月亮山隧道圍巖變形規(guī)律及穩(wěn)定性
[Abstract]:During tunnel excavation, controlling the deformation of surrounding rock is an important guarantee for engineering safety. Taking Yueliangshan tunnel in Hubei province as an example, three typical tunnel cross-section data are selected to study the deformation of surrounding rock, and the curve of deformation-time relation of surrounding rock is obtained. By using the least square method and the nlinfit function method to deal with the measured data, the comparative analysis of the fitting degree under the two regression analysis methods is obtained, and a simpler calculation method and a more suitable regression equation for the tunnel are found. The time when convergence tends to be stable and the total deformation amount are predicted, and the reserved deformation amount is determined, which provides a reasonable supporting opportunity for the secondary lining. At the same time, the space effect of tunnel construction is analyzed by using FLAC3D three-dimensional finite element software, and the stability distance of surrounding rock deformation is obtained. Finally, the stability of surrounding rock of tunnel is evaluated, and the corresponding treatment suggestions are given, which has important guiding significance for the design, modification and construction of tunnel.
【作者單位】: 中國(guó)礦業(yè)大學(xué)(北京)力學(xué)與建筑工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(U1361210) 中央高;究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(2009QL11)資助
【分類號(hào)】:U451.2
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