水库水位变化对临近桥梁岸坡的影响分析  

Analysis of the Influence of the Reservoir Water Level Change on the Bank Slope of an Adjacent Highway Bridge

作　　者：赵守良 刘品[1] ZHAO Shouliang;LIU Pin(Guizhou Transportation Planning and Design Academe Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081

出　　处：《交通科技》2022年第2期56-60,共5页Transportation Science & Technology

摘　　要：以某高速公路桥梁岸坡为例,采用地质调绘、钻探等工程手段,分析桥区水库水位波动情况下的岸坡破坏模式。对于库水位骤降工况,通过合理的假设,提出一种简易的极限平衡计算方法。依据相关规范规程要求,对不同工况下的桥梁岸坡稳定性采用极限平衡简化Bishop法进行分析计算,得出最不利工况为水位骤降工况。采用有限元数值模拟方法对计算结果进行对比论证,结果显示2种计算方法得出的结果基本一致,表明分析结果真实可靠。Taking the bank slope of an expressway bridge as the research object, the bank slope failure mode under the condition of the fluctuation of the reservoir water level in the bridge area is analyzed by using engineering methods such as geological mapping, drilling, etc. With reasonable assumptions for the sudden drop of the reservoir water level, a simple limit equilibrium calculation method is proposed. According to the requirements of relevant codes and regulations, firstly, the limit equilibrium simplified Bishop method is used to analyze and calculate the bridge bank slope stability under different working conditions, and it is concluded that the most unfavorable working condition is the sudden drop of water level. Secondly, the finite element numerical simulation method is used to compare and demonstrate the calculation results. The results show that the results obtained by the two calculation methods are basically the same, indicating that the analysis results are true and reliable.

关 键 词：桥梁岸坡 库水位骤降 极限平衡法 数值模拟 

分 类 号：U443.1[建筑科学—桥梁与隧道工程]