Segment girder formwork
Segment girder formwork is a specialized system used in the construction of bridges and other structures that involve segmental girders. It provides temporary support and shaping to cast or assemble the segments of a girder until they achieve the desired structural integrity. Below is an overview of segment girder formwork:
Key Features
Customizable Design
Formwork is tailored to match the shape and size of the girder segments, ensuring precise geometry.
Load-Bearing Capacity
Designed to withstand the weight of wet concrete and other construction loads.
High Durability
Constructed from materials like steel, aluminum, or wood to endure repeated use and harsh construction conditions.
Ease of Assembly and Disassembly
Modular components make the system efficient for quick setup and removal.
Surface Quality
Provides a smooth finish to the cast segments, reducing the need for extensive post-casting treatments.
Applications
Segmental Bridges
Used in balanced cantilever construction, incremental launching, or span-by-span erection methods.
Precast and Cast-in-Place Segments
Suitable for both precasting in factories or casting in place at the construction site.
Types of Segment Girder Formwork
Internal Formwork
Provides shape to the internal cavity of hollow girders.
External Formwork
Supports the outer surfaces of the segment during casting.
Adjustable Formwork
Allows flexibility for projects involving varying segment sizes or curved geometries.
Construction Process
Setup
Formwork is positioned and secured on supports or scaffolding.
Reinforcement Placement
Steel reinforcements are arranged within the formwork as per the design.
Concrete Pouring
Concrete is poured into the formwork and vibrated to remove air pockets.
Curing and Stripping
After the concrete sets and cures, the formwork is dismantled, leaving the cast segment.
Advantages
Ensures accuracy in dimensions and alignment.
Reduces construction time with modular and reusable components.
Enhances safety and efficiency at the worksite.
