Preset reinforcement cage cast-in-place concrete threaded anti-pulling anchor pile with anchor disc at bottom

Abstract

The utility model provides a cast-in-place concrete threaded anti-pulling anchor pile with a preset reinforcement cage with an anchor disc at the bottom, and relates to the field of building construction. The cast-in-place concrete threaded anti-pulling anchor pile with the preset reinforcement cage with the anchor disc at the bottom comprises an anti-pulling force threaded anchor pile body, the interior of the anti-pulling force threaded anchor pile body is of a hollow structure, the interior of the anti-pulling force threaded anchor pile body is filled with a threaded pile concrete pile body, and the threaded pile concrete pile body is wrapped with an anti-pulling force lifting mechanism; a drilling machine power box is installed at the top end of the pulling-resistance threaded anchor pile, and a guide pipe is installed at the top of the drilling machine power box. The reinforcement cage with the anchor disc at the bottom is placed in the middle cavity of the anti-pulling force threaded anchor pile in advance, superfluid concrete is pressed and poured into the cavity of the anti-pulling force threaded anchor pile through a drilling machine and rotates forwards and backwards at the same time, the problem of unreliability of a rear joint bar of a threaded pile or a screw pile can be solved, construction is easy and convenient, the manufacturing cost is low, the construction speed is high, and positioning is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a cast-in-situ concrete screw anti-pulling anchor pile with a prefabricated steel reinforcement cage with an anchor plate at the bottom. Background Art

[0002] With the improvement of people's living standards and the requirements of civil air defense construction, basements are currently set in various buildings. Most basements are affected by the buoyancy of groundwater and need to adopt various measures to prevent the basement from floating, such as: increasing the load by covering the basement roof with soil, thickening the basement floor slab to offset the buoyancy, setting anti-pulling piles and anti-pulling steel reinforcement cages to resist the buoyancy of groundwater, etc. Among them, setting anti-pulling piles or anti-pulling steel reinforcement cages is very common. This method mainly uses the side friction resistance of the soil around the pile to resist the water buoyancy.

[0003] To better obtain the side friction resistance of the soil mass around the pile, many engineering and technical personnel have invented cast-in-situ piles with threads around the pile. This pile type has great advantages in improving the side friction resistance. It uses a threaded drill rod with an openable drill bit at the bottom of the drill pipe to drill. After drilling forward to the designed elevation, the movable drill bit is opened, and through the hollow screw rod, super-fluid concrete is injected into the bottom. While injecting the concrete, the drill pipe is rotated and lifted in the reverse direction, and by coordinating the rotation and lifting speeds, a cast-in-situ pile body with threads is formed. Then, a steel reinforcement cage or a steel reinforcement cage is inserted from the upper part of the pile, and finally a full-thread pile or a semi-thread pile is formed. Due to many uncertain factors in the positioning of the post-inserted reinforcement, such as the buried depth of the pile top, the initial setting time of the concrete, and the setting of the steel bar protection layer, the positioning is unreliable.

[0004] Therefore, we have developed a new cast-in-situ concrete screw anti-pulling anchor pile with a prefabricated steel reinforcement cage with an anchor plate at the bottom. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a cast-in-situ concrete screw anti-pulling anchor pile with a prefabricated steel reinforcement cage with an anchor plate at the bottom, which solves the problem of the unreliability of the post-inserted reinforcement of the original screw pile or screw rod pile.

[0007] (2) Technical Solutions

[0008] To achieve the above objectives, the utility model is realized through the following technical solutions: a cast-in-situ concrete screw anti-pulling anchor pile with a prefabricated steel reinforcement cage with an anchor plate at the bottom, including an anti-pulling force screw anchor pile. The interior of the anti-pulling force screw anchor pile is a hollow structure. The interior of the anti-pulling force screw anchor pile is filled with a screw pile concrete pile body. The screw pile concrete pile body is wrapped with a mechanism for enhancing the anti-pulling force. The top of the anti-pulling force screw anchor pile is equipped with a drill rig power box, and a conduit is installed on the top of the drill rig power box.

