Assesses cleanliness and competency of the bottom of drilled shaft or bored piles.
SQUID performs a quantitative assessment of the bottom surface. It measures both the thickness of soft material or debris that might be covering the bearing strata and the strength of the bearing layer. It outputs strength versus penetration in numerical and graphical form.
An important part of bored pile construction is the cleaning and inspection of the bottom of the hole prior to the placement of reinforcement and concrete. To achieve cleaning once drilling is complete, a cleanout bucket is typically used to remove any material unsuitable for end bearing support. Bottom inspection is then performed, often by lowering a camera down the bore hole, a procedure that gives a rough idea of the thickness of any debris left at the bottom. SQUID provides an alternative, more accurate inspection process; it takes accurate displacement and penetrometer measurements, providing an objective, quantitative assessment.
Standard Features:
- SQUID Body includes quick attachment adaptors for different sized drill stem or Kelly bars.
- Three independent displacement versus pressure (from cone penetrometers) measurements.
- SQUID Tablet receives data wirelessly.
The SQUID Measures:
- Independent displacement of three penetrometers into the soil layer. The displacement measurement begins with the first encounter of the layer.
- Thickness of the debris layer at various locations along the borehole bottom.
- Bearing pressure of three independent standard size (10 cm2 ) cone penetrometers.
Specifications SQUID Tablet
- Size: 320 x 250 x 68 mm (12.6 x 9.8 x 2.7 in)
- Weight: 5 Kg (11 lbs)
- Temperature Range: 0 to 40°C operating; -20 to 65°C storage
- Display: 26.4 cm (10.4 in), sunlight readable, resolution 1024 x 768; capacitive touch screen
- Video Outputs: HDMI, VGA
- Battery Power: 4 hour continuous data collection 12 V battery + back-up battery standard
- Charging Time: 6 Hours max; 120/240 charger input voltage
- Operating System: Microsoft Windows® 7
- Data storage and ports: 60 GB SSD internal drive; Ethernet port; 4 USB ports
- Optional External Accessories: USB keyboard and mouse
- Remote Operation: SQUID Tablet is equipped for high speed internet access and remote operation
- Technical Support: SQUID Tablet is equipped for remote error checking and updating
- Units of Operation: Traditional US, SI, or Metric
- Full one year warranty on parts and labor
SQUID Penetrometers
- Material: Stainless Steel
- Number of Penetrometers: 3 standard
- Penetrometer Tip: area 10 cm² (1.55 in²) standard, larger tips optional; replaceable
- Maximum Penetrometer Pressure: 100 MPa (14 ksi/2000 ksf)
- Penetrometer Pressure Measurement Resolution: 0.1 MPa (14 psi/2 ksf)
- Maximum Depth of Penetration: 150 mm (6 in)
Wireless Transmitter
- Transmission Range: 100 m
- Frequency: 2.4 GHz
- Output Power: 18 dBm
- Mounting: On cable reel
- Temperature Range: -10 to 55°C operating; -20 to 70°C storage
SQUID Contact Plate(s)
- Size: 152 mm (6 in) OD; 46 mm (1.8 in) ID; thickness 25.4 mm (1 in)
- Each Contact Plate Assembly Weight: in air 6.75 kg (14.9 lbs); in water: 5.85 kg (12.9 lbs)
- Contact Plate Pressure (free to move): in air 4 kPa (0.58 psi/0.083 ksf); in water 3.5 kPa (0.50 psi/0.072 ksf)
- Contact Plate Displacement Measurement Resolution: 0.004 mm (0.0002”)
- Maximum Contact Plate Movement: 150 mm (6 in)