US4594899A
Expired / Lapsed
US
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Method and apparatus for testing soil
Assignee: Individual
•
Filing: 1984-03-06
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Granted: 1986-06-17
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Expires: 2004-03-06
Abstract
Abstract A method and apparatus for testing soil involves a probe with an inner cylinder insertable into the sample to be tested and rotatable through a limited arc of rotation. The inner cylinder may be rotated by an impulse, from an initial condition or by an oscillatory motion. An outer cylinder may be provided concentric to the inner cylinder and spaced therefrom to facilitate the measurement of liquefaction resistance and soil degradation. A motion sensor mounted on the inner cylinder enables the recording of the response of the cylinder and the soil to a particular rotary excitation. A shield may be provided about the upper end of the inner cylinder in order to allow measurements to be obtained from a region sufficiently below the surface of the soil so as to be relatively free from surface effects. A surface compression unit may be provided between the inner and outer cylinders which is operable to supply a pressure to compensate for the loss of overburden in downhole applications. The surface compression unit may also apply a rotating shear force to smooth the soil surface so that the pressure applied by the unit is uniform.
Inventors
- 👤 Robert Henke
- 👤 Wanda K. Henke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:11
CPC Classifications
E; E02; E02D; E02D1/00; E02D1/02; E02D1/022
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
83 words
A method of testing soil comprising the steps of: inserting a pair of concentric open ended cylinders into the soil to be tested; funneling said soil into the inner of said cylinders so as to space the soil from the inner surface of said inner cylinder; torsionally exciting the inner of said cylinders by rotating it through a limited arc oscillatory motion about its cylindrical axis; and obtaining a measure of the resistance of the soil to the excitation of the inner cylinder.
Claim 2
Independent Claim
83 words
A method of testing soil comprising the steps of: inserting a pair of concentric open ended cylinders into the soil to be tested; funneling said soil into the inner of said cylinders so as to space the soil from the inner surface of said inner cylinder; torsionally exciting the inner of said cylinders by rotating it through a limited arc oscillatory motion about its cylindrical axis; and obtaining a measure of the resistance of the soil to the excitation of the inner cylinder.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein the step of obtaining a measure of the resistance of the soil to the rotation of the inner cylinder includes the step of measuring the motion of said inner cylinder.
Claim 4
Dependent Claim
17 words
The method of claim 2 including the step of measuring the torque applied to said inner cylinder.
Claim 5
Dependent Claim
22 words
The method of claim 1 including the step of shielding the upper end of said inner cylinder from contact with the soil.
Claim 6
Dependent Claim
27 words
The method of claim 1 including the step of first exciting said inner cylinder at a low amplitude and thereafter exciting said cylinder at a high amplitude.
Claim 7
Dependent Claim
18 words
The method of claim 1 including the step of oscillating said inner cylinder sufficiently to liquefy the soil.
Claim 8
Dependent Claim
25 words
The method of claim 1 including the step of applying a downward pressure to the top of the soil between the inner and outer cylinders.
Claim 9
Dependent Claim
39 words
The method of claim 7 wherein said step of applying a pressure to the top of the soil includes the step of applying a smoothing force to the top of the soil while applying said pressure to said soil.
Claim 10
Dependent Claim
21 words
The method of claim 1 including the step of measuring the pore water pressure of said soil within said outer cylinder.
Claim 11
Dependent Claim
24 words
The method of claim 1 including the step of measuring the total stress of the test soil along the inside of said outer cylinder.
Claim 12
Dependent Claim
17 words
The method of claim 1 including the step of applying an impulse torque to said inner cylinder.
Claim 13
Dependent Claim
17 words
The method of claim 1 including the step of rotating said inner cylinder from an initial condition.
Claim 14
Dependent Claim
17 words
The method of claim 1 including the step of applying an oscillating torque to said inner cylinder.
Claim 15
Dependent Claim
27 words
The method of claim 1 including the step of relieving the elastic stresses induced in the test soil during the insertion of said cylinders into the soil.
Claim 16
Dependent Claim
110 words
A soil testing probe comprising: a pair of concentric open ended cylinders, said cylinders being spaced apart so as to define a soil test chamber in the region between said cylinders; means for inserting said cylinders, open ends first, into a soil sample to be tested, such that soil enters said soil test chamber between said cylinders; means for applying a torque to the inner of said cylinders, to rotate said inner cylinder through a limited arc of oscillatory motion within said sample, about the cylindrical axis; and means for obtaining a measure of the resistance of the soil within said soil test chamber to the excitation of said cylinder.
Claim 17
Dependent Claim
110 words
A soil testing probe comprising: a pair of concentric open ended cylinders, said cylinders being spaced apart so as to define a soil test chamber in the region between said cylinders; means for inserting said cylinders, open ends first, into a soil sample to be tested, such that soil enters said soil test chamber between said cylinders; means for applying a torque to the inner of said cylinders, to rotate said inner cylinder through a limited arc of oscillatory motion within said sample, about the cylindrical axis; and means for obtaining a measure of the resistance of the soil within said soil test chamber to the excitation of said cylinder.
Claim 18
Dependent Claim
25 words
The probe of claim 15 wherein said measuring means includes means for measuring the motion of said inner cylinder in response to said torsional excitation.
Claim 19
Dependent Claim
20 words
The probe of claim 16 wherein said measuring means includes means for measuring the torque applied to said inner cylinder.
