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Experimental Study on Mechanical Properties of Surrounding Silty Clay of Foundation Pit with Different Stress Paths
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Lijun WANG1, Yang LIU2, Zhongming HE3, Panpan WANG3
Mining and Metallurgical Engineering | 2023, 43(6) : 34 - 40
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Mining and Metallurgical Engineering | 2023, 43(6): 34-40
• MINING •
Experimental Study on Mechanical Properties of Surrounding Silty Clay of Foundation Pit with Different Stress Paths
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Lijun WANG1, Yang LIU2, Zhongming HE3, Panpan WANG3
Affiliations
  • 1.Guangzhou Metro Group Co Ltd, Guangzhou 510380, Guangdong, China
  • 2.Pingjiang County Transportation Bureau, Pingjiang 414000, Hunan, China
  • 3.School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, Hunan, China
Published: 2023-12-01 doi: 10.3969/j.issn.0253-6099.2023.06.008
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Based on a deep foundation pit project for Pazhou Station of Guangzhou Metro, numerical simulation was conducted with FLAC3D finite element software for foundation pit excavation. Shear test schemes with different stress paths were prepared based on the stress state of the surrounding soil of the foundation pit, and the influence of different stress path on the mechanical properties of the soil was also studied. The results indicate that stress path can bring significant impact to the stress-strain relationship, pore pressure, and shear strength indicators of the soil. The shear strength of the soil in consideration of the unloading stress path of the foundation pit is lower than the shear strength obtained from conventional tests.

foundation pit excavation  /  numerical simulation  /  stress path  /  triaxial test  /  silty clay  /  mechanical properties
Lijun WANG, Yang LIU, Zhongming HE, Panpan WANG. Experimental Study on Mechanical Properties of Surrounding Silty Clay of Foundation Pit with Different Stress Paths[J]. Mining and Metallurgical Engineering, 2023 , 43 (6) : 34 -40 . DOI: 10.3969/j.issn.0253-6099.2023.06.008
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.06.008
  • Receive Date：2023-06-30
  • Online Date：2026-03-05
  • Published：2023-12-01
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  • Received：2023-06-30
Funding
Affiliations
    1.Guangzhou Metro Group Co Ltd, Guangzhou 510380, Guangdong, China
    2.Pingjiang County Transportation Bureau, Pingjiang 414000, Hunan, China
    3.School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, Hunan, 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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