclined bedrock strata and river sections with rapid water level fluctuations was proposed.The results show that this design method is practical and can better guide on-site construction.Optimized measures taken during the process further improve work efficiency and solve construction difficulties.A reference is also provided for similar riverbed and hydrogeological conditions for interlocking steel cofferdams.
作者
王佳佳
罗利
罗建勋
WANG Jiajia;LUO Li;LUO Jianxun(China MCC5 Group Corp.Ltd.,Chengdu 610063,China)
出处
《科技和产业》
2025年第24期17-25,共9页
Science Technology and Industry
关键词
钢管桩围堰
裸岩倾斜河床
围堰多因素协同设计
围堰精细化构造设计
steel pipe pile cofferdam
inclined bedrock riverbed
multi-factor collaborative design of cofferdam
refined structural design of cofferdam
