无盖重固结灌浆在向家坝北干渠引水隧洞施工中的应用  

Application of unconcealed consolidation grouting in the construction of diversion tunnel of Xiangjiaba north main canal

作　　者：晏攀 YAN Pan(Yangtze Three Gorges Technology and Economic Development Co.,Ltd,Yibin 644612,China)

机构地区：[1]长江三峡技术经济发展有限公司,四川宜宾644612

出　　处：《中国高新科技》2020年第18期51-53,共3页

摘　　要：向家坝水电站北干梁取水隧洞工程工期紧、任务重,为降低团结灌浆施工高峰强度,在导流隧洞内选择有代表性的围岩段进行了无盖重固结灌浆试验。试验采用“全孔一次性灌浆法”“孔口阻塞,孔内循环”的灌浆方式,灌后的声波测试和压水试验检查结果表明:灌浆效果良好,灌浆后岩体质量能满足设计要求。文章详细介绍了试验方案、试验成果、工艺流程,其经验可供类似工程参考。The north canal intake tunnel projeet of Xiangjiaba hydropower station is a tight task.In order to reduce the peak intensity of consolidation grouting,the representative surrounding rock section of the diversion tunnel was selected to carry out the heavy consolidation grouting test.The grouting method of"whole one-time grouting method"and"hole opening blocking,hole circulation"are adopted in the test.The results of acoustic wave test and water pressure test after irigation show that the grouting efect is good,the quality of rock mass after grouting can meet the design requirements.The test scheme,test results and process flow are introduced in detail,which can be used as reference of similar projects.

关 键 词：引水隧洞 无盖重 固结灌浆 向家坝水电站北干梁 

分 类 号：U45[建筑科学—桥梁与隧道工程]