后张法预应力张拉伸长值计算与偏差原因分析

摘要

通过后张法张拉工艺原理,结合现场施工实际经验,分别从预应力钢束理论伸长值和实际伸长值的计算方法,分析了后张法预应力钢束伸长值偏差的原因并提出了解决和预防措施,确保预应力张拉的有效拉力满足规范和设计要求,以保证工程的质量.%According to the principle of post-tensioning technology and the practical experience of field construction, based on the calculation methods of theoretical and actual extension value of prestress steel strands, the causes of the deviation of prestress steel strands are analyzed, and the solutions and preventive measures are put forward to ensure that the effective tension of the prestressing force meets the specifications and design requirements to ensure the quality of the project.