China FAMOUS Steel Engineering Company Company News

Steel-structured dwelling houses are houses in the process of construction. Most of the structures are produced in the factory and assembled at the construction site. Therefore, in actual use, the quality of the houses can be guaranteed, and energy consumption can be reduced, and dust on the construction site can be reduced. This energy-saving and environmentally friendly construction mode will be the development direction of the future building. The General Office of the Ministry of Housing and Urban-Rural Development recently issued a reply on the approval of the pilot project for the construction of steel-structured prefabricated houses in Zhejiang Province. It was approved that Zhejiang Province should carry out pilot work to accelerate the construction of steel-structured prefabricated houses and promote the transformation and upgrading of the construction industry. On July 29, the reporter learned from the Construction Department of Zhejiang Province that the promotion of steel structure assembly houses will select Hangzhou, Ningbo and Shaoxing as pilot areas. It is planned to build a total of 800 steel-structured houses in the province by 2022. More than 10,000 square meters, including 500,000 square meters of rural steel structure assembly houses. The Construction Department of Zhejiang Province stated that the promotion of steel-structured prefabricated houses needs to be step by step. This time, Hangzhou, Ningbo and Shaoxing were selected as pilot areas, including Lin'an District of Hangzhou City and Keqiao District of Shaoxing City as pilot areas for rural steel structure assembly houses, and exploring the construction of 1-2 demonstration villages of light steel structure. According to the requirements, a certain proportion of the projects in the pilot areas of affordable housing, relocation and resettlement housing, commercial housing, rural housing construction, dilapidated housing renovation, and future community residential projects in Zhejiang Province will be constructed using steel structures.

As the level of technology continues to advance, the materials people use to build homes are changing at an extremely fast rate. From civil engineering to masonry to reinforced concrete, it is hoped that a way to improve construction efficiency and reduce construction costs will be found, and prefabricated buildings will emerge. And it is indeed a historic breakthrough for the development of industrialization of buildings, bringing more business opportunities to the construction industry. Subversion of traditional architecture Compared with traditional cast-in-place reinforced concrete and masonry buildings, the prefabricated building adopts the construction of building components including beams, slabs, columns and external walls. After maintenance and acceptance, it is transported to the site for installation and construction. Construction method. It broke the traditional construction method of “Qin Brick Hanwa” for thousands of years, completely subverting traditional architecture with “standardization” of building components and “industrialization” of construction methods. The assembled form of the prefabricated building has made many improvements on the basis of traditional architecture, avoiding many shortcomings of traditional architecture, such as long construction period, high labor cost, large amount of dust, noise, sewage, etc. during the construction process. At the same time, the construction speed of the prefabricated building is also relatively fast, which greatly reduces the labor intensity and time of the workers, and facilitates the orderly operation of the crossover work; each process in the building assembly can be inspected with the accuracy of the equipment to ensure the quality of the building construction; The noise is reduced during construction and the material stacking site is reduced, which is conducive to environmental protection. Due to factory production and standard assembly on site, the cost of building construction is reduced, and it is easy to meet the requirements for installation and decoration of indoor equipment. Therefore, it can be said that many advantages of prefabricated buildings are unmatched by traditional buildings.

With the successful implementation of the “cranked five-section continuous curve” steel box girder jacking construction process of Hangzhou Jiangdong Bridge (Qiantang Jiangjiu Bridge), it marks a new domestic blank – the multi-section curve pushing process of large steel structure is filled. This construction process is still used for the first time in China. Located at the northeast corner of Hangzhou City, the Jiangdong Bridge has a total length of 4,332 meters and a total investment of 1.89 billion yuan. It is currently the largest bridge project under construction on the Qiantang River. The second contract section is 1,905 meters long and the bridge section is 1802.7 meters long. The bridge has a unique structure, a multi-bridge, complicated process and high technical difficulty. At the same time, a large number of new processes are applied. The main navigation hole bridge has a unique shape and is a three-span space cable self-anchored suspension bridge, which means “Qianjiang Fanying”. The suspension bridge has a main span of 260 meters. It adopts a single-column bridge tower, a separate steel box stiffening beam, a space cable, and no slings for the side span. This type of suspension bridge has no precedent in China. The construction feature of the self-anchored suspension bridge is the first beam rear cable, and the steel box beam is generally installed by the jacking method. The most unique feature of the push-pull construction of the Jiangdong Bridge steel box girder is that the steel box girder adopts the “five-segment continuous curve” structure during the installation and erection phase, which makes the jacking process very complicated. This type of jacking construction and system conversion technology for the upper space cable of the suspension bridge is the first in China, and it has been successfully implemented only in the French Miyue Bridge and the Hangzhou Jiangdong Bridge in China.

