Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay
Using the triaxial shear or compressive strength as a single index of the resistance of frozen soils to failure does not always meet frozen soil engineering requirements for the comprehensive evaluation of the resistance. In this study, triaxial compression experiments were carried out on undisturbe...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/2/203 |
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| author | Haimin Du Shujuan Zhang Wei Ma Yanhu Mu Tao Cheng Yunzhi Zhang |
| author_facet | Haimin Du Shujuan Zhang Wei Ma Yanhu Mu Tao Cheng Yunzhi Zhang |
| author_sort | Haimin Du |
| collection | DOAJ |
| description | Using the triaxial shear or compressive strength as a single index of the resistance of frozen soils to failure does not always meet frozen soil engineering requirements for the comprehensive evaluation of the resistance. In this study, triaxial compression experiments were carried out on undisturbed ice-rich frozen clay samples with various levels of water content under different confining pressures to study the characteristics of the failure strain energy density of the samples. The results indicate that as the confining pressure increased, the failure strain energy density first increased and then decreased. The failure strain energy density reached a maximum at a critical confining pressure of 2.00 MPa for 13.25–25.76% water content and 1.00 MPa for 26.02–45.82% water content. The failure strain energy density increased as the water content increased at low confining pressures (0.05–0.50 MPa) but then declined slightly at intermediate confining pressures (1.00–2.00 MPa). At a high confined pressure of 3.00 MPa, the failure strain energy density decreased overall as the water content increased. There were similarities and differences between the change characteristics of the compressive strength and the failure strain energy density. The failure strain energy density can be used as a supplementary reference index of the resistance of frozen soils to damage. The variation characteristics of the failure strain energy density of undisturbed frozen clay are essentially consistent with those of remolded frozen sandy soils. However, there are also clear differences between the characteristics of the failure strain energy density of these two types of frozen soil. |
| first_indexed | 2024-03-11T09:11:33Z |
| format | Article |
| id | doaj.art-f7989a9408244163969b3f4f0b70ce79 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-11T09:11:33Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-f7989a9408244163969b3f4f0b70ce792023-11-16T19:01:31ZengMDPI AGAtmosphere2073-44332023-01-0114220310.3390/atmos14020203Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen ClayHaimin Du0Shujuan Zhang1Wei Ma2Yanhu Mu3Tao Cheng4Yunzhi Zhang5School of Civil Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaSchool of Civil Engineering, Hubei Polytechnic University, Huangshi 435003, ChinaSinohydro Bureau 6 Co., Ltd., Power China, Shenyang 110179, ChinaUsing the triaxial shear or compressive strength as a single index of the resistance of frozen soils to failure does not always meet frozen soil engineering requirements for the comprehensive evaluation of the resistance. In this study, triaxial compression experiments were carried out on undisturbed ice-rich frozen clay samples with various levels of water content under different confining pressures to study the characteristics of the failure strain energy density of the samples. The results indicate that as the confining pressure increased, the failure strain energy density first increased and then decreased. The failure strain energy density reached a maximum at a critical confining pressure of 2.00 MPa for 13.25–25.76% water content and 1.00 MPa for 26.02–45.82% water content. The failure strain energy density increased as the water content increased at low confining pressures (0.05–0.50 MPa) but then declined slightly at intermediate confining pressures (1.00–2.00 MPa). At a high confined pressure of 3.00 MPa, the failure strain energy density decreased overall as the water content increased. There were similarities and differences between the change characteristics of the compressive strength and the failure strain energy density. The failure strain energy density can be used as a supplementary reference index of the resistance of frozen soils to damage. The variation characteristics of the failure strain energy density of undisturbed frozen clay are essentially consistent with those of remolded frozen sandy soils. However, there are also clear differences between the characteristics of the failure strain energy density of these two types of frozen soil.https://www.mdpi.com/2073-4433/14/2/203undisturbed ice-rich frozen claytriaxial compressionfailure strain energy densityconfined pressurewater content |
| spellingShingle | Haimin Du Shujuan Zhang Wei Ma Yanhu Mu Tao Cheng Yunzhi Zhang Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay Atmosphere undisturbed ice-rich frozen clay triaxial compression failure strain energy density confined pressure water content |
| title | Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay |
| title_full | Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay |
| title_fullStr | Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay |
| title_full_unstemmed | Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay |
| title_short | Experimental Study on the Characteristics of the Failure Strain Energy Density of Undisturbed Ice-Rich Frozen Clay |
| title_sort | experimental study on the characteristics of the failure strain energy density of undisturbed ice rich frozen clay |
| topic | undisturbed ice-rich frozen clay triaxial compression failure strain energy density confined pressure water content |
| url | https://www.mdpi.com/2073-4433/14/2/203 |
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