EP0299118A1 - Method and device for compacting soil - Google Patents
Method and device for compacting soil Download PDFInfo
- Publication number
- EP0299118A1 EP0299118A1 EP87202420A EP87202420A EP0299118A1 EP 0299118 A1 EP0299118 A1 EP 0299118A1 EP 87202420 A EP87202420 A EP 87202420A EP 87202420 A EP87202420 A EP 87202420A EP 0299118 A1 EP0299118 A1 EP 0299118A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ground
- drop weight
- compacting
- guiding means
- foregoing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
Definitions
- the invention relates to a method for compacting ground whereby a drop weight is dropped onto the ground.
- the invention has for its object to provide a different method for compacting ground, whereby the compacting result of the blows is better.
- the drop weight is guided relative to guiding means anchored to the ground.
- the result of this guiding is that the drop weight repeatedly comes down on the ground at the same location and in the same position.
- the compacting strokes which are substantially directed in the same direction have a good depth effect, even in the case that the drop weight comes loose of its guide while still above the ground.
- the drop weight is also guided by guiding means during the period in which the energy of the drop weight is transferred to the ground.
- the compacting result is then even better because any slight tilting of the drop weight when it makes contact with the ground is then prevented. Tilting of the drop weight could disturb the desired directed transmission of energy into the ground.
- mushroom-like compacted ground packets distributed over the ground are as it were formed, which provide the ground as a whole with a considerable bearing capacity, while the energy transferred to the ground, which corresponds virtually to the volume of the compacted ground packets, is very low compared to the energy required for a homogeneous compaction.
- the method according to the invention has of course the advantage that with the compacting apparatus available the compacting work can be completed much more quickly.
- the invention likewise relates to and provides an apparatus for performing the method according to the invention, as stated in claim 8.
- the apparatus 1 from fig. 1 consists of a lifting gear 2, a chassis 4 of which can swivel round a vertical axis 6 relative to a sub-frame 5 with caterpillar tracks 3 which support on the ground 21.
- a jib 7 can swivel on a horizontal axis 8.
- a guide bushing 9 can pivot on a horizontal shaft 11 in which bushing a vertically guided tubular pole 12 is arranged for sliding.
- Two pulleys 13 are mounted for pivoting on guide bushing 9 on either side of pole 12 for guiding two lifting cables 14 which carry a gripper member 16.
- the gripper member 16 comprises a lifting frame 17 guided round pole 12, on which two gripping elements 18 are mounted for pivoting on horizontal shafts 19.
- Suspension links 20 of the lifting cables 14 grip onto shafts 19.
- Each gripping element 18 has an open jaw 22 at its outer end, and a stop roller 23 at its inner end.
- a draw spring 24 is arranged between a pin 25 of the lifting frame 17 and a pin 26 of the outer end of the gripping element 18 such that a gripping element 18 in the release position shown in fig. 4 remains stable in this release position, since the draw spring 24 is then located under shaft 19.
- a locking member 27 which is vertically displaceable relative to lifting frame 17, has on its outer parts locking members 28 with vertical locking faces which co-operate with the stop rollers 23 of the gripping element 18, as can be seen in the lifting position from fig. 3.
- Locking member 27 has a stop console 30 arranged on a sliding rod. Accommodated between console 30 and lifting frame 17 are pre-tensioned compression springs 31 which force locking member 27 upward into the locking position, which is determined by a cross pin 32 of the sliding rod 29 striking against a flange 33 of lifting frame 17.
- the jaws 22 of the gripping elements 18 grip on horizontal tubes 34 of suspension frames 35 which are attached to the top part of a drop weight 36.
- the stop console 30 strikes up against a stop ring 38 attached to pole 12 at that point by means of cross pins 37 and gripping round pole 12 with the result that the compression springs 31 are pressed in, and the lifting frame 17 moves upward slightly further relative to locking member 27, until spring guide bushings 40 of compression springs 31 strike against each other.
- the stop rollers 23 and consequently the gripping elements come free of the locking elements 28 and then pivot into the release position shown in fig.
- the gripper member 16 can now be lowered down again by paying out lifting cables 14, whereby gripping elements 18 remain in their release position because of draw springs 24. In this release position they then grip on the tubes 34.
- the gripping elements 18 tilt into the lifting position, whereby the stop rollers 23 press locking member 27 downward.
- the compression springs 31 press locking member 27 into the locking position, after which the lifting of drop weight 36 for the next stroke cycle can begin.
- a cross pin 90 is inserted through transverse openings in the pole 12 above lifting frame 17, so that when lifting frame 17 is lifted by means of lifting cables 14, pole 12 can be pulled out of the ground, lifted and set down at another location on the ground.
- Cross pin 90 is then removed, lifting frame 17 is lifted slightly further and cross pin 90 is again inserted under lifting frame 17 into the pole 12.
- the lifting frame 17 with the drop weight 36 hanging from it is subsequently lowered, so that pole 12 with this drop weight is pushed 1 to 2 m into the ground 21. It has been found that with the drop weight 36 guided by the pole 12 anchored in the ground 21, a considerably more efficient compacting action is obtained compared with an uncontrolled fall of a drop weight.
- Pole 12 can also be used to measure the ground reaction occurring as a result of the blow.
- a measurement recorder 42 is fitted to the lower end of pole 12 for this purpose in the variant from fig. 5. This consists of a vertically downward directed pin 43 with four acceleration recorders 44 distributed over the periphery and an acceleration recorder 44 arranged on the bottom surface.
- the pin 43 can be driven as plunger of a hydraulic cylinder 45 downward into the ground and be withdrawn again.
- Cylinder 45 is elastically mounted with a rubber lining relative to pole 12.
- Pole 12 can also be used to set the ground 21 into vibration, while drop weight 36 is being dropped.
- a vibration unit 47 is arranged for this purpose on the top end of pole 12, which unit may be loaded with a mass 49 via springs 48.
- the drop weight 36 weighs for example 15,000kg.
- the drop weight 51 can as according to the variant from fig. 7 consist of three drop weight members 52 which are linked to one another by means of lugs 53 and pins 54.
- the drop weight 36 has for instance a stepped impact surface as in fig. 8 with a central bottom impact surface of for example 2 m2 and a surrounding higher impact surface 80 likewise of for example 2 m2.
- the drop weight 36 strikes the ground first with the small impact surface 69 and, because of the comparatively small impact surface 69, has an effect to a substantial depth q over a small width r (fig. 12 and 13).
- a compacted ground packet 82 is formed reaching down to for example 10 m.
- the seventh stroke for example the uppermost impact surface 80 lands on the ground surface 81, as a result of which the ground is subjected to the total impact surface of 4 m2.
- Formed as a result on the seventh and following strokes with a small depth effect is the ground packet 83 with a width s which is greater than the width r but a depth t which is smaller than the depth q .
- the first ground packet 82 may increase slightly in depth.
- Fig. 9 shows another form of a drop weight 58.
- a drop weight 60 is fastened to a swivel arm 61 which is arranged for pivoting on a pole 62 anchored in the ground, whereby the drop weight 60 is raised by means of a lifting cable 63 and then abruptly released by paying out a relevant winch.
- a drop weight 71 is guided into a tubular pole 72 which is anchored in the ground, and is lifted by means of a lifting cable 74 of a winch (not shown), which is paid out abruptly to cause the drop block to fall.
- drop weight 36 is usually guided preferably by disposing pole 12 vertically, it is also possible to anchor pole 12 slantwise in the ground 21.
- the present invention relates particularly to the compaction of ground to a considerable depth, for example 10 to 20 m.
- the top layer 79 is afterwards levelled and compacted in another way.
- the undersurface of the drop weight may be of a flat or a concave shape, depending on whether it is desired to counter or stimulate the sideward radiation of energy. Generally speaking a depth compaction and a limiting of the sideward radiation will be aimed for.
