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YieldPoint Inc.
dCable Geotechnical Instrumented Cable
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YieldPoint’s d-Cable technology provides engineers, technicians, consultants and contractors with a digital instrumented 7-strand cable for geotechnical monitoring. This instrument tracks how the load develops its own length of 7-wire stand cable bolt over time. It allows a reliable assessment of the Factor of Safety against cable rupture. The instrument is applicable to cable bolts, ground anchors, tendons, and tie-backs used in all types of mining and civil projects. It has the potential to help predict the risk of catastrophic structural failure: in fact d-Cable data can enhance many aspects of engineering design, installation quality control, long-term operation assessment, and rehabilitation. Click here for a case study.
YieldPoint’s d-Cable technology provides engineers, technicians, consultants and contractors with a digital instrumented 7-strand cable for geotechnical monitoring. This instrument tracks how the load develops its own length of 7-wire stand cable bolt over time. It allows a reliable assessment of the Factor of Safety against cable rupture. The instrument is applicable to cable bolts, ground anchors, tendons, and tie-backs used in all types of mining and civil projects. It has the potential to help predict the risk of catastrophic structural failure: in fact d-Cable data can enhance many aspects of engineering design, installation quality control, long-term operation assessment, and rehabilitation. Click here for a case study.
The d-Cable is indistinguishable from a regular cable and deployment simply involves replacing a regular cable with its instrumented equivalent. During cementing/grouting no special procedures need to be followed. The readout head of the d-Cable has the same diameter as the 7-wire strand itself, and therefore grips and a jack can be applied over the readout head if the cable is to be plated. If no face-plate is required the readout head can simply be recessed into the collar of the hole.
Features:
Instrumented 7-wire strand cable applicable to plain strand, bulb (Garford) cables
Applicable to grouted cables and cables spun in resin
Both Head-at-Collar (HAC) and Head-at-Toe (HAT) configurations possible
HAT configuration routes leadwire through a continuous steel tube
Available with mm or tons readout, please specify your preference
Available with 1 (d1Cable) to 6 (d6Cable) strain gauges
Microcontroller provides output directly in load (tons) or displacement (mm)
Individually calibrated, calibrations sheets available
Immunity to hostile environment
High survivability to shock and vibration
Easy to install and maintain
Digital (d-Tech) instrumented cable with RS485 signal out
Technology:
The d-Cable is based on miniature inductive strain gauges small enough to be recessed into a surrogate tubular king-wire. The gauges are configured with custom base-lengths between 200mm and 2,000mm. When the ends of the strain-gauge are secured (usually swaged) the instrument will measure how a certain length of the cable bolt is stretching in response to load. The base-length between the ends of the strain-gauges is specified by the customer. During manufacturing the entire strain-gauge array is independently manufactured and calibrated and then recessed into the king-wire and swaged in place.
The technology can be manufactured in HAC or HAT configurations. The HAT configuration is suitable for cables that are installed with a face plate, and the leadwires are returned through a continuous stainless steel tube.