JP2022103586A - Formwork installation device and formwork installation method using thereof - Google Patents

Abstract

To provide a formwork installation device and a formwork installation method capable of efficiently positioning and installing a formwork for a tunnel at a predetermined height position efficiently and in a short time with a simple configuration.SOLUTION: A formwork installation device 1 includes an elevating lift 10, an electric chain block 20, a guide rail 30 (a traveling beam 30A and an overhanging traveling girder 30B), and a carry-in carriage 40. In a formwork installation method, a first step of mounting a ceiling formwork 2A on the carry-in carriage 40 on the elevating lift 10 at the lowest level, a second step of raising the elevating lift 10 to a predetermined height position, a third step of moving the carry-in carriage 40 from the elevating lift 10 to the guide rail 30 and moving the carry-in carriage 40 to a predetermined position of the tunnel 100, a fourth step of transferring the ceiling formwork 2A from the carry-in carriage 40 to the traveling beam 30A, a fifth step of returning the empty carry-in carriage 40 to the elevating lift 10, and a sixth step of lowering the elevating lift 10 together with the carry-in carriage 40 to the lowest position are repeated a plurality of times.SELECTED DRAWING: Figure 2

Description

There is an application for exception of loss of novelty

The present invention relates to a formwork installation device used in tunnel construction and a formwork installation method using the same.

For example, in a tunnel excavated by the NATM method (New Austrian Tunneling Method) and primary lining by spraying concrete on the inner surface, concrete is placed on the primary lining surface for secondary lining. Will be done. Here, the formwork for the tunnel is a steel member installed with a predetermined radial gap with respect to the primary lining surface of the tunnel, and is connected to the ceiling formwork and both sides of the ceiling formwork. It is divided into three parts with a side formwork.

By the way, as a formwork installation technique for a tunnel, for example, Patent Documents 1 to 4 have been proposed. First, the ceiling formwork is suspended by a wire hung on a support aggregate installed on the ceiling wall of the tunnel. Lower, lift this suspended ceiling formwork to a predetermined height position with a winch, electric chain block, etc., place this ceiling formwork on a pedestal and support it, and both sides of this ceiling formwork There are those that connect the side formwork to each other.

As another installation technology, a ceiling formwork is placed on a pedestal whose support legs are moved up and down by a hydraulic cylinder, the ceiling formwork is lifted together with the gantry, and additional legs are added to the lifted pedestal to add the ceiling formwork. Is positioned at a predetermined height, and side formwork is connected to both sides of the ceiling frame.

Japanese Patent No. 4023615 Japanese Patent No. 4023616 Japanese Patent No. 4023617 Japanese Patent No. 4290053

However, according to the conventional installation technique of formwork in tunnel construction, a high-weight (about 3 tons) ceiling formwork can be hung with a wire and lifted to a predetermined height position, or the ceiling formwork can be hung together with a pedestal. Since it is necessary to lift it to a height position, there is a problem that not only the device for that purpose becomes large-scale, but also a lot of labor and time are required for the installation work of the tunnel formwork including the positioning operation.

The present invention has been made in view of the above problems, and an object thereof is to efficiently position and install a tunnel formwork at a predetermined height position efficiently in a short time with a simple configuration. It is an object of the present invention to provide a formwork installation device that can be used, and a formwork installation method using the same.

In order to achieve the above object, the formwork installation device according to the present invention is a device for installing a formwork with a predetermined radial gap between the formwork and the inner surface of the tunnel, and is installed at both ends in the width direction of the tunnel. A pair of elevating lifts that move up and down along a pair of erect guide columns, a driving means that moves the elevating lift up and down, and a pair of tunnels arranged parallel to each other along the longitudinal direction at both ends in the width direction. The guide rail is provided with a pair of carry-in trolleys that support the formwork and can travel along the guide rail along the longitudinal direction of the tunnel.

Further, the formwork installation method according to the present invention is a method of installing the formwork at a predetermined position in the tunnel by using the formwork installation device, and the formwork is placed on the elevating lift at the lowest position. The first step of mounting the formwork on the carry-in cart, the second step of raising the elevating lift on which the formwork is placed to a predetermined height position by the drive means, and the formwork are mounted. The third step of moving the carry-in trolley from the lift to the guide rail and traveling the carry-in trolley along the guide rail to a predetermined position in the longitudinal direction of the tunnel, and the tunnel formwork from the carry-in trolley. The fourth step of transferring to the guide rail, the fifth step of moving the empty carry-in carriage along the guide rail and returning it to the elevating lift, and the elevating lift by the driving means. It is characterized in that a plurality of the formwork are sequentially installed along the longitudinal direction of the tunnel at a predetermined position in the tunnel by repeating the sixth step of lowering the formwork together with the carry-in trolley to the lowest position a plurality of times.

