Safety protection platform for removing inner formwork of variable-cross-section hollow pier and using method of safety protection platform

Abstract

The invention discloses a safety protection platform for removing an inner template of a variable-cross-section hollow pier and a use method of the safety protection platform, belongs to the field of construction of variable-cross-section hollow piers, and solves the problems that a traditional scaffold operation platform is complex in construction, high in removing difficulty and high in safety risk. The cross-section-variable hollow pier comprises a telescopic steel framework and a telescopic combined mesh, the combined mesh is connected to the steel framework to form a platform body, and the platform body is placed on an existing opposite-pull screw on the side wall of the cross-section-variable hollow pier. The using method comprises installing the safety net; the relative positions of the end steel ribs and the main steel ribs are adjusted according to the dismantling position size, and the steel skeleton is formed through fastening connection; the side meshes are spliced on the periphery of the main mesh according to the size of a dismounting position to form a combined mesh, and the combined mesh is fixed on the steel framework to form a platform main body; the platform main body is placed on the existing opposite-pull screw rod, so that the inner template can be dismounted; and the inner formworks are sequentially dismantled in this way. The internal construction space of the hollow pier is effectively increased, and the construction efficiency and the disassembly and assembly convenience are improved.

Description

Technical Field

[0001] The invention belongs to the field of construction of hollow piers with variable cross-sections, and in particular relates to a safety protection platform for removing internal formwork of hollow piers with variable cross-sections and a use method thereof. Background Art

[0002] During the construction of high piers on high-speed railways, the traditional method of thin-walled hollow pier construction is to set up a working platform on the outer formwork and use steel pipes to build a scaffolding working platform on the inner formwork. The construction process is complicated, the space is limited, the scaffolding is difficult to dismantle, the work efficiency is low, and the safety risks are high. Summary of the invention

[0003] The purpose of the present invention is to provide a safety protection platform for removing the inner formwork of a variable-section hollow pier, so as to solve the problems of complex construction, great difficulty in dismantling and great safety risks of traditional scaffolding work platforms.

[0004] Another object of the present invention is to provide a method for using a safety protection platform for removing the inner formwork of a variable-section hollow pier.

[0005] The technical solution of the present invention is: a safety protection platform for removing the internal formwork of a variable-section hollow pier, comprising a retractable steel frame and a retractable combined mesh, the combined mesh is connected to the steel frame to form a platform body, and the platform body is placed on the existing tension screws on the side wall of the variable-section hollow pier.

[0006] As a further improvement of the present invention, a safety net is provided below the platform body, and the safety net can be detachably installed on the existing tension screw rods.

[0007] As a further improvement of the present invention, the steel skeleton is formed by telescopic steel frames connected vertically and horizontally. The telescopic steel frames are composed of main steel frames and end steel frames. The end steel frames are inserted at both ends of the main steel frames. Fixing holes are provided on the end steel frames and the main steel frames. Fastening bolts are provided between the fixing holes of the end steel frames and the fixing holes of the main steel frames.

[0008] As a further improvement of the present invention, the combined mesh is composed of a main mesh and a side mesh, the main mesh is welded to the main steel frame, and the side mesh is connected to the main mesh and the steel frame.

[0009] As a further improvement of the present invention, a hanging point is provided on the main steel frame.

[0010] A method for using a protective platform for removing an inner formwork of a variable-section hollow pier, comprising the following steps: A. Install the safety net on the existing tension screws at the position where the formwork is removed in the hollow pier with variable cross-section; B. Adjust the relative position of the end steel frame and the main steel frame according to the size of the dismantling position of the variable-section hollow pier, and then pass the fastening bolts through the relative fixing holes of the end steel frame and the main steel frame to fasten the end steel frame and the main steel frame to form a steel skeleton; C. According to the size of the variable-section hollow pier to be dismantled, the side mesh is spliced ​​around the main mesh to form a combined mesh, and the side mesh is fixedly connected to the main mesh and the steel frame to form the platform body; D. Hoist the platform body to the dismantling position of the variable-section hollow pier and place it on the existing tension screws, and then dismantle the formwork in the dismantling position; E. Follow the methods in steps B and C, and adjust the steel frame and combined mesh to form the platform body according to the size of the next demolition position. Hoist the platform body onto the existing tension screws at the next demolition position, and simultaneously adjust the installation position of the safety net. Then, remove the inner formwork at the demolition position. Remove the inner formwork in this way.

