As a hydraulic construction technician, do you also feel a headache about controlling the concrete protective layer? If the protective layer is left too large, it may cause the concrete to have no reinforcement and be prone to cracks.
If the protective layer is too small, it may cause the steel bars to develop and even expose, seriously affecting the appearance quality of the concrete.
In severe cases, it may even need to be dismantled and rebuilt, resulting in heavy losses.
The author summarizes some control measures for tunnel lining protection layer for your reference.
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