22282-2 Pdf | Bs En Iso
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The standard describes two primary laboratory procedures:
The official BS EN ISO 22282-2 PDF provides detailed specifications on:
BS EN ISO 22282-2 is Part 2 of the ISO 22282 series. It outlines the requirements for the equipment, execution, and reporting of pumping tests. A pumping test involves pumping water from a well at a controlled rate and observing the change in water levels in the pumping well and nearby observation wells.
The standard covers four primary types of tests:
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The BS EN ISO 22282-2:2012 standard specifies the requirements for water permeability tests in boreholes using open systems. This part of the ISO 22282 series is a critical component of geotechnical investigations, used to determine the local permeability of soil and rock both above and below the groundwater level. Key Features of the Standard
Scope & Application: Defines procedures for geohydraulic testing to establish groundwater conditions and gather hydraulic properties essential for the design of foundations, retaining structures, and underground works.
Open System Methodology: Focuses on tests conducted in open boreholes without the use of packers, including both rising head and falling head test methods.
Test Environment: Applicable for stable and non-stable soil/rock, as well as unsaturated conditions.
Required Equipment: Specifies the use of casings, piezometers, and precise measuring devices for water volume and time (reading in seconds). bs en iso 22282-2 pdf
Reporting Requirements: Mandates comprehensive field reports that include a graphical presentation of results, quality evaluations, and limitations of the data to ensure third-party transparency. Typical Applications
Site Stability: Assessing foundation stability and seepage conditions for structural integrity.
Dewatering Planning: Determining groundwater inflow/outflow parameters for excavation and dewatering projects.
Engineering Modeling: Providing hydraulic input parameters for seepage and groundwater models used in environmental assessments.
For professional access or to purchase the full document, you can visit the BSI Knowledge store or other authorized standards distributors like NBS. INTERNATIONAL STANDARD ISO 22282-2
BS EN ISO 22282-2:2012 is the authoritative British and International Standard for determining the local water permeability ( ) of soil and rock through open-system borehole testing
. It is a critical component of geotechnical investigations used to assess site safety, structural integrity, and seepage conditions for civil engineering projects. BSI Knowledge Core Objectives The standard provides a rigorous framework for: Establishing local groundwater conditions.
Determining hydraulic properties (permeability) of both saturated and unsaturated ground.
Informing the design of foundations, earthworks, and dewatering programs. iTeh Standards Primary Test Methods
The standard specifies three distinct methodologies based on the expected permeability of the ground: iTeh Standards Procedure Summary Constant Flow Rate High permeability (
Impose a steady flow and record the change in hydraulic head over time. Variable Head Intermediate permeability
Induce an instantaneous head change and monitor the decay (recovery) rate. Constant Head Lower permeability ( 10 to the negative 7 power 10 to the negative 4 power
Maintain a fixed water level and measure the flow rate required to keep it constant. Key Technical Features Open-System Focus:
Unlike other parts of the ISO 22282 series that use packers (seals), Part 2 focuses on tests conducted in "open holes" where an isolated section is defined by the borehole's geometry. Unsaturated Soil Requirements:
Includes specific guidance for testing above the groundwater table, requiring a pre-saturation phase to reduce suction and ensure reliable Calculation Models:
Annex B outlines recognized interpretation methods, such as the Bouwer and Rice Cooper–Bredehoeft–Papadopoulos Calibration & Compliance:
Mandates the use of calibrated instruments and detailed reporting of field data to meet Eurocode 7 requirements. iTeh Standards Practical Applications
Consultants and geotechnical engineers use this standard to: BSI Knowledge SIST EN ISO 22282-2:2012 - iTeh Standards In the UK and EU, if a project
BS EN ISO 22282-2 an international standard that specifies requirements for determining the local water permeability of soils and rocks in an open borehole
. It is a critical component of geotechnical investigation services, aligning with Eurocode 7 (EN 1997-1 and EN 1997-2) to provide data for foundation design, seepage analysis, and dewatering programs. cdn.standards.iteh.ai Core Scope and Objectives This standard deals specifically with open systems
, where water is injected into or withdrawn from an isolated section of a borehole without the use of permanent seals or closed-loop pressure monitoring typical of Part 6. It applies to both saturated and unsaturated conditions , above and below the groundwater level. cdn.standards.iteh.ai Primary Test Methods
The standard outlines three primary methods based on the expected permeability ( -value) of the ground: standards.iteh.ai Constant Flow Rate Method : Best for high permeabilities (
