Patent BE493601A successfully refreshed from Google Patents.
Patent US4055958A successfully refreshed from Google Patents.
US4055958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slipforming method and apparatus for in situ lining of an upwardly open shaft with monolithic concrete
Assignee: Individual
•
Filing: 1976-09-20
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Granted: 1977-11-01
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Expires: 1996-09-20
Abstract
Abstract A slipform and method for lining upright shafts with monolithic concrete by pumping concrete downwardly through a "tremmie tube" to a slipform apparatus and simultaneously pulling the slipform apparatus upwardly within the shaft such that the delivered concrete is formed continuously into a monolithic lining within the shaft. The apparatus includes downwardly open outer and inner slipform members. The inner slipform or core member fits within a conical recess of the outer slipform member and includes a lower cylindrical portion for forming the open inside diameter of the lining. Concrete, in a wet condition, is delivered by the tremmie tube between the two slipform members and molded against the shaft wall. The tremmie tube is pulled upwardly from the shaft opening by a hoist mechanism that is also used during the previous drilling operation. The rate of ascent for the form members is timed in accordance with the setting time of the concrete so that the upwardly moving form members leave the formed concrete in a self-supporting state. The tremmie tube is made up of a plurality of interconnected tube sections. In the present method, individual tremmie tube sections are added at the hoist mechanism and then lowered to correspondingly lower the slipform assembly. After descending a desired distance, the steps are reversed and the tube is pulled upwardly at a relatively continuous rate while concrete is pumped down to the form members. Successive tubing lengths are removed as they clear the ground surface.
Inventors
- 👤 Raymond A. Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:41
CPC Classifications
E; E21; E21D; E21D5/00; E21D5/04; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
42 words
In a slipform assembly for lining in situ an upright upwardly open vertical walled shaft with monolithic concrete, a combination comprising: a conical outer form member having an open lower end; an upwardly closed inner core member to the outer form member;
Claim 2
Dependent Claim
42 words
In a slipform assembly for lining in situ an upright upwardly open vertical walled shaft with monolithic concrete, a combination comprising: a conical outer form member having an open lower end; an upwardly closed inner core member to the outer form member;
Claim 3
Dependent Claim
108 words
said inner core member having an upright wall spaced inwardly from the open lower end of the outer form member; sectioned tremmie tube means openly connected at a lower end to the outer core member for supporting the outer form and inner core members within the shaft and for receiving concrete at an upper end and directing the concrete downwardly between the outer form and inner core members; guide means on the tremmie tube for centering the outer form and inner core members in a shaft; and concrete supply means removably connected to the tremmie tube at its upper end for supplying fluid concrete to the tremmie tube.
Claim 4
Dependent Claim
108 words
said inner core member having an upright wall spaced inwardly from the open lower end of the outer form member; sectioned tremmie tube means openly connected at a lower end to the outer core member for supporting the outer form and inner core members within the shaft and for receiving concrete at an upper end and directing the concrete downwardly between the outer form and inner core members; guide means on the tremmie tube for centering the outer form and inner core members in a shaft; and concrete supply means removably connected to the tremmie tube at its upper end for supplying fluid concrete to the tremmie tube.
Claim 5
Dependent Claim
101 words
The combination as defined by claim 1 wherein the form member and core member are complementary in cross section to the shaft with the outer form member having a conical wall surface tapering from a lower circular edge adjacent the shaft wall upwardly to a reduced concrete inlet port end adapted to be connected to the tremmie tube; wherein the inner core member includes an inner conical surface inwardly adjacent and parallel to the outer conical surface; and wherein the upright core wall of the inner core member is connected to the inner conical surface at a lower peripherial edge thereof.
Claim 6
Dependent Claim
48 words
The combination as defined by claim 2 wherein the upright core wall is cylindrical and is formed of a single sheet of material with overlapping longitudinal edges and wherein means is included for moving the longitudinal edges in opposite lateral directions to selectively change the core wall diameter.
Claim 7
Dependent Claim
21 words
The combination as defined by claim 1 further including an open ventilator duct joining the inner core and outer form members.
Claim 8
Dependent Claim
26 words
The combination as defined by claim 1 wherein the guide means is comprised of ski assemblies mounted to the tremmie tube at longitudinally spaced locations thereon.
Claim 9
Dependent Claim
27 words
The slipform as defined by claim 5 wherein the tremmie tube is comprised of releasable interconnected and wherein the ski assemblies are removably mountable to the sections.
Claim 10
Dependent Claim
44 words
The combination as defined by claim 1 further comprising a concrete dump means on the core form member for dumping concrete directly from the area between the outer form and core member to the area enclosed by the upright wall of the core member.
Claim 11
Dependent Claim
20 words
The combination as defined by claim 1 further comprising vibrator means extending between the inner core and outer form member.
Claim 12
Independent Claim
156 words
A method of lining in-situ an upwardly open shaft with monolighic concrete, comprising the steps of: connecting a tremie tube to a slipform having an outer conical shaped form member complementary to the cross-sectional configuration of the shaft at a lower peripheral edge thereof and an inwardly spaced conical core member; lowering the slipform and the tremie tube into the shaft; pumping concrete in a plastic state through the tremie tube to the slipform between the outer conical shaped form member and the inwardly spaced conical core member; directing the pumped concrete downward and outward in a conical direction and discharging the concrete from the lower peripheral edge of the slipform to the space between the shaft wall and the slipform; simultaneously pulling the slipform upwardly within the shaft by the tremie tube as the concrete sets; and forming the received concrete into an open lining against the shaft wall as the slipform is pulled upwardly.
Claim 13
Independent Claim
156 words
A method of lining in-situ an upwardly open shaft with monolighic concrete, comprising the steps of: connecting a tremie tube to a slipform having an outer conical shaped form member complementary to the cross-sectional configuration of the shaft at a lower peripheral edge thereof and an inwardly spaced conical core member; lowering the slipform and the tremie tube into the shaft; pumping concrete in a plastic state through the tremie tube to the slipform between the outer conical shaped form member and the inwardly spaced conical core member; directing the pumped concrete downward and outward in a conical direction and discharging the concrete from the lower peripheral edge of the slipform to the space between the shaft wall and the slipform; simultaneously pulling the slipform upwardly within the shaft by the tremie tube as the concrete sets; and forming the received concrete into an open lining against the shaft wall as the slipform is pulled upwardly.
Claim 14
Dependent Claim
67 words
The method as recited by claim 9 wherein the tremmie tube is made up of a multiplicity of interconnected sections and is lengthened as the slipform is lowered into the shaft by successively connecting additional sections to the slipform and lowering them into the shaft; and wherein the slipform is raised by pulling the tremmie tube upwardly in increments and successively disconnecting and removing the tube sections.
Claim 15
Dependent Claim
23 words
The method as recited by claim 9 further comprising the step of vibrating the concrete as it is formed against the shaft wall.
Claim 16
Dependent Claim
23 words
The method as recited by claim 9 further comprising the step of centering the slipform within the shaft while it is pulled upwardly.
Claim 17
Dependent Claim
41 words
The method set out by claim 9 comprising the further step of providing means for selectively disengaging the core form member from the lining by contracting the form to a cross-sectional dimension less than the complementary cross-sectional dimension of the lining.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |