KR102733206B1 - Pier column work platform provided with fail-safe function and method of constructing pier column using the same - Google Patents

Abstract

A pier work bench with a fail-safe function is disclosed. The pier work bench with a fail-safe function according to the present invention includes an inner frame provided adjacent to a pier, an outer frame connected to the inner frame through a support member, and a handle member at an end of the outer frame, wherein the inner frame is fastened by a fastening member including a bolt or a buckle.

Description

{PIER COLUMN WORK PLATFORM PROVIDED WITH FAIL-SAFE FUNCTION AND METHOD OF CONSTRUCTING PIER COLUMN USING THE SAME}

The present invention relates to a bridge pier work platform having a fail-safe function and a bridge pier construction method using the same. The present invention relates to a bridge pier work platform having a fail-safe function, which prevents a sudden fall of a bridge pier work platform during the process of constructing a bridge pier or dismantling the bridge pier work platform, thereby ensuring safe work and facilitating dismantling, and a bridge pier construction method using the same.

In general, the piers that support bridges form a coping on the final segment of the column and then support the bridge deck. The conventional method of constructing such pier copings is to complete the final segment of the pier column, expose the column reinforcing bars of the pier, and have a crane continuously standby for work, while the crane lifts the reinforcing bars and formwork to be used for the coping to the top of the column, and assemble the reinforcing bars and formwork at high altitudes.

In order to construct a pier to be installed underneath the superstructure such as a bridge beam or slab, a number of reinforcing bars must be placed vertically, and then concrete must be poured and cured. Therefore, a process of installing temporary formwork around the outer perimeter of the pier is inevitably involved.

The conventional construction method for pier columns up to now has been to use a pair of semi-cylindrical steel formwork as shown in Fig. 1a, assemble it, place reinforcing bars inside it, and then pour concrete to extend it upward.

In the past, when constructing a concrete pier column of a certain height, a high-rise work platform, so-called scaffolding, on which workers would step and stand to work was installed upright around the pier column being constructed, and while several workers stood on the scaffolding, they moved materials such as reinforcing bars or formwork with a tower crane, etc., and installed them by hand from the left and right sides or assembled and disassembled them to work. In addition, during erection, temporary scaffolding was installed around the pier under construction so that workers could climb up to the work platform using the temporary scaffolding.

In the conventional construction method of bridge piers using scaffolding frames, pipes were arranged horizontally or vertically and clamps were used to tie the pipes together at their intersections to create a scaffolding frame. Therefore, the scaffolding frame assembled in this way does not have sufficient strength, so it shakes when workers move heavy materials such as formwork or rebar on the scaffolding frame. When the scaffolding frame that workers step on and work on shakes, there is a risk that the workers standing on it will also shake and fall. In particular, in the conventional construction method of bridge piers, when dismantling semicircularly interlocked formwork segments as shown in Figs. 1b and 1c, accidents frequently occurred in which workers fell due to the gap between the bridge pier and the formwork widening when dismantling the horizontal bolts that tie the formwork segments.

Accordingly, there is a need for a pier column work platform that is easy to manufacture and install and can prevent safety accidents in case of a fall.

The present invention has been made to solve the problems of the above-mentioned prior art, and provides a pier column work bench equipped with a fail-safe function that prevents a sudden fall of a pier column work bench during the process of constructing a pier column or dismantling the pier column work bench, thereby ensuring safe work and facilitating dismantling, and a pier column construction method using the same.

In order to solve the aforementioned technical problem, a pier work bench equipped with a fail-safe function according to the present invention comprises: a pier work bench formed through a retaining formwork; a pier work bench provided to wrap around the perimeter of the pier work bench according to the shape of the pier work bench; wherein the pier work bench includes an inner frame provided adjacent to the pier work bench; an outer frame connected to the inner frame through a support; and a handle provided at an end of the outer frame; and the inner frame is fastened by a fastening member including a bolt or a buckle.

The wire is characterized in that it penetrates the center of the inner frame and is spaced apart from the center of the inner frame, and the wire forms a concentric circle with the pier column.

