How does a borehole extensometer work?
What is a Borehole Extensometer? An extensometer is a measuring device designed to measure changes in the length of a specific object. When mounted in a fixed position relative to a bank of soil or a rock face, extensometers are capable of measuring displacement (movement) with a high degree of accuracy.
How does Rod extensometer work?
The rod extensometer consists of a reference head, anchors, rods and protective pipe. Each rod spans between the reference head and the anchor. The displacement between these two points, indicated by the rod, is measured at the reference head.
What is multi point borehole extensometer?
Multipoint Borehole Extensometer is a geotechnical instrument designed to assist civil engineers and geologists in the estimation of deformation of rock mass and adjacent or surrounding soil.
How does a contact extensometer work?
Contact extensometers test the deformation by directly placing a physical object onto the sample such as a knife-edge. Non-contact extensometers use cameras and light to determine the deformational parameters without physically touching the sample.
What does extensometer mean?
Definition of extensometer : an instrument for measuring minute deformations of test specimens caused by tension, compression, bending, or twisting.
What is magnetic extensometer?
The Soil Instruments Magnetic Extensometer is used to monitor soil or rock settlement and heave in excavations, foundations, dams, and embankments, tunnels, shafts and sheet piles. Data from the extensometer indicate the depths at which settlement has occurred as well as the total amount of settlement.
What is extensometer system?
An extensometer is a device that is used to measure changes in the length of an object. It is useful for stress-strain measurements and tensile tests. Its name comes from “extension-meter”.
What is a borehole extensometer?
The borehole extensometer is an important instrument especially in the investigation of underground cavities & landslides. The Model EDS-70V borehole extensometer incorporates a vibrating wire transducer for measurement of displacement.
What is the eds-71v electrical borehole extensometer used for?
The Encardio-Rite Model EDS-71V electrical borehole extensometer is a precision instrument designed to help civil engineers and geologists in the measurement of deformation of rock mass and adjacent or surrounding soil.
How does a soil extensometer work?
The soil extensometer uses a vibrating wire sensor for monitoring displacement. The system consists of a sensor assembly with flanges that are mounted with adaptors, adjustment unit, sockets and extension rods between two anchors to monitor the horizontal movement of surrounding soil.
How do you attach a safety line to an extensometer?
8 ” extensometer rod into the bottom anchor, which has an eye bolt at the bottom, to attach a safety line. Apply a small amount of Loctite #242 to the threads.