固结灌浆对抽水蓄能电站围岩分担率的影响  

Effects of High-Pressure Consolidation Grouting on Sharing Ratio of Internal Pressure in Bedrock at Pumped Storage Power Station

作　　者：柴建峰 马传宝 杨雷 梁宁[3] 

机构地区：[1]国网新源控股有限公司技术中心,北京100161 [2]安徽绩溪抽水蓄能有限公司,安徽宣城245300 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《人民黄河》2018年第2期98-100,139,共4页Yellow River

基　　金：国网新源公司科研基金资助项目(JXKY201503)

摘　　要：结合已建抽蓄电站引水压力管道变形监测资料,通过计算,探讨围岩抗力系数对围岩分担率的影响。研究结果表明:(1)不同内水压力作用下,围岩抗力系数的变化对钢衬变形和应力影响均不显著,敏感性低,这一现象不仅与钢衬的变形量过小、影响和波及范围有限有关,还与围岩弹性模量较大有关;(2)随着围岩抗力系数的增大,钢衬的环向应力和径向位移变化甚微,围岩分担率也无明显变化;(3)对于不存在明显地质缺陷的Ⅲ、Ⅳ类围岩,试图通过固结灌浆提高围岩分担率可能不会得到明显效果,必要性很小。Based on the study of monitoring data of constructed pumped storage pow-er stations, the article adopted the numerical simulation software to analyze how- the rock resistant coefficient affected the stress and defor^ nation of penstock. The results indicate that a ） under the high internal water pressure, the rock resistant coefficient of surrounding rock has not obvious effect on the penstock, because the deformation of steel penstock is small and the elasticity modulus of surrounding rock is relatively larger; b ） the value of circumferential stress and deform-ation do not clearly change wdth the increase of the rock resistant coefficient and the rock resistant coefficient is not an remarkable factor influ-encing the sharing ratio of internal pressure in bedrock; c ） there is no need to apply high-pressure consolidation grouting, according to nor-mal n and W surrounding rock without faults, dikes, unloading crack intensive belt, deep unloading belt and developed joint fissures.

关 键 词：地下埋管 围岩分担率 高压固结灌浆 抽水蓄能电站 

分 类 号：P338[天文地球—水文科学]