Foundation reinforcement processing technology

In general practice, the problem often occurs in the main girder part of the old bridge. At this time, the reinforcement method that should be adopted is to set up cantilever beams. The correct area must be grasped when setting, usually on the upper side of the top of the pier. Because there are two holes in this area, and there is sufficient space between their ends, the setting of the beam is more suitable. According to modern bridge strengthening treatment technology, the type of cantilever beam is determined. The cantilever beam of the main beam of the old bridge mentioned here is preferably cast-in-place transverse cantilever type. The micro-bending plate must be prefabricated in advance so that it can be correctly installed on the cantilever beam. Through practical experience, it can be known that when quality problems occur in the old bridge, the most common damage is the bridge deck, and the reinforcement of this part depends on the cast-in-place operation. The problem can be solved by widening the bridge deck and paving. Of course, another important content in this link is the choice of steel mesh. The steel mesh is generally set on the pavement and widened parts of the bridge deck to improve the quality of the bridge as a whole. In order to ensure that the reinforcement treatment meets the requirements, it is best to install bridge expansion joints in the center of the bridge.

Broaden and strengthen processing technology

The process of widening and strengthening is relatively complicated, because it is generally necessary to consider the passage of vehicles and pedestrians during the strengthening period. Therefore, it is necessary to cooperate with the transportation department to carry out traffic control, so as to achieve the effect of opening to traffic while constructing, ensuring people's normal life and ensuring the progress of construction. The widening and strengthening of the bridge deck needs to make full use of the existing bridge parts, such as the piers of the old bridge, so that not only the widening and strengthening parts can be coordinated with the bridge as a whole, but also the cost of widening and strengthening treatment can be saved. Widening and strengthening treatment This technology needs to pay attention to various parameters of the bridge during the application process to ensure that the overall performance of the bridge after the completion of the widening and strengthening is improved rather than reduced. At present, the main problem of widening and strengthening this technology is to ensure the normal passage and safety of vehicles and pedestrians. For this reason, clear signs should be set in specific operations to prevent interference factors that affect the broadening and strengthening processing. With the improvement of people's living standards in modern society, people have higher requirements for the urban environment. As one of the road traffic infrastructure, bridges must not only have good use value, but also have a certain ornamental value. Therefore, in the process of widening and strengthening, we must grasp the whole of the bridge, so that the widened and reinforced part and the bridge still maintain a high degree of coordination, making it more beautiful.

Steel plate paste reinforcement

Steel plate paste reinforcement is one of the most demanding bridge reinforcement technologies. Before applying this technology, the specific load value of the steel plate must be calculated. In this process, the steel plate must be used as the steel bar section, so that the load of the steel bar section can be calculated smoothly. In order to ensure the quality of steel plate sticking and reinforcement, professional technicians should be arranged to prevent errors. In the process of steel plate pasting construction, adequate preparations should be made. Highway bridges should be inspected in advance to master various parameters so as to determine the size of the steel plate. According to practical experience, it is best to choose thinner and wide steel plates in bridge reinforcement. Generally, thinner steel plates have good elasticity, and wider steel plates can meet the basic reinforcement requirements. The thickness of the steel plate should be related to the calculated thickness, and the former is usually required to be greater than the latter, in order to ensure the bearing capacity of the steel plate itself, so that it can play a role in strengthening treatment.

Chemical grouting method and chisel groove inserting method

Through practical investigation, it can be known that chemical grouting method and chiseling groove embedding method are relatively common methods in the treatment of bridge cracks. This method is not only simple to operate, but also can ensure the effect of reinforcement. Crack treatment is the most common construction technology in roads and bridges, and grouting is more commonly used. Before formal construction, it is necessary to determine the crack treatment plan based on the information and data obtained in advance. Generally, it is required to grasp the actual size and other parameters of the cracks, and on this basis, more objective treatment measures can be formed. Usually in the bridge reinforcement treatment, if the crack exists and the width of the crack is less than 0.3mm, or the crack occurs on the surface of the bridge, then closed treatment measures can be selected, so that the treatment is more suitable. For those cracks whose actual width is greater than 0.3mm but less than 0.5mm, it is more necessary to use the chiseling method to achieve the purpose of reinforcement. In practice, the selection of grouting materials is very important, not only requires complete grouting materials, but also makes the ratio of material ingredients scientific and reasonable to ensure the quality after grouting treatment. Common grouting materials include cement mortar and grout, in addition to epoxy resins and methacrylates.

