Tuen Mun to Chep Lap Kok Link, Hong Kong - Segment lifting gantries

in 2016 DLT supplied hydraulic jacking systems to Gammon Construction in Hong Kong, for use in a number of viaduct segment erection gantries. The hydraulic jacking system for each gantry comprised a 185 tonne or 294 tonne strand jack, secondary rams to the gantry and lifting beam, power pack and control system. Our scope also included assistance to Gammon with the conceptual design of the gantries and site supervision and training.

Gammon promotional video showing the working sequence for the segment lifting gantries.

The gantry in Travelling Hanger Beam (THB) and K-frame configuration has 1 No DL-S185 / DL-S294 strand jack to lift bridge deck sections weighing up to 250te. The gantry has various automated features using Dorman Long Hydraulics and Control System:

Designed to lift deck sections weighing up to 250te using Dorman Long Strand Jack.
Hydraulic Rams for the transverse and longitudinal movement of the deck sections once lifted.
Cross fall and gradient adjustment rams installed to the lifting beam for the fine alignment of the deck sections before installation.
Deck sections can be rotated by 180 degrees after being lifted from the barge / SPMT.
The K frame gantry can straddle carry the deck sections over long distance using hydraulic rams moving at high speed.
Each gantry has 4 No screw collar feet load transfer rams which can hydraulically balance the gantry during longitudinal movement.

The difference between K-frame and THB gantry is that the K-frame has additional capability to straddle carry the segments from one location to another when the segments cannot be delivered directly under the final location of erection.

THB Gantry... Viaduct Gantry

K-frame Gantry. Viaduct Gantry

Lifting frame with Segment Gradient and Cross fall adjustment rams. Viaduct Gantry

DL-S185 strand jack for vertical lifting of segments. Viaduct Gantry

Dorman Long Supervisor assisting Gammon during equipment commissioning. Viaduct Gantry