Applications
Inclinometers
are used to monitor subsurface movements and deformations. Typical applications
include:
Detecting
zones of movement and establish whether movement is constant, accelerating, or
responding to remedial measures.
Checking
that deformations are within design limits, that struts and anchors are
performing as expected, and that adjacent buildings are not affected by ground
movements.
Verifying
stability of dams, dam abutments, and upstream slopes during and after
impoundment.
Monitoring
settlement profiles of embankments, foundations, and other structures
(horizontal inclinometer).
Inclinometer
Casing
An
inclinometer system has two components: (1) inclinometer casing and (2) an
inclinometer measurement system.
Inclinometer
casing provides access for subsurface measurements. Grooves inside the casing
control the orientation of the inclinometer sensor and provide a uniform
surface for measurements.
Inclinometer
casing is usually installed in a borehole. It can also be embedded in fill,
buried in a trench (horizontal inclinometers), cast into concrete, or attached
to a structure.
Portable
Measurement Systems
Portable
measurement systems include a probe, cable, and readout. Portable systems are
economical because they can be carried from site to site. They are accurate
because the entire length of the casing is measured twice in each survey.
The
first survey establishes the initial profile of the casing. Subsequent surveys
are compared to the initial. Changes in the profile indicate that movement has
occurred.
Slope
Indicator offers the Digitilt Classic System, which has been the world standard
in precision and reliability for many years, and the Digitilt AT System, which
takes advantage of newer technologies.
Inclinometers
generate more data than most other types of sensors. For example, an ordinary
survey may generate several hundred data points. Over time, tens of thousands
of data points must be reduced, compared, plotted, and archived. Slope
Indicator's DigiPro2 Software is designed to speed these tasks.
In-Place
Measurement Systems
In-place
measurement systems are installed when continuous monitoring is required for
construction control or safety.
The
in-place system consist of one or more dedicated sensors connected to a
data
logger. The sensors are positioned to span the zones where deformation is
likely to occur.
In-place
inclinometer systems generate even more data than portable systems, and often
the data must be processed and distributed immediately. Slope Indicator's Atlas
web-based monitoring performs this task, automatically processing the readings,
checking for alarms, and generating graphs and reports.
Spiral
Checking
A
spiral sensor provides readings that can be used to correct inclinometer data
obtained from spiraled casing. Spiral surveys are recommended when the
installation is very deep, when inclinometer readings indicate movement in
unlikely directions, or when difficulties were experienced during installation
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