The Calculation of Grouting Diffusion Radius on Based Bingham Fluid for Chunnel That Passes through Fractured Rock Mass

Abstract:

To conduct pro-grouting design and make the prediction of the result of grouting about the chunnel that passes through fractured rock mass, the essay adopts following theoretical formula to calculate the fractured rock mass grouting diffusion radius: Wittke and Wallner Formula、Lombadi Formula and Huang Chunhua Formula. Finally through the analysis of calculation results can conclude: (I) The diffusion radius of the slurry can meet the design requirements under the condition of 3-4 Mpa designed grouting pressure、5 cm grouting holes’ radius and 1800-3600s grouting time. (II) The calculation result of Huang Chunhua Formula is almost the same as Wittke and Wallner Formula and Lombadi Formula, but the margin of grouting diffusion radius’ change as grouting time and grouting pressure growing are different, it’s more close to the real situation.(III) The calculation of these theoretical formula only consider the breadth of fractured rock without considering the variation of its thickness and direction. So all of the calculation results of these formula are generally bigger than the standard.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 1280-1286
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.1280
• Online since: December 2012
• Authors: Lei Wang, Tao Li
• Keywords: Bingham Fluid, Chunnel, Fractured Rock Mass, Grouting Diffusion Radius

References

[1] Wang Lei, Li Tao. Harbour Crossing pre-grouting reinforcement effect of inspection and evaluation [J]. Railway Standard Design,2010.12:83 -88.

[2] Qu Qing, Quan-Sheng Wang, Wen-Qiang Zhang. Jiaozhou Bay seabed tunnels advanced geological prediction and grouting program selection [J]. Railway Engineering Society, 2009 (9) :64-68.

[3] Kwong Kin political, Zan month stability. Geotechnical Grouting Theory and Engineering instance [M] Beijing: Science Press, 2001.

[4] Hao Zhe rock grouting theoretical and [M] Beijing: Geological Publishing House, 2006.

[5] Huang Chunhua fissure grouting Bingham fluid diffusion capacity [J]. Water Resources and Hydropower, 1997, (2): 13-17.