US3453832A - Cast-in-place casings for concrete piles - Google Patents
Cast-in-place casings for concrete piles Download PDFInfo
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- US3453832A US3453832A US608381A US3453832DA US3453832A US 3453832 A US3453832 A US 3453832A US 608381 A US608381 A US 608381A US 3453832D A US3453832D A US 3453832DA US 3453832 A US3453832 A US 3453832A
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- United States
- Prior art keywords
- grout
- casing
- core
- drill
- earth
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/30—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
- C07D207/34—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/36—Oxygen or sulfur atoms
- C07D207/40—2,5-Pyrrolidine-diones
- C07D207/404—2,5-Pyrrolidine-diones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms, e.g. succinimide
- C07D207/408—Radicals containing only hydrogen and carbon atoms attached to ring carbon atoms
- C07D207/412—Acyclic radicals containing more than six carbon atoms
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/28—Condensation with aldehydes or ketones
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/234—Macromolecular compounds
- C10L1/238—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/2383—Polyamines or polyimines, or derivatives thereof (poly)amines and imines; derivatives thereof (substituted by a macromolecular group containing 30C)
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- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/18—Use of additives to fuels or fires for particular purposes use of detergents or dispersants for purposes not provided for in groups C10L10/02 - C10L10/16
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
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- C10M133/56—Amides; Imides
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- C10M3/00—Liquid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single liquid substances
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2810/00—Chemical modification of a polymer
- C08F2810/20—Chemical modification of a polymer leading to a crosslinking, either explicitly or inherently
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Definitions
- This application discloses an apparatus and method for forming cast-in-place casings for concrete piles.
- the apparatus is a drill having a hollow shaft with its lower end open at all times and a helical blade about it.
- a hollow pipe runs parallel to the hollow shaft for inserting grout along the outside of the shaft.
- the process includes inserting the drill into the earth while leaving an earthen core in the shaft essentially untouched.
- Grout is ejected through the pipe as the auger is withdrawn thus forming a groute cylinder about the earthen core.
- the core may be removed from the center of the grout casing and concrete may be placed in the grout casing.
- a large structure demands a solid foundation.
- the type of soil must be taken into consideration. lf. the soil is relatively lirm, a hole may be drilled into the ground until a proper depth is reached and then withdrawn whereupon a foundation pile may be formed by simply placing concrete into the hole.
- a thin walled metal sleeve is usually placed into the hole after it is drilled to reinforce the walls. The concrete is .subsequently poured into the Sleeve.
- a disadvantage of this method is that the driving and withdrawing of a steel casing into the ground, may produce a vibration which can be transmitted to surrounding structures and therefore involves a substantial degree of risk of damage.
- British Patent 551,717 illustrates one method which deviates slightly from that normally used.
- a hollow casing having a spiral rib extending along its length and a shoe closing its lower end is pounded into the ground.
- a twisting motion is imparted to the casing because of the action of the rib as the casing moves into the earth. Concrete is then forced inside the casing and out of its lower end as it is withdrawn. During the withdrawal action, a grout mixture may be introduced between the outer casing wall and the hollow ribs.
- Patent 3,192,292 to Banks also relates to a method of forming hollow concrete casings. After a hole has been bored into the ground, a tapered core is inserted into the hole ⁇ and centered on a plug. Grout or wet concrete is then poured into the hole between the Wall and the core while the core is rotated until the grout or cement is Set. Once the grout is set, the core is removed leaving a hollow concrete pile. This process is not to be used in the soft soils in which the present invention has its utility.
- the Banks patent requires that a hole be dug and then an artificial core placed therein. This necessarily means that the soil can support itself. Moreover, it is easily seen that this type of method requires extensive equipment and a vast number of .steps to accomplish a similar result as that which is done much more simply in the instant invention.
- the present invention is primarily directed to forming large diameter piles in relatively soft soil. For this reason the normal procedure of simply ejecting it through the hollow core of an lauger drill is not possible, as explained above. This basic purpose also would eliminate any idea of simply pounding the casing into the ground because of the enormous mass of earth that would have to be compressed in moving such a large diameter casing into the ground.
- the apparatus of this invention includes a drill having a hollow casing with its lower end perpetually open and with a helical blade about the casing.
