Reinforcement cage self-adaptive lowering device based on step type self-locking

Abstract

The invention discloses a reinforcement cage self-adaptive lowering device based on stepped self-locking, and relates to the technical field of reinforcement cage lowering, the reinforcement cage self-adaptive lowering device comprises a bearing platform, first pushing slide rails and second pushing slide rails, and the second pushing slide rails are mounted at the four corners of the top end of the bearing platform; a second pushing sliding rail is mounted on the reverse side, close to the first pushing sliding rail, of the top end of the bearing platform, sliding grooves are formed in the second pushing sliding rail and the first pushing sliding rail, limiting supporting frames used for being inserted into the outer side of the reinforcement cage are arranged in the sliding grooves, and a positioning step is mounted at one end of each limiting supporting frame; according to the device, the limiting supporting frame can be pulled backwards to complete contraction / reset of a single-side support in seconds, the positioning step position of the limiting supporting frame is designed to be a sawtooth-shaped step, and compared with a traditional whole beam drawing technology, the operation time is shortened, large hoisting equipment is not needed for cooperation, and the high-altitude heavy object carrying risk is eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel cage lowering, in particular to a steel cage self-adaptive lowering device based on step type self-locking. BACKGROUND

[0002] In the process of drilling and pouring pile steel cage lowering, the commonly used operation mode is to place rigid sleepers (or concrete pads) symmetrically on both sides of the hole as the foundation pile cap, and on these sleepers, a single or a few (usually two) long straight steel members (such as thick steel pipes, I-beams or H-beams) are parallelly erected, which span the entire hole and penetrate the inside of the steel cage (usually through the position of the reinforcing hoop), forming the main temporary support point.

[0003] However, the existing steel cage self-adaptive lowering device based on step type self-locking has the following problems in use: the traditional sleeper + single (few) penetrating steel beam support mode exposes the systematic defects of low operation efficiency, high safety risk, deformation failure hidden danger of the support structure itself and inability to effectively control the position precision of the steel cage in the application scenarios of large diameter, super long and super heavy steel cage. These defects seriously restrict the construction efficiency, threaten the safety of operation, and ultimately affect the quality and reliability of the pile foundation project. Therefore, it is particularly urgent to seek more efficient, safe and reliable steel cage support and lowering technology (such as multi-point automatic chuck system, sectional suspension system, etc.). SUMMARY

[0004] The purpose of the present application is to provide a steel cage self-adaptive lowering device based on step type self-locking to solve the related problems raised in the background.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a steel cage self-adaptive lowering device based on step type self-locking, comprising a pile cap, a first pushing slide rail and a second pushing slide rail, the second pushing slide rail is installed at the four corner positions of the top end of the pile cap, the second pushing slide rail is installed at the opposite side of the first pushing slide rail near the top end of the pile cap, and the inside of the second pushing slide rail and the first pushing slide rail is provided with a sliding groove, the inside of the sliding groove is provided with a limiting support frame for inserting the outside of the steel cage, and one end of the limiting support frame is provided with a positioning step.

[0006] As a preferred scheme of the present application, the pile cap is made of high-strength steel.

[0007] As a preferred scheme of the present application, the inner wall of the pile cap is provided with a stand column, and the bottom end of the pile cap is provided with a scissor support frame connected with the stand column.

[0008] As a preferred scheme of the steel bar cage adaptive lowering device based on the step self-locking, the scissor support frame forms a space truss system with the stand column, so that the overall bending stiffness is increased by 200% to 350%.

[0009] As a preferred scheme of the steel bar cage adaptive lowering device based on the step self-locking, the first pushing slide rail is internally provided with a lifting hole, and the lifting hole is internally provided with a lifting rope.

[0010] As a preferred scheme of the steel bar cage adaptive lowering device based on the step self-locking, the height of the positioning step is greater than or equal to 50 mm, and the inclination angle is 75°.

[0011] The steel bar cage adaptive lowering device based on the step self-locking has the following beneficial effects: 1. The steel bar cage needs to bear a large concentrated load during lowering, the high-strength steel such as H-shaped steel or box beam is welded into a whole platform in the shape of a cross or a grid to replace the traditional single support beam, a cross bracing and a vertical stand column are arranged at the bottom of the platform to form a space stress system, the bending stiffness is improved, the steel bar cage can bear hundreds of tons without the risk of plastic deformation, the weight of the steel bar cage is transmitted to the platform frame through the multi-point support second pushing slide rail, the concentrated load problem of the traditional process is avoided, and the fracture risk of the support beam is completely eliminated.

[0012] 2. The limiting support frame is pulled to the rear side, and unilateral support contraction / positioning can be completed within seconds, the positioning step at the limiting support frame is designed as a zigzag step, compared with the traditional whole beam process, the operation time is shortened, large hoisting equipment is not needed, and the risk of high-altitude heavy object carrying is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a top view and sectional structure schematic diagram of the present application; Fig. 2 It is a front view structure schematic diagram of the present application.

