堆石坝坝基廊道应力分析

以某水电站工程为例,采用二维有限元模型从廊道的布置、体型、廊道与防渗墙的接头形形式式和覆盖层的厚度对廊道应力的影响进行了简单的计算分析。经计算得出廊道布置在坝基面以上时其应力较小,在确定廊道的体型时,应该尽量避免结构的突变性,减少应力集中现象。在选择廊道与防渗墙的接头形式时,也应尽量避免其突变性,应该根据实际情况综合考虑选择软接头或刚性连接。覆盖层越深厚,相应结构的应力就越大。

Stress Analysis of Gallery in Rockfill Dam

Based on a hydropower station, analysis has been made on the arrangement and the body of the gallery, the connection type between the gallery and the cutoff wall, and the influence of covering layer thickness on the stress of gallery, which was applied with two dimensional finite element models. After calculation, the stress of gallery was lesser when the gallery was arranged in the dam foundation above. In determining the size of the gallery, structural change should be avoided to reduce the stress concentration phenomenon. When selecting the type of joint of the corridor and the cutoff wall, structural change should be avoided as far as possible. Based on the actual situation, soft or rigid connection can be chosen. The thichker the cover is, the greater the stress of the structure is.