Terratest Qatar LLC

In 2018, Terratest Qatar LLC performed the micro-tunnelling works for the project EPIC of Hamad International Airport Jet A1 Supply Pipeline.

The work consists of roundabout road crossing, accessing to the airport, including the excavation & construction of the shafts and dewatering.

The Micro-tunnelling works consist of one single long drive performed by AVN 1200 to cover project pipeline diameter.

Ø 1,200 mm ID reinforced concrete sleeve pipes were jacked and then 24” ID pipe sleeve pipes were installed inside by attaching some rolling spider collars and pulling them inside and throughout the already drilled RC pipeline.

Works were successfully performed all in accordance with the high standards required being the longest drive executed in Qatar by a AVN 1200.

Ground consisted of Simsima Limestone strata at the ground layers.

In 2019, Terratest Qatar LLC performed the micro-tunnelling works for the project Barzan Offshore Platforms Pipelines,to develop natural gas, reserves within the North Field located offshore Qatar.

The Project comprises a natural gas offshore production system with conventional wellhead platforms, interfiled pipelines, and export pipelines to the Barzan Onshore Gas Plant located at Ras Laffan Industrial City (RLIC), Qatar.

Micro-tunnelling works consist of three crossings of two parallel drives each, AVN 1200+Extension kit equipment was deployed to cover project pipeline diameter.

Ø 1,500 mm ID reinforced concrete sleeve pipes were jacked and then 32” sleeve pipes were installed inside by attaching some rolling spider collar and pulling them inside and throughout the already drilled RC pipeline.

Procedure is considered successful once the pipe is already installed and confirmed by pressure test that the line sealed asper technical specifications.

Ground mainly consisted of weak to medium Simsima Limestone layers.

In 2018-2019, Terratest Qatar LLC performed the micro-tunnelling works for the project Design, construction, installation and commissioning of the North Site Utility Extension & Storm water Drainage System and Construction of Junction N20 and West Road.

The project consists of the execution by micro-tunnelling means of the storm-water network Ø2000 mm Inner Diameter pipelines in the South West area of the South Campus to Al Rayyan.

Micro-tunnelling works consist of four drive performed by AVN 1600 + Extension Set to cover the project pipeline diameter.

Works were successfully performed all in accordance with the high standards required.

Ground consisted of weak to medium strong Simsima Limestone.

In 2018, Terratest Qatar LLC performed the micro-tunnelling works for the project EPIC for gas supply to Facility-D at Al Wakrah (Phase-2) to develop natural gas.

The project comprises a natural gas offshore production system with conventional wellhead platforms, interfiled pipelines, and new 36 inch buried and bunded pipeline, approximately 31 km long.

AVN 1,200 was deployed to cover project pipeline diameter. Micro-tunnelling works consist of two drive Ø 1,200 mm ID reinforced concrete sleeve pipes were jacked and then 36'' carbon steel carrier pipes were installed inside by attaching some rolling spider collars and pulling them inside and throughout the already drilled RC pipeline.

Procedure is considered successful once the pipe is already installed and confirmed by pressure test that the line sealed as per technical specifications.

Ground mainly consisted of moderately weak to moderately strong Simsima Limestone layers presenting some cavities created by Sabhka formation which present some challenge at the end of the drive however, works were successfully performed according to the standard.

As part of the specific appointment of the client, Terratest Qatar LLC has been requested to complete a high risk drive in the heart of Zouq, due to the urgent deadline and the soil instability detected (Not compacted backfilling).

The drive has been completed with high performance with very low disturbance of this critical area representative of Doha, solving another challenge for the Project team in Qatar.

The tunnel is a 1.4 m OD diameter and 200 lm length drive, completed successfully in close coordination with client and consultant and direct supervision of ASHGHAL to secure the correct completion as the committed schedule.

Terratest Qatar consider completed the micro-tunneling works with the last drive of 2.4 m diameter in Oryx Rotana area. The drive of 200 m long and 23 m depth has been successfully completed with high pressure groundwater level and the logical difficulties of the reduced working space available.

Has been two year of hard work for completion of a complex project of more than 7,7 km of micro-tunneling with depths up to 24 m in urban area with logistic and space difficulties.

Another relevant success of Terratest Qatar. Congratulations to all the site team.Another relevant success of Terratest Qatar. Congratulations to all the site team.