Thanh Trì Bridge
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The Thanh Trì Bridge () (completed 2008) is a bridge across the Red River in
Hanoi Hanoi ( ; ; ) is the Capital city, capital and List of cities in Vietnam, second-most populous city of Vietnam. The name "Hanoi" translates to "inside the river" (Hanoi is bordered by the Red River (Asia), Red and Black River (Asia), Black Riv ...
, Vietnam. It was one of the
Millennial Anniversary of Hanoi The Millennial Anniversary of Hanoi () was celebrated from 1 to 10 October 2010, the 1,000th anniversary of the foundation of the capital Thăng Long by the emperor Lý Thái Tổ. Many events were held in 2009 and 2010 to commemorate the an ...
commemorative projects along with the Vĩnh Tuy Bridge. At 3,084m it is one of the longest bridges in Asia. It is part of the North-South expressway, and is the largest
prestressed concrete Prestressed concrete is a form of concrete used in construction. It is substantially prestressed (Compression (physics), compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. Post-t ...
bridge in Vietnam.Vietnam pictorial - No 595 - Page 9 Thông tấn xã Việt Nam, Vietnam. Bộ văn hóa và thông tin - 2008 "Previously, Thanh Tri Bridge, the largest prestressed concrete bridge in Vietnam had started operation. ... The use of Thanh Tri Bridge is important to the socio-economic development in Hanoi, the northern area and the whole country as well."


History and Construction

Construction of the Thanh Trì Bridge was part of Vietnam's broader strategy in the early 2000s to expand and modernize transportation infrastructure in the Hanoi metropolitan area. It was specifically designed to support Ringway 3 (Hanoi), a major expressway that encircles the capital and serves as a bypass for long-haul traffic, reducing congestion in the inner city. The project broke ground in 2002 as one of the largest bridge projects in Vietnam at the time, both in scale and budget. It was built with
official development assistance Official development assistance (ODA) is a category used by the Development Assistance Committee (DAC) of the Organisation for Economic Co-operation and Development (OECD) to measure foreign aid. The DAC first adopted the concept in 1969. It is w ...
(ODA) from the Japanese government, coordinated through the
Japan International Cooperation Agency The Japan International Cooperation Agency (), also known as JICA'','' is a governmental agency that delivers the bulk of Official Development Assistance (ODA) for the government of Japan. It is chartered with assisting economic and social gr ...
(JICA), and constructed by a consortium led by
Obayashi Corporation is one of five major Japanese construction companies along with Shimizu Corporation, Takenaka Corporation, Kajima Corporation, and Taisei Corporation. It is listed on the Tokyo Stock Exchange and is one of the Nikkei 225 corporations. Its h ...
and Sumitomo Mitsui Construction Co., Ltd. in cooperation with Vietnamese construction units. By 2007, the main structure was completed, and the bridge was fully opened to traffic in 2008, marking a major milestone in Hanoi’s transportation development. The bridge became the longest prestressed concrete bridge in Vietnam, and one of the widest in Southeast Asia upon its completion. Thanh Trì Bridge also played a symbolic role as one of eight key infrastructure projects commemorating Hanoi’s 1,000th anniversary in 2010. Since its opening, it has significantly alleviated traffic pressure from older bridges such as
Chương Dương Bridge The Chương Dương Bridge (, completed 1985) is a major river road bridge in Hanoi, Vietnam. It is 1,213 meters long and has 2 lane In road transport, a lane is part of a roadway that is designated to be used by a single line of vehicle ...
and
Long Biên Bridge Long Biên Bridge () is a historic cantilever bridge across the Red River that connects two districts, Hoàn Kiếm and Long Biên of the city of Hanoi, Vietnam. It was originally called ''Paul Doumer Bridge''. History During French regim ...
, and has helped improve connectivity between the eastern and southern regions of Hanoi.


Design and Engineering

The Thanh Trì Bridge is designed as a
prestressed concrete Prestressed concrete is a form of concrete used in construction. It is substantially prestressed (Compression (physics), compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. Post-t ...
box-girder bridge, spanning the Red River as part of Hanoi’s Ring Road No. 3 and the
North–South Expressway (Vietnam) North–South Expressway may refer to: *North–South Expressway (Malaysia) **North–South Expressway Northern Route **North–South Expressway Central Link **North–South Expressway Southern Route *North–South Corridor, Singapore, formerly nam ...
. At the time of its completion, it was recognized as the longest prestressed concrete bridge in
Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
and among the widest in
Southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...
. The main bridge structure measures approximately 3,084 meters in length and is composed of 33 spans of 93.5-meter box girders constructed using segmental cantilever methods. The deck width is 33.1 meters, accommodating six traffic lanes, with shoulders and pedestrian paths on both sides. Each span was built using high-strength, post-tensioned concrete, providing enhanced durability and load-bearing capacity. The bridge was engineered to withstand flood-level variations of the Red River, and its piers were founded on large-diameter bored piles driven deep into the alluvial riverbed, ensuring structural stability against lateral flow and seismic effects. To meet stringent construction and quality control standards, advanced technologies such as slip-form construction, automated prestressing, and segment launching gantries were used. The entire superstructure was designed for a 100-year lifespan, with key materials imported from Japan under Japanese Industrial Standards (JIS). The project was managed by the Thăng Long Project Management Unit under the Vietnamese Ministry of Transport, with the Obayashi–Sumitomo Mitsui joint venture serving as the main contractor. Technical consulting and supervision were provided by Pacific Consultants International (Japan), ensuring adherence to international bridge construction standards.


References

{{DEFAULTSORT:Thanh Tri Bridge Bridges in Hanoi Hong River Millennial Anniversary of Hanoi Bridges completed in 2010 2010 establishments in Vietnam 21st century in Hanoi