Geotechnical Instruments installation and monitoring service

The Geotechnical Instruments division has staff with hands-on experience in many procedures and work environments. There are installation procedures for each instrument for use in quality control of installation work as a standard. In the measurement of geotechnical instruments work we are equipped with professional employees, with in-field experience in measuring work. Furthermore, there are measurement and automatic data recording with remote data transmission systems, including a Database Management System To be used for applications with large amounts of measurement data which can be divided into 4 major categories : 
 

2.1 Instrument for measuring groundwater level or pore pressure.  This is an instrument used to measure water changes or soil water pressure, Instruments in use
 
  • Observation Well   This is an instrument for measuring groundwater level in the well or bore hole.
     

                   
 

  • Piezometer  This is a device used for measuring the water pressure or Pore Water Pressure In the soil at different depths. The most popular types are Standpipe Piezometer, Pneumatic Piezometer and Electric Piezometer.
 
              

2.2  Soil mass movement indicator   This is an instrument used for measuring the movement of soil mass on the horizontal or vertical axis. These include:
 
  • Surface Settlement Point   This is an instrument for measuring subsidence at the soil surface by placing a steel plate attached to a steel pipe at the desired location and using a surveyor's telescope to measure the end of the pipe to determine the subsidence.
 
                     
                                  

  • Inclinometer a tool used to measure the movement of soil mass deep underground. There are 2 ways that the pipes can be installed, which are 1. Vertically Installing the pipes to measure the Lateral Movement and 2. Installing the pipe horizontally to measure the movement of the soil in the Vertical Movement. The components of the tool consist of an inclined measuring tube (Inclinometer Casing). This Is a special pipe with 4 grooves inside perpendicular so that the Inclinometer Probe can run up and down along this groove where-by measuring will drop the probe into the pipe to the bottom and then the probe will slowly be pulled up whilst recording the inclination every 0.5 meters while being pulled back.
     

                  
     

  • Extensometer  This is an Instrument for measuring the movement of vertical soil layers that are installed in boreholes or in landfilling. Which can measure the movement of soil at various depths There are many systems to choose from, including Magnets as a measurement (Magnetic Extensometer), a system that uses clamping rings as a measurement
    (Sondex System) and systems that use metal or fiber bars (Rod Extensometer)
          


2.3 Structural inclination measurement Instruments (Tilt Meter)   These are tools for measuring the tilt of buildings and structures. Such tools include:
 

  • Tilt meter   This is a tool used for measuring the inclination of buildings and structures which consists of a Tilt Plate, a Portable Tiltmeter, and a Readout Unit. A Portable Tiltmeter uses the principle of accelerated equilibrium force (Force balanced servo-accelerometer) to measure tilting by the accelerometer. It is mounted in a cylinder that is attached to a metal frame with a flat surface and is fixed in a secure position. The bottom surface of the plate is used for the Tilt Plates installed horizontally and the side surfaces of the plates are for the vertically mounted Tilt Plates. The Tilt Plates are attached to the structure at the specified position. Changes in the inclination of buildings and structures can be found by comparing the last reading (Current Reading) to the first reading (Initial Reading).

     

                  
     

  • Electro Level (EL Tilt Meter)  This is a tool used for measuring the inclination of buildings and structures using a sensor system with high accuracy it can measure changes in tilting as small as 0.00028 degrees. This tool can be installed easily using only one swivel bracket, which can mount the EL Tilt Meter to a wall or ceiling. Changes in the inclination of buildings and structures can be found by comparing the last reading (Current Reading) to the first reading (Initial Reading).
 
                


2.4 Crack measurement   These are tools to be used to track and measure cracks and crevices in buildings and structures. These include: 
 

  • Crack Gauge  This tool is used to measure the expansion and contraction of cracks. By measuring the pins embedded on 2 sides of the crack to measure the distance changes between the pins you can read the size expansion or contraction of the crack. These tools are able to measure up to 1 mm in accuracy when reading with a vernier.