Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (11): 3182-3190.doi: 10.16285/j.rsm.2023.1089

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A practical approach for predicting lateral pressures on expansive soil retaining walls with geosynthetic inclusions

FAN Ke-wei1, ZOU Wei-lie2, WANG Liu-jiang3, LIAO Jie4, LIU Si-hong3   

  1. 1. Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Hohai University, Nanjing, Jiangsu 210098, China; 2. School of Civil Engineering, Wuhan University, Wuhan, Hubei 430072, China; 3. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 4. College of Civil Engineering, Sanjiang University, Nanjing, Jiangsu 210012, China
  • Received:2023-07-24 Accepted:2023-08-31 Online:2023-11-28 Published:2023-11-28
  • Supported by:
    This work was supported by the National Key Research and Development Project (2022YFE0105000), the National Natural Science Foundation of China (52308349), Jiangsu Provincial Natural Science Foundation (BK20230967), Jiangsu Provincial Excellent Postdoctoral Program (2023ZB830) and the Natural Science Research Project of Jiangsu Provincial Colleges and Universities (23KJB560022).

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Abstract: The development of a prediction method for the lateral pressure exerted on expansive soil retaining walls with geosynthetic inclusions has been identified as vital for the design of such structures when saturation of the backfilled expansive soil is achieved. It is assumed that the deformations of expansive soil are composed of swelling deformation due to water absorption by the soil and compression deformation induced by external loads. Within the tenets of elasticity, equations were devised to estimate the elastic modulus and swelling force of expansive soil, respectively. Parameters for these equations were determined through the swelling tests on the expansive soil with loadings. Based on the interaction relationship between the geosynthetic inclusions and the backfilled expansive soil, a practical prediction method for the lateral pressure exerted on expansive soil retaining walls with geosynthetic inclusions was developed when the expansive soil reached saturation, and its performance was fully validated by model tests of the expansive soil retaining wall with soilbag and expanded polystyrene geofoam (EPS) inclusions, respectively. It was observed that the lateral pressures calculated using the proposed method exhibited a well agreement with experimental measurements.

Key words: geosynthetics, expansive soil, retaining wall, lateral pressure, practical prediction method

CLC Number: 

  • TU 473
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