Method and device for installing scaffolding.

Abstract

To provide a timbering installation method and a timbering installation device that facilitate transportation and installation of timbering.SOLUTION: A method for installing timbering of the present invention comprises: a suspension step of suspending a plurality of timbering to be installed inside a rehabilitation pipe; a connecting and fixing step of connecting the plurality of suspended timbering at intervals; a transporting step of releasing hanging of the plurality of timbering connected to each other and installing the plurality of connected timbering at predetermined positions in the rehabilitation pipe; and a setting step of fixing the plurality of connected timbering within the rehabilitation pipe.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a method for installing a support and an apparatus for installing a support, which are applied when forming a rehabilitation pipe in an existing pipe.

Background Art

[0002] As a method for rehabilitating an existing pipe such as an aging sewer pipe, after manufacturing a rehabilitation pipe made of a synthetic resin such as rigid vinyl chloride in the existing pipe, a backfill material is injected into the gap between the existing pipe and the rehabilitation pipe and hardened. In the injection of the backfill material, in order to prevent the rehabilitation pipe from buckling and deforming due to the load or injection pressure of the backfill material, or the position of the rehabilitation pipe relative to the existing pipe from shifting from a predetermined position due to buoyancy, supports may be installed at intervals in the axial direction of the pipe inside the rehabilitation pipe (see, for example, Patent Document 1).

[0003] In the installation of the support, corner members and side members forming the polygonal frame of the support are respectively carried into the rehabilitation pipe, assembled, and the frame is erected and fixed to the rehabilitation pipe.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Rehabilitation pipes can reach diameters of over 2 meters depending on the type. When supports are installed on such large-diameter rehabilitation pipes, their size and weight make them prone to wobbling and result in a very unstable installation when assembled and positioned to follow the inner wall of the pipe. Therefore, the installation of supports required at least three workers per support unit to hold them upright and secure them to the rehabilitation pipe. Even with three or more workers, holding such large and heavy supports required considerable attention and effort. Therefore, the present invention provides a method for installing scaffolding and a device for installing scaffolding that facilitate the transportation and installation of scaffolding. [Means for solving the problem]

[0006] The method for installing supports according to the present invention comprises a suspension step of suspending a plurality of supports to be installed inside a rehabilitation pipe, a connection and fixing step of connecting the suspended plurality of supports at intervals, a transport step of unsuspending the plurality of supports that are connected to each other and installing the connected plurality of supports at predetermined positions inside the rehabilitation pipe, and an installation step of fixing the connected plurality of supports inside the rehabilitation pipe. This configuration allows multiple supports to be suspended and connected to each other, making them less likely to tip over horizontally. Furthermore, because multiple supports are suspended, the number of workers required to hold them is reduced.

[0007] In the method for installing the support of the present invention, a suspension device for suspending the support may be installed on the inner wall surface of the existing pipe during the suspension step. This configuration allows work to be performed inside the existing pipe, close to the rehabilitation pipe.

[0008] In the method for installing support structures according to the present invention, the suspension device may be composed of an electric hoist. This configuration makes it easier to suspend the support structure.

[0009] The support used in the support installation method of the present invention has at least a polygonal or circular ring portion, and in the connecting and fixing step, a rod-shaped or plate-shaped connecting member may be used to fix and hold the distance between opposing positions of the ring portions. This configuration allows for easy fixing of multiple supports while maintaining a predetermined distance between them.

[0010] In the method for installing the support of the present invention, the connected multiple supports may be moved into the rehabilitation pipe using a trolley during the transportation process. This configuration makes it easy and stable to move the support structure to its installation location.

[0011] The support installation device of the present invention includes connecting members that connect multiple supports at intervals. This configuration allows multiple supports to be easily connected at predetermined intervals and unitized.

[0012] The support installation device of the present invention may further include a suspension device for suspending the support from the inner wall surface of an existing pipe. Furthermore, the suspension device of the support installation device of the present invention may be configured with an electric hoist. This configuration makes it easy and stable to suspend the support structure.