Claim 20
Dependent Claim
25 words
The probe of claim 15 including a means for applying a downward pressure to the top of the soil between said inner and outer cylinders.
Claim 21
Dependent Claim
17 words
The probe of claim 18 including means for measuring the pressure applied by said pressure applying means.
Claim 22
Dependent Claim
21 words
The probe of claim 18 wherein said pressure applying means includes means for shearing smooth the upper surface of said soil.
Claim 23
Dependent Claim
16 words
The probe of claim 15 including a shield surrounding the upper end of said inner cylinder.
Claim 24
Dependent Claim
14 words
The probe of claim 15 wherein said torque applying means includes impulse rotating means.
Claim 25
Dependent Claim
20 words
The probe of claim 15 wherein said torque applying means includes means for rotating said cylinder from an initial condition.
Claim 26
Dependent Claim
14 words
The probe of claim 15 wherein said torque applying means includes oscillatory rotating means.
Claim 27
Dependent Claim
17 words
The probe of claim 15 including means for selectively providing either high amplitude or low amplitude rotation.
Claim 28
Dependent Claim
31 words
The probe of claim 15 including an inwardly jutting guide on the lower end of said inner cylinder, arranged to divert the soil away from the inner surfaces of said cylinder.
Claim 29
Dependent Claim
32 words
The probe of claim 15 wherein said inner cylinder has a greater axial length than said outer cylinder in order to provide a fluid space at the top of said inner cylinder.
Claim 30
Dependent Claim
111 words
A soil testing apparatus comprising: an open ended, substantially cylindrical device; means for inserting said device open end first into a soil sample to be tested; means on the free end of said device for diverting the soil entering the device towards the center of said device; means for applying a torque to said device to rotate said device through a limited arc of oscillatory motion, within said sample, about the cylindrical axis; and measuring means for obtaining a measure of the torque applied by the soil in opposition to said rotational motion of said device, by measuring the response of said device to the torque applied by said applying means.
Claim 31
Dependent Claim
111 words
A soil testing apparatus comprising: an open ended, substantially cylindrical device; means for inserting said device open end first into a soil sample to be tested; means on the free end of said device for diverting the soil entering the device towards the center of said device; means for applying a torque to said device to rotate said device through a limited arc of oscillatory motion, within said sample, about the cylindrical axis; and measuring means for obtaining a measure of the torque applied by the soil in opposition to said rotational motion of said device, by measuring the response of said device to the torque applied by said applying means.
Claim 32
Dependent Claim
15 words
The apparatus of claim 28 wherein said torque applying means is an impulse rotating means.
Claim 33
Dependent Claim
20 words
The apparatus of claim 28 wherein said torque applying means includes means for rotating said device from an initial condition.
Claim 34
Dependent Claim
16 words
The apparatus of claim 28 wherein said torque applying means includes means for oscillating said device.
Claim 35
Dependent Claim
21 words
The apparatus of claim 28 including means for applying a downward pressure to the top of the soil around said device.
Claim 36
Independent Claim
77 words
A method for testing soil comprising the steps of: inserting a pair of concentric open ended cylinders into the soil to be tested; applying a downward pressure to the top of the soil between the inner and outer cylinders; torsionally exciting the inner of said cylinders by rotating it through a limited arc of oscillatory motion about its cylindrical axis; and obtaining a measure of the resistance of the soil to the excitation of the inner cylinder.
Claim 37
Independent Claim
77 words
A method for testing soil comprising the steps of: inserting a pair of concentric open ended cylinders into the soil to be tested; applying a downward pressure to the top of the soil between the inner and outer cylinders; torsionally exciting the inner of said cylinders by rotating it through a limited arc of oscillatory motion about its cylindrical axis; and obtaining a measure of the resistance of the soil to the excitation of the inner cylinder.
Claim 38
Dependent Claim
39 words
The method of claim 33 wherein said step of applying a pressure on the top of the soil includes the step of applying a smoothing force to the top of the soil while applying said pressure to said soil.
Claim 39
Dependent Claim
105 words
A soil testing apparatus comprising: an open ended, substantially cylindrical device; means for inserting said device open end first into a soil sample to be tested; means for applying a downward pressure to the top of the soil around said device; means for applying a torque to said device to rotate said device through a limited arc of oscillatory motion within said sample, about the cylindrical axis; and measuring means for obtaining a measure of the torque applied by the soil in opposition to said rotational motion of said device, by measuring the response of the device to the torque applied by said applying means.
Claim 40
Dependent Claim
105 words
A soil testing apparatus comprising: an open ended, substantially cylindrical device; means for inserting said device open end first into a soil sample to be tested; means for applying a downward pressure to the top of the soil around said device; means for applying a torque to said device to rotate said device through a limited arc of oscillatory motion within said sample, about the cylindrical axis; and measuring means for obtaining a measure of the torque applied by the soil in opposition to said rotational motion of said device, by measuring the response of the device to the torque applied by said applying means.
References Cited (Backward Citations)
US2303162A
Cited
US2603967A
Cited
US2709363A
Cited
US3435666A
Cited
US3465576A
Cited
US3561259A
Cited
US3709031A
Cited
US3643498A
Cited
SU586369A1
Cited
SU616561A1
Cited
US4274283A
Cited
US4302967A
Cited
US4353247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |