广州市某立交桥梁险情成因分析及对策研究

Causes Analysis on Some Viaduct Dangerous Situation in Guangzhou & Its Countermeasures

2021年5月22日,广州轨道交通L11某站及广州市环城综合管廊某工作井施工监测数据显示,相邻一城市立交桥桥墩突发急剧沉降与倾斜;并发生多处桥墩环向贯通裂缝、墩身混凝土碎裂、支座脱空及变形等损害。通过研究险情,初步分析了事故原因,为桥梁管理养护单位提供科学处置依据。险情发生后,收集桥梁及周边轨道交通基坑、管廊基坑相关资料,包括设计图纸、地质资料、施工进度、施工监测数据等;分析数据,找到险情发生与施工间的关联性,找出险情发生的原因;将理论计算得到的桥梁破坏模式与现场实际病害比对,提出了处置建议。

On May 22, 2021, the construction monitoring data of some station of Guangzhou Rail Transit L11 & some working well of Guangzhou utility tunnel around the city showed that the pier of an adjacent urban viaduct suddenly settled and inclined sharply;and there were many damages such as circumferential through cracks of piers, concrete fragmentation of pier shafts, bearing void & deformation. Through the study of the dangerous situation, the cause of the accident is preliminarily analyzed, which provides a scientific basis for the management and maintenance unit of the bridge. After the danger occurs, collect relevant data of bridge and surrounding rail transit foundation pit, pipe gallery foundation pit, including design drawings, geological data, construction progress, construction monitoring data, etc.;analyze the data, find out the correlation between the occurrence of the dangerous situation and the construction, and find out the cause of the dangerous situation. The bridge damage mode calculated theoretically is compared with the actual disease on site, and the disposal suggestions are put forward.