Bridge Construction Always Overturns? The Advantages And Disadvantages Of 3 Types Of Bridge Formwork Are Explained Clearly, So There Are No Pitfalls When Selecting Materials.

Bridge construction always overturns? The advantages and disadvantages of 3 types of bridge formwork are explained clearly, so there are no pitfalls when selecting materials.

The cause of bridge pouring problems has been found

Concrete with pitted surfaces, concrete with leaking joints, and concrete with deformed components. The first reaction of many construction workers is that the pouring process is defective. In fact, after detailed investigation of the technical specifications for riveting and welding of Q345 steel plates for bridges , it can be found that the root cause is often in the formwork. Since the formwork is a direct load-bearing object formed by concrete, inappropriate selection of materials or irregular use are the driving force behind the emergence of various common quality problems.

In engineering practice, the same type of problems will appear repeatedly in many projects, and rectifications are carried out repeatedly, but only the symptoms are treated but not the root cause. If the formwork itself lacks rigidity, the joints are not tight, or the release agent is not applied properly, problems will inevitably occur after the concrete is poured. Selecting the right formwork and standardizing the construction are the first steps to ensure the quality of bridge components.

The role of formwork in bridge engineering

The bridge formwork, which is responsible for the two important tasks of forming and load-bearing, has the primary function of shaping. It must be accurately formed according to the construction drawings to ensure that the piers, cap beams, box beams and other components have good dimensions and neat lines. This will have a direct impact on the appearance quality and structural safety of the bridge.

At the same time, the formwork needs to withstand the lateral pressure of the concrete and the vibration impact force. If the stiffness is insufficient or the reinforcement is not strong, serious quality problems such as mold running, mold expansion, deformation, etc. may occur, and even safety accidents may occur. A good-quality formwork system can achieve standard molding in one go, reducing the workload of subsequent repairs.

Analysis of the advantages of Q345 steel formwork

Q345 steel plate is one of the most widely used formwork materials in current bridge projects. This steel has high strength, good toughness, and outstanding welding performance. It can meet the stringent requirements for formwork stiffness and stability of bridge components. The steel formwork made of national standard Q345B steel has tight seams and can effectively prevent slurry leakage.

Formwork made of Q345 steel plates through riveting and welding can be turned over 50 to more than 100 times. Under normal use conditions, the concrete surface is smooth and smooth, and secondary repairs are basically not required. For high-standard projects such as high-speed rail, cross-sea bridges, and highways, shaped steel formwork is the best choice for the construction of core components of bridges.

Limitations of other template materials

Traditional wooden formwork is relatively cheap and can be cut at will. However, it has poor stiffness and is prone to deformation when exposed to water. Its turnover times are only three to five times. Problems occur frequently during construction on rainy days. The concrete surface is prone to defects. This type of formwork is only suitable for small bridges or temporary projects.

The plastic formwork itself is light in weight, has waterproof and moisture-proof properties, and is easy to demould. However, its rigidity and bearing capacity are significantly less than the technical specifications for riveting and welding of Q345 steel plates for bridges . It is only suitable for low-load small components such as bridge guardrails and simple caps. It definitely cannot be used in key load-bearing parts such as high bridge piers and long-span box girders. Blind selection will bury quality risks.

Riveting and acceptance technical requirements

Templates should be made in strict accordance with the specifications and standards. The steel plates selected are mainly Q345B bridge riveting technical specifications for Q345 steel plates . The welds are full and uniform, and the riveting is firm and there is no looseness. After the assembly is completed, the board surface should remain flat and free of rust, the seams should be tight and there should be no obvious misalignment, and the overall geometric size error should be controlled within the allowable range.

Before construction, the board surface must be cleaned and the release agent evenly applied. During installation, the verticality and joint quality must be strictly controlled. The reinforcement support system must be in place. After the formwork is removed, it must be cleaned and maintained in time. The steel formwork must be rust-proofed. This can effectively extend the turnover service life and reduce the overall cost.

How to scientifically choose template solutions

There is no material selection suitable for any place in construction. Large-scale bridge projects with high standards should first use Q345 steel formwork to ensure structural quality and construction progress; for small temporary projects or special-shaped component construction, traditional wooden formwork can be considered to reduce costs; simple low-load scenarios can use plastic formwork.

Selecting materials and cooperating with standardized construction operations can avoid most common problems in bridge construction quality. If the formwork is properly selected and the construction process follows specifications, problems such as pitted surfaces, grout leakage, and deformation will naturally be reduced. What is the current status of the template types used at your construction site? Please leave a message in the comment area and share your experience.