As a basic project in building construction, the construction condition of foundation engineering has great influence on the whole project, which is directly related to the safety of the whole project. The following is the discussion paper on construction technology in housing construction project that I collected for you, for your reference, and I hope it will help you.
Abstract: In building construction, construction technology plays an extremely important role, which directly affects the quality of building construction. Therefore, this paper analyzes various construction technologies that need to be applied in current building construction, and probes into some common quality problems that should be paid attention to in its technical application, including foundation treatment, seepage prevention construction, honeycomb pits and so on.
Keywords: building construction; Construction technology; Attention problem
introduce
With the rapid development of the construction industry, the market competition in the construction field is becoming increasingly fierce. In this environment, in order to survive and develop, some construction enterprises regard the quality of housing construction as a strategic advantage to participate in market competition, emphasizing the quality and quantity of housing construction. Judging from the current situation of housing construction, the overall level of building quality is not high, and leakage occurs frequently. Therefore, construction enterprises must combine the problems existing in housing construction with the actual engineering situation and adopt scientific anti-leakage construction technology to effectively solve the problems, so as to better improve the quality of housing construction projects and establish a good corporate image. At the same time, in the process of building construction, construction enterprises need to pay attention to the management of building materials, construction technology and construction personnel, control the quality of building construction from the source, and then solve the problem of building leakage more effectively.
1 Discussion on construction technology of housing construction project
Technical application of 1. 1 in foundation construction
As a basic project in building construction, the construction condition of foundation engineering has great influence on the whole project, which is directly related to the safety of the whole project. Therefore, in building construction, we must ensure the high quality of foundation engineering construction. The construction technology of foundation engineering is mainly embodied in the following two aspects.
(1) Deep foundation pit supporting construction technology. Before supporting the deep foundation pit, the construction unit must conduct on-site inspection, grasp the actual situation of the construction site and the depth of the foundation pit, and ensure that its construction complies with relevant laws and regulations. In the process of construction, we should always pay attention to the water level in the construction site to ensure that the distance between the foundation pit bottom and the water level is above 1m, and continuous drainage measures can be taken when necessary. In the process of foundation pit excavation, the distance between excavators must be above 10m, and relevant warning signs and safety railings should be set around the construction to strengthen construction safety protection. When manual hoisting is needed, the hoisting tools should be checked in advance to ensure the safety and firmness of the tools and provide reliable guarantee for hoisting construction.
(2) Pile foundation construction technology. Concrete cast-in-place pile is the most commonly used pile foundation construction technology in building construction. During construction, it is necessary to ensure that the diameter and depth of the hole reach about 3m and 100m respectively. After the pile foundation grouting operation is completed, the construction unit needs to inject an appropriate amount of cement slurry into the bottom of the pile side according to the actual situation to ensure the stability of the cast-in-place pile.
1.2 application of reinforcement construction technology
Construction technology of beam-column joints. In the stirrup construction of beam-column joints, on-site welding construction technology can be used for construction activities. After the skeleton construction is basically completed, insert the prepared column longitudinal reinforcement that meets the standard into the skeleton and tie it firmly. It should be noted that the included angle between the longitudinal short steel bar and stirrup should be greater than 50mm to avoid collision between them, and the longitudinal short steel bar can be converted into fine steel bar during blanking.
Construction technology of longitudinal reinforcement of frame column. In the installation process of longitudinal reinforcement of frame column, according to the actual characteristics of installation construction, the construction technology of welding and mechanical connection can be adopted. For places where lap joint is needed, in order to avoid insufficient lap joint area, attention should be paid to the treatment of lap joint ends, and bending treatment measures should be taken to keep the central axis of the bent steel bar consistent with the lower longitudinal steel bar to ensure the high quality of lap joint.
Construction technology of protective layer. When blanking the protective layer, the relevant construction personnel can reasonably reduce the stirrup height of the beam by about 20mm according to the situation to ensure the uniform stress of the beam skeleton. When the protective layer thickness of column longitudinal reinforcement and beam longitudinal reinforcement reaches more than 40mm, it is necessary to place steel wire mesh at the beam end.
1.3 application of formwork construction technology
Construction technology of beam formwork. Before the construction of beam formwork, play the axis and column edge first, and fix the pedal on the basis of playing the line. Secondly, the column formwork is erected to complete the cable-stayed jack-up to ensure that the verticality and diagonal position of the formwork are not offset. In this process, it is necessary to reserve a gap at the elevation position of the beam bottom and set up wood blocks to keep the distance between the wood blocks and the gap above 20m. When installing the column hoop, make sure that the distance between the column hoop is 50 cm. For a large-area column section, it is necessary to fix the formwork, and the fixing material can be the opposite pulling screw with the diameter of10 mm.
Construction technology of column formwork. In order to ensure the high quality of column formwork installation, the horizontal line between the axis and the beam must be strictly defined, and the column elevation should be appropriately adjusted according to relevant standards, and the formwork should be leveled by stay wires. When the beam formwork span is more than 4m, the beam bottom construction shall meet the requirements of arching. In the process of column formwork construction, steel pipe with diameter greater than 30mm can be used to build beam formwork support system.
1.4 application of concrete construction technology
(1) concrete preparation construction technology. In concrete construction, construction workers need to use geothermal cement to carry out construction work according to relevant construction technical standards, so as to ensure the stability and setting time of concrete construction to achieve the expected goal. At the same time, the coarse aggregate and fine aggregate used in concrete construction should be continuously graded sand and medium coarse aggregate respectively, and wood calcium water reducer or fly ash should be used as additives in its construction.