The above wire is provided on the outside of the above fastening portion, and a wire through hole is provided at an end of the inner frame adjacent to the inner frame.

The above outer frame is characterized by having an expansion arm provided on one side to form an unbalanced moment when the pier column work platform falls, thereby causing wall friction on the inner frame on the other side.

The above extension arm is characterized by including: a hinge portion provided at an upper portion of the handle portion; a main body portion extended through the hinge portion to correspond to the height of the handle portion; and a weight provided at an end of the main body portion.

The above-mentioned expansion arm is characterized in that, when the above-mentioned pier column work platform is dropped and rotates due to an unbalanced moment, the above-mentioned expansion arm rotates radially from the center of the above-mentioned pier column when viewed in plan.

The above-mentioned expansion arm is characterized in that when the pier column work platform falls and rotates due to an unbalanced moment, it rotates radially from the center of the pier column and generates a greater unbalanced moment, thereby preventing the pier column work platform from falling due to greater friction.

The above-mentioned pier column work bench is characterized in that it is provided in multiple units spaced apart by a preset height according to the height of the pier column.

According to another embodiment of the present invention for solving the above-mentioned technical problem, a method for constructing a pier using a pier working platform having a fail-safe function comprises: a first construction step of setting a retaining form on the upper part of a pier foundation and connecting it to the pier foundation and providing a working tower at a preset height; a second construction step of providing a first pier working platform of one stage adjacent to the working tower; a third construction step of providing a retaining form on the upper part of the retaining form and connecting it to the lower form; and a fourth construction step of forming the working tower high and providing two stages of the second pier working platforms on the upper part of the retaining form provided at the upper part.

In the first construction step or the third construction step, a step is provided for pouring concrete into the interior of the formwork after setting the formwork, and the formwork that is not connected in advance and the adjacent formwork are connected by concrete adhesive and a preset pressure.

According to the present invention, the weight of the extension arm provided on one side of the pier column work platform can be provided with a preset weight to prevent weight imbalance with the worker on the opposite side, and even if the pier column work platform inevitably falls, the size of the unbalanced moment can be further increased because the extension arm rotates and expands around the hinge portion, so that the frictional force of the inner frame on the other side increases further when falling, thereby stopping the fall of the pier column work platform.

Figure 1a is a schematic diagram showing a bridge pier construction method according to conventional technology.
Figures 1b and 1c are schematic diagrams showing accidents that may occur during the dismantling of steel formwork during bridge pier construction according to the prior art.
Figures 2a to 2c are schematic diagrams showing a method of constructing a pier using a pier workbench equipped with a fail-safe function according to an embodiment of the present invention.
Figures 3a and 3b are conceptual diagrams of a bridge pier work platform equipped with a fail-safe function according to the present invention.
Figure 4 is a side view of a bridge pier work platform equipped with a fail-safe function according to the present invention.
Figure 5 is a plan view showing a bridge pier work platform equipped with a fail-safe function according to the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts that are not related to the description are omitted, and similar parts are assigned similar drawing reference numerals throughout the specification.

Throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

Hereinafter, a bridge pier work platform equipped with a fail-safe function according to the present invention will be described in detail with reference to the drawings.

FIGS. 2A to 2C are schematic diagrams showing a method for constructing a pier using a pier work bench having a fail-safe function according to an embodiment of the present invention, FIGS. 3A and 3B are conceptual diagrams of a pier work bench having a fail-safe function according to the present invention, FIG. 4 is a side view of a pier work bench having a fail-safe function according to the present invention, and FIG. 5 is a plan view showing a pier work bench having a fail-safe function according to the present invention.

A pier work bench equipped with a fail-safe function according to the present invention is provided to wrap around a pier (30) formed through a formwork, according to the shape of the pier (30), and a body part (110) of the pier work bench basically includes an inner frame (111) provided adjacent to the pier (30), an outer frame (113) connected to the inner frame (111) through a support part (117), and a handle part (120) provided at an end of the outer frame (113), and the inner frame (111) can be fastened by a fastening part (140) including a bolt or a buckle.

