The standard includes provisions for monitoring the quality of the pumped water and its discharge, ensuring that the test does not contaminate local water bodies and adheres to environmental regulations.
The standard describes two primary laboratory procedures:
This method is used when the test section is at the very bottom of an uncased borehole. Water is forced into or removed from the formation through the open end of the drilling string. Common procedures include:
Typical Applications: Coarse soils, gravels, and fractured rock where packer installation may be impractical.
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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).
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 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
Here’s a sample review for the standard BS EN ISO 22282-2:2012 – Geotechnical investigation and testing – Part 2: Permeability tests in a borehole using open systems (PDF format):
Title: Essential for geotechnical engineers – but the PDF has typical drawbacks
Rating: ⭐⭐⭐⭐ (4/5)
Review:
As a geotechnical consultant, I regularly need ISO 22282-2 for specifying and interpreting open-system permeability tests (e.g., Lefranc, open-end, and packer tests without back pressure). The BS EN ISO version is the UK-adopted standard, so it’s identical to the international one but includes the UK foreword and national annex.
Pros:
Cons (PDF-specific):
Verdict: Buy it if you’re legally required to follow BS EN standards. For reference only, a library copy or preview might suffice. The technical content is excellent, but BSI’s PDF formatting lags behind modern e-documents.
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):
Who needs this PDF?
Why purchase the official PDF?
Available from: BSI Group, ISO member bodies, or authorized standards resellers (e.g., ANSI Webstore, SAI Global, Techstreet).
Related standards:
In the world of civil engineering, BS EN ISO 22282-2 is the rulebook for measuring how water flows through the ground using open borehole systems. It’s a critical standard used to ensure that everything from skyscrapers to high-speed railways stays standing on solid, dry-ish ground. The Story: Testing the Ground for HS2
Imagine a massive infrastructure project like the HS2 (High Speed 2) railway in the UK. Before a single rail can be laid, engineers need to know if the ground will behave like a solid foundation or a soggy sponge.
The Problem: At a site like Greatworth, engineers needed to design deep foundations and drainage systems. If they underestimated the ground's permeability, water could seep in and destabilize the entire structure.
The Standard in Action: To get accurate data, they turned to BS EN ISO 22282-2:2012. This standard provided the specific "recipes" for three types of tests:
Constant Head Tests: Pumping water in at a steady rate to see how much the ground can "drink".
Falling Head Tests: Filling a borehole to the top and timing how fast the water level drops.
Rising Head Tests: Pumping water out and watching how fast the groundwater rushes back in.
The Result: By following the rigorous procedures in the BS EN ISO 22282-2 PDF, contractors like Stuart Wells were able to provide precise permeability values. These numbers allowed the designers to build safer foundations, plan effective dewatering, and ultimately keep the project on track. Why This Standard Matters
Safety: Prevents structural failures caused by hidden water flow or seepage.
Efficiency: Helps engineers design the right amount of drainage, saving millions in construction costs.
Reliability: Using a standardized "open hole" method ensures that data from one site can be accurately compared to another across the globe. INTERNATIONAL STANDARD ISO 22282-2
A very specific request!
BS EN ISO 22282-2 is a European Standard for "Geotechnical investigation and testing - Geotechnical design - Part 2: Soil and rock slopes and retaining structures".
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Summary of the standard:
The standard provides guidelines for the design of soil and rock slopes and retaining structures. It covers the following aspects:
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Before searching for a "bs en iso 22282-2 pdf", engineers must understand the value of the document. Here is why compliance matters:
Under-dewatering an excavation can lead to flooding and instability; over-dewatering can cause ground settlement and damage to neighboring structures. BS EN ISO 22282-2 ensures the data used for dewatering calculations is reliable.