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Trenchless construction includes such construction methods as tunneling, microtunneling (MTM), horizontal directional drilling (HDD) also known as directional boring, pipe ramming (PR), pipe jacking (PJ), moling, horizontal auger boring (HAB) and other methods for the installation of pipelines and cables below the ground with minimal excavation.
Directional boring machine. Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig.
Boring is drilling a hole, tunnel, or well in the Earth. It is used for various applications in geology, agriculture, hydrology, civil engineering, and mineral exploration. Today, most Earth drilling serves one of the following purposes: return samples of the soil and/or rock through which the drill passes; access rocks from which material can ...
Tunnels are excavated through hard rock, wet or dry soil, or sand, each of which requires specialized technology. Tunnel boring machines are an alternative to drilling and blasting (D&B) methods and "hand mining". TBMs limit the disturbance to the surrounding ground and produce a smooth tunnel wall.
San Francisco startup Petra demonstrated a thermal drilling robot that can tunnel through Sioux Quartzite, "the hardest rock on earth" that would normally require dynamite. It can create 18–60 in (460–1,520 mm) diameter tunnels. It disintegrates the rock with a hot, high-pressure spallation head. The machine combines remote control and ...
The study of Massachusetts Institute of Technology "The Future of Geothermal Energy – Impact of Enhanced Geothermal Systems (EGS) on the United States in the 21st Century" (2006) points out the essential importance of developing an economical deep geothermal boring technology. With old boring technologies, bore price rises exponentially with ...
In 1988, Michels became a pioneer in trenchless construction by mastering the new technology of horizontal directional drilling. To this day, Michels is an award-winner and record-holder in many techniques used for the trenchless installation and rehabilitation of utility lines. [2]
TT Technologies is a construction equipment manufacturer producing microtunneling and trenchless products. [1]TTT was founded in 1991, and is based in Aurora, Illinois. [2]The company received an innovative product award from the North American Society for Trenchless Technology (NASTT) in December 2015 for a mini directional drill called the Grundopit K-keyhole.