JP2023161930A - Disassembling method of support frame, horizontally placing auxiliary tool of deformation preventing frame, and disassembling device of support frame - Google Patents

Abstract

To provide a disassembling method of a support frame, a horizontally placing auxiliary tool, and a disassembling device of the support frame.SOLUTION: A disassembling method of a support frame comprises: a deformation preventing fixation step of attaching, to a first deformation preventing frame disposed outermost on an upstream side and/or a downstream side and a second deformation preventing frame disposed next thereto among ring-shaped deformation preventing frames constituting the support frame, a connection fixation member that connects and fixes the two deformation preventing frames and a horizontally placing auxiliary tool that grips a lower part frame member of the second deformation preventing frame at one end thereof and supports rotatably a lower part of the first deformation preventing frame at the other end thereof; a hanging member installation step of attaching a hanging tool to an upper part of the first deformation preventing frame and hooking a hanging cable to the hanging tool; a wale material removing step of removing wale materials other than a wale material that supports the lower part frame member; a connection fixation member removing step of removing the connection fixation member from the first deformation preventing frame and the second deformation preventing frame; and a horizontal installation step of laying down horizontally the first deformation preventing frame while controlling rotation of the first deformation preventing frame.SELECTED DRAWING: Figure 3

Description

The present invention relates to a support dismantling method applied when forming a rehabilitated pipe to an existing pipe, a deformation prevention frame horizontal placement aid, and a support dismantling device.

As a method of rehabilitating existing pipes such as aging sewer pipes, a rehabilitated pipe made of synthetic resin such as hard vinyl chloride is manufactured inside the existing pipe, and then a backfilling material is injected into the gap between the existing pipe and the rehabilitated pipe. A method of curing is widely used. When injecting backfilling material, in order to prevent the rehabilitated pipe from buckling and deforming due to the load and injection pressure of the backfilling material, and from shifting the position of the rehabilitated pipe relative to the existing pipe from the specified position due to buoyancy, Supports are sometimes installed inside the tube at intervals in the tube axis direction (for example, see Patent Document 1).

JP2013-256854

Depending on the diameter of the rehabilitated pipe, it may be more than 2 meters long. When removing the support deformation prevention frame installed in such a large-diameter rehabilitation pipe, it is necessary to firmly hold the deformation prevention frame so that it does not fall down carelessly when removing the raised material. In addition, since the size of one deformation prevention frame is very large and the weight can exceed 100 kg, it is difficult to lay down the deformation prevention frame erected for transportation horizontally, which requires considerable attention and effort. and time consuming.
Therefore, the present invention provides a method for dismantling a support that facilitates the disassembly of the support and improves work efficiency, and a horizontal placement aid for a deformation prevention frame.

The shoring dismantling method of the present invention is performed on the upstream and/or downstream side of the ring-shaped deformation prevention frames that constitute a plurality of shorings that are installed at intervals inside a rehabilitated pipe when the rehabilitated pipe is formed. The first deformation prevention frame and the second deformation prevention frame are connected to a first deformation prevention frame installed in the first deformation prevention frame and a second deformation prevention frame installed adjacent to the first deformation prevention frame. a connecting and fixing member that holds and fixes the lower frame material of the second deformation prevention frame; and a horizontal placement aid that grips and fixes the lower frame material of the second deformation prevention frame at one end and rotatably supports the lower part of the first deformation prevention frame at the other end. a deformation prevention frame fixing step for attaching the tool, and fixing one end of the suspension rope to the upper part of the first deformation prevention frame, and extending the length between the suspension rope and the upper part of the first deformation prevention frame. After the hanging member installation step of attaching the cable to the upper part of the second deformation prevention frame, the deformation prevention frame fixing step, and the hanging member installation step, A raising material removal step of removing the raising material; and a connecting fixing member release step of removing the connecting fixing member from the first deformation prevention frame and the second deformation prevention frame after the raising material removal step. and horizontal installation of the first deformation prevention frame horizontally using the suspension rope and the horizontal placement aid while controlling the speed at which the first deformation prevention frame is laid down by operating the suspension rope. It has a process.
According to this configuration, the first deformation prevention frame is fixed to the second deformation prevention frame with the horizontal placement aid, and the hanging rope is directly attached to the first deformation prevention frame and the second deformation prevention frame, and the first In order to remove the deformation prevention frame, the first deformation prevention frame can be removed in its installed position.