- a pipe passes through the helical blades in a close relationship to the hollow casing and along its entire length.
- the hollow pipe has appropriate means for connecting it to a grout supply.
- the process of forming the pile includes inserting the drill into the ground and injecting grout through the pipe as the auger is withdrawn from the earth while allowing an earthen core to remain Within the grout. After allowing the grout to dry, the core may be removed from the center of the grout casing and concrete is placed there- 1n.
- FIG. 1 shows a drilling apparatus using the subject of this invention.
- FIG. 2 indicates the withdrawal of the drill while injecting grout.
- FIG. 3 is a sectional taken through 3 3 of FIG. 2.
- FIG. 4 is a sectional taken through 4-4 of FIG. 2.
- FIG. 5 shows the grout casing after a core of soil has been removed.
- FIG. 6 is a sectional 6 6 of FIG. 5.
- FIG. 7 shows concrete being poured into the grout casing.
- a drilling apparatus 1 is mounted on a trailer 2 supported by wheels 3 and a support post 4.
- a hinged mast 7 is rotatably mounted on a triangular support 8 in a generally vertical direction. Near its center the mast 7 is supported by a hydraulic mast raising cylinder 9 which is rotatably mounted to the mast 7 at 10 and to a support on the trailer 2 at connection 11.
- a cable 14 wound on a spool 15 on the trailer 2 extends upward and is supported on rollers 16 mounted on top of the mast 7.
- a crown assembly 17 Suspended at one end of the cable 14 is a crown assembly 17 which includes a power input connection 18, a grout inlet 19 and a motor 20.
- the motor 20 is driven from a hydraulic or electrical supply (not shown) which is suitably attached to connection 18..
- a connecting shaft 23 Extending from the motor 20 is a connecting shaft 23 which supports the drill indicated generally as 24.
- the drill 24 comprises helical wound flights of a blade 25 about a hollow shaft 26. Extending out from the top of the drill 24 and down along its side parallel to but in close proximity thereof is a grout injection pipe 27.
- the grout injection pipe usually passes through the helical flights 25.
- the injection pipe 27 should be as close as possible to the hollow shaft 26 so that it does not unduly hinder the rotation of the drill 24.
- the pipe 27 may also be formed integral with the shaft 26 or fit inside it as long as its lower end ejects the grout outside of the shaft 26.
- the lowermost end 28 of the drill 24 is open at all times and permits the soil to pass into the center section of the shaft 26 las it descends into the earth 30.
- the drill 24 is rotated in a clockwise manner as viewed from the top thus penetrating the earth 30.
- the helical flights 25 penetrate a cylindrically shaped section of the soil 31. As it does so, it may simultaneously raise the soil 31 to the surface 32.
- the drill 24 After the drill 24 has descended to its maximum, it is then pulled upwardly either with or without rotation. As the drill moves upward, it moves the soil 31 to the surface 32 thus leaving an open space which is simultaneously filled with grout 34 from the pipe 27.
- the grout casing with the earth core may be used as a bearing surface for a structure.
- a solid earth column with a grout shell is, in fact, a better bearing member than a solid grout column having the same cross sectional ⁇ area as that of the shell.
- the shell with the earthen core is preferable to the solid member because of its lower length to cross-sectional diameter ratio.
- the core of earth 33 may be removed by any conventional means such as forming a slurry and pumping it to the earth (FIGS. and 6).
- the result is a grout casing having ⁇ an empty center.
- the casing 34 extends upwardly in the formation of a cylinder. Once the earth 33 is removed, the center may then be filled with concrete 35 (FIG. 7).
- a drill having a hollow shaft with a helical blade about it and a hollow pipe running parallel to said hollow shaft, in the soil;
- the lower end of said hollow shaft being open at all times and thereby forming a core of soil as said drill penetrates the soil;
Description
July 8, 1969 1 s. J. REHMAR CAST-IN-PLACE CASINGS FOR CONCRETE PILES Sheet Filed Jan. 10, 1967 INVENTOR. SOLOMON J. REHMAR BY 4W, 5W mul/am FIG. 4
ATIQRNEI Sheet of 2 July 8, 1969 s. J. REHMAR CAST-'IN-PLACE CASINGS FOR CONCRETE PILES Filed Jan. 1o. 1967 INVENTOR. SOLOMON J. lREHMAR ATTO RNEXS United States Patent O 3,453,832 CAST-IN-PLACE CASINGS FOR 'CONCRETE PILES Solomon J. Rehmar, Cleveland, Ohio, assignor to Intrusion Prepakt, Inc., Cleveland, Ohio, a corporation of Ohio Filed Jan. 10, 1967, ser. No. 608,331 Int. Cl. E02d 5/34; E21c 13/ 04; E21b 3/02 U.S. Cl. 61-53.64 5 Claims ABSTRACT F THE DISCLOSURE This application discloses an apparatus and method for forming cast-in-place casings for concrete piles. The apparatus is a drill having a hollow shaft with its lower end open at all times and a helical blade about it. A hollow pipe runs parallel to the hollow shaft for inserting grout along the outside of the shaft.
The process includes inserting the drill into the earth while leaving an earthen core in the shaft essentially untouched. Grout is ejected through the pipe as the auger is withdrawn thus forming a groute cylinder about the earthen core. After allowing the grout to dry, the core may be removed from the center of the grout casing and concrete may be placed in the grout casing.
Background 0f the invention A large structure demands a solid foundation. When forming the foundation, the type of soil must be taken into consideration. lf. the soil is relatively lirm, a hole may be drilled into the ground until a proper depth is reached and then withdrawn whereupon a foundation pile may be formed by simply placing concrete into the hole. Where the ground is softer and susceptible to caving in, a thin walled metal sleeve is usually placed into the hole after it is drilled to reinforce the walls. The concrete is .subsequently poured into the Sleeve. A disadvantage of this method is that the driving and withdrawing of a steel casing into the ground, may produce a vibration which can be transmitted to surrounding structures and therefore involves a substantial degree of risk of damage.
An alternate method of forming a pile in this type of soil, is to force an auger having a small closed hollow core into the ground and then as the auger is removedl forcing concrete through the core. However, this process has inherent limitations because it is not able to be used for diameters much in excess of sixteen inches since the larger amounts of earth that must be moved require very large and expensive augering equipment. A typical .apparatus and method are shown in Canadian Patent 670,- 042. It has the center closed during the boring operation so that an earthen core is not left in the hole upon termination of the operation.
British Patent 551,717 illustrates one method which deviates slightly from that normally used. A hollow casing having a spiral rib extending along its length and a shoe closing its lower end is pounded into the ground. A twisting motion is imparted to the casing because of the action of the rib as the casing moves into the earth. Concrete is then forced inside the casing and out of its lower end as it is withdrawn. During the withdrawal action, a grout mixture may be introduced between the outer casing wall and the hollow ribs.
It is obvious that the British Patent 551,717 could not be used in making larger diameter piles. The hollow casing is pounded with its end closed into the ground thus pushing the earth aside and compresses it as the casing travels downward. This process would be completely unworkable if the hollow casing had a large diameter. The amount of earth that would have to be moved would be 3,453,832l Patented July 8, 1969 lCe so large that the system would require unnecessarily large, expensive and powerful equipment.
Patent 3,192,292 to Banks also relates to a method of forming hollow concrete casings. After a hole has been bored into the ground, a tapered core is inserted into the hole `and centered on a plug. Grout or wet concrete is then poured into the hole between the Wall and the core while the core is rotated until the grout or cement is Set. Once the grout is set, the core is removed leaving a hollow concrete pile. This process is not to be used in the soft soils in which the present invention has its utility. The Banks patent requires that a hole be dug and then an artificial core placed therein. This necessarily means that the soil can support itself. Moreover, it is easily seen that this type of method requires extensive equipment and a vast number of .steps to accomplish a similar result as that which is done much more simply in the instant invention.
The present invention is primarily directed to forming large diameter piles in relatively soft soil. For this reason the normal procedure of simply ejecting it through the hollow core of an lauger drill is not possible, as explained above. This basic purpose also would eliminate any idea of simply pounding the casing into the ground because of the enormous mass of earth that would have to be compressed in moving such a large diameter casing into the ground.
Summary of the invention The apparatus of this invention includes a drill having a hollow casing with its lower end perpetually open and with a helical blade about the casing. A pipe passes through the helical blades in a close relationship to the hollow casing and along its entire length. The hollow pipe has appropriate means for connecting it to a grout supply.
