Author
Listed:
- Jinmao Ju
(College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China)
- Honglin Liu
(College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China
Key Laboratory of Environmental Protection Mining for Minerals Resources at Universities of Education Department of Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830047, China)
- Hongqian Hu
(College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China)
- Yinjian Hang
(Xinjiang Sail Energy Co., Ltd., Xuzhou Coal Mining Group, Tacheng 834700, China)
- Chengfang Shan
(Kuche County Yushuling Coal Mine Co., Ltd., Kuche 842000, China)
- Hongzhi Wang
(College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China)
Abstract
The Baishitou Tunnel of the Dali–Lincang railway project is a weakly cemented surrounding rock tunnel with geological bedding bias. The deformation of the surrounding rock on the side with the greatest stress is nearly 1 m, which seriously affects construction progress and significantly increases construction cost. In order to achieve the goal of safe, efficient, economic, and socially sustainable development in tunnel construction, it is necessary to study the large deformation of weakly cemented surrounding rock in the geological bedding bias tunnel. Engineering technicians first used field measurement methods to monitor the pressure and deformation of surrounding rock and studied the deformation law of surrounding rock pressure and deformation over time. Secondly, numerical simulation methods were used to study the stress distribution law, plastic failure depth, and initial support stress of tunnel-surrounding rock under different support schemes, and they independently designed a yielding anchor bolt with enhanced anchoring, which plays a key role in controlling the deformation of the surrounding rock. The main conclusions are as follows: (1) Through the analysis of the measured pressure data of the initial branch of the section and the displacement monitoring data of the measuring point, it is found that the deformation of the surrounding rock of the weakly cemented tunnel is large and fast. At the same time, the pressure and deformation of the surrounding rock of the tunnel are greatly affected by geological bedding bias. After the excavation of the inverted arch, the pressure and deformation of the surrounding rock at the right arch shoulder of the tunnel are the highest, reaching 0.832 MPa and 0.53 m, which are significantly greater than those on the left arch shoulder. (2) Using the numerical simulation software FLAC3D 5.0 and ANSYS 16.0, a three-dimensional numerical model of the roadway was established to simulate the stress distribution, plastic failure depth, and initial support stress of the tunnel’s surrounding rock under the influence of geological bedding bias. By comparing the support effects of different support schemes, it was concluded that under the support scheme of “I25 arch + yielding anchor bolt”, the surrounding rock failure depth was small, the stress concentration was weak, and the initial support deformation was controllable as a whole. (3) The self-designed yielding anchor bolt has good economic and applicable value, and it has received the expected support effect after field verification. (4) Various special support measures such as advanced grouting anchor rods, casing arches, or temporary cross supports are used to assist in controlling the large deformation of weakly cemented surrounding rock tunnels to a certain extent.
Suggested Citation
Jinmao Ju & Honglin Liu & Hongqian Hu & Yinjian Hang & Chengfang Shan & Hongzhi Wang, 2023.
"Analysis of Control Technology for Large Deformation of a Geological Bedding Bias Tunnel with Weakly Cemented Surrounding Rock,"
Sustainability, MDPI, vol. 15(18), pages 1-15, September.
Handle:
RePEc:gam:jsusta:v:15:y:2023:i:18:p:13702-:d:1239465
Download full text from publisher
References listed on IDEAS
- Darinde Gijzel & Marian Bosch-Rekveldt & Daan Schraven & Marcel Hertogh, 2019.
"Integrating Sustainability into Major Infrastructure Projects: Four Perspectives on Sustainable Tunnel Development,"
Sustainability, MDPI, vol. 12(1), pages 1-18, December.
- Qi Yanli & Wen Shaoquan & Bai Mingzhou & Shi Hai & Li Pengxiang & Zhou Hao & He Bohu, 2021.
"Evaluation and Deformation Control Study on the Bias Pressure of Layered Rock Tunnels,"
Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-20, August.
- Yongli Liu & Jingtao Li & Yanwei Duan & Tao Qin & Zhenwen Liu, 2023.
"Study on the Influence of Roadway Structural Morphology on the Mechanical Properties of Weakly Cemented Soft Rock Roadways,"
Sustainability, MDPI, vol. 15(1), pages 1-16, January.
Full references (including those not matched with items on IDEAS)
Most related items
These are the items that most often cite the same works as this one and are cited by the same works as this one.
Corrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:15:y:2023:i:18:p:13702-:d:1239465. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .
Please note that corrections may take a couple of weeks to filter through
the various RePEc services.