[0013] The connecting member of the support installation device of the present invention may be composed of a rod-shaped or plate-shaped member. This configuration simplifies the structure of the connecting members. [Effects of the Invention]

[0014] Each of the inventions of this application has the effect of facilitating the transportation and installation of supports. [Brief explanation of the drawing]

[0015] [Figure 1] This is a front view showing a support applied to a support installation method or installation device according to one embodiment of the present invention. [Figure 2]It is a perspective view showing a connecting member used in an installation method or an installation device of a support of an embodiment of the present invention. [Figure 3] It is a perspective view showing a suspension fitting used in an installation method or an installation device of a support of an embodiment of the present invention. [Figure 4] (a), (b) It is a schematic view showing a hanging step of an installation method of a support of an embodiment of the present invention. [Figure 5] It is a perspective view showing a connecting cart for connecting, fixing, and transporting a support of an embodiment of the present invention. [Figure 6] It is a schematic view showing a connecting and fixing step of an installation method of a support of an embodiment of the present invention. [Figure 7] It is a schematic view showing a transporting step of an installation method of a support of an embodiment of the present invention. [Figure 8] It is a photograph showing a state where a support is fixed to a rehabilitation pipe in an installation method of a support of an embodiment of the present invention. [Figure 9] It is a schematic view showing an installation step of an installation method of a support of an embodiment of the present invention.

Mode for Carrying Out the Invention

[0016] Hereinafter, an embodiment of an installation device and an installation method of a support of the present invention will be described with reference to the drawings.

[0017] As shown in FIG. 1, the support 1 has a polygonal (octagonal in this embodiment) ring portion 2. In the case of the support 1 used for a large diameter, it may include two vertical reinforcing members 3 spanned inside the ring portion 2 and a horizontal reinforcing member 4 provided substantially at the center between the upper and lower portions of the ring portion 2. In addition, as the support 1, those in which reinforcing members in various directions are provided on a ring portion 2 having a quadrilateral or more or a circular shape other than the above-described aspect are also within the scope of application of the present invention.

[0018] As shown in FIG. 2, an installation device 5 of a support 1 of an embodiment of the present invention (hereinafter, simply referred to as an "installation device") is a device for connecting a plurality of supports 1, 1 with an interval. Specifically, the installation device 5 is equipped with multiple connecting members 6. The connecting member 6 is composed of a rectangular rod-shaped steel material (rod member) 7. The rod member is formed to have a length that is sufficient for installing the support 1. In addition, it is also possible to use a long steel plate for the connecting member 6, as long as rigidity can be ensured.

[0019] Fixing parts 8 for securing the support 1 are provided at both ends of the rod member 7. The fixing portion 8 is composed of a pair of rising wall portions 9, 9 provided at both ends of one face of the connecting member 6, and a bolt 10 inserted through the tip of the pair of rising wall portions 9, 9. The pair of rising wall sections 9, 9 are provided at intervals that allow the support 1 to be sandwiched in the longitudinal direction without forming a large gap at both ends of the connecting member 6.

[0020] The bolt 10 is inserted through the tip of the rising wall portion 9 so that when the support 1 is placed between the pair of rising wall portions 9, 9, the support 1 can be almost perfectly sandwiched between it and the rod member 7.

[0021] The installation device 5 may further include a suspension fitting 11, as shown in Figure 3, which creates a starting point for holding the support 1 when suspending it. The suspension fitting 11 preferably comprises an inverted U-shaped gripping portion 11a for gripping the support 1, a suspension portion 11b that protrudes above the gripping portion 11a and has a hole h formed therein for inserting a member of another device, and a bolt 10 for securing the support 1 held in place by the gripping portion 11a.

[0022] Furthermore, the installation device 5 may also include a suspension device 15 as shown in Figure 4(a), in addition to the connecting member 6. A known electric hoist can be suitably used as the suspension device 15. Other examples of the suspension device 15 include manual hoists and chain blocks, as long as they can stably suspend the support 1.

[0023] Furthermore, in addition to the connecting member 6, the installation device 5 may also include a connecting trolley 17, as shown in Figure 5, on which a piece 16 is provided on the side of the connecting member 6 opposite to the side on which the rising wall portion 9 is provided.

[0024] The support 1 is installed inside the rehabilitation pipe X using the connecting member 6, suspension device 15, suspension fitting 11, and connecting trolley 17 as follows.

[0025] <Preparation process for suspension> As shown in Figure 4(a), support materials for forming the support are brought in outside the rehabilitation pipe X, that is, inside the existing pipe Y where the rehabilitation pipe X is not installed, and the support 1 shown in Figure 1 is assembled. In this embodiment, two support units 1 are assembled as a set.

[0026] The suspension portion 11b of the suspension fitting 11 is attached to the ring portion 2 which forms the upper end when the support 1 is raised. The orientation of the suspension fitting 11 is such that when the support 1 is raised, the suspension portion 11b faces upward, and the grip portion 11a is fitted into the ring portion 2. The grip portion 11a is secured by inserting a bolt 10 below where the ring portion 2 is housed and tightening a nut.

[0027] Meanwhile, two suspension devices 15, such as electric hoists, are fixed to the top surface (inner wall surface) of the existing pipe Y by driving anchors into the ground at intervals. The distance between the suspension devices 15 is approximately the same as the distance between the supports 1 determined by the connecting members 6.

[0028] <Hanging process> As shown in Figure 4(b), in the suspension process, the support 1 and the suspension device 15 are connected by a rope 15a. Specifically in this embodiment, the suspension part 11b of the suspension fitting 11 and the electric hoist 15 are connected by a rope 15a, and the two supports 1 are suspended so that the entire ring portion 2 faces each other, that is, in an orientation to be installed on the rehabilitation pipe X.

[0029] <Connection fixing process> The two support structures 1, suspended facing each other, are connected by a connecting member 6, as shown in Figure 6. Specifically, the fixing portion 8 of the connecting member 6 is fitted from the outside at mutually opposing positions on the top, bottom, left, and right sides of the ring portion 2, and the bolt 10 is passed through the tip of the ring portion 2 to secure it. Note that the connecting members 6 attached to the left and right sides of the ring portion 2 may be fitted from the inside of the ring portion 2. The locations of the supports 1 that are fixed by the connecting members 6 can be anywhere as long as the two supports 1 are stably fixed when erected, but fixing them to the top, bottom, left, and right of the ring portion 2 provides stability. Furthermore, a connecting bogie 17 with a piece 16 attached to the connecting member 6 is fixed below the ring portion 2.

[0030] <Transportation Process> Once the two supports 1 are suspended and stably connected by the connecting member 6, as shown in Figure 7, the suspension fitting 11 shown in Figure 4(b) is removed from the upper end of the ring portion 2, and the two supports 1 are moved to the predetermined installation position on the rehabilitation pipe X by utilizing the rotation of the wheel 16 of the connecting trolley 17.

[0031] <Installation process> During the installation process, multiple supports 1,1 connected by connecting members 6 are fixed to the rehabilitation pipe X. In other words, in order to fix the supports 1,1 to the rehabilitation pipe X, the ring portion 2 of support 1 is raised to align with the vertical cross-section of the rehabilitation pipe X at the position where supports 1,1 will be installed inside the rehabilitation pipe X, and while holding it firmly in place, measures are taken to prevent buckling of the rehabilitation pipe X, to perform detailed positioning measures on the rehabilitation pipe X, and further measures are taken to prevent buoyancy.

[0032] Specifically, the buckling prevention measure involves placing a bracing member 50 between the ring portion 2 of the support 1 and the rehabilitation pipe X, as illustrated in Figure 8 or Figure 9. This allows the bracing member 50 to press the rehabilitation pipe X from the inside out (towards the existing pipe) at circumferential positions including near the four corners of the rehabilitation pipe X, thereby correcting and / or preventing deformation of the rehabilitation pipe X. This is done particularly to correct the shape (=correct) when the rehabilitation pipe X deforms due to its own weight and to prevent buckling when backfill material is injected. The bracing member 50 is positioned by screwing a threaded bolt 51 into a female screw hole provided in the ring portion 2 and fixing it, fixing a U-shaped plate member 52 to the tip of the threaded bolt 51, gripping a rod-shaped steel material 53 with the plate member 52 while it is in contact with the inner surface of the rehabilitation pipe X, and then screwing in the threaded bolt 51 to press the rod-shaped steel material 53 against the inner surface of the rehabilitation pipe X.

