IMPERMEABLE GROUTING MECHANISM AND PARAMETER ANALYSIS OF FRACTURE ROCK IN LONGMEN GROTTOES
LIU Xiangyou1，ZHAI Guolin2，FANG Yun2，FAN Zilong3
(1. Chongqing South River Construction Engineering Company，Chongqing 401147，China；2. Faculty of Engineering， China University of Geosciences，Wuhan，Hubei 430074，China；3. Longmen Grottoes Research Institute， Luoyang，Henan 471000，China)
Abstract：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.
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2014, Vol. 33 