In the horizontal installation step of the shoring dismantling method of the present invention, the first deformation prevention frame is mounted by applying the outermost portion of the lower frame material of the first deformation prevention frame to a surface formed in an arc shape. You can defeat it.
According to this configuration, the sideways movement of the first deformation prevention frame becomes stable and smooth.

In the upholstery material removal step of the shoring dismantling method of the present invention, the upholstery materials may be sequentially removed from the top to the bottom.
According to this configuration, the support of the deformation prevention frame can be released more stably.

In the connecting fixing member release step of the shoring disassembly method of the present invention, the removed connecting fixing member is attached to the second deformation prevention frame and a third deformation prevention frame further adjacent to the second deformation prevention frame. It may be fixed.
According to this configuration, it is possible to perform the work of releasing the support with high work efficiency.

In the horizontal installation step of the shoring dismantling method of the present invention, a truck member having a piece is installed in the rotational direction of the first deformation prevention frame, and the first deformation prevention frame is horizontally mounted on the truck member. You can also put it down.
According to this configuration, the deformation prevention frame can be efficiently removed.

The horizontal placement aid for the deformation prevention frame of the present invention is suitable for the upstream and/or downstream side of the ring-shaped deformation prevention frames that constitute a plurality of supports installed at intervals inside the rehabilitation pipe when the rehabilitation pipe is formed. The upper wall part and the lower wall part are arranged to sandwich the lowermost frame material of the first deformation prevention frame installed on the outermost side of the side from above and below, and the inner surface of the upper wall part has an arc-shaped radius. a rounded clamp having a surface formed therein and rotatably supporting the lower frame material; and a second deformation clamp installed adjacent to the first deformation prevention frame with an interval from the first deformation prevention frame. a fixing part that grips and fixes the lowermost frame material of the prevention frame; and a connecting rod part that connects the rounded clamp and the fixing part, and When the fixation of the frame is released and the frame is placed horizontally on the opposite side to the second deformation prevention frame, it assists in the smooth laying down of the frame.
According to this configuration, the sideways movement of the first deformation prevention frame becomes stable and smooth.

The length of the connecting rod portion of the horizontal placement aid for the deformation prevention frame of the present invention may be formed to be expandable and retractable.
According to this configuration, the horizontal placement aid can be easily adjusted to the difference in distance between the deformation prevention frames.

The shoring dismantling device of the present invention is provided with a fixing part that fixes any one of the horizontal placement aids and the lower frame material of the first deformation prevention frame and the lower frame material of the second deformation prevention frame, respectively. A connecting and fixing member provided at both ends of a connecting rod, and a hanging cable attached to the upper frame material of the first deformation prevention frame and the upper frame material of the second deformation prevention frame.
According to this configuration, it is possible to perform the work of releasing the support with high work efficiency.

Each invention of the present application has the effect of facilitating the dismantling of supports and improving work efficiency.

FIG. 2 is a front view showing a state in which a support according to an embodiment of the present invention is installed inside a rehabilitated pipe. FIG. 2 is a perspective view showing a part of a connecting and fixing member according to an embodiment of the present invention. (a) A side view showing a clamp with a radius of the horizontal placement aid according to an embodiment of the present invention, and (b) a plan view of the clamp with a radius. (a) A side view showing a fixing part of a horizontal placement aid according to an embodiment of the present invention, and (b) a plan view of the fixing part. It is a schematic diagram showing the dismantling process of the support of one embodiment of the present invention. It is a schematic diagram showing the dismantling process of the support of one embodiment of the present invention. It is a schematic diagram showing the dismantling process of the support of one embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a shoring dismantling device and a shoring dismantling aid according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the support 1 includes a polygonal (octagonal in this embodiment) deformation prevention frame 2, a plurality of braces 3 fixed in the circumferential direction of the rehabilitation pipe X, and the deformation prevention frame 2 and the belly. It has a support member 4 that sets the distance to the raising material 3 and a floating prevention pillar 5. Although not essential, for reinforcement purposes, the deformation prevention frame 2 with the large diameter of the rehabilitated pipe It is equipped with In addition to the above embodiments, the present invention is also applicable to the support 1 that uses a deformation prevention frame 2 that is more than rectangular or circular.

