Novel anti-pulling anchor rod pile structure

Abstract

The utility model discloses a novel anti-pulling anchor rod pile structure, which belongs to the technical field of pile foundations and is characterized in that a novel anti-pulling anchor rod pile is divided into an expanded anchoring section and a common anchoring section and penetrates through a central rod body of a pile body, and a sleeve is arranged outside the rod body. The expanded anchoring section is a connecting part of the rod body inserted into the reinforcing steel bar clamping groove disc and the umbrella-shaped reinforcing steel bar mesh A; the common anchoring section is a part where the rod body is inserted into the steel bar clamping groove disc and connected with the umbrella-shaped steel bar mesh B; the reinforcing steel bar clamping groove disc is fixed on the rod body through a nut; the steel plate A is fixed to the pile top through the high-strength nut, and the spring and the steel plate B are sleeved with the top of the rod body. And after the anchor rod pile is put down, the steel wires are adjusted, and the reinforcing mesh A and the reinforcing mesh B fill the expanded anchoring section and the common anchoring section in an umbrella shape. The anchor rod pile is simple in structure, and the pulling resistance of the anchor rod pile is improved by enlarging the pulling resistance of the anchoring section and the friction force between the common anchoring section and the soil body; the durability of the pile body is improved through the sleeve; applying prestress through the steel plate A; foundation steel bars are connected with springs, and the anchoring force of the pile and the foundation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering pile foundations, in particular to a novel pull-out resistant anchor pile structure. Background Art

[0002] With the continuous improvement of science and technology, people's requirements for the quality of buildings are also increasing. Therefore, construction projects are also developing with the improvement of science and technology, and the requirements of buildings for pile foundations are also increasing. Many water-rich areas require pile foundations not only in terms of compressive bearing capacity, but more in terms of pull-out resistance. At the same time, in some economically developed areas such as the southeast coast, urban space is increasingly scarce, and the development of the above-ground part is restricted, which has caused a boom in the development of underground space. The development and use of underground projects are affected by the buoyancy of groundwater. Pull-out anchor piles play an increasingly important role in the field of construction engineering.

[0003] The pull-out anchor pile is set below the foundation, and the surrounding area is corroded by groundwater and other chemical corrosive substances for many years, and strict requirements are placed on the durability of the pull-out anchor pile. In the Chinese patent document publication number CN101761089A, a fiber reinforced concrete pull-out pile is disclosed. The pull-out pile prevents rust by sleeves on the outside of the fiber reinforcement, but no prestress is applied to the pull-out pile, and the pull-out resistance needs to be further improved. On this basis, the present invention further improves the pull-out resistance and durability of the anchor pile by applying prestress and friction; at the same time, the structure is simple, economical, convenient to construct, and reduces costs. Utility Model Content

[0004] In order to solve the above-mentioned technical problems such as insufficient pull-out resistance of the pull-out pile, the utility model provides a new type of pull-out anchor pile structure with strong pull-out resistance, strong corrosion resistance and high economy, which can not only greatly improve the pull-out resistance of the anchor pile, but also improve the corrosion resistance of the anchor pile body and enhance the durability of the anchor pile. The utility model uses a variable diameter pull-out pile body, and places an umbrella-shaped steel mesh A in the pile body part of the expanded anchoring section to improve the pull-out resistance of the expanded end, and places an umbrella-shaped steel mesh B in the pile body part of the ordinary anchoring section to increase the friction between the pile body and the soil to improve the pull-out resistance of the ordinary section; the pull-out resistance is combined by the expanded anchoring section and the ordinary anchoring section, thereby improving the overall pull-out resistance of the anchor pile.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A new type of pull-out anchor pile structure, the pile body is different from the ordinary pull-out pile body, the pull-out pile body consists of an enlarged anchoring section and an ordinary anchoring section, the umbrella-shaped steel mesh A is filled in the enlarged anchoring section in an umbrella shape, and the umbrella-shaped steel mesh B is filled in the ordinary anchoring section in an umbrella shape, relying on the pull-out force between the enlarged anchoring section and the soil and the friction between the ordinary anchoring section and the soil to provide the pull-out force of the pull-out anchor pile. The pull-out rod body is located in the center of the concrete pile body, the diameter of the casing sleeved outside the rod body is larger than the rod body diameter, and a gap is left between the two and relative slip can occur, the gap is filled with anti-corrosion grease and sealed, and the rod body is prestressed by adjusting the high-strength nut at the steel plate A. The foundation steel bar passes through the spring to increase the anchoring force between the pile and the foundation.

