US3798962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for predicting movements of structural members emplaced in the earth
Assignee: United States Atomic Energy Commission
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Filing: 1972-04-19
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Granted: 1974-03-26
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Expires: 1992-04-19
Abstract
Abstract A method for measuring frictional and bearing resistance of compressed granular materials such as sand or gravel to both longitudinal and lateral motion of a long structural member emplaced in a cylindrical container with the granular material packed around the member. The granular material is compressed by means of a platen at one end of the container. Then force is applied between the member and container until the member moves. The frictional and bearing properties of the granular material and the strains in the member may be determined from the amount of force required for the movement. The member is moved axially and radially in separate steps.
Inventors
- 👤 L Dibley
- 👤 M Zaslawsky
- 👤 A Blake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:56
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/24; G01N19/00; G01N19/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A method for determining applied forces and resultant frictional forces developed by moving a structural member relative to a granular material that is under a predetermined constant compression, comprising the steps of: placing a long structural member in a container, packing a granular material around the member, applying and holding at least one selected predetermined constant compressive force to the granular material to uniformly compress it around the member, measuring and recording the pressure of the granular material in the container, applying increasing amounts of force in successive steps on the member and relative to the container, and measuring, and recording during each step of increased force between the member and container, the movements of the member relative to the container, and the strains of the member.
Claim 2
Independent Claim
127 words
A method for determining applied forces and resultant frictional forces developed by moving a structural member relative to a granular material that is under a predetermined constant compression, comprising the steps of: placing a long structural member in a container, packing a granular material around the member, applying and holding at least one selected predetermined constant compressive force to the granular material to uniformly compress it around the member, measuring and recording the pressure of the granular material in the container, applying increasing amounts of force in successive steps on the member and relative to the container, and measuring, and recording during each step of increased force between the member and container, the movements of the member relative to the container, and the strains of the member.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said increasing amounts of force are applied to the member in an axial direction.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said increasing amounts of force are applied to the member in a lateral direction.
Claim 5
Dependent Claim
51 words
The method of claim 1 further including the step of changing the compressive force applied and held to the granular material and applying increasing amounts of said force in successive steps on the member and relative to the container for each changed compressive force applied and held to the granular material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |