Construction technology of post-pouring belt in building engineering?

In the process of urban development and construction, in a sense, it is inseparable from the construction and development of architectural engineering. Especially in some developed cities, the importance of architectural engineering is self-evident, which is of great significance to economic construction and political civilization development. But at the same time, with the continuous acceleration of urbanization, more and more problems are exposed. Due to the influence of various factors, engineering quality problems appear frequently. This requires the construction units and operators to pay enough attention to improve the quality management in the actual construction process, improve the quality of construction work by establishing a sound supervision and management mechanism, and adopt effective construction technical measures to improve the quality of construction work and reduce the cost of construction work. As an important part of building construction, the construction of post-pouring belt is extremely important to ensure the structural quality and construction progress of building engineering.

1 summary of construction technology of post-cast strip

1. 1 construction technology of post-cast strip. The construction technology of post-pouring belt mainly refers to the construction of post-pouring belt in order to effectively avoid various quality problems in reinforced concrete pouring at present. It is carried out due to the specific needs of construction work, mainly referring to the construction of floor, beam and wall. In a sense, in the process of building construction, quality problems such as deformation of concrete steel structure are easily caused by various external factors, such as temperature and weather changes. The occurrence of this phenomenon not only affects the service life of construction projects to a certain extent, but also threatens the safety of people's lives and property. Therefore, it is extremely important to adopt the construction technology of post-pouring belt in the construction process. 1.2 technical and functional characteristics of post-pouring belt construction. With the continuous innovation and development of China's architectural engineering construction, more and more common quality problems will be exposed in its construction, such as possible deformation and cracks in the construction process. In view of this problem, as a manager, it is necessary to make clear the cause of the accident, and carry out different degrees of quality control by reasonably standardizing the construction technology of post-poured strip. At this time, the construction technology of post-pouring belt is particularly important. The following is a detailed introduction to the functional characteristics of post-pouring belt construction technology: First, solve the problem of poor settlement. In the construction of high-rise buildings, the building structure sometimes lacks practicability in the design stage, which leads to the difficulty in presenting the construction design in the actual construction process, and thus causes the settlement problem. At this time, the technical measures of post-pouring belt construction can effectively solve this problem, and even make up for the important problems between high and low floors through targeted watering. The second is to reduce the influence of temperature change and concrete shrinkage. In a sense, after concrete pouring, it will generally be placed for a period of time before it can be fully utilized. However, during this period, concrete is also most vulnerable to temperature changes, resulting in deformation and even shrinkage. Therefore, after the completion of concrete construction, it is necessary to remind the construction personnel to protect the concrete within the specified range. If the concrete is deformed due to temperature change, the construction technology of post-pouring belt should be reasonably selected according to the unused deformation degree, so as to ensure the quality and safety of construction work as a whole and reduce the construction cost to a certain extent.

2 construction technology analysis of post-pouring belt in building engineering

2. 1 Select materials and time. Materials and time are extremely important for the construction technology of post-pouring belt. Especially before the construction of post-cast strip, the construction site must be cleaned reasonably to ensure that the construction environment of post-cast strip is clean, tidy and dry, and at the same time ensure the smoothness of construction sites on both sides of post-cast strip for more than 24 hours. In addition, in the process of post-cast strip construction, better building materials should be selected to enter the site, and unqualified building materials are strictly prohibited to enter the site. In order to effectively ensure the quality requirements of post-pouring belt construction, we can try to add a certain amount of water reducer in concrete construction, which can ensure the rationality of concrete mixing and proportioning. From a certain point of view, the podium and the main building are constructed as the same main body at the same time, but there are some differences between them in the construction process. As a construction worker, we must pay enough attention to it and improve our understanding of it in order to better carry out the construction of post-pouring belt. 2.2 Set up post-cast strip. As the most basic construction in building engineering, how to effectively set up post-pouring belt in the process of construction operation is a key problem that constructors must pay attention to. Because the post-pouring belt construction between the main building and the podium is different. Therefore, as a construction technician, we should proceed from the actual construction environment and make a reasonable choice. According to different periods and different construction techniques, reasonable settings are made. 2.3 Post-cast strip construction. In a sense, it is necessary to clarify the construction location and operation process in the process of post-pouring belt construction, and improve the construction quality by optimizing the construction operation. In general, the construction of post-cast strip can improve the shrinkage and deformation of concrete caused by temperature change within the range of 100 meters, and the main mode of joint is determined by the construction environment. 2.4 concrete pouring. When pouring concrete, the pouring thickness should be determined according to the requirements of the construction plan and specifications, so as to avoid the increase of lateral pressure caused by the large pouring thickness and the dimensional error of the overall concrete structure. Vibrate in time when pouring. In addition, in order to avoid the loss of cement slurry when vibrating concrete, the distance between formwork and vibrator should be limited within a certain range to ensure the quality of concrete pouring. 2.5 means of quality control of post-cast strip construction. Ensure the quality of concrete materials. According to the actual situation of building engineering structure, choose concrete materials, add expansion agent or water reducer, ensure the concrete construction mixture ratio to meet the established standards, and appropriately extend the concrete mixing time. In the process of concrete pouring, it should be poured in combination with the design and construction scheme, and vibrated and compacted in combination with specifications and standards. Scientifically adjust the casting deviation of post-cast strip.