[0011] The beneficial effects of the present invention are as follows: the platform body in the present invention is retractable as a whole, the steel frame and the combined mesh can be flexibly adjusted according to the inner size of the variable-section hollow pier, the operation is convenient, the platform body is flexible to move, and can be disassembled and used repeatedly. The present invention uses the existing tension screws on the side wall of the variable-section hollow pier to place the platform body, and suspends a safety net under the platform body, providing a safe and reliable working space for construction personnel. The safety protection platform for removing the internal formwork of the variable-section hollow pier of the present invention effectively increases the internal construction space of the hollow pier, improves the construction efficiency and the convenience of disassembly and assembly of the protection platform. The method of use of the present invention is simple, efficient, and quick, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a safety protection platform for removing the inner formwork of a hollow pier with a variable cross-section according to the present invention; Figure 2 It is an exploded schematic diagram of the platform body in the present invention; Figure 3 yes Figure 1 AA view in; Figure 4 yes Figure 1 BB view in.

[0013] In the figure: 1-combined mesh; 11-main mesh; 12-edge mesh; 2-existing tension screws; 3-steel skeleton; 31-main steel frame; 32-end steel frame; 5-fixing hole; 6-safety net; 8-hanging point. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Embodiment 1, like Figure 1-4 As shown, a safety protection platform for removing the internal formwork of a variable-section hollow pier includes a retractable steel frame 3 and a retractable combined mesh 1. The combined mesh 1 is connected to the steel frame 3 to form a platform body, and the platform body is placed on the existing tension screws 2 on the side wall of the variable-section hollow pier.

[0016] A safety net 6 is provided under the platform body as secondary protection, and the safety net 6 can be detachably installed on the existing tension screw rod 2.

[0017] The steel skeleton 3 is formed by telescopic steel frames connected vertically and horizontally. The telescopic steel frames are composed of main steel frames 31 and end steel frames 32. The end steel frames 32 are inserted at both ends of the main steel frames 31. Fixing holes 5 are opened on the end steel frames 32 and the main steel frames 31. Fastening bolts are provided between the fixing holes 5 of the end steel frames 32 and the fixing holes 5 of the main steel frames 31.

[0018] The combined mesh 1 is composed of a main mesh 11 and a side mesh 12 . The main mesh 11 is welded to the main steel skeleton 31 , and the side mesh 12 is connected to the main mesh 11 and the steel skeleton 3 .

[0019] A suspension point 8 is provided on the main steel frame 31 .

[0020] The inner mold size of the variable-section hollow pier bottom is 500cm×1100cm, the size of the pier top is 480cm×880cm, the pier column wall thickness is 50cm, and the specification of the existing tension screw 2 is φ32mm.

[0021] The steel frame 3 is composed of 3 transverse telescopic steel frames and 4 longitudinal telescopic steel frames, and the main steel frame 31 is connected by welding, and is fully welded on both sides. The main steel frame 31 and the end steel frame 32 are made of channel steel.

[0022] The main mesh 11 and the side mesh 12 are made by welding φ10mm steel bars, with a horizontal and vertical spacing of 10cm.

[0023] Safety net 6 is equipped with at least 8 hanging points.

