Reinforced reinforcement cage suitable for expanded disc pile

Abstract

A reinforced reinforcement cage suitable for an expanded disc pile comprises a reinforcement cage body and a force bearing disc reinforcement device, the reinforcement cage body comprises a main reinforcement and a spiral stirrup, the force bearing disc reinforcement device comprises a connecting component, a rubber ring, a plurality of joint bars and a check ring, the connecting component is a smooth steel bar circular ring, and the peripheral edge of the steel bar circular ring is tangent to the interior of the main reinforcement. The joint bars are sequentially connected in series through the circular rings at the upper ends of the joint bars, the lower ends of the joint bars are fixed to the main bars through the rubber rings, and the check ring is arranged on the middle plane of the force bearing disc. The reinforcement cage is provided with the force bearing disc reinforcement device to improve the structural strength of the formed force bearing disc, the joint bars expand outwards in the radial direction of the reinforcement cage and correspond to the positions, used for forming the force bearing disc, of the reinforcement cage, reinforcing steel bars are added to the positions where the force bearing disc is formed compared with the prior art, and therefore the structural strength of the force bearing disc is improved; the structure is simple, the anti-shearing performance of the bearing disc can be improved, and the defect that the junction of the bearing disc and the pile body is prone to breakage is overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of expanded-plate piles, and in particular relates to a reinforced steel cage suitable for expanded-plate piles. Background Art

[0002] Expanded plate piles are a type of special-shaped piles that are squeezed and expanded at appropriate depths of bored cast-in-place piles of equal cross-section to form "branches" or "load-bearing plates" using special equipment. Compared to ordinary cast-in-place piles, expanded plate piles have higher pull-out and compression resistance, so expanded plate piles have been widely used in engineering construction in recent years. However, due to the limitations of the pile-making process, expanded plate piles often use the reinforcement method of ordinary cast-in-place piles, where only the main body of the expanded plate pile body is reinforced, and the load-bearing plate is not separately reinforced and is only poured with concrete. The prior art discloses an expanded branch plate pile foundation for power transmission lines, in which only steel bars that penetrate the pile body are arranged on the pile body, and the upper and lower symmetrical conical load-bearing plates and the pile body are integrally cast by concrete.

[0003] When the expanded plate pile is subjected to vertical load, the bearing plate will be squeezed and sheared by the soil above or below the plate, which will cause cracks between the plate and the pile body and damage the bearing capacity of the pile body. In order to resist this shearing effect, the bearing plate often needs to increase the height of the plate and make the cross section of the bearing plate into a triangle, which not only limits the size of the bearing plate, but also increases the amount of concrete used.

[0004] In order to overcome this defect, the prior art discloses a support ring that can move up and down in the steel cage of the pile, on which the inserted steel bar is hinged and two steel wires are symmetrically installed, and a fixed guide tube is welded on the main steel bar. When in use, the support ring is adjusted to move up and down by manually pulling the steel wire, so that the inserted steel bar enters the annular disc on the side wall of the pile body under the guidance of the guide tube. However, the above utility models are relatively complex in structure, the construction is relatively cumbersome, the workers are difficult to operate, and the technical requirements are high, making it difficult to ensure construction efficiency.

[0005] The prior art discloses a branch plate pile and a reinforcement method. The steel cage of the expanded plate pile includes main bars, stirrups and bearing plate steel bars. The main bars extend in the vertical direction. The stirrups are annular and fixed to each main bar. The bearing plate steel bars are composed of a vertical fixed section and a bearing plate section. The vertical fixed section is welded and fixed to the corresponding stirrups. The bearing plate section and the steel cage correspond to the position used to form the bearing plate. The steel cage is extruded by an extrusion and expansion device to expand radially outward along the steel cage. Although the structure of the utility model is relatively simple, it is necessary to weld the bearing plate steel fixed section to the corresponding stirrups. When the pile body has multiple bearing plates, the steel bars on the upper part of the pile body will be too densely distributed, which violates the construction specifications. Utility Model Content

[0006] In order to overcome the above shortcomings, the utility model provides a reinforced steel cage suitable for expanded plate piles, which can increase the overall stiffness of the bearing plate and the bearing capacity of the pile foundation, and the construction process is simple and easy for workers to use, which can greatly improve the construction efficiency and meet the working conditions of the pile body with multiple bearing plates.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A reinforced steel cage suitable for expanded plate piles, comprising a steel cage and a bearing plate reinforcement device, wherein the steel cage comprises main bars and spiral hoops, and the bearing plate reinforcement device comprises a connecting member, a rubber ring, a plurality of dowels and a blocking ring, wherein the connecting member is a smooth steel ring, the outer peripheral edge of the steel ring is tangent to the inside of the main bar, a plurality of dowels are sequentially connected in series through the ring at the upper end of the dowel, the lower end of the dowel is fixed to the main bar through the rubber ring, and the blocking ring is arranged in the middle plane of the bearing plate, the outer peripheral edge of the blocking ring is tangent to the inside of the main bar, and is fixed to the main bar by welding.