[0007] The umbrella-shaped steel mesh A is gathered in the expanded anchoring section by the steel wire A, and the umbrella-shaped steel mesh A is gathered by the steel wire A and then lowered into the expanded anchoring section. After the umbrella-shaped steel mesh A is in place, the steel wire A is pulled out so that the umbrella-shaped steel mesh A is evenly distributed in the expanded anchoring section in an umbrella shape. The umbrella-shaped steel mesh B is gathered in the ordinary anchoring section by the steel wire B, and the umbrella-shaped steel mesh B is gathered by the steel wire B and then lowered into the ordinary anchoring section. After the umbrella-shaped steel mesh B is in place, the steel wire B is pulled out so that the umbrella-shaped steel mesh B is evenly distributed in the ordinary anchoring section in an umbrella shape.

[0008] The steel bar slot plate is a circular steel flat plate, with a hollow circular sleeve in the middle, the diameter of the circular sleeve is slightly larger than the diameter of the anti-pulling rod body, and six symmetrical rectangular slots are evenly arranged around it, each slot is placed with a steel bar with a lower welded pin shaft, and a pin shaft slot is opened on both sides of the rectangular slot, and the steel bar with the welded pin shaft is inserted into the pin shaft slot. After the steel wire is pulled out, the steel bar opens at an umbrella-shaped angle and fills the expanded anchoring section and the ordinary anchoring section, and by placing several steel bar slot plates in the expanded anchoring section, this part of the steel bar rotates along the pin shaft and fills the anchoring section in a pagoda shape, ensuring that the steel bar is evenly distributed in the pile body, further enhancing the pile body's pull-out resistance. The diameter of the steel bar slot plate is slightly smaller than the diameter of the ordinary anchoring section, so that the rod body can be placed vertically in the center of the concrete pile body, reducing the placement of a centering ring in the rod body during construction, and through several steel meshes B filled in the ordinary anchoring section, friction between the pile and the soil can be provided, thereby enhancing the pile body's pull-out resistance.

[0009] A pin A is welded at the bottom of each steel bar of the umbrella-shaped steel mesh A. The diameter of the pin A is slightly smaller than the diameter of the pin slot so that the pin A can be smoothly inserted into the pin slot, and the steel mesh A can be rotated around the pin A. The upper part of the steel mesh A is tied with the steel wire A. After the upper buckle of the steel mesh A is pulled off, the bottom of the steel mesh A starts to rotate under the action of the pin A, and the steel mesh A rotates around the pin A and spreads out. Under the constraint of the steel wire A, several steel meshes A stop rotating when they reach the maximum spreading angle, forming an equi-angle umbrella shape.

[0010] A pin B is welded at the bottom of each steel bar of the umbrella-shaped steel mesh B. The diameter of the pin B is slightly smaller than the diameter of the pin slot so that the pin B can be smoothly inserted into the pin slot, and the steel mesh B can be rotated around the pin B. The upper part of the steel mesh B is tied with the steel wire B. After the upper buckle of the steel mesh B is pulled off, the bottom of the steel mesh B starts to rotate under the action of the pin B, and the steel mesh B rotates around the pin B and spreads out. Under the constraint of the steel wire B, several steel meshes B stop rotating when they reach the maximum spreading angle, forming an equi-angle umbrella shape.

