India has a large inventory of bridges including over 1,20,000 bridges under Railways belt, with over 51,000 bridges as much as 100 years old which have outlived their lifespan. There have been periodic reports of some of the bridges under Railways and other agencies collapsing under their weight in normal circumstances and during rainy seasons. History of state of affairs of bridges in the country is abound with interesting stories all pointing out to a skewed approach to the inspection, repairs and maintenance of these bridges which are lifeline of the communication network of the country. In this special issue on Bridges and Roads, we present some of the typical examples to address the critical area of repair and rehabilitation of old and some of the new bridges so that they do not pose a serious danger to the public.
Dr. J. M. Chandra Kishen, Professor, Dept. of Civil Engineering, Indian Institute of Science, Bengaluru, presents a case study on the Replacement of Cables in Externally Prestressed, Dry Jointed Super
In India, the 1600-year-old iron pillar at Mehrauli, New Delhi, is one of the world’s foremost metallurgical curiosities. Since then, steel has been used in different parts of the world for various pu
Project Management involves Planning, Monitoring, and Control. Without proper planning, there cannot be monitoring, and without control, there is no use of monitoring. So, ‘Project Control’ becomes th
The two most popular types of Cable Supported Bridges are Extradosed Bridges and Cable Stayed Bridges. These have been compared with Girder Bridges constructed by cantilever construction (Fig 1). The
The Pamban Strait, which separates the Indian mainland from Rameswaram Island in Tamil Nadu, is now home to an engineering marvel: India’s first vertical-lift railway sea bridge.
The Kolar and Chikkaballapur districts in eastern Karnataka face recurring water scarcity exacerbated by depleted groundwater and contamination from salts like Fluoride and Nitrate. To address this, K
The process in which the response of soil influences the motion of the structure and motion of the structure influences the response of soil is termed as SSI. Soil structure interaction (SSI) consists
Construction of Extra -Dosed major Bridge across Sharavathi back waters and approaches between Ambargodu and Kalasavalli of NH-369E in the state of Karnataka. The Proposed bridges was located at the u
Professor (Dr.) S B Hegde explores innovative materials and technologies, including recycled aggregates, high-performance concrete, geosynthetics, bio-based composites, fiber-reinforced polymers (FRP)
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In September 2017, the Honorable Prime Minister of India launched the nation's most ambitious project, the Bullet Train, marking a significant stride toward a New India. The National High Speed Rail C
Dr S B Hegde reviews recent advancements in sustainable materials, their properties, applications, benefits, and prospects in India’s bridge construction industry.
The precast segmental construction is the most sought after methodology with its speed as high as 2½ days per span of superstructure construction. Er. Vinay Gupta, Managing Director, Tandon Consultant
Bihar is witnessing an alarming series of bridges collapsing, highlighting the vulnerability of both new and existing infrastructure in the state, and raising concerns about public safety and the over
The recent bridge collapses in Bihar have ignited widespread concern over the safety and reliability of our critical infrastructure. As a specialist in Geotechnical Engineering, I firmly believe that
The recent bridge collapses in Bihar have cast a spotlight on the pressing issue of infrastructure safety. These tragic events underscore the need for a thorough examination of the reasons behind such
Alexander Jones, Research Analyst, delves into the impact of Baltimore Bridge collapse on the agricultural and construction machinery supply chain in the United States. The tragic incident in which a