BS EN ISO 18674-4:2020
$198.66
Geotechnical investigation and testing. Geotechnical monitoring by field instrumentation – Measurement of pore water pressure: Piezometers
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 66 |
This document specifies the measurement of pore water pressures and piezometric levels in saturated ground by means of piezometers installed for geotechnical monitoring. General rules of performance monitoring of the ground, of structures interacting with the ground, of geotechnical fills and of geotechnical works are presented in ISO 18674-1.
If applied in conjunction with ISO 18674-5, the procedures described in this document allow the determination of effective stresses acting in the ground.
This document is applicable to:
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monitoring of water pressures acting on and in geotechnical structures (e.g. quay walls, dikes, excavation walls, foundations, dams, tunnels, slopes, embankments, etc.);
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monitoring of consolidation processes of soil and fill (e.g. beneath foundations and in embankments);
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evaluating stability and serviceability of geotechnical structures;
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checking geotechnical designs in connection with the Observational Design procedure.
This document fulfils the requirements for the performance monitoring of the ground, of structures interacting with the ground and of geotechnical works by the means of piezometers, installed as part of the geotechnical investigation and testing in accordance with References [ 4] and [ 5] This document relates to measuring devices, which are installed in the ground. For pore water pressure measurements carried out in connection with cone penetration tests, see ISO 22476-1 .
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 13 | 4 Symbols and abbreviated terms 5 Instruments 5.1 General |
| 15 | 5.2 Open piezometer systems 5.2.1 General |
| 16 | 5.2.2 Types of open piezometer systems |
| 19 | 5.3 Closed piezometer systems 5.3.1 General |
| 22 | 5.3.2 Types of closed piezometer systems |
| 23 | 5.4 Absolute versus relative measurements and atmospheric compensation |
| 25 | 5.5 Requirements for filters 5.5.1 Filters in open piezometer systems 5.5.2 Filters in closed piezometer systems |
| 26 | 5.6 Measuring range and accuracy 6 Installation and measuring procedure 6.1 Installation 6.1.1 General |
| 27 | 6.1.2 Installation of open piezometer systems |
| 29 | 6.1.3 Installation of closed piezometer systems |
| 30 | 6.1.4 Checks before, during and after installation |
| 31 | 6.1.5 Maintenance 6.2 Carrying out the measurement 6.2.1 Instrumentation check and calibration |
| 32 | 6.2.2 Measurement 7 Data processing and evaluation 8 Reporting 8.1 Installation report 8.2 Monitoring report |
| 33 | Annex A (normative) Measuring and evaluation procedure |
| 40 | Annex B (informative) Geo-engineering applications |
| 42 | Annex C (informative) Protection of piezometers at the ground level |
| 45 | Annex D (informative) Response time for pore water pressure measurements |
| 48 | Annex E (normative) Fully grouted piezometer installation |
| 50 | Annex F (normative) Measuring negative pore water pressure (soil suction) |
| 51 | Annex G (informative) Measuring examples |
| 63 | Bibliography |
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