US4867614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced soil and method
Assignee: Individual
•
Filing: 1987-08-28
•
Granted: 1989-09-19
•
Expires: 2007-08-28
Abstract
Abstract Composite mixtures comprise soil and from about 0.1 to 5 percent by weight of additive discrete fiber materials. A related method for improving the engineering properties of soil includes the steps of adding from about 0.1 to 5 percent by weight of discrete fiber materials to soil and mixing the materials and soil together to form a blend.
Inventors
- 👤 W. Wayne Freed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:23
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/40; C09K17/14; C09K17/16; E; E02; E02D; E02D3/00; E02D3/005; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
83 words
Reinforced soil having improved engineering properties for construction and excavation purposes comprising: natural soil selected from the group consisting of gravel, sand, silt, clay and mixtures thereof; and from about 0.1 to 5 percent by weight of discrete fiber materials mixed therein to improve the punching shear resistance, the total angle of internal friction, the average total cohesion and the average initial tangent modulus of said soil, said fiber materials being selected from the class consisting of man-made fiber forming substances and fiberglass.
Claim 2
Dependent Claim
83 words
Reinforced soil having improved engineering properties for construction and excavation purposes comprising: natural soil selected from the group consisting of gravel, sand, silt, clay and mixtures thereof; and from about 0.1 to 5 percent by weight of discrete fiber materials mixed therein to improve the punching shear resistance, the total angle of internal friction, the average total cohesion and the average initial tangent modulus of said soil, said fiber materials being selected from the class consisting of man-made fiber forming substances and fiberglass.
Claim 3
Dependent Claim
16 words
Reinforced soil, as set forth in claim 1, wherein said soil is a low plasticity silt.
Claim 4
Dependent Claim
15 words
Reinforced soil, as set forth in claim 1, wherein said discrete fiber materials are polyolefinic.
Claim 5
Dependent Claim
15 words
Reinforced soil, as set forth in claim 3, wherein said discrete fiber materials are polyolefinic.
Claim 6
Dependent Claim
24 words
Reinforced soil, as set forth in claim 3, wherein said discrete fiber materials are selected from the group consisting of degradable or biodegradable polyolefins.
Claim 7
Dependent Claim
22 words
Reinforced soil, as set forth in claim 5, wherein said soil is sand and said biodegradable polyolefin is utilized for beach stabilization.
Claim 8
Dependent Claim
15 words
Reinforced soil, as set forth in claim 1, wherein said discrete fiber materials are polyester.
Claim 9
Dependent Claim
31 words
Reinforced soil, as set forth in claim 1, wherein said discrete fiber materials are from about 1.25 to 10 cm long and have a thickness of about 0.12 to 2.5 mm.
Claim 10
Dependent Claim
31 words
Reinforced soil, as set forth in claim 1, wherein said discrete fiber materials are from about one to 12 mm long and have a thickness of about 0.12 to 2.5 mm.
Claim 11
Dependent Claim
24 words
Reinforced soil, as set forth in claim 1, wherein the specific gravity of said man-made fiber forming substances ranges from about 0.80 to 2.36.
Claim 12
Dependent Claim
20 words
Reinforced soil, as set forth in claim 1, wherein specific gravity of said fiberglass ranges from about 2.5 to 2.7.
Claim 13
Dependent Claim
24 words
Reinforced soil, as set forth in claim 1, wherein said discrete fiber materials comprise conventional fibers and slit film fibers having a discrete length.
Claim 14
Independent Claim
107 words
A method for improving the engineering properties of natural soils for construction and excavation purposes comprising the steps of: adding from about 0.1 to 5 percent by weight of discrete fiber materials to natural soil to improve the punching shear resistance, the total angle of internal friction, the average total cohesion and the average initial tangent modulus of said soil, wherein said fiber materials are selected from the class consisting of man-made fiber forming substances and fiberglass and said natural soil is selected form the group consisting of gravel, sand, slit, clay and mixtures thereof; and mixing said materials and natural soil together to form a blend.
Claim 15
Independent Claim
107 words
A method for improving the engineering properties of natural soils for construction and excavation purposes comprising the steps of: adding from about 0.1 to 5 percent by weight of discrete fiber materials to natural soil to improve the punching shear resistance, the total angle of internal friction, the average total cohesion and the average initial tangent modulus of said soil, wherein said fiber materials are selected from the class consisting of man-made fiber forming substances and fiberglass and said natural soil is selected form the group consisting of gravel, sand, slit, clay and mixtures thereof; and mixing said materials and natural soil together to form a blend.
Claim 16
Dependent Claim
13 words
A method, as set forth in claim 13, using a low plasticity silt.
Claim 17
Dependent Claim
13 words
A method, as set forth in claim 13, using polyolefinic discrete fiber materials.
Claim 18
Dependent Claim
13 words
A method, as set forth in claim 15, using polypropylene discrete fiber materials.
Claim 19
Dependent Claim
22 words
A method, as set forth in claim 13, using discrete fiber materials selected from the group consisting of degradable or biodegradable polyolefins.
Claim 20
Dependent Claim
17 words
A method, as set forth in claim 17, using sand and said biodegradable polyolefin for beach stabilization.
Claim 21
Dependent Claim
13 words
A method, as set forth in claim 13, using polyester discrete fiber materials.
Claim 22
Dependent Claim
30 words
A method, as set forth in claim 13, using discrete fiber materials having a length of about 1.25 to 10 cm and a thickness of about 0.12 to 2.5 mm.
Claim 23
Dependent Claim
30 words
A method, as set forth in claim 13, using discrete fiber materials having a length of about one to 12 mm and a thickness of about 0.12 to 2.5 mm.
Claim 24
Dependent Claim
23 words
A method, as set forth in claim 13, employing man-made fiber forming substances having a specific gravity ranging from about 0.80 to 2.36.
Claim 25
Dependent Claim
20 words
A method, as set forth in claim 13, employing fiberglass having a specific gravity ranging from about 2.5 to 2.7.
Claim 26
Dependent Claim
18 words
A method, as set forth in claim 13, using discrete fiber materials comprising fibers and slit film fibers.
References Cited (Backward Citations)
US3971223A
Cited
US4015994A
Cited
US4199366A
Cited
JPS55124582A
Cited
US4261725A
Cited
US4272294A
Cited
US4565840A
Cited
JPS5740193A
Cited
US4403891A
Cited
US4662946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |