Research on construction technology of high formwork in civil engineering?

High formwork construction technology is a typical formwork construction technology in civil engineering construction, which not only has strong bearing capacity and adaptability, but also can improve some inherent construction problems in civil engineering construction, so it has been widely used in civil engineering construction in recent years. However, due to the difficulty of this construction technology itself, only by doing a good job in safety control and construction quality management of high formwork construction can the application value of high formwork construction technology be essentially improved.

Summary of 1 high formwork construction technology

High formwork construction technology is mainly used in high-rise civil engineering construction, which plays a certain role in the construction and support of building formwork. Usually, a vertical or vertical bracing will be set next to the high formwork, and a horizontal support will be set at intervals. The conventional process is to measure the setting-out first, determine the civil axis, then carry out elevation operation, install keel and surface formwork in this process, and finally tie and fix it with steel bars, so that concrete can be poured and removed after the concrete is air-dried. For aerial work, the formwork support height should be at least 8m, and the whole construction span should be about18m. In the process of civil construction, the independent supporting formwork of some vertical components such as column wall should also reach about 6 meters. In addition, as an auxiliary construction technology in civil engineering, high formwork construction technology can play a certain aesthetic role for civil engineering, although it is not directly reflected in engineering. Due to the high technology of formwork construction, each formwork is built independently of each other, and the height is relatively large, so there are certain risks in the construction process.

2. Key points of high formwork construction technology

2. 1 high formwork installation. When installing high formwork, the first thing to consider is the material of splicing and installing formwork, and whether the material properties can be aligned with all formwork after splicing. Therefore, pine materials will be used for construction when installing high formwork. Secondly, when installing the template, you should leave appropriate gaps, but it is worth noting that the gap spacing should not be too large. Finally, after the installation is completed, attention should be paid to the dryness and humidity of the formwork as a whole to prevent the formwork from being spliced and deformed, which will affect the subsequent construction. 2.2 Floor installation. Before the floor support is installed, it is necessary to measure the setting out, then mark the axis of the beam, and then determine the horizontal height of the beam. Then, tie the scaffold along the beam and lock both sides of the scaffold. The upper scaffold and the lower scaffold must be in the same straight line. In this process, we must ensure the stability of scaffolding, otherwise it will easily cause construction danger.

2.3 Column beam setting of the outer frame. When setting the column beam of the outer frame, it can be expanded in several levels. Usually it is poured from column to beam slab in turn. However, it is worth noting that during the tile cover construction of the cross beam, the bent frame and the beam column should form horizontal support force, and at the same time, the whole beam column of the bent frame should be guaranteed to have strong stability, and the vertical horizontal bar of the main column beam bearing the main force must form column effect at both ends. Form a lateral force, and finally, the cable-stayed supporting steel pipe protruding from the middle of each column beam in civil engineering should be connected with the scaffolding on each floor to ensure its sufficient stability.

2.4 concrete pouring. Concrete pouring refers to concrete pouring or construction. The concrete operation process is to transport the concrete to the construction site by tanker and then to the high-rise building by pump. First, concrete is poured from the middle of the beam, and then poured to both sides. In this process, the uniformity of concrete stacking must be ensured, and the pouring height must be controlled within 145mm, which cannot exceed this range. When the concrete has been poured to the upper layer, it should be driven and spread evenly. At the same time, in the process of pouring construction, vibrating work is also an important content, so it must be carried out in accordance with the national construction norms and standards, strictly abide by the provisions, in order to ensure the vibrating quality of concrete, prevent excessive vibration or vibration leakage, and affect the stability of construction. 2.5 high formwork removal. The removal of high formwork is an important content in civil construction and must be carried out in accordance with relevant construction specifications. Therefore, the author thinks that the following points must be paid attention to: a. After 8 days of concrete vibrating pouring, construction technicians can test the strength of concrete. After the concrete strength reaches the construction standard, the high formwork can be removed. However, if the concrete strength does not meet the requirements of construction standards, it is necessary to wait for a period of time before carrying out a new concrete strength test. B. When the high formwork is dismantled, it must be poured first and then dismantled, and the construction shall be carried out in the order of segmentation, classification and division. In the process of demolition, first dismantle the side beam template, and then dismantle the column beam template. C. During the demolition operation, the platform shall be erected first, and then the wooden fang and formwork shall be dismantled. At the same time, in the process of formwork removal, the construction operation can be carried out in the order of loose square, loose board, formwork and support, and remember that the removed formwork is neatly stacked aside. In addition, we should strictly control the intensity of formwork removal to prevent load impact on floor buildings due to excessive force. After the formwork is dismantled, the dismantled formwork and sporadic supports shall be shipped out of the construction site in time. If it is not transported out of the site, it should also be piled up at a place 10 meters away from the floor edge, and it should be remembered that the stacking height should not exceed 1m, and any kind of demolition materials should not be piled up at the exit and access of the construction site. D. Finally, after all demolition tasks are completed, the removed templates should be inspected, and if there is leakage or damage, they should be repaired in time. After the surface of the formwork is cleaned, it should be classified and stored, which can be classified according to its varieties and specifications, and then properly kept for other projects.

3. Safety construction and quality management measures of high formwork in civil engineering construction

3. 1 Measures to improve the safety of high formwork construction. No matter in the application of any construction technology, its safety is always the first consideration, so the first consideration of high formwork construction must also be safety. From the author's work experience, there are five aspects that must be done. (1) When erecting the top formwork, it is necessary to set up fences at the construction site, and at the same time, some warning signs can be posted. Non-operating personnel are strictly prohibited from entering the construction site. (2) In the process of installation and removal of high formwork, brute force removal must be prohibited. Only by reducing the collision with the building wall in a scientific way can the construction safety be guaranteed, and the demolished parts should be piled up in a unified way to prevent the impact on other constructions. (3) When the high formwork construction reaches the highest point, a horizontal bar can be set every 2.2 meters, or the position of the horizontal bar can be set at the bottom of the threshold to improve the overall stability of the scaffold. (4) In the process of high formwork construction, if the scaffold is improperly set in the early stage, which will have a certain impact on the current construction, the construction personnel shall promptly notify the project management personnel and supervision personnel to stop the construction and dismantle the scaffold in time. However, it is worth noting that when the scaffold is dismantled, it should be dismantled from the inside of the scaffold with a cross lever, and at the same time, the installation of the scaffold can be redesigned when this work is completed.

3.2 Measures to improve the construction quality of high formwork. Construction quality management is the focus of civil engineering, so we should also pay attention to its construction quality when carrying out high formwork construction. Therefore, the author believes that the following points must be achieved in the construction of high formwork. First, in the process of construction organization design and planning, relevant schemes are formed for the specific details of high formwork construction, and special teams are organized to observe and measure the actual construction site, and the construction organization scheme is arranged according to the measured results. Second, strictly control the material quality of high formwork construction, which is the key factor to determine the construction quality. Therefore, the materials must be strictly controlled when entering the site, and they can only enter the site after passing the inspection. Third, after the high formwork construction is completed, check every construction link according to the construction specifications. At the same time, after the erection of scaffolding formwork, the relevant supervisor must be invited for acceptance, and the next link of construction can be carried out only after being signed by the technical director.

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