CN218562314U - Consider slip casting steel-pipe pile of anti floating and resistance to compression - Google Patents
Consider slip casting steel-pipe pile of anti floating and resistance to compression Download PDFInfo
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- CN218562314U CN218562314U CN202223032135.5U CN202223032135U CN218562314U CN 218562314 U CN218562314 U CN 218562314U CN 202223032135 U CN202223032135 U CN 202223032135U CN 218562314 U CN218562314 U CN 218562314U
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Abstract
The utility model provides a compromise slip casting steel-pipe pile of anti-floating and resistance to compression, slip casting steel-pipe pile includes resistance to plucking reinforcing bar, centering reinforcing bar group and steel pipe, the steel pipe sets up in drilling and the section that exposes on steel pipe upper portion is one and is located the outside of drilling, resistance to plucking reinforcing bar sets up in inside and set up many centering reinforcing bar groups along its self length direction interval of steel pipe, the extension section of resistance to plucking reinforcing bar lower part is located the outside of steel pipe lower extreme, the upper portion of resistance to plucking reinforcing bar sets up anchoring reinforcing bar group, anchoring reinforcing bar group is located the outside of steel pipe upper end. The utility model discloses a slip casting steel-pipe pile has resistance to compression bearing capacity, constructs the building to small-size underground such as basement or secret fire water pool that the bearing capacity requirement is not high, can do the resistance to compression stake that undertakes building load pressure concurrently, its performance of make full use of. Through the anchoring of anchoring reinforcing bar group and basement bottom plate, can effectively solve the connection problem of steel pipe and basement bottom plate.
Description
Technical Field
The utility model relates to a slip casting steel-pipe pile technical field, concretely relates to compromise slip casting steel-pipe pile of anti superficial and resistance to compression.
Background
Along with the acceleration of urbanization process, more and more underground spaces are utilized, and the situation that the underground water level is higher than the basement bottom elevation is more and more existed in the simple basement or the high-rise building with the basement, the anti-floating problem of the basement is gradually highlighted. The current commonly used solutions mainly use traditional cast-in-place piles, precast piles and anti-floating anchors. The traditional cast-in-place pile has a large diameter, needs large equipment such as a long spiral drilling rig and a rotary drilling rig, is greatly influenced by equipment or construction conditions, and is high in cost. The precast pile has a soil squeezing effect, and can generate serious disturbance to the surrounding soil body to cause a floating pile; meanwhile, due to the influence of geological conditions and construction processes, pile sinking failure and pile breakage of the precast pile are easy to occur. The anti-floating anchor rod needs to be provided with a tensioning hole on a basement bottom plate, and pre-stressed tensioning is carried out on anti-pulling steel bars, so that the process crossing condition exists, the construction process is complex, and the construction period is long.
In conclusion, a grouting steel pipe pile with both anti-floating and anti-compression functions is urgently needed to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a compromise slip casting steel-pipe pile of anti superficial and resistance to compression aims at simplifying construction equipment, reduces construction cost, avoids leaving the stretch-draw hole in the basement bottom plate simultaneously, and concrete technical scheme is as follows:
the utility model provides a compromise slip casting steel-pipe pile of anti-floating and resistance to compression, slip casting steel-pipe pile includes resistance to plucking reinforcing bar, centering reinforcing bar group and steel pipe, the steel pipe sets up in the drilling and the steel pipe upper portion expose the section one and be located the outside of drilling, resistance to plucking reinforcing bar sets up in the steel pipe inside and sets up many centering reinforcing bar groups along its self length direction interval, the extension section of resistance to plucking reinforcing bar lower part is located the outside of steel pipe lower extreme, the upper portion of resistance to plucking reinforcing bar sets up anchoring reinforcing bar group, anchoring reinforcing bar group is located the outside of steel pipe upper end.
Preferably, in the above technical solution, the anchoring reinforcement group includes an exposed section two at the upper portion of the uplift reinforcement and at least one additional reinforcement, the additional reinforcement is welded to the exposed section two, and the exposed section one, the exposed section two and the additional reinforcement are anchored in the concrete poured bottom plate.
Preferably, in the above technical solution, the additional steel bar is L-shaped; in the anchoring steel bar group, a plurality of pieces of additional steel bars are uniformly arranged on the periphery of the exposed section; or after the exposed section is bent into an L shape, the second exposed section and the plurality of additional steel bars are uniformly distributed along the circumferential direction.
Preferably, grouting liquid is filled between the steel pipe and the drill hole and between the steel pipe and the anti-pulling steel bar.
Preferably, the net spacing between the anti-pulling steel bars and the inner wall of the steel pipe is not less than 25mm.
Preferably in the above technical solution, the centering steel bar group includes a plurality of centering steel bar single pieces uniformly distributed along the circumferential direction, and an end of each centering steel bar single piece is welded to the surface of the anti-pulling steel bar.
Preferably, the distance between the adjacent steel bar groups in the pair is 1500-2500 mm.
Preferably among the above technical scheme, the extension length that is located the outside of steel pipe lower extreme is no less than 1m.
Preferably, the distance from the lower end of the anti-pulling steel bar to the bottom of the drill hole is not less than 0.5m.
Preferably, in the above technical scheme, the height of the weld between the additional steel bar and the anti-pulling steel bar is not less than 0.3 time of the diameter of the anti-pulling steel bar; when double-sided welding is adopted, the lap length between the additional reinforcing steel bars and the anti-pulling reinforcing steel bars is not less than 5 times of the diameter of the anti-pulling reinforcing steel bars; when single-side welding is adopted, the lap length between the additional reinforcing steel bars and the anti-pulling reinforcing steel bars is not less than 10 times of the diameter of the anti-pulling reinforcing steel bars.
Use the technical scheme of the utility model, following beneficial effect has:
the grouting steel pipe pile of the utility model has simple hole forming process, low equipment requirement, flexible construction and construction period saving; the grouting steel pipe piles can be uniformly paved on the whole basement, so that the basement bottom plate is uniformly stressed, the beam and slab reinforcement of the basement bottom plate is small, and the cost is saved. Construction is carried out before the basement bottom plate, pre-stressed tension holes are prevented from being reserved on the bottom plate, process intersection is reduced, and construction progress is improved.
The grouting steel pipe pile has compression-resistant bearing capacity, can be used as a compression-resistant pile bearing the building load pressure for small underground structures such as basements or underground fire pools with low bearing capacity requirements, and fully utilizes the performance of the compression-resistant pile. Through the anchoring of anchoring reinforcing bar group and basement bottom plate, can effectively solve the connection problem of steel pipe and basement bottom plate. The utility model discloses a slip casting steel-pipe pile can be applicable to all soil bodies and rock mass, and the single pile bearing capacity is lower, conveniently detects.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic overall structure diagram of a grouting steel pipe pile;
FIG. 2 isbase:Sub>A schematic view of section A-A of FIG. 1;
the method comprises the following steps of 1, grouting of the steel pipe pile, 2, uplift steel bars, 2.1, extension sections, 2.2, exposure sections II and 3, centering of steel bar groups, 4, steel pipes, 4.1, exposure sections I and 5, a bottom plate, 6 and additional steel bars.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter, giving preferred embodiments of the invention. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1:
referring to fig. 1, a grouting steel pipe pile considering both floating resistance and compression resistance, the grouting steel pipe pile 1 includes anti-pulling steel bars 2, centering steel bar groups 3 and steel pipes 4, the steel pipes 4 are disposed in a borehole, an exposed section one 4.1 of the upper portion of each steel pipe 4 is located outside the borehole, the anti-pulling steel bars 2 are disposed inside the steel pipes 4 and are provided with a plurality of centering steel bar groups 3 at intervals along the length direction of the anti-pulling steel bars 2, an extension section 2.1 of the lower portion of each anti-pulling steel bar 2 is located outside the lower end of each steel pipe 4 (i.e., the lower portion of each anti-pulling steel bar extends out of the corresponding steel pipe, and the extension section refers to a section located outside the corresponding steel pipe), an anchoring steel bar group is disposed on the upper portion of each anti-pulling steel bar 2, and the anchoring steel bar group is located outside the upper end of each steel pipe 4.
Specifically, the anchoring steel bar group comprises an exposed section II 2.2 at the upper part of the uplift steel bar 2 and at least one additional steel bar 6, the additional steel bar 6 is welded on the exposed section II, and the exposed section I4.1, the exposed section II 2.2 and the additional steel bar 6 are anchored in a concrete pouring bottom plate 5. The exposed section I4.1, the exposed section II 2.2 and the additional steel bar 6 are anchored in the bottom plate, and the grouting steel pipe pile 1 and the bottom plate 5 are well connected.
Preferably, the additional reinforcing steel bars 6 are L-shaped; in the anchoring steel bar group, the second exposed section is linear, and a plurality of additional steel bars 6 are uniformly arranged on the periphery of the second exposed section; in addition, after the exposed section is bent into an L shape, the second exposed section and the plurality of additional steel bars 6 are uniformly distributed along the circumferential direction. In this embodiment, a second arrangement mode is preferred, the second exposed section is bent, and then the additional steel bar 6 is welded on the second exposed section, in this embodiment, the additional steel bar 6 is one piece and is symmetrically arranged with the second L-shaped exposed section. Realize through the anchor reinforcing bar group and anchor between 5 with the bottom plate, solved the connection problem between slip casting steel-pipe pile and the bottom plate.