m/s). It involves maintaining a steady injection or withdrawal rate while recording the change in hydraulic head over time. Variable Head Method : Ideal for intermediate ranges ( 10 to the negative 6 power 10 to the negative 9 power
m/s). An instantaneous change in head is produced (e.g., falling or rising head test), and the rate of recovery is measured. Constant Head Method : Suitable for mid-range permeabilities ( 10 to the negative 4 power 10 to the negative 7 power
m/s). A constant water level is maintained, and the required flow rate to sustain it is recorded. cdn.standards.iteh.ai Technical Requirements for Execution Test Section Preparation
: In non-stable ground, the standard requires perforated tubes, filter material, or open-end tests at the casing base. In stable rock, isolation may involve inflated packers or temporary piezometers. Equipment Accuracy : Water level measurements must be accurate to , and flow rate devices must be accurate within of their measuring range. Unsaturated Soils
: The standard provides specific guidance for pre-saturating low-permeability soils (silts/clays) to minimize the effects of suction, which can otherwise lead to unrepresentative results. Data Interpretation
: Informative annexes include standard interpretation models such as the Bouwer and Rice Cooper–Bredehoeft–Papadopoulos cdn.standards.iteh.ai Practical Applications The data derived from these tests are essential for:
SIST EN ISO 22282-2:2012 - Water Permeability Tests in Boreholes
Understanding BS EN ISO 22282-2: A Guide to Geohydraulic Borehole Testing
The BS EN ISO 22282-2:2012 standard is a critical document for civil engineers, hydrogeologists, and geotechnical contractors. It defines the requirements and procedures for determining the local water permeability of soil and rock using open systems within a borehole. Unlike closed systems that use packers to isolate sections under pressure, open systems typically involve measurements where the water surface is open to atmospheric pressure. Scope and Purpose of the Standard
The primary goal of this standard is to establish groundwater conditions and determine the hydraulic properties of the ground. These parameters are vital for:
Foundation Stability: Assessing how water flow affects the bearing capacity of the soil.
Seepage Analysis: Predicting water ingress into excavations or through dams.
Structural Integrity: Ensuring that engineering works can withstand geohydraulic pressures.
The standard applies to tests conducted both above and below the groundwater table in various geological conditions. Core Testing Methods National Standards Bodies (for non-UK users):
BS EN ISO 22282-2 outlines three primary methods for measuring permeability ( ) based on the ground's expected flow characteristics: Constant Flow Rate Method: Best for: Higher permeability soils (typically
Procedure: A steady flow of water is injected or withdrawn while recording the change in the water head over time until stability is reached. Variable Head Method (Falling or Rising Head): Best for: Intermediate permeability ranges.
Procedure: An instantaneous change in the water level (head) is induced—either by adding water (falling head) or removing it (rising head)—and the rate at which the level returns to its original state is recorded. Constant Head Method:
Procedure: The water level in the borehole is maintained at a constant height above or below the static water level, and the volume of water required to maintain this level is measured over time. Equipment and Technical Requirements
To ensure accuracy, the standard mandates specific equipment standards and calibration protocols:
Water-Level Measurement: Devices must be accurate to within 0.01 meters.
Flow Measurement: Devices used to measure the rate of injection or withdrawal must be accurate to within 5% of the reading range.
Calibration: All instruments must be calibrated before use, and these records must be included in the final test report. Implementation and Reporting
A standard-compliant investigation requires two distinct reports:
Field Report: Contains raw data, including borehole location, depth of the test section, initial water levels, and time-stamped measurements during the test.
Test Report: Provides the final interpretation of results, including calculated permeability values, graphs of head vs. time, and details on any unsaturated soil conditions encountered. Where to Access BS EN ISO 22282-2
The full technical document is a copyrighted publication and is usually obtained through official standards bodies or technical libraries: ISO 22282-2:2012 - Geotechnical investigation and testing
Title: BS EN ISO 22282-2:2012 – Geotechnical investigation and testing. Determination of permeability of soil and rock using field testing
Standard Overview:
BS EN ISO 22282-2 is a crucial European standard adopted from the international ISO framework. It specifies the requirements for performing field permeability tests by the open hole method (also known as slug tests or bailer tests) in soils and rock. This part of the ISO 22282 series focuses on tests conducted in a single borehole without packers, providing essential data for hydrogeological and geotechnical projects.
Key Technical Contents (What the PDF includes):
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