The deformation prevention frame 2 is a highly rigid member that serves as a pressing base when shaping the rehabilitated pipe X by, for example, pressing the rehabilitated pipe X with a raised material 3, which will be described later.
The deformation prevention frame 2 includes a frame member 8 made of a long square steel pipe member having a substantially rectangular cross-sectional view, which is arranged approximately along the inner wall of the rehabilitated pipe X, with the pipe axis direction substantially horizontally or substantially vertically; A corner member 9 connecting the ends of the frame material 8 is provided.

For example, the frame material 8 of the deformation prevention frame 2 used for a rehabilitated pipe X with a large diameter of 2 m or more is ), square steel pipes are often used, with dimensions of about 1.5 m, cross-sectional dimensions of about 100 mm x 100 mm, thickness of 3 to 4 mm, and weight of 30 kg or more.
The corner member 9 has a structure in which the length of the frame material 8 in the tube axis direction is appropriately set, and has connecting portions (not shown) at both ends into which the ends of the frame material 8 are fitted and fixed with bolts. .

Although the shape of the deformation prevention frame 2 is not limited, in this embodiment, in addition to the frame material 8 and the corner members 9, it is assembled into a roughly octagonal shape by the vertical reinforcing member 6 and the horizontal reinforcing member 7.
The deformation prevention frame 2 having such a configuration is arranged between the upstream end and the downstream end of the rehabilitated pipe X at a substantially constant interval in the direction of the axis L of the rehabilitated pipe There are multiple locations in between. The installation interval of the deformation prevention frames 2 is not particularly limited as long as it is an appropriate interval for shaping and holding the rehabilitated pipe X. Deformation prevention frames 2 used for rehabilitation pipes X having a large diameter of 2 m or more may be installed at intervals of 2 m, for example.

The raised material 3 is formed using a square pipe with a rectangular cross section. The length of the raised member 3 in the tube axis direction is formed to match the installation interval of the deformation prevention frame 2 in the direction of the axis L of the rehabilitated tube X.
A plurality of the raising members 3 are installed on the inner wall surface of the rehabilitated pipe X at intervals in the circumferential direction, with the pipe axis direction parallel to the axis L of the rehabilitated pipe X.

The support member 4 is a generally rod-shaped member, one end of which is fixed to the deformation prevention frame 2, the backing material 3 is fixed at the other end, and the support member 4 is extended between the deformation prevention frame 2 and the backing material 3 for rehabilitation. This is a member that shapes the tube X. In the present embodiment, the support member 4 mainly includes a jack bolt and a plate member formed in a U-shape in cross-section by a steel plate that grips and fixes the upright member 3 on the other end side of the jack bolt. Can be formed.
Specifically, a plurality of supporting members 4 are arranged at intervals in the tube axis direction of each frame member 8. A raised member 3 is disposed at the other end of the support member 4 .

The floating prevention pillar 5 has one end of the jack bolt passing through the rehabilitated pipe It is arranged.

As described above, a plurality of supports 1 are installed between the upstream end and the downstream end of the rehabilitated pipe X.
Next, an embodiment of the support dismantling apparatus of the present invention, which is used when dismantling the support 1 installed as described above, will be described.

As shown in FIGS. 2 to 4 or 5, the shoring dismantling device includes a connecting fixing member 11 (see FIG. ), a horizontal placement aid 12 (see FIGS. 3 and 4) used when the deformation prevention frame 2 is laid down and laid down, and a hanging rope 25 (see FIG. 6) that constitutes a hanging member. There is.

