Claims
- 1. A soil testing assembly comprising:a soil testing cylinder; a housing; an extractor rod connecting said testing cylinder and said housing while allowing relative axial movement between the rod, the housing and the testing cylinder; and a torsional load cell, said rod extending through said torsional load cell.
- 2. The assembly of claim 1 wherein said rod has first and second enlarged ends.
- 3. The assembly of claim 1 including a member arranged to cause axial loading to bypass said cell.
- 4. The assembly of claim 1 including a torsional load cell and a first member, said cell being coupled to said first member, said first member adapted to allow said housing to axially engage said cylinder without axially loading said cell.
- 5. The assembly of claim 4 wherein said housing may be selectively disengaged from said cylinder such that rotary motion is conveyed from said first member to said cylinder through said load cell.
- 6. The assembly of claim 1 adapted to implement a single cylinder torsional cylindrical shear test.
- 7. A method for testing soil comprising:rotating a test cylinder in a soil sample; extending an extractor rod through a torsional load cell; measuring torsional loading using said torsional load cell; and causing axial loads to bypass said load cell.
- 8. The method of claim 7 including, when said cylinder is being inserted into a soil sample, causing axial loading to bypass said cell.
- 9. The method of claim 7 including, when said cylinder is being withdrawn from a soil sample, causing axial loading to bypass said cell.
- 10. The method of claim 7 including implementing a torsional cylindrical shear test.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is based on Provisional Application No. 60/049,341, filed Jun. 11, 1997, No. 60/059,463, filed Sep. 22, 1997 and No. 60/081,917 filed Apr. 16, 1998, and claims the benefit thereof.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/US98/11643 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO98/57143 |
12/17/1998 |
WO |
A |
US Referenced Citations (7)
Foreign Referenced Citations (8)
Number |
Date |
Country |
3 905409 |
Aug 1990 |
DE |
4328540 |
Jan 1994 |
DE |
64753 |
Nov 1982 |
EP |
56-142913 |
Nov 1981 |
JP |
58-71432 |
Apr 1983 |
JP |
59-52730 |
Mar 1984 |
JP |
60-73432 |
Apr 1985 |
JP |
8-285747 |
Nov 1996 |
JP |
Non-Patent Literature Citations (5)
Entry |
Derwent abstract SU 499517A “Rotational Sheer Soil tester—with hydraulic cylinder compressing gas and second turning sheering by rack and pinion” Assignee Power Syst Elec Net, Mar. 1976.* |
Derwent abstract of SU 653553 A “Shear torque firmness testing—by rotating blades and cylindrical cover together with, and separate from, specific torque measurement in each case” Chernikov et al, Mar. 1979.* |
Derwent abstract of SU 873018 B Solid Sheer strength test tool—with concave half-cylindrical blades on shank Chernikov et al, Oct. 1981.* |
Derwent abstract of SU 1154586 A “Solid Sheer strength test stand—uses recording device with hydraulic cylinder with spring-loaded upright” Assignee Energosetproekt, May 1985.* |
Dynamic In Situ Geotechnical Testing, Inc. Report prepared thereby for the U.S. National Science Foundation and the U.S. Federal Highway Administration, In Situ Nonlinear Shear Stress vs Strain Characteristics for Shallow Layers of Soil: 1-10/La Cienega Blvd., Undercrossing, Los Angeles, California, Appendix A: Simplified Torsional Cylindrial ImpulseShear Test, Prototype Testing Systems, and General Procedures. Nov. 1996. pp. A1-A5, especially: p. A1, A3 and A4 and p. A5, lines 1-7. |
Provisional Applications (3)
|
Number |
Date |
Country |
|
60/049341 |
Jun 1997 |
US |
|
60/059463 |
Sep 1997 |
US |
|
60/081917 |
Apr 1998 |
US |