Standard Test Method for Monitoring Ground Movement Using Probe-Type Inclinometers

SIGNIFICANCE AND USE
An inclinometer is a device for measuring deformation normal to the axis of a pipe by passing a probe along the pipe and measuring the inclination of the probe with respect to the line of gravity. Measurements are converted to distances using trigonometric functions. Distances are summed to find the position of the pipe. Successive measurements give differences in position of the pipe and indicate deformation normal to the axis of the pipe. In most cases the pipe is installed in a near-vertical hole. Measurements indicate subsurface horizontal deformation. In some cases the pipe is installed horizontally and the measurements indicate vertical deformation.
Inclinometers are also called slope inclinometers or slope indicators. Typical applications include measuring the rate of landslide movement and locating the zone of shearing, monitoring the magnitude and rate of horizontal movements for embankments and excavations, monitoring the settlement and lateral spread beneath tanks and embankments, and monitoring the deflection of bulkheads, piles or structural walls.
SCOPE
1.1 This test method covers the use of inclinometers to monitor the internal movement of ground. The test method covers types of instruments, installation procedures, operating procedures and maintenance requirements. It also provides formulae for data reduction.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate health and safety practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Oct-2005
Technical Committee
Current Stage
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ASTM D6230-98(2005) - Standard Test Method for Monitoring Ground Movement Using Probe-Type Inclinometers
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6230 − 98(Reapproved 2005)
Standard Test Method for
Monitoring Ground Movement Using Probe-Type
1
Inclinometers
This standard is issued under the fixed designation D6230; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope axis of the pipe. In most cases the pipe is installed in a
near-vertical hole. Measurements indicate subsurface horizon-
1.1 This test method covers the use of inclinometers to
tal deformation. In some cases the pipe is installed horizontally
monitor the internal movement of ground. The test method
and the measurements indicate vertical deformation.
covers types of instruments, installation procedures, operating
procedures and maintenance requirements. It also provides 3.2 Inclinometers are also called slope inclinometers or
formulae for data reduction. slope indicators. Typical applications include measuring the
rate of landslide movement and locating the zone of shearing,
1.2 The values stated in SI units are to be regarded as the
monitoring the magnitude and rate of horizontal movements
standard. The inch-pound units given in parentheses are for
for embankments and excavations, monitoring the settlement
information only.
and lateral spread beneath tanks and embankments, and moni-
1.3 This standard does not purport to address all of the
toring the deflection of bulkheads, piles or structural walls.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Apparatus
priate health and safety practices and determine the applica-
4.1 The probe type inclinometer uses sensors inside a probe
bility of regulatory limitations prior to use.
to indicate the orientation of the probe relative to the pull of
gravity. The complete system consists of:
2. Referenced Documents
4.1.1 A permanently installed pipe, called casing, with test
2
2.1 ASTM Standards:
method grooves. The casing is made of plastic, aluminum
D653 Terminology Relating to Soil, Rock, and Contained
alloy, or fiberglass.
Fluids
4.1.2 The Probe—Most probes use force balance acceler-
D4622 Test Method for Rock Mass Monitoring Using Incli-
ometers which give a voltage output that is proportional to
3
nometers (Discontinued 2000) (Withdrawn 2000)
inclination of the probe. Biaxial probes contain two sensors
oriented 90° apart to permit readings in orthogonal directions
3. Significance and Use
at the same time.
3.1 An inclinometer is a device for measuring deformation
4.1.3 A portable readout unit with power supply for the
normal to the axis of a pipe by passing a probe along the pipe
sensors and display to indicate probe inclination. The readout
and measuring the inclination of the probe with respect to the
unit may have internal memory to record data.
line of gravity. Measurements are converted to distances using
4.1.4 An electrical cable connecting the probe and readout
trigonometric functions. Distances are summed to find the
unit with distance markings. Fig. 1 shows a typical set of
position of the pipe. Successive measurements give differences
components.
in position of the pipe and indicate deformation normal to the
5. Procedure
5.1 Installation of Casing in a Borehole:
1
This test method is under the jurisdiction ofASTM Committee D18 on Soil and
5.1.1 Select casing materials that are compatible with the
Rock and is the direct responsibility of Subcommittee D18.23 on Field Instrumen-
tation.
environmental conditions at the installation. Select casing size
Current edition approved Nov. 1, 2005. Published December 2005. Originally
consistent with the specific measurement requirements and
approved in 1998. Last previous edition approved in 1998 as D6230 – 98. DOI:
conditions for the job. Store casing materials in a safe, secure
10.1520/D6230-98R05.
2
place to prevent damage. Sunlight may damage plastic casing.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
HighandlowpHmaydamagemetalcasing.Notethataspecial
Standards volume information, refer to the standard’s Document Summary page on
probe may be required for non-vertical boreholes.
the ASTM website.
3
5.1.2 Assemble all components required for the casing,
The last approved version of this historical standard is referenced on
www.astm.org. including casing, joints, connectors, and end cap. Examine
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D6230 − 98 (2005)
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