5 and 6 are schematic diagrams showing the process of dismantling the support. The rounded clamp 21 and fixing portion 22 of the horizontal placement aid 12 shown in FIG. 3 and the fixing portion 15 of the connecting member 11 shown in FIG. 4 are shown in a simplified manner.
As shown in FIG. 5(a), the connecting fixing member 11 has a first deformation prevention frame 2A that is erected on the outermost side of the upstream and/or downstream side of the rehabilitated pipe X, and is erected next to it. This is a member that is fixed to the second deformation prevention frame 2B, which stably maintains the upright state of the first deformation prevention frame 2A.
As shown in FIG. 2, the connecting and fixing member 11 has a fixing portion 15 and a connecting rod 16 that are immovably fixed to the first and second deformation prevention frames 2A and 2B, respectively.

In this embodiment, the fixing part 15 includes three mounting plate parts 17 disposed on three surfaces of the frame material 8, and a fastening member 18 (in this embodiment, a bolt) for fastening the mounting plate part 17 to the frame material 8. and a nut) and a clamp having a fixing part 19 to the connecting rod 16. The three mounting plate portions 17 are rotatably connected to the mounting plate portions 17, 17, which are arranged in series, respectively, about a rotating shaft 17a. The mounting plate portions 17, 17 at both ends of the three mounting plate portions 17 are formed so that a bolt can be inserted between the two mounting plate portions 17, 17 when these are opposed in parallel.

The connecting rod 16 includes a highly rigid tube member that is placed between the deformation prevention frames 2 . Fixing parts 15 are attached to both ends of the connecting rod 16 by tightening bolts, nuts, or the like. The tube member is not particularly limited as long as it has the rigidity to hold the deformation prevention frame 2, but in this embodiment, it is formed of a single steel tube.

As shown in FIGS. 3 and 4, the horizontal placement aid 12 includes a rounded clamp 21 having an upper wall plate having a rounded portion 20 at one end of a connecting rod 23, and a rounded clamp 21 provided at the other end of the connecting rod 23. This is a member including a fixing part 22.

As shown in FIG. 3, the rounded clamp 21 includes a lower wall plate 21c formed in a rectangular shape when viewed from the bottom, a back wall plate 21b rising substantially perpendicularly from one end side of the lower wall plate 21c, and a back wall plate 21b. After forming a rounded portion 20 from the upper end side, it mainly has an upper wall plate 21a extending parallel to a lower wall plate 21c. The rounded clamp 21 further includes a threaded rod portion 21j that projects substantially perpendicularly from the outer surface 21p of the back wall plate 21b.

The upper surface of the lower wall plate 21c has a predetermined width dimension that can stably support the lower part of the frame material 8 (i.e., a dimension along the pipe axis direction of the frame material 8), and a width dimension that can stably support the lower part of the frame material 8. The depth dimension (that is, the dimension in the direction orthogonal to the width dimension) is approximately less than twice the depth dimension of the frame material 8 .

The back wall board 21b has a width dimension equivalent to that of the lower wall board 21c, and a height dimension slightly larger than the height dimension of the lower frame material 8 installed horizontally in the rehabilitation pipe X. .
The inner surface of the rounded portion 20 of the upper wall board 21a is bent at an angle of 40 to 45 degrees with the frame member 8 lifted so that the upper corner of the frame member 8 abuts the upper end of the back wall board 21b. When rotated to a certain extent, the upper corner curves in an arc shape and extends upward.

The upper wall plate 21a is formed to have the same width dimension as the lower wall plate 21c and the same depth dimension as the lower wall plate 21c in plan view. The upper wall board 21a (that is, the back wall board 21b and the lower wall board 21c) has a width dimension that allows the lower frame material 8 to be held down without wobbling.
A bolt insertion hole 21h through which a bolt 21d passes vertically is formed in the upper wall plate 21a and the lower wall plate 21c.

The bolt insertion hole 21h is provided at a position away from the frame material 8 so that the frame material 8 placed inside the rounded clamp 21 can easily rotate. The bolt 21d is designed to prevent the bolt 21d from jumping out from the rounded clamp 21 when the deformation prevention frame 2 is knocked down.
The lower wall plate 21c, the back wall plate 21b, and the upper wall plate 21a are integrally formed of a highly rigid steel plate. The upper wall plate 21a and the back wall plate 21b are set to have a larger thickness than the lower wall plate 21c in order to strengthen their rigidity.

As shown in FIG. 4, the fixing portion 22 includes a lower wall plate 22c having a rectangular flat surface, a rear wall plate 22b rising approximately perpendicularly from the edge of the lower wall plate 22c, and a rear wall plate 22b. This clamp member mainly includes an upper wall plate 22a extending parallel to and facing a lower wall plate 22c from the upper end. The fixing portion 22 further includes a threaded rod portion 22j that projects substantially perpendicularly from the outer surface 22p of the back wall plate 22b.
The lower wall plate 22c, the inner wall plate 22b, and the upper wall plate 22a of the fixing portion 22 are formed with a width dimension that allows the frame material 8 to be held without wobbling.
The height of the back wall board 22b is set to be slightly larger than the frame material 8 so that the fixing portion 22 can be smoothly fitted into the frame material 8 and the frame material 8 can be held without rattling in the vertical direction. is set to .

The clamps are attached to the upper wall plate 22a and the lower wall plate 22c of the fixed part 22, with the frame material 8 substantially fitting to the inner wall surfaces of the lower wall plate 22c, the back wall plate 22b, and the upper wall plate 22a. An insertion hole 22h for a fastener (bolt and nut in this embodiment) 22d for tightening the clamp portion so that it does not move relative to the clamp member 8 is formed.

The connecting rod portion 23 includes a steel pipe member 24a and a handle nut 24b. The pipe member 24a has a handle nut 24b at both ends thereof, and the handle nut 24b is tightened with the rounded clamp 21 and the threaded rod parts 21j and 22j of the fixing part 22 inserted to a predetermined dimension at both ends. This makes it possible to adjust and fix the entire length of the horizontal placement aid 21.

As shown in FIG. 6(a), the hanging rope 25 is not particularly limited as long as it has sufficient durability to suspend the deformation prevention frame 2, and can be a highly durable string such as a wire rope. A member having a shape can be used.

Using the above-mentioned support dismantling device equipped with the connecting fixing member 11, the horizontal placement aid 12, and the hanging measure 25, the support 1 is removed from the rehabilitation pipe X and removed in the following manner.

<Deformation prevention frame fixing process>
As shown in FIG. 5(a), when removing the shoring, first remove the first deformation prevention frame 2A installed at the outermost side of the rehabilitation pipe The connecting fixing member 11 and the horizontal placement aid 12 are attached to the second deformation prevention frame 2B.

It is preferable that the connecting fixing member 11 is fixed mainly to the lower side of the deformation prevention frame 2 at at least three places, and symmetrically fixed at four places. Stability is improved by fixing the connecting fixing member 11 at three or more locations on the deformation prevention frame, and even more stability is achieved by fixing it approximately symmetrically at four or more locations.Installed on rehabilitated pipes X that are 2 m or longer. This is because even with a deformation prevention frame that has been modified, it is possible to eliminate wobbling as much as possible. However, if the connecting fixing member 11 can securely fix the first deformation prevention frame 2A to be removed from the second deformation prevention frame 2B which is maintained in an upright position, the fixing location is particularly limited. Not limited.

More specifically, as shown in FIG. 1, for example, the fixing portion 15 of the connecting fixing member 11 is connected to the intersection of the vertical reinforcing member 6 and the horizontal reinforcing member 7 of the first deformation prevention frame 2A and the second deformation prevention frame 2B. It is fixed to the immediate outside of the deformation prevention frame 2 and to the lower side of a frame member 8 extending substantially vertically on both left and right sides of the deformation prevention frame 2. The connecting and fixing member 11 is fixed by attaching the connecting rod 16 of the connecting and fixing member 11 to the vertical reinforcing member 6 and the horizontal reinforcing member 7 at a position where the first deformation prevention frame 2A and the second deformation prevention frame 2B face each other. It is fixed so that it extends in a direction perpendicular to the opposite direction.

