Volume 38 Issue 5
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Li Lingfeng, Wang Qinyuan, Wang Junyang. Shear Strength Index Reduction Method Based on Water Content Change in Design and Calculation of Foundation Supporting in Expansive Soil[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 554-559. doi: 10.3969/j.issn.1007-2993.2024.05.008
Citation: Li Lingfeng, Wang Qinyuan, Wang Junyang. Shear Strength Index Reduction Method Based on Water Content Change in Design and Calculation of Foundation Supporting in Expansive Soil[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 554-559. doi: 10.3969/j.issn.1007-2993.2024.05.008
shu

Shear Strength Index Reduction Method Based on Water Content Change in Design and Calculation of Foundation Supporting in Expansive Soil

doi: 10.3969/j.issn.1007-2993.2024.05.008

  • Avic Institute of Geotechnical Engineering Co., Ltd., Beijing 100089, China

  • Received Date: 2023-02-07
  • Accepted Date: 2023-07-14
  • Rev Recd Date: 2023-06-04
    • Available Online: 2024-10-09
  • Publish Date: 2024-10-09
    Abstract
  • Based on the laboratory test of expansive soil, the quantitative relationship between water content and shear strength index was statistically analyzed. Research shows that the shear strength index gradually decreases with the increase of water content. Compared with the internal friction angle φ, the cohesive force c is more sensitive to changes in water content. For each 5% increase in water content, cohesion c decreases by 7.5 kPa and internal friction angle φ 3° lower. On this basis, a shear strength index reduction method based on changes in water content was proposed for the design and calculation of expansive soil foundation pit support. The applicability of this method in the design of expansive soil foundation pit support was verified through engineering case calculations and on-site monitoring.

     

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