Claims
- 1. A pipe pier inserting tool comprising:
- a supporting frame defining a pipe driving axis;
- means for coupling said frame to a load;
- first means coupled to said frame for driving a pipe along said pipe driving axis;
- first coupling means for coupling said pipe to said first means for driving, said first coupling means being extendably engaged with said first means for driving, for extension and retraction thereby, said first coupling means being adapted to grip said pipe when said means for driving is forced to an extended position, and to release said pipe when said means for driving is retracted;
- second means coupled to said frame for driving said pipe along said pipe driving axis; and
- second means for coupling said pipe to said second driving means, said second coupling means being extendably engaged with said second driving means, for extension and retraction thereby, said second coupling means being adapted to grip said pipe when said means for driving is forced to an extended position, and to release said pipe when said second driving means is retracted.
- 2. A pipe inserting tool as in claim 1 wherein said second coupling means is adapted to grip said pipe when said first means for coupling is retracted, and to release said pipe when said first coupling means is extended.
- 3. A pipe pier inserting tool as in claim 1, wherein each of said first and second coupling means comprise annular clamps positioned to surround said pipe, each clamp including pipe gripping inserts having teeth disposed thereon angled in the direction said pipe is to be driven.
- 4. A pipe pier inserting tool as in claim 1 wherein each of said first and second driving means comprises at least one hydraulic ram supported by one of said frame cross members.
- 5. A pipe pier inserting tool as in claim 1 wherein each of said first and second driving means comprises a pair of hydraulic rams, each of said first and second driving means being supported by one of said frame cross members.
- 6. The process of underpinning and raising portions of a building foundation as in claim 1 wherein said first and second driving means are operated in tandem.
- 7. A pipe pier inserting tool comprising:
- a supporting frame adapted to be coupled to a load and defining pipe driving axis;
- first means for releasably coupling a pipe to be driven to said frame disposed along said pipe driving axis;
- first means for driving said pipe along said axis, said first means for driving being coupled to said frame and in extendable and retractable engagement with said first means for coupling;
- second means for releasably coupling said pipe to said frame disposed along said pipe driving axis; and
- second means for driving said pipe along said axis, said second means for driving being coupled with said frame and in extendable and retractable engagement with said second means for coupling.
- 8. A pipe pier inserting tool as in claim 7, wherein said supporting frame comprises at least two stationary frame support members held in spaced parallel relationship by lateral frame support members, each of said frame cross support members extending across said pipe driving axis and having a hole therethrough at said axis to allow said pipe to be driven to pass therethrough.
- 9. A pipe pier inserting tool as in claim 7 wherein each of said first and second means for releasably coupling said pipe comprises an annular clamp.
- 10. A pipe pier inserting tool as in claim 7 wherein each of said driving means comprises at least one hydraulic ram supported by one of said frame cross members.
- 11. A pipe pier inserting tool as in claim 7 wherein each of said first and second driving means comprises a pair of hydraulic rams, each of said first and second driving means being supported by one of said frame cross members.
- 12. The process of underpinning and raising portions of a building foundation resting on underlying soil comprising the steps of:
- boring a hole in said foundation, the length of said hole defining a pipe driving axis;
- mounting a pipe driver adjacent said hole, said pipe driver including first and second means for gripping a pipe and first and second means for driving a pipe, said first gripping means being extendably connected to said first driving means, and said second gripping means being extendably connected to said second driving means, and each of said gripping means being disposed along said pipe driving axis;
- inserting a pipe axially into said pipe driver along said pipe driving axis;
- gripping said pipe with said first gripping means;
- driving the length of said pipe through said hole in said foundation by forcing said first driving means to an extended position;
- gripping said pipe with said second gripping means; and
- driving the length of said pipe through said hole in said foundation by forcing said second driving means to an extended position.
- 13. The process of underpinning and raising portions of a building foundation as in claim 11 wherein said first and second driving means are operated sequentially whereby each of said first and second driving means is alternately forced to an extended position, while the other is retracted, so as to continuously force said pipe through said hole in said foundation.
- 14. A method of forming a pressure grouted pier comprising:
- a. inserting a length of perforated pipe into the soil;
- b. providing a volume surrounding at least a portion of the exteriors of the length of said pipe that is free of soil;
- c. forcing grout through said perforations in said pipe and into said volume; and
- d. inserting a sleeve to surround said pipe along a non-grouted portion of the length of said pipe.
RELATED APPLICATIONS
This application is a continuation-in-part of my application number 07/324,297, filed Mar. 15, 1989, now U.S. Pat. No. 4,907,916.
US Referenced Citations (19)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
324297 |
Mar 1989 |
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