Application of green construction technology in building engineering?

since the founding of new China, China's internal construction has advanced by leaps and bounds, the development of economic strength has continuously broken through new highs, people's material foundation has been greatly improved, and the construction of a well-off society in an all-round way has been basically realized. However, behind the prosperity of the country, there are hidden dangers brought about by construction and development. In the development of various industries, problems such as energy crisis caused by a large amount of energy consumption and global warming caused by high carbon emissions have become increasingly prominent, and frequent natural disasters have constantly sounded the alarm for people. On this basis, vigorously promoting low-carbon economy has become the main direction of China's development. Based on the above background, this paper analyzes the application of green construction technology in construction projects in order to realize the sustainable development of engineering.

The construction industry is the basic guarantee of social construction, and it is also one of the main causes of a lot of pollution. Therefore, in order to improve the engineering industry, green construction technology came into being to help the project improve efficiency and realize energy conservation and emission reduction. Green construction refers to the project construction, under the basic premise of ensuring quality and safety, through scientific management and technological progress, to minimize the impact of energy use and construction team environment, which is a modern technical means based on the concept of harmonious development between man and nature.

1 the significance of green construction

as an outstanding means of modern engineering industry, green construction technology is not only aimed at controlling the noise, smoke and other pollution generated in the construction process, but also at the combination of engineering field with ecological and environmental protection, resource and energy utilization, social and economic development and other fields, so as to realize the modernization and sustainable development of engineering industry. Due to the complexity and particularity of engineering construction, in operation, it is inevitable that a large amount of dust, noise and waste will accumulate due to the use of large-scale instruments and equipment and the collection of on-site building materials, which will directly affect the quality of large-scale environment around the project and threaten the health of on-site staff and residents. If green construction technology cannot be used for improvement, the project will be questioned by the public and hindered.

Modern construction projects often have the characteristics of large scale, high floors and complex structure, and the consumption ratio of materials increases correspondingly during construction. However, under the background of energy shortage in the world, if a large number of non-renewable resources are still over-utilized, it will lead to a crisis in nature. Therefore, green construction technology can effectively improve the utilization efficiency of energy during construction, reduce waste, and follow the continuous development of science and technology, and can also use cleaner new energy to work. At present, all walks of life are actively practicing the concept of low-carbon development. If the engineering industry cannot pay more attention to it as soon as possible and improve and innovate its own technology, it will lead to deviation from the market demand and be eliminated by the times. Therefore, in order to build a low-carbon society with all industries, adopting green construction technology can effectively reduce the consumption of high-carbon energy, thus creating a new chapter in the engineering industry and achieving a win-win economic development pattern of economic and social development and ecological environmental protection.

2 application of green construction technology in building engineering

green construction technology is not only an idea in building engineering, but also a core technology application that modern construction should have. In practical work, it should be planned in combination with engineering characteristics, and the optimal transformation of construction links should be realized through resource saving and technical improvement. 2.1 Resource conservation. The functions of modern architecture are constantly expanding. In addition to its basic shelter from wind and rain, it is necessary to provide people with more comfortable living space in order to meet the increasing market demand.

China has a vast territory, and different cities have different requirements for buildings due to geographical location and climate differences. However, no matter which city, thermal insulation performance should be fully considered in winter, so the walls and roofs should be insulated during construction, and the selection of materials can be optimized by improving the energy-saving awareness of designers and staff, and the performance and quality of materials should be comprehensively considered. Combined with the actual situation of the project area, for example, in the northern buildings, thickened materials should be used to ensure the indoor temperature in winter, while in the southern buildings, the change of outdoor humidity should be considered to keep the walls dry, thus reducing the indoor heat emission and energy consumption. In the construction process, construction workers should recycle construction waste and waste heat, promote the recycling of resources and reduce the consumption of the project, which can not only improve the efficiency of energy use, but also reduce the cost of the project.

2.2 green construction technology. 2.2.1 wall energy saving. As the main part of the building, the wall should be integrated with the external wall, load-bearing wall and other work links with the green concept during construction, so as to achieve the goal of energy saving for the whole building. In the wall construction, hollow bricks should be used to complete the construction, which can not only ensure the stability of the building, improve the durability and service life of the building, but also reduce the consumption of resources. The construction quality of hollow brick is determined by the bricklaying process and the direction of hollowing. During the construction, attention should be paid to the reasonable discharge of hollow brick, and the work should be carried out in strict accordance with the design drawings. When laying embedded parts and pipelines, it is not allowed to punch holes randomly or plug holes with cement before planning, thus improving the stability of energy-saving construction walls.

2.2.2 wall insulation and energy-saving construction. The thermal insulation performance of the wall determines the indoor temperature and the user's experience, and the construction work should be paid more attention. In the green energy-saving construction of the wall, it mainly includes spraying, plastering, sticking and dry hanging. From the installation of the insulation system, it can be divided into two areas: the outer side and the inner side. If the insulation arrangement is carried out on the outer side of the wall, although the indoor space utilization can be reduced and the room area can be widened, the interference and loss to the wall insulation system are obvious due to the great change of the external environment, and there is a certain one-sidedness. However, if the insulation system is arranged indoors, it will not be affected by the outside world.

2.2.3 water saving in construction. In the construction project, due to the need for dust suppression, greening and equipment cleaning on the site, and the huge consumption of water resources by some construction technologies, resulting in a certain amount of waste, rainwater and wastewater should be recycled when working with green construction technologies, so as to achieve energy-saving effects. In view of the waste water generated in site construction, it should be classified according to its source, treated with modern equipment, and then put into the construction link again. For example, the treated water can be used for structural maintenance water, foundation pit support water, soil nailing wall support water, soil nailing hole grouting water, etc., so as to improve the utilization rate of water resources. The water resources produced in nature, such as rainwater, should be treated by rainwater infiltration and accumulation, and stored in a centralized way for easy access at any time. In addition to the above methods, we can also protect water resources by treating and reusing residents' domestic water.

2.2.4 solid waste recycling. The consumption of solid materials, such as steel bars and concrete, is huge during construction. In practical work, surplus and waste will inevitably occur, so it needs to be properly kept and reused. At present, some construction units are considering their own convenience, and the arbitrary accumulation of solid waste directly affects the quality and aesthetics of the environment, so it is necessary to strictly control it. In the treatment of solid waste, recycling is the main thing. Once it involves discharge, it needs to be treated and placed in the designated place. The excavated soil in the construction should be piled up in a centralized way, and it should be retrieved and filled after the underground construction is completed to improve the utilization rate of soil; The garbage generated in buildings should be classified into two types: recyclable and non-recyclable, and reasonably planned and placed according to the characteristics of the waste itself. The recyclable garbage should be selected and treated to realize the reuse of the waste, while the non-recyclable garbage should be sent to the designated treatment unit, especially the toxic and harmful substances, which should be properly protected before being sent. As one of the main materials in buildings, concrete has a large amount of waste, so recycling technology should be applied to make concrete into aggregate according to the concrete mixture ratio through cleaning, crushing and grading, so as to realize reuse.

3 Conclusion

In construction engineering, green construction technology is not only the embodiment of the modernization and environmental protection consciousness of the engineering industry, but also can effectively alleviate the energy crisis, improve the energy utilization efficiency and indirectly improve the economic benefits of the construction unit by saving energy, which is an important means to realize the sustainable development of the construction industry.

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