[0011] The anti-pullout rod body is a prestressed threaded steel bar, and the expanded anchoring section is evenly inserted into the circular sleeve of several steel bar slot disks, and the steel bar slot disks of the expanded anchoring section are fixed to the rod body with nuts, and the ordinary anchoring section is evenly inserted into the circular sleeve of several steel bar slot disks, and the steel bar slot disks of the ordinary anchoring section are fixed to the rod body with nuts, and the steel plate A is fixed to the foundation surface layer of the rod body with high-strength nuts, and the spring and steel plate B are fixed to the upper part of the rod body through nuts.

[0012] The bottom of the steel wire A is annular, and several umbrella-shaped steel meshes A are tied and gathered so that they can pass through the ordinary anchoring section to reach the expanded anchoring section, with knots left on them. After the anti-pullout rod body and the umbrella-shaped steel mesh A are in place, the knots of the steel wire A are pulled out, and the umbrella-shaped steel mesh A opens in an umbrella shape to fill the entire pile body expanded anchoring section.

[0013] The bottom of the steel wire B is annular, and several umbrella-shaped steel meshes B are tied and gathered so that they can be placed in the ordinary anchoring section, with knots left on them. After the anti-pullout rod and the umbrella-shaped steel mesh B are in place, the knots of the steel wire B are pulled off, and the umbrella-shaped steel mesh B opens in an umbrella shape to fill the entire ordinary anchoring section of the pile body.

[0014] The steel plate A is placed on the surface layer of the rod foundation. By adjusting and tightening the high-strength nut, the rod body slides relatively along the sleeves as the prestress is applied, thereby achieving the purpose of applying prestress to the concrete pile, thereby further improving the pull-out resistance of the anchor pile.

[0015] The spring is placed between the steel plates A and B. When the foundation reinforcement is tied, it can pass through the spring to form a whole and be cast in the foundation bottom plate, so that a stable anchoring force is formed between the anchor pile and the foundation.

[0016] The steel plate B is placed on the upper part of the spring and fixed to the top of the rod body by a nut, which can ensure that when the foundation and the anchor pile are subjected to force, the rod body will not be unanchored from the concrete.

[0017] The beneficial effects of the utility model are:

[0018] Compared with the prior art, the utility model has an ingenious structure and is easy to construct. It utilizes the pull-out resistance of the pile body of the expanded anchoring section and the friction force of the pile body of the ordinary anchoring section to increase the pull-out resistance of the anchor pile and reduce the construction process and the amount of steel bars used during construction. One end of the pull-out rod body is fixed in the foundation bottom plate to generate an upward pulling force when subjected to force, and the other end is fixed to the pile bottom and the pile body to prevent it from moving upward. The application of prestress can make the rod body enter the working state in advance, reducing the cracking of the building due to tiny water buoyancy. The anti-pullout rod, sleeve, umbrella-shaped steel mesh A, steel wire A, umbrella-shaped steel mesh B, steel wire B, steel bar slot plate, steel plate A, spring and steel plate B form a whole. The anti-pullout rod is located at the center of the pile, and the sleeve is set outside the anti-pullout rod. Each steel bar of the umbrella-shaped steel mesh is evenly arranged around the rod. The steel wire connects each steel bar and puts it into the pile body as a whole. After all parts are placed in place, the steel wire knot is pulled down to make the steel mesh of the expanded anchoring section and the ordinary anchoring section spread out at equal angles. The setting of the spring can further improve the anchorage between the pile body and the foundation bottom plate, and the sleeve is set outside the anti-pullout rod and filled with anti-corrosion grease and sealed, which can not only ensure that the prestress can be applied to the rod body, but also prevent the rod body from being corroded by groundwater or other chemicals, thereby improving the durability of the pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the anti-pullout anchor pile of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the new type of pull-out anchor pile before the steel wire is pulled out of the utility model;

[0021] Figure 3 This is a schematic diagram of the steel bar slot plate of the utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the utility model along line Ⅰ-Ⅰ;

