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桥梁工程的兴建离不开承台基坑的开挖,但针对承台基坑的研究却很少。以禹门口黄河大桥12#索塔承台基坑为工程背景,详细介绍了该承台基坑的监测结果及通过监测结果指导施工的过程,分析了该承台基坑施工过程中出现的问题并提出了相应的解决措施。同时,将承台基坑与建筑基坑进行对比,分析了二者的差异性。结果表明:拉森钢板桩既能挡土又能防水,是承台基坑较为理想的支护结构;封底混凝土厚度大,湿养护过程中将对支护结构产生巨大的水平推力,会对结构产生影响,应引起设计人员注意;承台基坑从支护体系到周边环境都与建筑基坑存在较大差异,强行套用建筑基坑的相关技术规程风险大、问题多,应加强专门针对承台基坑的相关研究。
The construction of bridge project can not be separated from the excavation of bearing foundation pit, but there is little research on foundation pit excavation. Taking Yumenkou Yellow River Bridge No. 12 Soda Tower Pile Foundation Pit as the engineering background, the paper introduces the monitoring results of the foundation pit pit and the construction process guided by the monitoring results, and analyzes the problems in the construction process of the pile foundation pit. And put forward the corresponding solutions. At the same time, the foundation pit foundation pit and construction pit comparison, analysis of the difference between the two. The results show that Lacen steel sheet piles can not only retain soil but also waterproof, which is an ideal supporting structure for the foundation pit. The thickness of the backseason concrete is large. During the process of wet curing and retaining, huge horizontal thrust will be generated to the supporting structure, Impact should be caused to the designer’s attention; bearing foundation pit from the support system to the surrounding environment and the construction pit there is a big difference, forcing the relevant technical regulations of the construction pit risk, problems and more should be strengthened specifically for the bearing Research on foundation pit.