Specifically, in practical application, grouting liquid is filled between the steel pipe 4 and the drilled hole and between the steel pipe 4 and the anti-pulling steel bar 2.
In this embodiment, preferably, the clear distance between the anti-pulling steel bar 2 and the inner wall of the steel pipe 4 is not less than 25mm, and specifically, a certain distance is separated between the anti-pulling steel bar 2 and the inner wall of the steel pipe 4 by the aid of the centering steel bar sets 3, so that the whole anti-pulling steel bar is fixed in the middle, and the requirement on the thickness of the protective layer of the anti-pulling steel bar is met.
Referring to fig. 2, the centering steel bar group 3 includes a plurality of centering steel bar single pieces uniformly distributed along the circumferential direction, preferably, one centering steel bar group includes at least two centering steel bar single pieces, and more preferably, at least three centering steel bar single pieces; in this embodiment, centering reinforcing bar singleton is circular-arc, the tip and the resistance to plucking reinforcing bar surface welding of centering reinforcing bar singleton, the reinforcing bar diameter of centering reinforcing bar singleton is not less than 8mm.
In the embodiment, the distance between the reinforcement bar groups 3 in adjacent pairs is preferably 1500-2500 mm.
More preferably, as shown in fig. 1, the length of the extension section 2.1 located outside the lower end of the steel pipe 4 is not less than 1m, and the extension section can improve the bond property between the steel pipe pile and cement paste and improve the uplift bearing capacity of the steel pipe pile.
Preferably, the distance from the lower end of the anti-pulling steel bar 2 to the bottom of the drill hole is not less than 0.5m.
In practical application, the height of a welding seam between the additional steel bar 6 and the anti-pulling steel bar 2 is not less than 0.3 time of the diameter of the anti-pulling steel bar; when double-sided welding is adopted, the lap length between the additional reinforcing steel bar 6 and the anti-pulling reinforcing steel bar 2 is not less than 5 times of the diameter of the anti-pulling reinforcing steel bar; when single-side welding is adopted, the lap length between the additional reinforcing steel bar 6 and the anti-pulling reinforcing steel bar 2 is not less than 10 times of the diameter of the anti-pulling reinforcing steel bar.
In the preferred embodiment, the single piece of the centering steel bar is made of HPB300 or HRB400 steel bars, and the anti-pulling steel bar is made of common HRB400 steel bars. The specification and model of the steel pipe 4 and the diameter of the uplift steel bar can be calculated and determined according to specific conditions, and the grouting steel pipe pile can be constructed by adopting a small-diameter mechanical drilling machine.
The technical scheme of the embodiment is specifically as follows:
the grouting steel pipe pile hole forming and grouting process comprises the following steps: 1) Selecting proper mechanical pore-forming according to the geological condition, and judging the geological condition of a rock-soil layer when coring is required; 2) Pile diameter (i.e., borehole diameter) tolerance ± 50mm; 3) The allowable deviation of the verticality is less than or equal to 1 percent; 4) The allowable deviation of the pile position is less than or equal to 50mm; 5) When the drill hole enters or passes through the easily-collapsible Kong Deceng, drilling hole forming construction by adopting a casing protection wall; 6) The drilling is preferably carried out by adopting mechanical dry operation hole forming construction, so that the hole forming is prevented from collapsing soil or the pit wall soil is softened by soaking water in wet construction.
The manufacturing and mounting process of the steel pipe and the anti-pulling steel bar comprises the following steps: 1) Straightening and removing dirty rust before the anti-pulling steel bar is used; welding the additional steel bars with the anti-pulling steel bars by adopting double-sided welding; binding 2 grouting pipes with the anti-pulling steel bars together respectively, and sealing the grouting holes and the ends of the high-pressure grouting pipes for secondary grouting; 2) The steel pipe and the anti-pulling steel bar are kept fixed in relative positions by adopting a hanging or supporting method, and the position and the height during grouting are ensured.
Grouting process of the steel pipe pile: and removing residual soil in the holes before grouting. The steel pipe grouting adopts a secondary grouting process, wherein the first grouting adopts cement paste or cement mortar with the strength grade of more than or equal to M30, and the second grouting adopts cement paste with the strength grade of more than or equal to M30. And performing integral construction of the bottom plate after the construction of all the grouting steel pipe piles is completed.
