An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures
The excavation damage of deep tunnels is one of the most important factors contributing to the failure of tunnel structures. In order to investigate the influence of tunnel shapes and fissure geometries, the kernel function in the traditional SPH method has been improved, which can realize the britt...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5719171 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556253243506688 |
|---|---|
| author | Xuhua Ren Shuyang Yu Jixun Zhang Haijun Wang Zhaohua Sun |
| author_facet | Xuhua Ren Shuyang Yu Jixun Zhang Haijun Wang Zhaohua Sun |
| author_sort | Xuhua Ren |
| collection | DOAJ |
| description | The excavation damage of deep tunnels is one of the most important factors contributing to the failure of tunnel structures. In order to investigate the influence of tunnel shapes and fissure geometries, the kernel function in the traditional SPH method has been improved, which can realize the brittle fracture characteristics of particles and can be called the Improved Kernel of Smoothed Particle Hydrodynamics (IKSPH-2D). Meanwhile, the random fissure generation method in IKSPH has been put forward. Different tunnel shapes, fissure geometries, and locations are considered during the simulation of tunnel excavation, and results show that (1) the typical “V”-shaped shear damage zones appear after the tunnel excavation, which is consistent with engineering practice. Meanwhile, tunnel excavation also has an “activating” effect on the preexisting fissures. (2) The stability of circular-shaped tunnel is the best, while horseshoe shaped tunnel is worse, and the “U”-shaped tunnel is the worst. (3) Fissures with small and large dip angles have the greatest influence on the stability of tunnel excavation. With the increase of fissure numbers and lengths, the tunnel tends to be instable. (4) The IKSPH method gets free from traditional grids in FEM, which can dynamically reflect the fracture processes of tunnel excavation. Meanwhile, developing 3D IKSPH parallel program will be the future directions. |
| format | Article |
| id | doaj-art-a787d6812d0a41ecab32c7f267343f05 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-a787d6812d0a41ecab32c7f267343f052025-02-03T05:45:57ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/57191715719171An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random FissuresXuhua Ren0Shuyang Yu1Jixun Zhang2Haijun Wang3Zhaohua Sun4College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, ChinaState Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaSchool of Transportation and Civil Engineering, Nantong University, 9 Seyuan Road, Nantong 226019, ChinaThe excavation damage of deep tunnels is one of the most important factors contributing to the failure of tunnel structures. In order to investigate the influence of tunnel shapes and fissure geometries, the kernel function in the traditional SPH method has been improved, which can realize the brittle fracture characteristics of particles and can be called the Improved Kernel of Smoothed Particle Hydrodynamics (IKSPH-2D). Meanwhile, the random fissure generation method in IKSPH has been put forward. Different tunnel shapes, fissure geometries, and locations are considered during the simulation of tunnel excavation, and results show that (1) the typical “V”-shaped shear damage zones appear after the tunnel excavation, which is consistent with engineering practice. Meanwhile, tunnel excavation also has an “activating” effect on the preexisting fissures. (2) The stability of circular-shaped tunnel is the best, while horseshoe shaped tunnel is worse, and the “U”-shaped tunnel is the worst. (3) Fissures with small and large dip angles have the greatest influence on the stability of tunnel excavation. With the increase of fissure numbers and lengths, the tunnel tends to be instable. (4) The IKSPH method gets free from traditional grids in FEM, which can dynamically reflect the fracture processes of tunnel excavation. Meanwhile, developing 3D IKSPH parallel program will be the future directions.http://dx.doi.org/10.1155/2021/5719171 |
| spellingShingle | Xuhua Ren Shuyang Yu Jixun Zhang Haijun Wang Zhaohua Sun An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures Geofluids |
| title | An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures |
| title_full | An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures |
| title_fullStr | An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures |
| title_full_unstemmed | An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures |
| title_short | An Improved Form of 2D SPH Method for Modeling the Excavation Damage of Tunnels Containing Random Fissures |
| title_sort | improved form of 2d sph method for modeling the excavation damage of tunnels containing random fissures |
| url | http://dx.doi.org/10.1155/2021/5719171 |
| work_keys_str_mv | AT xuhuaren animprovedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT shuyangyu animprovedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT jixunzhang animprovedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT haijunwang animprovedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT zhaohuasun animprovedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT xuhuaren improvedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT shuyangyu improvedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT jixunzhang improvedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT haijunwang improvedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures AT zhaohuasun improvedformof2dsphmethodformodelingtheexcavationdamageoftunnelscontainingrandomfissures |