ASTM D6598-07
(Guide)Standard Guide for Installing and Operating Settlement Platforms for Monitoring Vertical Deformations
Standard Guide for Installing and Operating Settlement Platforms for Monitoring Vertical Deformations
SCOPE
1.1 This guide provides recommended designs and procedures for the fabrication, installation, operation, and reading of settlement platform to determine the magnitude and rate of foundation, fill settlements, or both generally under a fill or embankment load. Two types of settlement platforms are described - those be monitored by elevation surveys from an external bench mark and those that include an internal reference system supported on unyielding soil or rock beneath the compressible layer(s) of interest.
This guide 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 guide to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgement. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word "standard" in the title of this document means only that the document has been approved through the ASTM consensus process.
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Designation: D6598 – 07
Standard Guide for
Installing and Operating Settlement Platforms for Monitoring
1
Vertical Deformations
This standard is issued under the fixed designation D6598; 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* Used in Engineering Design and Construction
D5092 PracticeforDesignandInstallationofGroundWater
1.1 This guide provides recommended designs and proce-
Monitoring Wells
dures for the fabrication, installation, operation, and reading of
settlement platform to determine the magnitude and rate of
3. Terminology
foundation, fill settlements, or bothgenerally under a fill or
3.1 Definitions of Terms Specific to This Standard:
embankment load. Two types of settlement platforms are
3.1.1 settlement platform—a system consisting of a square
described – those be monitored by elevation surveys from an
base platform with an extendible riser pipe of known length
external bench mark and those that include an internal refer-
which is used to monitor vertical deformations at the elevation
ence system supported on unyielding soil or rock beneath the
of the base platform by survey measurements made of the top
compressible layer(s) of interest.
of the riser pipe.
1.2 This guide does not purport to address all of the safety
3.1.2 external and internal reference point system—with an
concerns, if any, associated with its use. It is the responsibility
external system, the amount of settlement is determined by
of the user of this guide to establish appropriate safety and
referencing the elevation of the settlement platform to an
health practices and determine the applicability of regulatory
outside elevation benchmark; with an internal system, the
limitations prior to use.
amount of settlement is determined by measuring the relative
1.3 This guide offers an organized collection of information
displacement of two co-axial riser pipes moving relative to
or a series of options and does not recommend a specific
each other, the outer riser pipe being attached to the base
course of action. This document cannot replace education or
platform and the inner riser pipe being fixed to an unyielding
experience and should be used in conjunction with professional
stratum.
judgement. Not all aspects of this guide may be applicable in
3.1.3 anchor—an anchor system that provides an internal
all circumstances. This ASTM standard is not intended to
fixed reference point below the base of the settlement platform
represent or replace the standard of care by which the
system.
adequacy of a given professional service must be judged, nor
3.1.4 extendible riser—a metal shaft or pipe which can be
should this document be applied without consideration of a
incrementally lengthened using sections of the same material
project’s many unique aspects. The word “standard” in the
and appropriate couplings as fill is placed and compacted to
title of this document means only that the document has been
ensure that the top of the riser remains above the level of the
approved through the ASTM consensus process.
surroundinggroundsurface.Dependingonwhetheranexternal
2. Referenced Documents or internal reference point is being used, there may be one or
2 two risers.
2.1 ASTM Standards:
3.1.5 isolation casing—a casing of a larger diameter than
D653 Terminology Relating to Soil, Rock, and Contained
the extendible risers is used in some installations to prevent
Fluids
down-drag of soil on the extendible riser that would otherwise
D3740 Practice for Minimum Requirements for Agencies
be in contact with the soil from placing additional load on the
Engaged in Testing and/or Inspection of Soil and Rock as
platform and thereby leading to overestimates of deformations.
3.1.6 For definitions of other terms used in this guide see
1
This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rock
Terminology D653.
and is the direct responsibility of Subcommittee D18.23 on Field Instrumentation.
Current edition approved May 1, 2007. Published June 2007. Originally
4. Summary of Standard Guide
approved in 2000. Last previous edition approved in 2000 as D6598–00. DOI:
10.1520/D6598-07. 4.1 The standard guide presents recommended designs for
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
settlement platforms along with procedures to install, operate
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and monitor them. The standard guide focuses on methods that
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears
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