PSI - Issue 59

Vitalii Kovalchuk et al. / Procedia Structural Integrity 59 (2024) 360–366 Kovalchuk, Parneta & Rybak / Structural Integrity Procedia 00 (2019) 000 – 000

365

6

7,05

7,68

8,09

Fig. 6. A graphical representation of the distribution of deformations in the restored concrete pipe at the time of destruction.

The plots depicting the distribution of deformations along the pipe contour reveal uneven distribution. Notably, the maximum values of pipe deformations during both crack formation and destruction predominantly manifest in the vertical direction. The highest deformations, reaching 4.92 mm at the onset of crack formation and 8.09 mm at the point of pipe destruction, were observed at the base of the pipe. 4. Discussion The plots illustrating the distribution of pipe deformations under static loads reveal an uneven distribution around the circumference of the pipe. Maximum deformations predominantly occur in the vertical direction, with lesser deformations in the horizontal direction of the pipe. However, it is noteworthy that during the complete destruction of the pipe, the amount of deformation on the side of the pipe was 7.68 mm, surpassing the deformation at the top of the pipe, which measured 7.05 mm. Furthermore, it is important to highlight that the formation of cracks and the subsequent complete destruction of the pipe during testing, despite the reinforcement by injection technology, occurred not within the injection zone of the pipe but outside it (Fig. 7).

Crack formation at the time of pipe breaking

Bonded crack

Fig. 7. Type of crack formation at destroying a pipe.

This outcome is attributed to the robust adhesive properties of the two-component solution employed during crack injection. It substantiates the practical viability of injection technology in restoring the load-bearing capacity of pipes that are defective and damaged while in operation.