- An acceleration recorder can also be fitted to the drop weight in addition to the pole 12.
- the drop weight is raised to a greater height to compensate for the braking effect of the water, a slimmer drop weight with a small surface area of the undersurface is employed and/or more strokes are applied to the ground per compaction location.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Ground is compacted by dropping a weight onto the top surface of the ground. In order to effectively transfer the energy onto the ground the drop weight (36) is guided relatively to guide means (12).
Description
- The invention relates to a method for compacting ground whereby a drop weight is dropped onto the ground.
- Such method is known from DE-A-2351713. A drop weight is thereby allowed to fall freely onto the ground from a high level.
- The invention has for its object to provide a different method for compacting ground, whereby the compacting result of the blows is better. To this end according to the invention the drop weight is guided relative to guiding means anchored to the ground. The result of this guiding is that the drop weight repeatedly comes down on the ground at the same location and in the same position. The compacting strokes which are substantially directed in the same direction have a good depth effect, even in the case that the drop weight comes loose of its guide while still above the ground. Preferably however, the drop weight is also guided by guiding means during the period in which the energy of the drop weight is transferred to the ground. The compacting result is then even better because any slight tilting of the drop weight when it makes contact with the ground is then prevented. Tilting of the drop weight could disturb the desired directed transmission of energy into the ground.
- In order to decrease even further the compacting energy required, not only strokes with a small impact surface having a compacting result at considerable depth over only a small width, but also strokes with a larger impact surface having a compacting result to a smaller dpeth but over a greater width are applied according to the invention to each of a plurality of selected positions distributed over the ground at a distance from each other. The aim with this method is not to compact the ground packet homogeneously to a great depth, but to ensure a sufficiently homogeneous and acceptable settling over the entire surface. To this end, mushroom-like compacted ground packets distributed over the ground are as it were formed, which provide the ground as a whole with a considerable bearing capacity, while the energy transferred to the ground, which corresponds virtually to the volume of the compacted ground packets, is very low compared to the energy required for a homogeneous compaction. The method according to the invention has of course the advantage that with the compacting apparatus available the compacting work can be completed much more quickly.
- The invention likewise relates to and provides an apparatus for performing the method according to the invention, as stated in claim 8.
- Mentioned and other characteristics of the invention will now be elucidated in the description following hereinafter with reference to a drawing.
- In the drawing in schematic form:
- Fig. 1 shows a preferred embodiment of an apparatus according to the invention;
- Fig. 2 shows on a larger scale detail II from fig. 1;
- Fig. 3 shows on a larger scale detail III from fig. 1;
- Fig. 4 is a view corresponding to fig. 3 in a different position;
- Fig. 5 shows on a larger scale a variant of detail V from fig. 1;
- Fig. 6 shows on a larger scale a part of a variant of detail VI of the apparatus from fig. 1;
- Fig. 7, 8 and 9 each show a schematic view of a variant of detail VII from fig. 1;
- Fig. 10 and 11 each show a schematic view of in each case a different apparatus according to the invention; and
- Fig. 12 and 13 are each top views of two different foundations manufactured according to the invention.
- The apparatus 1 from fig. 1 consists of a lifting gear 2, a
chassis 4 of which can swivel round a vertical axis 6 relative to a sub-frame 5 withcaterpillar tracks 3 which support on theground 21. Ajib 7 can swivel on a horizontal axis 8. At the top end ofjib 7, a guide bushing 9 can pivot on ahorizontal shaft 11 in which bushing a vertically guidedtubular pole 12 is arranged for sliding. Twopulleys 13 are mounted for pivoting on guide bushing 9 on either side ofpole 12 for guiding twolifting cables 14 which carry agripper member 16. Thegripper member 16 comprises a liftingframe 17 guidedround pole 12, on which twogripping elements 18 are mounted for pivoting onhorizontal shafts 19. Suspension links 20 of thelifting cables 14 grip ontoshafts 19. - Each
gripping element 18 has anopen jaw 22 at its outer end, and astop roller 23 at its inner end. Adraw spring 24 is arranged between apin 25 of thelifting frame 17 and apin 26 of the outer end of thegripping element 18 such that agripping element 18 in the release position shown in fig. 4 remains stable in this release position, since thedraw spring 24 is then located undershaft 19. Alocking member 27 which is vertically displaceable relative to liftingframe 17, has on its outerparts locking members 28 with vertical locking faces which co-operate with thestop rollers 23 of thegripping element 18, as can be seen in the lifting position from fig. 3. - Locking
member 27 has astop console 30 arranged on a sliding rod. Accommodated betweenconsole 30 and liftingframe 17 are pre-tensionedcompression springs 31 which forcelocking member 27 upward into the locking position, which is determined by across pin 32 of the slidingrod 29 striking against aflange 33 oflifting frame 17. - In the lifting position from fig. 3, the
jaws 22 of thegripping elements 18 grip onhorizontal tubes 34 ofsuspension frames 35 which are attached to the top part of adrop weight 36. Whendrop weight 36 has been lifted to the required height of 10 or 15 m for example, thestop console 30 strikes up against astop ring 38 attached topole 12 at that point by means of cross pins 37 and gripping roundpole 12 with the result that thecompression springs 31 are pressed in, and thelifting frame 17 moves upward slightly further relative to lockingmember 27, until spring guide bushings 40 ofcompression springs 31 strike against each other. During the relative upward displacement oflifting frame 17 relative to thelocking member 27, thestop rollers 23 and consequently the gripping elements come free of thelocking elements 28 and then pivot into the release position shown in fig. 4 because of thedrop weight 36 hanging from it, as a result of whichdrop weight 36 falls down to theground 21. Thegripper member 16 can now be lowered down again by paying outlifting cables 14, whereby grippingelements 18 remain in their release position because ofdraw springs 24. In this release position they then grip on thetubes 34. As a result of the weight of thelifting frame 17, which is in the order of 900 kg, thegripping elements 18 tilt into the lifting position, whereby thestop rollers 23press locking member 27 downward. Afterstop rollers 23 have passed on, the compression springs 31press locking member 27 into the locking position, after which the lifting ofdrop weight 36 for the next stroke cycle can begin. - In order to move
pole 12 from one compacting location to another, across pin 90 is inserted through transverse openings in thepole 12 above liftingframe 17, so that when liftingframe 17 is lifted by means of liftingcables 14,pole 12 can be pulled out of the ground, lifted and set down at another location on the ground.Cross pin 90 is then removed,lifting frame 17 is lifted slightly further andcross pin 90 is again inserted underlifting frame 17 into thepole 12. Thelifting frame 17 with thedrop weight 36 hanging from it is subsequently lowered, so thatpole 12 with this drop weight is pushed 1 to 2 m into theground 21. It has been found that with thedrop weight 36 guided by thepole 12 anchored in theground 21, a considerably more efficient compacting action is obtained compared with an uncontrolled fall of a drop weight. -
Pole 12 can also be used to measure the ground reaction occurring as a result of the blow. Ameasurement recorder 42 is fitted to the lower end ofpole 12 for this purpose in the variant from fig. 5. This consists of a vertically downward directed pin 43 with fouracceleration recorders 44 distributed over the periphery and anacceleration recorder 44 arranged on the bottom surface. The pin 43 can be driven as plunger of a hydraulic cylinder 45 downward into the ground and be withdrawn again. Cylinder 45 is elastically mounted with a rubber lining relative topole 12. -
Pole 12 can also be used to set theground 21 into vibration, whiledrop weight 36 is being dropped. In the variant from fig. 6, avibration unit 47 is arranged for this purpose on the top end ofpole 12, which unit may be loaded with a mass 49 viasprings 48. Preferably arranged on the bottom end ofpole 12 which penetrates into theground 21 areresonance plates 50. - The
drop weight 36 weighs for example 15,000kg. - The
drop weight 51 can as according to the variant from fig. 7 consist of threedrop weight members 52 which are linked to one another by means oflugs 53 andpins 54. - The
drop weight 36 has for instance a stepped impact surface as in fig. 8 with a central bottom impact surface of for example 2 m² and a surroundinghigher impact surface 80 likewise of for example 2 m². - As a result the
drop weight 36 strikes the ground first with thesmall impact surface 69 and, because of the comparativelysmall impact surface 69, has an effect to a substantial depth q over a small width r (fig. 12 and 13). With the first, for example six, strokes a compactedground packet 82 is formed reaching down to for example 10 m. With the seventh stroke for example theuppermost impact surface 80 lands on the ground surface 81, as a result of which the ground is subjected to the total impact surface of 4 m². Formed as a result on the seventh and following strokes with a small depth effect is theground packet 83 with a width s which is greater than the width r but a depth t which is smaller than the depth q. With this second series of strokes thefirst ground packet 82 may increase slightly in depth. - Also conceivable is the forming first with a large impact surface of the
ground packet 83 for compacting, and the forming of the compactedground packet 82 later by employing in the first instance a drop weight member 56 and by coupling a second drop weight 57 underneath the latter by means of coupling means 85 at a later stage. It has been found that a very effective compaction can be realized if the ground is struck repeatedly at the same selected positions located at a distance from each other first with a large surface area of the drop weight and later with a surface area that is substantially smaller, for example a quarter part. Mushroom-like ground packets as it were are then compacted. In this way a foundation is formed which is as it were arch-shaped. Placed over this is atop layer 140 which compacted in another, conventional manner. The whole then forms a good foundation, whereby at least the minimal required quantity of ground is compacted, for which only little energy is required. -
- It is however conceivable that other, for example smaller or greater masses, are used and that a somewhat smaller or greater dropping height is applied. With a smaller bottom surface of the drop weight a greater depth will be achieved. The number of strokes required can be determined experimentally and/or by acceleration measurement.
- In the
apparatus 59 from fig. 10 adrop weight 60 is fastened to aswivel arm 61 which is arranged for pivoting on apole 62 anchored in the ground, whereby thedrop weight 60 is raised by means of a liftingcable 63 and then abruptly released by paying out a relevant winch. - In the
apparatus 70 from fig. 11 adrop weight 71 is guided into atubular pole 72 which is anchored in the ground, and is lifted by means of a liftingcable 74 of a winch (not shown), which is paid out abruptly to cause the drop block to fall. - Although
drop weight 36 is usually guided preferably by disposingpole 12 vertically, it is also possible to anchorpole 12 slantwise in theground 21. - It is remarked, that the present invention relates particularly to the compaction of ground to a considerable depth, for example 10 to 20 m. The top layer 79 is afterwards levelled and compacted in another way.
- The undersurface of the drop weight may be of a flat or a concave shape, depending on whether it is desired to counter or stimulate the sideward radiation of energy. Generally speaking a depth compaction and a limiting of the sideward radiation will be aimed for.
- An acceleration recorder can also be fitted to the drop weight in addition to the
pole 12. - In the case ground under water is being compacted, the drop weight is raised to a greater height to compensate for the braking effect of the water, a slimmer drop weight with a small surface area of the undersurface is employed and/or more strokes are applied to the ground per compaction location.
Claims (15)
1. Method for compacting ground whereby a drop weight is dropped on the ground, characterized in that said drop weight is guided relative to guiding means anchored on the ground.
2. Method as claimed in claim 1, characterized in that the drop weight is guided relative to guiding means inserted into the ground, preferably a pole inserted into the ground.
3. Method as claimed in any of the foregoing claims, characterized in that the ground is set into vibration while the drop weight is dropped onto said ground.
4. Method as claimed in any of the foregoing claims, characterized in that the drop weight is guided relative to the ground, while its energy is transferred to the ground.
5. Method as claimed in any of the foregoing claims, characterized in that after a compaction of ground with a drop weight a supplementary ground compacting is performed with a larger drop weight and/or a drop weight which has a different, preferably smaller, undersurface and/or with a drop weight having an undersurface of a different form.
6. Method as claimed in any of the foregoing claims, characterized in that measurings are performed on the ground during the compacting by means of measuring means carried into the ground on the guiding means.
7. Method as claimed in any of the foregoing claims, characterized in that not only strokes with a small impact surface having a compacting result at considerable depth over only a small width, but also strokes with a larger impact surface having a compacting result to a smaller depth but over a greater width are applied to each of a plurality of selected positions distributed over the ground at a distance from each other.
8. Apparatus for compacting ground according to the method from any of the foregoing claims, comprising a lifting device and a drop weight, characterized by guiding means anchorable on the ground for guiding said drop weight.
9. Apparatus as claimed in claim 8, characterized in that the guiding means consist of at least one guide member inserted into the ground, preferably a pole inserted into the ground, around which the drop weight is arranged.
10. Apparatus as claimed in either of the claims 8 or 9, characterized in that the vibrating means are fitted on the guiding means.
11. Apparatus as claimed in any of the claims 8-10, characterized in that the drop weight is assembled from a plurality of weight elements which can be coupled to one other.
12. Apparatus as claimed in any of the foregoing claims, characterized by a plurality of weight elements having undersurfaces of different sizes.
13. Apparatus as claimed in any of the claims 8-12, characterized by at least one gripper member which is carried by at least one lifting cable and is movable from a lifting position into a release position, which gripper member can preferably be locked in its lifting position by a locking member which co-operates during lifting of the gripping element to a determined level with a stop member attached to the guiding means to be adjusted into an unlocking position.
14. Apparatus as claimed in any of the claims 8-13, characterized by measuring means arranged on the guiding means for recording the ground reaction occurring during a blow.
15. Apparatus as claimed in any of the claims 8-14, characterized in that at least one resonance plate is arranged at the lower end of the guiding means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK389688A DK389688A (en) | 1987-07-14 | 1988-07-12 | PROCEDURE FOR COMPACTING EARTH AND APPARATUS FOR EXERCISING THE PROCEDURE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8701654 | 1987-07-14 | ||
NL8701654A NL8701654A (en) | 1987-07-14 | 1987-07-14 | METHOD AND APPARATUS FOR COMPACTING SOIL |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0299118A1 true EP0299118A1 (en) | 1989-01-18 |
Family
ID=19850308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87202420A Withdrawn EP0299118A1 (en) | 1987-07-14 | 1987-12-04 | Method and device for compacting soil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0299118A1 (en) |
NL (1) | NL8701654A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0514559A1 (en) * | 1991-05-17 | 1992-11-25 | Kurt Ellmer | Transfer of building load via a steelmember, to the ground, by use of a special ramhead |
EP0672794A1 (en) * | 1994-03-16 | 1995-09-20 | Terramix KG Schotterproduktions-Süd-GmbH & Co. | Deep stratum compacting device |
WO1999009261A1 (en) * | 1997-08-20 | 1999-02-25 | Roxbury Limited | Ground treatment |
GB2364078A (en) * | 2000-06-28 | 2002-01-16 | Roxbury Ltd | Apparatus for a ground treatment device |
GB2366819A (en) * | 1997-08-20 | 2002-03-20 | Roxbury Ltd | Monitoring the degree of compaction during ground treatment |
WO2004079101A1 (en) * | 2003-03-04 | 2004-09-16 | Karl Rainer Massarsch | A method and a device for driving an element |
WO2008106964A1 (en) * | 2007-03-02 | 2008-09-12 | Fractum Aps | Releasable fully automatic mechanical coupling |
CN102021904A (en) * | 2010-12-13 | 2011-04-20 | 杭州杭重工程机械有限公司 | Mechanical and hydraulic integrated forced ramming machine |
WO2011153187A2 (en) * | 2010-06-02 | 2011-12-08 | Geopier Foundation Company, Inc. | Method for ground improvement with hardened inclusions |
CN102635106A (en) * | 2012-04-27 | 2012-08-15 | 中国一冶集团有限公司 | Dynamic compaction buffer damping method of crawler crane |
US8360689B2 (en) | 2009-06-24 | 2013-01-29 | Geopier Foundation Company, Inc. | Method for ground improvement with hardened inclusions |
RU2477769C2 (en) * | 2010-06-22 | 2013-03-20 | Государственное образовательное учреждение высшего профессионального образования "Российский университет дружбы народов" (РУДН) | Device to ram pit |
US8740501B2 (en) | 2009-06-24 | 2014-06-03 | Geopier Foundation Company, Inc. | Apparatus and method for ground improvement |
CN103912652A (en) * | 2014-04-24 | 2014-07-09 | 北京南车时代机车车辆机械有限公司 | Transmission device of mechanical-hydraulic integrated dynamic compactor and transfer case thereof |
US9915050B2 (en) | 2009-06-24 | 2018-03-13 | Geopier Foundation Company, Inc. | Apparatus and method for ground improvement |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1650827A (en) * | 1927-01-27 | 1927-11-29 | Clyde N Friz | Method of compacting earth |
DE871903C (en) * | 1951-06-09 | 1953-03-26 | Hochtief Ag Hoch Tiefbauten | Device for compressing embankments |
US3088385A (en) * | 1960-04-11 | 1963-05-07 | Young Spring & Wire Corp | Road working machine |
US3500940A (en) * | 1968-08-15 | 1970-03-17 | Sprague & Henwood Inc | Free fall hammer apparatus |
NL7415157A (en) * | 1974-11-20 | 1976-05-24 | Int Technische Handelsondernem | Ground compaction process - induces vibrations in earth simultaneously to stamping with punch |
FR2528088A1 (en) * | 1982-06-04 | 1983-12-09 | Solcompact | IMPROVED PROCESS AND DEVICES FOR DYNAMIC COMPACTION OF SOIL |
EP0142198A1 (en) * | 1983-10-25 | 1985-05-22 | Ballast-Nedam Groep N.V. | Method and device for the compaction of soil |
-
1987
- 1987-07-14 NL NL8701654A patent/NL8701654A/en not_active Application Discontinuation
- 1987-12-04 EP EP87202420A patent/EP0299118A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1650827A (en) * | 1927-01-27 | 1927-11-29 | Clyde N Friz | Method of compacting earth |
DE871903C (en) * | 1951-06-09 | 1953-03-26 | Hochtief Ag Hoch Tiefbauten | Device for compressing embankments |
US3088385A (en) * | 1960-04-11 | 1963-05-07 | Young Spring & Wire Corp | Road working machine |
US3500940A (en) * | 1968-08-15 | 1970-03-17 | Sprague & Henwood Inc | Free fall hammer apparatus |
NL7415157A (en) * | 1974-11-20 | 1976-05-24 | Int Technische Handelsondernem | Ground compaction process - induces vibrations in earth simultaneously to stamping with punch |
