河沟

• And results are : ( 1 ) analyze the force and distortion on pipeline under collapse and gulch in theory . on the base of beam deformation , analyze the bending moment and deformation of pipeline with frusta and without frusta . calculate a true problem , contrast the differences between pipeline with frusta and one without frusta , draw some conclusions
  得到的主要结果为： ( 1 )基于弹性地基理论和弹性梁的挠曲线理论，给出了管道在固定墩(相当跨越河沟情况)和无固定墩(相当坍塌和冲沟情况)的变形微分方程，并分析了当量轴力为拉力或压力时管道的变形和受力情况。