JP2010133175A - Jig for reconstruction work of sewerage facilities and jig assembly using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig for reconstruction work which is excellent in a mechanical strength and light in weight and capable of improving construction efficiency and realizing cost reduction and to provide a jig assembly using the same. <P>SOLUTION: An inner frame part 11 constituting a jig 10 has rigidity and includes a curved edge 111, an non-curved edge 112 and connection parts 115, 116. The curved edge 111 has two sides facing each other in a height direction T and is curved in a circular arc shape. The non-curved edge 112 has two sides facing each other in a width direction W. The connection parts 115, 116 are provided at the non-curved edge 112. An outer plate part 13 is mainly composed of a synthetic resin material having elasticity and is fixed to the exterior surface of the inner frame part 11. The jig 10 constitutes a jig assembly 1 by combining a plurality of jigs. In the jig assembly 1, the adjacent non-curved edge 112 is sequentially connected with the connection parts 115, 116 and is a tubular shaped as a whole in a connected state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a jig used for reconstructing a sewerage facility, and a jig assembly using the jig.

  In recent years, concrete manholes installed in sewage pipe networks have become serious social problems due to internal corrosion degradation due to hydrogen sulfide gas generated from sewage. This is because if the corroded portion is left on the inner surface of the manhole without being repaired, the corroded portion is cracked by the earth pressure from the surroundings, and this crack triggers a water leakage accident or a collapse accident.

  For example, Patent Documents 1 and 2 are known as existing manhole reconstruction techniques used to solve the above-described problems. In Patent Documents 1 and 2, the inner surface of the manhole is covered with a cylindrical synthetic resin sheet, and the contact between the inner surface of the manhole and the hydrogen sulfide gas is blocked. Specifically, in Patent Documents 1 and 2, a cylindrical synthetic resin sheet is carried into a manhole after the corroded portion is cleaned, and an adhesive is filled in a gap where the outer surface of the sheet faces the inner surface of the manhole. A synthetic resin sheet is pasted on the inner surface of the manhole after a curing period of the adhesive.

  By the way, in the contents disclosed in Patent Documents 1 and 2, it is necessary to use some kind of tension jig so that the synthetic resin sheet does not shift during the curing period. In this regard, in Patent Document 1, a synthetic resin sheet is supported using a support, and in Patent Document 2, a synthetic resin sheet is supported using a ring-shaped jig.

  However, since the support described in Patent Document 1 is made of an expensive metal, the cost is increased. Moreover, since the support described in Patent Document 1 is made of metal, it is heavy, and it is inconvenient to carry it at the construction site or handle it in a narrow manhole.

  Furthermore, the support work described in Patent Document 1 requires a high level of skill in assembly work and installation work. If the installation of the support is inappropriate, the synthetic resin sheet is stuck on the inner surface of the manhole while the positional deviation occurs, and corrodes again from the positional deviation part.

  In addition, in Patent Document 1, since the internal space of the manhole is blocked by the support work, the work space for the reconstructing worker is lost, and the construction efficiency is reduced.

  On the other hand, since the ring-shaped jig of Patent Document 2 is also made of metal, similarly to Patent Document 1, the problem of incurring high costs and the inconvenience of carrying in a construction site and handling in a narrow manhole are inconvenient. Cause problems.

Since many of these types of concrete manholes are molded products, there is a molding tolerance for each product. In particular, the manhole related to the reconstructing work has a specific problem in that the error of the inner diameter dimension is increased by the amount by which the corroded portion is removed because the corroded portion is removed by the cleaning process before the synthetic resin sheet is stuck. On the other hand, when a ring-shaped jig is used as in Patent Document 2, it is impossible to follow the change in the inner diameter dimension of the manhole related to the reconstruction work.
JP 2001-248177 A JP 2001-032309 A

  An object of the present invention is to provide a jig for reconstructing a sewerage facility capable of improving the construction efficiency, and a jig assembly using the jig.

  Another object of the present invention is to provide a jig for reconstructing a sewerage facility that is excellent in mechanical strength and lightweight, and a jig assembly using the jig.

  Still another object of the present invention is to provide a jig for reconstructing a sewerage facility that can realize cost reduction, and a jig assembly using the jig.

  The jig according to the present invention is used in reconstructing a sewerage facility in order to solve the above-described problems, and includes an inner frame portion and an outer plate portion. The inner frame portion has rigidity and includes a curved end edge, a non-curved end edge, and a connecting portion. The curved end edges are two sides facing in the height direction and are curved in an arc shape. The non-curved end edges are two sides facing in the width direction orthogonal to the height direction. The connecting portion is provided on one side of the non-curved end edge. The outer plate part is mainly composed of a synthetic resin material having elasticity, and is attached to the outer surface side of the inner frame part.

  A plurality of the jigs described above are combined to form a jig assembly. In the jig assembly according to the present invention, in a plurality of jigs, adjacent non-curved end edges are sequentially coupled by a connecting portion, and in a coupled state, the whole is cylindrical.

  As described above, in the jig according to the present invention, since the inner frame portion has rigidity, a jig excellent in mechanical strength and a jig assembly using the same can be provided.

  Since the outer plate portion is mainly composed of a synthetic resin material, for example, even if the inner frame portion is made of a metal material, the weight can be reduced by the amount of the outer plate portion.