[0024] Here’s how to use it: A. Install a safety net 6 on the existing tension screw 2 at the position where the formwork is removed in the hollow pier with a variable cross-section; B. Adjust the relative position of the end steel frame 32 and the main steel frame 31 according to the size of the dismantling position of the variable-section hollow pier, and then pass the fastening bolts through the fixing holes 5 opposite to the end steel frame 32 and the main steel frame 31 to fasten the end steel frame 32 and the main steel frame 31 to form a steel skeleton 3; C. According to the size of the variable-section hollow pier to be dismantled, the side mesh 12 is spliced ​​around the main mesh 11 to form a combined mesh 1, and the side mesh 12 is fixedly connected to the main mesh 11 and the steel frame 3 by U-shaped bolts to form the platform body; D. Lift the platform body to the dismantling position at the lower end of the variable-section hollow pier through the lifting point 8 and place it on the existing tension screw 2, and then remove the formwork in the dismantling position; a tower crane can be used for lifting; E. According to the method of steps B and C, adjust the steel skeleton 3 and the combined mesh 1 again according to the size of the next demolition position to form the platform body, hoist the platform body onto the existing tension screw 2 at the next demolition position, and simultaneously adjust the installation position of the safety net 6, and then remove the inner formwork at the demolition position; in this way, remove the inner formwork from bottom to top.

[0025] The present invention effectively solves the problems of limited space, low efficiency, complex construction of scaffolding work platform and great difficulty in dismantling the inner formwork of the current hollow pier, and improves the safety of dismantling the inner formwork in high pier construction.

Claims

1. A safety protection platform for removing the inner formwork of a hollow pier with a variable cross-section, characterized in that: It comprises a retractable steel frame (3) and a retractable combined mesh (1), wherein the combined mesh (1) is connected to the steel frame (3) to form a platform body, and the platform body is placed on the existing tension screws (2) on the side wall of the hollow pier with a variable cross-section.

2. According to claim 1, a safety protection platform for removing the inner formwork of a hollow pier with a variable cross-section, characterized in that: A safety net (6) is provided below the platform body, and the safety net (6) is detachably mounted on the existing tensioning screw rods (2).

3. A safety protection platform for removing the inner formwork of a hollow pier with a variable cross-section according to claim 2, characterized in that: The steel skeleton (3) is formed by connecting telescopic steel frames in a longitudinal and transverse manner. The telescopic steel frames are composed of a main steel frame (31) and an end steel frame (32). The end steel frame (32) is plugged into the two ends of the main steel frame (31). Both the end steel frame (32) and the main steel frame (31) are provided with fixing holes (5). Fastening bolts are provided between the fixing holes (5) of the end steel frame (32) and the fixing holes (5) of the main steel frame (31).

4. The variable cross-section hollow pier inner formwork removal safety protection platform according to claim 3 is characterized by: The combined mesh (1) is composed of a main mesh (11) and a side mesh (12); the main mesh (11) is welded to the main steel frame (31), and the side mesh (12) is connected to the main mesh (11) and the steel frame (3).

5. The variable cross-section hollow pier inner formwork removal safety protection platform according to claim 4, characterized in that: The main steel frame (31) is provided with a suspension point (8).

6. A method for using the protective platform for removing the inner formwork of a variable cross-section hollow pier according to claim 4, characterized in that The following steps are involved: A. Install a safety net (6) on the existing tension screws (2) at the position where the formwork is removed in the variable-section hollow pier; B. adjusting the relative position of the end steel frame (32) and the main steel frame (31) according to the size of the dismantling position of the variable-section hollow pier, and then passing the fastening bolts through the fixing holes (5) of the end steel frame (32) and the main steel frame (31) to fasten the end steel frame (32) and the main steel frame (31) to form a steel skeleton (3); C. splicing the side mesh (12) around the main mesh (11) according to the size of the variable-section hollow pier to be dismantled to form a combined mesh (1), and fixing the side mesh (12) to the main mesh (11) and the steel frame (3) to form a platform body; D. Hoist the platform body to the dismantling position of the variable-section hollow pier and place it on the existing tension screw (2), and then dismantle the formwork in the dismantling position; E. According to the method of steps B and C, the steel frame (3) and the combined mesh (1) are adjusted again according to the size of the next demolition position to form the platform body, and the platform body is hoisted and placed on the existing tension screws (2) at the next demolition position, and the installation position of the safety net (6) is adjusted simultaneously, and then the inner formwork at the demolition position is removed; the inner formwork is removed in this way in sequence.

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