The first thing that steel members should pay attention to in the construction site is the wooden pillow bottom with sufficient supporting surface. The transportation of steel members also needs attention. Regarding the construction of steel structure, before the completion of component hoisting, it is necessary to ensure that the surface of the component is dry and clean, and the specific model and location are not wrong.

Innovative construction technology of civil engineering building

Construction technology of deep foundation pit support

The emergence of deep foundation pit support construction technology is mainly due to the emergence of various large and super high-rise buildings in the city, among which deep foundation pit construction is the key to ensure the construction quality of large and high-rise buildings. Deep foundation pit engineering mainly includes five aspects: geotechnical engineering investigation and engineering investigation, supporting structure design, foundation pit excavation and supporting construction, stratum displacement prediction and surrounding engineering protection, and construction pioneer measurement and monitoring. At present, according to different construction requirements, there are more and more support methods for deep foundation pit, including concrete cast-in-place pile, manual digging pile, prefabricated pile, deep mixing pile and steel sheet pile. Therefore, in concrete civil engineering, it is very important to design and predict the supporting structure of deep foundation pit scientifically and take safe and reasonable supporting technical measures to ensure the construction of deep foundation pit. The function of deep foundation pit supporting structure in civil engineering is to realize the function of retaining soil and water in the process of foundation pit excavation, so as to ensure the smooth progress of foundation pit excavation and foundation construction without affecting the surrounding buildings and roads. Some supporting structures can be reused, while others will be buried underground, so the supporting structures should not only ensure construction safety, but also be economical and reasonable. Several commonly used deep foundation pit support technologies: steel sheet pile support, deep mixing cement pile support, underground continuous wall, soil nailing wall, soil anchor support, anchor shotcrete net support, etc. In practical application, steel sheet pile is widely used because of its simple construction technology.

New prestress technology

Regarding the new prestress technology, external prestress should be described emphatically [3]. Compared with the internal prestressed structure, the external prestressed construction requirements are lower. Considering the particularity of external prestress, that is, the external material can not vibrate with the prestressed structure, and must maintain independent vibration. This is because when the external prestress vibrates, it is easy to cause bending fatigue of prestressed tendons. In the prestressed technology, the setting of prestressed structure is very important, and different construction techniques should be designed according to different engineering characteristics. In the design of concrete structure, we should fully understand the characteristics and load performance of civil engineering and formulate a reasonable prestress construction scheme.

Construction technology of bored pile foundation

The construction of cast-in-place pile is relatively simple, and it can be drilled mechanically or dug manually, without using large machinery, and it will not cause great noise, vibration and the harm caused by squeezing the surrounding soil, and its economic cost is lower than that of underground continuous wall. In general, when the depth of foundation pit reaches 8- 14m, row piles can be used. Column cast-in-place pile works reliably, but attention should be paid to the binding effect of cap beam veneer, especially at the corner of foundation pit, the cap beam should be high and continuous. When the cast-in-place pile is required to play the role of water resistance and seepage prevention, it should be ensured that there is a deep waterproof mixing pile or jet grouting pile between the pile and the pile back. If the environmental protection requirements around the construction are strict, in order to effectively reduce the deformation of row piles, cement mixing piles should be used to reinforce the bottom of the foundation pit along the periphery of cast-in-place piles or some areas in soft soil areas to effectively ensure the resistance of passive areas. With the wide application of bored piles in civil engineering, the mechanical equipment and construction materials used should be made more detailed and clear while strengthening the technology, so as to ensure that the construction technology of bored piles foundation is more perfect.

Future development of civil engineering construction technology

industrialization

Industrialization of civil engineering is one of the development trends of construction industry in the future [5]. The development mode of industrialization has greatly reduced the labor intensity and realized the assembly line function with higher quality. This industrialization mode needs the support of corresponding technology, which turns building construction into integrated operation and forms standardized construction technology to replace the original manual construction. With the help of industrialization and the adoption of more advanced construction equipment and technology, the risk index of manual construction can be reduced on the basis of improving the efficiency and quality of building construction, which is more conducive to scientific management.

Ecologicalization

With the penetration of low-carbon concept and low-carbon economy, there is a certain contradiction between civil engineering construction and environment. Solving this contradiction and realizing the harmonious development of civil engineering construction and environment has become one of the development directions of future building construction. From the perspective of environmental protection, we should minimize the damage and pollution to the environment. So we need to start from all aspects. First of all, from the building materials, increase research and development efforts, develop in the direction of conservation-oriented and environment-friendly building materials, and optimize construction machinery and equipment, improve construction efficiency and minimize energy consumption. At the same time, from the perspective of waste utilization, industrial waste should be produced as little as possible, and on this basis, the reuse of industrial waste should be strengthened to effectively save resources. At the same time, the construction technology will be innovated again and play a better role in concrete civil engineering construction.

In a word, the construction technology of civil engineering buildings has made great innovation in the original technology, because buildings are constantly changing and need new technologies to better support their construction. In order to make civil engineering better used by the society, it is necessary to continuously carry out research and development, apply theory to practical civil engineering construction technology, and ensure the construction quality of civil engineering.

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