Tube Loading Experiment Hydraulic System
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Product Detail
Faced with the challenges of high internal and external pressure, complex soil coupling effects, and the long-term durability requirements of deep tunnel structures, the company’s engineering team developed an innovative design approach to ensure maximum structural safety and reliability. By integrating multiple working conditions and conducting comprehensive adaptability analyses, the structural performance and ultimate failure characteristics of the segment lining were rigorously validated through repeated hydraulic loading and drainage cycle testing, significantly improving the design’s safety margin under ultra-deep soil environments.
The hydraulic loading system, independently designed by the company, adopts a unique combination of tension and compression modes with 45 precise loading points, achieving an axisymmetric load distribution fully aligned with the design model. An additional 15 loading points are configured to simulate shield jacking force and inter-ring prestressing, ensuring accurate representation of the tunnel’s real stress conditions.
To achieve data accuracy and comprehensive monitoring, the system integrates 1,040 embedded measuring sensors, supported by 3D laser scanning technology that captures tens of thousands of data points — far surpassing conventional displacement measurement methods. Furthermore, advanced binocular DIC digital imaging is employed for real-time crack development analysis, enabling engineers to observe microstructural deformation instantly and precisely.
Notably, for the first time in this field, the company’s R&D team successfully developed an adaptive formation resistance loading system, addressing the increased internal pressure effects unique to deep tunnels compared with ordinary linings. This pioneering system allows verification of formation structure models under various resistance coefficients, offering a more realistic simulation of in-situ geological conditions — a breakthrough achievement demonstrating the company’s strong innovation capability in hydraulic testing and tunneling technology.
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