The pier column work benches can be provided in multiple units spaced apart by a preset height according to the height of the pier column (30).

When the pier column (30) is provided with a circular cross section, the inner frame (111) is provided in multiple pieces to surround the pier column (30) in a circular shape corresponding to the shape of the circular pier column (30), and the outer frame (113) is provided with a large arc length on one side (the outer side opposite to the other side) and a small arc length on the other side (the part adjacent to the inner frame), but the central angle can be provided to be the same as that of the inner frame (111).

The outer frame (113) may be provided with a plurality of modules, but may be provided in an overall donut shape. A support member (117) connecting the inner frame (111) and the outer frame (113) may be provided radially from the center of the pier (30) between the inner frame (111) and the outer frame (113).

At both ends of the inner frame (111), a fastening member (140), such as a bolt or buckle, may be provided for connecting and fixing to an adjacent inner frame (111).

A wire (130) penetrates the center of the inner frame (111) and is spaced apart, and the wire (130) forms a concentric circle with the pier column (30). That is, the inner frame (111) can be provided in a donut shape to surround the pier column (30), and the first inner frame (111a) and the second inner frame (111b) are connected through the wire penetration hole (115) in a form that surrounds the pier column (30) on the outside of the fastening portion (140), thereby connecting the entire inner frame module, and even if the pier column work platform falls, separation between the inner frames (111) is prevented.

An extension arm (150) is provided on a handle portion (120) on one side of an outer frame (113) to form an unbalanced moment when the pier column work platform falls, thereby causing wall friction on the inner frame (113) on the other side. When the extension arm (150) rotates to one side due to the unbalanced moment when the pier column work platform falls, the extension arm (150) can rotate radially from the center of the pier column (30) when viewed in plan.

The expansion arm (150) causes an asymmetrical load on the pier column work platform when the pier column work platform falls, and when the pier column work platform tilts or rotates to one side due to the resulting unbalanced moment, it rotates radially from the center of the pier column (30) to generate a larger unbalanced moment, thereby preventing the pier column work platform from falling due to greater friction on the inner frame (113) on the other side. In this process, the wire (130) prevents separation between the inner frames (111) even if the pier column work platform falls, so that the pier column work platform itself can be prevented from falling even if it tilts.

The extension arm (150) includes a hinge portion (155) provided at the upper end of the handle portion (120), a main body portion (151) extended to correspond to the height of the handle portion (120) through the hinge portion (155), and a weight (153) provided at the end of the main body portion (151).

The weight (153) provided on one side of the pier column work platform can be provided with a preset weight to prevent weight imbalance with the worker on the opposite side, and even if the pier column work platform inevitably falls, the size of the unbalanced moment can be further increased as the expansion arm (150) rotates and expands around the hinge part (155), so that the frictional force of the inner frame (113) on the other side increases further when falling, thereby stopping the fall of the pier column work platform.

Referring to FIGS. 2A to 2C, a method for constructing a pier using a pier workbench equipped with a fail-safe function according to an embodiment of the present invention is described.

A method for constructing a pier using a pier work platform equipped with a fail-safe function according to an embodiment of the present invention includes a first construction step of setting a retaining form (30') on top of a pier foundation (50) and connecting it to the pier foundation (50) and installing a working tower (60) to a preset height.

The pier column foundation (50) is formed on the ground where the pier column (30) will be installed to support the pier column (30), and column reinforcement may be provided inside. The column reinforcement is a reinforcement provided inside the pier column (30) to support the bending tensile force generated in the pier column (30) and is formed to be composite with the concrete to be poured.

The retaining formwork (30') is formed as a part of the pier column (30) without being dismantled and functions as a formwork itself when constructing the pier column (30), and is formed in the shape of a hollow cylinder. The retaining formwork (30') is prepared as a precast thin plate and can be formed as a module of unit height.

Afterwards, a second construction stage is prepared to prepare a first pier column work platform (80') adjacent to the walking tower (60). The pier column work platform can be prepared as a pier column work platform equipped with the aforementioned fail-safe function.

