USE OF AIR-REGULATING VALVES IN GEOTECHNICAL LABORATORY TESTING

Pneumatic pressure is used in many different facets of laboratory testing of soil. These uses include the application of cell pressures and back pressures in triaxial and simple shear tests and the application of shear loads in a variety of tests. Computer control of pneumatic pressure is an important element in the automation of geotechnical laboratory tests. Three-way, programmable, air-regulating valves were used in a variety of applications for automated test control, including consolidation tests, instrumented oedometer tests, and cyclic simple shear tests, and for loading systems for pavement research. The digital pressure valves have advantages over other methods of pressure control in that (a) the computer control interface is simplified, (b) open-loop control is possible for many applications, and (c) cyclic loading is easily achievable.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 26-31
  • Monograph Title: Innovations in instrumentation and data acquisition systems
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00668942
  • Record Type: Publication
  • ISBN: 0309055148
  • Files: TRIS, TRB
  • Created Date: Nov 8 1994 12:00AM