WO2014193020A1

WO2014193020A1 - Incremental launching method for concrete bridge using transport carts and winch

Info

Publication number: WO2014193020A1
Application number: PCT/KR2013/005160
Authority: WO
Inventors: 김태희
Original assignee: Kim Tae Hee
Priority date: 2013-05-30
Filing date: 2013-06-12
Publication date: 2014-12-04
Also published as: KR101492914B1; KR20140140728A

Abstract

The present invention relates to an incremental launching method for a concrete bridge, for constructing concrete girders constituting the bridge. The incremental launching method for the concrete bridge using transport carts and a winch, according to the present invention, is a method for installing the concrete girders between bridge supports, which are installed in a line with a specific distance therebetween, comprising the steps of: (a) arranging a plurality of the transport carts so as to be connected in a line, and on an upper panel preinstalled behind a bridge support on one side; (b) positioning the concrete girder on top of the transport carts; (c) installing and fixing the winch on top of a front bridge support on the other side where the concrete girder will be installed upon arrival, and advancing the concrete girder toward the bridge support on the other side by connecting a pulling wire of the winch to the frontmost transport cart and pulling the transport carts forward; and (d) releasing the pulling wire after advancing the concrete girder to the position of a bridge bearing of the bridge support on the other side, and then placing the concrete girder on top of the bridge bearing of the bridge support on the one side and the bridge bearing of the bridge support on the other side.

Description

Concrete Bridge Traction Extrusion Using Bogie and Hoist

The present invention relates to a concrete bridge traction extrusion method for constructing a concrete girder of a bridge, more specifically, it is possible to shorten the air and reduce costs in the traction extrusion of the concrete girder of the bridge, and to stick to the forward distance of the concrete girder It is about the concrete bridge traction extrusion method using the bogie and the hoist which can be installed without receiving and can prevent the damage of the concrete girder.

A bridge is a generic term for structures placed on them when crossing over roads, railways, valleys, lakes, shores, or other roads, railways, waterways, houses, towns, etc. One of the construction methods for constructing an extrusion method (incremental launching method, ILM) is.

The bridge extrusion method has a push type (push type), a lift and push type (pulling-out type) according to the extrusion method, the present invention is a double pulling type (pulling-out type) It is related to.

In the bridge extrusion method, the concrete girder 20 is manufactured one by one at a mold fabrication site installed at the rear of the bridge or the first pier, and then using the tow jack 4 installed at the upper part of the bridge. As a construction method to construct a bridge while pushing a little bit (Fig. 1), it is widely used due to the advantages of excellent concrete quality control, economical and can be constructed regardless of the bridge under conditions. And the related technology can be found in Patent No. 10-0093125 (traction extruder of the bridge top plate), Patent No. 10-0103702 (bridge upper hole extrusion method using a bogie).

However, the conventional bridge extrusion method is expensive because the equipment for the extrusion of the concrete girder constituting the bridge is very expensive and it is not economical when the total extension of the bridge is about 500m or less, and it cannot be used when the span is more than 50m. There was.

In addition, when the concrete girder is extruded from the front or the rear of the concrete girder, there is a limit in the forward distance due to the limitation of the hydraulic jack pitch, there was a disadvantage in that a lot of work time due to the repeated forward and backward operations of the hydraulic jack.

In addition, in the conventional traction extrusion method of towing the concrete girder in the bridge extrusion method in front of the concrete girder or launching nose (pulling nose) directly pull the concrete girder can cause a tensile force to damage the concrete girder itself vulnerable to tensile force there was.

In order to solve the above problems, the present invention can reduce the construction cost by using a cheap and easy to acquire equipment, in particular, concrete bridge traction extrusion method using a bogie and winch effective for reducing the cost of small and medium-sized bridge To provide.

In addition, the present invention in the traction extrusion of the concrete girder constituting the bridge, it is possible to omit the forward and backward repetitive work of the hydraulic jack can shorten the air, and can be efficiently constructed regardless of the forward distance of the concrete girder and To provide a concrete bridge traction extrusion method using a winch.