(2) Concrete pouring construction technology. When pouring construction, we should follow the relevant pouring construction principles, standardize the construction operation procedures, and ensure that concrete pouring reaches the top at one time. Before pouring, the construction personnel should test the quality of concrete to ensure the high quality of pouring construction. The unqualified concrete detected shall be re-mixed to prevent water injection of construction materials. In addition, the thickness of layered concrete pouring should be kept at 300mm, and the difference should not be too big. When pouring is suspended for a long time, corresponding construction joints should be set according to the construction situation.
(3) Concrete vibrating construction technology. In the vibrating construction, combined with the actual construction situation, the construction technology such as slope angle, slope middle and slope top can be used for concrete vibrating operation. Among them, the vibration point spacing should be kept at 400mm as far as possible. After the completion of the vibrating operation, the concrete surface shall be leveled with a scraper, and gravel with a diameter of 10 ~ 20 mm shall be laid on the concrete surface, and then the surface shall be leveled with a wooden trowel to improve the vibrating construction quality. After the completion of concrete vibrating construction, attention should be paid to timely maintenance and effective measures should be taken to maintain the best effect of concrete construction.
2. Problems that should be paid attention to in the application of construction technology
2. 1 Foundation Treatment of Building Engineering
In building construction, foundation is the most basic part, which directly affects the overall quality of building construction. Therefore, in order to ensure the safety of building construction, we should pay attention to the construction treatment of foundation, adopt high-quality building materials and carry out construction work in strict accordance with construction standards to ensure the high quality and high efficiency of foundation construction.
Before building construction, it is necessary to investigate the address of the construction site, but some construction units usually carry out construction according to subjective opinions and design experience, without making a detailed investigation of the site, which leads to many safety risks in building construction projects. Therefore, in order to reduce the potential safety hazards of housing construction, the construction unit needs to conduct on-site investigation seriously, design scientific and reasonable construction sketches in combination with the geological conditions and related characteristics of the construction site, and take targeted construction measures to ensure the safety and efficiency of foundation construction.
2.2 Problems existing in seepage control construction
In building construction, water seepage is an important problem to be considered, which is mainly caused by cracks around frame beams, columns and masonry. The leakage phenomenon of buildings will affect their appearance, service life, function and maintenance effect, so we must pay attention to the application of seepage control construction technology. During construction, bricks and other building materials should be inspected in advance to ensure that they meet the use standards. At the same time, bricks with inconsistent density or strength should be avoided in the masonry process. During the construction of frame structure, the daily masonry height should be controlled within1.5m. When the height reaches 200m, the construction should be stopped in time, and the construction will continue after 7 days. During the construction of insulation board, different construction techniques should be adopted according to the building height. When the height exceeds 20m, the insulation board can be fixed by pasting technology, and when the height is within the range of 20m ~ 100 m, the construction technology of pasting and pasting should be adopted.
2.3 Anti-crack construction problems
In building construction, attention should also be paid to the application of crack prevention technology for concrete structures. First of all, we should improve the construction efficiency of each working procedure, such as mixture ratio and vibration intensity, pay attention to water injection during concrete mixing and reduce the pouring temperature. In order to prevent the pouring height difference from being too large, block flat-fell seam technology can be adopted. Secondly, the construction personnel need to strengthen the maintenance work, and keep the water content of the newly poured concrete structure sufficient by sprinkling water in time to avoid cracks on the surface of the structure due to too long time.
2.4 Honeycomb pits problem
Honeycomb pits often appear in building construction. In the process of concrete structure construction, construction workers need to carry out construction work in accordance with the regulations, master the proportion of various components in concrete such as sand and water, and prevent bleeding after pouring. When installing formwork, flat-fell seam must be sealed tightly to prevent slurry leakage. After the pouring construction is completed, in order to prevent the coarse aggregate in concrete from sinking, it is necessary to vibrate the concrete properly to make it shape, so as to prevent the quality problems of honeycomb pits.
3 effective strategies to improve the construction quality of housing construction projects
3. 1 Strengthen the construction of the construction team
With the continuous progress of construction technology, owners have higher and higher requirements for the construction quality of housing construction projects. In this case, the construction unit must strengthen the construction of the construction team, take effective measures to improve the overall skill level of the construction team, strengthen the training activities of construction personnel, and ensure that personnel can master new technologies, new equipment and new processes in time. Only by improving the professional skill level of construction personnel can the new technology be better applied to the actual construction, thus improving the construction quality.
3.2 Innovative construction management methods
In building construction, in order to better meet the needs of the development of construction technology, we should innovate construction management methods, take technical guidance as the basis of construction management, and improve the technical application ability of construction personnel through the guidance and supervision of construction site. For example, when the concrete strength control standard is adjusted, we should know its details in time, innovate management methods and construction quality control means, correctly treat the influencing factors that cause quality problems in housing construction, strictly implement various management systems, standardize construction behavior, and realize the quality control of construction technology.
3.3 Establish and improve the construction technology control management system.
Relevant management departments should combine the details of building construction, build a perfect construction technology control management system, and incorporate the construction scheme and plan, construction technology management points and technical data control into the construction management system to ensure that the construction technology management has rules to follow, so as to implement the control of construction technology points more effectively and improve the quality of building construction.
refer to
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2. Zhou Yongtao. Exploration of foundation treatment construction technology in building construction [J]. Urban architecture, 20 14( 1)
3 Zhao Yuhong. Study on anti-leakage construction technology in building engineering construction [J]. Science and Technology and Enterprise, 20 14(4)
4 Sun Jinlong and Zhu Shibin. Discussion on quality control of water conservancy and hydropower engineering construction [J]. Sichuan Hydropower, 2005(6)
5 Mao Heqin. Civil engineering construction (3rd edition) [M]. Wuhan: Wuhan University of Technology Press, 2007.
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