[0033] In the case of a roughly rectangular or horseshoe-shaped support structure 1 with dimensions of approximately 230 cm in length and width, the above procedure involves assembling 20 to 25 bracing members 50 onto a single support structure 1.

[0034] The rehabilitation pipes X have large diameters of 2m or more, and are designed to effectively demonstrate load-bearing capacity and durability, taking into account the large amount of water flowing inside and other large external forces being applied. Therefore, the rehabilitation pipes X that have deformed flattened by their own weight are corrected back to their designed shape by adjusting the threaded bolts 51 of the bracing members 50. Subsequently, as a detailed positioning procedure for the rehabilitation pipe X, fine adjustments are made to the dimensions of the rehabilitation pipe X in all directions using the threaded bolts 51 of the bracing members on the top, bottom, left, and right, so that they match the designed dimensions.

[0035] After the shape of the rehabilitation pipe X has been precisely determined, a floating prevention column (not shown) protruding from the top of the ring portion 2 is drilled into a hole at the position of the opposing rehabilitation pipe X, the floating prevention column is inserted through the hole, and its tip is pressed against the inner top surface of the existing pipe to perform the floating prevention measure. With the above work completed, the fixing of supports 1,1 to the rehabilitated pipe X and the shaping of the rehabilitated pipe X are finished, and the rehabilitated pipe X is positioned relative to the existing pipe. The above installation process for support 1 will be carried out with support 1 in a stable upright position using the installation device 5.

[0036] <Backfill material injection work> After all the supports 1 are installed inside the rehabilitation pipe X, backfill material such as mortar is filled between the existing pipe Y and the rehabilitation pipe X. Once the backfill material has cured and hardened to a certain extent, the supports 1 described above are removed in the reverse order of installation and dismantled outside the rehabilitation pipe X.

[0037] Thus, according to the support device 5 and installation method of the present invention, when the support 1 is erected, the supports 1,1 are positioned facing each other in the horizontal direction, which is prone to tipping over, and the supports 1,1 are firmly connected to each other by the connecting member 6. Therefore, the supports 1,1 can be stably erected even without workers supporting them. Therefore, the installation device 5 and installation method of the present invention have the effect of making it very easy to transport the supports 1,1 into the rehabilitation pipe X.

[0038] Furthermore, the procedure involves stably erecting the supports 1,1 in predetermined positions within the rehabilitation pipe X and fixing them to the rehabilitation pipe X, after which the connecting member 6 can be removed. In other words, conventionally, each support 1 had to be assembled one by one within the rehabilitation pipe X, and while the worker held it in the erected position, as described above, for a large-diameter rehabilitation pipe X of about 200cm to 230cm, it was necessary to place about 20 to 25 bracing members, which was extremely strenuous and required long hours of work. However, with the installation device 5 of the present invention, the supports 1,1 are fixed and supported in the axial direction of the pipeline while in the erected position.

[0039] Therefore, according to the present invention, when transporting and installing the support structure 1, the need to expend a great deal of human effort to prevent the support structure 1, which is very heavy, from falling over is minimized, and the support structure 1 can be handled safely and stably.

[0040] Furthermore, according to the method of installing supports of the present invention, the supports 1,1 can be unitized by the installation device 5. Moreover, by fixing the supports 1,1 at installation intervals within the rehabilitation pipe X, multiple supports 1,1 connected by the installation device 5 can be simultaneously placed at predetermined positions within the rehabilitation pipe X. Therefore, multiple supports 1 can be transported and installed in the rehabilitation pipe X simultaneously, and the supports 1,1 can be kept upright stably, allowing workers to concentrate on fixing bracing materials 50 to multiple supports 1,1, and thereby significantly increasing the installation efficiency of the supports 1,1.

[0041] Conventionally, in order to maintain a single support 1 as stably as possible while it is erected inside the rehabilitation pipe X, a hole was drilled in the rehabilitation pipe X and an anti-floating rod (not shown) was braced between the support 1 and the existing pipe, and the lower bracing material 50 was fixed to temporarily hold the support from above and below, and then the worker held the support 1 from the left and right and attached the remaining bracing material 50. However, in that case, since a hole is drilled in the rehabilitation pipe X first, if the shape of the rehabilitation pipe X is corrected with the bracing material 50, the spacing of the anti-floating rods changes and they may be erected in a V-shape or inverted V-shape, resulting in a slightly inaccurate anti-floating dimension.

