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Quantitative analysis of the influence of saturation on rock strength reduction considering the distribution of water

  • Diyuan LiEmail author
  • Wenjian Wang
Technical Note
  • 7 Downloads

Abstract

Uniaxial compressive strength (UCS) of rocks usually decreases by the presence of water. It is widely observed that the strength of rock decreases rapidly with increasing water content at low saturation levels, but decreases insignificantly with increasing water content at high saturation levels. In this study, a parameter (critical degree of saturation) is established to separate the two stages. Another parameter (variation of saturation degree per unit length) is established to describe the distribution of water in cylindrical specimen. Based on the two parameters, an analytical solution of normalized UCS of rock with different degrees of saturation is proposed. Using published experimental data, a desired fitting result is obtained. A simplified and conservative form of the analytical solution is proposed for rock engineering. The analytical solution is expected to provide some new insights to understand the weakening effect of rock strength by the presence of water.

Keywords

Analytical solution Uniaxial compressive strength Water Degree of saturation Strength reduction 

List of symbols

a, b and c

Material constant

Aw

Water absorption

H

Height of cylindrical specimen

k

Variation of saturation degree per unit length

r

Radius of cylindrical specimen

kr

Combined parameter

Sr

Degree of saturation

Sr(x)

Degree of saturation of one element

Src

Critical degree of saturation

Srn

Degree of saturation of natural rock

t

A parameter about the position of incompletely saturated elements

w

Water content

x

Distance between one element and the axis of the cylindrical specimen

UCS

Uniaxial compressive strength

UCSdry

Uniaxial compressive strength of dry rock

UCSsat

Uniaxial compressive strength of saturated rock

UCSnatural

Uniaxial compressive strength of natural rock

UCSn

Normalized uniaxial compressive strength

UCSn(x)

Normalized uniaxial compressive strength of one element

UCSloss

Loss proportion of uniaxial compressive strength

Notes

Acknowledgements

The authors would like to acknowledge the financial supports from the National Natural Science Foundation of China (No. 51474250), the State Key Research Development Program of China (No. 2016YFC0600706) and Project of Innovation-driven Plan in Central South University (No. 2018CX020).

Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

References

  1. Brignoli M, Santarelli FJ, Papamichos E (1995) Capillary effects in sedimentary rocks: application to reservoir water-flooding. In: 35th US symposium on rock mechanics, pp 619–626Google Scholar
  2. Çelik MY, Ergül A (2015) The influence of the water saturation on the strength of volcanic tuffs used as building stones. Environ Earth Sci 74:3223–3239CrossRefGoogle Scholar
  3. Cherblanc F, Berthonneau J, Bromblet P, Huon V (2016) Influence of water content on the mechanical behaviour of limestone: role of the clay minerals content. Rock Mech Rock Eng 49:2033–2042CrossRefGoogle Scholar
  4. Ciantia MO, Castellanza R, Prisco CD (2015) Experimental study on the water-induced weakening of calcarenites. Rock Mech Rock Eng 48(2):441–461CrossRefGoogle Scholar
  5. Conte E, Donato A, Troncone A (2016) A simplified method for predicting rainfall-induced mobility of active landslides. Landslides 14:35–45CrossRefGoogle Scholar
  6. Daraei A, Zare S (2018) Determination of critical saturation degree in rocks based on maximum loss of uniaxial compression strength and deformation modulus. Geomech Geophys Geo-energ Geo-resour 4:343–353CrossRefGoogle Scholar
  7. Dyke CG, Dobereiner L (1991) Evaluating the strength and deformability of sandstones. Q J Eng Geol 24(1):123–134CrossRefGoogle Scholar
  8. Eberhardt E (2012) The Hoek–Brown failure criterion. Rock Mech Rock Eng 45(6):981–988CrossRefGoogle Scholar
  9. Eeckhout EMV (1976) The mechanisms of strength reduction due to moisture in coal mine shales. Int J Rock Mech Min Sci Geomech Abstr 13(2):61–67CrossRefGoogle Scholar
  10. Erguler ZA, Ulusay R (2009) Water-induced variations in mechanical properties of clay-bearing rocks. Int J Rock Mech Min Sci 46:355–370CrossRefGoogle Scholar
  11. Hawkins AB, Mcconnell BJ (1992) Sensitivity of sandstone strength and deformability to changes in moisture content. Q J Eng Geol 25:115–130CrossRefGoogle Scholar
  12. Li D, Wong LNY, Liu G, Zhang X (2012) Influence of water content and anisotropy on the strength and deformability of low porosity meta-sedimentary rocks under triaxial compression. Eng Geol 126:46–66CrossRefGoogle Scholar
  13. Lin ML, Jeng FS, Tsai LS, Huang TH (2005) Wetting weakening of tertiary sandstones—microscopic mechanism. Environ Geol 48:265–275CrossRefGoogle Scholar
  14. Mann RL (1960) Effect of pore fluids on the elastic properties of sandstone. Geophysics 25:433–444CrossRefGoogle Scholar
  15. Masoumi H, Horne J, Timms W (2017) Establishing empirical relationships for the effects of water content on the mechanical behavior of gosford sandstone. Rock Mech Rock Eng 50:2235–2242CrossRefGoogle Scholar
  16. Papamichos E, Brignoli M, Santarelli FJ (1997) An experimental and theoretical study of a partially saturated collapsible rock. Mech Cohes-Frict Mater 2:251–278CrossRefGoogle Scholar
  17. Peruccacci S, Brunetti MT, Gariano SL, Melillo M, Rossi M, Guzzetti F (2017) Rainfall thresholds for possible landslide occurrence in Italy. Geomorphology 290:39–57CrossRefGoogle Scholar
  18. Piane CD, Sarout J (2016) Effects of water and supercritical CO2 on the mechanical and elastic properties of berea sandstone. Int J Greenh Gas Control 55:209–220CrossRefGoogle Scholar
  19. Rajabzadeh MA, Moosavinasab Z, Rakhshandehroo G (2012) Effects of rock classes and porosity on the relation between uniaxial compressive strength and some rock properties for carbonate rocks. Rock Mech Rock Eng 45(1):113–122CrossRefGoogle Scholar
  20. Rathnaweera TD, Ranjith PG, Perera MSA, Lashin A, Al Arifi N (2015) Non-linear stress–strain behaviour of reservoir rock under brine saturation: an experimental study. Measurement 71:56–72CrossRefGoogle Scholar
  21. Rathnaweera TD, Romain L, Ranjith PG, Perera MSA (2016) Deformation mechanics and acoustic propagation in reservoir rock under brine and oil saturation: an experimental study. Energy Procedia 88:544–551CrossRefGoogle Scholar
  22. Shakoor A, Barefield EH (2009) Relationship between unconfined compressive strength and degree of saturation for selected sandstones. Environ Eng Geosci 15:29–40CrossRefGoogle Scholar
  23. Shi S, Xie X, Bu L, Li L, Zhou Z (2018) Hazard-based evaluation model of water inrush disaster sources in karst tunnels and its engineering application. Environ Earth Sci 77(4):141CrossRefGoogle Scholar
  24. Taibi S, Duperret A, Fleureau JM (2009) The effect of suction on the hydro-mechanical behaviour of chalk rocks. Eng Geol 106(1):40–50CrossRefGoogle Scholar
  25. Török Á, Vásárhelyi B (2010) The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Eng Geol 115:237–245CrossRefGoogle Scholar
  26. Vásárhelyi B (2005) Statistical analysis of the influence of water content on the strength of the miocene limestone. Rock Mech Rock Eng 38(1):69–76CrossRefGoogle Scholar
  27. Vásárhelyi B, Ván P (2006) Influence of water content on the strength of rock. Eng Geol 84(1–2):70–74CrossRefGoogle Scholar
  28. Vergara MR, Triantafyllidis T (2016) Influence of water content on the mechanical properties of an argillaceous swelling rock. Rock Mech Rock Eng 49:2555–2568CrossRefGoogle Scholar
  29. Yilmaz I (2010) Influence of water content on the strength and deformability of gypsum. Int J Rock Mech Min Sci 47(2):342–347CrossRefGoogle Scholar
  30. Zhang DC, Gamage RP, Perera MSA, Zhang CP, Wanniarachchi WAM (2017) Influence of water saturation on the mechanical behaviour of low-permeability reservoir rocks. Energies 10(2):236CrossRefGoogle Scholar
  31. Zhou Z, Cai X, Cao W, Li X, Xiong C (2016) Influence of water content on mechanical properties of rock in both saturation and drying processes. Rock Mech Rock Eng 49:3009–3025CrossRefGoogle Scholar
  32. Zhu B, Wu L, Peng Y, Zhou W, Chen C (2017) Risk assessment of water inrush in tunnel through water-rich fault. Geotech Geol Eng 36(1):317–326CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.School of Resources and Safety EngineeringCentral South UniversityChangshaPeople’s Republic of China

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