[0009] Through the above technical solution, a pre-set anchor plate at the bottom can increase the friction area with the soil, improve the adhesion and friction between the steel reinforcement cage and the soil, and thus increase the uplift bearing capacity of the entire screw uplift anchor pile.

[0010] Preferably, the uplift force enhancing mechanism includes a steel reinforcement cage, and a plurality of anchoring steel bars are longitudinally welded to the inner wall of the steel reinforcement cage, and the plurality of anchoring steel bars are arranged in a circumferentially symmetric manner.

[0011] Through the above technical solution, the overall stability and seismic performance of the anchor pile can be improved, making it more stable and reliable under external forces such as earthquakes.

[0012] Preferably, a plurality of reinforcing bars are longitudinally arranged inside the steel reinforcement cage, the plurality of reinforcing bars are arranged linearly and equidistantly, and the reinforcing bars are welded to the anchoring steel bars.

[0013] Preferably, a plurality of concrete protective layers for the steel reinforcement cage are longitudinally arranged outside the steel reinforcement cage, the plurality of concrete protective layers for the steel reinforcement cage are arranged linearly and equidistantly, the concrete protective layers for the steel reinforcement cage are located at the connection of the reinforcing bars and the anchoring steel bars, and the concrete protective layers for the steel reinforcement cage are fixedly connected to the steel reinforcement cage.

[0014] Through the above technical solution, the reinforcement process in on-site construction can be reduced, the labor intensity can be lowered, the construction efficiency can be improved, and the construction cost can be saved.

[0015] Preferably, an anchor plate is arranged at the bottom of the steel reinforcement cage, the anchor plate is located inside the steel reinforcement cage and is fixedly connected to the steel reinforcement cage, and a pile tip is installed at the bottom of the anchor plate.

[0016] Through the above technical solution, the corrosion and erosion of the anchor rod by the soil can be effectively prevented, the service life of the anchor pile can be extended, and the safety and reliability of the project can be ensured.

[0017] Preferably, the shape of the pile tip is any one of a conical shape and a polygonal pyramidal shape.

[0018] Through the above technical solution, for the convenience of drilling, various steel member pile tips such as conical shapes and polygonal pyramidal shapes that are beneficial to drilling can be arranged at the lower part of the anchor plate in this pile type, improving the construction efficiency.

[0019] Preferably, a foundation cap is arranged between the uplift force screw anchor pile and the drilling rig power box, and the uplift force screw anchor pile is threadedly connected through the foundation cap.

[0020] Through the above technical solution, the overall construction is simple, the cost is economical, the construction speed is fast, the positioning is accurate, and the construction quality is easy to guarantee.

[0021] (III) Beneficial effects

[0022] The utility model provides a cast-in-situ concrete screw anti-pull anchor pile with a pre-set anchor plate at the bottom, which has the following beneficial effects:

[0023] Before construction, the utility model pre-inserts a steel reinforcement cage with an anchor plate at the bottom into the middle cavity of the anti-pull screw anchor pile, uses a drilling rig to lift the above-mentioned anti-pull screw anchor pile together with the pre-inserted steel reinforcement cage upright, and screws and presses the drill clockwise to the designed elevation. At the same time, through the concrete injection conduit at the upper part of the anti-pull screw anchor pile, the super-fluid concrete is pressed into the cavity of the anti-pull screw anchor pile. While pressing and filling, the anti-pull screw anchor pile is screwed and lifted counterclockwise, and the concrete is pressed to the designed pile top elevation. This cast-in-situ concrete screw anti-pull anchor pile can completely replace various anti-pull piles in current building foundation projects, with more convenient construction, more obvious cost advantages, and it can also provide greater anti-pull force for the anti-pull pile, thus meeting the requirements of the green construction method of saving materials, energy and land. Description of the drawings

[0024] Figure 1 It is the structural diagram of the anti-pull screw anchor pile of the utility model;

[0025] Figure 2 It is Figure 1 the internal structural diagram of

[0026] Figure 3 It is Figure 1 the partial structural diagram of

[0027] Among them, 1. Anti-pull screw anchor pile; 2. Anchor plate; 3. Steel reinforcement cage; 4. Reinforcing rib; 5. Concrete protective layer of the steel reinforcement cage; 6. Anchor reinforcement; 7. Pile tip; 8. Foundation cap; 9. Concrete pile body of the screw pile; 10. Conduit; 11. Drilling rig power box. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the utility model.