Light steel structure is a young and vital steel structure system, which has been widely used in general industrial and agricultural, commercial and service buildings, such as office buildings, villas, warehouses, stadiums, entertainment, tourist buildings and low and multi-layer In the fields of residential buildings, etc., it can also be used in areas such as old buildings, renovation, reinforcement and lack of building materials, inconvenient transportation areas, tight construction schedules, and movable demolition buildings. It is favored by the owners and has the following characteristics: 1. Shock resistance: Most of the low-rise villas are sloping roofs. Therefore, the roof structure basically adopts a triangular roof truss system made of cold-formed steel members. The light steel members form a very strong after sealing the structural plates and gypsum boards." The ribbed structural system, which has a stronger ability to withstand earthquakes and resist horizontal loads, and is suitable for areas with a seismic intensity of 8 degrees or more. 2. Wind resistance The steel structure has light weight, high strength, good overall rigidity and strong deformation ability. The building's own weight is only one-fifth of the brick-concrete structure, which can withstand hurricanes of 70 meters per second, so that life and property can be effectively protected. 3. Durability The light steel structure residential structure is composed of cold-formed thin-walled steel component system. The steel bone is made of super anti-corrosion high-strength cold-rolled galvanized sheet, which effectively avoids the influence of corrosion of the steel plate during construction and use, and increases the service life of the light steel component. The structural life can reach 100 years. 4. Thermal insulation The thermal insulation material used is mainly made of glass wool, which has good thermal insulation effect. The insulation board of the outer wall effectively avoids the "cold bridge" phenomenon of the wall and achieves better insulation effect. The thermal resistance of R15 insulation cotton with a thickness of about 100mm can be equivalent to a brick wall of 1m thick. 5. Sound insulation The sound insulation effect is an important indicator for evaluating the house. The windows installed in the light steel system are all insulated glass, with good sound insulation and sound insulation of more than 40 decibels. The wall made up of light steel keel and thermal insulation gypsum board can have high sound insulation effect. 60 decibels. 6. Comfort The light steel wall adopts an energy-efficient system, has a breathing function, and can adjust the indoor air dry humidity; the roof has a ventilation function, which can form a flowing air between the interior of the house to ensure the ventilation and heat dissipation requirements inside the roof. 7. Fast All dry work is carried out and is not affected by the environmental season. A building of about 300 square meters, only 5 workers and 30 working days can complete the whole process from foundation to decoration. 8. Environmental protection The material can be 100% recycled, truly green and non-polluting. 9. Energy saving All adopt high-efficiency energy-saving walls, which have good insulation, heat insulation and sound insulation effects, and can reach 50% energy-saving standards.

The steel structure itself is light in weight, high in strength, high in pressure resistance, and has the magical characteristics of short construction period. The perfect artistic structure after joining aesthetics is an important reason for its rapid emergence as a hot spot. At present, there are many large, diverse and complex projects and civil buildings in various places in China. The Bird's Nest Gymnasium at the 2008 Beijing Olympic Games has attracted the attention of hundreds of millions of people around the world. But what you may not know is that the bird's nest is the form of steel structure. What are the advantages and advantages of building a steel structure factory? The steel structure workshop is a kind of building structure with high self-weight, light weight and high strength. The main components are: steel pillar, steel beam, steel structure foundation, steel structure roof truss, steel roof, steel wall with attention to steel structure. Maintained with brick walls. In terms of appearance, the steel structure has simple and smooth lines, which is quite modern and artistic. For color, the color wall panels are available in a variety of colors, and the walls can be made from other materials for greater flexibility. Wide range of uses: suitable for factories, warehouses, office buildings, stadiums, hangars, etc. Suitable for single-story, large-span buildings as well as multi-storey or high-rise buildings.   The building is simple and the construction period is short: all the components are prefabricated in the factory, and the site is simply assembled, which greatly shortens the construction period. A 6,000 square meter building can be basically installed in 40 days.   Durable and easy to repair: The versatile computer-designed steel structure resists harsh weather and requires minimal maintenance. Beautiful and practical: the steel structure building lines are simple and smooth, with a modern sense. The color wall panels are available in a variety of colors, and the walls are available in other materials for greater flexibility.   Reasonable cost: the steel structure has light weight, reduces the basic cost, and has a fast construction speed. It can be completed and put into operation as soon as possible, and the comprehensive economic benefits are much better than the concrete structure.

