Reasonable limits must be placed on maximum fluid pressures in the annular space of the bore to prevent inadvertent drilling fluid returns to the ground surface. If you want to help out with the hosting and other costs of running along with , then please take a look at the donate page. excavation during the horizontal directional drilling process and the risk of hydraulic fracturing. Running these sites is getting expensive. Imagine THAT in your driveway and 50 feet from your front door. Hopefully PennEast will not be banging on that pipe in three in the morning, so who knows how long this job will take? According to the HDD plans they will be boring and pushing/pulling for around half a mile…. They used something called a “300-ton Herrenknecht Pipe Thruster” to get the job done. Working non stop day and night it took 10 days to complete the HDD installation. In that case of that project, the construction crew worked 24/7 to get the job done (it was blocking a freeway express ramp). Now what will all this HDD construction look like? We don’t know for sure yet, but here’s a sample of a 36″ pipe being HDD’d down in Florida: I used the Google Earth measuring tool to check the distance from the construction zone to her house – as you can see it’s less than 50 feet! Here’s what it looks like in Google Earth: With the most recent route change, her front door is now proposed to be home to an HDD construction pad.Īs you can see, they plan on using her driveway as a construction access road, and then staging the HDD site across her driveway and in her front yard.
As route change after route change has come it has danced slightly all around her farm. Carla is a member of HALT PennEast, and has been staunchly against the project from the beginning. One such spot is Carla Kelly-Mackey’s farm on Sanford Road in Delaware Township. Plus, there is a very large construction impact at the entry/exit points where the HDD enters/exits the ground. The downside is that it’s often very difficult to do, its success depends upon geology, and when it fails it can be very, very bad indeed. The upside is there’s no trench and no need to clear cut. HDD involves drilling a bore hole under ground instead, and then either pulling or pushing the pipe through that. Usually natural gas pipelines are built by trenching down in the ground 6-9 feet deep, then covering up the pipe once it’s installed. Other solutions such as Pipe Ramming or Directional Drilling can be suitably applied.Horizontal Directional Drilling, or HDD, is sold by pipeline companies as a panacea for a host of problems with pipeline routes. Typically, wet running or high frequency boulders preclude the selection of this method. Sometimes ground conditions present such a problem that this method is not suited. What are alternatives to Auger Boring?Īuger Boring is a familiar and common trenchless method. pressure pipe), length of installation and work right of way. Additional considerations that must be made are carrier pipe type, project type (on-grade vs. A good geo-technical report is a great resource in the design of an auger bore project. The key to any successful trenchless project is a well founded understanding of the soils conditions.
What are considerations for Auger Bore design? The rotating augers carry the spoil to the back of the casing pipe for removal by muck bucket, excavator or conveyor. Hydraulic jacks located on the bore machine in the sending shaft provide the thrust that push the casing thought the ground. A cutting head is attached to the 'lead' auger and can protrude just ahead, sit flush, or sit within the casing depending on the job requirements.
Auger boring, often referred to as 'jack and bore', is a method of installation that simultaneously ‘jacks’ casing while rotating helical augers within the casing removes spoil.