大型桥梁基础施工对堤防稳定性的影响分析

Effect Analysis of Large-scale Bridge Foundation Construction on Levee Stability

珠海市洪鹤大桥^#3主墩位于既有中珠联围防洪大堤背水侧防护区,桥梁基础施工需在堤防保护区进行筑岛填筑、深基坑开挖。为确保桥梁施工期防洪大堤的安全,针对#3主墩基础施工期间防洪大堤的渗流及整体稳定性进行了分析,并进行了位移和沉降监测。结果显示:桥梁基础施工对大堤稳定性影响较小,大堤不会发生失稳。

The Main Pier ^#3 of Honghe Bridge in Zhuhai locates in the landside protection zone of existing Levee of Zhongshan and Zhujiang. Drilling using artificial island method and deep excavation are required in the protection zone during the construction of bridge foundation. For the sake of safety, both the seepage and overall stability of the levee in the foundation construction of Main Pier #3 were analyzed with the displacement and settlement under monitoring. The result shows that the construction of bridge foundation has minor effect on the stability of levee, hence the levee would not be subject to failure.