Buildings, Vol. 15, Pages 3003: Case Study of PLC Synchronous Lifting Technology in Concrete Column Reinforcement: Design, Construction, and Monitoring

Buildings doi: 10.3390/buildings15173003

Authors:
Baozhong Wang
Sijia Qian
Sabiu Muhammad
Mengqi Xu
Zhengke Shao
Na Li
Erlu Wu

Traditional support methods, such as full-frame scaffolding, often pose significant safety risks during the replacement of defective concrete. In contrast, the application of programmable logic controller (PLC) synchronous jacking technology combined with an encircling beam is an innovative approach to concrete replacement. However, there is currently a lack of effective theoretical guidance for determining its design parameters, and there are also few measured data available to verify its effectiveness. To address this issue, this study investigates a concrete structure in which it was discovered, during the topping-out phase, that the compressive strength of several load-bearing columns did not meet the design specifications. Through structural analysis and load calculations, a reinforcement scheme utilizing the synchronous jacking system in conjunction with an encircling beam was proposed to replace the defective concrete. The monitoring of the settlement and deformation during the replacement process revealed a minimal settlement of 0.45 mm, which is approximately 23% of the predefined warning threshold. The results demonstrate that the integration of the synchronous jacking system with an encircling beam offers a safe and reliable solution, thus providing an effective approach to addressing similar challenges in concrete structural reinforcement.

Source link

Baozhong Wang www.mdpi.com