The construction stability of large section tunnel considering the deterioration of clay mechanical properties
The stability of large-section clay tunnels is closely related to the mechanical behavior of the surrounding rock. The mechanical behavior of the surrounding rock is characterized by the coupled response of the physico-mechanical properties of the clay material and the tunnel construction conditions...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2023.1135276/full |
| _version_ | 1811170443111956480 |
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| author | Jun Huang Jun Huang Naifei Liu Zongyuan Ma Liang Lu Kangning Dang |
| author_facet | Jun Huang Jun Huang Naifei Liu Zongyuan Ma Liang Lu Kangning Dang |
| author_sort | Jun Huang |
| collection | DOAJ |
| description | The stability of large-section clay tunnels is closely related to the mechanical behavior of the surrounding rock. The mechanical behavior of the surrounding rock is characterized by the coupled response of the physico-mechanical properties of the clay material and the tunnel construction conditions. Therefore, this paper proposes a numerical experimental study based on the response surface method to quantitatively link the stability of large-section clay tunnels with construction factors. It will provide a basis for quantitatively guiding the tunnel construction plan adjustment to ensure its stability. Firstly, the tunnel stability reserve is evaluated by considering the deterioration of physico-mechanical properties of clay surrounding rocks, and the relationship between the tunnel stability index and construction factors is established according to Taylor’s theorem. Secondly, the response surface method and the steepest ascent method are used to find the optimal fitting relationship between the tunnel stability reserve factor and tunnel construction factors. Finally, the analysis of a tunnel application shows that (a) the stability evaluation considering the deterioration of physical and mechanical properties of clay is well representative; (b) the “curved” region of the response of the tunnel stability reserve factor can be effectively determined by the steepest slope method; (c) for the “curved” region, a second-order response surface is more appropriate. This research will reveal the coupling relationship between tunnel stability, physico-mechanical properties of clay, and tunnel construction conditions, which will contribute to the development of intelligent tunnel construction. |
| first_indexed | 2024-04-10T16:56:52Z |
| format | Article |
| id | doaj.art-e13e38e7b0ef4f099f5ff4a6e8fa81ff |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-10T16:56:52Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-e13e38e7b0ef4f099f5ff4a6e8fa81ff2023-02-07T06:47:19ZengFrontiers Media S.A.Frontiers in Materials2296-80162023-02-011010.3389/fmats.2023.11352761135276The construction stability of large section tunnel considering the deterioration of clay mechanical propertiesJun Huang0Jun Huang1Naifei Liu2Zongyuan Ma3Liang Lu4Kangning Dang5School of Earth Sciences and Engineering, Xi’an Shi-you University, Xi’an, ChinaShaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an University of Architecture and Technology, Xi’an, ChinaShaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an University of Architecture and Technology, Xi’an, ChinaGuizhou communications polytechnic, Guiyang, ChinaGansu Institute of Architectural Design and Research Co, LTD, Lanzhou, ChinaHanjiang-to-Weihe river valley water diversion project construction Co, LTD, Xi’an, ChinaThe stability of large-section clay tunnels is closely related to the mechanical behavior of the surrounding rock. The mechanical behavior of the surrounding rock is characterized by the coupled response of the physico-mechanical properties of the clay material and the tunnel construction conditions. Therefore, this paper proposes a numerical experimental study based on the response surface method to quantitatively link the stability of large-section clay tunnels with construction factors. It will provide a basis for quantitatively guiding the tunnel construction plan adjustment to ensure its stability. Firstly, the tunnel stability reserve is evaluated by considering the deterioration of physico-mechanical properties of clay surrounding rocks, and the relationship between the tunnel stability index and construction factors is established according to Taylor’s theorem. Secondly, the response surface method and the steepest ascent method are used to find the optimal fitting relationship between the tunnel stability reserve factor and tunnel construction factors. Finally, the analysis of a tunnel application shows that (a) the stability evaluation considering the deterioration of physical and mechanical properties of clay is well representative; (b) the “curved” region of the response of the tunnel stability reserve factor can be effectively determined by the steepest slope method; (c) for the “curved” region, a second-order response surface is more appropriate. This research will reveal the coupling relationship between tunnel stability, physico-mechanical properties of clay, and tunnel construction conditions, which will contribute to the development of intelligent tunnel construction.https://www.frontiersin.org/articles/10.3389/fmats.2023.1135276/fullphysico-mechanical properties of claystability evaluationconstruction factorsnumerical experimentresponse surface method |
| spellingShingle | Jun Huang Jun Huang Naifei Liu Zongyuan Ma Liang Lu Kangning Dang The construction stability of large section tunnel considering the deterioration of clay mechanical properties Frontiers in Materials physico-mechanical properties of clay stability evaluation construction factors numerical experiment response surface method |
| title | The construction stability of large section tunnel considering the deterioration of clay mechanical properties |
| title_full | The construction stability of large section tunnel considering the deterioration of clay mechanical properties |
| title_fullStr | The construction stability of large section tunnel considering the deterioration of clay mechanical properties |
| title_full_unstemmed | The construction stability of large section tunnel considering the deterioration of clay mechanical properties |
| title_short | The construction stability of large section tunnel considering the deterioration of clay mechanical properties |
| title_sort | construction stability of large section tunnel considering the deterioration of clay mechanical properties |
| topic | physico-mechanical properties of clay stability evaluation construction factors numerical experiment response surface method |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2023.1135276/full |
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