Bridge high pier column climbing frame dismantling method

Abstract

The present application mainly relates to the field of bridge high pier construction, in particular to a bridge high pier climbing frame dismantling method. The method comprises the following eight steps: S1. Frame body falls to the bottom; S2. Small tower crane, corner platform and top beam are dismantled; small tower crane, corner platform and top beam at the top of the climbing frame are sequentially dismantled by using a car crane; S3. Standard column is dismantled; S4. Lower platform triangular support is dismantled, and the lower platform falls; S5. Hydraulic oil cylinder is dismantled; S6. Lower platform is dismantled; S7. Middle platform falls to the bottom; S8. Middle platform and bearing wedge are dismantled. The method utilizes the characteristics that the climbing formwork frame body can fall to the ground for dismantling by itself, and only needs the assistance of a car crane, so that the whole dismantling process is safe and reliable, and the cost is relatively low.

Description

Technical Field

[0001] This invention mainly relates to the field of bridge high pier construction, specifically a method for dismantling a climbing frame for a bridge high pier. Background Technology

[0002] During the construction of high piers, the concrete is poured upwards segment by segment from the ground. At the same time, the working platform and climbing formwork on the outside of the pier are raised synchronously as the construction segments of the high pier are increased. The traditional bridge high pier climbing formwork is dismantled at the bottom of the cap beam (i.e. the top of the high pier), which requires the assistance of a ground-mounted tower crane, and the safety risks of high-altitude dismantling are high. Summary of the Invention

[0003] To solve the above problems, the present invention adopts the following technical solution.

[0004] This invention includes a method for dismantling a climbing scaffold for high bridge piers. The climbing scaffold is installed around the outer perimeter of the high pier and comprises three parts: an upper platform, a middle platform, and a lower platform.

[0005] The upper platform is constructed of a steel frame to form a 2-5 layer working platform. The steel frame includes crossbeams and columns, and the working platform is installed on the crossbeams.

[0006] The middle platform and the lower platform are climbing support platforms, which are connected by hydraulic cylinders; the middle platform and the lower platform are respectively installed on the side of the high pier column by load-bearing wedges, and are both supported and fixed by triangular supports;

[0007] The demolition method includes:

[0008] S1. The frame is lowered to the bottom;

[0009] S2. Remove the small tower crane, corner platform, and top longitudinal beam;

[0010] Using a truck crane, the small tower crane, corner platforms, and top beams on the top of the climbing scaffold were dismantled in sequence.

[0011] S3. Remove the standard columns;

[0012] S4. Remove the triangular support of the lower platform, and the lower platform will fall;

[0013] S5. Remove the hydraulic cylinder;

[0014] S6. Demolition of the lower platform;

[0015] S7. Mid-platform bottoming out;

[0016] S8. Removal of the central platform and load-bearing wedges.

[0017] Furthermore, step S3 includes: using the climbing function of the high pier climbing frame to lower the climbing frame located at the top of the high pier column to the load-bearing wedge at the lowest point of the high pier.

[0018] Further, step S4 includes: maintaining the installation connection between the lower platform and the load-bearing wedge, removing the load-bearing wedge of the lower platform to separate the lower platform from the high pier column, and using the hydraulic cylinder between the lower platform and the middle platform to lower the lower platform to the bottom of the high pier column.

[0019] Further, step S7 includes: installing a hoisting device on the load-bearing wedge, hoisting the middle platform onto the hoisting device, maintaining the installation connection between the load-bearing wedge and the high pier column, removing the load-bearing wedge of the middle platform, and separating the middle platform from the load-bearing wedge; and lowering the lower platform to the bottom of the high pier column using the hoisting device.

[0020] Furthermore, a small tower crane is installed on the top of the upper platform. In this case, step S1 involves using a truck crane to dismantle the small tower crane, the corner platform, and the top beam.

[0021] The beneficial effects of this invention are as follows:

[0022] This method utilizes the characteristic that the climbing formwork can descend to the ground on its own for dismantling, and only requires the assistance of a truck crane. The entire dismantling process is safe, reliable, and inexpensive.

[0023] Compared to tower cranes, truck cranes are much more flexible, saving on the use of lifting space and are suitable for situations where lifting space is limited. Detailed Implementation

[0024] The present invention will now be described in further detail.

