1) The initial positioning error of the bolt is primarily due to the sagging of the rope used during installation and measurement. 2) When pouring concrete, the main ribs connected to the bolts are subjected to impact loads, causing them to sink and subsequently pulling the bolts down with them. To prevent such issues, construction measures must strictly follow the fundamental principles of initial control, and careful adjustments should be made to the control survey results to ensure accuracy.
The precise positioning of the bolts is ensured through a series of well-controlled construction processes. Each step in the process plays a crucial role in maintaining the overall accuracy of the structure.
During the line marking phase, it's essential to maintain the accuracy of each individual step. Baselines required for accurate alignment must be established promptly. In addition, to guarantee the precision of the line-off measurements, on-site surveying personnel must receive proper training on the correct use of instruments and steel rulers. Regular calibration of equipment and verification of measuring tools are also necessary to ensure reliable and accurate measurement results.
The steel bar project requires strict control over the dimensions of the rebars to ensure that the binding process is accurate. Experienced personnel should be assigned to oversee the processing, and regular or random sampling should be conducted. Implementing a system of rewards and penalties can help maintain high-quality standards in steel work. To prevent displacement of the base of independent equipment, appropriate preventive measures must be taken, including crack-resistant reinforcement. In cast-in-place concrete structures, a "post-casting belt" is often incorporated into the design to reduce temperature stress and shrinkage deformation during the curing process, thereby improving the structural integrity and long-term performance.
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