Signature Tower was a proposed skyscraper in Jakarta, Indonesia. The proposed height is . The tower was proposed in 2010, with developers hoping to begin construction in 2015. Planning permission for the tower was granted in late 2015. Construction was scheduled to begin in the third quarter of 2016, assuming a loan of approximately $1.5 billion could be secured.

China State Construction Engineering The China State Construction Engineering Corporation (CSCEC) () is the largest construction company in the world by revenue and the 8th largest general contractor in terms of overseas sales, as of 2020. While most of the assets of CSCEC were flo ...

has been appointed to construct the tower. The planned skyscraper is a part of a redevelopment project of (Sudirman Central Business District)

SCBD Sudirman Central Business District or SCBD is a business district with an integrated mixed use development concept, located in South Jakarta, Indonesia, consisting of condominiums, office buildings, hotels, shopping and entertainment centers. The t ...

, near the

Semanggi Interchange Semanggi Interchange ( id, Simpang Susun Semanggi) or commonly known as Semanggi Bridge () is a major road interchange in Jakarta, Indonesia which consists of a cloverleaf interchange (hence , "clover")—the first, and until the 1990s the only ...

and located south of Gelora Bung Karno Stadium. It is within the

Golden Triangle of Jakarta The Golden Triangle of Jakarta ( id, Segitiga Emas Jakarta) or can also be referred to as Medan Merdeka–Thamrin–Sudirman Axis () or Sudirman–Thamrin–Kuningan Axis (is), is a roughly triangular area in the center of Jakarta, Indonesia, ex ...

, where the majority of the city's major development areas are located. When completed, the structure will include six basement floors used for parking space, while the podium will feature retail, convention and entertainment venues, with the rest of the skyscraper used as office and residential space.

Engineering and design

Due to the presence of unstable

alluvial deposits Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluv ...

within the Jakarta Basin and the seismic prone area from where the skyscraper will be built, the design must comply with seismic criteria using a probabilistic seismic hazard analysis (PSHA) defined by the Pacific Earthquake Engineering Research Center (PEER), Tall Buildings Provisions and the

American Society of Civil Engineers American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...

(ASCE). In addition,

wind tunnel Wind tunnels are large tubes with air blowing through them which are used to replicate the interaction between air and an object flying through the air or moving along the ground. Researchers use wind tunnels to learn more about how an aircraft ...

tests must be conducted under city regulations due to the height of the building exceeding 50 stories and . Aerodynamic testing was performed by applying a scaled wind velocity on a 1:500 scale model of the skyscraper equivalent to applying an average hourly wind velocity of on the actual design. On 13 July 2017, acting governor of Jakarta Djarot Syaiful Hidayat attended a regional meeting with the developers, discussing about the UDGL (Urban Design Guide Line) and finally reached an agreement to integrate the tower with the ongoing developments of the Jakarta MRT. Djarot later sent a letter to Indonesian President Joko Widodo, requesting him to make the tower to become a national icon.

Foundation

To accommodate the basement floor levels, had to be excavated and dewatered prior to construction. Drilled shaft bore piles measuring in diameter and in length with a spacing of were suspended within a to thick mat foundation system designed to resist wind and seismic loads. This technique also redistributes axial loads on top of the harder and denser sediment underlying the alluvium. Surrounding the basement wall is a thick

slurry wall A slurry wall is a civil engineering technique used to build reinforced concrete walls in areas of soft earth close to open water, or with a high groundwater table. This technique is typically used to build diaphragm (water-blocking) walls surro ...

designed to withstand and retain both

groundwater Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidated ...

and soil pressures.

Structure

To withstand lateral loads, a "core-outrigger-mega-frame" system consisting of two major components will be used. The primary system will feature a composite

concrete Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wid ...

core connected to eight surrounding super columns all suspended within a network of steel outrigger trusses that spans two stories. A mega frame consisting of a network of nine belt trusses interlocking the super columns together will make up the secondary system that surrounds the primary structure. The super columns will eventually thin and slope towards the apex to match the profile of the architectural tip. The square concrete core that houses the elevator shafts and stairwells will thin to near the top from a ground thickness of to accommodate additional space. The floors residing between the primary and secondary systems will feature a hybrid design consisting of concrete slabs on top of a metal deck to reduce construction time and reduce additional loads.

Indefinite postponement

In June 2018, PT Danayasa Arthatama, the company that owns and develops SCBD, announced the development of Signature Tower Jakarta had been indefinitely postponed. Tony Soesanto, the director of project development company Grahamas Adisentosa, said the company decided to postpone construction because the market for office space was not promising. He also said there was a financing problem and the company had tried to conduct a road show to attract investors or loans.

References

{{Supertall skyscrapers Proposed buildings and structures in Indonesia

Engineering and design

Foundation

Structure

Indefinite postponement

See also

References