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Transcript of Dam Safety Insts.inhydro
7/28/2019 Dam Safety Insts.inhydro
http://slidepdf.com/reader/full/dam-safety-instsinhydro 1/214
DAM SAFETYINSTRUMENTATION IN HYDRO
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CRACK & J OINT METERS
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J OINT METER
Application
Jointmeter is designed for use acrossconstruction joint such as those between
adjacent blocks in a concrete dam. It is normally embedded across the joint to
monitor the expansion or contraction of the
joint. The use of internal universal joint allows for a
degree of shearing motion.
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(A )J OINT METER
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( B ) STRAND METER
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STRAND METER
APPLICATION :-
Strandmeter is designed to measure strains intendons and steel cable.
Two clamps at each end of the strandmeter
hold it firmly on to the cable . Various size clamps are available
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CRACK & J OINT METER
APPLICATION:-
Crackmeter is intended to measure movementacross surface crack and joints.
It is installed by grouting ,or bonding two
threaded anchors (with ball joint) on oppositesides of the crack and than attaching the endsof the gage to the anchors.
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(C ) CRACK &J OINT METER
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MINIATURE CRACK METER
APPLICATION:-
Miniature crackmeter intended to measuredisplacements across surface crack and
joints.
It has been specially designed for applications
where access is limited where monitoringinstrumentation is to be as unobtrusive aspossible.
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(D ) MINIATURE CRACK METER
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CONVERGENCE METER
APPLICATION:-
CONVERGENCE METER IS USED TO MONITORCLSURES IN UNDERGROUND EXCAVATION ,
TUNNELS , ETC.
IT IS COMPRISED OF A SPRING TENSIONED TRANSDUCER, TURNBUCKLE, CONNECTING ROD (STAINLESS STEEL,FIBERGLASS OR GRAPHITE) ROD
CLAMP, AND A PAIR OF STAINLESS STEEL EYEBOLTS.
TRANSDUCER LENGTH:- 360 TO 1260 MM
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(E ) CONVERGENCE METER
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LONG RANG DISPLACEMENTMETER
APPLICATION:-
Is ideally suited for the measurement of largedisplacements associated with landslides.
Can also be used for monitoring themovement of boulder, snow etc, on unstableslopes.
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(F) LONG RANG DISPLACEMENTMETER
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SOIL STRAINMETER WITHFLANGED ENDS
APPLICATION:-
Is designed to measure longitudinal deformation in
dam and embankments.
It can also be grouted or held in place by hydraulicanchors to measure deformations in boreholes (
over the gage length ).
Gage length from 0.5 to 100 meters .
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(G) SOIL STRAINMETER WITHFLANGED ENDS
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DISPLACEMENT TRANSDUCER
APPLICATION:-
Is provides remote readout capabilityfor borehole
extensometers. They are particularly useful where other types of
vibrating wire sensors are used and / or forinstallations where long runs are required.
Can also be installed between conjunction with therequisite length connecting rod, to provide apermanent, in place incremental extensometer.
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(H ) DISPLACEMENT TRANSDUCER
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EXTENSOMETERS
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Flexible rod extensometer
Application:-
Flexible extensometer uses continuous-specified lengths of fiberglass rods (in sideprotective tubing), cut to a requirement.
The extensometer is lightweight, making iteasier to handle for installation .
Maximum length :- 100 meters.
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(A) FLEXIBLE RODEXTENSOMETER
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RETRIEVABLE EXTENSOMETER
APPLICATION:-
Is desingned to measure deformations in boreholes
in rock, concrete, and other construction materials.
The can be used in pile load test studies, plate
jacking tests and virtually any application where ahole can be drilled or a pipe can be cast in to thestructure being studied.
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(B) RETRIEVABLEEXTENSOMETER
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DIFFERENT TYPE OF ANCHORS
APPLICATION:-
A) Borros type hydraulic anchor:- For use in soft
soils and clays, especially in augered boreholes.
B) Groutable anchor:- The preferred anchor for use
in downward-directed boreholes. The preassembledextensometer is installed in the borehole and is thenfilled with cement grout.
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Cont.
C) Hydraulic anchor:- For use in roughboreholes in rock and soft ground,especiallyif dilations and contractions of the borehole
are anticipated .
