桥基位移对桥梁结构的影响及限值研究

从桥梁结构安全角度出发,通过解析法分析了因深基坑施工引起的桥梁基础沉降和横向位移对桥梁结构的影响,求解了因桥基位移造成的桥梁结构附加弯矩和附加应力,并提出了深基坑施工时桥基沉降和横向位移的容许值。分析结果可为基坑施工时对桥梁的实时监控和预警提供理论依据。

Study on Influence of Bridge Foundation Displacement on Bridge Structure and Its Allowable Value

From the perspective of bridge structure safety,the influence of bridge foundation settlement and lateral displacement caused by the construction of deep foundation pit on the bridge structure is analyzed through an analytical method.The additional bending moment and additional stress of bridge structure caused by the bridge foundation displacement are solved.The allowable values of bridge foundation settlement and lateral displacement are proposed in the construction of deep foundation pit.The analysis results can provide the theoretical basis for the real-time monitoring and early warning of the bridge in the construction of foundation pit.