[0029] Embodiment 1:

[0030] Such as Figures 1 to 3As shown, an in-situ cast concrete screw anti-pull anchor pile with a prefabricated bottom anchor plate provided by an embodiment of the present utility model includes an anti-pull force screw anchor pile 1. A foundation cap 8 is arranged between the anti-pull force screw anchor pile 1 and a drilling rig power box 11. The anti-pull force screw anchor pile 1 is threadedly connected through the foundation cap 8, which can reduce the reinforcement process in on-site construction, reduce labor intensity, improve construction efficiency, and save construction costs. The interior of the anti-pull force screw anchor pile 1 is a hollow structure, and the interior of the anti-pull force screw anchor pile 1 is filled with a screw pile concrete pile body 9. The screw pile concrete pile body 9 is wrapped with a lifting anti-pull force mechanism. The lifting anti-pull force mechanism includes a steel reinforcement cage 3, which can improve the overall stability and seismic performance of the anchor pile, making it more stable and reliable under external forces such as earthquakes. A number of steel reinforcement cage concrete protective layers 5 are longitudinally arranged outside the steel reinforcement cage 3. The number of steel reinforcement cage concrete protective layers 5 is linearly arranged at equal distances. The steel reinforcement cage concrete protective layer 5 is located at the connection of the reinforcing bars 4 and the anchoring bars 6. The steel reinforcement cage concrete protective layer 5 is fixedly connected to the steel reinforcement cage 3. An anchor plate 2 is arranged at the bottom of the steel reinforcement cage 3. The prefabricated bottom with the anchor plate 2 can increase the friction area with the soil, improve the adhesion and friction between the steel reinforcement cage 3 and the soil, thereby increasing the anti-pull bearing capacity of the entire screw anti-pull anchor pile 1. The anchor plate 2 is located inside the steel reinforcement cage 3, and the anchor plate 2 is fixedly connected to the steel reinforcement cage 3. A pile tip 7 is installed at the bottom of the anchor plate 2. For the convenience of drilling, various steel component pile tips 7 such as conical and multi-pyramidal shapes that are beneficial to drilling can be arranged below the anchor plate 2 in this pile type to improve construction efficiency. The shape of the pile tip 7 is any one of conical and multi-pyramidal shapes. A number of reinforcing bars 4 are longitudinally arranged inside the steel reinforcement cage 3. The number of reinforcing bars 4 is linearly arranged at equal distances. The reinforcing bars 4 are welded to the anchoring bars 6. A number of anchoring bars 6 are longitudinally welded to the inner wall of the steel reinforcement cage 3. The number of anchoring bars 6 is arranged in a circumferential symmetric distribution, which can effectively prevent the corrosion and erosion of the soil on the anchor rod, extend the service life of the anchor pile, and ensure the safety and reliability of the project. A drilling rig power box 11 is installed at the top of the anti-pull force screw anchor pile 1. A conduit 10 is installed at the top of the drilling rig power box 11. The overall construction is simple, the cost is economical, the construction speed is fast, the positioning is accurate, and the construction quality is easy to guarantee;

[0031] A construction method for an in-situ cast concrete screw anti-pull anchor pile with a prefabricated bottom anchor plate includes the following specific steps:

[0032] S1. Before construction, connect and fix the anchor plate 2, the steel reinforcement cage 3, the reinforcing bars 4, the steel reinforcement cage concrete protective layer 5, the anchoring bars 6, and the pile tip 7 to form a steel reinforcement cage with a bottom anchor plate;