D) Snap-ring anchor :- For use in hard or
competent rock where smooth uniformboreholes can be drilled. The simplicity of thedesign allows for quick and easy installation.
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(C) DIFFERENT TYPES OFANCHORS
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HEAVE/SETTLEMENT POINTS
APPLICATION:-
Is to measure vertical movements in
foundation soils during and subsequent toconstruction.
The heave/settlement point consists of a three – prong anchor, ¼ inch standard inner pipe,and a 1inch standard outer pipe.
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(D) HEAVE/SETTLEMENT POINTS
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TYPES OF MEASUREMENTS
A) Digital depth micrometer:- Readout of borehole extensometers is made on a digitalcounter after manual adjustment of the
thimble.
B) Dail indicator :- Used for quick and easy
readout of borehole extensometers. Accuracyis 0.01 mm, standard range is 50 mm.
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Cont.
C) Linear potentiometer:- Utilizes a sturdy 6.5 mmdiameter rod which protrudes from both ends as theactuating shaft.This also use for mechanical check
on the readings.
D) VW Displacement Transducer:- Is providesremote readout for extensometers.They areparticularly useful where other types of VW sensorsare used and where long cable runs are required.
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(E) TYPES OF MEASUREMENTS
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TAPE EXTENSOMETER
APPLICATION:-
Is designed to measure small changes in the distancebetween opposite walls or between the roof and floor of
excavations, tunnels, or mine openings.
It can also used to monitor deformation in structures andsupports and to measure movements of unstable slopes.
Readout is provided electronically via a front panel LCD.
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(F) TAPE EXTENSOMETER
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MAGNETIC EXTENSOMETER
APPLICATION:-
Is designed to measure settlement or heave of softground under the influence of loading or unloading
due to the construction of embankments ,fills,buildings, foundations, and structures.
A probe is lowered inside a telescoping guide tube to
detect and measure the position of magneticanchors located around the guide tube at variousdepths along the borehole or with in the fill.
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(G) MAGNETIC EXTENSOMETER
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INCLINOMETERS
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INCLINOMETER PROBE
APPLICATION:-
Is used in conjunction with inclinometer casing for the measurement of lateral earth movements which might occur in unstable slopes, landslides, dam and roadway embankments, and landfills.
They are also used to measure deflections in the walls of excavation,shafts, tunnels, and in caissons , piles and sheet piling.
The probe consists of a waterproof stainless steel housing containing twoforce-balanced servo-accelerometers with an output of five volts at 30
degree.
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INCLINOMETER PROBE
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SPIRAL INDICATOR
APPLICATION:-
Is uses a flex-gate magnetometer to measure anyspiraling of inclinometer casing.
The 6005 is lowered into the casing on the end of standard inclinometer cable connected to the GK-603 inclinometer readout box.
The instrument provides a direct reading of thecasing grooves at any point along the casing.
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(A) SPIRAL INDICATOR
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HORIZONTAL INCLINOMETER
APPLICATION:-
Horizontal inclinometer is measures differential
settlement along the length of the casing.
Standard range ;- + - 53 DEGREE.
Casing size I.D 61 TO 89 MM. Temperature range :- 0 degree to + 50 degree.
( )
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(B) HORIZONTALINCLINOMETER PROBE
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INCLINOMETER DATA
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BOREHOLE PRESSURE CELLSMEASUREMENTS
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BOREHOLE PRESSURE CELL
APPLICATION:-
Is used to measure rock stress changes and isdesigned to the grouted inside a borehole.
The BPC is manufactured from two steel platesweled together around their periphery.
The plates are deformed into a” dog bone’ configuration so that they can be expanded easilywithout damage to the welds.
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Cont.
Hydraulic oil fills the space between the twoplates and high-pressure stainless steel tubeconnects the plates to a stainless steelpressure gage and/ or a pressure transducer.
Size of borehole:- 57mm.
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A. BOREHOLE PRESSURE CELL
VIBRATING WIRE BOREHOLE
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VIBRATING WIRE BOREHOLESTRESSMETERS
APPLICATION:-
Are designed to measure stress changes in rock and
can be installed in boreholes up to 100 feet deep.