The process of forming the pile includes inserting the drill into the ground and injecting grout through the pipe as the auger is withdrawn from the earth while allowing an earthen core to remain Within the grout. After allowing the grout to dry, the core may be removed from the center of the grout casing and concrete is placed there- 1n.
FIG. 1 shows a drilling apparatus using the subject of this invention.
FIG. 2 indicates the withdrawal of the drill while injecting grout.
FIG. 3 is a sectional taken through 3 3 of FIG. 2.
FIG. 4 is a sectional taken through 4-4 of FIG. 2.
FIG. 5 shows the grout casing after a core of soil has been removed.
FIG. 6 is a sectional 6 6 of FIG. 5.
FIG. 7 shows concrete being poured into the grout casing.
A drilling apparatus 1 is mounted on a trailer 2 supported by wheels 3 and a support post 4. A hinged mast 7 is rotatably mounted on a triangular support 8 in a generally vertical direction. Near its center the mast 7 is supported by a hydraulic mast raising cylinder 9 which is rotatably mounted to the mast 7 at 10 and to a support on the trailer 2 at connection 11.
A cable 14 wound on a spool 15 on the trailer 2 extends upward and is supported on rollers 16 mounted on top of the mast 7.
Suspended at one end of the cable 14 is a crown assembly 17 which includes a power input connection 18, a grout inlet 19 and a motor 20. The motor 20 is driven from a hydraulic or electrical supply (not shown) which is suitably attached to connection 18.. Extending from the motor 20 is a connecting shaft 23 which supports the drill indicated generally as 24.
The drill 24 comprises helical wound flights of a blade 25 about a hollow shaft 26. Extending out from the top of the drill 24 and down along its side parallel to but in close proximity thereof is a grout injection pipe 27. The grout injection pipe usually passes through the helical flights 25. The injection pipe 27 should be as close as possible to the hollow shaft 26 so that it does not unduly hinder the rotation of the drill 24. The pipe 27 may also be formed integral with the shaft 26 or fit inside it as long as its lower end ejects the grout outside of the shaft 26.
The lowermost end 28 of the drill 24 is open at all times and permits the soil to pass into the center section of the shaft 26 las it descends into the earth 30.
In using the drilling apparatus 1, the drill 24 is rotated in a clockwise manner as viewed from the top thus penetrating the earth 30. As it descends downward, the helical flights 25 penetrate a cylindrically shaped section of the soil 31. As it does so, it may simultaneously raise the soil 31 to the surface 32.
After the drill 24 has descended to its maximum, it is then pulled upwardly either with or without rotation. As the drill moves upward, it moves the soil 31 to the surface 32 thus leaving an open space which is simultaneously filled with grout 34 from the pipe 27.
It should be noted that as the drill 24 moves upwardly and the grout 34 forms a casing, a central core of earth 33 (best seen in FIGS. 2, 3 and 4) is maintained. Because this central core of earth is not in any Way moved during the initial drilling and grout filling procedure, large machinery and power is not required to perform the operations in the instant invention.
The grout casing with the earth core may be used as a bearing surface for a structure. A solid earth column with a grout shell, is, in fact, a better bearing member than a solid grout column having the same cross sectional `area as that of the shell. The shell with the earthen core is preferable to the solid member because of its lower length to cross-sectional diameter ratio.
If desired, the core of earth 33 may be removed by any conventional means such as forming a slurry and pumping it to the earth (FIGS. and 6). The result is a grout casing having `an empty center. The casing 34 extends upwardly in the formation of a cylinder. Once the earth 33 is removed, the center may then be filled with concrete 35 (FIG. 7).
It is also possible to excavate outside the grout casing in order to form an enlarged end bearing area.
For ease of description, the principles of the invention have been set forth in connection with but a single illustrated embodiment. It is not my intention that the illustrated embodiment nor the terminology employed in describing it be limiting inasmuch as variations in these may be made without departing from the spirit of the invention. Rather I desire to be restricted only by the scope of the appended claims.
I claim:
1. The method of forming cast-inplace casings for concrete piles comprising:
inserting a drill, having a hollow shaft with a helical blade about it and a hollow pipe running parallel to said hollow shaft, in the soil;
the lower end of said hollow shaft being open at all times and thereby forming a core of soil as said drill penetrates the soil;
withdrawing said hollow shaft;
injecting grout around said core of soil as said shaft is withdrawn.
2. The method of claim 1 wherein the core of earth from the center of the grout casing is removed; and
concrete is placed into said grout casing.
3. The method of claim 2 wherein said drill is inserted into the earth by rotating it to a required depth.
4. The method of claim 3 wherein said core of soil is removed by forming a slurry and pumping it to the surface.
5. The method of claim 4 wherein said drill is rotated while it is withdrawn to bring loose soil to the surface and thereby make a space into which said grout may be injected.
References Cited UNITED STATES PATENTS 1,484,352 2/1924 Izard 175-394 X 2,955,805 10/1960 .Tones et al. 175-394 X 3,090,204 5/1963 Upson 61-53.66 3,336,760 8/1967 Landau 61-5366 X JACOB SHAPIRO, Primary Examiner.
U.S. Cl. X.R.
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US608381A Expired - Lifetime US3453832A (en) | 1963-09-09 | 1967-01-10 | Cast-in-place casings for concrete piles |
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US307329A Expired - Lifetime US3455832A (en) | 1963-09-09 | 1963-09-09 | Schiff bases |
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Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3980145A (en) * | 1973-10-19 | 1976-09-14 | Wibom Gustaf H O | Method and apparatus for inserting tubular structural members in a soil formation |
US4063424A (en) * | 1975-09-10 | 1977-12-20 | Takenaka Komuten Co., Ltd. | Device for constructing a foundation in soft soil formations |
DE3235118A1 (en) * | 1981-09-22 | 1983-04-07 | Dnepropetrovskij inženerno-stroitel'nyj institut, Dnepropetrovsk | DEVICE FOR THE PRODUCTION OF LOCAL PILLARS AND METHOD FOR THE PRODUCTION OF SUCH PILLARS USING THIS DEVICE |
EP0132274A1 (en) * | 1983-01-18 | 1985-01-30 | Electric Power Research Institute, Inc | Techniques for establishing inground support footings and for strengthening and stabilizing the soil at inground locations |
EP0132274A4 (en) * | 1983-01-18 | 1986-11-26 | Frank Kinnan | Techniques for establishing inground support footings and for strengthening and stabilizing the soil at inground locations. |
US4697649A (en) * | 1984-08-15 | 1987-10-06 | Utilitech, Incorporated | Portable apparatus for and method of pole reinforcement |
US4902171A (en) * | 1987-02-09 | 1990-02-20 | Soletanche | Process for reinforcing a driven tubular piling, the piling obtained by this process, an arrangement for implementing the process |
US4958962A (en) * | 1989-06-28 | 1990-09-25 | Halliburton Company | Methods of modifying the structural integrity of subterranean earth situs |
US5697734A (en) * | 1993-07-05 | 1997-12-16 | Beheersmaatschappij Verstraeten B.V. | Method for forming a foundation pile in the ground utilizing a prefabricated pile shaft |
WO2000040808A1 (en) * | 1999-01-07 | 2000-07-13 | Menard Soltraitement | Method and device for forming a foundation pipe pile in the ground |
US6749372B2 (en) * | 2001-06-20 | 2004-06-15 | Qing-Dao Xie | Underground shell-pile continuous wall job practice and its special drill |
US20170370067A1 (en) * | 2014-12-12 | 2017-12-28 | Maik Kettner | Methods and devices for improving the subsoil |
US10774494B2 (en) * | 2014-12-12 | 2020-09-15 | Maik Kettner | Methods and devices for improving the subsoil |
CN115419059A (en) * | 2022-08-30 | 2022-12-02 | 中铁七局集团武汉工程有限公司 | Pile foundation construction method suitable for complex geology |
Also Published As
Publication number | Publication date |
---|---|
NL6410287A (en) | 1965-03-10 |
DE1594486B2 (en) | 1971-12-09 |
DE1594486A1 (en) | 1971-12-09 |
US3455832A (en) | 1969-07-15 |
BE652796A (en) | 1964-12-31 |
FR1411318A (en) | 1965-09-17 |
SE325359B (en) | 1970-06-29 |
IL22052A (en) | 1970-04-20 |
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