With the rapid development of transportation infrastructure construction in China, the precision requirements for prefabricated components in bridge and tunnel engineering are becoming increasingly stringent. This client is a leading road and bridge construction enterprise in China, responsible for the construction of multiple cross river sea super large bridges and tunnel groups in mountainous and hilly areas.
In the traditional construction mode, prefabricated bridge piers, tunnel segments, and large supports often cannot be assembled smoothly on the construction site due to "tolerance exceeding limits", which not only delays the construction period but also increases huge costs. In order to control quality from the source, the unit has established an intelligent testing center and urgently needs a specialized equipment that can simulate the on-site stress state and accurately measure the assembly tolerance of large components.
In large-scale bridge and tunnel projects, prefabricated components such as pipe segments and bridge piers are large in size and heavy in weight.
1. High rework cost: If dimensional deviations (tolerance exceeding the standard) are found during lifting, resulting in inability to assemble or excessive gaps, it often requires the use of a large crane for renovation, with a single cost of several hundred thousand yuan.
2. Outdated detection methods: In the past, steel rulers were often used to measure on flat ground, which could not simulate the fitting clearance of components in a truly "tight and compressed" state.
3. Insufficient equipment load capacity: Ordinary press machines have limited space and cannot accommodate such large curved surfaces or heavy block shaped bodies.
Equipment definition: What is a bridge and tunnel assembly tolerance test bench?
This is a type of non-standard customized equipment that integrates geometric measurement and mechanical performance. It is different from ordinary press machines, and its core function is to:
1. Space dimension measurement: Simulate the original geometric dimensions and positional tolerances (such as perpendicularity and flatness) of the component before being subjected to force.
2. Simulated assembly: By using hydraulic servo loading, simulate the stress state of components in engineering practice, measure their deformation under load, and verify the matching of assembly interfaces.
The core logic of this XGGC-327 test bench is "simulated assembly" - simulating unfavorable stress conditions on the construction site and measuring the assembly tolerances of components before leaving the factory.
1. Large space+mobile car (solving the problem of "getting in"):
By utilizing large-span space and mobile carts, pipe segments or prefabricated components can be easily pushed into the testing center. The clear and visible track traces on the ground in the picture demonstrate the efficient flow design of the equipment.
2. Precise servo pressure (solving the problem of "accurate measurement"):
Apply a load equivalent to the actual assembly force through the top oil cylinder, and measure deformation through high-precision displacement sensors under this pressure. This can accurately detect the flatness, verticality, and deformation of the component under stress.
3. Anti fall safety lock (solving the problem of "being able to withstand"):
For heavy specimens, the equipment is equipped with high-strength anti fall devices to ensure that in the event of accidental rupture, falling objects will not harm the main body of the equipment, ensuring the safety of personnel and assets (which is particularly important when handling concrete pipe sections).
1. Model structure: Four column large-span frame, strong expandability, high stiffness, and small deformation
2. Load bearing system: rail mobile trolley+large load platform, solving the problem of handling overweight specimens
3. Control system: servo closed-loop control, precise simulation of assembly pressure
4. Safety design: multiple limit protection+anti fall device
5. Scope of application: Tunnel segments, prefabricated bridge piers, large supports, prefabricated building connectors
For national level projects such as bridges, tunnels, and pipe galleries, the accuracy of each large prefabricated component determines the safety baseline for a hundred years. Jinan Xinguang XGGC-327 Bridge and Tunnel Assembly Tolerance Test Platform, with the wisdom of non-standard customization, has solved the industry problem of "inability to enter, inaccurate measurement, and unsafe" in the inspection of oversized components.
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