KR19980083704A - Temporary device of mobile scaffolding - Google Patents

Abstract

The mobile scaffolding method provides a temporary scaffolding device that enables the construction of bridges irrespective of the change in the cross section of the bridge, which is the obstacle of construction.

The construction apparatus as described above used in a mobile scaffolding method for constructing a bridge superstructure is a hydraulic cylinder used to horizontally move the scaffold horizontally so that the scaffold is not caught on the pier head during forward movement, and each ratio A hydraulic jack is disposed above the lineage and used to adjust the road slope during concrete pouring. This not only improves the safety of the bridge according to the change of bridge shape, but also makes it possible to easily adjust the road slope, to ensure the quality and safety management of bridge construction work, and to shorten the air by simple continuous construction. Can be.

Description

Temporary device of mobile scaffolding

Conventionally, the bridge construction method has been commonly used the copper barging method (FSM method), but there is a limit in reducing the construction cost and shorten the air, the method described above by applying the Manesmann type MSS method (mobile scaffolding method) to improve this Although construction cost and air have been improved several times compared to the construction method, the construction method has limitations in construction by forming the head head shape of the piers in a circular or rectangular shape.

In addition, the scaffold moving device of Korean Patent Application No. 94-7055 discloses a scaffolding method that does not require a separate device and manpower for separating and reinstalling a bridge bracket from a bridge by allowing the bridge bracket to move along the scaffold. In addition, the method of moving the scaffold of Korean Patent Application No. 94-9150 discloses a scaffolding method that can be performed without difficulty even when the pier is high or the bad condition is applied by applying the same method as in the patent application.

However, in the above patents, a change in the cross section which is a construction obstacle in the mobile scaffolding method, that is, a construction disadvantage in which the bridge hypothesis cannot be executed irrespective of the shape of the head pier head.

The present invention improves the above limitations by moving the main box girders and the moving formwork vertically, horizontally, and vertically while allowing bridge construction regardless of the shape of the bridge, thereby improving the disadvantages of the above-described methods, reducing construction costs, air The present invention seeks to provide a temporary scaffolding apparatus capable of shortening and improving workability.

In order to achieve the above object, in the present invention, the hydraulic jack is installed on the pier support and used to move the scaffold, the hydraulic cylinder is installed in the scaffold used to move the scaffold forward, in the central crossbeam Installed in a mobile scaffolding method for constructing a bridge superstructure, including a hydraulic cylinder used to move the center crossbeam outwards when dismantling the formwork, and a hydraulic cylinder used to move inwards when dismantling the inner formwork. The provision apparatus provides a construction apparatus of a mobile scaffolding method comprising a hydraulic cylinder used to move the scaffold horizontally horizontally so as not to be caught by the pier head head during forward movement.

In addition, the temporary scaffolding apparatus of the mobile scaffolding method of the present invention further includes a hydraulic jack disposed above each scaffold and used to adjust the road slope during concrete pouring.

1 is a cross-sectional view of a temporary construction device showing a pier constructed by a conventional mobile scaffolding method;

2 is a cross-sectional view of a temporary construction device showing a pier being constructed by a mobile scaffolding method according to the present invention;

Figure 3 is a detailed cross-sectional view of the hydraulic jack used to horizontally move the scaffolding of the construction apparatus of the present invention in the transverse direction; And

Figure 4 is a perspective view showing in detail the scaffold that is horizontally moved horizontally to move forward by the operation of the temporary device of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration and operation of the present invention.

As described above, the mobile scaffolding method is a method of constructing a bridge by one span by using a special mobile scaffold having a formwork attached to the upper structure of the bridge.

first ; Lower bracket part used as a support for piers,

second ; The main box portion corresponding to scaffolding, and

third ; It is divided into form work and the like.

1 is a cross-sectional view of a temporary scaffolding apparatus of a mobile scaffolding method showing a bridge constructed by a conventional mobile scaffolding method, and FIG. 2 is a cross-sectional view of a temporary apparatus used in the improved mobile scaffolding method of the present invention.

In the present invention, a temporary scaffolding apparatus shown in FIG. 2 includes two scaffolds 5 and 5, a cross beam 4 on the scaffold 5, inner and outer dies 2 and 3, and a rear support cross beam ( It includes 1).

The Pier Bracket portion is designed to support the weight of the scaffolds 5 and 5 and the main box upper fixture and the weight of the concrete to be constructed. Four hydraulic jacks 6 are provided at the upper portions of the pier support 11 to move the scaffolds 5 and 5 up and down by up to 30 cm, and two transverse hydraulic cylinders 7 are installed. The lineages 5 and 5 can be moved in the horizontal direction (see FIG. 3).

The construction apparatus of the improved mobile scaffolding method according to the present invention includes a horizontal movement amount of the scaffolds 5 and 5 in the lateral direction so that the temporary scaffolds are not caught on the piers head during the lamination of the scaffolds 5 and 5. Arm length of the pier support (11) was increased to 6.5m to enlarge, reinforce the transverse hydraulic cylinder (7) to 50 ton class, the horizontal movement amount of each scaffold (5, 5) in the transverse direction up to 4.7 m increased to around 4.5m longer than existing mobile scaffolding installations.

As described above, the main box portion including the scaffolds 5 and 5 is integrally formed with a truss and a box structure, and the upper horizontal beam 4 and the inner and outer formwork 2 and 3 are formed. It supports and moves forward and has the function of adjusting the position and section of the concrete upper structure to be constructed on top of the construction apparatus as described below.

