CN213625665U

CN213625665U - Pile foundation structure suitable for soft soil foundation

Info

Publication number: CN213625665U
Application number: CN202022383995.8U
Authority: CN
Inventors: 张泽丰; 刘曙光; 刘咏华; 王帆; 欧阳进; 戴鹏飞; 汤小辉; 董仲洋
Original assignee: Hunan Province Tongtai Engineering Co ltd
Current assignee: Hunan Province Tongtai Engineering Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-07-06
Anticipated expiration: 2030-10-23

Abstract

The utility model discloses a pile foundation structure suitable for soft soil foundation, the outer wall cover in foundation pile upper portion is equipped with the concrete mount, the outside of concrete mount is poured into the concrete piece, the top of foundation pile is installed with horizontal pile cap, the border position of pile cap is provided with a plurality of anchor rod sleeve along the equidistant circumference, anchor rod is inserted inside the anchor rod sleeve; the anchoring rod is of a hollow structure, a plurality of axially extending chutes are uniformly arranged in a hollow cavity of the anchoring rod along the circumferential direction, a through hole is formed in the side wall of the anchoring rod at the bottom of each chute, and the axis of each through hole is perpendicular to the axis of the anchoring rod; install vertical muscle pipe that adds in the cavity of anchor rod, the bottom that adds the muscle pipe is equipped with a plurality of curved material pipes that lead to, leads to the material pipe and adds the muscle pipe intercommunication, leads to the material pipe and can follow the spout lapse that corresponds until stretching out the through-hole. The utility model discloses reduce the foundation pile and bury the degree of depth, increased the area of contact and the torsion resistance of foundation pile and the soil body simultaneously, improved the level and the axial bearing capacity of pile foundation structure.

Description

Pile foundation structure suitable for soft soil foundation

Technical Field

The utility model belongs to the technical field of the pile foundation structure, a pile foundation structure suitable for soft soil foundation is related to.

Background

Buildings on soft soil foundations are often subjected to combined action of horizontal load, vertical load and the like, the horizontal load is often large, and the depth and the strength of foundation piles need to meet the requirements of the horizontal load, the vertical load, the bending distance and the like. The conventional method is to increase the embedding depth of the pile body, and has the defects of increasing the construction difficulty, the construction period and the construction cost, and easily causing the phenomena of pile sliding, pile slipping and the like in the construction process; cylindrical pile structure appears becoming flexible and slides very easily in soft soil layer, and the fixed strength and the stability of pile foundation receive great influence.

Disclosure of Invention

In order to solve the problem, the utility model provides a pile foundation structure suitable for soft soil foundation reduces the foundation pile and buries the degree of depth, has increased the area of contact and the torsion resistance of foundation pile and the soil body simultaneously, has improved the level and the axial bearing capacity of pile foundation structure, has reduced the construction degree of difficulty and construction cost, has prolonged life, has solved the problem that exists among the prior art.

The utility model adopts the technical scheme that the pile foundation structure suitable for the soft soil foundation comprises a foundation pile, wherein a concrete fixing frame is arranged on the outer wall of the upper part of the foundation pile, concrete blocks are poured outside the concrete fixing frame, a horizontal pile cap is installed at the top of the foundation pile, a plurality of anchoring rod sleeves are arranged at the edge position of the pile cap at equal intervals along the circumferential direction, and anchoring rods are inserted into the anchoring rod sleeves; the anchoring rod is of a hollow structure, a plurality of axially extending chutes are uniformly arranged in a hollow cavity of the anchoring rod along the circumferential direction, a through hole is formed in the side wall of the anchoring rod at the bottom of each chute, and the axis of each through hole is perpendicular to the axis of the anchoring rod; install vertical muscle pipe that adds in the cavity of anchor rod, the bottom that adds the muscle pipe is equipped with a plurality of curved material pipes that lead to, leads to the material pipe and adds the muscle pipe intercommunication, leads to the tip kickup of material pipe, leads to the quantity of material pipe and equals with the quantity of spout, leads to the material pipe and can follow the spout lapse that corresponds until stretching out the through-hole.

Furthermore, the concrete fixing frame consists of a sleeve and reinforcing plates, the sleeve is sleeved on the outer wall of the foundation pile and is in clearance fit with the foundation pile, the bottom of the sleeve is provided with a limiting block, the top of the sleeve is provided with a fixing nut, and the sleeve is provided with a plurality of reinforcing plates which extend outwards horizontally at equal intervals along the axial direction; the concrete block is poured outside the concrete fixing frame, the limiting block and the fixing nut.

