Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China
Loess is a kind of special soil with structure and hydrocollapse behavior; due to the particularity of loess, the deformation regularity of the tunnel in loess shows different characteristics from those in rock. To ensure the safety of construction, crown settlement (CS) and horizontal convergence (...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/2706976 |
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| _version_ | 1832561907581583360 |
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| author | Zhao Hu Ke Du Jinxing Lai Yongli Xie |
| author_facet | Zhao Hu Ke Du Jinxing Lai Yongli Xie |
| author_sort | Zhao Hu |
| collection | DOAJ |
| description | Loess is a kind of special soil with structure and hydrocollapse behavior; due to the particularity of loess, the deformation regularity of the tunnel in loess shows different characteristics from those in rock. To ensure the safety of construction, crown settlement (CS) and horizontal convergence (HC) are widely used to assess the stability of the tunnel structural system. Based on statistical analysis, this study focused on analyzing the influence of cover depth on the deformation of surrounding rock of loess tunnels by ANOVA, and relationships between them were presented by regression analysis. The achieved results indicated that the influence of cover depth on deformation was not obvious in shallow tunnels, while the cover depth had a significant effect on deformation in deep tunnels. Based on the difference of influence of cover depth on deformation between shallow tunnels and deep tunnels, a method for determining the cover depth threshold (CDT) in the tunnel by statistical analysis was proposed. The horizontal and vertical deformations in shallow tunnels were discrete and obeyed the positive distribution, mainly concentrated within 200 mm. The deformation allowance in shallow tunnels was recommended to be 200 mm. In deep tunnels, as the cover depth increased, the deformation increased linearly, while the CS/HC decreased. |
| format | Article |
| id | doaj-art-41bedab146db41ad8d29fcda3bce2b44 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-41bedab146db41ad8d29fcda3bce2b442025-02-03T01:23:53ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/27069762706976Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW ChinaZhao Hu0Ke Du1Jinxing Lai2Yongli Xie3School of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaSchool of Highway, Chang’an University, Xi’an 710064, ChinaLoess is a kind of special soil with structure and hydrocollapse behavior; due to the particularity of loess, the deformation regularity of the tunnel in loess shows different characteristics from those in rock. To ensure the safety of construction, crown settlement (CS) and horizontal convergence (HC) are widely used to assess the stability of the tunnel structural system. Based on statistical analysis, this study focused on analyzing the influence of cover depth on the deformation of surrounding rock of loess tunnels by ANOVA, and relationships between them were presented by regression analysis. The achieved results indicated that the influence of cover depth on deformation was not obvious in shallow tunnels, while the cover depth had a significant effect on deformation in deep tunnels. Based on the difference of influence of cover depth on deformation between shallow tunnels and deep tunnels, a method for determining the cover depth threshold (CDT) in the tunnel by statistical analysis was proposed. The horizontal and vertical deformations in shallow tunnels were discrete and obeyed the positive distribution, mainly concentrated within 200 mm. The deformation allowance in shallow tunnels was recommended to be 200 mm. In deep tunnels, as the cover depth increased, the deformation increased linearly, while the CS/HC decreased.http://dx.doi.org/10.1155/2019/2706976 |
| spellingShingle | Zhao Hu Ke Du Jinxing Lai Yongli Xie Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China Advances in Civil Engineering |
| title | Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China |
| title_full | Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China |
| title_fullStr | Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China |
| title_full_unstemmed | Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China |
| title_short | Statistical Analysis of Influence of Cover Depth on Loess Tunnel Deformation in NW China |
| title_sort | statistical analysis of influence of cover depth on loess tunnel deformation in nw china |
| url | http://dx.doi.org/10.1155/2019/2706976 |
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