The BS EN ISO 22282-2:2012 standard specifies the requirements for determining the local permeability of soil and rock using water permeability tests in open boreholes. It is a critical component of geotechnical investigations used for foundation design, seepage analysis, and dewatering planning. Core Objectives
The standard provides a framework for geohydraulic testing to:
Determine the hydraulic properties of the ground (permeability, transmissivity).
Establish groundwater conditions above and below the water table.
Assess site features crucial for the structural integrity of engineering works. Primary Test Methods
The standard outlines three main methods based on the expected permeability ( -value) of the ground: Application Range ( Procedure Summary Constant Flow Rate >10-6is greater than 10 to the negative 6 power
Injecting or withdrawing water at a steady rate while measuring head change over time. Variable Head 10-610 to the negative 6 power 10-910 to the negative 9 power bs en iso 22282-2 pdf
Producing an instantaneous change in hydraulic head and measuring its decay over time. Constant Head 10-410 to the negative 4 power 10-710 to the negative 7 power
Maintaining a steady hydraulic head and measuring the required flow rate over time. Equipment & Requirements Essential tools for compliance include:
Borehole setup: Casing or piezometers, and in some cases, perforated tubes or filter material.
Measurement devices: Flow rate sensors (5% accuracy) and water-level gauges (0.01 m accuracy).
Calibration: All equipment must be calibrated periodically or immediately before use. Accessing the PDF
This standard is a copyright-protected document published by the British Standards Institution (BSI) and the International Organization for Standardization (ISO). The BS EN ISO 22282-2:2012 standard specifies the
Official Purchase: You can buy the full PDF from authorized retailers like the BSI Knowledge Store or the ISO Store.
Previews: Some standards platforms like iTeh Standards offer a free preview of the first few pages. INTERNATIONAL STANDARD ISO 22282-2
When you download or purchase the BS EN ISO 22282-2 PDF, you will find detailed technical specifications. The standard outlines:
A mandatory checklist of what must be included in the final report, such as:
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: What Does the Standard Cover
This is the preferred method for depth-specific permeability measurement. A packer system (either single or double) is used to seal off a discrete length of the borehole.
Standard Procedure:
Typical Applications: Layered soils, fractured rock masses, and determining the permeability of specific strata.
In the field of geotechnical engineering, understanding the permeability of soil and rock is fundamental to designing foundations, slopes, earth dams, and dewatering systems. The British Standard BS EN ISO 22282-2:2012 is part of a multi-part European adoption of the international standard (ISO) that specifically addresses in-situ permeability testing.
This article provides a comprehensive overview of Part 2 of this standard, focusing on permeability tests using open end and packer systems. It explains the technical scope, testing procedures, and the importance of obtaining the official PDF for professional use.
Incorrect permeability data can lead to: