Research and application of a new technology for tunnel disease treatment
Yuming Zhang
Engineering Department, China Railway Nanning Bureau Group Co., Ltd.
Rui Li
CHN Energy Baoshen Railway Limitted Liality Company Group Co., Ltd
DOI: https://doi.org/10.59429/esta.v11i4.8461
Keywords: Tunnel diseases; Special concrete; New technology; Maintenance and reinforcement
Abstract
In view of the problems of poor maintenance effect and repeated occurrence of diseases in the existing tunnel disease treatment technologies, this paper analyzes the current situation of tunnel construction in China. By adhering high-mechanical-performance and high-durability high-performance concrete to the existing concrete secondary lining, a complete and brand-new lining structure is formed. This structure closely adheres to the existing lining to form a composite lining structure that can bear loads together, which can significantly improve the mechanical characteristics of the lining structure and enhance the stability of the surrounding rock. The results of engineering application show that the compressive strength of specimens cured under the same conditions at the construction site reaches 110.4 MPa at 7 days, and the flexural strength reaches 16.9 MPa, far exceeding the design strength. This method has simple construction procedures, low cost, and strong applicability for the treatment of various tunnel diseases.
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