CN211773650U - Steel pipe static pile pressing device capable of preventing corrosion and improving pile pressing depth - Google Patents
Steel pipe static pile pressing device capable of preventing corrosion and improving pile pressing depth Download PDFInfo
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- CN211773650U CN211773650U CN202020182996.3U CN202020182996U CN211773650U CN 211773650 U CN211773650 U CN 211773650U CN 202020182996 U CN202020182996 U CN 202020182996U CN 211773650 U CN211773650 U CN 211773650U
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- pile
- pile body
- steel pipe
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- hole
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 238000003825 pressing Methods 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 230000003068 static effect Effects 0.000 title claims abstract description 24
- 230000007797 corrosion Effects 0.000 title claims abstract description 10
- 238000005260 corrosion Methods 0.000 title claims abstract description 10
- 239000002689 soil Substances 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011241 protective layer Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011440 grout Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000009424 underpinning Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a steel pipe static pile pressing device which is corrosion-resistant and can improve the pile pressing depth, comprising a pile driving mechanism, wherein the pile driving mechanism is fixed on a foundation through an anchor rod component, a pile driving hole for leading a pile body into a soil layer is arranged on the foundation, the bottom end of the pile body is a conical pile head, a steel bar hoop is arranged at a corner between the pile head and the pile body, the pile body is a hollow pipe pile, and the wall of the pile body is provided with a plurality of slurry overflow holes; the utility model has the advantages that: through set up steel bar hoop and overfall hole on the pile body, when the pile body was beaten into the soil horizon, can increase the pile-driving degree of depth, and can produce a width for the clearance of d between the pile body of this pile body and soil horizon, can fill up this clearance through pouring water injection mud in the pile body and through the overfall hole for the pile body has increased the protective layer, can play pile body surface anticorrosion effect, has enlarged the stake cross-section moreover, has improved the bearing capacity of pile body.
Description
Technical Field
The utility model belongs to the technical field of foundation engineering, especially, relate to a steel pipe static pile pressing device that is anticorrosive and can improve the pile pressing degree of depth.
Background
The static pressure pile technology has been widely applied to the aspects of building foundation reinforcement, inclination correction, old house reconstruction, dangerous house reinforcement, foundation underpinning and the like since the invention at the beginning of the century. The principle is as follows: the dead load that can be exerted by the building is used as the counter force of pile pressing, the pile sections are pressed into the soil body section by using a jack, and then the piles are connected with the foundation together, so that the aims of improving the bearing capacity of the foundation and controlling the settlement are fulfilled. The construction machine is light and flexible, convenient to construct, small in working area, capable of being constructed indoors, low in energy consumption, free of vibration, noise and pollution and the like, and is widely applied to foundation reinforcement treatment of new and old buildings.
The pile pressing mode can be divided into an anchor rod static pressure pile and a pit type static pressure pile; from the view of pile body materials, the method can be divided into a concrete precast pile and a steel pipe pile. The steel pipe static pressure pile has the characteristics of high strength, convenience in transportation, easiness in pile cutting, capability of adjusting the length at any time according to space and the like, and is popular among technicians. But the steel pipe static pressure pile has a fatal defect, namely the problem of external corrosion resistance is not solved easily; on the other hand, the prior art has limitation on pile pressing depth regardless of the material of the static pressure pile, and the depth is generally about 20 meters and rarely exceeds 30 meters. As shown in fig. 1, because the pile head and the pile side are subjected to the resistance of the soil during the pile pressing process, namely the end resistance and the side resistance, the larger the pile pressing depth is, the larger the side resistance is. The pile can be pressed into a preset bearing layer only when the pile pressing force applied by the jack is greater than the resistance (end resistance + side resistance), when the bearing layer in the foundation is deeper, the large-tonnage jack and the reinforced pile pressing frame must be replaced, the number of anchor rods must be increased, and the pile pressing depth is usually limited by equipment. Therefore, the conventional static pressure pile construction technology has certain limitations.
Disclosure of Invention
An object of the utility model is to overcome the not enough of prior art existence, and provide a steel pipe static pressure stake device that is anticorrosive and can improve the pile pressing degree of depth.
The utility model aims at accomplishing through following technical scheme, this kind is anticorrosive and can improve the steel pipe static pile device of piling degree of depth, including pile driving mechanism, pile driving mechanism passes through the stock subassembly to be fixed on the basis, set up on the basis and supply the pile body to let in to the pile hole on soil layer, the bottom of pile body is the pile body of toper form, corner between pile body and the pile body is equipped with the reinforcing bar hoop, the pile body is hollow tubular pile, has seted up a plurality of grout overflow hole on the wall of its pile body.
Preferably, the slurry overflow holes are distributed at equal intervals in the vertical position of the pile body, and adjacent slurry overflow holes are distributed in a left-right staggered manner in the vertical cross section of the pile body.
Preferably, the diameter D of the pile body is 10 to 15 times the wall thickness D of the steel hoop.
Preferably, two exhaust holes which are symmetrically distributed are arranged on the wall of the pile body.
Preferably, the piling hole is a through hole with the diameter of the lower end larger than that of the upper end.
Preferably, the pile body is of an integrated structure or a sectional structure.
Preferably, a jack is installed in the piling mechanism, and a force application end of the jack is in contact with the top end of the pile body.
The utility model has the advantages that: through set up steel bar hoop and overfall hole on the pile body, when the pile body was beaten into the soil horizon, can increase the pile-driving degree of depth, and can produce a width for the clearance of d between the pile body of this pile body and soil horizon, can fill up this clearance through pouring water injection mud in the pile body and through the overfall hole for the pile body has increased the protective layer, can play pile body surface anticorrosion effect, has enlarged the stake cross-section moreover, has improved the bearing capacity of pile body.
Drawings
Fig. 1 is a front view structural schematic diagram of a conventional steel pipe static pressure pile device.
Fig. 2 is a schematic view of the structure of the steel pipe static pressure pile device of the present invention.
Fig. 3 is the structure schematic diagram of the grouting main view of the steel pipe static pressure pile device of the utility model.
Fig. 4 is an enlarged schematic view of a portion a of fig. 2.
Fig. 5 is a schematic view of the sectional pile structure of the present invention.
The reference numbers in the drawings are respectively: 1. a pile driving mechanism; 2. an anchor assembly; 3. a foundation; 4. a pile body; 5. a soil layer; 6. a steel bar hoop; 7. a grouting pipe; 11. a jack; 31. pile driving holes; 41. pile head; 42. a pile body; 43. a slurry overflow hole; 44. and (4) exhausting holes.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached drawings 2 and 3, the pile driving mechanism 1 comprises a pile driving mechanism 1, wherein the pile driving mechanism 1 is fixed on a foundation 3 through an anchor rod assembly 2, so that the pile driving mechanism 1 cannot shake in the pile driving process; offer on the basis 3 and supply the pile body 4 to let in to the pile hole 31 of soil layer 5, the bottom of pile body 4 is the pile head 41 of toper form, the end that can be appropriate through the end body 41 of toper form eliminates some pile bodies 4 hinders and the side group, the pile body 4 of being convenient for gets into soil layer 5, the corner between pile head 41 and the pile body 42 is fixed with reinforcing bar hoop 6 through the welding mode, pile body 4 is hollow steel pipe pile, has seted up a plurality of overfall hole 43 on its pile body 42's the wall.
As shown in fig. 4, when a steel bar hoop with a wall thickness of D is welded, the diameter of the pile head becomes D +2D, and the diameter of the pile head is increased because the diameter of the pile body is unchanged, so that the pile body does not contact with the soil body in the pile pressing process, and the resistance on the periphery of the pile temporarily disappears. Although the stress area of the pile head is increased, the resistance of the pile head is increased slightly and is a fixed value, and the pile head is not influenced by the depth of the pile; and increased the pile-pressing degree of depth, original pile-pressing power must overcome simultaneously and hinder can only with the pile-pressing into the ground under the condition that holds with the side, and the pile-pressing condition is promptly: f is more than or equal to the P end plus the P side; after this scheme of adoption, pile pressing power is only hindered to overcome the end and just can be pressed the stake into the ground, promptly: f is more than or equal to the P end. Under the condition of no side resistance, the pile can be pressed deeper by the same equipment and the same pile pressing force, and the problem of insufficient pile pressing force of the deep pile is solved.
In order to enable cement paste to uniformly flow into a gap d between the pile body and a soil layer from the pile body 42, the grout overflow holes 43 are distributed at equal intervals in the vertical position of the pile body 42, the interval distance is 2 meters, the adjacent grout overflow holes 43 are distributed in a left-right staggered mode on the vertical cross section of the pile body 42, and the diameter of each grout overflow hole 43 is 2 centimeters. When the isostatic pressing pile is pressed to a preset depth, M30 cement mortar or cement paste is poured into the pile body 4 until the inner and outer slurry of the pile body 4 are full; flows into the gap on the outer side of the pile body 4 through the grout overflow hole 43, wraps the pile body 4 inside and outside, and can form a mortar protective layer with the thickness d on the outer side of the pile body 4 after grout is solidified, so that the pile body 4 is prevented from directly contacting with the hole wall, and a certain anticorrosion effect is achieved; meanwhile, after the slurry is solidified, the lateral resistance is recovered, and the bearing capacity of the static pressure pile is greatly improved; and the stress area is increased, and the frictional resistance is much larger than the frictional resistance between the original steel pipe and the soil body.
The wall of the pile body 42 is provided with a plurality of grout overflow holes 43, and the strength and the integrity of the foundation are also improved. When cracks and cavities (common to loess foundations) exist in the foundation, the slurry flows over the gaps or the holes in the foundation to fill and patch the gaps or the holes, so that the strength and the integrity of the foundation are improved.
For proper arrangement of the reinforcement stirrup 6 on the shaft 42, the diameter D of the shaft 42 is 10 to 15 times the wall thickness D of the reinforcement stirrup 6.
When a guide hole is formed, namely before piling, a deep hole is drilled in a soil layer, and the diameter of the deep hole is smaller than that of a pile body, at the moment, if the pile body 4 is directly driven into the soil layer, air pressure can be generated between the soil layer and the bottom end of the pile body 4, so that the pile body 4 cannot be driven into the soil layer smoothly, two exhaust holes 44 which are symmetrically distributed are formed in the wall of the pile head 41, the air pressure generated between the soil layer and the bottom end of the pile body 4 can be discharged out smoothly through the exhaust holes 44, and the air flow rate in the exhaust process can be more uniform due to the symmetrical arrangement, so that the low pile head end of the pile body 4 is prevented from being stressed unevenly.
The pile driving hole 31 is a through hole with a diameter of the lower end larger than that of the upper end, so that after the pile driving is completed and concrete is poured and formed in the pile driving hole 31, the hole cannot be loosened, and the concrete is prevented from being separated from the foundation 3.
The pile body 4 is of an integral structure or a sectional structure, such as a sectional structure: the steel bar hoops 6 are welded among all the pile bodies, as shown in the attached drawing 5, the effect of the steel bar hoops 6 can be achieved, and the strength among the pile bodies can be enhanced.
A jack 11 is arranged in the piling mechanism 1, and the force application end of the jack 11 is contacted with the top end of the pile body 4.
The utility model discloses a theory of operation does: firstly, putting the pile body 4 into the pile driving hole 31 and contacting with the soil layer 5; then, the pile body 4 is driven into the soil layer 5 under the action of a jack 11 in the pile driving mechanism 1, if the pile body 4 is of a sectional structure, when the pile body 4 does not completely enter the soil layer, the other section of the pile body 4 is welded and formed, and meanwhile, a steel bar hoop 6 is welded; finally, when pile 4 is pressed to a predetermined depth, M30 cement mortar or cement paste is poured into pile 4 through grouting pipe 7 until the inside and outside of pile 4 are full of cement paste.
The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.
Claims (7)
1. The utility model provides an anticorrosive steel pipe static pile device that can improve pile-driving depth, includes pile driving mechanism (1), pile driving mechanism (1) is fixed on basis (3) through stock subassembly (2), its characterized in that: offer on basis (3) and supply pile body (4) to let in pile hole (31) to soil layer (5), the bottom of pile body (4) is pile head (41) of toper form, corner between pile head (41) and pile body (42) is equipped with reinforcing bar hoop (6), pile body (4) are hollow tubular pile, have seted up a plurality of overfall hole (43) on the wall of its pile body (42).
2. The steel pipe static pile device capable of preventing corrosion and improving pile pressing depth according to claim 1, wherein: the slurry overflow holes (43) are distributed at equal intervals in the vertical position of the pile body (42), and the adjacent slurry overflow holes (43) are distributed in a left-right staggered manner in the vertical cross section of the pile body (42).
3. The steel pipe static pile device capable of preventing corrosion and improving pile pressing depth according to claim 1, wherein: the diameter D of the pile body (42) is 10-15 times of the wall thickness D of the steel hoop (6).
4. The steel pipe static pile device capable of preventing corrosion and improving pile pressing depth according to claim 1, wherein: two exhaust holes (44) which are symmetrically distributed are arranged on the wall of the pile head (41).
5. The steel pipe static pile device capable of preventing corrosion and improving pile pressing depth according to claim 1, wherein: the piling hole (31) is a through hole with the diameter of the lower end larger than that of the upper end.
6. The steel pipe static pile device capable of preventing corrosion and improving pile pressing depth according to claim 1, wherein: the pile body (4) is of an integrated structure or a sectional structure.
7. The steel pipe static pile device capable of preventing corrosion and improving pile pressing depth according to claim 1, wherein: a jack (11) is installed in the piling mechanism (1), and the force application end of the jack (11) is in contact with the top end of the pile body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020182996.3U CN211773650U (en) | 2020-02-19 | 2020-02-19 | Steel pipe static pile pressing device capable of preventing corrosion and improving pile pressing depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020182996.3U CN211773650U (en) | 2020-02-19 | 2020-02-19 | Steel pipe static pile pressing device capable of preventing corrosion and improving pile pressing depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211773650U true CN211773650U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020182996.3U Expired - Fee Related CN211773650U (en) | 2020-02-19 | 2020-02-19 | Steel pipe static pile pressing device capable of preventing corrosion and improving pile pressing depth |
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| Country | Link |
|---|---|
| CN (1) | CN211773650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106972A (en) * | 2021-03-03 | 2021-07-13 | 如皋市中成管桩机械有限公司 | Full-hydraulic static-pressure double-pipe composite bottom-expanding pile machine |
-
2020
- 2020-02-19 CN CN202020182996.3U patent/CN211773650U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106972A (en) * | 2021-03-03 | 2021-07-13 | 如皋市中成管桩机械有限公司 | Full-hydraulic static-pressure double-pipe composite bottom-expanding pile machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
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| CF01 | Termination of patent right due to non-payment of annual fee |