Kuwait Directional Drilling

Hand tunneling is the excavation and installation of fixed conventional tunnel supports at the tunnel heading by tunnel miners. We can literally create practically any size, shape or length tunnel by hand. The method’s adaptability is exceeded only by its flexibility when encountering unexpected conditions such as buried utilities or unknown or difficult soil conditions. And while the hand tunneling method may be hundreds of years old and what we call “Iron Age Tunneling”, the excavation tools, tunnel support materials, and engineering are 21st century state of the art. Hand tunneling can be very effective in soils below the water table when combined with ground stabilization methods such as dewatering, chemical and cement grouting, and/or compressed air tunneling. Hand tunneling is generally the slowest and often the most costly tunneling method, yet it often provides the least risky option to the client when potential unknowns are a factor.

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TARGET TRENCHLESS KUWAIT

Directional Drilling - Micro Tunneling - Shaft Sinking - Pipe Line CCTV - Sewer Rehab

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Hand tunneling is typically performed by tunnel miners using pneumatic hand tools to excavate the soils and then installing wood and/or steel supports for tunnels 60” OD or larger. For 96” OD and larger hand tunnels, Target Kuwait is the utility industry leader in Kuwait at using the hand tunneling method. Hand tunnels can be square, circular, elliptical, or horseshoe in shape. Spoil removal is conducted by rail car or in larger diameter tunnels, by rubber tired or track loaders. Whether used with simple wood and/or steel tunnel supports hand tunneling continues to have a place in today's tunneling market. Cobbles, boulders, and hard rock are all potentially insurmountable obstacles for modern small diameter tunnel boring machines, but are generally minor impediments to hand tunneling. In fact, hard rock (>200 MPA) is ideal drill and blast hand tunneling conditions, yet extremely difficult to impossible conditions for TBMs below 8' in diameter.

It is an essential pre-requisite for any potential pipejack to complete a thorough study of the prevailing geology to be made available to all interested parties at an early stage. This is the only way of ensuring a cost-effective solution to any given problem. The Pipe Jacking technique is for installing underground pipelines, ducts and culverts without the use of open trenches.

Powerful hydraulic jacks are used to push specially designed pipes through the ground behind a shield at the same time as excavation is taking place within the shield. The technique ensures a structural sound and watertight finished pipeline.There is no theoretical limit to the length of individual pipe jacks although practical engineering considerations and costs may impose restrictions. Drives of several hundred metres either in a straight line or to a radius are routine have been completed by Jacked pipelines. Construction tolerances are compatible with other tunneling methods and the pipe jacking method generally requires less over-break than segmental tunnels, providing better ground support.