Infrastructure Services in Delhi NCR

The road, and what crosses under it

Infrastructure services at ERVP Infra cover the road itself and the openings in it: a new carriageway, the strengthening of an existing one, a culvert under the pavement, and a bridge where the span needs one.

Work is taken up across Delhi NCR, Gurugram, Noida, and Greater Noida.

A building stands on a plot. A road has to carry traffic, shed rain, and stay tied to the ground under it. If the pavement, the drainage, and the cross-drainage structure are designed by different people and built by another, the road fails at the joint between them. ERVP Infra keeps infrastructure planning, structural engineering, and construction execution with one team, from the first drawing through handover.

Houses, small buildings, factories, drains and sewerage, water supply, fabrication, and project supplies are separate services. This page is the road and the structure that carries it across water.

01The four kinds of work

Infrastructure construction

The road and the works that make the road usable as one job: alignment, earthwork, pavement, side drains, and the culverts or small bridges the alignment crosses.

This is the right description when the brief is a stretch of road, not a single structure. Levels, crossfall, and where the water leaves the carriageway are fixed with the pavement, because a finished road with no way for rain to get off it does not last.

Road construction

A carriageway built for the traffic it will actually take. That can be an internal road in an industrial site, an approach road, a colony or village road, or a widening and strengthening of a road already in use.

Flexible pavement is built in layers. From the ground up: a prepared subgrade, granular sub-base, wet-mix macadam, dense bituminous macadam, and bituminous concrete as the wearing course. The thickness of each layer follows the subgrade and the traffic. IRC:37 is the usual guide. A concrete road, where the slab is the riding surface, is designed as a rigid pavement, commonly to IRC:58, and is named as such in the scope. Shoulders, camber, side drains, and the tie-in to the existing road are part of the same job.

Culvert construction

A culvert takes water across the road: a pipe, a slab, or a box, under the pavement or through the embankment.

The opening is sized from the catchment and the waterway at the site. A pipe that happens to be in stock is not a design. Pipe culverts are commonly RCC pipes to IS 458, in a class that matches the fill and the wheel load over them. Where the opening is wider, or the foundation soil is soft, an RCC box is often the better structure: the walls and the slabs work together, and the road level can stay lower. Wing walls, curtain walls, and an apron belong with the culvert. Without them, the water cuts around the structure and the road settles at the ends. IRC:SP:13 is the usual guide for small bridges and culverts. Loads follow IRC:6.

Bridge construction

A bridge where the span, the waterway, or the road above it is more than a culvert can carry. Slab bridges for shorter spans, and a designed superstructure where the span, the skew, or the supports need it.

The deck, the bearings, the piers or abutments, and the foundation are one structure. The foundation follows the soil and the scour, not the detail from the last bridge upstream. Expansion joints, crash barriers or parapets, and the approach slabs are agreed in the scope so the road does not break at the bridge ends. Concrete road bridges are designed to IRC:112, with loads to IRC:6. A long-span or multi-lane bridge is designed for that site. It is not taken from a standard drawing meant for a short slab.

02How a job usually runs

01

Site and brief

Walk the alignment or the crossing. What the road is for, what traffic it takes, and whether the job is a new road, a strengthening, a culvert, or a bridge.

02

Ground and water

Levels, the existing road, and the soil the pavement or the foundation will sit on. For a culvert or a bridge, the waterway, the high-water marks, and how the flow approaches the opening. Drawings prepared together: alignment, pavement or structure, and drainage.

03

Scope and estimate

A written scope: earthwork, pavement layers, drainage, and any structure. What is in this contract, and what is left to the road authority or another contractor. Price follows that scope.

04

Earthwork and foundation

Formation, compaction of the subgrade, and, where there is a structure, excavation and the foundation before the monsoon closes the working season. A culvert apron and curtain wall are finished before flood water arrives, not after.

05

Pavement or structure

Road layers in order, each compacted before the next is laid. Or the culvert or bridge: reinforcement, concrete, bearings, and the deck, as per the drawings.

