ShapeArray SAAScan

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Built for rapid deployment and repeated use. The instrument of choice for one-shot verification of the alignment of jet-grouting holes. Thick-walled 500 mm segments provide great spatial detail and resist damage.

Product supplied by Measurand.

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Overview

Designed to be used, moved, and re-used as quickly as possible, SAAScan is ideal for applications where borehole shape must be measured repeatedly—jet grouting and borehole drilling, for example. SAAScan’s robust and durable construction combines twist-resistant joints and thick-walled stainless steel segments. The construction contains a compact array of MEMS gravity sensors.

SAAScan saves time and money. It is a reel-based system enabling the measurement of hundreds of holes. A unique extension hose and cable terminator allows SAAScan to remain anchored on the reel while the rest of the array length is installed to collect accurate real-time data.

SAAScan’s segment length is 500 mm. SAAScan can be manufactured to a standard length of up to 50 m. Contact Measurand to inquire about custom lengths. All ShapeArrays™ are manufactured in an ISO 9001 certified facility.


PHYSICAL PROPERTIES

ITEM SPECIFICATION
SEGMENT LENGTH 500 mm joint centre to joint centre
STANDARD LENGTH OF SAASCAN Up to 50 m
CUSTOM LENGTH OF SAASCAN Over standard length, contact Measurand for details*
LENGTH OF FAR TIP EYEBOLT 32 mm
LENGTH OF UNSENSORIZED NEAR CABLE
END SEGMENT
Standard 8.2 m
(includes: 330 mm Cable Terminator Segment and 7.9 m Hydraulic Hose)
LENGTH OF COMMUNICATION CABLE Standard 15 m, (extending past the extension hose
and cable terminator)
MAXIMUM DIAMETER 23 MM
WEIGHT 1.0 kg/m
OPERATING TEMPERATURE -40°C to 60°C
WATERPROOF TO 2000 kPa (200 m Water)
MAXIMUM TENSILE RESISTANCE  550 kgf
MAXIMUM JOINT BEND ANGLES 70°
POWER REQUIREMENTS 12 VDC at 1.8 mA/segment

 

ELASTIC TWIST TOLERANCE

ITEM SPECIFICATION
MAXIMUM TORQUE FOR ELASTIC RETURN1 2.0 N-m per joint
TWIST TOLERANCE1 0.5° per joint
ACCURACY OF RETURN FOR ELASTIC TWIST1 ±0.01° per joint

 

STATIC SHAPE MEASUREMENTS

ITEM SPECIFICATION
ANGULAR RANGE OF MEMS SENSORS ± 360° (software selection required for 2D/3D modes)
RANGE OF 3D MODE (VERTICAL) ± 60° with respect to vertical (SAARecorder alert at ±70° w.r.t. vertical)
RANGE OF 2D MODE (HORIZONTAL) ± 60° with respect to horizontal
RANGE OF 2D MODE (MIXED H/V) ± 180° with respect to horizontal
ACCURACY OF ABSOLUTE SHAPE1,2,4,5 ± 10 mm for 30 m SAAScan
RESOLUTION 0.00067° (0.012 mm/m)
ACCURACY OF TILT/SEGMENT WITHIN 20° OF
VERTICAL2,4,5
± 0.0005 rad = 0.029°
SYSTEM PRECISION3,4,5 ± 0.5 mm for 30 m SAAScan
SEGMENT PRECISION6 ± 0.0005° (0.01 mm/m) (68% confidence interval)
± 0.0050° (0.09 mm/m) (99.7% confidence interval)
SENSOR 24H STABILITY7 ± 0.01 mm/m (68% confidence interval)
± 0.03 mm/m (99% confidence interval)
AZIMUTH ERROR IN JOINTS < ±0.01°n

1 Measured at 20°C, with X-Mark facing a consistent direction.
2 Long term measurement value based on field measurements of vertical arrays > 1 year of operation.
3 Short-term measurement ≤ 24 h.
4 Value based on Average in Array (AIA) setting of 1000 samples.
5 Specification is for 3D mode within ± 15° of vertical. Vertical accuracy degrades with angular deviation from the vertical.
6 Sample size for segment precision is 540,000 readings. Data was collected for 3 different positions within +/- 10° of the X, Y,
and Z axes. Figures provided fall within 99.7% confidence interval (3-sigma value).
7 24 h stability is the maximum change in the sensor readings in a 24 h period for an instrument installed in repeatability
conditions. Sample size is 7,200 samples for each 24 h period reviewed.
* Caution: Long SAAScans are heavy and winches would be involved in installing them.

File Name

ShapeArray Brochure

Resource Type

Brochure
Language Version Download
English 4.0_2021

Speak with an Expert

I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
 
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd