• Building Reinforcement Plan

Building reinforcement plan

Comprehensive solution for house fire repair

For carbon fiber reinforcement, before using carbon fiber materials, first confirm that the paste surface is dry. When the temperature is above -10°C and the relative humidity is RH&85%, no construction is allowed without effective measures. In order to prevent carbon fiber from being damaged, during the transportation, storage, cutting and pasting of carbon fiber materials. Use a steel ruler and a wallpaper knife to cut off the carbon fiber material according to the specified size, and the length of each section is generally not more than 6m. In order to prevent the materials from being damaged during the storage process, the cutting quantity of the materials should be based on the cutting amount of the day. Carbon fiber longitudinal joints must be overlapped by more than 20cm. This part should be coated with more resin, and the carbon fiber does not need to be overlapped horizontally.
The main agent, curing accelerator and curing agent of the paste resin should be accurately weighed according to the specified ratio, put into a container, and stir evenly with a stirrer. The one-time blending amount should be used up within the usable time.
Try not to have air between the carbon fiber and the resin. Rollers (special tools) can be used to roll the carbon fiber material several times along the fiber direction to impregnate the resin into the carbon fiber.
After the carbon fiber material is pasted, it needs to be cured naturally for 1-2 hours to achieve the initial curing. It should be ensured that it will not be disturbed and bumped by the outside during the curing period.
If fireproofing is required for reinforcement components, fire-resistant coating can be applied after the resin is cured. The coating should be carried out after the initial curing of the resin, and the relevant standards and construction regulations of the coating used should be followed.

Anti-corrosion and anti-carbonation solutions for concrete structures

The Twelfth National Academic Exchange Conference on Building Inspection, Appraisal and Reinforcement pointed out that at this stage, my country is gradually entering the era of new construction and existing construction maintenance and renovation. On the one hand, the scale of new construction is still huge; on the other hand, the scale of existing construction projects is even larger. With the strong implementation of national energy conservation and environmental protection policies, more and more stock construction projects are facing maintenance, renovation and function improvement.
From the data fed back by the building structure reinforcement and transformation industry in 2012, the reporter analyzed that there are more and more building structure reinforcement and transformation companies in recent years. Basically, the density of building structure reinforcement and transformation companies distributed in the industry is higher than in previous years. About 20% more. This is a happy situation, because it means that my country's building structure reinforcement and transformation industry is developing towards a more ambitious prospect, and the industry has become prosperous. Still, some of these experts are concerned.
Because everyone knows that the market space in a region is limited, and it is impossible to accommodate countless investors in the same period; more and more people invest in building structure reinforcement and transformation, and the number of building structure reinforcement and transformation companies is increasing significantly. This will expand the capacity of the market infinitely, and at the same time, it will also significantly improve the state of competition within the entire industry. Some small building structure reinforcement and transformation companies may face greater pressure, because they must develop some better solutions as soon as possible to resist the attacks of some large companies, otherwise they will not be able to continue to survive in the market.
Some relevant experts pointed out that the increase in competition in the industry has demonstrated the strong market demand capability of the building structure reinforcement and transformation industry; however, the mechanism of survival of the fittest will become more and more obvious during this period. In this process, there will be more services. It is an inevitable law of the market that some small companies will be replaced by the emergence of high-end large companies. As an enterprise, what needs to be done is to adapt to this trend and face the challenges.

Comprehensive solution for house space change

The development of the modern construction industry can be divided into three stages. The first stage is the period of large-scale new construction. The building in this period is characterized by large scale but low standards. In the first stage, new buildings are constantly being built, and the old buildings need to be repaired and reinforced; the third stage is a period focusing on modernization and reinforcement. Due to the high cost of demolition and construction and the serious impact on the order of life and production and the environment, a new round of construction is hindered. The climax of new construction has made the continuous development of modern reinforcement with quick results and low investment. By 1990, the investment in building maintenance and reinforcement in the United States accounted for about 50% of the total construction investment, 70% in the United Kingdom, and 80% in Germany. In my country, statistical data show that during the "First Five-Year Plan" period, the funds used for renovation were only equivalent to 4.2% of the capital construction investment in the same period, while during the "Third Five-Year Plan" it reached 27%, during the "Fourth Five-Year Plan" it was 31.7%, and during the "Seventh Five-Year Plan" it was 31.7%. During the period, it increased to 54%. It can be seen from the changes in the data that the country's expenses for the maintenance and reinforcement of old buildings will gradually increase, especially for industrial buildings.

Industrial plants are the basic facilities for production. Most of the plants built in the early days of the founding of the People’s Republic of China have gradually entered the aging period, which has seriously hindered the progress of production and limited the development of production. Due to the high cost of factory demolition and construction, these old plants are still in use. However, there are safety problems in most of the factories, such as injuries caused by falling large pieces of concrete. According to statistics, reconstruction can save 40% compared with new construction, shorten the construction period by about 50%, and recover investment 3 to 4 times faster than new construction [1]. In order to maintain normal production, save resources, and promote the rapid development of the national economy, structural reinforcement of old industrial plants has increasingly become a research hotspot in the field of civil engineering.
1 Main safety problems existing in old industrial plants After investigation and research and consulting relevant literature, it is found that the main safety problems in old factory buildings are as follows:
① When designing, pay attention to saving, its bearing capacity is less, and the structural safety factor is smaller;
②Due to the limitation of construction conditions at that time, the strength of poured concrete often cannot reach the design strength, or the strength is highly discrete, which further reduces the safety factor of the structure;
③ During the long-term use of concrete components, due to serious weathering and damage, the effective cross-sectional area of the components is reduced, and the exposed bars and steel bars are corroded, which eventually reduces the bearing capacity of the components;
④ Corrosion of steel structure components and connectors seriously affects the bearing capacity of the structure;
⑤During use, the structural bearing capacity cannot meet the requirements due to changes in the actual load relative to the design load (such as an increase in the lifting capacity of the crane);
⑥Concrete roof slabs are severely weathered, causing exposed reinforcement and concrete blocks to fall;
⑦ The bearing capacity of the foundation does not meet the requirements, causing the foundation to sink and the house to crack;
⑧ Cracking of enclosure brick wall due to temperature stress;
⑨Because the cross-section of the steel crane beam is too small, it will cause excessive vibration when the crane is running, which will affect the normal use of the crane.

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