In the field of bridge construction, there is a seemingly small but vital component - bridge supportUnload the block。The role of the unloaded block is like a "smart joint" in the bridge construction process, which greatly improves the construction efficiency and project quality while ensuring the safety of the structure.
First of all, we need to understand the role of the bridge bracket, in the bridge construction stage, especially in the prestressed concrete continuous beam bridge or cantilever cast beam bridge and other projects, the bracket system is an important facility to temporarily support the main structure of the bridge, which carries the weight and construction load of the entire prefabricated part of the bridge. When the main structure of the bridge is completed and reaches the design strength, it is necessary to transfer this part of the temporary load to the bridge autostructure in a scientific and orderly manner.
At this time, the bridge support unloading block plays its core function. The unloading block is usually installed at the contact part between the bracket and the bridge structure, and with the advancement of the bridge construction process, according to the predetermined sequence and steps, the support force of the bracket to the bridge is gradually reduced by adjusting the unloading block, until it is completely disengaged, and the stable and safe unloading of the bracket is realized. This process is called "stent removal".
Specifically, the design of the drop block needs to have the following characteristics:
1.Adjustability: According to the needs of the project, the unloading block should be able to accurately adjust the height of the stress point to ensure that the unloading process is smooth and stable.
2.Load-bearing capacity: The unloading block must have sufficient load-bearing capacity to withstand the huge loads transmitted by the bracket and effectively distribute these loads to the main structure of the bridge.
3.Safety: The design should fully consider the various situations that may occur during the construction process to ensure the safety of the bridge structure and construction personnel under any working conditions.
By using the bridge support unloading block, the construction unit can accurately implement the support unloading work under the premise of strict risk control, so as to avoid the sudden stress change or even damage of the bridge structure caused by too fast unloading, so as to effectively protect the structural integrity of the new bridge. At the same time, the reasonable application of the unloading block can also improve the construction progress, save the construction period, reduce the cost, and reflect the excellent economic benefits and technical value.
To sum up, as an important link in bridge construction technology, the scientific and reasonable design and application of bridge support unloading block have a non-negligible impact on the overall quality, safety and construction efficiency of bridge engineering. In a sense, they are obscure guardians who play a vital role in the transition of the bridge from blueprint to reality.