摘要
随着城市化建设的发展,越来越多的深厚软土区域进行填土造陆以便进行城镇化建设。当进行填土造陆的深厚软土区域存在既有桥梁穿越时,后期填土形成的不平衡土压力将导致桩基发生附加变形,桥梁墩柱和桩基内力增大进而可能影响桥梁运营安全。结合实际工程,通过合理选择土层参数、桩土界面单元类型及计算准则,利用数值分析软件模拟不同的填土堆载过程,分析深厚软土区域大面积堆载对邻近桥梁基础偏位的影响,结果表明分层均匀填土工况下墩柱偏位大小及方向主要与最终填土高差有关,不平衡填土工况下墩柱偏位的大小及方向与实际填土过程中的堆、填、挖等顺序密切相关。
In recent years,more and more deep soft soil areas need to be filled to land in order to cooperate with urbanization construction.In the deep soft soil area with bridge spanning,the unbalanced soil pressure formed by the later filling will lead to additional deformation of the pile foundation,and the internal force of the bridge pier and pile foundation will increase,thereby affecting the operation safety of the bridge.Combined with the illustrative examples,through the reasonable selection of soil parameters,pile-soil interface element type and calculation criteria.Numerical analysis software is used to simulate different filling loading processes.The influence of large-area surcharge in deep soft soil area on the deviation of adjacent bridge foundation is analyzed.The conclusion shows that the size and direction of pier column deviation under layered and uniform filling conditions are mainly related to the final filling height difference,and the size and direction of pier column deviation under unbalanced filling conditions are closely related to the sequence of filling,filling and excavation in the actual filling process.
作者
张恒
廖鸿钧
ZHANG Heng;LIAO Hongjun(Foshan Transportation Affairs Center Foshan 528000,China;Guangdong Heli Civil Engineering Co.,Ltd.Guangzhou 511400,China)
出处
《广东土木与建筑》
2022年第11期77-80,共4页
Guangdong Architecture Civil Engineering
关键词
深厚软土
填土
桥梁墩柱
偏位
数值模拟
deep soft soil
land filling
bridge pier column
deviation
numerical simulation