In addition, the present invention is to provide a concrete bridge traction extrusion method using a bogie and a hoist that can prevent the concrete girder or damage to the concrete girder due to the tensile force by not pulling the concrete girder or the propulsion nose directly in the traction extrusion method of the bridge.

According to a preferred embodiment of the present invention to solve the above problems, the present invention provides a method for installing concrete girders between the piers installed in a line spaced apart from each other, (a) a plurality of pre-installed top plate at the rear of one piers Arranging the balances so that they are connected in line with each other; (b) placing a concrete girder on top of the bogie; (c) advancing the concrete girder to the other pier side by installing and fixing the winch on the upper side of the pier where the concrete girder is reached and installed, and connecting the towing wire of the winch to the fore bogie to pull the bogie forward; And (d) advancing the concrete girder to the other pier bridge position, releasing the traction wire, and placing the concrete girder on one pier bridge and the other pier bridge. It provides a concrete bridge traction extrusion method using a bogie and a hoist.

According to another preferred embodiment of the present invention, in order to reduce the parent moment acting on the concrete girder extruded in the step (b), a propulsion nose is installed at the end of the concrete girder forward side, and the propulsion nose is in the step (d) It provides a concrete bridge traction extrusion method using a bogie and a winch, characterized in that the concrete girder is removed after being positioned on the upper side of the bridge piers and the other bridge piers.

According to another preferred embodiment of the present invention is provided between the one side pier and the other pier is provided with a temporary support installed on the water-lifting pants or installed on the ground above the ground to support the bottom of the concrete girder while advancing the concrete girder It provides a concrete bridge traction extrusion method using a bogie and a hoist.

According to another preferred embodiment of the present invention, in the step (d), the bridge is provided with a hydraulic jack to move up and down, to move the concrete girder located between one pier and the other pier downwards to the hydraulic jack to be placed on the shoe installed on the bridge It provides a concrete bridge traction extrusion method using a bogie and a hoist.

According to another preferred embodiment of the present invention, in the step (b), the precast concrete girder is placed on the bogie or by installing a formwork on the bogie's upper surface, the concrete using the bogie and the hoist Provide bridge traction extrusion method.

According to another preferred embodiment of the present invention, in the step (c), if the fore trolley reaches one pier, the fore bogie is removed and the concrete girder is advanced by repeating the process of advancing the concrete girder by connecting the towing wire to the next bogie. It provides a concrete bridge traction extrusion method using a bogie and a hoist.

According to the present invention as described above has the following effects.

First, it is possible to reduce the cost by using cheap and easy-to-acquire equipment in the traction extrusion construction of the concrete girder constituting the bridge, especially effective for reducing the cost of small and medium-sized bridges.

Second, because the girder is towed by a winch fixed to the other piers in front, it is possible to omit the repetitive forward and backward operations using the hydraulic jack, it is possible to shorten the air, and can be installed regardless of the forward distance of the concrete girder.

Third, in the traction extrusion method of the bridge to pull the bogie with the concrete girders located on the top without directly pulling the concrete girder or propulsion nose, it is possible to prevent the damage of the concrete girder due to the tensile force acting on the concrete girder.

Fourth, since the end of the propulsion nose is supported after advancing the concrete girder by a certain amount using the propulsion nose, each concrete girder is switched from the cantilever beam to the support beam at both ends. Therefore, it is possible to economically design with optimized girder section by minimizing the influence of the parent moment acting on the concrete girder.

Fifth, it is possible to construct bridges stably and efficiently by installing temporary supports between adjacent piers. That is, when the concrete girders are placed on the upper surface of the temporary support during the extrusion process, the concrete girders can be switched from the cantilever beams to the both ends of the support beams, thereby minimizing or not acting on the parent girders in the concrete girders, thereby enabling the design and construction of economic and efficient sections Do.

1 is a view showing an extrusion method of a conventional concrete bridge.

2 to 9 are views showing a part of the step-by-step process of the concrete bridge traction extrusion method using the trolley and the hoist of the present invention, respectively.

FIG. 2 is a diagram illustrating a step of arranging the carts interconnected to the installed upper plate and placing the concrete girder on the upper part of the cart.

3 is a view illustrating a state in which a propulsion nose is installed at an end of a concrete girder forward side.

4 is a view illustrating a state in which self-elevating pants and temporary supports are installed between adjacent piers.

5 is a view showing a step of connecting the towing wire of the hoisting machine to the foremost bogie and towing the bogie to the hoisting machine.

6 is a view showing a step in which the propulsion nose is positioned above the other pier by pulling the bogie with a winch.

7 is a view showing the step of advancing the concrete girder to the other pier bridge position.

8 is a view illustrating a state in which the concrete girder is moved downward by the hydraulic jack.

9 is a view showing a state in which the installation of the bridge is completed by placing the concrete girder on the shoe upper portion.

Concrete bridge traction extrusion method using the bogie and winch of the present invention is a method for installing concrete girders between the piers installed in a line so as to be spaced apart by a predetermined interval, (a) a plurality of bogies on the pre-installed top plate behind the one side piers Arranging to be connected in line with each other; (b) placing a concrete girder on top of the bogie; (c) advancing the concrete girder to the other pier side by installing and fixing the winch on the upper side of the pier where the concrete girder is reached and installed, and connecting the towing wire of the winch to the fore bogie to pull the bogie forward; And (d) advancing the concrete girder to the other pier bridge position, releasing the traction wire, and placing the concrete girder on one pier bridge and the other pier bridge. Characterized in that comprises a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

2 is a view showing the step of placing the trolley 40 on the top plate 30 is already installed and positioning the concrete girder 20 on the upper portion of the trolley 40, Figure 3 is a concrete girder 20 at the forward end end It is a figure which shows the state which the propulsion nose 60 was installed.

Concrete bridge traction extrusion method using the bogie and winch of the present invention relates to a method for installing the concrete girder 20 between the piers 10 installed in a row so as to be spaced apart from each other at regular intervals.

Therefore, the construction of the piers 10 should be completed before the implementation of each step constituting the present invention. Construction of the pier 10 proceeds in consideration of the ground conditions and the impact on the surrounding environment.

The present invention comprises the steps of: (a) arranging a plurality of trucks (40) in line with each other in a pre-installed top plate 30 behind one side piers (10a); (b) placing a concrete girder 20 on top of the trolley 40; (c) The winch 50 is installed and fixed on the upper side of the other piers 10b in front of the concrete girder 20 to be installed, and the towing wire 51 of the winch 50 is connected to the fore bogie 40a. Advancing the concrete girder 20 to the other pier 10b side by pulling the cart 40 forward; And (d) advancing the concrete girder 20 to the position of the other pier bridge 11b, releasing the traction wire 51, and placing the concrete girder 20 at the one bridge bridge 11a and the other bridge bridge 11b. Resting on top; Characterized in that comprises a.

As can be seen in Figure 2, the present invention (a) a plurality of trucks (40) arranged on the pre-installed top plate (30) behind one side piers (10a) to be connected to each other in line, (b) the truck 40 proceeds in the order of placing the concrete girder 20 on the top.

In the step (a), a plurality of bogies 40 are arranged so as to be connected in a row, the bogies 40 are arranged in parallel so as to have a plurality of rows, and the concrete girders 20 are positioned on the top of each bogie 40. , Installing a plurality of concrete girders 20 may be performed simultaneously or sequentially.

Concrete girder 20 in the present invention refers to the concrete girder 20 which is located on the upper surface of the pier 10 to form a bridge.

In the step (b), the concrete girder 20 may be constructed as a cast-in-place concrete girder 20 by placing the precast concrete girder 20 on the trolley 40 or by installing a formwork on the upper surface of the trolley 40. have.

That is, the concrete girder 20 may be made in advance in the pre-fabrication girder to be placed on the trolley 40 with a heavy lifting. However, when the size of the concrete girder 20 is difficult to transport and lift, it may be installed by placing the formwork on the upper portion of the bogie 40 by site pouring.

The concrete girder 20 can be a variety of cross-sectional shape, it may be configured as a concrete box girder, such as square or formulation cross section.