According to the formwork installation method using the formwork installation device according to the present invention, the elevating lift is raised together with the carry-in trolley and the formwork supported by the carry-in trolley in a state where the elevating lift is at the lowest position, and the carry-in trolley is raised. If the carry-in trolley is moved to a predetermined position in the longitudinal direction of the tunnel together with the formwork by transferring to the guide rail, and the formwork is transferred to the guide rail at that position, the formwork is positioned in the predetermined position. Will be installed. At this time, the positional relationship between the guide rail and the carry-in carriage is set in advance so that the formwork supported by the guide rail is installed at a predetermined height position.

Then, after moving the empty carry-in trolley to the elevating lift along the guide rail and returning it, the elevating lift is lowered to the lowest position, and thereafter, by repeating the above work multiple times, in the tunnel. A plurality of formwork can be sequentially installed at predetermined positions along the longitudinal direction of the tunnel.

Therefore, since it is not necessary to individually lift each tunnel formwork and individually position it at a predetermined height position, the formwork can be efficiently and quickly and accurately placed at a predetermined height position with a simple configuration. It can be positioned and installed.
The device of the present invention can be used when the ceiling formwork is carried out from the installation position to the ground even in the dismantling of the formwork installed in the tunnel and the secondary lining is completed.

It is a cross-sectional view of a tunnel in which a formwork is installed. It is a side view which shows the formwork installation apparatus which concerns on this invention, and the formwork installation method using this. It is a top view of the formwork installation apparatus which concerns on this invention. FIG. 2 is a view in the direction of arrow A in FIG. It is an enlarged detailed view of the main part of FIG. It is a B enlarged detailed view of FIG. FIG. 6 is a sectional view taken along line CC of FIG. It is a side view of an electric chain block. It is a side view of the carry-in trolley. FIG. 9 is a sectional view taken along line DD of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[Formwork installation device]
FIG. 1 is a cross-sectional view of a tunnel in which a formwork is installed, FIG. 2 is a side view showing a formwork installation device according to the present invention and a formwork installation method using the same, and FIG. 3 is a formwork installation according to the present invention. A plan view of the device, FIG. 4 is a view in the direction of arrow A in FIG. 2, and FIG. 5 is an enlarged detailed view of a main part of FIG. In the following description, the width direction in the tunnel is defined as the “left-right” direction as indicated by the arrows in FIGS. 3 and 4, and the tunnel axial direction is indicated by the arrows in FIGS. 2, 3 and 5. The direction is "front and back".

As shown in FIG. 1, the tunnel 100 excavated by the NATM method or the like and primary lining by spraying concrete on the inner surface is made of concrete on the primary lining surface 100a for secondary lining. Is placed. Here, the formwork 2 is a notched circular steel member installed with a predetermined radial gap δ on the primary lining surface 100a of the tunnel 100, and is an arc-shaped ceiling located at the upper center. It is divided into three parts, a formwork 2A and an arcuate side surface formwork 2B connected to both sides of the ceiling formwork 2A.

The formwork installation device 1 according to the present invention is a device for installing the ceiling formwork 2A of the formwork 2 at a predetermined position in the tunnel 100, and is erected at both ends in the width direction of the tunnel 100. An elevating lift 10 that moves up and down along a pair of guide columns 3, an electric chain block 20 as a driving means for moving the elevating lift 10 up and down, and both ends in the width direction of the tunnel 100 in the longitudinal direction (tunnel axial direction). A pair of guide rails 30 arranged parallel to each other along the same, a pair of carry-in trolleys 40 capable of traveling in the longitudinal direction of the tunnel 100 along the elevating lift 10 and the guide rails 30, and a pair of carry-in trolleys 40 installed on the carry-in trolleys 40, respectively. It is equipped with a hydraulic jack 50 which is a pair of stretchable support means.

As shown in FIG. 4, the pair of guide stanchions 3 are erected vertically and parallel to each other on a block-shaped foundation pedestal 4 installed at both left and right ends in the tunnel 100, and these guide stanchions 3 are erected. A horizontal cross member 5 is laid horizontally between the upper end portions of the above. The guide column 3 is made of H-shaped steel.

