| CPT-Based estimation of undrained shear strength of fine-grained soils in the Huanghe River Delta |
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| 作者姓名： | Zhongnian Yang Xuesen Liu Lei Guo Yuxue Cui Xiuting Su Chao Jia Xianzhang Ling |
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| 作者单位： | 1. School of Civil Engineering, Qingdao University of Technology;2. College of Environment Science and Engineering, Ocean University of China;3. Institute of Marine Science and Technology, Shandong University;4. School of Civil Engineering, Harbin Institute of Technology |
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| 基金项目： | The National Natural Science Foundation of China under contract Nos S42177153, U2006213 and 41806075； |
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| 摘 要： | The Huanghe River（Yellow River） Delta has a wide distribution of fine-grained soils. Fluvial alluviation, erosion,and wave loads affect the shoal area, resulting complex physical and mechanical properties to sensitive fine-grained soil located at the river-sea boundary. The cone penetration test（CPT） is a convenient and effective in situ testing method which can accurately identify various soil parameters. Studies on undrained shear strength only roughly determine the fine content（FC） without ma...
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CPT-Based estimation of undrained shear strength of fine-grained soils in the Huanghe River Delta |
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| Zhongnian Yang,Xuesen Liu,Lei Guo,Yuxue Cui,Xiuting Su,Chao Jia,Xianzhang Ling.CPT-Based estimation of undrained shear strength of fine-grained soils in the Huanghe River Delta[J].Acta Oceanologica Sinica,2022,41(5):136-146. |
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| Authors: | Zhongnian Yang Xuesen Liu Lei Guo Yuxue Cui Xiuting Su Chao Jia Xianzhang Ling |
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| Institution: | 1.School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China2.Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China3.College of Environment Science and Engineering, Ocean University of China, Qingdao 266100, China4.School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The Huanghe River (Yellow River) Delta has a wide distribution of fine-grained soils. Fluvial alluviation, erosion, and wave loads affect the shoal area, resulting complex physical and mechanical properties to sensitive fine-grained soil located at the river-sea boundary. The cone penetration test (CPT) is a convenient and effective in situ testing method which can accurately identify various soil parameters. Studies on undrained shear strength only roughly determine the fine content (FC) without making the FC effect clear. We studied four stations formed in different the Huanghe River Delta periods. We conducted in situ CPT and corresponding laboratory tests, examined the fine content influence on undrained shear strength (Su), and determined the cone coefficient (Nk). The conclusions are as follows. (1) The fine content in the area exceeded 90%, and the silt content was high, accounting for more than 70% of all fine particle compositions. (2) The undrained shear strength gradually increased with depth with a maximum of approximately 250 kPa. When the silt content was lower than 60%–70%, the undrained shear strength decreased. (3) The silt and clay content influenced undrained shear strength, and the fitted fsh/qt function model was established, which could be applied to strata with a high fine content. The cone coefficients were between 20 and 25, and the overconsolidated soil layer had a greater cone coefficient. |
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| Keywords: | Huanghe River (Yellow River) Delta fine content (FC) cone penetration test (CPT) undrained shear strength (Su) cone coefficient (Nk) |
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