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USE OF AIR-REGULATING VALVES IN GEOTECHNICAL LABORATORY TESTING.
| 题名： | USE OF AIR-REGULATING VALVES IN GEOTECHNICAL LABORATORY TESTING. |
| 作者： | Brandon-TL; Sehn-AL |
| 关键词： | AIR-REGULATING-VALVES; GEOTECHNICAL-LABORATORIES; LABORATORY-TESTS; SOIL-TESTING; PNEUMATIC-PRESSURE; COMPUTER-CONTROL-SYSTEMS; AUTOMATION-; CONSOLIDATION-TESTS; OEDOMETER-TESTS; SHEAR-TESTS; OPEN-LOOP-CONTROL; CYCLIC-LOADING |
| 摘要： | 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. |
| 总页数： | Transportation Research Record. 1994. (1432) pp26-31 (9 Fig., 1 Tab., 7 Ref.) |
| 报告类型： | 科技报告 |
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