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从煤矿采空区高压线塔基础的破坏机理分析出发,运用采动沉陷学、地基基础工程和结构力学等理论,推导出在不同塌陷情况及不同大风和覆冰条件下,地基塌陷下的高压线塔井字梁基础悬空时的容许悬空长度(塌陷面积比)的计算式。研究表明:当地基塌陷使井字梁基础一边悬空时,最不利工况为90°大风,井字梁基础容许悬空的面积最大;当地基塌陷使井字梁基础一角悬空时,最不利工况也为90°大风,井字梁基础容许悬空的面积最大。依据理论计算部分所得出的最大容许悬空面积比,使用ANSYS有限元软件模拟了地基塌陷使井字梁基础一边悬空和一角悬空两种塌陷情况下,地基不同悬空比例对井字梁基础所产生的应力及竖向地基反力。
Based on the analysis of the failure mechanism of high voltage tower foundation in the goaf of coal mines, the theory of mining subsidence, foundation foundation engineering and structural mechanics is used to derive the high voltage tower under subsidence and collapse under different conditions of gale and icing. Calculation formula of allowable dangling length (collapse area ratio) when dash beam foundation is suspended. The results show that when the foundation collapse causes the one side of the well beam to hang, the most unfavorable condition is 90 ° gale, and the maximum allowable dangling area is the foundation beam foundation. When the foundation collapse causes the corners of the well beam to dangle, the most unfavorable condition It is also 90 ° windy, with the largest area allowed for dangling. Based on the maximum allowable dangling area ratio obtained from the theoretical calculation part, ANSYS finite element software is used to simulate the effect of different dangling ratios of the ground foundation on the foundation of the cross-beam foundation under the condition of the foundation collapse being suspended and the corner suspended. Stress and vertical ground reaction.