Furthermore, the outer wall of the concrete block is provided with a plurality of vertical ribs.

Furthermore, the reinforcing plate and the sleeve are of an integrated structure.

Furthermore, the bottom surface middle position of pile cap is fixed and is provided with the foundation pile sleeve, and the foundation pile top is pegged graft in the telescopic inside of foundation pile, and the foundation pile sleeve is clearance fit with the foundation pile.

Furthermore, pile cap and anchor rod sleeve formula structure as an organic whole, pile cap and foundation pile sleeve formula structure as an organic whole.

Further, the limiting blocks are integrally formed with the foundation piles.

Further, the fixing nut is in threaded connection with the foundation pile through external threads.

Further, the foundation pile is of a steel structure, and a corrosion-resistant coating layer is arranged on the outer surface of the foundation pile.

Further, the bottom of the anchoring rod is conical.

The utility model has the advantages that:

the utility model has reasonable and effective structure, is suitable for soft soil body, the concrete blocks are poured outside the concrete fixing frame, the limiting block and the fixing nut, the outer wall of the concrete block is provided with a plurality of vertical ribs, the contact area and the torsion resistance of the foundation pile and the soil body are increased, thereby improving the level and the axial supporting strength of the pile foundation structure; the concrete mount has improved the joint strength of concrete piece and foundation pile, has avoided concrete piece and foundation pile separation after long-time the use, and the concrete piece is favorable to protecting concrete mount, restriction piece and fixation nut, increase of service life.

The utility model can add the slurry from the upper port of the reinforced pipe, and flow to the surrounding soil body from the end part of the material passing pipe, thereby improving the consolidation strength of the soil body and the anchoring effect of each anchoring rod; then concrete is poured into the hollow cavity of the anchoring rod, so that the bearing strength of the anchoring rod is improved, and the horizontal bearing capacity of the pile foundation structure is enhanced under the combined action of a plurality of anchoring rods; make the utility model discloses increase the area of contact and the twisting resistance of foundation pile and the soil body when reducing the foundation pile and burying the degree of depth, improved the level and the axial bearing capacity of pile foundation structure, it is high to have solved the construction degree of difficulty that causes too greatly by the buried degree of depth of foundation pile, and construction cost is big, and smooth stake, swift current stake scheduling problem easily appear in the work progress.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a top view of the anchor rod.

Fig. 4 is a schematic structural diagram of a foundation pile in an embodiment of the present invention.

Fig. 5 is a schematic structural view of a concrete fixing frame according to an embodiment of the present invention.

Fig. 6 is a schematic top view of a pile cap according to an embodiment of the present invention.

In the figure: 1. foundation piles; 2. a concrete block; 3. fixing a nut; 4. a limiting block; 5. a concrete fixing frame; 6. an external thread; 7. an anchor rod sleeve; 8. a sleeve; 9. a reinforcing plate; 10. a pile cap; 11. an anchoring rod; 12. a foundation pile sleeve; 13. a ribbed tube; 14. a material passing pipe; 15. a chute; 16. a through hole; 17. and (4) ribs.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 6, the pile foundation structure suitable for soft soil foundation of the embodiment of the present invention includes a foundation pile 1, a concrete fixing frame 5 is sleeved on the outer wall of the foundation pile 1, a concrete block 2 is poured outside the concrete fixing frame 5, and a plurality of vertical ribs 17 are arranged on the outer wall of the concrete block 2; the top of the foundation pile 1 is provided with a horizontal pile cap 10, the edge position of the pile cap 10 is provided with a plurality of anchoring rod sleeves 7 at equal intervals along the circumferential direction, anchoring rods 11 are inserted into the anchoring rod sleeves 7, and the anchoring rods 11 are in clearance fit with the anchoring rod sleeves 7.

