Advertisement

Micro-Mechanism of Pressure Variation of Grout in Porous Media Considering Filtration

Conference paper

Abstract

The pressure variation of cement grout is an important issue when it is used to eliminate the standard for grouting at the ending of grouting. To better understand the effects of grouting parameters on the pressure variations considering filtration, a series of laboratory tests were carried out under the condition of different grouting flowrates, water/cement ratios and mass fractal dimensions. After a grouting flowrate was performed on sand samples, the pressures in each measurement point were monitored by transducers. The experimental results show that: (1) the grouting pressure presents a nonlinear decreasing law with the increase of the distance from the grouting hole, whereas the grouting pressure at the same measuring point gradually increases with time or increases firstly and then decreases; (2) too large grouting flow or too small grouting flow is unfavorable to the diffusion of grout; (3) the grouting pressure decreases as the mass fractal dimension increases.

Keywords

Grouting pressure Micro-mechanism Filtration Fractal dimension 

References

  1. 1.
    Yoon, J., Mohtar, C.S.E.: A filtration model for evaluating maximum penetration distance of bentonite grout through granular soils. Comput. Geotech. 65, 291–301 (2015)CrossRefGoogle Scholar
  2. 2.
    Yang, X.Z., Lei, J.S., Xia, L.N., Wang, X.H.: Study on grouting diffusion radius of exponential fluids. Rock Soil Mech. 26(11), 1803–1806 (2005)Google Scholar
  3. 3.
    Zou, J.F., Liang, L.I., Yang, X.L.: Penetration radius and pressure attenuation law in fracturing grouting. J. Hydraul. Eng. 37(3), 314–319 (2006)Google Scholar
  4. 4.
    Kelessidis, V.C., Dalamarinis, P., Maglione, R.: Experimental study and predictions of pressure losses of fluids modeled as Herschel–Bulkley in concentric and eccentric annuli in laminar, transitional and turbulent flows. J. Petrol. Sci. Eng. 77(3–4), 305–312 (2011)CrossRefGoogle Scholar
  5. 5.
    Widmann, R.: International society for rock mechanics commission on rock grouting. Int. J. Rock Mech. Min. Sci. Geomech. Abs. 33(8), 803–847 (1996)CrossRefGoogle Scholar
  6. 6.
    Fazeli, M.: A fractal approach for estimating soil water retention curve. Environ. Manag. 1, 177–183 (2010)Google Scholar
  7. 7.
    Zhou, Z.L., Du, X.M., Wang, S.Y., et al.: Cement grout transport within sand with fractal characteristics considering filtration. Eur. J. Environ. Civil Eng. (2017).  https://doi.org/10.1080/19648189.2017.1358217
  8. 8.
    Draganović, A., Stille, H.: Filtration of cement-based grouts measured using a long slot. Tunn. Undergr. Space Technol. Incorporating Trenchless Technol. Res. 43(7), 101–112 (2014)CrossRefGoogle Scholar
  9. 9.
    Wang, Q.L., Tang, H., Lv, D.L., et al.: An experimental study on threshold pressure gradient in low permeability reservoir. Petrol. Geol. Recovery Effi. 18(1), 97–100 (2011)Google Scholar
  10. 10.
    Zhang, J.R., Huang, L., Zhu, J., Huang, W.Z.: Sem analysis of soil pore and its fractal dimension on micro scale. Acta Pedol. Sin. 45, 207–215 (2008)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Zilong Zhou
    • 1
  • Xueming Du
    • 1
    • 2
  • Shanyong Wang
    • 2
  • Xin Cai
    • 1
  1. 1.School of Resources and Safety EngineeringCentral South UniversityChangshaChina
  2. 2.Faculty of Engineering and Built Environment, ARC Centre of Excellence for Geotechnical Science and EngineeringThe University of NewcastleCallaghanAustralia

Personalised recommendations