CT Civil Limited

Trenchless Pipe Installation and Pipe Ramming

The expertly knowledgeable team at CT Civil Limited offer No-Dig Trenchless Pipe Installation services. With over 50 years’ combined experience in tunnelling and trenchless methods, we are the number one choice for underground works in New Zealand.

Whether you require tunnel boring, pipe jacking, pipe crossing, or drill blast services, CT Civil Limited are your go-to company for any No-Dig Trenchless technology project.

We are able to operate anywhere in New Zealand, and can manage most ground conditions with our adaptable plant machinery. All our machines and services meet or exceed the new mines regulations; health and safety are paramount to us on all our projects. CT Civil Limited is a member of the Australian Society for Trenchless Technology (ASTT) so you can rest assured of the safety and quality of all our work.

No matter the size and scale of your no dig project, CT Civil Limited can work with you to provide the best trenchless technology methods for your needs, giving you a comprehensive service.

Stormwater and Sewer Vertical / Horizontal Rehabilitation

Vertical Rehabilitation

CT Civil refurbish any infrastructure assets that have been subject to degradation, such as pump stations, treatment plants, storage chambers and bunded areas, including damage caused by acid or gas attack. We are specialists in working within confined spaces.

Our process generally is to prepare surfaces by cleaning them with high pressure water, rebuild them to their original profiles and then coat the surfaces with product that provides long term protection.

Horizontal Rehabilitation

No matter whether they are made of corrugated metal, brick, or concrete, eventually pipes, tanks manholes, wells, and other structures age and need repair or rehabilitation. That’s where CT Civil can help. Our line of products enables you to select the correct product for the application. Whether it be structural rehabilitation or providing a protective coating, we are able to provide a solution to aging and damaged infrastructure assets.

Leak Repair

We use Prime Resins polyurethane products to stop leaks without digging. They are optimally formulated to stop leaks and extend the life of the structure by sealing out water, eliminating damaging effects to concrete walls, and reducing groundwater infiltration. The resins remain flexible enough to accommodate thermal expansion and contraction and minor movement of the structure. These resins are more cost efficient than replacement, effective in both tight cracks and wide joints, react with moisture to form a watertight seal and last for decades in most cases.

Void Filling – FoamCrete – Grouting

To prevent settlement and underground collapse, we use resins or foamcrete (lightweight aerated grout) to fill large voids which can range from small such as the annulus around the outside of a tunnelled pipe, to large voids such as abandoned stormwater and sewer lines, storage chambers and excavated trenches.

Foamcrete has a very low viscosity, good thermal properties and a fire rating making it suitable for a variety of uses.

Ground Stabilization

We inject chemical grouts to stabilise soil and create subgrade grout barriers below roads, in earth dams, coastal seawalls, underground structures and tunnelling operations.

A major advantage of chemical grouting is the ability to strengthen existing soils without the need for excavation or disruption of facility operations. As the popularity of trenchless technology continues to grow, engineers and contractors are finding that they can use chemical grouts to solve a multitude of problems caused by poor soil or excessive water conditions.

Dewatering and Desludging

Our patented dewatering system combines
the benefits and performance of a Vacuum Belt Filter, Rotary Vacuum Filter, Gravity Belt Thickener and Belt Press into one standalone system.

Modular in design and can be used in a wide range of site conditions on both high and low solids feedstock. Applications include tunnelling spoils/slurries, waste water, pulp & paper, mining and waste settling ponds from process facilities.

Dewatering and Desludging PDF

Specialist Equipment Hire

We have a range of equipment for hire.

Please contact us for further information.

Impac Prequal Certificate - 05.11.2019 to 05.11.2021-pdf
JAS-ANZ transparent
CCNZ - Construction Excellence Award - 2019 Magazine-pdf
Construction Excellence Awards 2019 Article-pdf
CCNZ - Construction Excellence Award - 2019-pdf
CTNZ - SHE Prequalification Certificate - 2021-2023-pdf
NZTA_Concrete Treatments NZ Limited Prequalification Cert. Exp 30.06.2023. -pdf