›› 2018, Vol. 39 ›› Issue (5): 1731-1736.doi: 10.16285/j.rsm.2016.1356

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Deformation characteristics of compacted Malan loess in Yan’an region under high consolidation pressure

KONG Yang1, 2, RUAN Huai-ning1, 2, HUANG Xue-feng3, 4   

  1. 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing, Jiangsu 210098, China; 3. Department of Architectural Engineering, Army Logistical University, Chongqing 401331, China; 4. Chongqing Key Laboratory of Geomechanics and Geoenvironmental Protection, Army Logistical University, Chongqing 401311
  • Received:2016-06-07 Online:2018-05-11 Published:2018-06-12
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51579081, 51379065) and the National Key Technology Support Program (2013BAJ06B04).

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Abstract: To investigate the deformation behavior of loess in the typical “Y” shape long and narrow gully landforms, a series of one-dimensional consolidation tests are carried out indoor under high-pressure conditions. Test results show that the Gunary Model is better than the hyperbolic model or the exponential function to represent the relation between vertical compressive stress and vertical compressive strain of compacted Malan loess. Using secant modulus, the modified formulas of deformation of foundation with compacted Malan loess are constructed to calculate the deformation considering the variation of loading, water content and compactness. The relation of secant modulus and the reciprocal of water content is in the form of quadratic polynomial. The widely used linear relation formula of secant modulus and compactness K is not consistent with the actual situation. Research results have an important reference value to the design and construction of gully type high loess-content landfill projects.

Key words: high-filled loess, compacted Malan loess, deformation characteristics, Gunary model, foundation settlement

CLC Number: 

  • TU 411

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