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Construction of Ramp with
Jenmon Gantry Crane

Tuas West Mass Rapid Transit (MRT) Extension Depot

Challenge - Balancing Act

Tuas West Extension project was awarded to a global construction company in Singapore to construct a 26 hectare MRT depot for Land Transport Authority (LTA) of Singapore.

Together with the design was an area designated for a bus terminal which was approximately 10,000 sq metres. It shall be accessible, primarily, via a ramp structure connecting directly to Tuas West Drive. Alternatively, the site can also be accessible via another ramp structure connecting to Tuas Link 4. Both ramps, with a height similar to 7 storey of a HDB building, shall be constructed solely by a gantry crane. The construction involved putting together precast concretes to form up the sloped platform to the bus terminal.

Note: Image for illustration purposes only.

 

Here's the challenge. Each precast concrete, weighting 27 tons and measured 2.5 metres by 17 metres, required a bold solution to maintain its balance while tilting the precast platform at the right angle. The limited site space also rendered Mobile crane and Tower crane impossible to perform the alignment with just one lifting point.

Then again, despite everything, this was no difficult task for JENMON.

 

Solution - Bold Solution in Construction

Stability was the key to ensure safety during this installation process. It took more than 1 lifting point to maintain balance for the long precast platform, not to mention the need to tilt the 27 tons concrete. We addressed the concerns with our design: 20 + 20 tons Double Girder Gantry Crane with Cantilever Crab Unit.

The gantry crane, spanned 20 metres with height of lift 21 metres, was able to accommodate the entire ramp up to its highest point. This design consisted of three main features to meet the requirement:

Versatile Alignment
Two hoists, fitted on both side of the cantilever crab unit, provided extended versatility while aligning the angle of the precast platform. Using a spreader beam under the hook further enhanced stability.


Portable Power for Reach

Having generator set installed, the gantry crane was equipped with portable power to travel along the 190 metres installation area. This resolved the issue of hard-to-reach places where power was unavailable, significantly saved cost without additional electrical power system.


Ease of Relocation

"Easy to Install, Easy to Dismantle" was one of the main features in JENMON crane. Taking this into account, relocation of the gantry crane to the second ramp site was less of a hassle. Final outcome: Expedited construction.

Results - The Right Partnership

Honored to be part of our client's first project with LTA, Jenmon showcased the best configuration to achieve our client's requirements. This cost effective lifting solution resolved the space constraints issue, resulting higher productivity and safety.

Because most of gantry crane's constituent parts were suspended above the ground, it did not occupy much on the valuable ground space. Whereas for mobile crane, it required even ground to maneuver and deploy, which, at that time, will took another few months to complete. Also, with the cantilever crab unit to lift both end of the platform, the possible boom collision issue of using mobile crane or tower crane was resolved.

Incredibly, during the preliminary study, the mobile crane was estimated to take over 12 months to complete verse this design, which took only six weeks to complete.

From initial installation, construction of ramp to later dismantling, JENMON Gantry Crane proved to be a safer and easier alternative, particularly when handling the heavy and long precast. It reduced risk in lifting operations, saved cost from equipment rental and, ultimately, speed up the construction. Still more innovations had been offered by JENMON even within the context of individual applications. Especially in construction industry, the applications for cranes can vary widely from project to project. Therefore, it is important to acquire the right partner for the best results.

 

Senior Engineer, Jurong Primewide
"Project Engineer displayed strong technical knowledge, which flourish the communication during the project."

 

Our aim is to ensure an operative crane on site at all times.

"Jenmon is made up of veterans with years of experience in the lifting industry. We are constantly updated with the latest market products, solutions and technologies, enabling us to provide solutions to suit all varieties of industrial lifting and handling systems. From the very first contact to maintenance, our team has the complete range of services tailored for you. "

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