垭坝大桥应急抢险临时支撑及加固技术研究

Research on Emergency Rescue Temporary Support and Reinforcement Technology of Yaba Bridge

依据垭坝大桥发生的险情,结合桥址位于低山侵蚀沟谷大起伏基岩区特殊的地理位置,对其险情发生诱因及造成的病害进行详细调查与研究。通过研究比选,结合抢险工程的特点,因地制宜制定适用于垭坝大桥应急抢险工程的临时支撑方案,详细介绍了集束支架和大钢管架临时支撑设计、施工及监测。根据病害分别采用临时支撑、拆除重建和空间复位等加固措施。

Based on the dangers of the Yaba Bridge,detailed investigations and studies on the causes of the dangers and the diseases are carried out combined with the special geographical location of the bridge site in the large undulating bedrock area of low mountain eroded valleys.Through research,comparison and selection,combined with the characteristics of emergency rescue projects,the temporary support plan,maintenance and reinforcement plan suitable for the emergency rescue project of the Yaba Bridge are formulated according to local conditions.Authors introduced temporary support with bundles support and large steel pipe support,including design,construction and monitorng.Then reinforce measures are adopted such as temportary support,demolition and reconstruction as well as spatial transformation.