ISO 22476-2:2005 地盤調査とテスト—フィールドテスト—パート2：動的プロービング | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 22476-2 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical Committee ISO/TC 182, Geotechnics, Subcommittee SC 1, Geotechnical investigation and testing, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

ISO 22476 consists of the following parts, under the general title Geotechnical investigation and testing —Field testing:

• Part 1: Electrical cone and piezocone penetration tests
• Part 2: Dynamic probing
• Part 3: Standard penetration test
• Part 4: Menard pressuremeter test
• Part 5: Flexible dilatometer test
• Part 6: Self-boring pressuremeter test
• Part 7: Borehole jack test
• Part 8: Full displacement pressuremeter test
• Part 9: Field vane test
• Part 10: Weight sounding test
• Part 11: Flat dilatometer test
• Part 12: Lefranc permeability test
• Part 13: Water pressure test in rock
• Part 14: Pumping tests

Foreword

This document (EN ISO 22476-2:2005) has been prepared by Technical Committee CEN/TC 341"Geotechnical investigation and testing", the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 182"Geotechnics".

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2005, and conflicting national standards shall be withdrawn at the latest by July 2005.

EN ISO 22476Geotechnical investigation and testing - Field testing has the following parts:

• Part 1: Electrical cone and piezocone penetration tests
• Part 2: Dynamic probing
• Part 3: Standard penetration test
• Part 4: Ménard pressuremeter test
• Part 5: Flexible dilatometer test
• Part 6: Self-boring pressuremeter test
• Part 7: Borehole jack test
• Part 8: Full displacement pressuremeter test
• Part 9: Field vane test
• Part 10: Weight sounding test
• Part 11: Flat dilatometer test
• Part 12: Mechanical cone penetration test
• Part 13: Plate loading test

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

1 Scope

This document specifies requirements for indirect investigations of soil by dynamic probing as part of geotechnical investigation and testing according to EN 1997-1 and EN 1997-2.

This document covers the determination of the resistance of soils and soft rocks in situ to the dynamic penetration of a cone. A hammer of a given mass and given height of fall is used to drive the cone. The penetration resistance is defined as the number of blows required to drive the cone over a defined distance. A continuous record is provided with respect to depth but no samples are recovered.

Four procedures are included, covering a wide range of specific work per blow:

• dynamic probing light (DPL): test representing the lower end of the mass range of dynamic equipment;
• dynamic probing medium (DPM): test representing the medium mass range of dynamic equipment;
• dynamic probing heavy (DPH): test representing the medium to very heavy mass range of dynamic equipment;
• dynamic probing super heavy (DPSH): test representing the upper end of the mass range of dynamic equipment.

The test results of this document are specially suited for the qualitative determination of a soil profile together with direct investigations (e.g. sampling according to prEN ISO 22475-1) or as a relative comparison of other in situ tests. They may also be used for the determination of the strength and deformation properties of soils, generally of the cohesionless type but also possibly in fine-grained soils, through appropriate correlations. The results can also be used to determine the depth to very dense ground layers e.g. to determine the length of end bearing piles, and to detect very loose, voided, back-filled or infilled ground.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purpose of this document, the following terms and definitions apply.

Bibliography