The horizontal installation aids 12 are installed at two spaced apart locations on the lower frame member 8 of the deformation prevention frame 2 installed substantially horizontally at the bottom of the rehabilitated pipe X, and more specifically, installed immediately inside the vertical reinforcing member 6. do.
The fixing portion 22 of the horizontal placement aid 12 is firmly fixed to the lower frame member 8 of the second deformation prevention frame 2B. Specifically, with the bolt removed, the fixing part 22 is pushed into the lower frame material 8 of the second deformation prevention frame 2B until the back wall plate 22b firmly contacts it, and the bolt is inserted into the bolt insertion hole 22h. , secure the bolt by tightening the nut.

The rounded clamp 21 of the horizontal placement aid 12 is installed so as to hold the lowermost frame member 8 of the first deformation prevention frame 2A. Specifically, push the clamp until the back wall plate 22b of the rounded clamp 21 firmly contacts the lowermost frame material 8 of the first deformation prevention frame 2A, pass the bolt through the bolt insertion hole 21h, and fasten it with a nut. .

<Hanging member installation process>
As shown in FIG. 5(b), the hanging rope 25 is attached to an upper frame member 8 provided horizontally at the top of the first deformation prevention frame 2A and the second deformation prevention frame 2B. The mounting position is preferably at the center of the upper frame member 8 in the longitudinal direction. By attaching the suspension rope 25 to the center of the upper frame material 8, the deformation prevention frame can be tilted in the direction of rotation about the lower frame material 8 without any deviation from side to side.
One end of the hanging rope 25 is attached and fixed to the upper frame member 8 of the first deformation prevention frame 2A. Then, the hanging rope 25 is wound around the upper frame member 8 of the second deformation prevention frame 2B once, and the other end of the hanging rope 25 is stretched downward so that the operator can grasp it.
Note that either of the deformation prevention frame fixing process and the hanging member installation process may be performed first.

<Removal process of raised material>
When the deformation prevention frame fixing process and the hanging member installation process are completed, the first deformation prevention frame 2A is fixed so as not to shake by the second deformation prevention frame 2B. Therefore, the tension of the anti-floating pillar 5 and the support member 4 of the raised material 3, which are stretched between the rehabilitated pipe will be gradually removed. At this time, it is preferable to temporarily fix the upper frame members 8, 8 of the first deformation prevention frame 2A and the second deformation prevention frame 2B using a lever block (registered trademark) or the like.
The lower frame member 8 and the support members 4 between the corner members 9 at both ends thereof and the rehabilitated pipe X are maintained in tension, and the arrangement of the raised members 3 is maintained as is.

<Connection fixed member release process>
After the removal process of the belly raising material 3 is completed, as shown in FIG. 6(a), the hanging rope 25 is placed under tension between the first deformation prevention frame 2A and the second deformation prevention frame 2B. shall be. Then, all the connecting and fixing members 11 that connect and fix the first deformation prevention frame 2A and the second deformation prevention frame 2B are removed.
As a result, the first deformation prevention frame 2A is held only by the rounded clamp 21, the lower support member 4, the belly raising material 3, and the hanging rope 25.
The removed connection and fixing member 11 is preferably used to connect the second deformation prevention frame 2B and the deformation prevention frame 2 (third deformation prevention frame) installed next.

<Horizontal installation process>
Thereafter, as shown in FIG. 7, the first deformation prevention frame 2A is rounded using the support member 4 supporting the lower frame member 8 of the first deformation prevention frame 2A and the support members 4 of the corner members 9 at both ends thereof. Lift it slightly upwards against the attached clamp 21. When the rear upper corner of the lower frame material 8 hits the upper end of the rear wall plate 21b of the rounded clamp 21, the operator stretches the hanging rope 25 and sends it out one by one, as shown in FIG. 6(a). The deformation prevention frame 2A is slowly pushed down to the opposite side of the second deformation prevention frame 2B.

