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Study of the Concrete Lining Cracking Affected by Adjacent Tunnel and Oblique Bedded Rock Mass
https://orcid.org/http://orcid.org/0000-0002-5905-5175
In this paper, a case study of a newly built tunnel is executed to perform a health condition assessment combining field investigation and numerical simulation techniques. The damaging behaviors were observed around the sidewall regions in this newly built tunnel, and the adjacent tunnel and oblique bedded rock mass are considered as the inducements of the damaging behaviors based on field investigation. Three different sets are implemented for ensuring the correctness of the inducements based on numerical simulation method. Among them, adjacent tunnel, oblique bedded rock mass and the combination of these two inducements are considered separately in different models. For assessing the health conditions of the concrete lining, safety factors of compressive strength Kc and tensile strength Kt are calculated. According to the numerical results, the existence of adjacent tunnel may lead to the instability of the sidewall regions, and the tilted stratum will exacerbate the situation. The numerical results are in accordance with the actual cracking behavior of tunnel lining, which demonstrates the influence of the adjacent tunnel and oblique bedded rock mass play important roles in the stability of this tunnel structure. In addition, the study can provide the design basis for the following maintenance work.
Study of the Concrete Lining Cracking Affected by Adjacent Tunnel and Oblique Bedded Rock Mass
https://orcid.org/http://orcid.org/0000-0002-5905-5175
In this paper, a case study of a newly built tunnel is executed to perform a health condition assessment combining field investigation and numerical simulation techniques. The damaging behaviors were observed around the sidewall regions in this newly built tunnel, and the adjacent tunnel and oblique bedded rock mass are considered as the inducements of the damaging behaviors based on field investigation. Three different sets are implemented for ensuring the correctness of the inducements based on numerical simulation method. Among them, adjacent tunnel, oblique bedded rock mass and the combination of these two inducements are considered separately in different models. For assessing the health conditions of the concrete lining, safety factors of compressive strength Kc and tensile strength Kt are calculated. According to the numerical results, the existence of adjacent tunnel may lead to the instability of the sidewall regions, and the tilted stratum will exacerbate the situation. The numerical results are in accordance with the actual cracking behavior of tunnel lining, which demonstrates the influence of the adjacent tunnel and oblique bedded rock mass play important roles in the stability of this tunnel structure. In addition, the study can provide the design basis for the following maintenance work.
Study of the Concrete Lining Cracking Affected by Adjacent Tunnel and Oblique Bedded Rock Mass
https://orcid.org/http://orcid.org/0000-0002-5905-5175
In this paper, a case study of a newly built tunnel is executed to perform a health condition assessment combining field investigation and numerical simulation techniques. The damaging behaviors were observed around the sidewall regions in this newly built tunnel, and the adjacent tunnel and oblique bedded rock mass are considered as the inducements of the damaging behaviors based on field investigation. Three different sets are implemented for ensuring the correctness of the inducements based on numerical simulation method. Among them, adjacent tunnel, oblique bedded rock mass and the combination of these two inducements are considered separately in different models. For assessing the health conditions of the concrete lining, safety factors of compressive strength Kc and tensile strength Kt are calculated. According to the numerical results, the existence of adjacent tunnel may lead to the instability of the sidewall regions, and the tilted stratum will exacerbate the situation. The numerical results are in accordance with the actual cracking behavior of tunnel lining, which demonstrates the influence of the adjacent tunnel and oblique bedded rock mass play important roles in the stability of this tunnel structure. In addition, the study can provide the design basis for the following maintenance work.
Study of the Concrete Lining Cracking Affected by Adjacent Tunnel and Oblique Bedded Rock Mass
Iran J Sci Technol Trans Civ Eng
Zhao, Yiding (author) / Shi, Yao (author) / Yang, Junsheng (author)
2021-12-01
8 pages
Article (Journal)
Electronic Resource
English
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