Further, as shown in FIGS. 2 and 3, a pair of left and right guide rails 30 are installed in the upper part of the tunnel 100 in parallel and horizontally from the upper end of the guide columns 3 toward the front. Here, each of the left and right guide rails 30 has a wide vertical width and a long length, and the existing traveling beam 30A and a short vertical width and a short length connected to the rear end of the traveling beam 30A in a straight line. It is composed of an overhanging traveling girder 30B. Both the traveling beam 30A and the overhanging traveling girder 30B are made of H-shaped steel.

A lift 10 is supported on the pair of left and right guide columns 3 so as to be able to move up and down. The elevating lift 10 is configured as a rectangular frame, and a pair of left and right support members 11 extend forward in parallel and horizontally from the lower portion thereof. Further, the elevating lift 10 is supported on the left and right sides of the elevating lift 10 by a pair of left and right guide columns 3 so as to be able to move up and down. Here, the support structure of the elevating lift 10 to the guide column 3 will be described with reference to FIGS. 6 and 7.

That is, FIG. 6 is an enlarged detailed view of B in FIG. 5, and FIG. 7 is a sectional view taken along line CC in FIG. 6. In these views, only the support structure of the upper member 12 of the elevating lift 10 to the guide column 3 is shown. Although shown, since the support structure of the lower member 13 (see FIGS. 4 and 5) of the elevating lift 10 is the same, the illustration and description thereof will be omitted.

Guide rollers 14 are rotatably supported on the left and right sides of the front end of the upper member 12 made of channel steel, and when the guide rollers 14 come into contact with the guide columns 3, the elevating lift 10 regulates the front-rear direction. It is possible to move up and down along the guide column 3 in this state.

Further, a bracket 16 is attached to a vertical member 1515 erected between the left and right ends of the upper member 12 and the lower member 13 of the elevating lift 10, and a guide roller 17 is rotatably supported on the bracket 16. Has been done. Then, when the guide roller 17 comes into contact with the guide column 3, the elevating lift 10 can be moved up and down by the guide column 3 in a state where the left-right direction is restricted.

The elevating lift 10 movably supported by the guide columns 3 by the above support structure is suspended by a pair of left and right electric chain blocks 20 which are drive means shown in FIGS. 1 to 5, and a pair of left and right guides. It can be moved up and down along the support column 3.

The electric chain block 20 is suspended by a cross member 5 erected between the upper ends of a pair of left and right guide columns 3 and a rectangular frame 6 installed on a pair of left and right overhanging traveling girders 30B. Specifically, the pair of left and right electric chain blocks 20 are suspended from the pair of left and right members 6A horizontally installed along the front-rear direction of the rectangular frame 6. Here, the configuration of each electric chain block 20 is shown in FIG.

That is, FIG. 8 is a side view of the electric chain block, and the illustrated electric chain block 20 includes a drive unit 21 and a control unit 22, and these drive units 21 and the control unit 22 are members of a rectangular frame 6. The brackets 23 and 24 fixed to 6A are suspended from the shafts 23a and 24a by hooks 25 and 26, respectively. Although not shown, the drive unit 21 contains an electric motor, a speed reducer, a pulley (block), etc., which are drive sources, and a chain 27 is wound around the pulley. A hook 28 is attached to the lower end of the chain 27, and the hook 28 is hung on the tip of a support member 11 extending horizontally from the lower part of the elevating lift 10 toward the front. Further, the control unit 22 fulfills a function of driving and controlling an electric motor (not shown) of the drive unit 21 by operating an operation switch 29 hanging from the drive unit 21.

In the present embodiment, the electric chain block 20 is used as the driving means for moving the elevating lift 10 up and down along the guide column 3, but other driving means such as a winch may be used.

By the way, as shown in FIGS. 2 to 5, a pair of left and right carry-in carts 40 are arranged so as to be able to travel on the pair of left and right upper members 12 extending horizontally and parallel to the elevating lift 10 in the front-rear direction. Here, the details of the configuration of each carry-in carriage 40 will be described below with reference to FIGS. 9 and 10.

That is, FIG. 9 is a side view of the carry-in carriage, FIG. 10 is a sectional view taken along line DD of FIG. 9, and each traveling carriage 40 is movably supported by a roller 41 that can rotate in the front-rear direction. The carry-in carriage 40 is a hand-push type that is pushed and traveled by an operator by hand, and is used in the front-rear direction along the upper member 12, the overhanging traveling girder 30B, and the traveling beam 30A of the elevating lift 10 as described later. Drive in the direction of the tunnel axis).

Further, on the left and right inside the front and rear rollers 41 in the front-rear direction of the carry-in trolley 40, a total of four vertical guide plates 42 for preventing the carry-in trolley 40 from falling off from the traveling beam 30A or the like are provided with a plurality of bolts 43. And nuts 44, respectively.

Further, hydraulic jacks 50, which are support means, are attached to two places inside the front and rear guide plates 42 in the front-rear direction of each carry-in carriage 40. Each hydraulic jack 50 includes a cylinder 51 and a rod 52 movably fitted in the cylinder 51, and the rod 52 is moved up and down by hydraulic pressure. A total of four hydraulic jacks 50, two each on the left and right carry-in carts 40, receive and support the ceiling formwork 2A, as will be described later.

As described above, the formwork installation device 1 according to the present invention includes a lift 10 that moves up and down along a pair of left and right guide columns 3, a pair of left and right electric chain blocks 20 that move the lift 10 up and down. A pair of left and right guide rails 30 (running beams 30A and overhanging running girders 30B) arranged parallel to each other along the longitudinal direction at both ends of the tunnel 100 in the width direction and a ceiling formwork 2A are supported by the guide rails 30. Since it is configured to include a pair of carry-in trolleys 40 that can travel in the front-rear direction along the line and a pair of expandable and contractible hydraulic jacks 50 installed on each carry-in trolley 40, the configuration does not become large. , Does not lead to a significant cost increase.

[Formwork installation method]
Next, the formwork installation method according to the present invention, which is carried out using the formwork installation device 1 configured as described above, will be described below with reference to FIG.

In the formwork installation method according to the present invention, the ceiling formwork 2A is placed at a predetermined position in the tunnel 100 by repeating the following six steps (first to sixth steps) a plurality of times (eight times in the present embodiment). It is a method of installing in.

<Step 1>:
In step 1, as shown by the solid line in FIG. 2, the ceiling frame 2A is placed on the pair of left and right carry-in carts 40 on the elevating lift 10 at the lowermost position by using a crane (not shown) or the like. Specifically, the ceiling formwork 2A is placed on each rod 52 of a total of four hydraulic jacks 50, two each of which are installed on a pair of left and right carry-in carts 40. At this time, the rod 52 of each hydraulic jack 50 is in a state of extending upward to a predetermined height.

<Step 2>:
In the step 2, the elevating lift 10 provided with the pair of left and right carry-in carts 40 on which the ceiling formwork 2A is mounted in the step 1 is placed at a predetermined height position (carry-in cart) shown by the chain line in FIG. 2 by the electric chain block 20. The upper surface (running surface) of the upper member 12 of the elevating rib 10 on which the 40 is placed is raised to a height position corresponding to the upper surface (running surface) of the overhanging running girder 30B. Specifically, when the operator operates the operation switch 29 of the electric chain block 20 and the operation signal is transmitted to the control unit 22 of the electric chain block 20, an electric motor (not shown) of the drive unit 21 is activated. Then, the chain 27 is wound up, and the elevating lift 10 is pulled up to the chain line position in FIG. 2 together with the carry-in trolley 40 and the ceiling formwork 2A supported by the carry-in trolley 40.

<Third step>:
In the third step, the operator manually pushes the pair of left and right carry-in carts 40 mounted on the elevating lift 10 pulled up to the chain line position in FIG. 2 in the second step, and these carry-in carts. 40 is moved to a pair of left and right overhanging traveling girders 30B together with the ceiling frame body 2A. Then, the operator manually pushes the left and right carry-in carts 40 and moves them along the guide rails 30 (overhanging traveling girder 30B and traveling beam 30A) to a predetermined position in the longitudinal direction of the tunnel 100 (position a shown in FIG. 2). ..

<4th step>:
In the fourth step, the ceiling frame body 2A is transferred onto the pair of left and right traveling beams 30A from the carry-in carriage 40 transferred to the position a in FIG. 2 in the third step. The transfer of the ceiling frame 2A to the traveling beam 30A is performed by lowering the rods 52 of a total of four hydraulic jacks 50 that support the ceiling frame 2A.

Here, the positional relationship between the traveling beam 30A and the carry-in trolley 40 is such that the ceiling formwork 2A supported by the traveling beam 30B is at a predetermined height position (as shown in FIG. 1, the ceiling formwork 2A and the tunnel 100 are primary. It is preset so as to be installed at a height position where a predetermined radial gap δ is formed between the lining surface 100a and the lining surface 100a.

<Step 5>:
In step 5, the ceiling formwork 2A is transferred to the pair of left and right traveling beams 30B in the step 4, and as a result, the empty carry-in trolley 40 is moved along the pair of left and right traveling beams 30A and the overhanging traveling girder 30B. Move it backward and return it to the lift 10.

