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Pipe ramming for tough ground conditions across New Zealand

Pipe ramming is a fast, effective method for installing steel or concrete pipes through the ground using percussive force. It’s ideal for short crossings under roads, rail, or embankments where other methods aren’t practical.

This is the kind of work where things can get tough — and where we’re right at home. At United Tunneling, we use pipe ramming to get through difficult ground conditions quickly and reliably, delivering solid results on jobs others would rather avoid.


How pipe ramming works

Pipe ramming is a trenchless installation method that uses percussive force to drive steel or concrete pipes through the ground. The pipe is driven forward in short, powerful impacts from a launch pit, making it effective for short crossings in tough or compact ground conditions.

It is a simple, robust method often used where other trenchless techniques are not practical.

Short road crossings

Ideal for installing pipes under roads with minimal surface disruption.

Rail and embankment crossings

Used for crossing rail corridors and compacted ground where access is limited.

Tough ground conditions

Effective in soils where other trenchless methods may not be suitable.

Quick installation works

Suitable for short-duration projects where efficiency is key.

Steel and concrete pipe installation

Commonly used for robust pipe materials requiring strong installation force.

Restricted access sites

Works well in tight environments where traditional excavation isn’t possible.

Benefits of pipe ramming

Fast installation for short crossings.

Minimal ground disruption during installation.

Works in tough ground condition.

Ideal for roads, rail, and embankment.

Suitable for steel and concrete pipes.

Tough jobs, done well.

Kennedy Road SW crossing – Tauranga City

United Tunneling was engaged to deliver a specialist underground installation at Kennedy Road SW in Tauranga City, working beneath a busy collector route where maintaining surface access was

Ngaruawahia rail crossing – NIMT Twin Line

United Tunneling was engaged to deliver a trenchless installation beneath the North Island Main Trunk (NIMT) twin rail line at Ngaruawahia. The works required a controlled crossing beneath an active

Putaruru trenchless works – Kinleith Rail & SH1 corridor

United Tunneling delivered a series of trenchless installations across Putaruru, covering rail, highway, and local road crossings. The works required a mix of microtunneling and auger boring methods

Taranaki Sewer upgrade – State Highway 3 crossing

United Tunneling was engaged to complete a trenchless sewer installation in Taranaki, delivering works beneath State Highway 3 and tying into an existing stormwater box culvert. The project involved

Frost Road GAJV crossing – South Western Motorway

United Tunneling was engaged to complete a specialist microtunneling installation for the Frost Road GAJV project, delivering an underground crossing beneath the South Western Motorway. The works

Cobham Drive crossing – State Highway 1

United Tunneling was engaged to deliver a specialist trenchless crossing beneath State Highway 1 at Cobham Drive. The project involved installing 80 metres of 1500mm concrete jacking pipe at depths

City Rail underground crossing – Auckland

United Tunneling was engaged to deliver a specialist microtunneling installation as part of works connected to the City Rail project in Auckland. The job involved installing 300 metres of 560 SDR9 PE

Pipe ramming – what you need to know

What is pipe ramming used for?

Pipe ramming is used to install steel or concrete pipes underground, typically for short crossings under roads, rail, or embankments.

When is pipe ramming the right choice?

It’s a good option for short, straight runs where ground conditions are tough or other trenchless methods aren’t practical.

Can pipe ramming be used under roads or rail?

Yes, it’s commonly used for crossings beneath roads and rail lines without needing to dig up the surface.

What ground conditions does it work in?

Pipe ramming works well in compact or difficult ground where other methods may struggle.

How accurate is pipe ramming?

It’s less precise than methods like microtunneling, but it’s reliable for shorter runs where exact alignment isn’t as critical.

Got a tricky underground job coming up? 

We’re here to answer your questions and get things drilling.