Inclinometer casings play a crucial role in geotechnical monitoring by housing inclinometer probes and providing a stable reference frame for accurate measurements of ground movement.
They are usually made of ABS or aluminium.
Inclinometer casings are widely used to monitor unstable slopes, diaphragm walls, retaining walls, mines, tunnel excavations and dams.
The BRAIN inclinometer system is a device used to measure the displacement in ground or under structures by mean of the inclinometer prove. It is particularly useful in assessing the stability of slopes, embankments, retaining walls, and other structures that are susceptible to movements or deformations.
The BRAIN system and KLION data analysis software, provides an inclinometer report compliant with the ISO 18674-3 standard.
Piezometers are instruments used in geotechnical monitoring to measure and monitor pore water pressure within soil or rock formations for understanding the behaviour of groundwater and its impact on the stability of geotechnical structures and underground works, such as foundations, retaining walls, dams, slopes, tunnels and mines.
Resistive piezometers (model P235) are used for short-term monitoring and high-frequency measurements, ex. pumping tests; vibrating wire piezometers (model PK45 or PK20) are used when high reliability and long-term monitoring is required, ex. dam projects.
Pressure cells essentially consist of a pressure pad filled with deaerated oil, connected to a pressure transducer with a hydraulic tube. The size and shape of the pressure pad must be chosen according to the application, expected pressure, size of the structure and method of installation.
Pressure cells are commonly utilized during tunnel and embankment dams construction.
In tunnels, hydraulic pressure cells are required to monitor stresses in the concrete lining: radial pressure cells and tangential pressure cells, or contact soil/rock-concrete.
With this type of pressure cell, both local readings and remote monitoring are possible.
Vibrating wire strain gauges are widely used in structural and geotechnical monitoring to measure the strains and deformation of various components of a structure.
Common applications are: tunnel excavation, pile load tests, foundations, structural parts of bridges and buildings, and concrete dams.
Models of VW strain gauges are:.
1. Embedment VW strain gauges
2. Embedment VW strain gauges for deep applications
3. Arc-weldable VW strain gauges
4, Concrete surface strain gauges
5. Shotcrete VW strain gauges
6Spot-weldable strain gauges
All vibrating wire strain gauges, like all other Sisgeo VW instruments, have a built-in thermistor for temperature monitoring and, if necessary, temperature compensation.
Railway instrumentation plays a crucial role in monitoring and assessing the stability and performance of railway infrastructure. It helps detect potential issues, such as ground movement, settlement, or instability, allowing for timely maintenance and ensuring safe railway operations.
Sisgeo designs and manufactures various sensor models for track monitoring:
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Load cells play a critical role in assessing the performance, safety, and reliability of structures and geotechnical systems by measuring and monitoring loads and forces accurately.
Electric anchor load cells consist of a stainless-steel toroidal body sensed with electrical resistance strain gauges, in a Wheatstone bridge configuration, to ensure, together with the particular cell design, very low sensitivity to eccentric loads.
Anchor load cells of different sizes and measuring ranges are available to meet customer requirements.
Extensometers are instruments used in geotechnical monitoring to measure the change in length of a material along a specified direction.
MPBX multipoint borehole extensometers consists of an instrument head, up to 7 individual measuring rods of different lengths, each connected to a bottom anchor. Electrical or vibrating wire displacement transducers are installed in the head to enable remote monitoring.
The measuring rods are available in different material to meet project requirements (fibreglass, stainless steel or invar steel).
Extenso-inclinometer 3D are instruments used in geotechnical monitoring to measure the change in length and transverse displacement of a material along 3D especified directions.
DEX in-place extensometers consists of chain of in-place probes able to detect automatically the position of the magnetic rings. With a DEX column operated with an automatic data acquisition system, the customer will be provided with very accurate settlement/heave monitoring results.
DEX-S in place extenso-inclinometers incorporates a built-in biaxial inclinometer sensor so that a DEX-S chain is able to provide 3-D borehole readings.
The SISGEO DEX-S extenso-inclinometer is a unique solution for 3D-borehole monitoring
Crackmeters and joint meters are devices used in structural monitoring to measure cracks and joint movements in buildings, tunnels, bridges, dams, and other structures.
Electrical crackmeters and vibrating wire crackmeters are available for accurate and automatic monitoring. Offered with both potentiometer and vibrating wire sensor technology, they can also be installed with special supports in 2D or 3D configuration. They are IP68 protected, and so suitable for projects that request waterproofing (e.g. dams, piers, tunnels, etc.).
The instrument assembly includes sensor housing and target, both parts are equipped with screw anchors. Typically the anchors are bolted on the opposite sides of the joint (crack).
The displacement transducer housed in the sensor body is positioned across the joint/crack enabling to measure the changes in the distance between the anchors.
The Wire crackmeter is similar to the wire deformometers. It is used when distance between the points to monitor is larger than 10m and when a strong and rugged instrument is required. It is basically composed by a stainless steel instrument box that houses the sensor, a steel wire and a reference anchor. This kind of instrument is widely used to monitor landslides and large rifts.
WIRE CRACKMETER ALLOWS TO MONITOR THE CHANGES IN THE DISTANCE BETWEEN TWO ANCHOR POINTS LOCATED UP TO 30 M APART.
Typical applications include measurements of large displacement associated with landslides, monitoring of rock-masses, mansonry cracks and surveying of earth faults.
The wire crackmeter consists of a stainless steel transducer box which includes the rotary electronic sensor with a wire tensioning device having 2 meter stroke. Transducer box is supplied with a galvanised steel fixing plate. The target is an eyebolt expansion anchor.
