1920x400_Products-Foundation_load_testing_products.jpg

Foundation load testing products

Foundation load testing products offer an easy to use and cost-effective solution, that help to improve overall operational safety.

ASLT automatic static load test system

The Auto Static Load Test (ASLT) system is purpose designed to control and monitor static load tests automatically.

The ASLT system is supplied with a rugged site notebook, pre-loaded with the ASLT controlling software and calibration for the transducers.

The system incorporates a data acquisition battery back-up, which allows testing to continue in the event of a power failure, without the loss of any intelligence. 

Improved safety features enable you to monitor tests from a safe distance of up to 25 meters, removing the need for operatives to be in close proximity to potentially dangerous, highly loaded system components.

ASLT


Benefits of the ASLT system:

  • Wireless remote logging increases the safety of site operatives
  • Supplied with fully calibrated load cell to suit required range
  • Data displayed in real-time
  • Power failure protection
  • User friendly software
  • Customised alarming conditions
  • Easy to handle, rugged equipment
  • Complete testing package available

All of our equipment is supplied fully calibrated to UK national standards.

ASLT system specifications  
 Acquisition and control unit
Features

Real-time load and displacement display
Safe and automatic logging of data
Automatic application of test load
Rugged site suitable transducers
ASCII output of data
Automatic report generation

Acquisition unit 16 channel DAQ unit - with input/output channels
Data storage Data files are stored to the connected PC as the test proceeds and includes real-time, elapsed time, load, 4No displacement readings, average settlement and rate of settlement.
Full header information is also stored including site, job number, weather, operator, pile number, pile diameter, pile type, working load, max test load, date and start time. 
Load control Voltage output to suitable hydraulic load maintainer
Dimensions L 550mm x W 450mm x D 120mm  
Weight Approx 12Kg
Connectors Waterproof mil spec and rugged Jaeger type - each uniquely marked
Power 110/250VAC inputs
Displacement transducer type 4No linear potentiometer
Displacement transducer range 0-100mm
Displacement transducer resolution 0.01mm
Load cell type Stainless steel, non-indicating compression type, IP68 protected
Load cell range 25 to 1000 Te
Operating temperature -20°C to +65°C
Accuracy ± 0.3% of applied load
Pressure transducer (optional) 0-700bar, IP67 protection, 0.25% accuracy, operating temperature range -20°C to +65°C
Real-time display Average settlement v load curve
Settlement for each displacement transducer
Load
Load v template curve
Rate of settlement
Print output Table: Time, elapsed time, displacements, load and settlement rate
Graph: Applied load v settlement
Graph: Applied load and settlement v time

Data acquisition, pump control and data storage is all controlled by the user friendly ASLT software, and operated within Windows operating systems.

The software enables the operator to set up and save loading templates, as well as review and alter alarm settings accordingly. As the test proceeds the user can view all of the data in real-time and view plots of load versus settlement.

Displacement gauges can be calibrated in-situ with supplied gauge block and re-set remotely. Should the test be halted for any reason e.g. power failure, there are routines which enable the test to recommence without any loss of data.

The load, deflection and load maintainer readings are collected by the ASLT data logger and downloaded to a rugged on site PC. All data is presented in accordance with Eurocode7-EN-1997, the European standard for design of geotechnical structures.

Our user friendly system allows data to be viewed in real-time, comparing plots of load versus settlement as testing progresses. The software enables users to set up and save loading templates, and to also review and alter alarm settings accordingly.


SIMBAT dynamic pile test system

SIMBAT is widely regarded as the most accurate high strain dynamic pile testing method available.

Suitable for both cast-in place and pre-cast piles, the SIMBAT technique was first developed in the 1980's before being further developed by JF Strainstall, and gained in popularity over traditional dynamic testing techniques.

The core differences between SIMBAT and more traditional dynamic load testing techniques are:

  • A high speed optical / digital theodolite is used to record real-time displacement
  • A series of high and low strain blows are used so reactions are determined without assuming soil damping factors
  • Displacement data from the theodolite is used to correct accelerometer data
  • Simulation model is based on accurate displacement rather than calculated velocity

These differences mean that SIMBAT has been independently rated as the most accurate high strain dynamic testing method available.

Dynamic pile testing is generally seen as a much quicker and more cost effective performance test than traditional static test methods.

 

SIMBAT


Benefits of the SIMBAT dynamic pile testing system:

  • Most accurate high strain dynamic testing method available
  • Unique theodolite measures elastic and permanent displacement remotely
  • Instant dynamic reaction and displacement readings
  • Rugged and lightweight, hand-held acquisition unit
  • Storage for over 700 results
  • Backlit LCD screen for working in dark environments

All of our equipment is supplied fully calibrated to UK national standards.

