Why More And More Carbon Fiber Sheet Applied in Subway Engineering?

  With the development of economy and social life, the urban transportation becomes more and more convenient. In such case, the build, operation and maintenance of subway become increasingly important. While during operation, differential settlements happened in the subway tunnels which are built on soft soil areas will result in bending deflection of tunnels, which will give rise to expansion on tunnel seam and breakage on tunnel segment. As a result, tunnel segment leakage will directly lead to the security of transporting subway. Therefore, it is necessary to make effective restoration and reinforcement to improve the strength and stress state of tunnel segment, which can control the leakage status and then ensure the security of tunnel thereby.

  1.Preeminent mechanical property can be applied in structural reinforcement of various types, such as bending resistance, shearing resistance, compression resistance, anti-fatigue, seismic resistance, wind resistance, control on the expansion of crack and deflection and increase in structural ductility.

  2. Excellent chemical stability make reinforced and restored structures possess fortissimo capacity of acid, alkali, salt and ultraviolet ray resistance and waterproof. Besides, they can also adapt to temperature changes.

  3. Light self weight won’t add structural dimension, and the low weight can be neglected which is the big difference from traditional reinforcement methods.

  4. Easy construction can be done by using small electric power tools, even in limited construction area where construction can’t be done by traditional technology. What’s more, it also abounds in short construction period, and can be operated in consistently transporting and vibrating areas.

Mankate carbon fiber sheet reinforcement conducted on-the-spot

  The principle of carbon fiber sheet reinforcement:

Carbon fiber sheet abounds in preeminent mechanical property, whose strength is dozen times stronger than steels. While when carbon fiber filaments are weaved into carbon fiber sheets, it is hard for these filaments to work together. When they suffer low load capacity, a part of them with Higher stress level will achieve its maximum tensile strength quicker than others and then quit its working status. By that analogy, carbon fiber filaments break gradually till whole filaments are damaged. While by using adhesive, it will ensure every carbon fiber filament to work together and carbon fiber to work together with construction structures, and finally reinforcement can be fulfilled. 

Mankate Carbon fiber sheet used in Shenzhen subway tunnel

  In the restoration on tunnel, as for damaged tunnel segment, carbon fiber sheet and adhesive working together will improve tunnel segment’s mechanical property and ductility and effectively control the expansion of crack. In addition, adhesive itself can transmit shearing strength during the load-bearing process of tunnel segment, which enables carbon fiber to make good use of its high strength and higher load-bearing potential.

  After reading the above information, you may have a better understanding about the reason why more and more carbon fiber sheet us widely used in subway reinforcement. In practical construction, you need pay attention to every detail to ensure carbon fiber sheet to make full use of its reinforcement effect, and enhance the load capacity of tunnel segment. If you are interested in carbon fiber sheet and want to buy one, you can click here（What Are Carbon Fiber Sheet’s Usage In Architectural Reinforcement?. Hope you can have a good time!

                                              Editor: NJMKT

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