一种墩身φ75mm预应力粗钢筋的张拉施工方法
By employing a two-stage tensioning and grouting process, the deviation problem in the construction of prestressed steel bars with a diameter of φ70mm or larger was solved, achieving high-precision tensioning and high-quality construction of the pier body, while reducing prestress loss and cracking risk.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CCCC FIRST HARBOR ENGINEERING CO LTD
- Filing Date
- 2024-01-25
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the construction of prestressed steel bars with a diameter of φ70mm or larger is difficult, and unreasonable deviations are prone to occur during tensioning, making it difficult to achieve good prestressing effect and compactness, and the prestress loss is relatively large.
By employing a construction method involving two-stage tensioning, and designing special tensioning steps and parameters, combined with C50 concrete pouring and admixture cement grouting, the tensioning accuracy and quality of φ75mm prestressed steel bars are improved, the tensioning elongation and stress value deviation are reduced, and the fullness and density of the ducts are enhanced.
By precisely controlling the tensioning process and grouting technique, the tensioning accuracy and quality of φ75mm prestressed steel bars were improved, prestress loss was reduced, cracking of the pier body was prevented, and the service quality and strength of the pier body were enhanced.
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