Recently, in GuangzhouNanshaIn the case of the collapse of the Lixinsha Bridge, some non-professionals have made a wrong analysis of the cause of the incident, which has caused a lot of misinformation. As a person with ten years of experience in bridge buildingFarmersI want to tell you that there are no problems with the quality of this bridge. Some of the doubts on the web focus on two main aspects: first,BridgesThere are no small steel bars in the fracture, but two iron rods with thick bowls. Actually, yesBridgesYou don't know anything about it.
The part circled in red in the diagram is:Prestressed steel wireAnchors, and not a severed head of an iron rod that was mistaken for. Secondly, many people questionBridgesWhy would a vehicle designed to withstand hundreds of tons be broken by a ship? Again, this is a mistake of inertial thinking. BridgesThe design is primarily concerned with bearing downward loads, rather than horizontal thrust, which is generally relatively small under normal circumstances. So,BridgesIt is usually "pressure-resistant but not side-thrust". Moreover, the bridge was deliberately designed to be prefabricated in sections andCharpy beamsIt is to deal with the "abandon the car and protect the commander" function in response to the collision of the ship under abnormal conditions, and ensure the safety of the entire bridge and the ship.
At the same time, I would like to appeal to everyone to stop the irresponsible pace and wait for the official investigation report to be released. After all, build bridgesFarmersThe fact that the engineer has an in-depth understanding of the quality and design principles of the bridge should be more worthy of our trust.
For some non-professionals,Prestressed steel wireAnchorsProbably an unfamiliar concept. However, it's inBridgesThe role in construction is very important. PrestressThe technique is one by applying a pre-calculated one in the componentPrestressto counteract the free stresses caused by the load. WhilePrestressed steel wireAnchorsIt is used to willPrestressed steel wireEquipment fixed in concrete elements.
In the Lixinsha Bridge,Prestressed steel wireAnchorsPlays a role in bearingPrestresskey role. It putsPrestressed steel wireAnchored inBridgesmember, so thatBridgesAble to give full playPrestressrole, increasedBridgesflexural load capacity. In the case of neat fractures and no messy steel bars, we can clearly see itPrestressed steel wireAnchorsexists. Therefore, the cause of the fracture is definitely not a matter of quality, but only a part of the design of the bridge.
The design of the Lixinsha Bridge adopts the prefabricated and sectional fabricationCharpy beamsof the structural form, which not only ensuresBridgesThe efficiency of construction has also been improvedBridgesSafety under stress.
First of all, segmented prefabrication is a construction method that is made into multiple components and then assembled on site. This method greatly shortens the construction time, reduces the dependence on the on-site construction environment, and improves the quality of the project. In addition, segmented prefabrication ensures the quality of each component and reduces human error during construction.
Secondly,Charpy beamsIt's one of a kindBridgesThe support type, which is characterized by the absence of flexural strength at the two fulcrums, makes it:BridgesIt can be deformed more flexibly when it is stressed, and it is improvedBridgesof carrying capacity and safety. And, when a certain paragraphBridgesWhen subjected to an external force, this segmentBridgesIt is possible to "abandon the car and protect the commander", that is, to ensure the safety of the entire bridge and the ship through local damage.
To sum up, the segmented prefabricated andCharpy beamsThe design can not only be improvedBridgesThe efficiency of construction can also be increasedBridgesbending capacity and safety.
In the face of the collision and breaking of the Lixinsha Bridge, we should remain rational and patient and wait for the official investigation report. The official investigation is a key link in the thorough, objective and scientific analysis of the incident, and only through the formal investigation process can we truly understand the cause and truth of the matter.
The release of an official investigation report is of great significance in dispelling the public's doubts and misunderstandings. It can provide accurate information to the general public, increasing the pairBridgesKnowledge of construction and safety. At the same time, the official investigation report can also provide a strong basis and reference for decision-making by relevant parties.
Therefore, we should wait patiently for the release of the official investigation report and trust the findings of professional institutions and relevant experts. Only in this way can we have an accurate and objective judgment of the event and prepare for the futureBridgesConstruction and security provide more useful lessons and lessons.
in GuangzhouNanshaIn the incident of the collision and breaking of the Lixinsha Bridge, some laymen who have no experience in building bridges are rightBridgesThe quality was incorrectly analyzed. However, as a person with ten years of experience in bridge buildingFarmersWorker, let me tell you that there is no quality problem with this bridge. In response to the misunderstanding in the layman's analysis, we explain the role and importance of prestressed steel wire anchors, analyze the segmented prefabrication andCharpy beamsAdvantages of design. At the same time, we stressed the significance and importance of waiting for the official investigation report, and called on everyone to remain rational and patient. Through the release of the official investigation report, we can understand the truth of the incident in an objective and accurate way, for the futureBridgesConstruction and security provide more experience and lessons.