At this time, the lower frame material 8 of the first deformation prevention frame 2A does not rotate around the lower corner of the opening side as a central axis, but instead moves to a position where the frame material 8 is lifted up, as shown in FIG. The lower corner on the back wall board 21b side rotates while rubbing along the back wall board 21b, and the upper corner on the back wall board 21b side rubs along the inner wall surface of the rounded part 20. In this operation, if the clamp that holds the lower frame material 8 of the first deformation prevention frame 2A does not have the rounded part 20 and there is no inner surface along which the upper back corner fits, most of the clamps that support the first deformation prevention frame 2A This means that the first deformation prevention frame 2A will be tilted in a state where the deformation prevention frame 2A is not in a state where the Therefore, the first deformation prevention frame 2A easily swings within the clamp, and the movement of the first deformation prevention frame 2A becomes awkward. As a result, the first deformation prevention frame 2A may unexpectedly fall down, the rotation axis may become unstable, and when it is knocked down, the first deformation prevention frame 2A may come into contact with the rehabilitation pipe X and damage it.

However, in the horizontal placement aid 12 of this embodiment, when the first deformation prevention frame 2A is rotated, the lower back corner of the frame material 8 is aligned with the back wall board 21b, and the upper back corner is rounded. It can be rotated by applying it to the arc-shaped inner surface of the rounded portion 20 of the attached clamp 21. Therefore, the first deformation prevention frame 2A can be stably rotated about the tube axis of the lower frame member 8 without significantly wobbling the axis. That is, the deformation prevention frame 2 can be laid down sideways while supporting the lower frame member 8 and the upper frame member 8, respectively. As a result, the first deformation prevention frame 2A can be correctly and stably laid down in the desired direction, and the first deformation prevention frame 2A can be laid down without damaging the rehabilitated pipe X and with good working efficiency. .

When laying down the first deformation prevention frame 2A, as shown in FIG. 6(b), the cart 30 is installed in a position where the first deformation prevention frame 2A is laid down, After the frame 2A is installed horizontally, it can be transported and removed as is.
After removing the first deformation prevention frame 2A, the second deformation prevention frame 2B and the third deformation prevention frame 2C are used as the new first deformation prevention frame 2A and second deformation prevention frame 2B, and the above steps are performed. Repeat this step to remove the deformation prevention frame 2 and remove the support 1.

As described above, according to the support disassembly aid and the horizontal placement aid 12 for the deformation prevention frame 2 of the present embodiment, the first deformation prevention frame 2A can be removed stably and efficiently and transported. .

Furthermore, according to the shoring dismantling method of the present invention, the method of suspending the deformation prevention frame 2 from the ceiling surface outside the rehabilitation pipe X using a ceiling anchor hoist or the like is not adopted, and the hanging cables 25 are connected to the upper frame material of the deformation prevention frame 2. Work is done by attaching it directly to 8. Therefore, the work of temporarily fixing the plurality of deformation prevention frames 2 with the connecting fixing members 11, carrying them out of the rehabilitation pipe can be dismantled and transported. Therefore, the shoring dismantling method of the present invention has the effect of reducing the number of work steps and making it possible to proceed efficiently.

In addition, in the step of removing the tensioner, after the connecting fixing member 11 is fixed, the upper tensioner 3 is sequentially removed, so that the work can be carried out stably.
Furthermore, in the connection and fixing member release step, the removed connection and fixation member 11 is fixed to the deformation prevention frames 2, 2 to be worked on next, so the work can be done efficiently and stably.

Note that not only the horizontal placement aid 12 but also the connecting rod 16 of the connecting and fixing member 11 may be configured to be expandable and retractable. With this configuration, it is possible to suitably adjust the distance between the deformation prevention frames 2 and 2, and the length between the clamp and fixing portions of the horizontal placement aid 12 and the connecting fixing member 11.