The forward movement of the scaffolds 5 and 5 is performed by drawing a wire to a grip hydraulic cylinder 10 installed in the scaffold, and a sliding pad is disposed between the bottom of the scaffold and the hydraulic jack 6 during the movement. Minimize the friction generated by the installation. A truss girder is installed at both ends which is 18 cm higher than the main box to reduce the cantilever moment during the forward movement. In the upper part of each scaffold (5, 5), 15 sets (two sets of two) hydraulic jacks (9) are installed to adjust the lower cross section during span concrete placing.

In the present invention, a new hydraulic jack was reinforced and installed in a 5 ton class in preparation for the cantilever moment generated during assembly and disassembly of the upper crossbeam 4 and the formwork 2 and 3.

The formwork part comprises a central crossbeam 4 on top of the scaffolds 5, 5 and an inner and outer formwork 2, 3 and a rear support crossbeam 1. The central cross beam 4 is formed integrally with the external formwork 3, and can be separated from the center when dismantling the form after pouring concrete, and the outside is provided by a 5 ton hydraulic cylinder 8 installed in the central cross beam 4. Can be pushed more than 1m. Thus, by installing the transverse hydraulic cylinder (8), the horizontal and horizontal hydraulic cylinder (7) installed on the pier support (11) can be easily carried out to assemble and dismantle the inner and outer molds (2, 3). By reinforcing the horizontal movement of the) can minimize the arm length of the pier support 11 can reduce the transverse moment.

The interior and exterior formwork (2, 3) functions as a mold during the pouring of the span concrete, and the assembly and disassembly of the formwork is carried out using a manpower and tension rope. In the movement of the inner formwork (2) is mounted on the rail and moved to the manpower and the outer formwork (3) is moved forward with the scaffolds (5, 5).

Hereinafter, the forward movement of the scaffolds 5 and 5 will be described in detail.

The forward movement of the scaffolds (5, 5) consists of the pier support (11) part, the scaffold (5, 5) and the main box part and formwork, the upper span concrete placing and the pre-stress tensioning and organic connection. This work movement proceeds in the following order.

First, a pair of rear brackets are dismantled and moved in the forward moving direction to install a new pier support 11. Next, it is connected to the rear support crossbeam 1, which dismantles the support suspension (Rear Suspension). After dismantling the center linkage of the crossbeam 4 and dismantling the outer formwork 3 (moving outward 10 cm), the scaffolds 5 and 5 are moved downward by 10 cm using the hydraulic jack 6. The inner formwork 2 is then dismantled (moved 50 cm inward) and mounted on a moving rail. The hydraulic beam 8 is used to move the crossbeam 4 and the outer formwork 3 horizontally outward. Next, the hydraulic cylinder 7 is horizontally moved outward by 4.5 m or more so that the formwork and the main box portion can pass through the piers (see FIG. 4). Sliding pads are installed below the scaffolds 5 and 5, and the scaffolds 5 and 5 and the formwork are moved forward by one hydraulic cylinder 10. Hydraulic cylinders 7 and 8 are used to move the scaffold and external formwork in place inwards for upper span concrete casting. Positioning of the external formwork 3 and the cross beam 4 and level adjustment of the lower end surface of the formwork using the hydraulic jack 9 are performed. After assembling the bottom reinforcement and installing the duct anchorage, the internal formwork 2 is dismantled and moved inwards by using the hydraulic form cylinder 12 for internal formwork, and then moved forward by manpower on the rail to assemble in place. Next, the upper and side reinforcing bars are assembled, and after the insertion of the P. S steel wire, the final level of the concrete placing section of the temporary scaffolding device is adjusted. After pouring concrete, steam is cured at a temperature of 110 ℃ -120 ℃. After steam curing, pre-stress tensioning is performed. The construction days of the one-span operation as described above take about 30 days.

As described above, according to the apparatus for constructing a mobile scaffold according to the present invention, it is possible to construct a bridge irrespective of the change in the cross section of the bridge, which is a construction obstacle in the conventional mobile scaffolding, that is, the shape of the pier head.

Therefore, not only can the lane increase effect according to the change of the pier shape, but also the road slope adjustment can be easily performed, and thus the quality and safety management of the bridge construction work can be secured. The longer and higher the length, the more economical it can be constructed regardless of the ground conditions such as mountains, valleys, and water, providing the effect of improving productivity and constructability together.

Those skilled in the art will appreciate that various modifications may be made without departing from the spirit and advantages of the invention. Accordingly, the scope of the appended claims should not be limited to what is specified in this specification, and all features noted in these claims should be construed broadly to encompass their corresponding equivalents.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary scaffolding system of a movable scaffolding system. More specifically, a temporary apparatus used to construct a bridge upper structure by pouring an upper concrete while moving a main box girder and a formwork. It relates to a scaffold horizontal moving hydraulic jack and road slope adjustment hydraulic jack.

Claims (2)

Hydraulic jack (6) is installed on the top of the pier support (11) and used to move the scaffolds (5, 5), A hydraulic cylinder 10 installed in the scaffolds 5 and 5 and used to move the scaffolds 5 and 5 forward, Hydraulic cylinder (8) installed in the center crossbeam (4) is used to push the center crossbeam (4) outward when disassembling the form (2, 3), In the temporary device used in the mobile scaffolding method for constructing a bridge superstructure, comprising a hydraulic cylinder (12) used to move inwards when dismantling the inner formwork (2), And a hydraulic cylinder (7) used to move the scaffold (5, 5) horizontally in a horizontal direction so that the temporary head is not caught in the pier head during forward movement. The temporary scaffolding apparatus of claim 1, further comprising a hydraulic jack (9) disposed above each scaffold (5, 5) and used to adjust the road slope during concrete pouring.