Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity
Study of frozen rock mechanical properties is necessary for safe application of the artificial ground freezing method in excavation of Chinese western water-rich soft rock layers. Triaxial compression tests and NMR test for samples from the western Jurassic sandstone were performed to investigate ro...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2020/2936932 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849413547311759360 |
|---|---|
| author | Maoyan Ma Yishun Huang Guangyong Cao Jian Lin Shiliang Xu |
| author_facet | Maoyan Ma Yishun Huang Guangyong Cao Jian Lin Shiliang Xu |
| author_sort | Maoyan Ma |
| collection | DOAJ |
| description | Study of frozen rock mechanical properties is necessary for safe application of the artificial ground freezing method in excavation of Chinese western water-rich soft rock layers. Triaxial compression tests and NMR test for samples from the western Jurassic sandstone were performed to investigate rock mechanical properties affected by low temperature and confining pressure. The results show mechanical parameters such as peak strength, cohesion, internal friction angle, residual strength, and elasticity modulus increased with the decreasing temperature under stable pressure, and the above parameters increased with the increasing confining pressure at a certain temperature. In particular, the growth rate of the rock strength would decline when the temperature was below −10°C in this study. Strength attenuation coefficients increased with the decreasing temperature, which indicated higher brittleness, whereas plastic characters got more obvious with the increasing confining pressure at a stable temperature. Furthermore, during the first two freezing stages, porosity decreased sharply with obvious increase of pore (crack) ice content, while porosity varied little at the third stage, which was the reason for the growth rate of rock strength declining with continuous low temperature from microcosmic point of view. |
| format | Article |
| id | doaj-art-6fdb75190818424694f3cac894f6db3c |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-6fdb75190818424694f3cac894f6db3c2025-08-20T03:34:04ZengWileyJournal of Chemistry2090-90632090-90712020-01-01202010.1155/2020/29369322936932Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR PorosityMaoyan Ma0Yishun Huang1Guangyong Cao2Jian Lin3Shiliang Xu4Anhui Key Laboratory of Building Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, ChinaChendu JZFZ Architectural Design Co. Ltd., Hefei 230031, ChinaAnhui Key Laboratory of Building Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, ChinaAnhui Key Laboratory of Building Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, ChinaAnhui Key Laboratory of Building Structure and Underground Engineering, Anhui Jianzhu University, Hefei 230601, ChinaStudy of frozen rock mechanical properties is necessary for safe application of the artificial ground freezing method in excavation of Chinese western water-rich soft rock layers. Triaxial compression tests and NMR test for samples from the western Jurassic sandstone were performed to investigate rock mechanical properties affected by low temperature and confining pressure. The results show mechanical parameters such as peak strength, cohesion, internal friction angle, residual strength, and elasticity modulus increased with the decreasing temperature under stable pressure, and the above parameters increased with the increasing confining pressure at a certain temperature. In particular, the growth rate of the rock strength would decline when the temperature was below −10°C in this study. Strength attenuation coefficients increased with the decreasing temperature, which indicated higher brittleness, whereas plastic characters got more obvious with the increasing confining pressure at a stable temperature. Furthermore, during the first two freezing stages, porosity decreased sharply with obvious increase of pore (crack) ice content, while porosity varied little at the third stage, which was the reason for the growth rate of rock strength declining with continuous low temperature from microcosmic point of view.http://dx.doi.org/10.1155/2020/2936932 |
| spellingShingle | Maoyan Ma Yishun Huang Guangyong Cao Jian Lin Shiliang Xu Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity Journal of Chemistry |
| title | Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity |
| title_full | Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity |
| title_fullStr | Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity |
| title_full_unstemmed | Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity |
| title_short | Study on Mechanical Behavior of Jurassic Frozen Sandstone in Western China Based on NMR Porosity |
| title_sort | study on mechanical behavior of jurassic frozen sandstone in western china based on nmr porosity |
| url | http://dx.doi.org/10.1155/2020/2936932 |
| work_keys_str_mv | AT maoyanma studyonmechanicalbehaviorofjurassicfrozensandstoneinwesternchinabasedonnmrporosity AT yishunhuang studyonmechanicalbehaviorofjurassicfrozensandstoneinwesternchinabasedonnmrporosity AT guangyongcao studyonmechanicalbehaviorofjurassicfrozensandstoneinwesternchinabasedonnmrporosity AT jianlin studyonmechanicalbehaviorofjurassicfrozensandstoneinwesternchinabasedonnmrporosity AT shiliangxu studyonmechanicalbehaviorofjurassicfrozensandstoneinwesternchinabasedonnmrporosity |