As can be seen in Figure 3, the propulsion nose 60 to the forward side end of the concrete girder 20 to reduce the parent moment acting on the concrete girder 20 is extruded in the step (b). Can be installed.

The propulsion nose 60 is installed at the forward end of the concrete girder 20, after the concrete girder 20 is advanced a certain amount, the end of the propulsion nose 60 is the other pier 10b or temporary support 80 It is supported on the upper surface to convert the concrete girder 20 from the cantilever beam to both ends of the support beam. Therefore, by minimizing the influence of the parent moment and deflection acting on the concrete girder 20, in the traction process of the concrete girder 20 improves the structural safety and construction stability.

The propulsion nose 60 is preferably made of light steel truss skeleton.

4 is a view showing the self-elevating pants 70 and the temporary support 80 is installed between the adjacent piers 10, Figure 5 is a forklift wire (50) of the winch 50 in the front trolley (40a) 51 is a view showing the step of connecting the cart 40 to the winch 50, Figure 6 is towing the cart 40 to the winch 50, the propelled nose (60b) to the top of the other side piers (10b) Is a diagram showing a step in which) is located.

When the bridge is installed in the water section, the present invention as shown in Figure 4, the self-elevating pants 70 is installed between the one side piers (10a) and the other piers (10b) in the water, The temporary support 80 is installed on the liftable pants 70 to support the lower portion of the concrete girder 20 while the concrete girder 20 moves forward.

The self-elevating pants (SEP pants: 70) is provided with a support at the corner, there is an advantage that the upper construction is not affected by tidal flow or waves because there is little up and down flow. The prop of the self-elevating pants 70 is height adjustable according to the depth.

The self-elevating pants 70 is preferably fixed to the portion that becomes the center of the adjacent piers 10.

The self-elevating pants 70 and the temporary support 80 are temporary structures that are used while a part of the concrete girder 20 is mounted on the temporary support 80 for a period of time during the towing of the concrete girder 20.

When the bridge is installed in the land section, the temporary support 80 is installed on the ground above the land.

In the present invention, by using the temporary support 80, the concrete girder 20 in the extrusion process of the concrete girder 20 is located on the upper surface of the temporary support (80). Therefore, the concrete girder 20 is converted from the cantilever beam to both ends of the support beam in the construction process, it is possible to minimize or not act as a parent to the concrete girder 20. And because the use of self-elevating pants with a low vertical flow, minimizing the generation of additional moments in the concrete girder 20 due to the fluctuation of the water level or the vertical flow due to the wave.

The roller is installed on the upper surface of the temporary support 80 for the effective movement of the concrete girder 20.

On the other hand, after the step (b) is completed, as shown in Figures 5 to 6, (c) the concrete girders 20 is fixed to install the winch 50 on the top of the other side piers (10b) to be installed , By connecting the towing wire 51 of the winch 50 to the front trolley 40a and pulling the trolley 40 forward to advance the concrete girder 20 to the side of the other piers 10b.

In the step (c), the winch 50 is configured to pull the concrete girder 20, is fixedly installed on the other side piers (10b).

Instead of using expensive and complicated extrusion equipment, the present invention uses the low cost and easy to obtain winch 50 to traction extrusion the concrete girders 20. Therefore, it is efficient in terms of air and construction cost even for small and medium bridges.

In the step (c), when the front trolley 40a reaches one side of the piers 10a, the front trolley 40a is removed and the towing wire 51 is connected to the next trolley 40b to advance the concrete girder 20. The process may be repeated to advance the concrete girder 20.

And as shown in FIG. 6, when the concrete girder 20 or the propelling nose 60 is positioned above the other pier 10b by towing the bogie 40 to the winch 50, the propulsion nose 60 is gradually dismantled. Alternatively, the winch 50 may be repositioned above the other pier adjacent to the other pier 10b.

7 is a view showing a step of advancing the concrete girder 20 to the position of the other pier bridge (11b), Figure 8 is a view showing a state of moving the concrete girder 20 downward with the hydraulic jack 90, 9 is a view showing the concrete girder 20 is placed on the shoe 12, the installation of the bridge is completed.

