【摘要】 水电站地下埋藏式钢岔管承载能力是工程设计中非常重要的一个内容,但目前对于钢岔管与围岩联合承载的机理还缺乏系统深入的研究。本文结合某抽水蓄能电站的工程实际,按照钢衬与围岩联合承载的原理,用三维非线性有限元对埋藏式钢岔管进行了计算分析。计算结果表明:在钢衬与围岩共同承受内水压力时,围岩发挥了重要作用,围岩的性能越好,所分担的内水压力就越大,因此在埋深足够的情况下,应充分利用围岩进行分载,以减小钢衬厚度,从而节约工程投资。更多还原

【Abstract】 Bearing capacity of underground bifurcation inuhydropower station is of great importance.A further study is required about the combining effect of bifurcation and surrounding rock on bearing capacity.The authors conducted a computation with a 3D nonlinear finite element model for a pumped storage power station,taking into consideration of the combining effects of surrounding rock mass and steel lining.The results showed that the surrounding rock of steel bifurcation took an important role under the action of internal water pressure.The better the properties of the rock were,the bigger its bearing capacity would be.When the embedding depth of bifurcations was large enough,the surrounding rock could be considered in full play and the thickness of steel bifurcation could be reduced.更多还原