The key points for assembling corrugated plates for bridges, tunnels, and culverts are to design the construction process by assembling the corrugated plates, organizing the order of each piece reasonably, and designing the size of the plates to facilitate transportation and installation while minimizing the number of bolts; Try to deviate the connection position from the location where equivalent stress and tangential stress are concentrated as much as possible; Tangential stress controls bolt shear stress.2Precautions for assembling corrugated culvert pipes for bridge reinforcement: Firstly, prepare installation tools, simple lifting equipment, socket wrenches, fixed torque electric wrenches, fixed torque wrenches, sufficient footrests, springboards, and construction site power supplies. Pre installation work: Check the bottom elevation and longitudinal slope of the steel corrugated pipe culvert; Determine the position, central axis, and midpoint of the corrugated culvert pipe. Assemble the bottom steel corrugated plate: Using the center axis as the reference, position the first corrugated plate and extend it from this point to both sides until the two ends are reached. The overlap length is50mmAlign the connecting hole, insert the bolt into the hole from the inside out, put a washer on the outside and tighten the nut with a specific air cannon socket wrench. Assembling arched steel corrugated pipes: assembled in sequence from bottom to top: the circumferential connection adopts a stepped shape, with a lap length of50mmThe connection seam between the upper two plates is misaligned with the connection seam between the lower two plates. After aligning the connection holes, a bolt is inserted into the hole from the inside out, and a specific tool, an air cannon socket wrench, is used to pre tighten the nut. When assembling the circular ring in the circumferential direction, measure the cross-sectional dimensions, adjust the pre tightening bolts in a timely manner, correct the top corrugated plate during assembly, and ensure that the cross-sectional dimensions meet the requirements.
The construction of national highways, provincial highways, county-level highways, railway culverts, and the repair of cross river bridges and high-speed railway tunnel sections using corrugated steel plate culverts often suffer from varying degrees of damage due to climate, geological changes, vibration, oxidation erosion, overload, and other reasons. The use of corrugated steel structures (corrugated steel pipes, arch structures, and corrugated steel box culverts) to reinforce, widen, or rebuild existing structures can significantly save construction costs and facilitate future expansion and replacement, thereby extending the service life of the project.
Working principle of steel corrugated culvert pipe:
According to the cross-section of the tunnel or culvert, corresponding corrugated steel structures can be customized. The two ends of the corrugated plate are equipped with L-shaped flanged flanges, and there are limit edges on both sides of the corrugated plate for positioning the bent edges of adjacent corrugated plates. By filling the corrugated steel structure with grouting material between the corrugated steel structure and the original tunnel or culvert, the two can be regarded as a whole load-bearing structure, greatly improving its bearing capacity and seismic performance, and extending its service life.
