Study on prevention strategy of building structure construction?
Building structure construction mainly includes two parts: the main building structure construction and the auxiliary building structure construction. As one of the most important links in the whole construction process, its quality assurance is the basis of the quality and safety of the whole house.
1.65438+ First, ensure the size of steel bars, and secondly, pay attention to the uniform and symmetrical spacing of main bars in construction, so as to ensure the uniform stress, which is also the basis for ensuring the conduction of the supporting surface of the whole building structure. Stirrup mainly plays the role of restraining concrete and bearing, and is a strong support for main reinforcement. Pay attention to the uniform spacing with the main reinforcement in the building, otherwise it is not conducive to the constraint of concrete.
1.2 the influence of building structure material quality on building safety. The quality of building materials mainly includes the integrity of materials, the size of materials, the degree of compression and other indicators. It is the basis of whether the construction of building structure can meet the building quality and safety standards.
1.3 The external environment and internal quality also have great influence on the safety and durability of building structures. Environment and internal quality have different effects on building materials, thus affecting building structure and engineering quality. Therefore, it is necessary to analyze the environment, building materials and structure. For example, steel bars exposed to air in humid environment will be corroded. Internal non-compaction will directly affect the strength of concrete and the bonding and holding power of concrete to steel bars.
1.4 Influence of axis deviation of building components on structural safety performance. In the process of construction, human error leads to inaccurate setting-out, which in turn causes axis deviation of building components and affects the stress of structural components. Therefore, the construction unit must strictly control the building quality standards, find problems in time and deal with them.
2 common problems in brick-concrete structure
The early urban houses and rural buildings in China are mainly multi-storey brick-concrete structures, which are characterized by simple requirements for materials and simple construction technology. There are two common problems, one is the shear failure of mud bricks, and the horizontal earthquake force will lead to inclined cracks in the wall. For this problem, the following measures are usually taken to avoid it. 1. According to the material standard of masonry mortar in Code for Construction and Acceptance of Brick Masonry Engineering, the mortar label shall be calculated and determined, and the mortar label shall be increased by 15% according to the design requirements for trial matching. Second, reinforced concrete ring beams and structural columns are built in strict accordance with relevant standards.
Thirdly, the experimental study shows that clay brick masonry with high water content has high shear strength, so it is not suitable to use dry brick. Another problem is the poor connection between walls, which is usually caused by vertical seismic force, which leads to the separation and collapse of walls. The main prevention methods are: setting Rachel bars at the junction of vertical and horizontal walls, ensuring the section size and concrete strength index required by the design when girding, setting inner ring and outer ring when girding, adding splayed bars on the inner ring in strict accordance with the specifications, and paying special attention to the connection and structure of steel bars at nodes. In some constructions, there are some phenomena, such as mismatch of oblique rubbing, poor quality of receiving rubbing and nonstandard treatment of oblique rubbing. Relevant departments have issued relevant regulations, requiring that attention should be paid to biting masonry or leaving oblique rubs during construction. Temporary breaks that cannot be laid at the same time and must be kept shall be made into oblique rubs. If it is really difficult to leave oblique rubs at temporary breaks, you can leave straight rubs except at corners, but you must make them straight rubs and set Rachel bars.
3 common problems of cast-in-place steel structure
Cast-in-place steel bar structure began in the late 1950s, which is a late building structure. Because of its many advantages and short construction period, it is favored by more and more builders. However, many complicated problems have been encountered in the construction of this building structure. The main problem is to ignore the connection structure and the insufficient strength of concrete during pouring. First of all, regarding the connection structure, it is necessary to strengthen supervision and build the connection structure according to engineering standards. In addition, the quality of steel bars and piles is the foundation of building structure system, so it is very important to strictly control the strength of concrete. Choose suitable high-quality sand and gravel aggregate, and don't cut corners here, otherwise the loss will outweigh the gain. After accurate calculation and repeated calculation, the scientific matching of orthopedics was verified, and the trial matching experiment was carried out to control the key data such as water cement ratio, water cement ratio and sand content. Practice has proved that when there are only a few shovels of sand and gravel aggregate, the strength of concrete will fluctuate up and down by one grade. Therefore, aggregate must be weighed to ensure the strength of concrete.
4 conclusion
This paper mainly analyzes two kinds of building structures and puts forward some suggestions. As can be seen from the above, the main problem of building structure construction is the construction quality. In order to improve the quality of construction projects, we must strictly control the quality of materials and technical links that affect the construction quality. The construction of building structure is related to the quality and safety of the building. Therefore, whether it is material selection or construction technology, we should pay attention to safety. The errors of many subtle factors may affect the safety of buildings. Therefore, this requires the engineering party to attach great importance to the construction process of the building structure, strictly and accurately check the gate, and improve the overall level of building quality in China.
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