US3735541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for anchoring tie-rods in ground
Assignee: Individual
•
Filing: 1971-07-08
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Granted: 1973-05-29
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Expires: 1991-07-08
Abstract
Abstract A tie-rod or cable is anchored in the earth by drilling a hole in the soil or rock and placing in the hole a double-wall casing comprising spaced inner sleeves and outer sleeves. Annular spacers between successive sections of the inner and outer sleeves have longitudinal holes receiving strands or bars of the cable or the rod to be anchored. The inner and outer sleeves are weakened by longitudinal slits or cuts. Cement injected under pressure through an injection tube inserted inside the casing causes slits in the inner sleeves to open so that the cement fills the annular space containing the tie-rod or cable bars or strands and then causes bursting of the outer sleeves to fill any space surrounding the casing. Seals between the injection tube and the spacers limit the injection to one section at a time. After injection with cement, the middle of the casing is flushed out to permit subsequent reinjection.
Inventors
- 👤 W Vanderlinde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/74; E02D5/80; E02D5/808
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
149 words
A method of anchoring tie-rods in the earth, comprising preparing a hole in the earth, positioning in said hole a doublewall casing comprising spaced inner and outer sleeves with annular spacers between successive sections of said sleeves and positioning tie-rod elements in longitudinal holes in said spacers so that said tie-rod elements are positioned between said inner and outer sleeves, said sleeves being prepared for opening or bursting upon application of internal pressure, inserting an injection tube inside said casing and injecting fluid cement under pressure into the interior of said casing to burst or open said inner sleeve, continuing the injection of cement under pressure to fill the annular space between the inner and outer sleeves and thereby fully envelope said tie-rod elements, and further continuing the injection of cement under pressure to burst or open the outer sleeve and inject cement into said hole around said casing.
Claim 2
Independent Claim
149 words
A method of anchoring tie-rods in the earth, comprising preparing a hole in the earth, positioning in said hole a doublewall casing comprising spaced inner and outer sleeves with annular spacers between successive sections of said sleeves and positioning tie-rod elements in longitudinal holes in said spacers so that said tie-rod elements are positioned between said inner and outer sleeves, said sleeves being prepared for opening or bursting upon application of internal pressure, inserting an injection tube inside said casing and injecting fluid cement under pressure into the interior of said casing to burst or open said inner sleeve, continuing the injection of cement under pressure to fill the annular space between the inner and outer sleeves and thereby fully envelope said tie-rod elements, and further continuing the injection of cement under pressure to burst or open the outer sleeve and inject cement into said hole around said casing.
Claim 3
Dependent Claim
39 words
A method according to claim 1, further comprising providing longitudinally spaced annular seals between said injection tube and said spacers to confine the injection of cement to one section at a time, and injecting cement into successive sections successively.
Claim 4
Dependent Claim
32 words
A method according to claim 1, further comprising flushing out the interior of said casing after an injection of cement to clear it of cement, and subsequently re-injecting cement in said casing.
Claim 5
Independent Claim
125 words
A system for anchoring tie-rods in holes in the earth, comprising a double wall casing comprising radially spaced inner and outer sleeves, longitudinally spaced annular spacers disposed between successive sections of said sleeves, said spacers having circumferentially spaced longitudinally extending holes, elements of said tie-rod to be anchored being received in said holes and thereby positioned between said inner and outer sleeves, and means for injecting cement under pressure into the interior of said casing, said inner and outer sleeves being weakened to be burst or opened upon application of pressure of said injected cement, whereby the injected cement fills the annular space between said inner and outer sleeves, thereby fully enveloping said tie-rod elements, and is further injected into said hole around said casing.
Claim 6
Independent Claim
125 words
A system for anchoring tie-rods in holes in the earth, comprising a double wall casing comprising radially spaced inner and outer sleeves, longitudinally spaced annular spacers disposed between successive sections of said sleeves, said spacers having circumferentially spaced longitudinally extending holes, elements of said tie-rod to be anchored being received in said holes and thereby positioned between said inner and outer sleeves, and means for injecting cement under pressure into the interior of said casing, said inner and outer sleeves being weakened to be burst or opened upon application of pressure of said injected cement, whereby the injected cement fills the annular space between said inner and outer sleeves, thereby fully enveloping said tie-rod elements, and is further injected into said hole around said casing.
Claim 7
Dependent Claim
47 words
An anchoring system according to claim 4, in which each of said annular spacer has an inwardly opening annular groove and a flexible sealing ring positioned in said groove and engageable with said injection tube to provide a flexible seal between said injection tube and said spacer.
Claim 8
Dependent Claim
51 words
An anchoring system, according to claim 4, in which each said annular spacer has at least one outwardly opening groove and a flexible sealing ring positioned in said groove and engaging an end portion of an adjacent outer sleeve section to provide a flexible fluid-tight joint between successive outer sleeve sections.
Claim 9
Dependent Claim
45 words
An anchoring system according to claim 6, in which each said annular spacer has two said outwardly opening grooves containing said flexible sealing rings engaging respectively end portions of two adjacent outer sleeve sections to provide a flexible fluid-tight joint between said outer sleeve sections.
Claim 10
Dependent Claim
17 words
An anchoring system according to claim 4, in which said outer sleeve sections are of frangible material.
Claim 11
Dependent Claim
24 words
An anchoring system according to claim 8, in which said outer sleeve sections are weakened between said spacers by longitudinally extending slits or cuts.
Claim 12
Dependent Claim
18 words
An anchoring system according to claim 8, in which said outer sleeve sections are formed of asbestos cement.
Claim 13
Dependent Claim
18 words
An anchoring system according to claim 4, in which said inner sleeve sections are formed of flexible material.
Claim 14
Dependent Claim
24 words
An anchoring system according to claim 11, in which said inner sleeve sections are weakened betwEen said spacers by longitudinally extending slits or cuts.
Claim 15
Dependent Claim
30 words
An anchoring system according to claim 4, in which said injection tube is of constant section and is closed at its inner end and provided with openings in its sides.
Claim 16
Dependent Claim
23 words
An anchoring system according to claim 4, further comprising means for flushing out the interior of said casing after said injection of cement.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |