山区公路桥梁桥墩受落石撞击后应急及加固方案探讨  

A Discussion on Emergency and Reinforcement Schemes for Mountainous Highway Bridge Piers Subjected to Rockfall Impacts

作　　者：杨茂德 张雨箫 YANG Maode;ZHANG Yuxiao(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2025年第1期118-122,共5页Technology of Highway and Transport

摘　　要：通过分析近年来桥墩受撞击及后续应急加固处理的案例,探讨了山区公路桥梁桥墩受落石撞击的原因,提出了应急、加固两阶段的理论,并总结出针对不同破坏情况的处理策略。1)墩柱受剪破坏后宜采用临时支墩和外包混凝土结构应急方案;2)地面以下桩基断裂宜采用接桩处理;3)结构裂缝可采用裂缝修补技术修补;4)预制梁墩顶现浇段宜采用体系转换方案加固;5)仅存在裂缝病害的构件采用加大截面和外包钢板方案。工程案例加固处治表明,根据现场情况,采用以上相应处理措施,桥墩受撞击后仍可通过加固处治重新投入使用。This paper examines recent cases of pier impacts and subsequent emergency reinforcement,exploring the causes of such impacts by falling rocks on mountainous road bridges.It proposes a two-stage theoretical framework—emergency and reinforcement—and summarizes strategies for addressing varying degrees of damage:1)For shear failure of pier columns,temporary piers and external concrete structures are recommended for emergency treatment;2)Broken pile foundations below ground level should be addressed by pile splicing.3)Structural cracks can be repaired using crack repair techniques;4)The cast-in-place section at the top of the pier for prefabricated beams should be reinforced by system conversion;5)Components with only crack diseases are treated by increasing the cross-sectional area and external steel plate reinforcement.These case studies have indicated that,contingent upon the specific onsite circumstances and the implementation of the aforementioned corresponding remedial measures,bridge piers can still be rehabilitated and reintroduced into service following impact incidents.

关 键 词：山区 桥墩落石撞击 应急 加固 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]