Neptune Coring

Case Boring

CASE BORING

(aka auger boring)

 

METHOD DESCRIPTION

Horizontal case boring is a trenchless technique that uses an auger boring machine sitting in a track system to drill horizontal boreholes by rotating a cutting head attached to an auger, while at the same time jacking steel casing through the ground.  The auger boring machine generates torque that is transmitted to the cutting head through augers, which stay inside the casing.  Simultaneously the boring machine is pushed forward using hydraulic jacking force.  Spoil is removed from the borehole to the end of the casing by the rotation of the helical-wound auger flights.  The vertical alignment of the auger boring operation can be monitored and measured using a water level and controlled using a steering head. Horizontal alignment is based on the initial setup of the track system in the launch pit, which is placed to the same line and grade as designed.  This setup is critical to the accuracy of the auger boring process.  

Neptune Coring has been using case boring is an economical casing installation method that can be used in a variety of ground conditions to prevent open cutting and minimize ground disturbance for over thirty years.

 

TYPICAL AREAS OF INSTALLATIONS

Roadway & Railway Crossings

Pipeline Right-of-Ways

Buried Utilities

 

MAIN APPLICATIONS

Storm Culverts

Steel Sleeves

 

SOIL CONDITIONS

This method can be used in a variety of soil conditions.

 

DIAMETER RANGE

Case boring can be used to install steel casing from 12” 300mm (12”) – 2125mm (84”).

 

DRIVE LENGTH

12m (40’) – 180m (590’)

 

ACCURACY

Installation can be achieved to a specific grade within 25mm of design.

 

TRENCHLESS TECHNOLOGY SYNERGIES

Case boring used in conjunction with the guided boring machine (GBM) will result in superior grade and alignment accuracy.