By applying the technical scheme of the embodiment, the effects are as follows:
by adopting the grouting steel pipe pile of the embodiment for anti-floating, large-scale equipment such as a rotary drilling rig can be avoided, the manufacturing cost is saved, the construction is convenient, and the construction period is saved; compared with an anti-floating anchor rod, the grouting steel pipe pile has anti-pressure bearing capacity, can be used as an anti-pressure pile bearing building load pressure, and fully utilizes performance; meanwhile, the anchoring steel bar group is anchored with the basement bottom plate, so that the problem of connection between the steel pipe and the basement bottom plate is solved.
By adopting the secondary grouting process, the pile body grouting body is compact, has the functions of permeating, reinforcing and encrypting surrounding soil, and can improve the bearing capacity of the pile body grouting body.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a compromise slip casting steel-pipe pile of anti-floating and resistance to compression, its characterized in that, slip casting steel-pipe pile (1) is including resistance to plucking reinforcing bar (2), centering reinforcing bar group (3) and steel pipe (4), steel pipe (4) set up in drilling and exposed section one (4.1) on steel pipe (4) upper portion are located the outside of drilling, resistance to plucking reinforcing bar (2) set up in steel pipe (4) inside and set up many centering reinforcing bar groups (3) along its self length direction interval, extension section (2.1) of resistance to plucking reinforcing bar (2) lower part are located the outside of steel pipe (4) lower extreme, the upper portion of resistance to plucking reinforcing bar (2) sets up the anchor reinforcing bar group, the anchor reinforcing bar group is located the outside of steel pipe (4) upper end.
2. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 1, wherein the anchoring steel bar group comprises a second exposed section (2.2) at the upper part of the uplift steel bar (2) and at least one additional steel bar (6), the additional steel bar (6) is welded on the second exposed section, and the first exposed section (4.1), the second exposed section (2.2) and the additional steel bar (6) are anchored in the concrete poured bottom plate (5).
3. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 2, wherein the additional steel bars (6) are L-shaped; in the anchoring steel bar group, a plurality of pieces of additional steel bars (6) are uniformly arranged on the periphery of the second exposed section (2.2); or after the exposed section is bent into an L shape, the second exposed section (2.2) and a plurality of additional reinforcing steel bars (6) are uniformly distributed along the circumferential direction.
4. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 1, wherein grouting liquid is filled between the steel pipe (4) and the drilled hole and between the steel pipe (4) and the uplift steel bar (2).
5. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 1, wherein the clear distance between the uplift steel bars (2) and the inner wall of the steel pipe (4) is not less than 25mm.
6. The grouting steel pipe pile with both floating resistance and compression resistance as claimed in claim 1, wherein the centering steel bar group (3) comprises a plurality of centering steel bar single pieces uniformly distributed along the circumferential direction, and the ends of the centering steel bar single pieces are welded with the surface of the uplift steel bar.
7. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 1, wherein the distance between adjacent steel bar groups (3) in a pair is 1500-2500 mm.
8. The grouting steel pipe pile with both anti-floating and anti-compression functions as claimed in claim 1, characterized in that the length of the extension section (2.1) positioned outside the lower end of the steel pipe (4) is not less than 1m.
9. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 1, wherein the distance from the lower end of the anti-pulling steel bar (2) to the bottom of the drill hole is not less than 0.5m.
10. The grouting steel pipe pile with both floating resistance and compression resistance according to claim 2, wherein the height of the weld joint between the additional steel bar (6) and the anti-pulling steel bar (2) is not less than 0.3 times of the diameter of the anti-pulling steel bar; when double-sided welding is adopted, the lap joint length between the additional reinforcing steel bar (6) and the anti-pulling reinforcing steel bar (2) is not less than 5 times of the diameter of the anti-pulling reinforcing steel bar; when single-side welding is adopted, the lap length between the additional reinforcing steel bar (6) and the anti-pulling reinforcing steel bar (2) is not less than 10 times of the diameter of the anti-pulling reinforcing steel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223032135.5U CN218562314U (en) | 2022-11-15 | 2022-11-15 | Consider slip casting steel-pipe pile of anti floating and resistance to compression |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223032135.5U CN218562314U (en) | 2022-11-15 | 2022-11-15 | Consider slip casting steel-pipe pile of anti floating and resistance to compression |
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| CN218562314U true CN218562314U (en) | 2023-03-03 |
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| CN202223032135.5U Active CN218562314U (en) | 2022-11-15 | 2022-11-15 | Consider slip casting steel-pipe pile of anti floating and resistance to compression |
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