污水厂氧化沟基桩倾斜原因分析及加固处理

Reason Analysis and Reinforcement Treatment of Inclined Pile in Oxidation Ditch of WWTP

某污水处理厂氧化沟桩基施工结束后,在氧化沟北侧进行了管道开挖施工。因管道施工未对原氧化沟基桩采取保护措施,在氧化沟区域开挖至设计标高时,发现桩基部分区域桩头发生了倾斜。由于目前基桩倾斜加固处理缺乏相关的工程经验和理论,在处理时较为复杂。结合实际工程,利用传统计算与有限元软件Abaqus建立桩土模型对基桩倾斜进行了损伤分析与研究,最终确定对偏位较小基桩进行灌芯加固,对偏位较大基桩采用树根桩进行补桩处理。经检测证明,处理后的桩基符合设计要求,同时氧化沟后期运行监测结果良好,为今后类似工程问题的处理提供了参考及理论依据。

After the completion of pile foundation construction of oxidation ditch in a WWTP, pipeline excavation was carried out on the north side of the oxidation ditch. Since there was no protective measure for pile foundation in pipeline construction, the pile foundation was inclined when the oxidation ditch area was excavated to design elevation. Due to the lack of relevant construction experience and theory for reinforcement of the inclined pile, it was more complicated to deal with pile inclination situation. In this paper, the traditional calculation and finite element software damage of pile slope. It was finally determined that the small offset Abaqus were both used to analyze the pile was reinforced with core, and the large deviation pile was treated with root pile. The test results showed that the treated pile foundation could meet the design requirements, and the monitoring results of the later operation of the oxidation ditch were good. It could provide reference and theoretical research basis for similar project problems in the future.