[0009] For further optimization, the inner diameter of the steel bar ring should be smaller than the inner diameter of the connecting member.

[0010] Further optimization, the outer diameter of the connecting member is smaller than the diameter of the inscribed circle of the main reinforcement, ensuring that the connecting member can move freely up and down inside the steel cage, and its outer diameter is larger than the inner diameter of the blocking ring, which is used to limit the connecting member.

[0011] Further optimization is that the number of the rubber rings is the same as the number of the inserted reinforcements, and the inner diameter of the rubber ring is smaller than the diameter of the main reinforcement.

[0012] Further optimization, the inserted reinforcement is a spiral reinforcement.

[0013] The beneficial effects of the utility model are:

[0014] 1. During the manufacturing process of the expanded plate pile reinforcement cage, an expanded plate pile reinforcement device is set at the position corresponding to the bearing plate body, and the expanded plate pile reinforcement device is in the initial state, and the lower end of the inserted bar is fixed by a rubber ring, so that the free end of the inserted bar is in a constrained state and does not affect the lowering of the reinforcement cage; when the reinforcement cage is placed at the specified position, the reinforcement device is moved downward as a whole through the extrusion device, and the free end of the inserted bar is opened until the rubber ring and the connecting member are blocked by the blocking ring;

[0015] 2. The steel cage of the utility model is provided with a bearing plate reinforcement device to improve the structural strength of the bearing plate after forming. By inserting reinforcement bars along the radial outward expansion of the steel cage, corresponding to the position of the steel cage used to form the bearing plate, the position of the formed bearing plate is increased with reinforcing steel bars compared with the prior art, thereby improving the structural strength of the bearing plate; the overall structure is simple, can improve the shear resistance of the bearing plate, and overcome the defect of easy fracture at the junction of the bearing plate and the pile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the initial state structure of the utility model;

[0017] Figure 2 Schematic diagram of the initial state of the steel cage;

[0018] Figure 3 It is a schematic diagram of the structure of the terminal state of the utility model;

[0019] Figure 4 This is a schematic diagram of the final state of the steel cage;

[0020] Figure 5 This is a schematic diagram of the initial state of the support plate reinforcement;

[0021] Figure 6 This is a schematic diagram of the final state of the support plate reinforcement;

[0022] Figure numerals: 1. expanded plate pile, 2. steel cage, 3. main reinforcement, 4. spiral stirrups, 5. pile hole, 6. load-bearing plate, 7. connecting member, 8. rubber ring, 9. inserted reinforcement, 10. blocking ring, 11. circular ring. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is described in detail below in conjunction with specific embodiments. The following embodiments are implemented based on the technical scheme of the utility model, and detailed implementation methods and specific operating procedures are given. However, the utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the utility model is not limited to the following embodiments.

[0024] A reinforced steel cage suitable for expanded plate piles, comprising a steel cage 2 and a bearing plate reinforcement device, wherein the steel cage 2 comprises main bars 3 and spiral hoops 4, and the bearing plate reinforcement device comprises a connecting member 7, a rubber ring 8, a plurality of inserted bars 9 and a blocking ring 10, wherein the connecting member 7 is a smooth steel ring, and the outer peripheral edge of the steel ring is tangent to the inside of the main bar 3, and the inner diameter of the steel ring should be smaller than the inner diameter of the connecting member 7, and the outer diameter of the connecting member 7 is smaller than the diameter of the inscribed circle of the main bar 3, so as to ensure that the connecting member 7 can move freely up and down inside the steel cage 2, and the outer diameter of the connecting member 7 is larger than the inner diameter of the blocking ring 10, so as to play a blocking role, so as to ensure that the reinforcement device stops moving at the bearing plate position, prevent the reinforcement device from moving down too much to cause the inserted bars to shrink in the opposite direction, and ensure that the inserted bars 9 are expanded outward to the optimal state.

[0025] The plurality of inserted bars 9 are connected in series in sequence through the circular ring 11 at the upper end of the inserted bars 9, and the lower end of the inserted bars 9 is fixed on the main bars 3 through the rubber ring 8. The number of rubber rings 8 is the same as the number of inserted bars 9. The number of inserted bars is adjusted according to actual needs. The number of inserted bars that is the same as the number of main bars 3 can be used, or one inserted bar 9 can be set every two main bars 3. The length of the inserted bars 9 can be adjusted according to the size of the plate to meet different construction needs. The inner diameter of the rubber ring 8 is smaller than the diameter of the main bar 3. The inserted bars 9 are spiral steel bars, and the blocking ring 10 is set in the middle plane of the bearing plate 6. In the initial state, the rubber ring 8 ensures that the lower end of the inserted bars 9 is constrained on the main bars, ensuring that the steel cage is smoothly lowered to the designated position; when the reinforcement device moves downward, the movement of the inserted bars is restricted so that the inserted bars expand outward around the main bars.

[0026] Working process:

[0027] The steel cage 2 is suspended down to the pile hole 5, and the lower end of the inserted rebar 9 is constrained by the rubber ring 8 so that the lower end of the inserted rebar 9 does not exceed the pile hole wall to ensure that the steel cage 2 is lowered to a suitable position. The extrusion device contacts the connecting member 7 from the inside of the steel cage 2, so that the extrusion head evenly squeezes the connecting member 7 downward, and the rubber ring 8 and the inserted rebar 9 also move downward accordingly. At the same time, the lower end of the inserted rebar 9 slowly opens outward in an umbrella shape. When the connecting member 7 and the rubber ring 8 are blocked by the blocking ring 10, the inserted rebar 9 is completely opened outward, thereby achieving the purpose of reinforcing the bearing plate of the expanded plate pile.

[0028] The steel cage of the utility model is provided with a bearing plate reinforcement device to improve the structural strength of the bearing plate after being formed. By inserting the reinforcement 9 along the radial outward expansion of the steel cage 2, corresponding to the position of the steel cage 2 used to form the bearing plate 6, the position of the formed bearing plate 6 is increased by reinforcing steel bars compared with the prior art, thereby improving the structural strength of the bearing plate 6; the overall structure is simple, can improve the shear resistance of the bearing plate 6, and overcome the defect that the bearing plate 6 is easily broken at the junction with the pile body.

[0029] The above shows and describes the main features, methods of use, basic principles and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements according to actual conditions, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A reinforced steel cage suitable for an expanded plate pile, comprising a steel cage (2) and a bearing plate reinforcement device, wherein the steel cage (2) comprises main bars (3) and spiral stirrups (4), and is characterized in that: The bearing plate reinforcement device comprises a connecting member (7), a rubber ring (8), a plurality of inserted bars (9) and a blocking ring (10), wherein the connecting member (7) is a smooth steel bar ring, the outer peripheral edge of the steel bar ring is tangent to the inside of the main bar (3), the plurality of inserted bars (9) are sequentially connected in series through a ring (11) at the upper end of the inserted bars (9), the lower end of the inserted bars (9) is fixed to the main bar (3) through the rubber ring (8), and the blocking ring (10) is arranged on the middle plane of the bearing plate (6), the outer peripheral edge of the blocking ring (10) is tangent to the inside of the main bar, and is fixed to the main bar by welding.

2. A reinforced steel cage suitable for expanded piles as claimed in claim 1, characterized in that: The inner diameter of the steel bar ring should be smaller than the inner diameter of the connecting member (7).

3. A reinforced steel cage suitable for expanded piles as claimed in claim 1, characterized in that: The outer diameter of the connecting member (7) is smaller than the diameter of the inscribed circle of the main reinforcement (3), ensuring that the connecting member (7) can move freely up and down inside the reinforcement cage (2); the outer diameter of the connecting member (7) is larger than the inner diameter of the blocking ring (10), which is used to limit the position of the connecting member (7).

4. A reinforced steel cage suitable for expanded piles as claimed in claim 1, characterized in that: The number of the rubber rings (8) is the same as the number of the inserted reinforcements (9), and the inner diameter of the rubber ring (8) is smaller than the diameter of the main reinforcement (3).

5. A reinforced steel cage suitable for expanded piles as claimed in claim 1, characterized in that: The inserted reinforcement (9) is a spiral reinforcement.

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