GEOTECHNICAL INSTRUMENTATION FOR LANDSLIDE MONITORING
M. Melih Demirkan, Ph.D., P.E.
RELIABLE INSTRUMENTATION & DATA MONITORING SOLUTIONS GEOTECHNICAL | GEODETIC | STRUCTURAL | ENVIRONMENTAL
TYPICAL INSTRUMENTATION SCHEME – LANDSLIDE
• Magnitude • Direction • Rate • Depth WHY?
. WHY MONITORING? • OBSERVE ANY CHANGE • KNOW THE STATE OF THE SYSTEM • SAFETY AND PERFORMANCE . WHY VIBRATING WIRE? • DURABLE (MATERIAL, ASSEMBLY, CABLE, SEAL) • LONG TERM STABILITY –NO DRIFT • FREQUENCY OUTPUT - TRANSMIT OVER LONG DISTANCE • REAL TIME MONITORING
GROUNDWATER LEVELS
Vibrating wire piezometers, standpipe piezometers and automatic water level monitoring systems were installed around deep excavations-stations and shafts, adjacent to TBM bored tunnels to monitor change in groundwater pressure and level due to construction activities
VW piezometer model EPP-30V (top left), EPP-40V (right)
< Readout unit model EDI-51V
< Automatic Water Level Monitoring System DISPLACEMENT, DEFORMATION
. VIBRATING WIRE DISPLACEMENT TRANSDUCERS . LINEAR CRACK & JOINT METERS- ELECTRONIC & MECHANICAL . 3D CRACK METERS - ELECTRONIC & MECHANICAL
DISPLACEMENT SENSOR CRACK METER IN-PLACE INCLINOMETERS
Dasenbrock et. al. 2011 MPBX EXTENSOMETER
Multi (three) Point Borehole extensometers were installed above bored tunnel alignments to monitor subsurface ground settlement at anchor depths using digital depth micro meter. Reference plate at the head of the MPBX were also surveyed using precise levelling methods
MPBX model EDS-63-U/D and Digital Depth Micro meter DIGITAL INCLINOMETER
THE IN-HOUSE DEVELOPED SOFTWARE THRU MOBILE PHONE
DATALOGGER
COMPACT SDI-INTERFACE DATALOGGER WITH INTEGRAL GSM/GPRS MODEM AUTOMATED MONITORING SYSTEM
• AUTOMATED ROBOTIC TOTAL STATIONS USING TERRAMOVE SOFTWARE, TERRAMOVE CONTROL BOX. • HIGH MEASUREMENTS DENSITY, SIMULTANEOUS WIRELESS TRANSMISSION • CONTROLLED REMOTELY FROM ANYWHERE. DATABASE MANAGEMENT SYSTEMS
Easy access to meaningful instrumentation data Enhanced graphical and numerical presentation Instant alerts via SMS or email to authorized personnel Fast access to different sensor data on one screen Create diagrams from any combination of parameters Multiple authorized users at different locations Simultaneous interactions of users Low operational cost User friendly on tablets and smartphones
WEB BASED DATA MANAGEMENT
HTTP://122.15.209.75:50015/DEMOWDMS/WEBDATALOGIN
HTTPS://TERRAWEB.IQSOFT.XYZ/
MOVEMENT FROM INCLINOMETER DATA
Deformation (mm)
10.0 36.0 -10.0 -8.0 -6.0 -4.0 -2.0 0.0 2.0 4.0 6.0 8.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 32.0 34.0 38.0 40.0 42.0 44.0 46.0 48.0 50.0 52.0 54.0 6.5 5.5 4.5 3.5 2.5 1.5 0.5 -0.5
-1.5
) -2.5 -3.5
DMD -4.5 -5.5 -6.5 -7.5 -8.5
(m Elevation -9.5 -10.5 -11.5 -12.5 -13.5 -14.5 -15.5 -16.5 -17.5 -18.5 -19.5 -20.5 -21.5 -22.5 VERTICAL INCLINOMETER-02 COMBINED GRAPH-INCLINOMETER & PIEZOMETER thank you
RITE GEOSYSTEMS INC. 1653 McFarland Rd., Pittsburgh PA 15216 +1 (412) 745 8300 www.ritegeosystems.com