[0014] In the figure: 1, platform; 2, first pushing slide rail; 3, second pushing slide rail; 4, sliding groove; 5, limiting support frame; 6, positioning step; 7, lifting hole; 8, stand column; 9, scissor support frame. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] As shown in Example 1, Figs. 1-2 The present application provides a technical solution: a steel reinforcement cage self-adaptive lowering device based on stepped self-locking, comprising a bearing platform 1, a first pushing sliding rail 2 and a second pushing sliding rail 3, the second pushing sliding rail 3 is installed at the four corner positions of the top end of the bearing platform 1, the inner wall of the bearing platform 1 is provided with a vertical column 8, the bottom end of the bearing platform 1 is provided with a scissor support frame 9 connected with the vertical column 8, the scissor support frame 9 and the vertical column 8 form a space truss system, the overall bending stiffness is improved by 200%~350%, the bearing platform 1 is made of high-strength steel, and needs to bear huge concentrated load when the steel reinforcement cage is lowered, the bearing platform 1 is welded into a whole platform in the shape of a cross or a grid by high-strength steel such as H-shaped steel or box beam, replacing the traditional single support beam, and a cross bracing and a vertical column 8 are arranged at the bottom of the bearing platform 1 to form a space stress system, improving the bending stiffness, and can bear hundreds of tons of steel reinforcement cage without the risk of plastic deformation, the weight of the steel reinforcement cage is transmitted to the platform frame through the multi-point support second pushing sliding rail 3, avoiding the concentrated load problem of the traditional process, and completely eliminating the risk of support beam fracture.

[0017] As shown in Example 2, Figs. 1-2 The present application provides a technical solution: a steel reinforcement cage self-adaptive lowering device based on stepped self-locking, comprising a bearing platform 1, a first pushing sliding rail 2 and a second pushing sliding rail 3, the second pushing sliding rail 3 is installed at the four corner positions of the top end of the bearing platform 1, the inner wall of the bearing platform 1 is provided with a vertical column 8, the bottom end of the bearing platform 1 is provided with a scissor support frame 9 connected with the vertical column 8, the scissor support frame 9 and the vertical column 8 form a space truss system, the overall bending stiffness is improved by 200%~350%, the bearing platform 1 is made of high-strength steel, and needs to bear huge concentrated load when the steel reinforcement cage is lowered, the bearing platform 1 is welded into a whole platform in the shape of a cross or a grid by high-strength steel such as H-shaped steel or box beam, replacing the traditional single support beam, and a cross bracing and a vertical column 8 are arranged at the bottom of the bearing platform 1 to form a space stress system, improving the bending stiffness, and can bear hundreds of tons of steel reinforcement cage without the risk of plastic deformation, the weight of the steel reinforcement cage is transmitted to the platform frame through the multi-point support second pushing sliding rail 3, avoiding the concentrated load problem of the traditional process, and completely eliminating the risk of support beam fracture.

[0018] Working principle: first, the operator can place the bearing platform 1 at the support position of the steel reinforcement cage lowering, and when the steel reinforcement cage is lowered, the operator needs to lower the steel reinforcement cage step by step, pushes the limiting support frame 5 with his hand to drive the positioning step 6 to insert into the outer wall position of the steel reinforcement cage, which is convenient for supporting and lowering, and when the operator needs to remove it, pulls the limiting support frame 5 to the rear side to complete the contraction / reset of the unilateral support within 3 seconds, compared with the traditional whole beam process, the operation time is shortened, large hoisting equipment is not needed, and the risk of high-altitude heavy object handling is eliminated. When the reinforcement cage is lowered, a huge concentrated load needs to be borne. The bearing platform 1 is welded into a whole platform in the shape of a cross or a grid by high-strength steel such as H-shaped steel or box-shaped beams, instead of the traditional single support beam. A spatial stress system is formed by the cross bracing and vertical columns 8 at the bottom of the bearing platform 1, the bending stiffness is improved, and the platform can bear hundreds of tons of reinforcement cage without the risk of plastic deformation. The weight of the reinforcement cage is transmitted to the platform frame through the multi-point support second jacking slide rail 3, avoiding the concentrated load problem of the traditional process, completely eliminating the hidden danger of the fracture of the support beam, and the horizontal sliding resistance is 5 times that of the traditional plane through finite element analysis verification. The displacement of the reinforcement cage under the impact of concrete pouring is less than 2mm (far lower than the limit value of 5cm in the specification).

[0019] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A step self-locking based steel cage adaptive lowering device, comprising a bearing platform (1), a first pushing slide rail (2) and a second pushing slide rail (3), characterized in that: The second pushing slide rail (3) is installed at the four corner positions of the top end of the bearing platform (1), the second pushing slide rail (3) is installed at the opposite side of the first pushing slide rail (2) near the top end of the bearing platform (1), the interior of the second pushing slide rail (3) and the first pushing slide rail (2) is provided with a sliding groove (4), the interior of the sliding groove (4) is provided with a limiting support frame (5) for inserting the outer side of the steel reinforcement cage, and one end of the limiting support frame (5) is provided with a positioning step (6).

2. The step self-locking based reinforcing cage self-adapting lowering device according to claim 1, characterized in that: The bearing platform (1) is made of high-strength steel.

3. The step self-locking based reinforcing cage self-adapting lowering device according to claim 1, characterized in that: The inner wall of the bearing platform (1) is provided with a stand column (8), and the bottom end of the bearing platform (1) is provided with a scissors support frame (9) connected with the stand column (8).

4. The step self-locking based reinforcing cage self-adapting lowering device according to claim 3, characterized in that: The scissors support frame (9) and the stand column (8) form a space truss system, so that the overall bending stiffness is improved by 200% to 350%.

5. The stepped self-locking based reinforcing cage self-adaptive lowering device according to claim 1, characterized in that: The interior of the first pushing slide rail (2) is provided with a lifting hole (7), and the interior of the lifting hole (7) is provided with a lifting rope.

6. The stepped self-locking based reinforcing cage self-adaptive lowering device according to claim 1, characterized in that: The height of the positioning step (6) is greater than or equal to 50 mm, and the inclination angle is 75°.

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