龙门石窟岩体裂隙防渗注浆机制及参数分析  

IMPERMEABLE GROUTING MECHANISM AND PARAMETER ANALYSIS OF FRACTURE ROCK IN LONGMEN GROTTOES

作　　者：刘祥友 翟国林 方云[2] 范子龙 

机构地区：[1]重庆南江建设工程公司,重庆401147 [2]中国地质大学工程学院,湖北武汉430074 [3]龙门石窟研究院,河南洛阳471000

出　　处：《岩石力学与工程学报》2014年第A02期3941-3947,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(40972183)

摘　　要：结合岩体裂隙注浆理论,通过裂隙调查,采用低碱复合注浆料,进行现场岩体裂隙注浆试验研究,分析龙门石窟岩体裂隙注浆机制,提出较适合的龙门石窟裂隙注浆工艺流程和相关施工技术参数。根据注浆试验结果分析,此次复合注浆料浆液属于宾汉流体,在低压注浆情况下,其在岩体裂隙中的运动状态为层流。分析现场注浆裂隙张开度,得出最小可灌裂隙宽度特征值为0.5 mm。试验效果检测表明:裂隙张开度与水灰比之间近似呈反比例关系;当裂隙张开度小于最小可灌裂隙宽度特征值时,即使水灰比很大也无法注浆;同时发现,注浆压力和时间对试验孔注浆量都有明显的影响。Combined with rock fracture grouting theory,through the investigation of rock fissure,the adoption of low alkali compound injection slurry,on-site rock fracture grouting test and analysis of Longmen grottoes rock fracture grouting mechanism, the Longmen grottoes fissure grouting process parameters and construction technology were put forward. According to the grouting test result analysis,pulp slurry belongs to Bingham fluid,under the condition of low pressure grouting,grout in rock fracture movement status to laminar flow. Analysis field grouting cracks opening,minimum irrigation crack width characteristic value of alpha is 0.5 mm. Test results show that the crack width and water-cement ratio approximate assumes the inverse proportion relationship. When fracture opening width less than the minimum fracture width characteristic value of alpha,even though the water cement ratio is very big,grouting is also impossible. The grouting pressure and time has a significant impact of the test hole grouting volume.

关 键 词：岩石力学 龙门石窟 岩体裂隙 注浆试验 注浆理论 效果检测 

分 类 号：TU45[建筑科学—岩土工程]