深层淤泥区墩柱偏位病害分析及安全评估  

ANALYSIS AND SAFETY EVALUATION OF PIER DISPLACEMENT ISSUES IN DEEP SILT AREAS

作　　者：陈曦 CHEN Xi(Guangdong Heli Traffic Maintenance Technology Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]广东和立交通养护科技有限公司,广州510000

出　　处：《低温建筑技术》2024年第9期96-100,共5页Low Temperature Architecture Technology

摘　　要：为研究在深层淤泥区桥下施工对既有桥梁墩柱及桩基的影响,文中基于工程实例对既有桥梁的病害进行详细分析及安全评估,提出了墩柱偏位的分析方法及评估验算手段。以广东某座桥为背景,由于桥下河堤工程施工致使既有桥梁发生墩柱偏位、支座滑移等病害,基于专检报告数据推导出墩柱偏位及梁体滑移的实际数值,根据推导数据采用Midas Civil软件对偏位墩柱进行验算分析,结果表明7#墩在土压力作用下发生墩柱偏位,桩基抗弯承载能力已经不足,且已经进入弹塑性状态,无法满足安全通行要求,需要进行加固设计。此工程实例可为桥梁墩柱偏位分析提供借鉴和参考。To study the impact of construction beneath bridges in deep silt areas on existing bridge piers and piles,this paper details the damage and safety assessment of an existing bridge based on an engineering case.It introduces methods for analyzing and evaluating pier displacement.Using a bridge in Guangdong as a case study,where construction of a river embankment caused pier displacement and bearing displacement,the paper derives actual values of pier displacement and beam displacement from inspection reports.These values are analyzed using Midas Civil software.Results show that Pier 7#experienced displacement due to soil pressure,with the pile's bending resistance capacity being insufficient and entering an elastic-plastic state,failing to meet safety requirements.Reinforcement design is necessary.This case provides valuable insights and references for analyzing pier displacement in future bridge projects.

关 键 词：墩柱偏位 等效屈服弯矩 深层淤泥区 

分 类 号：TU997[建筑科学—市政工程]