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基于Winkler弹性地基梁理论,分析地下管线在地铁开挖作用下的受力情况,推导考虑硬化地基扩散作用因素影响的地下管线位移表达式、转角表达式、弯矩表达式和剪力表达式,并定量分析地下管线变形与地基扩散角、埋深等因素间的关系。理论分析表明:地下管线的最大位移在沉陷区的中间,最大弯矩和最大剪力发生在沉陷区的边缘;地基扩散角与管线的埋深对管线的最大沉降量有较大影响。分析结果为工程实践中确定管线的加固位置提供了理论依据。
Based on the Winkler elastic foundation beam theory, the displacement of underground pipeline under subway excavation is analyzed. The displacement expression, corner expression, bending moment expression and shear force expression of underground pipeline under the influence of diffusion of hardened ground are deduced. And quantitative analysis of the relationship between underground pipe deformation and foundation diffusion angle, depth and other factors. The theoretical analysis shows that the maximum displacement of underground pipeline is in the middle of the subsidence area, and the maximum bending moment and maximum shear force occur at the edge of the subsidence area. The diffusion angle of foundation and the depth of pipeline have a great influence on the maximum settlement of pipeline. The analysis results provide the theoretical basis for determining the reinforcement position of pipeline in engineering practice.