The stressmeter consists of a high strength steel
proving ring wedged tightly across one diameterinside a borehole and a vibrating wire tensionedacross the other diameter inside the stressmeter.
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Cont.
Changes in rock stress cause a relatedchange in the resonant frequency of vibrationof the tensioned wire providing output whichis read by the readout box.
B VIBRATING WIRE BOREHOLE
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B. VIBRATING WIRE BOREHOLESTRESSMETER
VIBRATING WIRE BIAXIAL
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VIBRATING WIRE BIAXIALSTRESSMETER
APPLICATION:-
Is designed to measure compressive stress changes in rock,salt, concrete or ice.
Three or six vibrating wire sensors oriented at 60 degreeinternals allow the principal stress changes to be measuredin the plane perpendicular to the stressmeter axis.
The stressmeter consists of a high strength steel cylinderwhich is grouted in to a BX 60mm size borehole.
C VIBRATING WIRE BIAXIAL
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C. VIBRATING WIRE BIAXIALSTRESSMETER
VIBRATING WIRE SISC
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VIBRATING WIRE SISCBOREHOLE STRESSMETER
APPLICATION:-
The SISC is pre-loaded by wedging it into a largesize diamond drill hole using an integral screw
mechanism or hydraulic piston and can be set tomeasure both tensile and/ or compression stresschanges.
It has been used successfully in 152 mm diameterovercoring holes to measure Aggregate/AlkaliReactions in concrete dams.
C VIBRATING WIRE SISC
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C. VIBRATING WIRE SISCBOREHOLE STRESSMETER
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CONCRETE STRESSMETER
APPLICATION:-
The vibrating wire load cell measures the
load imposed on the inner concrete cylinderby stresses in the surrounding concrete.
This load , when divided by the crosssectional area of the inner cylinder, gives thestress in the surrounding concrete.
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D. CONCRETE STRESSMETER
BOREHOLE DEFORMATION
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BOREHOLE DEFORMATION
GAGE
APPLICATION:-
Used to measure in situ rock stresses using
the overcoring technique in rock that iscompetent and elastic.
It is also useful for determining the inherentstability of pit slopes, foundation excavations,mine pillars and abutments.
E BOREHOLE DEFORMATION
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E. BOREHOLE DEFORMATIONGAGE
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SETTLEMENT SYSTEM
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SETTLEMENT SYSTEM
APPLICATION:-
Is designed for the remote measurement of surface orsubsurface settlement in fills, surchanges, dams,
embankments, etc.
A borehole is drilled which allows a pressure transducer tobe anchored to solid ground below the area of settlement.
A fluid filled tube extends upward connecting the transducerto a reservoir which is located in the moving strata or fill.
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Cont.
The measurement of fluid press indicates theelevation difference between the sensor and thereservoir.
This design eliminates the need for long liquid filledtubes.
Standard Ranges :- 7,17,35 meters.
Temperature Ranges :- _20 degree to + 80 degree.
Length × diameter :- 305×60 mm (reservoir), 191×35 mm (sensor)
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A .SETTLEMENT SYSTEM.
PRESSURE TRANSDUCER
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ATTACHED TO A SETTLEMENT
PLATE APPLICATION:-
The settlement plate located in the settling ground.
The sensor is connecting , via two fluid filled tubes extendinglaterally, to a reservoir located on firm ground away from thearea of anticipated movement.
Fluid pressure within the tubes is sensed by the transducerwhich provides a measure of the elevation difference betweenthe sensor and the reservoir.
The tubes are flush-able.
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Cont.
Standard Ranges:- 7, 17 meter.
Temperature Ranges :- -20 degree to +80degree.
Length× diameter :- 152× 51 mm(reservoir), 191× 35 mm (sensor)
B. PRESSURE TRANSDUCER
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ATTACHED TO A SETTLEMENT
PLATE
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SETTLEMENT PROFILER
APPLICATION:-
Consists of a pressure transducer inside a torpedo which isconnected by a long liquid filled tube to a liquid reservoir.
The torpedo is pulled through a pipe buried in a fill,surcharge, embankment, etc.
The transducer gives a measure of the elevation profile of the
pipe relative to the reservoir located on stable ground.
The liquid tube is stored on a reel.
