Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling
The soil arching effect induced by deep-buried shield tunneling strongly influenced the ground stress and displacement. Therefore, revealing the evolution mechanism of the soil arching effect is a prerequisite for accurately predicting the tunnel load, which has not been understood in deep-buried co...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-10-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967425000571 |
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| author | Xu Song Chang-Wei Miao Ren-Peng Chen Xiao-Ning Deng Yu Zhang Jun-Qing Wang Xiao-Fei Chen |
| author_facet | Xu Song Chang-Wei Miao Ren-Peng Chen Xiao-Ning Deng Yu Zhang Jun-Qing Wang Xiao-Fei Chen |
| author_sort | Xu Song |
| collection | DOAJ |
| description | The soil arching effect induced by deep-buried shield tunneling strongly influenced the ground stress and displacement. Therefore, revealing the evolution mechanism of the soil arching effect is a prerequisite for accurately predicting the tunnel load, which has not been understood in deep-buried conditions. Three model tests and eight numerical simulations were carried out to enhance the understanding of the soil arching evolution, in which the stress field, displacement field, and strain field were analysed. The experimental and numerical results indicated that the ground reaction curve presented a two-stage development process of an initially linear decrease followed by a gradual decrease. Compared with the theoretical tunnel loads, the measured and numerical values are relatively larger due to the loosening earth pressure theory ignoring the evolution process of the soil arching effect. The soil arching height decreases with the increase in stress level, measuring 1.75D (the initial diameter of the model tunnel), 1.65D, and 1.61D, respectively, which results from the lagging evolution of the soil arching effect under high-stress conditions. The formation of the shear band was affected by the stress-dependent dilatancy of the soil. At low stress levels, the shear band develops vertically upward. In contrast, at higher stress levels, the shear bands tilt towards the lateral side. |
| format | Article |
| id | doaj-art-de31d526e2684582825d80002c8fa1b7 |
| institution | Kabale University |
| issn | 2467-9674 |
| language | English |
| publishDate | 2025-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj-art-de31d526e2684582825d80002c8fa1b72025-08-20T03:35:02ZengKeAi Communications Co., Ltd.Underground Space2467-96742025-10-012412914110.1016/j.undsp.2025.04.002Experimental and numerical study on the soil arching effect caused by deep-buried shield tunnelingXu Song0Chang-Wei Miao1Ren-Peng Chen2Xiao-Ning Deng3Yu Zhang4Jun-Qing Wang5Xiao-Fei Chen6China Nuclear Industry Survey Design & Research Co., Ltd., Zhengzhou 450000, ChinaChina Nuclear Industry Survey Design & Research Co., Ltd., Zhengzhou 450000, ChinaHunan Provincial Engineering Research Center for Advanced Technology and Intelligent Equipment for Underground Space Development, Hunan University, Changsha 410082, China; College of Civil Engineering, Hunan University, Changsha 410082, China; Corresponding author at: College of Civil Engineering, Hunan University, Changsha 410082, China.China Nuclear Industry Survey Design & Research Co., Ltd., Zhengzhou 450000, ChinaChina Nuclear Industry Survey Design & Research Co., Ltd., Zhengzhou 450000, ChinaChina Nuclear Industry Survey Design & Research Co., Ltd., Zhengzhou 450000, ChinaChina Nuclear Industry Survey Design & Research Co., Ltd., Zhengzhou 450000, ChinaThe soil arching effect induced by deep-buried shield tunneling strongly influenced the ground stress and displacement. Therefore, revealing the evolution mechanism of the soil arching effect is a prerequisite for accurately predicting the tunnel load, which has not been understood in deep-buried conditions. Three model tests and eight numerical simulations were carried out to enhance the understanding of the soil arching evolution, in which the stress field, displacement field, and strain field were analysed. The experimental and numerical results indicated that the ground reaction curve presented a two-stage development process of an initially linear decrease followed by a gradual decrease. Compared with the theoretical tunnel loads, the measured and numerical values are relatively larger due to the loosening earth pressure theory ignoring the evolution process of the soil arching effect. The soil arching height decreases with the increase in stress level, measuring 1.75D (the initial diameter of the model tunnel), 1.65D, and 1.61D, respectively, which results from the lagging evolution of the soil arching effect under high-stress conditions. The formation of the shear band was affected by the stress-dependent dilatancy of the soil. At low stress levels, the shear band develops vertically upward. In contrast, at higher stress levels, the shear bands tilt towards the lateral side.http://www.sciencedirect.com/science/article/pii/S2467967425000571Soil arching effectGround reaction curveModel testNumerical simulationDeep-buried shield tunnel |
| spellingShingle | Xu Song Chang-Wei Miao Ren-Peng Chen Xiao-Ning Deng Yu Zhang Jun-Qing Wang Xiao-Fei Chen Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling Underground Space Soil arching effect Ground reaction curve Model test Numerical simulation Deep-buried shield tunnel |
| title | Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling |
| title_full | Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling |
| title_fullStr | Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling |
| title_full_unstemmed | Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling |
| title_short | Experimental and numerical study on the soil arching effect caused by deep-buried shield tunneling |
| title_sort | experimental and numerical study on the soil arching effect caused by deep buried shield tunneling |
| topic | Soil arching effect Ground reaction curve Model test Numerical simulation Deep-buried shield tunnel |
| url | http://www.sciencedirect.com/science/article/pii/S2467967425000571 |
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