Upper seat plate Composed of top plate and stainless steel plate, it is fixed to the pier by anchor bolts to ensure the stability of the support. The combination of stainless steel plate and polytetrafluoroethylene plate achieves low friction horizontal displacement. Lower seat plate Includes polytetrafluoroethylene plate, intermediate steel plate, sealing ring, rubber block, and

Construction Organization Optimization Construction in different time periods: Priority should be given to nighttime or low traffic periods to reduce interference with daytime traffic.Segmented homework: Divide the bridge into multiple construction sections, replace the bearings section by section, and avoid the entire bridge being closed.Rapid construction: Automated lifting equipment (such as SPLC-8 fully automatic hydraulic

Structural force balance control is challenging Lifting risk: If the beam is lifted unevenly, it may cause cracks or deformation, especially for large-span bridges. Operational accuracy: Multiple jacks need to be synchronously controlled, and any slight deviation may affect structural safety. The contradiction between the demolition of old supports and limited space is prominent Corrosion

appearance quality The surface shall be flat, free from defects such as cracking, missing adhesive, or sponginess, and the eccentricity of the center hole shall not exceed one-third of the tubular cross-sectional thickness. Allow no more than 4 defects such as dents, bubbles, and impurities with a depth ≤2mm and area ≤16mm². On the designed

Basic inspection Appearance Quality: Inspect the surface for flatness, ensuring no defects such as bubbles, cracks, missing adhesive, or spongy textures. Bubbles with a diameter ≤1mm must not exceed 3 per meter; impurities with an area ≤4mm must not exceed 3 per meter. Dimensional tolerance: The measured dimensions such as width and thickness must comply

Material Inspection and Preparation Before installation, verify the warranty certificate of the waterstop, check whether the thickness and hardness meet the design requirements, and ensure the surface is free of cracks, bubbles, or impurities. Positioning and laying out Mark the centerline of the waterstop according to the drawing, with an error of less than 5mm,

Preparations before installation Inspect materials: Verify the quality assurance certificate of the waterstop, and check whether the thickness and hardness meet the design requirements.Positioning and Marking: Mark the centerline of the waterstop according to the drawings, with an error tolerance of <5mm.Base treatment: Remove oil stains and floating mortar from the concrete surface to ensure