[0033] S2. Place the steel reinforcement cage with a bottom anchor plate made in S1 into the inner cavity of the anti-pull force screw anchor pile 1 in advance. Use the drilling rig to lift the upper anti-pull force screw anchor pile 1 together with the pre-placed steel reinforcement cage with a bottom anchor plate upright. At the same time, rotate the pressure drill clockwise to the design elevation;

[0034] S3. Through the conduit 10 at the top of the drill rig power box 11, grout the concrete under pressure. Meanwhile, under the action of the drill rig power box 11, rotate the anti-pulling force threaded anchor pile 1 clockwise until it reaches the designed elevation;

[0035] S4. Then, the drill rig power box 11 runs in the reverse direction, causing the anti-pulling force threaded anchor pile 1 to rotate counterclockwise. Meanwhile, lift it upward, and the conduit 10 at the top of the drill rig power box 11 continues to grout the concrete under pressure;

[0036] S5. Control the amount of concrete grouted under pressure, rotate and lift the anti-pulling force threaded anchor pile 1, leaving components such as the concrete and the steel reinforcement cage 3 underground, and thus form a pile;

[0037] S6. Move components such as the drill rig to the next pile for construction.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast-in-place concrete threaded anti-pullout anchor pile with a pre-set bottom anchor plate, comprising an anti-pullout threaded anchor pile (1), characterized in that: The interior of the pull-out resistant threaded anchor pile (1) is a hollow structure, the interior of the pull-out resistant threaded anchor pile (1) is filled with a threaded pile concrete pile body (9), the threaded pile concrete pile body (9) is wrapped with a lifting pull-out resistant mechanism, a drilling rig power box (11) is installed at the top of the pull-out resistant threaded anchor pile (1), and a guide tube (10) is installed at the top of the drilling rig power box (11).

2. The pre-installed bottom steel cage cast-in-place concrete threaded anti-pullout anchor pile according to claim 1, characterized in that: The anti-pulling force enhancement mechanism comprises a steel cage (3), a plurality of anchoring steel bars (6) are longitudinally welded to the inner wall of the steel cage (3), and the plurality of anchoring steel bars (6) are arranged in a circumferentially symmetrical distribution.

3. The pre-installed bottom steel cage cast-in-place concrete threaded anti-pullout anchor pile according to claim 2, characterized in that: A plurality of reinforcing ribs (4) are longitudinally arranged inside the steel cage (3), the plurality of reinforcing ribs (4) are linearly arranged at equal distances, and the reinforcing ribs (4) are welded to the anchoring steel bars (6).

4. The cast-in-situ concrete threaded anti-pullout anchor pile with a pre-set bottom anchor plate according to claim 3, characterized in that: A plurality of steel cage concrete protective layers (5) are longitudinally arranged outside the steel cage (3), the plurality of steel cage concrete protective layers (5) are linearly and equidistantly arranged, the steel cage concrete protective layers (5) are located at the connection between the reinforcing bars (4) and the anchoring bars (6), and the steel cage concrete protective layers (5) are fixedly connected to the steel cage (3).

5. The cast-in-place concrete threaded anti-pullout anchor pile with a pre-set bottom anchor plate according to claim 4, characterized in that: An anchor plate (2) is provided at the bottom of the steel cage (3); the anchor plate (2) is located inside the steel cage (3), and the anchor plate (2) is fixedly connected to the steel cage (3); a pile tip (7) is installed at the bottom of the anchor plate (2).

6. The cast-in-situ threaded anti-pullout anchor pile with a pre-set bottom anchor plate and a steel cage according to claim 5, characterized in that: The pile tip (7) is in any one of a conical shape and a polygonal cone shape.

7. The cast-in-situ concrete threaded anti-pullout anchor pile with a pre-set bottom anchor plate according to claim 6, characterized in that: A foundation pedestal (8) is provided between the anti-pulling threaded anchor pile (1) and the drilling rig power box (11), and the anti-pulling threaded anchor pile (1) and the foundation pedestal (8) are connected by a through-thread connection.

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