CN220725062U - Anti-floating pile structure for foundation - Google Patents

Abstract

The utility model relates to a pile structure for foundation, which comprises: the pile comprises a pile body, an inner cavity surrounded by the inner side wall of the pile body, inner core ribs embedded in the pile body, outer core ribs fixed on the pile body and fixed with the inner core ribs, a supporting plate arranged in the inner cavity, embedded ribs fixed on the top of the supporting plate and circumferentially arranged, hooping connected with the embedded ribs and arranged at intervals, and a micro-expansion concrete layer poured in the inner cavity; according to the uplift pile structure for the foundation, the reinforcement cage formed by the supporting plates, the embedded bars and the stirrups is used for improving the stability of the pile body after piling, so that the uplift performance is improved; through pouring the micro-expansive concrete layer to the inner cavity, rely on the expansion that the micro-expansive concrete produced in the hydration period, the level is exerted to the certain precompression of pile body to further realize the effect of resistance to plucking, make this device be difficult to be pulled out, improved the security of building, the practicality is strong, is worth promoting.

Description

Anti-floating pile structure for foundation

Technical Field

The utility model belongs to the technical field of pile foundation construction, and particularly relates to a uplift pile structure for a foundation.

Background

The uplift pile is widely applied to the uplift resistance of large basements, the uplift resistance of high-rise buildings, the uplift resistance of offshore wharf platforms, anchor pile foundations of suspension bridges and cable-stayed bridges, pile foundations of large ship dock bottom plates, anchor pile foundations in static load test piles and the like. The anti-pulling pile is an anti-pulling device buried on a pile foundation and mainly aims to prevent the pile foundation from being pulled out so as to ensure the stability of a building.

At present, after the common hollow anti-floating pile is driven into the foundation, only the friction resistance in the vertical direction is received, and the fit effect in the horizontal direction is not available, so that the anti-floating effect of the hollow anti-floating pile is poor, the hollow anti-floating pile is easy to pull out, the safety of a building is greatly influenced, and the practicability of the hollow anti-floating pile is reduced.

Disclosure of Invention

The utility model aims to overcome the defects that the hollow anti-pulling pile in the prior art has poor anti-pulling effect and is easy to pull out to influence the safety of a building, and provides an anti-pulling pile structure for a foundation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a uplift pile structure for a foundation, comprising:

pile body, by the inner chamber that the pile body inner wall encloses, inlay establish the inner core muscle in the pile body, fix on the pile body and with the outer core muscle that inner core muscle is fixed mutually, set up the layer board of inner chamber, fix the pre-buried muscle that layer board top and circumference set up, connect the stirrup that pre-buried muscle and interval set up and pour the little expansion concrete layer of inner chamber.

Optimally, it still includes seting up sleeve cavity, the plug-in of seting up of pile body top and circumference setting are in sleeve intracavity is in outer muscle groove, outer oblique guide face and interior muscle groove in the sleeve, outer oblique guide face is by last diameter convergent down, outer muscle groove links to each other with the one end of outer oblique guide face major diameter, interior muscle groove links to each other with the one end of outer oblique guide face minor diameter, outer core muscle is fixed in outer muscle inslot, interior muscle inslot is fixed to the inner core muscle.

Optimally, the pile further comprises a supporting block integrally connected to the top of the inner core rib, an inner inclined guide surface arranged on the outer side of the supporting block and a sleeve plate fixed to the top of the pile body, wherein the inner inclined guide surface is matched with the outer inclined guide surface.

Preferably, the diameter of the pallet is smaller than the diameter of the lumen.

Optimally, the length of the embedded bars inserted into the inner cavity is not less than five times of the outer diameter of the pile body.

Optimally, the diameter of the outer core rib is smaller than that of the outer rib groove, and the diameter of the inner core rib is smaller than that of the inner rib groove.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

according to the uplift pile structure for the foundation, the supporting plates, the embedded bars and the stirrups are arranged in the inner cavity of the pile body, the embedded bars are gathered by the stirrups, the embedded bars are prevented from scattering to the periphery, and the stability of the pile body after piling is improved through the steel reinforcement framework formed by the supporting plates, the embedded bars and the stirrups, so that the uplift performance is improved; through pouring the micro-expansive concrete layer to the inner cavity, rely on the expansion that the micro-expansive concrete produced in the hydration period, the level is exerted to the certain precompression of pile body to further realize the effect of resistance to plucking, make this device be difficult to be pulled out, improved the security of building, the practicality is strong, is worth promoting.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the a-a side of the present utility model;

FIG. 3 is a cross-sectional view of the utility model at the b-b side;

FIG. 4 is an enlarged view of the utility model at A in FIG. 1;

FIG. 5 is an enlarged view of the utility model at B in FIG. 1;

FIG. 6 is a schematic view of the pile body according to the present utility model;

FIG. 7 is a schematic view of the structure of the sleeve of the present utility model;

reference numerals illustrate:

1. a pile body;

2. an inner cavity;

3. a sleeve cavity;

4. a sleeve;

5. an outer rib groove;

6. an outer inclined guide surface;

7. an inner rib groove;

8. an outer core rib;

9. an inner core rib;

10. a support block;

11. an inner inclined guide surface;

12. a sleeve plate;

13. a supporting plate;

14. pre-burying ribs;

15. stirrups;

16. a micro-expansive concrete layer.

Detailed Description

The utility model will be further described with reference to examples of embodiments shown in the drawings.

Referring to fig. 1, a structural schematic diagram of a uplift pile structure for a foundation of the present utility model is shown, which comprises a pile body 1, an inner cavity 2, a sleeve cavity 3, a sleeve 4, an outer rib 5, an outer inclined guide surface 6, an inner rib groove 7, an outer core rib 8, an inner core rib 9, a supporting block 10, an inner inclined guide surface 11, a sleeve plate 12, a supporting plate 13, an embedded rib 14, a stirrup 15 and a micro-expansive concrete layer 16.

The pile body 1 is formed by pouring concrete, the concrete refers to a general term of engineering composite materials which are formed by cementing glue collecting materials into a whole by cementing materials, cement is used as cementing materials, sand and stone are used as aggregates, and the cement concrete is obtained by mixing the cement concrete with water (which can contain additives and admixture) according to a certain proportion and stirring. As shown in fig. 6, the pile body 1 is a hollow cylindrical structure, the inner side wall of the pile body 1 forms an inner cavity 2, and the inner cavity 2 is used for subsequent pouring of the reinforcement cage. The top of pile body 1 is provided with a plurality of groups of sleeve cavities 3 for accommodating sleeves 4, as shown in fig. 2 and 3, and the circumferences of sleeve cavities 3 are arranged at the top of pile body 1 (in this embodiment, eight groups of sleeve cavities 3 are provided).

As shown in fig. 7, the sleeve 4 is schematically shown in the structure, the number of the sleeves 4 is the same as the number of the sleeve cavities 3, and after the sleeves 4 are poured in the sleeve cavities 3, the upper surfaces of the sleeves 4 protrude from the upper surface of the pile body 1 by a distance for subsequent installation of the sleeve plate 12. The outer rib groove 5 and the inner rib groove 7 are formed in the sleeve 4 in the vertical direction, and the state of the sleeve 4 shown in fig. 7 is a state diagram when the sleeve 4 is normally poured. The outer rib groove 5 is used for fixing the outer core rib 8, the inner rib groove 7 is used for fixing the inner core rib 9, and the diameter of the outer rib groove 5 is larger than that of the inner rib groove 7.

An outer inclined guide surface 6 is provided in the sleeve 4 and serves to connect the outer rib groove 5 and the inner rib groove 7. The outer inclined guide surface 6 is gradually reduced from top to bottom, one end with a larger diameter of the outer inclined guide surface 6 is connected with the bottom of the outer rib groove 5, one end with a smaller diameter of the outer inclined guide surface 6 is connected with the top of the inner rib groove 7, and the outer inclined guide surface 6 is used for guiding the inner core ribs 9.

As shown in fig. 4 and 5, the top of the inner core rib 9 is integrally connected with a supporting block 10, and an inner inclined guide surface 11 is arranged on the outer side of the supporting block 10, and the inner inclined guide surface 11 is matched with the outer inclined guide surface 6. The diameter of the inner core rib 9 is smaller than that of the inner rib groove 7, during actual processing, the inner core rib 9 is inserted into the inner rib groove 7, the inserted inner core rib 9 is guided under the action of the outer inclined guide surface 6, the inner core rib 9 is ensured to be inserted more smoothly, and then cement mortar is poured into gaps between the inner rib groove 7 and the inner core rib 9.

The outer core rib 8 is inserted into the outer rib groove 5 and abuts against the top of the bearing block 10, the diameter of the outer core rib 8 is smaller than that of the outer rib groove 5, and cement mortar is filled in a gap between the outer core rib 8 and the outer rib groove 5. As shown in fig. 5, the sleeve plate 12 is fixed on the top of the pile body 1, the sleeve plate 12 is an annular steel plate with the thickness greater than 5mm, the sleeve plate 12 is fixed on the top of the pile body 1 in a screw fastening mode, and a circular groove matched with the sleeve 4 is formed in the sleeve plate 12 and used for avoiding the position of the sleeve 4.

The supporting plate 13 is a round steel plate with the thickness of 4-5mm, and the diameter of the supporting plate 13 is slightly smaller than that of the inner cavity 2. As shown in fig. 2 and 3, the embedded ribs 14 are fixed on the top of the supporting plate 13 in a welding manner, and are circumferentially distributed on the supporting plate 13. The stirrup 15 is annular for connect multiunit pre-buried muscle 14, avoid pre-buried muscle 14 to take place to rock, as shown in fig. 1, stirrup 15 interval sets up in vertical direction. The length of the embedded ribs 14 inserted into the inner cavity 2 is not less than five times of the outer diameter of the pile body 1, so that the stability of the pile body 1 is improved. The supporting plate 13, the embedded bars 14 and the stirrups 15 are arranged in the inner cavity 2 of the pile body 1, and the embedded bars 14 are gathered by the stirrups 15, so that the embedded bars 14 are prevented from being scattered to the periphery. Through the reinforcement cage that layer board 13, pre-buried muscle 14 and stirrup 15 are constituteed, improve the steadiness after pile body 1 pile, improve the resistance to plucking performance (reinforcement cage's setting has improved the weight of pile body 1 structure, moreover under the gelatinization effect of little expansion concrete layer 16 for reinforcement cage and pile body 1 link into a whole).

After the supporting plate 13, the embedded ribs 14 and the stirrups 15 are installed, a micro-expansion concrete layer 16 needs to be poured into the inner cavity 2, the strength of the micro-expansion concrete layer 16 is not lower than C40 (micro-expansion concrete refers to that a certain expansion agent such as calcium sulfoaluminate, calcium oxide-calcium sulfoaluminate, magnesium oxide and the like is added into common concrete, so that the concrete can expand to a certain extent under the action of the expansion agent during hydration, the shrinkage of the concrete is compensated, the aim of preventing and curing concrete cracks and improving the concrete performance is achieved, and C40 refers to that the standard value of the compressive strength of a concrete cube is 40 MPa). By pouring the micro-expansive concrete layer 16 into the inner cavity 2, a certain pre-pressure is horizontally applied to the pile body 1 by virtue of expansion generated during hydration of the micro-expansive concrete, so that the pulling-resistant effect is realized (the vertical friction force between the contact surface of the pile body 1 and the foundation can also realize a certain pulling-resistant effect).

The utility model relates to a construction flow of a uplift pile structure for a foundation, which comprises the following steps:

firstly, penetrating an inner core rib 9 into a sleeve 4, pouring cement mortar into gaps between an inner rib groove 7 and the inner core rib 9 for sealing the inner rib groove 7 and the inner core rib 9, pouring the sleeve 4, the inner core rib 9 and a pile body 1 together, inserting an outer core rib 8 into the sleeve 4 after pouring, pouring the cement mortar into the gaps between the outer core rib 8 and the sleeve 4, and fixing a sleeve plate 12 at the top of the pile body 1;

cleaning the inner cavity wall of the pile body 1, brushing pure cement mortar or concrete interface agent with the strength grade not lower than 42.5 on the inner side wall twice, fixing the support plate 13 placed in the inner cavity 2 (pre-buried ribs 14 and stirrups 15 are welded on the support plate 13 in advance), and finally pouring micro-expansion concrete in the inner cavity 2.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (6)

1. The utility model provides a pile structure for foundation resistance to plucking which characterized in that it includes:

pile body (1), by inner chamber (2) that pile body (1) inside wall encloses, inlay establish inner core muscle (9) in pile body (1), fix on pile body (1) and with outer core muscle (8) that inner core muscle (9) are fixed mutually, set up layer board (13) in inner chamber (2), fix layer board (13) top and circumference setting's pre-buried muscle (14), connection stirrup (15) that pre-buried muscle (14) and interval set up and pour micro-expansion concrete layer (16) of inner chamber (2).

2. The uplift pile structure for foundation according to claim 1, wherein: it is still including seting up sleeve chamber (3) that pile body (1) top and circumference set up, cartridge are established sleeve (4) in sleeve chamber (3) and seting up outer muscle groove (5), outer oblique guide face (6) and interior muscle groove (7) in sleeve (4), outer oblique guide face (6) from top to bottom diameter convergent, outer muscle groove (5) link to each other with the one end of outer oblique guide face (6) major diameter, interior muscle groove (7) link to each other with the one end of outer oblique guide face (6) minor diameter, outer core muscle (8) are fixed in outer muscle groove (5), inner core muscle (9) are fixed in interior muscle groove (7).

3. The uplift pile structure for foundation according to claim 2, characterized in that: the pile body comprises an inner core rib (9), a supporting block (10) integrally connected to the top of the inner core rib, an inner inclined guide surface (11) arranged on the outer side of the supporting block (10) and a sleeve plate (12) fixed to the top of the pile body (1), wherein the inner inclined guide surface (11) is matched with the outer inclined guide surface (6).

4. The uplift pile structure for foundation according to claim 1, wherein: the diameter of the supporting plate (13) is smaller than that of the inner cavity (2).

5. The uplift pile structure for foundation according to claim 1, wherein: the length of the embedded ribs (14) inserted into the inner cavity (2) is not less than five times of the outer diameter of the pile body (1).

6. The uplift pile structure for foundation according to claim 2, characterized in that: the diameter of the outer core rib (8) is smaller than that of the outer rib groove (5), and the diameter of the inner core rib (9) is smaller than that of the inner rib groove (7).