Prestressing technology has been widely applied in road and bridge construction projects. To further improve the application results of this construction technology, it is necessary to identify existing problems in its technical application, summarize construction experience, and explore key aspects of applying prestressing force in road and bridge construction. Improving the quality of road and bridge projects, extending the service life of roads and bridges, and ensuring the stability of road and bridge usage continuously.

1. Advantages of Prestressing Technology

When the prestressing technology is applied to key parts of roads and bridges, it can significantly improve the quality of the building facilities. This can minimize the input of various construction materials, such as concrete. In addition, it can better reduce its own weight, avoid problems such as cracking of the building facilities, continuously improve the ability to resist water penetration, increase the stiffness value of the building, reduce the loss of various costs, improve the economic benefits of the final construction project, optimize the original road and bridge structure, extend the service life of roads and bridges, and make the use of this technology safer, using prestressing technology to better make up various defects of traditional technologies.

2. Key Points of Applying Prestressing Force in Road and Bridge Construction

2.1 Reinforced Concrete Structure and Pavement

The pavement is a crucial link in road and bridge construction. Applying prestressing technology in the construction process of road and bridge pavements can improve the stability of the engineering project. To further improve the technical level of prestressing force, it is necessary to conduct a comprehensive survey of the construction environment before starting construction activities, analyze the geological and hydrological conditions of the area, compile various parameter reports, and monitor traffic conditions in the area. Based on the collected data and information, compile a more comprehensive construction planning scheme to enhance the quality of road and bridge pavements. Essentially, the principle of integrating prestressing technology into concrete pavements is similar to that of applying it to reinforced concrete structures. By applying pressure to the areas under pressure, cracks in roads and bridges can be prevented.

2.2 Road and Bridge Strengthening

In the construction of reinforced concrete structures, cracking is a common issue, particularly in road and bridge projects where the frequency of cracking problems is high. During construction, the use of prestressing technology by construction units is of great importance. The use of prestressing technology can better reduce the frequency of cracking problems and reduce the interval of cracks.

3. Problems and Solutions in Road and Bridge Prestressing Construction

3.1 Blockage of Reinforcing Steel Ducts

The problem of blockage of reinforcing steel ducts occurs frequently. Once the blockage of reinforcing steel ducts occurs during the construction of the road and bridge, it will negatively impact the measured parameters and make it more difficult to deal with this problem. The bridge simply cannot meet the necessary standards. Therefore, during the construction process, attention should be paid to the problem of blockage of reinforcing steel ducts and construction should be carried out strictly in accordance with relevant standard specifications, and the ducts should be properly installed and the positions of the ducts should be determined.

3.2 Problems of Excessive Length or Poor Control

The frequency of tensioning technology in prestressing technology is relatively high. If the actual span exceeds 30m, the construction form of symmetrical tensioning at both ends will be used. If attention is not paid to this aspect, cracks will occur in the bridge due to the large pressure it receives. During the construction process, there are numerous challenges that need to be addressed. For example, if the tensioning force is not controlled well, the tensioning forces in all parts of the bridge will be different, which will significantly impact the overall performance of the bridge. Once the bridge is put into use, it will cause many safety problems. Hence, it is crucial for construction personnel to prioritize the control problem of the bridge. It can not only increase the safety of the bridge but also ensure the high-quality completion of the project.

3.3 Cracking Problems Before Tensioning

Under normal circumstances, reinforced concrete tends to shrink during road and bridge construction projects. When reinforced concrete is combined with the influence of the natural environment, after all the reinforced concrete links, there will be serious cracking problems. Particularly in large-scale engineering projects, before tensioning or cracking occurs in the prestressing structure, it will severely impact the overall performance of the bridge. To address this kind of cracking, first, construction personnel need to thoroughly inspect the cracks to determine the severity of the cracks and so on. Through investigation, it is found that the number of cracks before tensioning is usually relatively large and there is challenging to repair them. Enterprises must invest more manpower, material resources, and financial resources. To solve this kind of problem, the best solution for the construction process is for construction personnel to choose prestressing technology.

3.4 Problems with Large Shrinkage Changes

Although prestressing technology is a common technical method in road and bridge construction, if the bridge does not adapt to this technology, the concrete pavement will shrink. If the concrete pavement experiences shrinkage problems, it will be the reason for the decline in the overall bearing capacity of the bridge, which will in turn affect the quality level of the entire project. Based on the shrinkage change problem, the best solution is that during the operation process, construction personnel can add admixtures, choose concrete materials with higher setting strength and lower water-cement ratio for construction, prevent concrete pavement from experiencing shrinkage problems, and also improve the safety performance of the bridge. The temperature difference between the inside and outside of the components should be controlled.

Conclusion

According to the article's content, prestressing force plays a crucial role in road and bridge construction projects. Construction units should promptly conduct surveys of roads and bridges, understand the current construction situation, face various construction problems directly, find corresponding solutions, use proper prestressing technology, conduct in-depth research on prestressing technology, and further promote the development of the road and bridge construction process.