<Step 6>:
In step 6, the elevating lift 10 on which the carry-in carriage 40 returned to the position shown by the chain line in FIG. 2 in the step 5 is mounted is shown by the solid line in FIG. 2 along the pair of left and right guide columns 3. Lower to the bottom. Specifically, when the operator operates the operation switch 29 of the electric chain block 20 and the operation signal is transmitted to the control unit 22 of the electric chain block 20, the electric motor (not shown) of the drive unit 21 is activated. Then, the chain 27 is wound up, and the elevating lift 10 is lowered to the solid line position in FIG. 2 together with the carry-in carriage 40. After that, the above steps 1 to 6 are repeated a plurality of times (8 times in this embodiment). Therefore, a plurality (8) ceiling formwork 2A can be sequentially installed from the front to the rear at predetermined positions (positions a to h shown in FIG. 2) in the tunnel 100.

As described above, according to the formwork installation method according to the present invention implemented by using the formwork installation device 1 according to the present invention, the ceiling formwork 2A is individually lifted and individually placed at a predetermined height position. Since there is no need for positioning, it is possible to obtain the effect that the ceiling formwork 2A can be efficiently positioned and installed at a predetermined height position efficiently in a short time with a simple configuration.

When a plurality of ceiling formwork 2A are sequentially installed at predetermined positions in the tunnel 100 as described above, the side formwork 2Bs are connected to the left and right sides of each ceiling formwork 2A as shown in FIG. A notched circular tunnel formwork 2 is assembled, and a predetermined radial gap δ is formed between the tunnel formwork 2 and the primary lining surface 100a of the tunnel 100. Then, by placing concrete in the radial gap δ, the primary lining surface 100a of the tunnel 100 is secondary lining with concrete having a predetermined thickness δ.
The device of the present invention can be used as a device for carrying out the ceiling formwork from the installation position to the ground even in the dismantling of the formwork installed in the tunnel and the secondary lining is completed.

It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made within the scope of claims and the technical idea described in the specification and drawings. Of course.

1 Formwork installation device 2 Formwork 2A Ceiling formwork 2B Side formwork 3 Guide support 10 Lifting lift 20 Electric chain block (driving means)
30 Guide rail 30A Traveling beam 30B Overhanging traveling girder 40 Carry-in trolley 50 Hydraulic jack (support means)
51 Hydraulic jack cylinder 52 Hydraulic jack rod 100 Tunnel δ Radial clearance between the inner surface of the tunnel and the formwork

Claims (7)

A device for installing a formwork in a tunnel with a predetermined radial gap between it and the inner surface of the tunnel.
An elevating lift that moves up and down along a pair of guide columns erected at both ends in the width direction of the tunnel,
A driving means for raising and lowering the elevating lift and
A pair of guide rails arranged parallel to each other along the longitudinal direction at both ends in the width direction of the tunnel,
A pair of carry-in trolleys that can travel along the guide rail along the longitudinal direction of the tunnel.
A pair of telescopic support means installed on the carry-in trolley and
A formwork installation device characterized by being equipped with. The formwork installation device according to claim 1, wherein the drive means is an electric chain block. The formwork installation device according to claim 1 or 2, wherein the support means is a hydraulic jack. The type according to any one of claims 1 to 3, wherein the guide rail is composed of a traveling beam existing in the tunnel and an overhanging traveling girder connected to the traveling beam in a straight line. Frame installation device. The formwork installation device according to any one of claims 1 to 4 is a formwork installation device that can be used as a carry-out device for carrying out from the installation position of the formwork to be dismantled after the secondary lining to the ground. A method of installing the formwork at a predetermined position in the tunnel by using the formwork installation device according to any one of claims 1 to 4.
The first step of placing the formwork on the carry-in carriage on the elevating lift at the lowest level, and
The second step of raising the elevating lift on which the formwork is placed to a predetermined height position by the driving means, and
A third step of moving the carry-in trolley on which the formwork is placed from the elevating lift to the guide rail and traveling the carry-in trolley along the guide rail to a predetermined position in the longitudinal direction of the tunnel.
The fourth step of transferring the formwork from the carry-in carriage to the guide rail, and
The fifth step of moving the empty carry-in trolley along the guide rail and returning it to the elevating lift.
The sixth step of lowering the elevating lift together with the carry-in trolley to the lowest position by the driving means.
A formwork installation method, characterized in that a plurality of the formwork are sequentially installed at predetermined positions in the tunnel along the longitudinal direction of the tunnel by repeating the above a plurality of times. The transfer of the formwork from the carry-in cart to the guide rail in the fourth step is performed by moving the jack installed on the carry-in cart and supporting the formwork downward. The formwork installation method according to claim 6.

Images