Equipment: Vermeer® 24x40SII; StraightLine® 4″ Air Hammer System; Ingersoll Rand 1150 cfm x 350 psi portable air compressor The Challenge: Trawick encountered a bore in North Little Rock, Arkansas that was 310 foot in length. The ground condition presented a challenge due to the ever changing sub surface conditions, ranging from clay, gravel, limestone, shale, … Continued
Equipment: Ditch Witch®JT4020 – Sullair 900/350 compressor – StraightLine® 4″ Air Hammer System Ground Conditions: 30″ of clay cover, solid rock underneath. Drilling Fluid & Flow Rate: NO fluid, bore was without the use of fluids. Project: placing 3 ducts for expansion of a fiber network. Bore was just over 300′ in length. Obstacles: this … Continued
Equipment: JT2020 and a StraightLine® 4″ Air Hammer System. Ground conditions: approximately 12 to 18″ of top soil with solid limestone formation underneath. Project Scope and Requirements: this project consisted of 70 replacement water services. 1″ copper lines were placed under the roadway at a minimum cover of 4′. The bore that is featured was … Continued
Equipment: Vermeer® D36x50 and a StraightLine® 4″ Air Hammer System. Ground conditions: Solid formation with a combination of sandstone and caliche. Project Scope and Requirements: Installing a 10″ PVC pipe with certa-lock joints placed on-grade at a minus .020 to a minus .030 percent slope for gravity sewer mains. The bores varied in length from … Continued
Ground conditions: Solid limestone and iron rock Project: Placing conduits for power and control cables for a wind generator farm. Bores ranged from 150-200′; installing 6-inch conduit for main electric cables to deliver the generated power & a 2-inch conduit for the control cables at a spacing of 3-feet apart. The conduits were placed by … Continued
Equipment: Vermeer® 24x40a and a StraightLine® 5″ Air Hammer System. This combination allowed excellent penetration rates in the granite while also providing the flexibility needed to accomplish the vast grade changes. Ground conditions: Bore length was just over 300′, the first 200′ was solid granite and the last 150′ was 60% granite and the balance … Continued
Equipment: Astec® DD3238 and a StraightLine® 4″ Air Hammer System. Ground conditions: First 90 feet consisted of dirt and rocks smaller than 3-feet, the last 100-feet was solid granite. Project: Water service requiring a minimum 3-foot of cover that totaled 190′ in length. Over the course of the bore the elevation rose 40-feet. Entered the … Continued
Equipment: Astec® DD3238 and a StraightLine® 4″ Air Hammer System. Ground conditions:Clay soil with 3 x 10+ foot diameter granite boulders in the bore path. Project: water service requiring a minimum 3-feet of cover that totaled 90-feet in length. Entered the ground at a minus 18%, drilled conventionally until a boulder was encountered, engaged the … Continued