In the present invention, after the step (c), (d) advances the concrete girder 20 to the other pier bridge (11b) position, and then release the towing wire 51, concrete girder 20 one side pier bridge It is settled on the upper part of 11a and the other bridge bridge 11b.

At this time, in the step (d) as shown in Figure 7 the bridge 11 is provided with a hydraulic jack 90 that can be moved up and down, as shown in Figure 8 concrete girder located between one pier 10a and the other pier 10b 20 can be moved downward to the hydraulic jack 90, can be placed in the upper portion of the shoe 12 provided in the bridge 11 as shown in FIG.

Of course, when the propulsion nose 60 is installed at the forward side of the concrete girder 20 in the step (b), as shown in FIG. 7, the concrete girder 20 has one side pier bridge in the step (d). Remove the next propulsion nose (60a) located on the top (11a) and the other bridge piers (11b).

That is, the towing process of the concrete girder 20 is completed, the concrete girder 20 may be positioned above the hydraulic jack 90, and the hydraulic jack 90 may be raised to support the lower portion of the concrete girder 20 in advance. When the hydraulic jack 90 supports the load of the concrete girder 20, the propulsion nose 60 is removed.

In addition, as shown in Figure 4, when the self-elevating pants 70 and the temporary support 80 is installed between the one side piers (10a) and the other side piers (10b) these temporary members in step (d) You will need to remove the configuration.

Concrete bridge traction extrusion method using the bogie and winch of the present invention is for the concrete bridge traction extrusion method for the construction of the concrete girder of the bridge has industrial applicability.

Claims

In the method for installing the concrete girder 20 between the piers 10 installed in a line spaced apart from each other by a certain interval,

(a) arranging the plurality of trucks 40 to be connected to each other in a line in the pre-installed upper plate 30 behind the one side piers 10a;

(b) placing a concrete girder 20 on top of the trolley 40;

(c) The winch 50 is installed and fixed on the upper side of the other piers 10b in front of the concrete girder 20 to be installed, and the towing wire 51 of the winch 50 is connected to the fore bogie 40a. Advancing the concrete girder 20 to the other pier 10b side by pulling the cart 40 forward; And

(d) After advancing the concrete girder 20 to the position of the other pier bridge 11b, the traction wire 51 is released, and the concrete girder 20 is connected to the one bridge bridge 11a and the other bridge bridge 11b. Placing it on top; Concrete bridge traction extrusion method using a trolley and hoisting machine comprising a.
The method of claim 1,

In order to reduce the parent moment acting on the concrete girder 20, which is extruded in the step (b), the propulsion nose 60 is installed at the forward end of the concrete girder 20,

The propulsion nose 60 is a concrete bridge using a bogie and a hoist, characterized in that the concrete girder 20 is removed after the concrete girder 20 is positioned on one side of the bridge bridge (11a) and the other bridge bridge (11b) in the step (d). Traction extrusion method.
The method of claim 1,

Between the one pier (10a) and the other pier (10b) is provided with a temporary support (80) installed on the self-lifting pants 70 installed on the water surface or the upper surface of the land while the concrete girder 20 is moving forward Concrete bridge traction extrusion method using a trolley and a hoist, characterized in that for supporting the bottom of the concrete girder (20).
The method of claim 1,

In the step (d), the bridge 11 is provided with a hydraulic jack 90 to move up and down, to move the concrete girder 20 located between the one piers (10a) and the other piers (10b) downwards to the hydraulic jack (90). Concrete bridge traction extrusion method using a trolley and hoisting machine, characterized in that it is placed in the upper portion of the shoe 12 installed on the bridge (11).
The method of claim 1,

In the step (b), the precast concrete girder 20 is placed on the trolley 40 or by installing a formwork on the upper surface of the trolley 40, the bogie and hoisting machine, characterized in that the construction of the site cast concrete girder 20 Concrete bridge traction extrusion method
The method of claim 1,

In the step (c), when the front trolley 40a reaches the one side piers 10a, the front trolley 40a is removed and the towing wire 51 is connected to the next trolley 40b to advance the concrete girder 20. Concrete bridge traction extrusion method using a bogie and hoist, characterized in that to advance the concrete girder 20 by repeating the process.