Bridge construction is most complicated because of the unexpected difficulties faced during construction in challenging conditions, and especially during concreting. The latest trends and development in design and technology have lead to many challenges during the construction of bridges.
Challenges Faced in Bridge ConcretingThe quality and reliability of the concrete is crucial to safe construction and lifespan of the bridges. To ensure the same, different ingredients of concrete has to be mixed homogenously to produce a perfect mix of concrete and has to be place in short span of time. Bridge concreting is done using concrete mix up to M80 grade and critical requirements like casting blocks need maximum strength in minimum possible time for pre-stressed or post-tension casting.
Some of the other issues and challenges in concreting of bridges are stiff consistency concrete producing, placing concrete girders using cranes (e.g. Metro Projects) along heavily crowded roads & transportation and laying of concrete pipes on the sea or river for concrete placement. To overcome these concreting difficulties, Schwing Stetter India not only manufactures different types of advanced concreting equipment but also provide various concreting solutions to its customers.
Equipment UsedThe most commonly used Schwing Stetter Equipment to place concrete for bridge projects are: Batching Plants CP30 and M1, which provide a homogenous mix of concrete. Concrete Pumps like BP350, SP1800 and BP3500, which are designed with two valve technologies, Flat Gate Valve (FGV) and Rock Valve, which enable smooth conveying of concrete to long distances and also helps to pump stiff mixes for casting.
Transit Mixer 6m3, 7m3, 8m3, 9 m3, 10 m3 is usually used to transport concrete for bridge constructions. These Transit Mixers come with modern design, simple handling and are cost effective. Separate Placing Boom- 28 meter to 35 meter and Boom Placer- 17 meter to 43 meter are used for faster completion of concrete placement. These equipment take on the challenges posed by the bridge projects.
Some of the concreting solutions given by Schwing Stetter are;
- Selection of equipment for batching, transporting, placing as per the project requirements.
- Use of RVM's for concrete transfer available for on shore and off shore applications.
- Mounting option for Batching Plant, Transit Mixer, and Separate Placing Boom on barge and on lattice frame.
- Use of minimum space required for setting up Schwing boom placer, which is useful in traffic as well as casting yards.
- Pipeline placing and cleaning systems for cast yard, offshore, and high structure applications.
Bridge Project by SSISchwing Stetter India has contributed in many critical & landmark bridge projects in India. The different types of bridge projects where Schwing Stetter equipment were used are Beam or Girder type Bridges (regular), Cable Stayed Bridge like Bandra Worli Sea Link, Suspension Bridges like Bridge over Ganges in Kolkata, Elevated Highway Bridge like Pune Kothrud Bypass, Bangalore Elevated Highway Bridge and Rail bridge for metro & monorail projects in Chennai, Delhi, Bangalore, Kochi and Wadala and Vallarapadam Railway Bridges in Kochi.
Schwing Stetter India has also done bridge projects like Hebbal Flyover at Bangalore, Kosi River Bridge at Assam, White House Bridge at Navi Mumbai, Delhi Gate bridge and Sayan Bridge at Surat, to name a few.