[0023] Figure 5 This is a schematic diagram of the Ⅱ-Ⅱ cross section of the utility model;

[0024] In the attached Figure 1 ~Attached Figure 5 Among them, 1 is a steel bar slot plate; 2 is an umbrella-shaped steel bar mesh A; 3 is a steel wire A; 4 is a sleeve; 5 is an expanded anchoring section; 6 is an umbrella-shaped steel bar mesh B; 7 is a steel wire B; 8 is a common anchoring section; 9 is a steel plate A; 10 is a high-strength nut; 11 is a spring; 12 is a steel plate B; 13 is a rod body; 14 is a basic bottom plate; 15 is a circular sleeve; 16 is a pin slot; 17 is a rectangular slot; 18 is a pin A; 19 is a pin B. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] This will be described below in conjunction with the preferred embodiments of the present utility model.

[0027] Figure 1 The schematic diagram of a novel pull-out anchor pile structure according to the utility model is composed of a pull-out rod body 13 with an external sleeve 4, an enlarged anchoring section 5, a common anchoring section 8, an umbrella-shaped steel mesh A2, an umbrella-shaped steel mesh B6, steel wires A3, steel wires B7, a steel bar slot plate 1, a steel plate A9, a high-strength nut 10, a spring 11 and a steel plate B12. Figure 2 In order to pull down the state of umbrella-shaped steel mesh A2 and umbrella-shaped steel mesh B6 when they are tied before the steel wire A3 and the steel wire B7 are buckled, the umbrella-shaped steel mesh A2 and the umbrella-shaped steel mesh B6 are bound so that they can smoothly pass through the pile diameter of the ordinary anchoring section and enter the expanded anchoring section when the pile body is below. Figure 3 It is a schematic diagram of a steel bar slot plate 1, which includes a circular sleeve 15, a pin slot 16 and a rectangular slot 17. In this example, six rectangular slots 17 are provided. A pair of pin slots 16 are provided on both sides of each rectangular slot 17 for inserting the pin. The arrangement can be adjusted according to the actual situation and prefabricated and installed in the factory. The utility model provides a novel pull-out anchor pile structure, which is characterized in that the construction steps are as follows:

[0028] Use a professional hole enlarging drill, such as an inverted umbrella-shaped enlargement head drill disclosed in publication number CN109736709A, to operate, and control the enlargement scale of the drill according to the required size to form a hole as shown in the figure. Figure 1 The variable diameter pile shaft shown;

[0029] like Figure 2 As shown, the prefabricated steel bar slot disk 1, sleeve 4, anti-pullout rod body 13, umbrella-shaped steel bar mesh A2, umbrella-shaped steel bar mesh B6 and steel wire A3, steel wire B7 are assembled to form a whole. First, the anti-pullout rod body 13 is vertically inserted into several steel bar slot disks 1, and the rod body 13 is fixed on the steel bar slot disk 1 with a nut. The sleeve 4 is arranged outside the rod body 13, and the gap between the two is filled with anti-corrosion grease and sealed. Secondly, the umbrella-shaped steel bar mesh A2 and the umbrella-shaped steel bar mesh B6 are tied with steel wire A3 and steel wire B7 respectively, and the wire A3 and the steel wire B7 are reserved at the upper part of the rod body to form a whole, and this whole is vertically placed at the bottom of the anti-pullout anchor pile.

[0030] like Figure 1As shown, after the anti-pullout rod 13 and the umbrella-shaped steel mesh A2 and the umbrella-shaped steel mesh B6 are put in place, the wire A3 and the wire B7 are pulled out to reserve knots on the upper part of the rod. After they are completely spread out, concrete is poured to form piles. After the piles are formed, they are cured to reach the designed strength. The steel plate A is fixed on the rod 13 at the foundation surface layer with a high-strength nut 10, and prestress is applied as required.

