MND to release details on underground space masterplan

Hoe Yeen Nie Channel NewsAsia 2 Jan 12;

SINGAPORE: In land-strapped Singapore, underground space has been named a strategic resource by the high-level Economic Strategies Committee.

A masterplan is in the works to map out possible uses and the Ministry of National Development said details will be released this year.

Underneath the bustling Chinatown lies a vast labyrinth of interconnected tunnels snaking across Singapore.

The Downtown railway line, which is being built entirely underground, is part of a decades-long push to go down under in search of space.

The result is a subterranean world teeming with activity.

At the basement level, there's a complex network of utility pipes, electrical grids and pedestrian linkways.

The Common Services Tunnel, which is located five to 10 metres deep, is a system of tunnels designed to house utility services in the Marina Bay area. Built in 2006, the facility allows for the maintenance and repair of utility, sewage and electrical pipes through specially-constructed access points, without having to disrupt traffic above ground.

And 15 to 20 metres deep are the MRT lines and the Marina Coastal Expressway.

Just below that, at the 20 metre to 60 metre level, the Deep Tunnel Sewerage System delivers waste water to an underground treatment plant in Changi.

Over at Jurong Island, the Jurong Rock Cavern is being built at about 150 metres below the island.

And somewhere in the deeper, darker depths, is the Ministry of Defence's ammunition facility located under Mandai quarry.

But not all of Singapore has rock that is solid enough for cavern developments.

Most of it is in the west and central parts of the island lying about 100 metres deep.

In the west, there is sedimentary rock while hard granite is found in the central Bukit Timah region.

Thus, the first step is to create a geology office to know where the good rock is located in Singapore.

The Singapore Geology Office, which is located within the Building and Construction Authority, was set up in April 2010. Its aim is to create a database of information on Singapore's geology, to facilitate future underground developments.

Most information on Singapore's geology derives from a national survey done in 1976 although the information was updated in 2009. Government agencies and developers looking to build underground either referred to these sources, or commissioned their own studies.

Building and Construction Authority's Geological Office assistant director, Kiefer Chiam, said: "The existing information is quite shallow because it's mainly targeted at infrastructure works like MRT, services or building basements. There isn't much information at deeper levels like 100 metres or more.

"In order to support the underground masterplan, we need to know where the good rocks are."

In the immediate term, the focus is on adding more basement-level services like shopping malls and linkways.

But as underground construction incurs huge costs, a masterplan is needed to coordinate future uses and integrate them with structures above ground.

Adele Tan, Deputy Director of Planning Policies at Urban Redevelopment Authority (URA), said: "Those are things we have to sort out amongst the agencies. We work closely with each other on it. And where there are conflicts, we have to talk it through and see what are the most optimal alignment and the most cost-effective alignment.

"As we build more things underground, there will be more competing uses and more conflicts of space. Some of these uses that come later may find that they have to go even deeper to avoid some of the uses that are already there in the shallower surfaces."

The challenge of building undergound is not just a technical one. There is also the issue of land rights to consider. In cities like Helsinki for example, private ownership of subterranean land is limited to a certain depth. But in Singapore, the law gives private owners rights to the land stretching all the way down.

It is not a problem currently because the Rapid Transit Systems Act gives rail authorities the right to go through private land. But this may have to be reassessed along with other regulations such as safety codes and utility plans.
Ms Tan said URA is studying other cities for models it can adapt.

URA is also studying how other cities pay for underground developments. In Japan for instance, the government shares the cost with private developers. Unlike places like Hong Kong, Norway and Japan, Singapore's good rock is buried deep underground, and are much more expensive to access.

Ms Tan said: "As we have a better understanding of our space underground, we can then develop this underground space plan progressively. We can identify suitable uses to put underground and put them in the right places as well, so that we can save land."

Singapore's subterranean expansion is still in its early stages.

Urban planners are laying the ground for future development, a process that will take years.

And if they succeed, it will open up many more possibilities on how Singaporeans use the space above to live, work and play.

- CNA/fa

Masterplan in the works to probe deeper underground
Hoe Yeen Nie Today Online 2 Jan 12;

SINGAPORE - A masterplan is in the works to map out possible uses of underground space, named as a strategic resource by the high-level Economic Strategies Committee in land-strapped Singapore. The Ministry of National Development said details will be released later this year.

The first step, the authorities said, is to create a geology office to know where the good rock is located in Singapore. "The existing information is quite shallow because it's mainly targeted at infrastructure works like MRT, services or building basements. There isn't much information at deeper levels like 100m or more," said the Building and Construction Authority's Geological Office assistant director Kiefer Chiam.

