ISO 22282-6:2012 PDF

Geotechnical investigation and testing — Geohydraulic testing — Part 6: Water permeability tests in a borehole using closed systems

Название (английский):

ISO 22282-6:2012

Geotechnical investigation and testing — Geohydraulic testing — Part 6: Water permeability tests in a borehole using closed systems

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 1 июня 2012 г.
Издание:: ISO IS 22282 edition 1 version 1
ICS:: 93.020

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Описание (английский):

ISO 22282-6:2012 specifies requirements for the determination of the local permeability in soils and rocks below or above the groundwater table in a closed system by the water permeability tests as part of the geotechnical investigation services according to EN 1997-1 and EN 1997-2.

Технические детали

Технический комитет: ISO/TC 182 - Geotechnics
SKU: ISO 22282-6:2012

Abstract

Overview

ISO 22282-6:2012 - "Geotechnical investigation and testing - Geohydraulic testing - Part 6: Water permeability tests in a borehole using closed systems" defines procedures and requirements for measuring local water permeability in soils and rocks using closed-system borehole pulse tests. The standard is intended for geotechnical investigation services referenced in EN 1997-1 and EN 1997-2 and targets very low-permeability materials (order of 10‑8 m/s and lower). Tests determine the permeability coefficient (k) and may also provide transmissivity (T) and storage coefficient (S).

Key topics and technical requirements

Test principle: Apply an instantaneous pressure pulse (change in hydraulic head) to a packed-off borehole interval and record dissipation of pressure vs. time.
Equipment: pump or pressure source, pipes/tubing, single or double packer(s), isolating valve, pressure and temperature sensors, volume-measuring device and data acquisition system.
Installation & pre-test:
- Install tubing and packers; determine stabilized pre-test hydraulic head (below or above groundwater table).
- For tests above water table, a saturation phase is required before the pulse (duration depends on permeability).
Pressure pulse procedure:
- Limit pulse amplitude to avoid hydraulic fracturing (head increment recommended

Overview

Key topics and technical requirements

Test principle: Apply an instantaneous pressure pulse (change in hydraulic head) to a packed-off borehole interval and record dissipation of pressure vs. time.
Equipment: pump or pressure source, pipes/tubing, single or double packer(s), isolating valve, pressure and temperature sensors, volume-measuring device and data acquisition system.
Installation & pre-test:
- Install tubing and packers; determine stabilized pre-test hydraulic head (below or above groundwater table).
- For tests above water table, a saturation phase is required before the pulse (duration depends on permeability).
Pressure pulse procedure:
- Limit pulse amplitude to avoid hydraulic fracturing (head increment recommended

ISO 22282-6:2012 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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