In trenchless construction, a live line is any underground utility pipe or cable that is actively in operation. The term can refer to energized electrical lines, water/wastewater pipes, oil and gas pipelines, etc. During trenchless operations, determining the location of these lines is critical in… View Full Term
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By: Tabitha Mishra | Civil Engineer, Technical Content Writer
By: Denise Sullivan | Technical Writer @ Trenchlesspedia
An invert level is defined as the elevation of the inside-bottom of a pipe, trench, culvert, or tunnel. It may also be considered the "floor level" of a pipe. Invert levels are essential for assessing the flow in a piping system. For example, the invert of a municipal sewer…
A backdrop manhole is a drop shaft installed either externally or internally in a manhole in a sewer network. Backdrop manholes connect pipes of differing invert levels and allow for the pipe at a higher level to connect to the lower level pipe with minimum fall. Typically, backdrop…
Hoop stress is the stress that occurs along the pipe’s circumference when pressure is applied. Hoop stress acts perpendicular to the axial direction. Hoop stresses are tensile and generated to resist the bursting effect that results from the application of pressure. Three principal…
Site investigation is an integral part of any construction project, and should be attributed as much significance as would be ascribed to any other part of the project. The risk associated with undertaking a project without adequate site investigation is monumental. It's wiser to be…
By: Tabitha Mishra
Joining pipes is one of the most vital aspects of completing any plumbing job, whether it's new or a rehabilitation. The pipe joints must withstand the pressure from each line going through the joint. To employ the best pipe joining method, workers must understand the different…
By: Denise Sullivan
Horizontal directional drilling (HDD) is a conventional method employed by cities and construction workers to install utilities and plumbing underground. Unlike traditional underground installation, HDD does not require open trenches to complete. Equipment Needed for HDD As horizontal…
The gel strength of drilling mud (or drilling fluid) is the shear stress in the fluid at a low shear rate after it has been static for a specific period of time. The parameter gives a measure of the inter-particle forces in the mud once drilling has stopped. The gel strength is one of the…
By: bdbolin
Aging sewer pipelines is a growing concern in many municipalities. This issue has led to an increase in activity aimed at rebuilding or rehabilitating current sewage infrastructure. However, it is often necessary that existing sewer systems remain operational during ongoing construction…
Tunnel boring machines (TBMs) and microtunnel boring machines (MTBMs) are used to construct underground tunnels and passages with circular cross-sections. They both use a drilling mechanism, known as a cutting head, to remove material and advance the equipment forward. However, both these…
Horizontal Auger Boring offers a streamlined approach to installing underground pipelines, conduits, and cables without the need for extensive excavation. But, like any…
By: Trenchlesspedia Staff
There are two primary methodologies within the realm of underground construction: trenchless and cut-and-cover. Both methods have distinctive characteristics and…
Trenchless methods are efficient and environmentally sustainable options for many projects, but require careful consideration of the equipment used. To select the most…
In the fields of engineering and construction, pipe repair is essential to the upkeep and maintenance of infrastructure. My role as a managing partner at Devco…
By: Chad Decker | Founding Partner, Devco Development and Engineering
Pipe bursting is an advanced trenchless solution designed to replace deteriorating pipes without the need for extensive excavation. By employing different techniques,…
When it comes to trenchless excavation, choosing the right trenchless boring method is crucial to the success of your project. Trenchless boring, also known as…
Horizontal directional drilling (HDD) and auger boring are two common methods of trenchless excavation used in construction projects. Both methods offer unique benefits…
Trenchless technology has revolutionized the construction industry in the past few decades. With the advent of trenchless techniques like pipe jacking and…
The inadvertent return of drilling fluid is common in horizontal directional drilling (HDD) projects, and though not harmful to the environment, inadvertent returns are…
Requirements for horizontal directional drilling (HDD) environmental planning and construction monitoring vary greatly across North America, but regulatory obligations…
Well-used drilling fluid will be full of unwanted solid content from the borehole after a drilling operation. The drilling fluid picks up all the soil and rock cuttings…
Horizontal Directional Drilling (HDD) is often a preferred trenchless pipe installation approach. It is completed in multiple stages including pullback, where a large…
By: Della Anggabrata | Civil Engineer
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Krystal is a civil engineer and project manager with an MSc in Construction Engineering and Management. Her experience includes the project…
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Klaus joined SAERTEX multiCom LP in 2019, first responsible for the business development in North America and from MAY 2020 as Managing Director.He…
J. Mark Hutchinson is a Mud Engineer Consultant at RightTurn Supply, LLC.