SIMBAT system specifications  
Acquisition unit
Features

Daylight viewable screen
Tactile large keys for operating with gloves
Low power with long battery life
Flash memory for instant start up and power down
Instant dynamic reaction and displacement readings
Rugged lightweight unit with waterproof connectors   

Keypad Sealed colour coded and full alphanumeric keypad, tactile and audio feedback 
Operating temperature  0 to +50°C
Display Monochrome LCD transflective with backlight
Contrast adjustable keypad
Display area 122mm x 70mm
Protective anti-reflective glass
Acquisition 4 channel, 16 bit acquisition at 10KHz sample rate
Pre-trigger, auto gain and auto balancing of strain gauges 
Frequency range 10KHz
Storage 700+ results including data sets for force, acceleration, displacement per pile with full header information and date/time stamp
Connectors Waterproof lemo type, each with unique configuration
Power Battery: 1.2V NiMH rechargeable AA cells
Auto power off and battery indicator
Battery life 8 hours + operation on full charge
Charge time Approx 6 hours
Charging External wall plug-in adapter for 110-240VAC inputs (trickle charge)
External cigar plug-in charger for 12-32VDC inputs (fast charge)
Dimensions L 128mm x W 187mm x D 55mm
Weight 1.35Kg
Theodolite
Type High speed optical theodolite with laser targeting and LED target illumination
Measures elastic and permanent settlement
Battery NiMH rechargeable, 6 hours + on full charge
Charger External wall plug-in adapter for 110-240VAC inputs
External cigar plug-in charger for 12-32VDC inputs
Accuracy 0.14mm at 5m distance
SIMBAT sensors  
Accelerometers 2No 5000g 'shock' type with ICP power supply
Strain gauges 60mm foil type strain gauges

The SIMBAT software is an easy to use Windows based platform for analysing results and producing reports.

Modules enable you to calculate the impedance of the pile test cap and pile shaft separately, as well as analyse each blow individually to determine dynamic reaction and displacement.

The software can present results in tabular format, as well as presenting the separation of forces curves and the predicated static load settlement plot.

An integral part of the SIMBAT software is a numerical simulation, whereby experimental signals are introduced into the programme and compared with theoretically generated signals. Skin friction and end bearing components of the pile / soil system can then be derived.

The SIMBAT method is based on the reproduction of waves in long elastic cylinders.

When the pile is struck with a falling weight the pile section is deformed (enlarged) and this enlargement travels down the pile to the toe where it is reflected back up. In a free, un-damped pile the particle velocity of the return wave would be identical to the original wave.

When the pile is surrounded and re-strained by soil, part of the wave is reflected back up at each and every external restraint, the remainder of the wave continues downwards. So at any one time there are both upwards and downwards forces and velocities in the pile.

The SIMBAT technique separates these forces and calculates the dynamic soil reaction, as the difference between  the upwards force in a free pile and the real upwards force measured. 


 SLT2 static load test system

The SLT2 is a purpose designed system for monitoring static pile test and improving operation safety.

SLT2 is a highly accurate and robust system that enables you to monitor static pile tests whilst also ensuring the safety of site operatives.

Featuring a 25m cable, users are able to monitor safely and accurately from distance, eliminating the need for personnel to enter potentially dangerous testing zones.

The user friendly software allows operators to view data in real-time whilst plotting the load settlement data as the test progresses. Should the test be stopped for any reason, there are back up routines which enable testing to recommence without any loss of data.

 

SLT2


Benefits of the SLT2 system:

  • Rugged transducers suitable for use on construction sites
  • Will work with any notebook PC
  • Displacement and load displayed in real-time
  • Load / settlement graph plotted in real-time
  • Full equipment training available
  • Complete test package available

All of our equipment is supplied fully calibrated to UK national standards.

SLT2 system specifications  
Acquisition unit
Features Real-time load and displacement display
Safe and automatic logging of data
Rugged site suitable transducers
ASCII output of data
Automatic report generation
Acquisition unit 8 channel DAQ unit
Data storage Data files are stored to the connected PC as the test proceeds and includes real-time, elapsed time, load, 4No displacement readings, average settlement and rate of settlement
Full header information is also stored including site, job number, weather. operator, pile number, pile diameter, pile type, working load, max test load, date and start time
Dimensions L 218mm x W 187mm x D 55mm
Weight Approx 6Kg
Connectors Waterproof Mil spec and rugged Jaeger type, each uniquely marked
Power 110/250VAC inputs - can be battery powered by 12VDC/250VAC power converter which can also power site PC
Displacement transducer type 4No linear potentiometer
Displacement transducer range 0-100mm
Displacement transducer resolution 0.01mm
Load cell type Stainless steel, non-indicating compression type, IP68 protected
Load cell range 25 to 1000 Te
Operating temperature  -20°C to +65°C
Accuracy ± 0.3% of applied load
Pressure transducer (optional) 0-700Bar, IP67 protection, 0.25% accuracy, operating temperature range -20°C to +65°C
Real-time display

Average settlement v load curve
Settlement for each displacement transducer
Load
Rate of settlement

Print display Table: Time, elapsed time, displacements, load and settlement rate
Graph: Applied load v settlement
Graph: Applied load and settlement v time

The SLT2 logging software is designed to operate on a PC with Windows operating software, and the data acquisition unit is connected to the PC running this software during the test.

There are two viewports to the software:

Data viewport - This enables you to enter the site details, calibrate and zero transducers, view load and settlement in real-time and also plot the load test in progress. Displayed transducer readings are refreshed every second.

Table viewport - This enables you to view a table of values saved during the tests at one minute intervals. This includes time, elapsed time, load (KN), individual gauge displacements (mm), average settlement (mm) and rate of settlement (mm/hr).

Printing

Once a test is stopped it is possible to print the following results:

  • Table of results showing time, elapsed time, displacement readings, load readings and settlement rate
  • Graph of applied load versus settlement at the pile head
  • Graph of applied load and settlement at pile head versus elapsed time

All data is sorted in ASCII format making it possible to export and use in other applications.

BACK TO TOP