[0025] In this invention, the climbing formwork frame is installed around the outer perimeter of the high pier column, and the climbing formwork frame includes three parts: an upper platform, a middle platform, and a lower platform.

[0026] The upper platform is constructed of a steel frame to form a 2-5 layer working platform. The steel frame includes crossbeams and columns, and the platform is installed on the crossbeams. A small tower crane is installed on the top of the steel frame.

[0027] The middle platform and the lower platform are climbing support platforms, which are connected by hydraulic cylinders. The middle platform and the lower platform are respectively installed on the side of the high pier column by load-bearing wedges, and are both supported and fixed by triangular supports.

[0028] A method for dismantling a high bridge pier using a climbing formwork system includes:

[0029] S1. Frame lowering: Utilizing the climbing function of the high pier climbing frame, the climbing frame located at the top of the high pier column is lowered to the load-bearing wedge at the lowest point of the high pier.

[0030] S2. Remove the small tower crane, corner platform, and top longitudinal beam;

[0031] Using a truck crane, the small tower crane, corner platforms, and top beams on the top of the climbing scaffold were dismantled in sequence.

[0032] S3. Remove the standard columns;

[0033] S4. Remove the triangular support of the lower platform and lower the lower platform; maintain the installation connection between the lower platform and the load-bearing wedge, remove the load-bearing wedge of the lower platform to separate the lower platform from the high pier column, and use the hydraulic cylinder between the lower platform and the middle platform to lower the lower platform to the bottom of the high pier column.

[0034] S5. Remove the hydraulic cylinder;

[0035] S6. Demolition of the lower platform;

[0036] S7. Lower the middle platform to the bottom; install a hoisting device on the load-bearing wedge, hoist the middle platform onto the hoisting device, maintain the installation connection between the load-bearing wedge and the high pier column, remove the load-bearing wedge of the middle platform, and separate the middle platform from the load-bearing wedge; use the hoisting device to lower the lower platform to the bottom of the high pier column.

[0037] S8. Removal of the central platform and load-bearing wedges.

[0038] When a small tower crane is installed on the top of the upper platform, step S1 involves using a truck crane to dismantle the small tower crane, the corner platform, and the top beam.

[0039] Through the specific embodiments described above, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A method for dismantling a climbing frame for high bridge piers, characterized in that, The climbing scaffold is installed around the outer perimeter of the high pier column and consists of three parts: an upper platform, a middle platform, and a lower platform. The upper platform is constructed of a steel frame to form a 2-5 layer working platform. The steel frame includes crossbeams and columns, and the working platform is installed on the crossbeams. The middle platform and the lower platform are climbing support platforms, which are connected by hydraulic cylinders; the middle platform and the lower platform are respectively installed on the side of the high pier column by load-bearing wedges, and are both supported and fixed by triangular supports; The demolition method includes the following steps: S1. The frame is lowered to the bottom; S2. Remove the small tower crane, corner platform, and top longitudinal beam; Using a truck crane, the small tower crane, corner platforms, and top beams on the top of the climbing scaffold were dismantled in sequence. S3. Remove the standard columns; S4. Remove the triangular support of the lower platform, and the lower platform will fall; S5. Remove the hydraulic cylinder; S6. Demolition of the lower platform; S7. Mid-platform bottoming out; S8. Removal of the central platform and load-bearing wedges; Step S4 includes: maintaining the installation connection between the lower platform and the load-bearing wedge, removing the load-bearing wedge of the lower platform to separate the lower platform from the high pier, and using the hydraulic cylinder between the lower platform and the middle platform to lower the lower platform to the bottom of the high pier. Step S7 includes: installing a hoisting device on the load-bearing wedge, hoisting the middle platform onto the hoisting device, maintaining the installation connection between the load-bearing wedge and the high pier column, removing the load-bearing wedge of the middle platform, and separating the middle platform from the load-bearing wedge; and lowering the middle platform to the bottom of the high pier column using the hoisting device.

2. The method for dismantling a high bridge pier climbing frame according to claim 1, characterized in that, Step S1 includes: using the climbing function of the high pier climbing frame to lower the climbing frame located at the top of the high pier column to the load-bearing wedge at the lowest point of the high pier.

3. The method for dismantling a high bridge pier climbing frame according to claim 1, characterized in that, A small tower crane is installed on the top of the upper platform. At this time, step S2 is to use a truck crane to dismantle the small tower crane, the corner platform and the top beam.