3 optimization measures of on-site construction technology of post-cast strip

3. 1 Disconnection optimization of reinforced concrete cover of bottom slab without considering the post-cast strip. In view of the gap between the floor construction operation and the reserved post-pouring belt position, as construction technicians, it is necessary to clearly understand the distance between the formwork and the protective layer, and disconnect it at a suitable concrete distance after measurement and calculation. Then fix the steel bars in a reasonable position on the concrete binding plate. The main purpose of this is to ensure the quality of steel structure, and at the same time, it can reduce unnecessary procedures of concrete construction, reduce costs and improve quality to a certain extent. 3.2 The setting of water-stop steel plate and the optimization of the disconnection of upper and lower concrete at the water-stop steel plate. After the installation of floor reinforcement is completed, the construction of water stop steel plate and other processes will be carried out. Precast a concrete bearing with a certain height (consistent with the structural concrete label), and embed short steel bars at the upper end of the lower concrete cushion block as welding spots for fixing the water-stop steel plate. After the binding of the bottom steel bar is completed, the concrete end supported by the water stop steel plate is bound and fixed on the bottom steel bar. The bearing spacing depends on the actual situation to ensure that the water stop steel plate can be fixed. After the support is fixed, the dense mesh steel mesh is bound on the support along the direction of the water-stop steel plate as the setting for concrete disconnection at the lower part of the water-stop steel plate, and then the water-stop steel plate is welded, and steel piles are welded at appropriate positions to bind the dense mesh steel mesh. Steel piles should be the same height as the upper reinforcement. Finally, tie the upper steel bar, and tie the wood square steel bar with the same height as the steel bar protective layer at the concrete fracture above the surface of the upper steel bar. 3.3 Construction technology of contact surface roughening treatment. In the construction work of building engineering, after the concrete construction work is completed, it can be cleaned by effective construction measures in the initial setting stage. At this time, the instructions can be treated with a steel brush, so that the specific instructions can be chiseled off, and then the pipe diameter can be scrubbed with clean water. The main purpose of this is to form a layer of chisel wool on the concrete instructions, so that the corresponding position can be clearly found when mixing concrete in the field construction work, and it is convenient for post-pouring treatment after settlement. A certain degree of protective film is formed on the protective layer. After pouring is completed, the position of post-pouring belt can be sealed with the help of wooden boards to prevent dust from entering and ultimately affect the quality. In traditional practice, chiseling is to remove all the old concrete surfaces. If the concrete is not loose or seriously polluted, it can meet the stress requirements only by chiseling, because the closure of post-cast strip is generally after the main structure is capped. At this time, although the concrete has been finally set, if there is no looseness or pollution, it will not affect the stress on the contact surface. In the optimization practice, not only the quality is effectively guaranteed, but also the construction of cleaning and chiseling in the later stage is omitted, which obviously saves the construction period and cost.

4 conclusion

To sum up, at this stage, due to the continuous innovation and development of the national economy, in the construction of construction projects. To a great extent, this is both an opportunity and a challenge for architectural engineering. If the construction project wants to occupy a place in the fierce market competition, it is necessary to strengthen the quality control of the construction project and solve the quality problems existing in the construction project through reasonable solutions. At the same time, it also requires construction technicians to constantly learn and innovate the advanced nature of construction technology and establish and improve the supervision and management mechanism. Ensure the quality of post-pouring belt construction technology in building construction. Really promote the construction and development of architectural engineering.

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