The results of experimental testing of a reinforced concrete culvert strengthened by a sleeving (lining) method with additional reinforcement of the inter-pipe space using a reinforcing steel cage are presented. An evaluation assessment of the stress–strain state was conducted under applied force introduction. Authors determined that the additional reinforcement enhances more optimized redistribution of stress levels between the internal liner and the external shell. As a result, stability and plasticity of the structure were enhanced. The load of the ultimate failure was 16.85 kN. The upper limit of deformations at the beginning of cracking was 5.73 mm. The complete failure attained 6.72 mm. The obtained results confirm the feasibility of using a reinforcing cage in the sleeving process as an effective means of increasing the load-bearing capacity and durability of reinforced concrete pipes, which is of practical significance for the rehabilitation and repair of road infrastructure.
Rybak et al. (Thu,) studied this question.