As shown in fig. 2-3, the bottom of the anchor rod 11 is conical, the anchor rod 11 is hollow, a plurality of axially extending chutes 15 are uniformly arranged in the hollow cavity of the anchor rod 11 along the circumferential direction, a through hole 16 is arranged on the sidewall of the anchor rod 11 at the bottom of each chute 15, and the axis of each through hole 16 is perpendicular to the axis of the anchor rod 11; a vertical reinforced pipe 13 is installed in a hollow cavity of the anchoring rod 11, a plurality of arc-shaped material passing pipes 14 are arranged at the bottom of the reinforced pipe 13, the end parts of the material passing pipes 14 are bent upwards, the number of the material passing pipes 14 is equal to that of the sliding chutes 15, and the material passing pipes 14 can slide downwards along the corresponding sliding chutes 15 until extending out of the through holes 16; the grout is added from the upper port of the reinforced pipe 13, flows to the surrounding soil body from the end part of the material passing pipe 14, improves the consolidation strength of the soil body, improves the anchoring effect of each anchoring rod 11, and enhances the horizontal bearing capacity of the pile foundation structure under the combined action of the anchoring rods 11.

As shown in fig. 4-5, the concrete fixing frame 5 is composed of a sleeve 8 and a reinforcing plate 9, the sleeve 8 is sleeved on the outer wall of the foundation pile 1, the sleeve 8 is in clearance fit with the foundation pile 1, a limiting block 4 is arranged at the bottom of the sleeve 8, the limiting block 4 is integrally formed with the foundation pile 1, a fixing nut 3 is arranged at the top of the sleeve 8, an external thread 6 is arranged outside the foundation pile 1 at the top of the concrete fixing frame 5, and the fixing nut 3 is in threaded connection with the foundation pile 1 through the external thread 6 and is used for fixing the concrete fixing frame 5; a plurality of reinforcing plates 9 which extend outwards horizontally are arranged on the sleeve 8 at equal intervals along the axial direction; the connection strength of the concrete block 2 and the foundation pile 1 is improved, and the problem that the foundation pile 1 sinks quickly due to the separation of the concrete block 2 and the foundation pile 1 after long-time use is solved; concrete blocks 2 are poured outside the concrete fixing frame 5, the limiting blocks 4 and the fixing nuts 3, so that the contact area and the torsion resistance of the foundation pile 1 and a soil body are increased, and the horizontal and axial supporting strength of the pile foundation structure is improved.

In the embodiment, a foundation pile sleeve 12 is fixedly arranged in the middle of the bottom surface of the pile cap 10, the top of the foundation pile 1 is inserted into the foundation pile sleeve 12, and the foundation pile sleeve 12 is in clearance fit with the foundation pile 1.

In the embodiment, the reinforcing plate 9 and the sleeve 8 are of an integral structure, the anchor rod sleeve 7 and the pile cap 10 are of an integral structure, and the foundation pile sleeve 12 and the pile cap 10 are of an integral structure.

In the embodiment, the foundation pile 1 is of a steel structure, and the outer surface of the foundation pile 1 is provided with a corrosion-resistant coating layer; concrete block 2 wraps up concrete mount 5, restriction piece 4 and fixation nut 3 completely, is favorable to protecting concrete mount 5, restriction piece 4 and fixation nut 3, increase of service life.

