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Liuzhou Yuqiao Prestressed Engineering Technology Co., Ltd.

Yuqiao Prestressed Intelligent Control Tensioning System

Release date:

2020-05-27

Our company has introduced a prestressed intelligent control tensioning system and a large-cycle grouting system, enabling digital, automated control of both the prestressing tensioning and grouting processes. This ensures precise, meticulous construction of prestressed elements. Additionally, we actively conduct real-time monitoring and process-based acceptance checks during bridge prestressing work—crucial steps to maintain the intended level of prestress in the bridge structure, prevent cracking and excessive deflection in prestressed bridges, and ultimately guarantee optimal driving comfort, as well as the long-term safety and durability of the bridge.

Yuqiao Prestressed Intelligent Control Tensioning System

Traditional prestressing tensioning methods typically rely on directly controlling the tension force during the process by reading the pressure gauge on the tensioning equipment. However, conventional tensioning tools often suffer from unstable pressure gauge readings and significant control errors in the oil pressure readings. Additionally, the elongation of the prestressing tendons is monitored manually using a steel ruler, which introduces considerable variability and measurement errors. As a result, achieving precise tensioning accuracy with traditional methods is extremely challenging—yet accurate prestressing tensioning is critical, since improper tensioning can lead to structural failure or damage. Moreover, the conventional grouting method relies on manually operated single-piston grout pumps mixed with standard mortar, leading to several inherent drawbacks:

First, there is insufficient control over material quality and dosage. The grouting material requires a low water-to-cement ratio, high fluidity, and zero bleeding. However, during the grouting process, workers on-site often add water to improve the slurry's flowability, inadvertently increasing the water-to-cement ratio beyond the specified limit. This leads to excessive bleeding, creating an environment within the duct that promotes corrosion of the steel strands.

Second, the grouting equipment is outdated—specifically, the original mixer’s impeller has an insufficient linear velocity, making it impossible to produce a slurry with a low water-to-cement ratio and high flowability. Additionally, the grouting pump suffers from unstable pressure, which often leads to air pockets forming within the ducts during the injection process.

Third, organizational management was lax, with insufficient awareness of the risks associated with inadequate grouting. There was no real-time measurement, control, or remote monitoring of the grouting process, leading to significant human-induced variability and compromising the reliability of the data.

Our company’s advanced prestressed intelligent control tensioning system and large-cycle grouting system enable digital, automated control of the prestressing tensioning and grouting processes. By rigorously implementing precision construction techniques for prestressing, we actively conduct real-time monitoring and process-based acceptance checks during bridge prestressing work. This approach ensures that the designed level of prestress in the bridge structure is maintained, effectively preventing cracks and excessive deflection—critical issues that could compromise both the structural integrity and long-term durability of the bridge. Ultimately, it guarantees optimal driving comfort while safeguarding the safety and longevity of the bridge.

For procurement inquiries, please contact Manager Wei at 13978068222.