06

Tie-in and handover

Side drains, shoulders, approaches, and the joint with the existing road. A drive over the finished surface, and a list of anything still open.

A culvert or bridge on an existing road adds traffic management before step 4. A road on a clear alignment usually does not.

03What has to be settled before work starts

Soil and subgrade: The pavement thickness and the foundation both depend on the ground. CBR for the road. Bearing capacity, and scour where there is flowing water, for a culvert or a bridge. The next road along the same corridor is not a substitute for a test on this one.
Pavement: Flexible crust to IRC:37: subgrade, GSB, WMM, DBM, and BC, in the thicknesses the traffic and the subgrade require. A rigid pavement, if that is what the brief asks for, to IRC:58. Bitumen grade, layer thickness, and compaction are named in the scope so the site is not changing them on the day of laying.
Cross drainage: Pipe, slab, or box, sized for the waterway. Pipe class where a pipe is used. Wing walls, curtain wall, and apron included, not left as a later extra. Small bridges and culverts follow IRC:SP:13. Loads follow IRC:6. Concrete bridges follow IRC:112.
Levels: Formation level, road level, and the invert of the culvert or the soffit of the bridge. These are fixed before earthwork, so the road does not dam the nallah and the deck does not sit in the flood.
What "finished" means: Formation only, pavement up to WMM, a black-topped road, or a road with drains and structures complete. The estimate matches one of those, and says which.

04Where this work is used

A new road or the widening of an existing one, including internal and approach roads
Pavement for an industrial site, a layout, or a road the owner has to build up to a public road
A pipe, slab, or box culvert where a drain or nallah crosses the alignment
A short-span bridge, with its approaches, where a culvert is not enough

Why this sits with ERVP Infra

These points follow how the firm already describes its work.

Design and engineering sit with the construction team So the pavement, the drains, and the structure are one drawing set.
Clashes between the road level and the culvert or bridge They are meant to be found before earthwork starts.
One team is accountable From the first drawing to handover.
The same office takes infrastructure work With residential and industrial work, across Delhi NCR, Gurugram, Noida, and Greater Noida.
Scope, programme, and cost Discussed against the alignment and the drawings, not against a rate per kilometre that ignores the ground and the crossings.

05Questions before you start

Do you only build roads?: Under infrastructure services the work is infrastructure construction, road construction, culvert construction, and bridge construction. Houses, factories, sewerage, and water supply are other services.
Can you build from drawings we already have?: Yes. Issued alignment, pavement, and structural drawings can be used as the construction set. If the pavement or the structure has not been designed for this ground and this waterway, that is completed before earthwork.
Who decides the thickness of the road?: The subgrade and the traffic. IRC:37 is the usual guide for a flexible pavement. A thickness taken from another project is not used unless it matches this site.
What is the difference between a culvert and a bridge?: A culvert is the short opening that takes water under the road: a pipe, a slab, or a box. A bridge is used when the span or the waterway needs more than that. IRC:SP:13 is the usual reference for the smaller structures. Both are designed for the load the road puts on them.
Do you need a soil test?: Where the pavement thickness or the foundation depends on it, yes. For a crossing, the waterway has to be looked at as well. The structure upstream is not a substitute.
Who sanctions a public road or a bridge?: Drawings are prepared so they can be submitted to the authority that owns the road or the land. Sanction is issued by that authority. A private approach or an internal road follows the owner's brief and whatever the local body requires for a connection to the public road.
Which areas do you take up?: Delhi NCR, Gurugram, Noida, and Greater Noida.
How do I start?: Share the location, whether it is a road, a culvert, or a bridge, and any drawings or levels you already have. The next step is a look at the site and a scope, not a rate guessed from a phone call.

Get in Touch

Talk through the road before the estimate.

Send the location, the length or the crossing, and any drawings you have. ERVP Infra will tell you what the scope needs to include.

Contact ERVP Infra

Infrastructure services in Delhi NCR