Increase the component section

Different situations should choose different reinforcement methods. As far as the bridge is concerned, the actual situation of the bridge must be fully considered to achieve the purpose of reinforcement. For example, the reinforcement technology of increasing the cross-section of the component is more suitable for improving the strength, rigidity and stability of the bridge. Because some bridges are in use, the load of vehicles is too large. This will cause the internal structure of the bridge to change for a long time, and many failures will occur, which poses a huge threat to the safety of pedestrians and vehicles. This type of problem is very common in infrastructure such as bridges, and the occurrence of such problems can be effectively reduced by increasing the section of the component. Specifically, increasing the section of a member is aimed at prestressed concrete bending members, reinforced concrete tensile members, etc. From the perspective of construction technology, it is mainly through adding main reinforcement at the bottom of the bridge and the side of the beam to increase the cross-section of the member, and then achieve the effect of enhancing the bending strength of the bridge. In this way, the bearing capacity of the bridge itself can be maximized, which has a very obvious effect on extending the service life of the bridge. By analyzing the reinforcement technology of increasing the component section, it is found that it is simpler in operation and more widely used. However, in practice, the application of increasing the cross-section of the component to solve the bridge problem should also take into account the deficiencies of the technology itself. For example, the self-weight of the bridge has increased after application, and it exhibits greater corrosion resistance. In order to apply the reinforcement technology of increasing the component section more scientifically, technicians should be arranged in advance to test the actual components of the bridge and grasp the overall performance of the actual components, so as to ensure that the bearing capacity of the bridge remains unchanged or increased after the final increase of the component section. During the specific construction process, the technical staff should guide the construction staff to complete the welding of the steel reinforcement steel plate. The steel reinforcement steel plate referred to here includes the steel reinforcement steel plate implanted and the steel reinforcement steel plate in the original structure. Only when this link meets the requirements will the overall performance of the bridge be improved. It will be more in line with expectations in terms of bearing capacity and pressure resistance, which is of great significance for improving the operational safety of roads and bridges.

Bridge deck renovation

The economic development speed of modern society is getting faster and faster, and the number of vehicles is increasing, especially large and heavy vehicles. This type of vehicle puts a lot of pressure on the bridge during operation, which leads to the continuous emergence of some road and bridge safety problems, which affects the safety and stability of the road and bridge. In order to ensure the safety of people's travel, the bridge should be strengthened. In daily routines, we must regularly inspect highways and bridges, grasp the actual conditions of the bridges, and formulate clear reinforcement measures based on specific needs. The comprehensive benefits of highway bridge operation are directly related to the overall performance of the bridge, for which it is necessary to take active remediation measures. The reinforcement treatment technology mentioned above has higher requirements and higher technical content than the reinforcement treatment technology of bridge deck renovation. The bridge deck renovation is a comprehensive reinforcement treatment method. Because the interface of the bridge is a problem-prone area during use, comprehensive remediation technology is very important, which is of great significance for improving the overall quality of the bridge. Specifically speaking, in the construction of bridge deck renovation, the most important thing is to treat the original base layer of the bridge, and remove those things that affect the overall performance of the bridge. Carry out cement paving work according to the specific conditions of the bridge interface. The quality of the selected cement must meet the standard, and the mixing method must be scientific and reasonable to ensure the quality of the bridge deck cement after paving and the bridge. The bridge base layer formed in this way is very useful for ensuring the safety of vehicles on the bridge. In addition, the reinforced concrete should be poured for the bridge deck, so that the overall quality of the bridge deck can be improved. Through practical investigations, it is found that scientific bridge deck renovation can effectively reduce the probability of bridge deck damage, which is of great significance for comprehensively improving the use value of the bridge.

Conclusion

The speed of economic development is getting faster and faster. In the future, road transportation and other infrastructure will become more and more perfect, which will promote economic development. As bridges are currently the focus of attention from all walks of life, the application of reinforcement technology is also more scientific. Reinforcement methods such as steel plate sticking reinforcement, chemical grouting and chisel-grooving method are still insufficient in practical applications, which are related to my country's current construction level and technical level. Therefore, if we want to improve the overall quality of bridges in our country in practice, we must not only speed up the research and development and update of technology, but also improve the level of technology application. Relevant personnel in our country should actively absorb new technology and experience, discover the shortcomings in my country's current bridge construction technology, and continuously improve the level of infrastructure construction in my country.