大跨径连续刚构桥0号块支架计算分析及预压试验

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中图分类号：U446；TQ178文献标志码：A

文章编号：1001-5922（2026）03-0834-05

Calculation analysis and preloading test of No. O block support for long-span continuous rigid frame bridge

YUAN Shengtao，XUE Mingxin，PAN Tao，YOU Pengsheng，FANG Ruitao，NIAN Yong，RUAN Tao （Yunnan Tongqu engineering testing Co. ，Ltd. ，Kunming 650O41，China）

Abstract：Thedesign and preloading testof the No.O block support for continuous rigid frame bridges are related to the construction progress，safety and quality of the entire bridge.Based on a continuous rigid frame bridge （ 100+ （204 180+100 ）adopting the cantilever hanging basket construction method，the scheme design of the No.O block support was cariedout.The special large-scale bridge software Midas Civil wasused to establish the spatial finite element model of the support，and the force situation ofeach componentof the support was analyzed.The results show thatthe stiffess，strength and stabilityof eachcomponentof theNo.O block support allmet the specificationrequirements；the preloading testof the support was caried outbyself-balanced hydraulic jacks.Theanalysis and research on the monitoring results foundthat themaximum displacement of the double-spliced I-steel 4Oa crossbeam occurs at the mid-span position，and its maximum displacement is 8.2mm ，which is less than the theoretical calculation value of 8.4mm and meets the specification requirements； thus，the feasibility of the scheme design of the No.O block support is determined，which can provide a reference forthe force analysis and calculation of similar engineering structures.

Key words：continuous rigid frame bridge;No.O block support;scheme design ;finite element analysis;preloading test

桥梁作为跨越山川河谷、江河湖泊等不良地质环境便于交通运输的重要结构，其中连续刚构桥以其施工快速，连续性好、经济合理等优势，在公路及铁路领域得到广泛使用[]

为了评定大跨连续刚构桥0号块支架在桥梁施工期间其承载力是否满足要求，根据受力原理，对支架进行计算分析及预压试验，支架的设计分析在各领域已取得一定成果。（剩余5421字）