Prefabricated Beam Girder Bridge For Highway Flyovers Overcrossing Structural

Overcrossing Structural Prefabricated Steel Box Girder Bridge For Highway Flyovers

Description

Steel Box Girder Bridge refers to a beam bridge whose main beam is in the form of a thin-wall closed section. Long hollow trusses made of steel or concrete are usually used as beams. This makes the bridge light and sturdy. Bridges constructed using this method are called Steel Box Girder Bridge.

Specification

Steel box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Although normally the steel box girder bridge is a form of beam bridge, box girders may also be used on cable-stayed bridges and other forms.

Application

Spans from 3.6m to 31m and more - for highways, railways, pathways, bicycle racks, landscaping, etc

Standardized designs - as per Indian BIS a. RC standards and codes

Heavy live loads with high overfills - capable of supporting heavy freighter aircraft and mining haulers

Smooth approaches - from earth embankments due to soil overfill, does not require any approach slab

Low life cycle costs - traffic runs on overfill and not over an exposed bridge deck

Aesthetic structures - the true arch form is accentuated.

Construction
For steel box girders, the girders are normally fabricated off site and lifted into place by crane, with sections connected by bolting or welding. If a composite concrete bridge deck is used, it is often cast in-place using temporary falsework supported by the steel girder.

Either form of bridge may also be installed using the technique of incremental launching. Under this method, gantry cranes are often used to place new segments onto the completed portions of the bridge until the bridge superstructure is completed.

Advantage
Reduces the slab thickness and self-weight of bridge
Cost effective
Greater strength per unit area of concrete
Quality assurance, as precast girders are made off-site

Features
Modular, pre-engineered, pre-fabricated bridge system
Standard interchangeable components
Highly adaptable, fully reusable and re-locatable
Transported in standard ISO containers
Quick and simple to build using labour
Fully galvanized for long life and minimum maintenance
3.048m module length
4.2m single lane
Proprietary steel decking systems to suit different loading requirements
Durbar finish or factory applied anti-skid surfacing
Full highway load carrying capability
Simple, cost effective foundations

Our company

Our experienced team is focused on your steel bridge project's success, from start to finish. Our proven ability to identify and overcome design inconsistencies, potential problems with erection, and shipping obstacles results in the fabrication of structural steel that is right the first time, helping you avoid costly construction delays.

Finally

The success of the Bailey bridge was due to the simplicity of the fabrication and assembly of its modular components, combined with the ability to erect and deploy sections with a minimum of assistance from heavy equipment. Many previous designs for military bridges required cranes to lift the pre-assembled bridge and lower it into place. The Bailey parts were made of standard steel alloys, and were simple enough that parts made at a number of different factories could be completely interchangeable. Each individual part could be carried by a small number of men, enabling army engineers to move more easily and more quickly than before, in preparing the way for troops and materiel advancing behind them. Finally, the modular design allowed engineers to build each bridge to be as long and as strong as needed, doubling or tripling up on the supportive side panels, or on the roadbed sections.