Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure
At present, there is no clear design standard for segmental joints of large-diameter shield tunnels under high water pressure. In this paper, a theoretical calculation model for the bending stiffness of segmental joints under high water pressure is proposed. The numerical simulation method is used t...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-12-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/21/24/8392 |
| _version_ | 1797500755815432192 |
|---|---|
| author | Lei Kou Zhihui Xiong Hao Cui Jinjie Zhao |
| author_facet | Lei Kou Zhihui Xiong Hao Cui Jinjie Zhao |
| author_sort | Lei Kou |
| collection | DOAJ |
| description | At present, there is no clear design standard for segmental joints of large-diameter shield tunnels under high water pressure. In this paper, a theoretical calculation model for the bending stiffness of segmental joints under high water pressure is proposed. The numerical simulation method is used to investigate the failure and crack formation processes of single-layer and double-layer lining segments under large axial forces. The effects of axial force, bolt strength, and concrete strength on the bending stiffness of joints are then studied using a theoretical calculation model of segmental joints. The results show that under extremely high water pressure, the influence of double lining on joint stiffness is limited. It is more rational and safe to compute the bending stiffness of segmental joints using this theoretical model rather than the numerical simulation method. The parameter analysis reveals that increasing the bolt strength has a minor impact on bending stiffness and deformation, whereas increasing the concrete strength has the opposite effect. The influence of ultimate bearing capacity and deformation decreases non-linearly as the axial force increases. |
| first_indexed | 2024-03-10T03:08:24Z |
| format | Article |
| id | doaj.art-223e24d72a1e445da65ad4f1e287e9b6 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T03:08:24Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-223e24d72a1e445da65ad4f1e287e9b62023-11-23T10:30:52ZengMDPI AGSensors1424-82202021-12-012124839210.3390/s21248392Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water PressureLei Kou0Zhihui Xiong1Hao Cui2Jinjie Zhao3School of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Water Conservancy Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaAt present, there is no clear design standard for segmental joints of large-diameter shield tunnels under high water pressure. In this paper, a theoretical calculation model for the bending stiffness of segmental joints under high water pressure is proposed. The numerical simulation method is used to investigate the failure and crack formation processes of single-layer and double-layer lining segments under large axial forces. The effects of axial force, bolt strength, and concrete strength on the bending stiffness of joints are then studied using a theoretical calculation model of segmental joints. The results show that under extremely high water pressure, the influence of double lining on joint stiffness is limited. It is more rational and safe to compute the bending stiffness of segmental joints using this theoretical model rather than the numerical simulation method. The parameter analysis reveals that increasing the bolt strength has a minor impact on bending stiffness and deformation, whereas increasing the concrete strength has the opposite effect. The influence of ultimate bearing capacity and deformation decreases non-linearly as the axial force increases.https://www.mdpi.com/1424-8220/21/24/8392high water pressureshield tunnelsegmental jointstheoretical modelnumerical simulation |
| spellingShingle | Lei Kou Zhihui Xiong Hao Cui Jinjie Zhao Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure Sensors high water pressure shield tunnel segmental joints theoretical model numerical simulation |
| title | Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure |
| title_full | Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure |
| title_fullStr | Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure |
| title_full_unstemmed | Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure |
| title_short | Study on Mechanical Characteristics of Segmental Joints of a Large-Diameter Shield Tunnel under Ultrahigh Water Pressure |
| title_sort | study on mechanical characteristics of segmental joints of a large diameter shield tunnel under ultrahigh water pressure |
| topic | high water pressure shield tunnel segmental joints theoretical model numerical simulation |
| url | https://www.mdpi.com/1424-8220/21/24/8392 |
| work_keys_str_mv | AT leikou studyonmechanicalcharacteristicsofsegmentaljointsofalargediametershieldtunnelunderultrahighwaterpressure AT zhihuixiong studyonmechanicalcharacteristicsofsegmentaljointsofalargediametershieldtunnelunderultrahighwaterpressure AT haocui studyonmechanicalcharacteristicsofsegmentaljointsofalargediametershieldtunnelunderultrahighwaterpressure AT jinjiezhao studyonmechanicalcharacteristicsofsegmentaljointsofalargediametershieldtunnelunderultrahighwaterpressure |