The wire deformometers is a gauge able to detect relative movements between two points at a maximum distance of 10m connected with a stainless steel rope. The installation is very simple: install the instrument body on one point, extend the wire to the second point and fix it to the reference anchor.
WIRE DEFORMOMETERS ALLOWS TO MONITOR THE CHANGES IN THE DISTANCE BETWEEN TWO ANCHOR POINTS.
Typical applications include measurements of small cracks, convergence monitoring in tunnel and structural deformations.
The USB wire deformometer consist of an aluminium logger and transducer box with a tensioned steel wire having 80mm stroke.
Electrical deformometer, available with both potentiometer or vibrating wire transducer, is composed by a stainless steel body mounted on fixing plate. A kevlar rope realizes the connection between the transducer and the target
Vibrating wire piezometers are used to monitor pore-water pressure in soils. They are typically sealed in boreholes but can also be embedded in fills, or suspended in a well. Typical applications include evaluating slope stability, dewatering and drainage schemes, overpressure in silt and clay soils, permeability and hydraulic gradients in dams, and also ground water levels. They can also be used to monitor up-lift pressures in gravity dams. Main features: • Long-term stability • Hermetically sealed • Built-in temperature sensor • Built-in surge protection (overvoltage) • HAE and LAE filters available • Long working life and reliability
Vibrating wire strain gauges provide measurements of strain in steel or concrete structures. The measurements are used to calculate structural loads. Our models:
VK4000VS00 - WELDABLE STRAIN GAUGE
VK4000VSC0 - CONCRETE SURFACE STRAIN GAUGE
VK4200VC00 / 0VK4200VCHP EMBEDMENT STRAIN GAUGES VK4000SM00 SHOTCRETE EMBEDMENT STRAIN GAUGE FEATURES: - Reliable long term performance - Suitable for demanding environments - Totally waterproof - Built-in temperature sensor - Aged thermally to minimize long-term drift
APPLICATIONS - Piles and mass concrete - Concrete structures, beams and columns - Concrete foundations and diaphragm walls - Tunnel segments - Steel structures, pipes and arch supports - Gravity and arch dams - RCC dams - Bridges and viaducts
B.R.A.IN (Borehole Readout Array for INclinometers) inclinometer system is mainly composed by the BRAIN APP (compatible with Android and iOS), digital inclinometer probe (vertical and/or horizontal), and bluetooth reel with control cable.
The intuitive BRAIN APP allows the user to manage the inclinometer and spiral meter surveys and immediatelly share the readings with the most popular APP installed on the device (i.e. email, Dropbox, Whatsapp, Google DRIVE, OneDrive, iCloud Drive etc.) Survey could be then imported in KLION software for data analysis and customizable reports.
MAIN FEATURES • Rugged low noise sensor • High precision readings • Available with vertical or horizontal digital MEMS probe • Available with 500 and 1000mm probe gauge length • Choice of heavy-duty or light-weight cable • APP available in the APP store (Android and iOS)
Electrical resistance anchor load cell consists of a ring-shaped stainless steel body which incorporates from 8 to 16 electrical resistance strain gauges in full bridge configuration.
Typical application includes performance testing of anchor systems in tunnelling or deep excavations.
Main features: • Retaining walls • Diaphragm walls • Deep excavations • Landslides • Tunneling • Tie-backs, struts and rock bolts
Our splash proof IP67 tiltmeter, with box dimensions 99x55x49mm, is equipped with one M12 connector for both analogue and digital sensors. The cable model 0WE106IP0ZH is suitable for analogue and digital versions, as well as for the uniaxial and biaxial. It ensures high performances and accuracy together with very low thermal dependency. Thanks to its compact design, it is easy to install in a stand-alone version and with its adjustable plate engineered for small ranges. Its main applications are: • SHM (Structural Health Monitoring) • Building safety along adjacent excavations • Diaphragms and retaining walls • Historical buildings • Decks and bridge piers
Landslides are monitored following different parameters like landslide type, layers type, displacement speed, etc... The most utilized geotechnical instruments for this purpose are the inclinometer casings (or inclinometer tubes) able to control horizontal movement into the ground. Inclinometer casing can be read with BRAIN portable inclinometer system. Many other geotechnical instruments are available for slope monitoring purposes, such as piezometers, crackmeters, wire extensometers, MPBX MultiPoint Borehole extensometers, anchor load cells, tiltmeters, etc...
Bridge monitoring should be taken in consideration during design & construction or for increasing the safety and the health of the structures.
SISGEO geotechnical and structural instrumentation is designed to monitor many factors such as piles/pillars inclination and settlement, deck movements, relative movements between two structural parts, movement of bearings, tendons loads, etc…
Some instruments can be installed also on bridges already finished but without any monitoring system and with some health problems:
The presentation show 4 example of monitoring starting from different bridge type: arch bridges, truss metal bridge, cable-stayed bridges and viaducts.
FLX-RAIL® wireless instrument is the first instrument to provide continuous reliable data to monitor railway track both in static (without train load) and dynamic underload conditions (during train passage).
Developed in collaboration with SNCF Réseau and RATP Infrastructures, the FLX-RAIL® is able to monitor the main railway track geometry parameters to participate to rail traffic safety and availability.
The autonomous wireless version is now available and its installation has never been simpler: no tools, no glue, no drilling operation are necessary! With the FLX-RAIL®, rather than only punctual measurements, the continuous evolution against time of parameters such as underload cant and twist are now available.
The railway track maintenance operations are optimized with real-time access to reliable track geometry parameters.
FLX-RAIL® LoRa is also certified according to the demanding railway norm EN 50125-3 clause 4.13 to resist to shocks and vibrations.
Find out more on https://sisrail.sisgeo.com/en/railway...
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