The utility model discloses working process: during construction, a pile driver is used for vertically driving a foundation pile 1 into a soil body, soil on the upper portion of the foundation pile 1 is dug out, a limiting block 4 of the foundation pile 1 is exposed, a sleeve 8 of a concrete fixing frame 5 is sleeved on the foundation pile 1, the bottom of the sleeve 8 is in close contact with the limiting block 4, the sleeve 8 is fixed through a fixing nut 3, a plurality of vertical grooves are dug in the inner wall of a soil pit outside the concrete fixing frame 5, concrete is poured into the soil pit to form a concrete block 2, the concrete block 2 wraps the concrete fixing frame 5, the limiting block 4 and the fixing nut 3, and a plurality of vertical ribs 17 are formed in the grooves; the contact area and the torsion resistance of the foundation pile 1 and the soil body are increased, and therefore the horizontal and axial supporting strength of the pile foundation structure is improved. Installing a pile cap 10 on the top of the foundation pile 1, inserting an anchoring rod 11 into soil from the inside of an anchoring rod sleeve 7, and adding size mixing slurry from the upper end opening of a reinforced pipe 13, wherein the size mixing slurry is used for improving the consolidation strength of soft soil and is a material known in the field; the slurry is adjusted to flow to the surrounding soil body from the end part of the material passing pipe 14, so that the consolidation strength of the soil body is improved, and the anchoring effect of each anchoring rod 11 is improved; then, concrete is poured into the hollow cavity of the anchor rod 11, so that the bearing strength of the anchor rod 11 is improved, and the horizontal bearing capacity of the pile foundation structure is enhanced under the combined action of the anchor rods 11; make the utility model discloses incompletely rely on the degree of depth of burying of foundation pile 1 to improve stability, increased the area of contact and the twisting resistance of foundation pile and the soil body when reducing the foundation pile degree of depth of burying, improved the level and the axial bearing capacity of pile foundation structure, it is high to have solved the construction degree of difficulty that the degree of depth of burying caused too greatly by foundation pile 1, and construction cost is big, and smooth pile, swift current pile scheduling problem easily appear in the work progress.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A pile foundation structure suitable for a soft soil foundation is characterized by comprising a foundation pile (1), wherein a concrete fixing frame (5) is arranged on the outer wall of the upper part of the foundation pile (1), concrete blocks (2) are poured outside the concrete fixing frame (5), a horizontal pile cap (10) is installed at the top of the foundation pile (1), a plurality of anchor rod sleeves (7) are arranged at equal intervals along the circumferential direction at the edge position of the pile cap (10), and anchor rods (11) are inserted into the anchor rod sleeves (7); the anchoring rod (11) is of a hollow structure, a plurality of axially extending sliding grooves (15) are uniformly formed in the hollow cavity of the anchoring rod (11) along the circumferential direction, a through hole (16) is formed in the side wall of the anchoring rod (11) at the bottom of each sliding groove (15), and the axis of each through hole (16) is perpendicular to the axis of the anchoring rod (11); install vertical muscle pipe (13) that adds in the cavity of anchor pole (11), the bottom that adds muscle pipe (13) is equipped with a plurality of curved material pipes (14) that lead to, lead to material pipe (14) and add muscle pipe (13) intercommunication, lead to the tip kickup of material pipe (14), the quantity that leads to material pipe (14) equals with the quantity of spout (15), lead to material pipe (14) and can follow corresponding spout (15) and slide down until stretching out through-hole (16).

2. The pile foundation structure suitable for the soft soil foundation according to claim 1, wherein the concrete fixing frame (5) is composed of a sleeve (8) and a reinforcing plate (9), the sleeve (8) is sleeved on the outer wall of the foundation pile (1), the sleeve (8) is in clearance fit with the foundation pile (1), the bottom of the sleeve (8) is provided with a limiting block (4), the top of the sleeve (8) is provided with a fixing nut (3), and the sleeve (8) is provided with a plurality of reinforcing plates (9) which extend outwards horizontally at equal intervals along the axial direction; the concrete block (2) is poured outside the concrete fixing frame (5), the limiting block (4) and the fixing nut (3).

3. Pile foundation structure for soft soil foundations according to claim 2, characterized in that the outer wall of the concrete block (2) is provided with a plurality of vertical ribs (17).

4. A pile foundation structure suitable for soft soil foundations according to claim 2, wherein the reinforcing plate (9) is of one-piece construction with the sleeve (8).

5. A pile foundation structure suitable for soft soil foundation according to claim 1, wherein a foundation pile sleeve (12) is fixedly arranged at the middle position of the bottom surface of the pile cap (10), the top of the foundation pile (1) is inserted into the foundation pile sleeve (12), and the foundation pile sleeve (12) is in clearance fit with the foundation pile (1).

6. Pile foundation structure suitable for soft soil foundations according to claim 1, characterized in that the pile cap (10) is of one-piece construction with the anchor rod sleeve (7) and the pile cap (10) is of one-piece construction with the foundation pile sleeve (12).

7. Pile foundation structure suitable for soft soil foundations according to claim 2, characterized in that the limiting blocks (4) are integrally formed with the foundation piles (1).

8. Pile foundation structure suitable for soft soil foundations according to claim 2, characterized in that the fixing nut (3) is screwed with the foundation pile (1) by means of an external thread (6).

9. A pile foundation structure suitable for soft soil foundations according to claim 1, characterized in that the foundation pile (1) is of steel construction, and the outer surface of the foundation pile (1) is provided with a corrosion-resistant coating layer.

10. Pile foundation structure for soft soil foundations according to claim 1, characterized in that the bottom of the anchoring bar (11) is conical.