FR2528088A1 (en) * | 1982-06-04 | 1983-12-09 | Solcompact | IMPROVED PROCESS AND DEVICES FOR DYNAMIC COMPACTION OF SOIL |
EP0142198A1 (en) * | 1983-10-25 | 1985-05-22 | Ballast-Nedam Groep N.V. | Method and device for the compaction of soil |
Non-Patent Citations (1)
Title |
---|
SOVIET INVENTIONS ILLUSTRATED, week 8620, class Q42, 30th May 1986, no. 86-129764/20, Derwent Publications Ltd, London, GB; & SU-A-1 184 902 (UKRORGTEKHSELSTROI) 15-10-1985 * |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0514559A1 (en) * | 1991-05-17 | 1992-11-25 | Kurt Ellmer | Transfer of building load via a steelmember, to the ground, by use of a special ramhead |
EP0672794A1 (en) * | 1994-03-16 | 1995-09-20 | Terramix KG Schotterproduktions-Süd-GmbH & Co. | Deep stratum compacting device |
WO1999009261A1 (en) * | 1997-08-20 | 1999-02-25 | Roxbury Limited | Ground treatment |
GB2345509A (en) * | 1997-08-20 | 2000-07-12 | Roxbury Ltd | Ground treatment |
GB2366819A (en) * | 1997-08-20 | 2002-03-20 | Roxbury Ltd | Monitoring the degree of compaction during ground treatment |
GB2345509B (en) * | 1997-08-20 | 2002-05-08 | Roxbury Ltd | Ground treatment |
GB2366819B (en) * | 1997-08-20 | 2002-06-05 | Roxbury Ltd | Monitoring the degree of compaction achieved during ground treatment |
US6505998B1 (en) | 1997-08-20 | 2003-01-14 | Global Innovations, Inc. | Ground treatment |
EP1431463A1 (en) * | 1997-08-20 | 2004-06-23 | Roxbury Limited | Ground treatment |
GB2364078A (en) * | 2000-06-28 | 2002-01-16 | Roxbury Ltd | Apparatus for a ground treatment device |
GB2364078B (en) * | 2000-06-28 | 2004-06-09 | Roxbury Ltd | Ground treatment |
WO2004079101A1 (en) * | 2003-03-04 | 2004-09-16 | Karl Rainer Massarsch | A method and a device for driving an element |
WO2008106964A1 (en) * | 2007-03-02 | 2008-09-12 | Fractum Aps | Releasable fully automatic mechanical coupling |
US8328470B2 (en) | 2009-06-24 | 2012-12-11 | Geopier Foundation Company, Inc. | Apparatus and method for ground improvement |
US8360689B2 (en) | 2009-06-24 | 2013-01-29 | Geopier Foundation Company, Inc. | Method for ground improvement with hardened inclusions |
US8740501B2 (en) | 2009-06-24 | 2014-06-03 | Geopier Foundation Company, Inc. | Apparatus and method for ground improvement |
US9915050B2 (en) | 2009-06-24 | 2018-03-13 | Geopier Foundation Company, Inc. | Apparatus and method for ground improvement |
WO2011153187A2 (en) * | 2010-06-02 | 2011-12-08 | Geopier Foundation Company, Inc. | Method for ground improvement with hardened inclusions |
WO2011153187A3 (en) * | 2010-06-02 | 2012-04-05 | Geopier Foundation Company, Inc. | Method for ground improvement with hardened inclusions |
RU2477769C2 (en) * | 2010-06-22 | 2013-03-20 | Государственное образовательное учреждение высшего профессионального образования "Российский университет дружбы народов" (РУДН) | Device to ram pit |
CN102021904A (en) * | 2010-12-13 | 2011-04-20 | 杭州杭重工程机械有限公司 | Mechanical and hydraulic integrated forced ramming machine |
CN102635106A (en) * | 2012-04-27 | 2012-08-15 | 中国一冶集团有限公司 | Dynamic compaction buffer damping method of crawler crane |
CN102635106B (en) * | 2012-04-27 | 2015-05-20 | 中国一冶集团有限公司 | Dynamic compaction buffer damping method of crawler crane |
CN103912652A (en) * | 2014-04-24 | 2014-07-09 | 北京南车时代机车车辆机械有限公司 | Transmission device of mechanical-hydraulic integrated dynamic compactor and transfer case thereof |
CN103912652B (en) * | 2014-04-24 | 2017-02-15 | 北京中车重工机械有限公司 | Transmission device of mechanical-hydraulic integrated dynamic compactor and transfer case thereof |
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