Municipal bridges, as vital infrastructure for urban transportation, their safe operation is directly related to the stable development of society and economy. However, with the increase in service life and traffic load, bridge piers, as main load-bearing components, often face problems such as steel bar corrosion, concrete deterioration, and insufficient bearing capacity, which pose a serious threat to the service life of bridges. Therefore, carrying out pier strengthening and maintenance work has become an important part of bridge maintenance. To ensure the effectiveness of bridge pier strengthening and maintenance, it is necessary to conduct in-depth analysis of relevant construction technologies, providing solid technical support for pier strengthening and maintenance. This article first introduces the principles of construction technology for strengthening and maintenance of municipal bridge piers.
Due to the complexity and particularity of municipal bridges, the strengthening of their piers must be handled with extra caution. In specific implementation, it is first necessary to fully grasp the relevant technical principles and conduct in-depth analysis of the characteristics of different technical types, so as to select the most appropriate solutions, achieve the goal of pier repair, and ensure the safety and stability of the structure. When the pier is displaced, the first step in strengthening construction is to carry out drilling. Usually, drilling is done at the bottom of the old pier to provide necessary conditions for subsequent steel plate installation. Then, steel plates are installed around the pier to significantly improve its bending resistance. While installing the steel plates, steel frame structures need to be arranged on both sides of the pier. However, the steel frame structures are not of a uniform specification; instead, different types are selected according to the actual conditions of the pier to maximize the supporting effect. Next, the steel hoop formwork is installed in place, and concrete pouring is completed to enhance the compressive and bending resistance of the pier, effectively improve the overall stress state of the pier, and thus achieve the ideal strengthening effect.
In municipal bridge construction, large-diameter pile foundations are often used as the main foundation support structure. This design has the advantage of providing higher bearing capacity, adapting to the load requirements of high-traffic flow on bridges. However, if operational errors occur during pier strengthening, it will not only weaken the structural stability but also cause the bridge to tilt or even collapse. Therefore, during pier strengthening construction, it is necessary to fully consider the connection between the column and the foundation to ensure mechanical coordination between various components. During the construction process, close attention should also be paid to pier displacement. If displacement is found, corrective measures should be taken immediately to avoid affecting the appearance integrity of the bridge and reducing its performance. In addition, due to the complexity of the construction environment, the causes and manifestations of pier displacement also vary. Before construction, technicians should conduct a comprehensive investigation and analysis, and in-depth consideration should be given to foundation conditions, construction technology, and material selection to ensure that each operation can specifically solve problems and improve structural performance.
To sum up, the principles of construction technology for strengthening and maintenance of municipal bridge piers are the core foundation for ensuring the scientific and efficient implementation of strengthening work. From fully grasping technical points and analyzing the characteristics of different technologies to taking steps such as drilling, installing steel plates and frames, and pouring concrete for problems like pier displacement, every link relies on the accurate control of principles such as mechanical coordination and structural stability. Only by deeply understanding and following these principles can appropriate solutions be formulated in complex construction environments, providing reliable guarantees for the safety and stability of piers.
In the next article, we will specifically introduce four construction technology methods for strengthening and maintenance of municipal bridge piers. Through detailed explanations of the operation process, applicable scenarios, and advantages of each method, we will provide more targeted technical references for practical construction, helping to improve the quality and efficiency of strengthening and maintenance of municipal bridge piers.