Cantilever Bridge

General Overview

The Cantilever Bridge (CLB) was designed with an emphasis on safety, reliability, ease of operation, easy replaceability of components, low maintenance and high endurance.

  • The CLB crane carrier is designed to accommodate cranes of various sizes. The track motors of the crane are connected directly to the hydraulic motors of the bogies. This simplifies the operational requirements of the crane.
  • The CLB is equipped with two Jenmon Gantry Cranes with a S.W.L of 70MT Ea. The gantries travel across the railing on the CLB main girders and are utilized to install the roadway. They can also be utilized to offload the structural components onto the trestle before the main crane can install them.
  • The Main Piling Template of the CLB is designed to have 3-axis motion and can install batter piles of various sizes and lengths. The template is controlled with a Hydraulic Power Unit installed on the CLB Platform.
  • The CLB has a Side Piling Template with an upper and lower piling guide installed. The side piling template is capable of installing vertical piles of various sizes and the hydraulically operated guides allow for corrections up to 250mm in all directions.
  • The Self-Propelled Trailer (SPT) is used to transport all structural components upto 70MT and other materials from the laydown to the CLB and back. All wheels of the SPT can be hydraulically steered and locked and the driver can operate the vehicle from the cabins installed on both ends.
  • 3 sets of roller boxes support the main girders at all times. There are 6 x 100-XT and 6 x 300-XT Hillman roller boxes available. The 300MT roller boxes have side rollers as well to keep the CLB aligned while in motion.
  • On the sides of the main girders there are multiple outriggers to support offices, lunch rooms storage containers, generators and any other auxilliary equipment which are required on day to day basis.
  • There are multiple work platforms available which hold onto the piles through friction to provide access to work areas over water.

Dimensions & Weights

The CLB main frame is the core structure (box girder, transverse beam, portal frame) to which all the other structures are connected. It sits on three headstocks spaced 24m apart and can construct roadways up to 4.6m wide.

  • Total deadweight (excluding main crane) : 700MT
  • Length : 75m
  • Width (c.t.c.) : 6.4m

Two spud piles are placed in jacking houses near the front of the CLB on the outside of the bridge girders. The spud piles serve as temporary supports for the front of the CLB until the permanent structure is completed and the CLB load is transferred to it. The capacity of the 1.5m stroke jacking system for each spud pile is 250t, which exceeds the required maximum preloading force of 220t.

  • Spud pile dimensions : Ø1.22m x 36m (ea)
  • Maximum jacking capacity : 250MT (per spud pile)
  • Jack House Max. Stroke : 1.5m

Questions? Get in Touch




    CLB Dimensions

    • Overall length: 80 meters
    • Centre-to-centre of main girders: 5.66 metres
    • Main girders cross section: height 1.85 x width 1 metres
    • Free width between main girders allowing for 4.3-metre trestle roadway
    • Bolted connections resulting in a maximum transport length of 39 metres • Cyclone-resistant

    CLB Equipment

    • Omni-directional front piling frame
    • Side piling template for piles (piperack support)
    • Side piling extension template for loop platform piles and passing bay piles
    • Hydraulically operated pile guides on all piling frames
    • Spud piles 48 meters with hydraulic jacking system
    • Two gantry cranes with 6.4-meter span and 70-tonne lifting capacity, height of lifting 5-meters above rail
    • Generators and hydraulic power packs
    • Two winches for forward movement of the cantilever bridge
    • Various platforms and structures to support smaller equipment
    • Walkways and safe access to all work fronts and equipment
    • Workshop, store, office and crib facilities
    • Hilman rollers for forward movement of cantilever bridge
    • Piling hammers and followers with purpose-built parking frame
    • WorkSafe-approved welding platforms
    • Stringer beams for longitudinal load transfer