[0042] However, by using the installation device 5 and installation method of the present invention, the supports 1,1 can be stably erected, eliminating the need to first brace the anti-float rod. Therefore, according to the installation device 5 and installation method of the present invention, the anti-float rod can be installed appropriately, and the anti-float dimensions can be accurately determined.

[0043] Furthermore, since the support structure 1 is suspended by an electric hoist as the suspension device 15, it has the effect of being able to easily and stably erect the support structure 1 while minimizing human labor.

[0044] Furthermore, a connecting trolley 17, which is composed of a connecting member 6 having a piece 16, can be attached below the ring portion 2. This provides the advantage that after connecting the two supports 1, the suspension from the suspension device 15 can be released, and the supports 1,1 can be pushed directly into the rehabilitation pipe X to move them very easily.

[0045] In the above embodiment, an example was shown in which two support units 1 are connected as a set and installed on the rehabilitation pipe X. However, the number of support units 1 is not limited to two as long as multiple units are used as a set; there may be three or more. Furthermore, while it is preferable to fix the suspension fitting 11 to the ring portion 2 of the support 1, this is not essential if the ring portion 2 itself has a point for stable connection to the suspension device 15.

[0046] Furthermore, a connecting trolley 17 is preferred as a trolley for transporting the support 1 into the rehabilitation pipe X, with a piece 16 provided on the opposite side of the connecting member 6 from the fixing part 8. However, any trolley capable of transporting the support 1 is acceptable. Furthermore, as long as the connecting member 6 can be fixed so as not to swing in the direction that the supports 1,1 fall, it is not necessary for the ring portions 2 to be connected to each other. The connecting member 6 may also be fixed to a vertical reinforcing member 3 or a horizontal reinforcing member 4 fixed at two points within the ring portion 2, or to a diagonally placed reinforcing member (not shown). [Explanation of Symbols]

[0047] 1. Support 5 Installation equipment 6. Connecting Members 7 Bar member 8 Fixed part 9. Rising wall section 10 volts 11 Hanging hardware 15. Lifting device (electric hoist) 16 pieces 17. Connecting bogie (connecting component) X rehabilitation pipe Y Existing pipe

Claims

1. The process involves suspending multiple supports to be installed inside the rehabilitation pipe, A connecting and fixing step of connecting multiple suspended supports at intervals, A transport process in which the suspension of the multiple supports connected to each other is released and the multiple supports connected to each other are installed in predetermined positions within the rehabilitation pipe, A method for installing supports, comprising an installation step of fixing the plurality of connected supports inside a rehabilitation pipe.

2. The method for installing a support according to claim 1, wherein in the suspension process, a suspension device for suspending the support is installed on the inner wall surface of an existing pipe.

3. The method for installing support according to claim 2, wherein the suspension device is configured with an electric hoist.

4. The support has at least a polygonal or circular ring portion, The method for installing a support according to any one of claims 1 to 3, wherein in the connecting and fixing step, a rod-shaped or plate-shaped connecting member is used to fix and hold the distance between the opposing positions of the ring portions.

5. A method for installing supports according to any one of claims 1 to 4, wherein in the transport process, the connected plurality of supports are moved into the rehabilitation pipe by a trolley.

6. The rehabilitation pipe is installed at intervals in the depth direction and comprises two or more connecting members that connect multiple supports having polygonal or circular ring portions and arranged adjacent to each other in the depth direction to support the bracing material, The connecting member is composed of a columnar or plate-shaped rod member, A support installation device is provided in which a plurality of supports can be stably erected, with rising wall portions provided at both ends in the longitudinal direction of the rod member to clamp and fix the support from the longitudinal direction.

7. The support installation device according to claim 6, further comprising a suspension device for suspending the support from the inner wall surface of an existing pipe.

8. The support installation device according to claim 7, wherein the suspension device is configured with an electric hoist.

9. The support installation device according to claim 6, wherein the connecting member installed on the bottom side of the support has a piece on the side opposite to the side on which the rising wall portion is provided.

Images