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Hanoi approves underground construction space planning

The Hanoi People’s Committee has just approved the planning of underground urban construction spaces in 20 districts with a total area of ​​756 km2, maximum depth of 30 m.

20 districts planned basement by 2030, vision to 2050, including: Hoan Kiem, Ba Dinh, Dong Da, Hai Ba Trung, Cau Giay, Tay Ho, Thanh Xuan, Hoang Mai, Ha Dong, Nam Tu Liem, Bac Tu Liem , Me Linh, Dong Anh, Gia Lam, Dan Phuong, Hoai Duc, Thanh Oai, Thanh Tri and Thuong Tin.

Hanoi identified underground construction items into two groups: traffic systems, technical infrastructure, and electricity; and underground public works such as commercial centers, services, supermarkets, entertainment, warehouses, parking lots…





Map of the location of the sub-district zoning planning in the city.  Image: Ta Lu - Vo Hai

Location map urban district zoning planning in. graphic: Ta Lu – Vo Hai

Potential areas for underground construction including downtown expanded history and inner city; tall building north of the Red River; the urban chain in the East Ring 4, the green belt project and the West Lake spatial axis – Ba Vi, West Lake West Lake, Co Loa and along the urban rail corridor.

In terms of depth, The plan is divided into 3 layers with separate functions. The shallow layer (0-5 m) serves the construction of underground technical infrastructure such as basement entrances, pedestrian tunnels. Middle class (5-15 m) for building public works, underground parking. The deep layer (15-30 m) is used to construct underground transportation systems, urban railways…

A restricted area for underground construction is Hanoi’s Old Quarter; outside the Red and Duong river embankments; where there is a risk of affecting the safety of the embankment and flood drainage capacity.

Areas that are prohibited from building and exploiting underground spaces are areas classified as special national heritage, such as the Imperial Citadel of Thang Long, the legacy of President Ho Chi Minh at the Presidential Palace; Quoc Tu Giam Temple; Co Loa area; Hai Ba Trung temple; Hoan Kiem lake area and Ngoc Son temple; the scope of the defense and security land area zoning.

For underground traffic, Hanoi will focus on developing the road system at different intersections; urban railway network with 8 lines, a total underground length of about 86.5 km and 81 underground stations. The development orientation follows the TOD model, namely densely packed cities around urban train stations; prioritize the development of basements in public and commercial works centers.

In addition, the city also aims to equip an underground parking system, apply technology to optimize the area used within the city, and equip parking spaces under flower gardens, parks and squares. The technical infrastructure including pipelines, culverts, power lines and telecommunications is also 100% underground…





Construction site subway station S12 urban railway line Nhon - Hanoi station.  Photo: Pham Chieu

Construction site subway station S12 urban railway line Nhon – Hanoi station. Photo: Pham Chieu

With underground public parkingIn the historic city center, Hanoi will utilize existing parking lots to build multi-storey underground parking lots, pushing mechanized parking floors to save land. The city allows the addition of underground parking spaces under flower gardens, parks, squares and public works; planning of underground public parking spaces in four districts of the old city with 78 construction sites (total floor area of ​​about 104 ha, 3-4 basement works, maximum 5 floors, allows to be combined with other functions. Trade in Services).

Technical infrastructure The underground system remains intact sewer network, the shared system basically meets the requirements in the historic city center. A technical trench will be built on the new road to service the 100% underground line, pipeline…

In the satellite city Soc Son, Son Tay, Hoa Lac, Xuan Mai, Phu Xuyen, cities encourage the development of underground public spaces around the railway line which are expected to connect with the city center. As for the satellite city of Hoa Lac and the area where universities and research facilities are planned to be built, Hanoi encourages the construction of underground infrastructure in high-tech laboratories, warehouses – storage facilities and other areas. Modern experimental production.

According to the Hanoi People’s Committee, the general planning of the Hanoi underground construction space is to meet the requirements of state management on the construction and use of joint and synchronized underground works and underground construction spaces in the area. It is the basis for building a database of urban underground construction space, making detailed planning of underground construction space for urban areas, making underground construction investment projects in downtown, downtown areas, towards civilized capital development, modern, sustainable urban development.

This general planning decision is effective from 15 March.

Son Ha

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