[0031] like Figure 1 As shown, after the prestress is applied to the pull-out anchor pile, a spring 11 is put on the upper part thereof, and a steel plate B12 is fixed thereon with a nut, and the foundation bottom plate steel bars are passed through the spring 11, and the upper part of the rod body is cast in the foundation pedestal 14.

[0032] It is easy for those skilled in the art to understand that the above description is only a more convenient embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel pull-out anchor pile structure, wherein the pull-out anchor pile body is composed of an enlarged anchoring section (5) and a common anchoring section (8), and is characterized by: The anti-pullout rod body (13) is located at the center of the anchor pile body, the umbrella-shaped steel mesh A (2) is gathered in the expanded anchoring section (5) through the steel wire A (3), the umbrella-shaped steel mesh B (6) is gathered in the common anchoring section (8) through the steel wire B (7), the diameter of the sleeve (4) sleeved outside the rod body (13) is slightly larger than the diameter of the rod body (13), the spring (11) is sleeved on the middle part of the rod body between the steel plate A (9) and the steel plate B (12), and the steel bar slot plate (1) is fixed on the rod body (13).

2. A novel anti-pulling anchor pile structure according to claim 1, characterized in that: The steel bar slot plate (1) is a circular steel flat plate, with a circular sleeve (15) in the middle and six symmetrical rectangular slots (17) evenly arranged around it, and a pin slot (16) is arranged on each side of the rectangular slot (17).

3. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The bottom of the umbrella-shaped steel mesh A (2) is welded with a pin shaft A (18), which is inserted into a pin shaft slot (16) so that the umbrella-shaped steel mesh A (2) can rotate around the pin shaft A (18), and the upper part of the umbrella-shaped steel mesh A (2) is tied by a steel wire A (3).

4. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The bottom of the umbrella-shaped steel mesh B (6) is welded with a pin shaft B (19), which is inserted into a pin shaft slot (16) so that the umbrella-shaped steel mesh B (6) can rotate around the pin shaft B (19), and the upper part of the umbrella-shaped steel mesh B (6) is tied by a steel wire B (7).

5. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The rod body (13) is a prestressed threaded steel bar. The expanded anchoring section (5) is evenly inserted into the circular sleeves (15) of several steel bar slot discs (1), and the steel bar slot discs (1) of the expanded anchoring section (5) are fixed to the rod body (13) by nuts. The common anchoring section (8) is evenly inserted into the circular sleeves (15) of several steel bar slot discs (1), and the steel bar slot discs (1) of the common anchoring section (8) are fixed to the rod body (13) by nuts. The steel plate A (9) is fixed to the foundation surface layer of the rod body (13) by high-strength nuts (10), and the spring (11) and the steel plate B (12) are fixed to the upper part of the rod body (13) by nuts.

6. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The bottom of the steel wire A (3) is annular, and several umbrella-shaped steel meshes A (2) are tied and gathered, leaving a knot on the top of the pile. After the umbrella-shaped steel meshes A (2) and the rod body (13) are placed in place, the umbrella-shaped steel meshes A (2) are opened in an umbrella shape by pulling off the knot on the upper part of the steel wire A (3).

7. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The bottom of the steel wire B (7) is annular, and several umbrella-shaped steel meshes B (6) are tied and gathered, leaving a knot on the top of the pile. After the umbrella-shaped steel meshes B (6) and the rod body (13) are placed in place, the umbrella-shaped steel meshes B (6) are opened in an umbrella shape by pulling off the knot on the upper part of the steel wire B (7).

8. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The steel plate A (9) is placed on the foundation surface layer of the rod body (13), and prestress is applied to the pile by adjusting the high-strength nut (10).

9. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The spring (11) is placed between the steel plate A (9) and the steel plate B (12), and the foundation steel bar passes through the spring (11) and is cast in the foundation bottom plate (14).

10. The novel pull-out resistant anchor pile structure according to claim 1 is characterized in that: The steel plate B (12) is placed on the upper part of the spring (11) and fixed to the top of the rod body (13) through a nut.

Images