The Singapore Geology Office, located within the authority, was set up in April 2010 with the aim of creating a database of information on Singapore's geology to facilitate future underground developments.

Most information on Singapore's geology derives from a national survey done in 1976 although the information was updated in 2009. Government agencies and developers looking to build underground either referred to these sources, or commissioned their own studies.

As underground construction incurs huge costs, a masterplan is needed to coordinate future uses and integrate them with structures above ground.

Ms Adele Tan, deputy director of Planning Policies at the Urban Redevelopment Authority (URA), said: "As we build more things underground, there will be more competing uses and more conflicts of space. Some of these uses that come later may find that they have to go even deeper to avoid some of the uses that are already there in the shallower surfaces."

The challenge of building undergound is not just a technical one. There is also the issue of land rights to consider. In cities like Helsinki, for example, private ownership of subterranean land is limited to a certain depth. But in Singapore, the law gives private owners rights to the land stretching all the way down.

It is not a problem currently because the Rapid Transit Systems Act gives rail authorities the right to go through private land. But this may have to be reassessed along with other regulations such as safety codes and utility plans.

Ms Tan said the URA is studying other cities for models it can adapt. It is also studying how other cities pay for underground developments.

In Japan, for instance, the government shares the cost with private developers. Unlike places like Hong Kong, Norway and Japan, Singapore's good rock is buried deep underground, and are much more expensive to access. Hoe Yeen Nie

Govt studies possibility of underground science city
Hoe Yeen Nie Channel NewsAsia 2 Jan 12;

SINGAPORE: A study of an unprecedented scale is taking place beneath the Singapore Science Park, in the western part of the country. It is for a science complex, about 30 storeys below the surface at the 80 to 100 metre layer, to house research labs, offices and a data centre.

The area being studied lies between Science Parks 1 and 2, and the objective is to link the underground science city to facilities above. The feasibility study is expected to be completed by April 2012.

Developer JTC Corporation describes the project as an expensive experiment, but one that is perhaps inevitable, as land here becomes increasingly scarce.

David Tan, Assistant CEO of JTC Corporation, said: "By putting an underground science city between Science Parks 1 and 2, we could actually have two plots of land for development - one at the bottom, underground; the other one on top. The key is really to see how we can use a piece of land twice."

There are benefits to building underground. For instance, the stable climate allows for greater efficiency of facilities such as data centres. The enclosed environment also ensures a higher degree of safety for storing risky chemicals.

But such advantages come with a price. Mr Tan estimates that building underground will cost 50 per cent more than a similar facility above ground.

Lessons can be learnt from JTC Corporation's Jurong Rock Cavern, which is an underground oil bunker at Jurong Island. For instance, evacuation plans and ventilation points need to be mapped out in detail, as there are limited access points at such depths. There is also a smaller margin for error as space is constrained by the availability of solid rock.

Construction challenges are also more complex. When building underground, the size and the shape of the cavern are dependent on site conditions and the quality of rock, which may cause some inflexibility in the size of the facilities created within the space. For the Jurong Rock Caverns, each cavern is about 20 metres wide and 25 metres high.

In addition, engineers have to work around the problem of fault lines, and water seeping into the caverns.

Associate Professor (adjunct) Zhou Yingxin, from the School of Civil and Environmental Engineering at Nanyang Technological University, is a mining engineer who has worked on the Jurong Rock Cavern as well as the Defence Ministry's ammunition bunker.

He said: "The risks associated with underground construction is not so much that we don't know what to do with the problem, it's that very often we don't know what to expect."

"You have to build with the ground that's there, whether it's good rock or bad rock. Of course you can try to choose a good site. But even a good site, you wouldn't know the rock until you see it.

"So you must have a plan to deal with such uncertainties... That's why you must have very experienced people on site. When they see it, they know what's going to happen, and they know what to do."

While most people are used to going underground to get to carparks and shopping malls, there are various issues that architects and engineers have to consider to make underground developments truly liveable. For example, the kind of anxieties people might have with spending so many hours deep underground.

Natural light, greenery and fresh air are some of the things that make cities liveable, and will be as important in an underground space.

Andres Sevtsuki, Associate Professor of Architecture and Sustainable Design at the Singapore University of Technology and Design, said: "We're biological creatures. We like sunlight, we like environments, we like trees and nature, and we like seeing other people.

"When we build cities, when we build urban environments, I think we usually think beyond necessity, we think of ideal environments, because this is where we spend our lives."

Creating underground cities is still, in many ways, a theoretical fancy. But over the years, authorities have built increasingly taller buildings and added over a fifth of the country's land mass through reclamation alone. Going underground is simply the next frontier, in Singapore's never-ending search for space.

-CNA/ac