1 Support 2 Deformation prevention frame 2A First deformation prevention frame 2B Second deformation prevention frame 3 Raising material 4 Support member 5 Anti-surfacing pillar 11 Connecting and fixing member 12 Horizontal placement aid 15 Fixing part 16 Connecting rod 20 Rounded part 21 Clamp with radius 22 Fixed part 23 Connecting rod part 25 Suspension rope 30 Connecting trolley X Rehabilitation pipe Y Existing pipe

Claims (8)

The first deformation prevention frame installed on the outermost side of the upstream and/or downstream side of the ring-shaped deformation prevention frames that constitute the supports that are installed at intervals inside the rehabilitation pipe when the rehabilitation pipe is formed. A connecting and fixing member that connects and fixes the first deformation prevention frame and the second deformation prevention frame to the frame and the second deformation prevention frame installed adjacent to the first deformation prevention frame, and a deformation prevention frame fixing step of attaching a horizontal placement aid that grips and fixes the lower frame material of the second deformation prevention frame at one end and rotatably supports the lower part of the first deformation prevention frame at the other end; ,
One end of the suspension cable is fixed to the upper part of the first deformation prevention frame, and the suspension cable is attached to the second deformation prevention frame so that the length between the suspension cable and the upper part of the first deformation prevention frame can be freely extended. A hanging member installation process to be attached to the upper part,
After the deformation prevention frame fixing step and the hanging member installation step, a step-up material removal step of removing a push-up material other than the push-up material that supports the lower frame material;
After the raising material removal step, a connecting fixing member releasing step of removing the connecting fixing member from the first deformation prevention frame and the second deformation prevention frame;
a horizontal installation step of using the suspension rope and the horizontal placement aid to horizontally tilt the first deformation prevention frame while controlling the speed at which the first deformation prevention frame is tilted sideways by operating the suspension rope; How to dismantle supports with
The support according to claim 1, wherein in the horizontal installation step, a portion of the lower frame material of the first deformation prevention frame that passes through the outermost side is brought into contact with a surface formed in an arc shape to collapse the first deformation prevention frame. How to disassemble.
3. The shoring dismantling method according to claim 1, wherein in the raising material removal step, the raising materials are sequentially removed from above to below.
According to claim 1 or 2, in the connection fixing member releasing step, the removed connection fixing member is fixed to the second deformation prevention frame and a third deformation prevention frame further adjacent to the second deformation prevention frame. How to dismantle the shoring described.
3. In the horizontal installation step, a cart member having a piece is installed in the rotational direction of the first deformation prevention frame, and the first deformation prevention frame is laid horizontally on the truck member. How to dismantle the shoring described in.
The first deformation prevention frame installed on the outermost side of the upstream and/or downstream side of the ring-shaped deformation prevention frames that constitute the supports that are installed at intervals inside the rehabilitation pipe when the rehabilitation pipe is formed. The frame includes an upper wall portion and a lower wall portion arranged to sandwich the lower frame material of the frame from above and below, and an arc-shaped rounded surface is formed on the inner surface of the upper wall portion, and rotatably supports the lower frame material. A clamp with a radius,
a fixing part that grips and fixes a lower frame material of a second deformation prevention frame that is installed adjacent to the first deformation prevention frame with an interval from the first deformation prevention frame;
a connecting rod portion that connects the rounded clamp and the fixing portion;
A horizontal placement aid for a deformation prevention frame that assists smooth horizontal fall when the first deformation prevention frame is released from the rehabilitation pipe and placed horizontally on the opposite side to the second deformation prevention frame.
The horizontal placement aid according to claim 6, wherein the length of the connecting rod portion is formed to be expandable and retractable.
The horizontal placement aid according to claim 6 or 7;
a connecting fixing member provided with fixing parts at both ends of a connecting rod to fix the lower frame material of the first deformation prevention frame and the lower frame material of the second deformation prevention frame, respectively;
A support dismantling device comprising a hanging cable attached to the upper frame material of the first deformation prevention frame and the upper frame material of the second deformation prevention frame.

Images