Value Engineering in Arch Bridge Construction

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue VII, July 2018 | ISSN 2321–2705

Value Engineering in Arch Bridge Construction

Nadeel Alam¹, Khushal Chaudhari², Lalit Khadayte³, Dr. D. K. Shinde⁴

^1,2,3PG Students, ⁴Associate Professor,
Production Department, Veermata Jijabai Technological Institute, Mumbai, Maharashtra, India

Abstract– The arches are one of the oldest standing bridge structures. These bridges that were made of stone and brick masonry remain operational after hundreds of years. Arch Bridges made of Brickand Stone masonry have stood the test of time for centuries and they are still operational. Arch Bridges carry only compression forces. In the modern era with growing environmental concern and accumulation of waste and pollutant it becomes necessary to adopt sustainable construction techniques. Arch bridges require high initial cost, precision and due to time consuming construction process, very few arch bridges have been built since the early 1900s. Hence the development of flexi Arch bridge. The Flexi Arches can be installed rapidly, in less than a day rather than months, they prove to be economical than other precast bridges, for length of bridges greater more than 30 meters the economy is more as the high initial cost in machinery is taken care. These Arches have all the characteristics of masonry arches.

Keywords–ARCH bridge; bridge; construction

I. INTRODUCTION

It is no longer sustainable to construct the masonry arch bridges by conventional methods due to the high cost of the skilled workmanship required to build the accurate centring and to give precise shape to the masonry blocks [1]. The Progress on such type of work is usually weather dependent and slow. During the 1950s and 1960s the prestressed concrete/steel beam and slab systems rose to prominence [2]. Their design lives were 120 years but many of these beams and slab bridges have deteriorated after only 20-30 years. ‘fle arch’ system is a precast type of arch bridge construction, it is constructed and transported on trailers in the form of a flat pack by using a wire rope to carry its self-weight during the short lifting phase, but it behaves as a masonry arch once in place. The concrete blocks are pre-cast individually, laid horizontally with a layer connecting material on top [3]. An insitu layer of concrete, 50mm deep in the case of the 9mspan Bridge in Koregaon, Satara is placed on top and allowed to harden to interconnect the blocks (Figure 1). The arch ring can be castedun to 14 meters or as per the requirement of the design, site conditions and available lifting capacity[2]. While lifting, the gaps closes. The arch unit is then placed on a socket or seating units and the self-weight is then transferred from a single point of contact of concrete to the whole surface.

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