1. Brief introduction of application of glass curtain wall shading technology The shading technology of glass curtain wall is mainly used in the project to achieve the shading effect by the effective combination of glass and metal materials; the metal material mainly has two kinds of perforated aluminum plate and aluminum grille, and the architect uses the function, position and height according to the building. And the local sun's time angle, illumination angle, elevation angle, declination angle, azimuth and other factors. Ten different product types and horizontal sunshade product combinations were designed vertically in different locations and on different floors of the building. The entire building uses shading technology to truly improve the indoor lighting conditions, while effectively controlling the indoor temperature and improving people's comfort. The application of glass curtain wall shading technology has a lot of good effects on building energy saving. The future energy-saving building (the term "energy-saving building" is provided by the industry encyclopedia) construction glass curtain wall construction technology is indeed worthy of better promotion and application.   2. Glass curtain wall shading technology for solar radiation application In general, the shading coefficient is controlled by the nature of the material itself and the environment. In this project, the shading coefficient is the vertical direction by using different shade forms, sizes and widths of the shade products (250~1600mm) in different positions, and changing the number, angle and height of the shade products horizontally to minimize the penetration. The ratio of the solar radiation heat of the enclosure with shading and the enclosure without shading. The smaller the shading coefficient, the smaller the solar radiation heat through the outer protective structure, and the better the heat protection effect. The effect of the sunshade on blocking the radiant heat of the sun is obvious.   3. Application of Glass Curtain Wall Shading Technology to Energy-saving Building Lighting From the point of view of natural lighting, the shading measures will block direct sunlight, prevent glare, and make the indoor illumination distribution more uniform, which will help the visual work. This project mainly uses different layouts of shading products to adjust the perforation rate of the perforated plate and The density and angle of the aluminum grille to achieve visual normal work. For the surrounding environment, the sunshade can disperse the reflected light of the glass of the glass curtain wall (especially the coated glass), avoiding the light pollution caused by the large glass reflective. However, in the design of the shading system, there must be sufficient consideration to meet the requirements of indoor natural lighting. In the process of designing the project, the situation of the side light is better paid attention to, the design of the sunshade is used to avoid the side light, and the sunshade product and the glass curtain wall are effectively utilized to make the environment more comfortable.   4. Application of glass curtain wall shading technology to adjust room temperature to reduce indoor air conditioning system consumption A large number of glass curtain wall shading products have been applied in this project, effectively preventing the indoor temperature from rising rapidly. Especially in the summer, this kind of glass curtain wall shading technology can slow down the indoor temperature rise; use the shading technology to effectively reduce the cooling energy consumption of the air conditioning system and realize the building energy saving; for different regions, different glass materials and shading products should be reasonably selected, and the sunshade should be used. Only by effectively using the glass curtain wall shading technology to achieve natural room temperature adjustment; the combination and application of different forms of shading products in this project has truly realized the static movement of the architectural art, making its artistic beauty in front of everyone, making the building The appearance has been landscaping, but unfortunately, I have not been able to leave a photo of the project. The glass curtain wall shading technology does need to be more applied and popularized in building energy conservation, giving full play to the role that shading technology should have in the glass curtain wall and achieving the goal of building energy conservation.

1. Before the construction, the metal surface should be degreased, derusted and treated to improve the adhesion of the paint film. The surface moisture of the metal should be 3 °C above the dew point during construction. 2. Stir the paint evenly before use, and use conventional methods such as brushing and spraying. 3. When spraying, it is necessary to use high-temperature special thinner, the dilution amount is 5-15% (based on the weight of the paint), the nozzle diameter is 1.5-2.0mm, and the air pressure is 0.3-0.4MPa. 4. It is recommended to brush or spray 1-2 steps.   Summary: Through the introduction of the performance characteristics of high temperature paint and high temperature paint construction process, it can be seen that high temperature paint has excellent high temperature resistance, resistance to cold and heat, chemical gas corrosion, weathering resistance, water resistance and electrical insulation.

