1 / 18

GROUND INVESTIGATION TESTING Selection of Testing for SPECIFIERS

GROUND INVESTIGATION TESTING Selection of Testing for SPECIFIERS. Ground Investigations. The technical objectives of a ground investigation Characterize ground Determine hazards Assess suitability of a site for the proposed development Provide design parameters. 2.

penda
Download Presentation

GROUND INVESTIGATION TESTING Selection of Testing for SPECIFIERS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. GROUND INVESTIGATION TESTINGSelection of Testingfor SPECIFIERS

  2. Ground Investigations The technical objectives of a ground investigation • Characterize ground • Determine hazards • Assess suitability of a site for the proposed development • Provide design parameters 2

  3. Achieving Technical Objectives To identify and classify soil and rock samples and determine soil and rock properties relevant to the technical objectives of the ground investigation • Geological description of samples collected during investigation • In-situ testing during investigation • Geotechnical and analytical laboratory testing of samples collected during investigation 3

  4. Laboratory Testing Testing by a laboratory accredited to ISO 17025 is an essential part of soil and rock testing • Competency of staff • Control of test conditions • Accuracy of test measurements • Traceability of measurements to national standards • Control of test material • Repeatability of results 4

  5. Presentation of Results • AGS Electronic Data Format • To the format specified by standard for the test 5

  6. Laboratory Testing • Soil and Water testing • Rock Testing • Chemical Testing (for effect on construction materials) • Contamination (Analytical) Testing 6

  7. Types of Laboratory Tests • Classification tests • Chemical Tests • Compaction Tests • Shear strength and triaxial tests • Consolidation Tests • Permeability Tests • Specialist Tests • Rock Tests • Contamination Tests 7

  8. Structuring the Test Schedule • Design data required and for what purpose • Identification of material characteristics • Identification of contamination levels • Type of sample needed • Minimum mass of sample • Multiple tests on samples 8

  9. Classification Tests • Moisture content • Density • Atterberg limits • Particle size distribution 9

  10. Rock Testing • Classification (moisture, density, porosity, slake durability) • Point load strength • Uniaxial compressive strength and modulus • Triaxial strength • Permeability 10

  11. Chemical Tests • To provide design parameters for civil engineering materials in the ground • pH, sulphate, chloride, carbonate • Organic content and mass loss on ignition • Special testing (eg SD1) 11

  12. Compaction Tests • Density/moisture content relationships • California bearing ratio (CBR) • Moisture condition value tests (MCV) • Maximum/minimum density • Combined relationship testing 12

  13. Shear Strength and Triaxial Tests • Shear Box • Laboratory vane shear • Quick undrained triaxial test (total stress) • Consolidated undrained triaxial test (effective stress) • Consolidated drained triaxial test (effective stress) • Ring shear for residual strength 13

  14. Consolidation Tests • One dimensional consolidation • Triaxial consolidation • Hydraulic cells (Rowe) • Swelling tests 14

  15. Permeability Tests • Constant head permeameter • Falling head permeameter • Triaxial permeability 15

  16. Specialist Soils Tests Other tests are available for specific purposes Talk to your Laboratory 16

  17. Contamination Testing • pH • Organics • Inorganics • Metals • Asbestos 17

  18. Further Guidance • AGS Guide: The selection of geotechnical soil laboratory testing • AGS Addendum note on Analytical Testing • AGS Guide lines for Combined Geoenvironmental and Geotechnical Investigations • If in doubt seek advice from the laboratory 18

More Related