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C. SETTLEMENT PROFILER
HIGH SENSITIVITY
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HIGH SENSITIVITYSETTLEMENT SYSTEM
APPLICATION:-
Consists of a series of vessels containing liquid levelsensors interconnected by a liquid filled tube.
A reference vessel is positioned at a stable benchmark location with additional vessels positioned atdifferent location at approximately the sameelevation.
The differential settlement or heave between anyvessel and the reference vessel results in anapparent rise or fall of the liquid level in that vessel.
D HIGH SENSITIVITY
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D. HIGH SENSITIVITYSETTLEMENT SYSTEM
PRECISION SETTLEMENT
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PRECISION SETTLEMENTMONITORING SYSTEM
APPLICATION:-
System was designed to measure differentialsettlements with a very high degree of accuracy and resolution, making it suitablefor applications of a highly critical naturewhere the expected settlement are small.
E PRECISION SETTLEMENT
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E. PRECISION SETTLEMENTMONITORING SYSTEM
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STRAIN GAGE
MEASUREMENT
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STRAIN GAGE
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B. FIBER OPTIC STARIN GAGE
C DYNAMIC STARIN
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C. DYNAMIC STARIN TRANSDUCER
S G G
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D. STRAIN GAGE
E MODIFIED STRAIN GAGE
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E. MODIFIED STRAIN GAGE
F STRAIN GAGES
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F. STRAIN GAGES
G HIGH TEMPERATURE
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G. HIGH TEMPERATUREEMBEDMENT STRAIN GAGE
H REBAR STRAINMETER
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H. REBAR STRAINMETER
I. FIBER OPTIC REBAR
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I. FIBER OPTIC REBAR
STRAINMETER
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EARTH PRESSURE CELLS
A EARTH PRESSURE CELL
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A. EARTH PRESSURE CELL
B ANOTHER PRESSURE CELL
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B. ANOTHER PRESSURE CELL
C J ACKOUT PRESSURE CELL
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C. J ACKOUT PRESSURE CELL
D. J ACKOUT PRESSURE CELL
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D. J ACKOUT PRESSURE CELLHYDRAULIC
E INTERGRAL PIEZOMETER
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E. INTERGRAL PIEZOMETER
F. NATM STYLE SHOTCRETE
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STRESS CELLS
G LOAD CELL
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G. LOAD CELL
H. VIBRATING WIRE STRAIN
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GAGE
I. VIBRATING WIRE
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TRANSDUCER
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DATALOGGERS
A. SINGLE CHANNEL
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DATALOGGER
B. MULTI CHANNEL
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DATALOGGER
C 16 CHANNEL DATA LOGGER
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C. 16 CHANNEL DATA LOGGER
D DATA COLLECTION
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D. DATA COLLECTION
E MEASUREMENT & CONTROL
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E. MEASUREMENT & CONTROL
F. INTERFACE TO READ
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VIBRATING WIRE SENSOR
G MULTIPLEXER
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G. MULTIPLEXER
H DATA ACQUISITION
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H. DATA ACQUISITION
I DATA STORAGE
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I . DATA STORAGE
J . VIBRATING WIRE TO ANALOG
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CONVERTER
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TUNNEL MONITORING
INSTRUMENTATION
HYDRO TUNNEL
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HYDRO TUNNEL
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INSTALLATION OF PROBES
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INSTALLATION OF PROBES.
1. SINGLE CHANNEL DATA
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LOGGERS
2STANDARD PIEZOMETER
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2 STANDARD PIEZOMETER.
3A ROD EXTENSOMETER
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3A. ROD EXTENSOMETER.
3B .FLEXIBLE ROD
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EXTENSOMETER.
3C EXTENSOMETER HEAD
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3C. EXTENSOMETER HEAD.
4 LOAD CELLS
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4. LOAD CELLS.
5. NATM STYLE SHOTCRETES SS C S
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STRESS CELLS.
6. HIGH TEMPERATUREEMBEDMENT STRAIN GAGES
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EMBEDMENT STRAIN GAGES.
7. INSTRUMENTED ROCKBOLTS
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7. INSTRUMENTED ROCKBOLTS
8. VIBRATING WIRE TILTMETER.
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8. VIBRATING WIRE TILTMETER.
9. CRACK METER.
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9. CRACK METER.
10. DATA LOGGER.
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10. DATA LOGGER.
11. VIBRATING WIRE IN PLACEINCLINOMETER
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INCLINOMETER
12. TAPE EXTENSOMETER
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12. TAPE EXTENSOMETER
13. CONGERGENCE METERS.
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13. CONGERGENCE METERS.
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INSTRUMENTATION USED IN A
CONCRETE DAM MONITORINGAPPLICAYION.
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INSTALLATION OF PROBES.
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S O O O S
1. VIBRATING WIRE IN PLACEINCLINOMETER
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INCLINOMETER
2. MULTI-POINT RODEXTENSOMETER
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EXTENSOMETER.
3. PENDULUM SYSTEM.
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4. DATA LOGGER
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5. STANDARD PIEZOMETER.
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6. LOAD CELLS.
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7. VIBRATING WIRE TILTMETER
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8. CRACK METERS
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9. EMBEDMENT J OINT METER.
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10. VIBRATING WIRETEMPRRATURE SENSOR
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TEMPRRATURE SENSOR.
11. CONCRETE EMBEDMENTSTRAIN GAGES
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STRAIN GAGES
12. EARTH PRESSURE CELLS.
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INSTRUMENTATION USED IN
AN EARTH DAM MONITORINGAPPLICATION.
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INSTALLATION OF PROBS
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1.SOIL STARIN METERS
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2. SETTLEMENT SENSORS
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3. HEAVY DUTY PIEZOMETER
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4. TEMPERATURE GAGES
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5. EARTH PRESSURE CELLS.
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6. PIEZOMETER
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7. IN PLACE INCLINOMETER
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8. INCLINOMETER PROBES
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9. PORTABLE READOUT BOXES
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10. MULTIPLEXER
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11. MULTI CHANNELDATALOGGER
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DATALOGGER
12. SEAPAGE MONITOR
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INSTRUMENTATION USED IN
AN EXCAVATIONMONITURING APPLICATION.
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INSTALLATION OF PROBS.
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1. SINGLE-CHANNEL DATALOGGERS
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LOGGERS
2.PIEZOMETER
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3. IN PLACE INCLINOMETER
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4. LOAD CELLS.
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5. STRAIN GAGE
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6. EXTENSOMETER
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7. TILTMETER
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8. CRACKMETERS.
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9. MULTI CHANNEL DATALOGGERS
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10. PORTABLE INCLINOMETER
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11. J ACKOUT PRESSURE CELLHYDRAULIC
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12. SISTER BARS
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INSTRUMENTATIONUSED IN AN PILESMONITORINGAPPLICATION.
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INSTALLATION OF PROBES.
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1. DISPLACEMENT TRANSDUCER
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2. LOAD CELLS.
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3. MULTI CHANNEL DATALOGGERS.
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4. STRAIN GAGE
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5. RETRIEVABLEEXTENSOMETER
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6. IN PLACE INCLINOMETER
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7. SISTER BARS
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8. TELLTALES.
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WIRE LESS COMMUNICATION
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INSTALLATION TECHNIQUES OF WIRELESS TRANSMITTERS ON SITE INHYDRO POWER PLANT.
INSTALLATION OF SENSOR
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WIRELESS COMMUNICATION
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Scheduled & random Satellite Transmission from the field to your
desktop
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desktop.
FEATURES
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Integrating Sutron”s Xpert & SAT link in to existing Vibrating wire
systemusingSutronsystemsoftware.
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system using Sutron system software.
Net work of Individule Monitoringsites reporting to goes polling station.
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APPLICATIONS
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Tsunami Detection & Warning Tidal and Port Systems
Stream Gauging
Reservoir Monitoring
Stand-Alone Precipitation Stations (see photo)
Hydro-Met Stations
Agricultural Weather Stations
Synoptic & Climatic Weather Stations
Ground Water Monitoring
INCLINOMETER
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GROUND LEVEL MEASUREMENT
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IMMERSION TYPE LEVEL TRANSMITTER
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VIBRATING WIRE PIEZOMETER
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CRACK & J OINT METER
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MECHANICAL BORE WIREEXTENSOMETER
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WATER LEVEL METER.
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