천공말뚝 선단지지력 측정기 Shaft Quantitative Inspection Device (SQUID)

천공말뚝 선단지지력 측정기Shaft Quantitative Inspection Device (SQUID)

2017_7

 

SQUID provides force and displacement readings registered at the bottom of a drilled hole to quantitatively assess the cleanliness or the debris thickness of the excavation bottom (i.e. drilled hole). The construction process of drilled shafts is carried out using major drilling tools to cut through the soil and rock strata, which consequently generates some amount of soil cuttings, a portion of which could end up at the bottom of the excavation. If the wet construction method is implemented, the drilling mud (polymer-based or bentonite-based) will generate sediment which can accumulate at the bottom of the hole, which if undetected can negatively influence the performance of the foundation element.

 

천공말뚝 선단지지력 측정기(SQUID)는 천공말뚝의 하단 (말뚝선단)의 정리 상태, 슬라임 두께를 수치적으로 평가하기 위해 천공 하부에서 응력, 변위 값을 측정. 굴착 시 굴착면 하부에 슬라임이 남을 수 있고 물 주입 방법이 사용되면서 진흙 (폴리머 기반 또는 벤토나이트 기반)은 침전물을 생성하여 천공 바닥에 쌓일 수 있다. 이것이 확인되지 제거하지 않으면 기초말뚝의 성능에 부정적인 영향을 줄 수 있다. 

The SQUID device and test will assess the drilled shaft base conditions in a time efficient manner, and with quantitative measurements. In addition, this test provides beneficial advantages such as: 장점 - Debris thickness up to 6-inches 최대6인치 두께. - Force and displacement associated with the debris material 하중 침하 기록 - Quick attachment to the Kelly bar 시공기 하단 설치 - Entire testing procedure takes minutes from start to finish 측정이 신속하다. - Wireless unit to expedite the test procedure 무선장치로 시험절차가 신속하다. - SiteLink® capability to perform remote tests 원격시험가능. As a test focused on Quality Assurance/Quality Control of deep foundations, SQUID offers advantages in test duration and time, which have significant impact on the overall cost of a project. In addition, the SQUID test provides quantitative measurements to define and identify debris thickness based on force and displacement measurements. 말뚝 품질 관리에 중점을 둔 시험으로 SQUID는 시간면에서 비용절감. 또한, SQUID 시험은 응력 변위 측정을 기반으로 이물질 두께를 확인, 식별하기 위한 자료를 제공한다.

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)

 

SQUID Body

• Size (height x hexagon largest diagonal): 629 x 647 mm (24.75 x 25.5 inches)

• Weight: 188 kg (415 lbs) (including penetrometers and contact plates)

• Material: Stainless Steel and Aluminum

• Standard Kelly Bar Connector Sizes: 101.6 mm² (4 in²), 152.4 mm² (6 in²), 203.2 mm² (8 in²)

• Cable Length: 61 m (200 ft) standard; 152m (500ft) cable length optional

• Temperature Range: -20 to 55°C operating; -40 to +85°C Storage

• Applied Force Limit: 135 kN (30 kips)