Abstract
The compacted soils are extensively employed as mineral liners or a sealing system, constructed under municipal solid waste and other containment hazardous materials to prevent or minimize the leakage of pollutant liquids and gases into ground water and sublayers. This article presents a detailed experimental study on settlement characteristics, which are required for the construction of a sealing system. For the experimental study where a compacted unsaturated soil taken from Adana in Turkey has been used, a special equipped consolidation cell has been designed and constructed. The matric suction adopted as independent stress-state variables has been controlled by using the axis translation technique. The consolidation tests have been performed under constant matric suction. Furthermore, the pressure plate tests for various net vertical stresses have been conducted. The test results have indicated that the settlement characteristics of a compacted soil as mineral liners and covers are highly affected by matric suction. The water retention capacity of mineral liners, an important factor for hydraulic conductivity, also changes with the vertical load. The compressibility decreases as the matric suction increases. It has been observed that there exists an exponential relationship between the compressive indexes (C t, D t) and matric suction.
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References
Bishop AW, Henkel DJ (1962) The measurement of soil properties in the triaxial test, 2nd edn. Edward Arnold, London, pp 227
Brandl H (1992) Mineral liners for hazardous waste containment. Geotechnique 42(1):57–65
Burland JB (1967) Deformation of soft clay. Ph.D. thesis, Cambridge University
Daniel DE, Benson CH (1990) Water content-density criteria for compacted soil liners. J Geotech Eng 116(12):1811–1830
Dunn CS (1965) Developments in the design of triaxial equipment for testing compacted soils. In: Proceedings of the symposium on economic use of soil testing in site investigation held in Birmingham, Alabama, vol 3, pp 19–25
Gan JKM, Fredlund DG (1988) Multistage direct shear testing of unsaturated soils. ASTM Geotech Test J 11(2):132–138
Fredlund DG, Hasan JU (1979) One-dimensional consolidation theory: unsaturated soils. Can Geotech J 16(3):521–531
Fredlund DG, Rahardjo H (1993) Soil mechanics for unsaturated soils. Wiley, New York
Fredlund DG, Morgenstern NR, Widger RA (1978) The shear strength of unsaturated soil. Can Geotech J 15:313–321
Hilf JW (1956) An investigation of pore water pressure in compacted cohesive soils. Tech. Memorandum No. 654, Bureau of Reclamation. US Department of Interior
Josa A, Alonso EE, Lloret A, Gens A (1987) Stress–strain behaviour of partially saturated soils at the laboratory. In: Proceedings 9th European conference on soil mechanics and foundation engineering, Dublin, vol 2, pp 561–564
Khalili N, Geisser F, Blight GE (2004) Effective stress in unsaturated soils: review with new evidence. Int J Geomech ASCE 4(2):115–126
Miao L, Liu S, Lai Y (2002) Research of soil–water characteristics and shear strength features of Nanyang expansive soil. Eng Geol Elsevier Sci 65:261–267
Montanez JEC (2002) Suction and volume changes of compacted sand-bentonite mixtures. Ph.D. Thesis, University of London
Oloo SY, Fredlund DG (1996) A method for determination of φb for statically compacted soils. Can Geotech J 33:272–280
Pham HQ (2005) A volume-mass constitutive model for unsaturated soils. Ph.D. Thesis, Department of Civil and Geological Engineering, Saskatoon, Saskatchewan, Canada
Pietruszczak S, Pande GN (1996) Constitutive relations for partially saturated soils containing gas inclusions. J Geotech Eng 122(1):50–59
Rahardjo H, Fredlund DG (1995) Experimental verification of the theory of consolidation for unsaturated soils. Can Geotech J 32:749–766
Rahardjo H, Fredlund DG (2003) Ko-volume change characteristics of unsaturated soil with respect to various loading paths. Geotech Test J 26(1):1–13
Romero E, Lloret A, Gens A (1995) Development of a new suction and temperature controlled oedometer cell. In: Proceedings of the 1st IC on unsaturated soils, UNSAT’95, Paris, vol 2, pp 33–559
Shuai F (1996) Simulation of swelling pressure measurements on expansive soils. Ph.D. Thesis, University of Saskatchewan, Department of Civil Engineering, Saskatoon, Canada
Sivakumar V (1993) A critical state framework for unsaturated soil. Ph.D. Thesis, University of Sheffield
Tekinsoy MA Kayadelen C, Keskin S, Söylemez M (2004) An equation for predicting shear strength envelope with respect to matric suction. Comput Geotech 31(7):589–593
Terzaghi K (1943) Theoretical soil mechanics. Wiley, New York
Wheeler SJ, Sivakumar V (1995) An elasto-plastic critical state framework for unsaturated soil. Geotechnique 45(1):35–53
Wong JC, Rahardjo H, Toll DG, Leong EC (2001) Modified triaxial apparatus for shearing-infiltration test. Geotechn Test J 24(4):370–380
Wulfsohn D, Adams BA, Fredlund DG (1998) Triaxial testing of unsaturated agricultural soils. J Agric Eng Res 69:317–330
Xu FY (2004) Fractal approach to unsaturated shear strength. J Geotech Geoenviron Eng ASCE 130(3):264–273
Yong RN, Japp RD, How G (1971) Shear strength of partially saturated clays. In: Proceedings of the 4th Asian regional conference on soil mechanics foundation engineering, Bangkok, vol 2(12), pp 183–187
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Kayadelen, C. The consolidation characteristics of an unsaturated compacted soil. Environ Geol 54, 325–334 (2008). https://doi.org/10.1007/s00254-007-0819-2
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DOI: https://doi.org/10.1007/s00254-007-0819-2