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Our work

Bridges and culverts

  • Box and pipe culverts
  • Minor bridges
  • Approach roads

Overview

From the foundation to the approach road

Every road crosses water somewhere. We build pipe and box culverts, minor bridges and bridge structures for government departments, with the approach roads that join them to the road on either side.

Bridge work runs in a fixed order: the foundations, then the piers and abutments, then the bearings and the deck, then the crash barriers, the wearing coat and the approaches. Each stage is checked before the next one starts.

  • WorkCulverts, minor bridges and bridge structures
  • StructuresFoundations, piers, decks and bearings
  • ApproachesApproach roads and crash barriers
  • ClientsGovernment departments and public sector undertakings
Bridge piers under construction, with machinery and workers on site

What the work covers

Four kinds of bridge work

From a pipe under a village road to a bridge on piers, with the road that leads to it.

  • Pipe culverts

    Concrete pipes laid under the road to carry small streams and drainage across it.

  • Box culverts

    Reinforced concrete boxes for larger flows, cast in place or built from precast units.

  • Minor bridges

    Short-span bridges on piers and abutments, from the foundations to the deck and bearings.

  • Approach roads

    The embankments, pavements and crash barriers that join a bridge to the road on either side.

How a bridge is built

From the deck down to the foundation

A bridge carries its load down through each of its parts to firm ground. These are the main parts, from the surface traffic runs on to the foundation.

  1. Wearing coatBituminous or concrete

    The surface on the deck, protecting it from traffic and water.

  2. Deck slabReinforced concrete

    The slab that carries the traffic between the supports.

  3. GirdersReinforced or prestressed concrete

    Beams under the deck, where the span needs them.

  4. BearingsElastomeric bearings

    Let the deck move slightly as it carries load and expands with the heat.

  5. Piers and abutmentsReinforced concrete

    Carry the deck down to the foundation; abutments also hold back the approach embankment.

  6. FoundationOpen or pile foundations

    Spreads the load into firm ground, below the depth that flowing water can scour.

Workers finishing a reinforced concrete wall

Quality

Checked at every stage

Bridges in India are usually built to the codes of the Indian Roads Congress (IRC) and the Ministry of Road Transport and Highways (MoRTH) Specifications for Road and Bridge Works. We build to the drawings and the specification in each contract.

Every material is tested against the specification, and the records are kept for the client's engineer.

  • Concrete cube testing
  • Level and thickness checks
  • Field density and moisture tests

Questions

Bridges and culverts: common questions

When is a culvert used instead of a bridge?

Culverts carry small streams and drainage under the road through pipes or concrete boxes. Where a wider opening is needed, a bridge on piers and abutments is built. The design for each contract sets which.

Do you build the approach roads too?

Yes. The approach embankments, pavements and crash barriers are usually part of the same contract, so the bridge opens with its road.

Which codes do you build to?

To the drawings and the specification in each contract: usually the IRC codes for bridges and the MoRTH specifications.

How can we send you a tender or ask for your company profile?

Send a tender through the tender enquiry form on our website, and ask for our company profile through the contact form. You can also call us on +91 99251 98001 or write to info@vishalinfraglobal.com.