Next, a third construction stage can be prepared in which another retaining formwork (30') is installed on top of the retaining formwork (30') and connected to each other.

The third construction stage is to apply concrete adhesive in advance to the parts to be connected by lamination and then to add compressive force at a preset pressure to connect the upper and lower formwork (30).

The third construction stage can be accomplished solely by applying concrete adhesive in advance and then applying a compressive force at a preset pressure, but preferably, the connection can be accomplished in parallel with the mechanical joint of screw-processed ironwork embedded in advance at the ends of the upper and lower formwork (30).

Next, a fourth construction stage can be prepared in which the walking tower (60) is formed higher and a second pier column work platform (80) is installed in two stages on top of the formwork (30) provided at the top.

In the first construction stage or the third construction stage, a stage of pouring concrete into the interior of the formwork (30) after setting the formwork (30) may be provided.

The above description of the present invention is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential characteristics of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single component may be implemented in a distributed manner, and likewise, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

110: Body
120: Handle
130: Wire
140: Fastening
150: Extension arm

Claims (10)

In a pier column formed through a formwork, a pier column work bench provided to wrap around the perimeter of the pier column according to the shape of the pier column,
The above-mentioned pier work bench comprises an inner frame provided adjacent to the pier, an outer frame connected to the inner frame through a support, and a handle portion at an end of the outer frame.
The above inner frame is fastened by a fastening member including a bolt or buckle,
A pier column work bench equipped with a fail-safe function, characterized in that an extension arm is provided on one side of the outer frame to form an unbalanced moment when the pier column work bench falls, thereby causing wall friction on the inner frame on the other side. In the first paragraph,
A bridge pier workbench with a fail-safe function, characterized in that a wire penetrates the center of the inner frame and is spaced apart from the center of the inner frame, and the wire forms a concentric circle with the bridge pier. In the second paragraph,
A fail-safe pier workbench characterized in that the wire is provided on the outside of the fastening portion and a wire penetration hole is provided at the end of the inner frame adjacent to the inner frame. delete In the first paragraph,
The above extension arm is,
A hinge portion provided at the upper part of the handle portion;
A main body portion extended to correspond to the height of the handle portion through the hinge portion; and
A bridge pier work platform having a fail-safe function, characterized by including a weight provided at an end of the main body. In the first paragraph,
A pier work platform with a fail-safe function, characterized in that when the above-mentioned expansion arm rotates due to an unbalanced moment while the above-mentioned pier work platform is dropped, the above-mentioned expansion arm rotates radially from the center of the pier work platform when viewed in a plan view. In Article 6,
A pier work platform equipped with a fail-safe function, characterized in that when the above-mentioned expansion arm rotates due to an unbalanced moment when the pier work platform falls, it rotates radially from the center of the pier work platform, generating a greater unbalanced moment, thereby preventing the pier work platform from falling due to greater friction. In the first paragraph,
A pier work bench equipped with a fail-safe function, characterized in that the pier work benches are provided in multiple units spaced apart by a preset height according to the height of the pier. In a method for constructing a pier using a pier workbench equipped with a fail-safe function according to any one of Articles 1 to 3 and Articles 5 to 8,
The first construction stage is to set up a formwork on top of a pier foundation, connect it to the pier foundation, and build a walking tower to a preset height;
A second construction stage to prepare a first pier column work platform adjacent to the above-mentioned walking tower;
The third construction stage of installing a retaining form on the upper part of the above retaining form and connecting it to the retaining form on the lower part; and
A method for constructing a pier using a pier work platform equipped with a fail-safe function, including a fourth construction step of forming the above-mentioned walking tower high and installing a second pier work platform in two stages on top of the formwork provided at the top. In Article 9,
In the first construction stage or the third construction stage, a stage is provided for pouring concrete inside the formwork after setting the formwork.
A method for constructing a pier column using a pier column workbench equipped with a fail-safe function, characterized in that the pre-connected pier formwork and the adjacent pier formwork are connected by concrete adhesive and a preset pressure.

Images