At present, the most common anti-rust paints are epoxy and alkyd, and the service life is 1-2 years. If the adhesion of alkyd on the galvanized sheet and aluminum sheet is poor, it is generally required. The materials are steel and concrete, and the adhesion ability of these coated substrates epoxy antirust paint is better, and this super strong adhesion is innate. This article mainly popularizes the coating knowledge in this aspect.   The widely used anticorrosive and anticorrosive primer on steel equipment is an epoxy zinc-rich primer. The specific thickness of the coating is determined by the period of use of the anticorrosive coating, the surface treatment of the substrate, and corrosive factors. When directly coating the blasted steel structure and steel components, it is required to increase the roughness of the surface of the substrate by grinding, and the roughness conforms to the standard of 50 μm. When used as an anti-corrosive primer, the recommended dry film thickness of the manufacturer is 60μm. It is better to spray it once without air spray, while the brush is only used for small-area spraying. When air-spraying, it needs to be painted twice; When used as a shop primer, it generally provides 3-6 months of anti-rust function, and is usually used for temporary anti-corrosion coating of workpieces, but this does not affect the welding performance. For welding requirements, the dry film thickness is generally required to be 25μm. . According to actual engineering experience, long-term outdoor steel structure anti-corrosion and decoration engineering needs to increase the dry film thickness to 70-80μm.   Zinc-rich primer is a porous coating. When used in combination with intermediate paint, the coating interval is generally 16-24 hours. The coating process is: when applying the first pass, it needs to add about 50% thinner, fog. Spray it once and then spray it normally. It can effectively avoid the problems of various zinc-rich primer coating manufacturers such as foaming.

From June 26 to 27, the 2019 Second Steel Industry Intelligent Manufacturing Development Forum co-sponsored by China Iron and Steel Industry Association, China Steel Research and Technology Group Co., Ltd. and Hegang Group Co., Ltd. was held in Shijiazhuang City, Hebei Province. With the theme of "Internet, integration, and change", the forum aims to implement the major strategic deployments of the Party Central Committee, the State Council to build a network powerhouse, and digital China, promote the application of the industrial Internet in the steel industry, and enhance the intelligence and digitization of the steel industry. Green level. Yin Ruizhen, academician of the Chinese Academy of Engineering and deputy director of the former Ministry of Metallurgical Industry, and Sun Yu, academician of the Chinese Academy of Engineering, attended the opening ceremony of the forum and gave speeches entitled "The constitutive characteristics of the process-oriented manufacturing process" and "The development trend of the Internet of Things industry in China". The guests attending the opening ceremony were Lu Guixin, Inspector of the Raw Materials Department of the Ministry of Industry and Information Technology, Chi Jingdong, Vice President of the China Iron and Steel Industry Association, Gong Xiaofeng, Director of the Hebei Provincial Bureau of Industry and Information Technology, Peng Zhaofeng, General Manager of Hegang Group Co., Ltd., Wang Xindong, Deputy General Manager, and China Steel Research Institute. Zhang Jianwu, member of the Standing Committee of the Science and Technology Group Co., Ltd., and more than 300 people from the relevant leaders of information technology in various steel enterprises, related experts in upstream and downstream service enterprises in the industrial chain, cutting-edge technology companies and media representatives. The guests focused on the theme of the forum, "Internet, integration, and change", and jointly explored the focus and ways of the "smart +" of the steel industry under the new situation, and promoted the application of technologies such as Internet of Things, big data, 5G, and artificial intelligence in the steel industry. To promote the digital transformation of the steel industry. After the opening ceremony, experts from various ministries, research institutes, steel companies, IT companies, etc., focused on the application and practice of the industrial Internet in the steel industry, and the application and practice of emerging technologies in steel production scenarios. The special report of the field was highly praised by the participants.

On June 18, 2019, the symposium on the implementation of policies such as tax reduction and fee reduction in the steel industry was held in Beijing. Vice President Qu Xiuli chaired the meeting, and 15 key steel producers such as Taigang, Baowu and Angang participated in the discussion. The meeting exchanged the implementation of policies on reducing the value-added tax, reducing the fees charged by enterprises, easing the financing difficulties of enterprises, and clearing the amount of government defaults. The analysis of the difficulties and problems encountered in the implementation of the policy and the further implementation of the study. Opinions and suggestions on tax reduction and fee reduction.