Vietnam’s Biggest Concrete Bridge
The 12.8 km, Thanh Tri, Vietnam ’s largest prestressed concrete bridge, was recently opened to traffic. The bridge running through Hanoi Capital with the section crossing the river being nearly 3.1 km in length will help ease traffic congestion in the city, and facilitate socio-economic development of the city and some other northern localities.

The bridge is over 33.1 m in width with six lanes, including four designed for vehicles to run at a speed of 100 km per hour. The bridge project is funded by Japan’s official development assistance and Vietnam’s reciprocal capital. Construction of the Thanh Tri Bridge look four years and was carried out by a joint venture formed by Japanese firms Obayashi Corporation and Sumitomo-Mitsui Construction Corporation, under the supervision of Pacific Consultants International. The project is managed by the Project Management Unit Thang Long under the Ministry of Transport, Vietnam.

For the first time, modern bridge construction techniques such as the special cofferdam and Movable Scaffolding System (MSS) have been introduced to Vietnam benefitting Vietnamese engineers and workers. Other technologies that were used in this project included horizontal Hacking, remedial works for defected piles that included jet grout column and injection grout.

Horizontal Jacking

Vietnam’s Biggest Concrete Bridge
Horizontal jacking was applied for the Main Bridge of Thanh Tri Bridge. The Main Bridges is a 7- span continuous ridgedframe Prestressed Concrete Box Girder that is 680m. The Main Bridge was constructed using balanced cantilever method. In order to minimize the tensile force of the Prestressed Concrete Box Girder and bending moment of piers due to creep, shrinkage and temperature change which occur after closure of the bridge, horizontal jacking with forces of 6,000 kN 15,000 kN were applied at the four closure sections.

Remedial Works for Defected Piles

The foundation of the Thanh Tri Bridge was done using cast–in– place reinforced concrete piles with diameters of 1.0 m, 1.5m and 2.0 m. When the piles with diameters of 1.0 and 1.5m were drilled using the Earth Drill Method, concrete defects occurred at the bottom of many of the piles due to sedimentation or corruption of drilled walls. The following grouts were applied to correct the defected piles.

(a) Column Jet Grout

Column Jet Grout is a special grouting method used to construct soil cement columns using spouted cement milk, water and air with high pressure. Three Columns Jet Grout were constructed around the defected pile with lengths of 3.0 m to 5.0 m. This method was applied to correct more than 100 defected piles.

(b) Injection Grout

Injection Grout is a low-pressure grout applied at the bottom of the defected piles. This grout was injected through the pipes for Ultra Sonic Logging Test. This method was applied to correct about 30 defected piles for this project.
Er. Vivek Abhyankar describes the steps and aspects of load testing of various types of superstructures, along with some cautionary measures and points to ponder upon by the designers, site engineers, and testing agencies. The information provided will be

Read more ...

Girders with corrugated steel webs represent a new innovative system which has emerged in the past decade. These girders have thinner webs, higher fatigue resistance, and are more economical, easier to fabricate, more aesthetic, and provide faster construction

Read more ...

The iconic National Namaste Signature Bridge in Delhi over the river Yamuna appears languid in perpetual motion in the tradition of the Calatrava’s Bridges in motion, symbolizing nationalism in its visual form. V N Heggade, FNAE, Structural Consultant, Mumbai

Read more ...

The former Prime Minister of India Shri H D Devagowda laid the foundation stone of the Bogibeel Bridge on January 22, 1997 at Kulajan (Assam). After 5 years of laying of the foundation, on April 22, 2002 the Prime Minister of India Shri Atal Behari Vajpayee

Read more ...

As part of Northeast Policy, the Ministry of Railways took up the project of providing rail connectivity to Imphal in Manipur state. As per the detailed survey, the rail alignment takes off from existing Jiribam

Read more ...

Brahmaputra is one of the longest river in Asia with a total length of 2880 km & out of which 920km (approx.) lie in India. The New Brahmaputra Bridge @ Tezpur is one of the most challenging one, in the attempt to bridge

Read more ...

The road and railway crossing across the Brahmaputra on National Highway-52B is located at Bogibeel, about 17km downstream of Dibrugarh in Assam. The location is an area of high intensity rainfall (the annual rainfall ranges

Read more ...

The world has progressed beyond imaginations. Similar to the field of IT, Civil Engineering has also taken several steps forward to bring out innovative technologies to meet challenges of this world’s aspirations. Going forward from

Read more ...

The bridge lies in the state of Assam, but this location is usually referred to as upper Assam as it is far away from Guwahati and bordering China. The nearest airport is Dibrugarh. Then there is a drive of 65km into the

Read more ...

The Infrastructure Industry is continuously evolving; new roads, elevated corridors, expressways, railways, dedicated corridors, metros, mono-rails are being constructed all the time. They also require constant

Read more ...

The 6.5 feet wide walkway in the Hongyagu Scenic Area in Hebei province hangs 755 feet above the ground, and is the world's longest bridge, which opened in 2017-end. Designed by Tel Aviv architect Haim Dotan

Read more ...

Prestressed Concrete (PSC) structures especially bridges are being largely used all over the world due to their multifarious advantages in terms of structural behaviour, economy as well as aesthetical

Read more ...

Four Span Pipe Bridge
Distressed structures require necessary remedial measures in order to restore their original structural properties like strength and stiffness. Validating the effectiveness of the proposed qualitative remedial

Read more ...

Foot Bridges
Footbridges have a longer history than road or railway bridges. Ancient footbridges comprised of natural materials such as roots of trees, ropes, stones, masonry, and wood. Modern footbridges are built

Read more ...

Thane Creek Bridge
Load testing is done to determine the safe load carrying capacity of structures, determining if specific legal or overweight vehicles can safely cross the structure or needs to be restricted and the level of post

Read more ...

Bridge in Central Kerala
Cement concrete is a versatile building material and is the second most consumed material in the world, after water. It is made using porland cement, coarse, and fine aggregates, water and one or more

Read more ...

Concrete Road Bridges
Planning, design and construction of bridges and flyovers is very challenging at places with space constraints. There has been rapid development with the availability of high strength steel and concrete

Read more ...

Integral Abutment Bridges
The conventional bridges use expansion joints and bearings to accommodate the thermal movements of the bridge. However, they don't completely eliminate the distress caused because

Read more ...

Bridge Restoration
The use and advantages of Post Tensioning are very well known in the Civil Engg Industry as it has been in use for the last 40 to 50 years. Post tensioning is one of the best methods to induce stresses in the concrete

Read more ...

Signature Bridge
Wazirabad Bridge or Signature Bridge Project is an initiative of Delhi Government, planned during the Commonwealth Games. It was conceptualized to be a landmark tourist icon that would also speed

Read more ...

×
Sign-up for Free Subscription
'India Construction Week'
Weekly e-Newsletter on Construction Industry
Get the latest news, product launches, projects announced / awarded, government policies, investments, and expert views.
Click here to subscribe.