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Influence of Matrix Suction on the Shear Strength of Fully Weathered Granite
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Zhi-peng WANG1, Hong-jun LIU1, Wen-yu WU1, Ming-yue ZHAO2, Qi-gang WANG3, *
Science Technology and Engineering | 2025, 25(3) : 924 - 932
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Science Technology and Engineering | 2025, 25(3): 924-932
• Papers·Astronomy and Geosciences •
Influence of Matrix Suction on the Shear Strength of Fully Weathered Granite
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Zhi-peng WANG1, Hong-jun LIU1, Wen-yu WU1, Ming-yue ZHAO2, Qi-gang WANG3, *
Affiliations
  • 1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
  • 2. Qingdao Geological Engineering Survey Institute, Qingdao 266100, China
  • 3. Qingdao Academy of Surveying and Mapping Laoshan Branch, Qingdao 266100, China
Published: 2025-01-28 doi: 10.12404/j.issn.1671-1815.2308795
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Under the condition of heavy rainfall, the rock and soil saturation of fully weathered granite slope increases, and the shear strength decreases, which is easy to cause slope instability. In this process, the change of matrix suction is the key factor leading to the change of shear strength. Taking Laoshan fully weathered granite slope in Qingdao as the research object, the soil and water characteristic curve (SWCC) of fully weathered granite based on Van Genuchten model was obtained by means of centrifuge test, undrained direct shear test, X-ray diffraction analysis, conventional silicate chemical total analysis test and scanning electron microscope test. The effect of matrix suction on the shear strength of fully weathered granite was studied systematically. The results show these as follows. The saturation of fully weathered granite soil is negatively correlated with matrix suction, and the soil samples with uneven gradation have stronger drainage capacity. The shear strength index is affected by matrix suction differently. Cohesion is more sensitive to the change of matrix suction than the angle of internal friction. There is a positive correlation between matrix suction and shear strength in fully weathered granite soil. The research results can provide theoretical guidance for slope prevention in fully weathered granite area.

fully weathered granite  /  matrix suction  /  shear strength  /  saturation  /  SWCC
Zhi-peng WANG, Hong-jun LIU, Wen-yu WU, Ming-yue ZHAO, Qi-gang WANG. Influence of Matrix Suction on the Shear Strength of Fully Weathered Granite[J]. Science Technology and Engineering, 2025 , 25 (3) : 924 -932 . DOI: 10.12404/j.issn.1671-1815.2308795
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Article Info
doi: 10.12404/j.issn.1671-1815.2308795
  • Receive Date：2023-11-09
  • Online Date：2025-07-29
  • Published：2025-01-28
Article Data
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History
  • Received：2023-11-09
  • Revised：2024-06-05
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Affiliations
    1. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
    2. Qingdao Geological Engineering Survey Institute, Qingdao 266100, China
    3. Qingdao Academy of Surveying and Mapping Laoshan Branch, Qingdao 266100, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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