Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures
To investigate the influence of pore pressure (σw) on the creep behavior and permeability of red sandstone, triaxial creep test with permeability test under different pore pressures was conducted using MTS 815 testing system. The experimental results demonstrate that water has significant weakening...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6693131 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850224193645314048 |
|---|---|
| author | Hongcai Shi |
| author_facet | Hongcai Shi |
| author_sort | Hongcai Shi |
| collection | DOAJ |
| description | To investigate the influence of pore pressure (σw) on the creep behavior and permeability of red sandstone, triaxial creep test with permeability test under different pore pressures was conducted using MTS 815 testing system. The experimental results demonstrate that water has significant weakening effect on the long-term mechanical properties of sandstone, and the long-term strength of sandstone gradually decreases with increase in pore pressures. All permeability-time curves demonstrate a “decreasing-increasing” trend, but two different permeability evolution trends during the steady creep stage are observed, which are related to deviatoric stress. The permeability of both intact (k0) and fractured sandstone (kf) samples increases with the increase in pore pressure, which are in consistent with the failure mode analysis of fractured sandstone samples. However, while the relationship between k0 and σw is positive linear, it is a positive exponential function relationship between kf and σw. |
| format | Article |
| id | doaj-art-50fe218f109d4238a1d0cdcf607213b1 |
| institution | OA Journals |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-50fe218f109d4238a1d0cdcf607213b12025-08-20T02:05:42ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66931316693131Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore PressuresHongcai Shi0Department of Civil Architecture and Environment, Hubei University of Technology, Wuhan, 430068, ChinaTo investigate the influence of pore pressure (σw) on the creep behavior and permeability of red sandstone, triaxial creep test with permeability test under different pore pressures was conducted using MTS 815 testing system. The experimental results demonstrate that water has significant weakening effect on the long-term mechanical properties of sandstone, and the long-term strength of sandstone gradually decreases with increase in pore pressures. All permeability-time curves demonstrate a “decreasing-increasing” trend, but two different permeability evolution trends during the steady creep stage are observed, which are related to deviatoric stress. The permeability of both intact (k0) and fractured sandstone (kf) samples increases with the increase in pore pressure, which are in consistent with the failure mode analysis of fractured sandstone samples. However, while the relationship between k0 and σw is positive linear, it is a positive exponential function relationship between kf and σw.http://dx.doi.org/10.1155/2021/6693131 |
| spellingShingle | Hongcai Shi Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures Geofluids |
| title | Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures |
| title_full | Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures |
| title_fullStr | Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures |
| title_full_unstemmed | Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures |
| title_short | Investigation on Creep Behavior and Permeability Evolution Characteristics of Sandstone under Different Pore Pressures |
| title_sort | investigation on creep behavior and permeability evolution characteristics of sandstone under different pore pressures |
| url | http://dx.doi.org/10.1155/2021/6693131 |
| work_keys_str_mv | AT hongcaishi investigationoncreepbehaviorandpermeabilityevolutioncharacteristicsofsandstoneunderdifferentporepressures |