  In the inner frame portion, the curved end edges are two sides facing in the height direction and are curved in an arc shape. The non-curved end edges are two sides facing in the width direction orthogonal to the height direction. According to this configuration, a cylindrical jig assembly can be easily configured by combining a plurality of jigs that are the same standard product and arranging the non-curved end edges adjacent to each other.

  Since the curved end edge constituting the inner frame portion is curved in an arc shape, the width dimension becomes small and the handling becomes easy. Therefore, construction efficiency can be improved.

  In addition, since a connecting portion is provided on one side of the non-curved end edge, a cylindrical jig assembly can be easily configured by connecting adjacent non-curved end edges with the connecting portion.

  In the jig constituting the jig assembly, the inner frame portion has rigidity, so that it can withstand wear and physical impact generated in the process of assembling and disassembling the jig assembly. Accordingly, the product life is extended and the cost is reduced.

  The outer plate portion has elasticity and is attached to the outer surface side of the inner frame portion. According to this configuration, the jig assembly has a structure in which the outer plate portion is disposed on the outer surface. Therefore, in the reconstruction work of sewerage facilities, it becomes possible to follow the change of the inner diameter of the manhole related to the reconstruction work within the range according to the elastic modulus of the outer plate part. Cost can be realized.

As described above, according to the present invention, the following effects can be obtained.
(1) A jig for reconstructing a sewerage facility capable of improving the construction efficiency and a jig assembly using the jig can be provided.
(2) It is possible to provide a jig for reconstructing a sewerage facility that is excellent in mechanical strength and lightweight, and a jig assembly using the jig.
(3) It is possible to provide a jig for reconstructing a sewerage facility that can realize cost reduction, and a jig assembly using the jig.

  Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

  FIG. 1 is a perspective view of a jig assembly according to an embodiment of the present invention. The jig assembly according to an embodiment of the present invention is used for reconstructing a sewerage facility, specifically, a manhole. The jig assembly in FIG. 1 has a cylindrical shape and is divided into five along the height direction (or axial direction) indicated by an arrow T, and five jigs for reconstruction work according to the number of divisions. Ingredient 10 is included. Of the five jigs 10, two jigs 10 adjacent to each other in the width direction (or circumferential direction) indicated by the arrow W are combined such that the sides 112 and 112 facing each other are separable.

  The jig assembly shown in FIG. 1 has, for example, a cylindrical outer diameter dimension OD1 of about 850 mm and an inner diameter dimension ID1 of about 650 mm. This dimension example assumes 900 mm which is the inner diameter dimension of the most popular manhole at present. According to this structure, a jig assembly can be erected inside a general manhole, and a space for an operator to enter and work inside the erected jig assembly can be secured. it can.

  As described above, the outer diameter dimension OD1 of the jig assembly is set so as to follow the inner diameter dimension of the manhole related to the reconstruction work. For example, when the jig assembly is arranged inside a so-called No. 2 manhole (inner diameter dimension 1200 mm), the outer diameter dimension OD1 is set to about 1150 mm. When the jig assembly is disposed inside a so-called No. 3 manhole (inner diameter dimension 1500 mm), the outer diameter dimension OD1 is set to about 1450 mm. The 50 mm diameter difference between the outer diameter dimension OD1 of the jig assembly and the inner diameter dimension of the manhole is used as a gap for arranging an anticorrosion sheet (not shown) and a back-filling material on the outer periphery of the jig assembly.

  Further, the jig assembly of FIG. 1 has a height dimension T1 along the height direction T of about 300 to 600 mm. The height T1 of the jig assembly can be appropriately set from the viewpoints of manhole volume and depth related to the reconstruction work, ease of handling such as carrying.

  FIG. 2 is a plan view of a reconstruction work jig according to an embodiment of the present invention, and FIG. 3 is a perspective view showing a simplified exploded structure of the jig of FIG. 4 is a perspective view showing a part of the jig of FIG. 2 in a cutaway view, FIG. 5 is a view of the jig of FIG. 4 viewed from the inside, and FIG. 6 is a cross section taken along line 6-6 of FIG. 7 and 7 are cross-sectional views taken along the line 7-7 in FIG. 2 to 7, the same reference numerals are given to the same components as those shown in FIG. 1.

  A specific structure of the jig 10 constituting the jig assembly of FIG. 1 will be described below with reference to FIGS. First, the jig 10 of FIG. 2 has a width dimension W10 along the width direction W of about 500 mm. The width dimension W10 of the jig 10 is deeply related to the work process of the manhole reconstruction work. For example, a circle C indicated by an alternate long and short dash line indicates a shape of a general manhole opening, and a diameter D210 of the most popular manhole opening is about 600 mm. Therefore, by making the width dimension W10 smaller than the diameter dimension D210, the jig 10 can be carried into the internal space from the opening of the manhole.

  The number of divisions of the jig assembly shown in FIG. 1 and the width dimension W10 of the jig 10 shown in FIG. 2 are determined following the difference in inner diameter between the opening of the manhole and the main body. That is, if the opening of the manhole is small, the jig 10 cannot be carried into the main body from the opening unless the width dimension W10 is reduced. On the other hand, since the inner diameter of the main body is normally enlarged with respect to the opening, the manhole is required to use a lot of jigs 10 in order to configure a jig assembly that follows the main body. The number of divisions of the jig assembly increases. Therefore, the number of divisions of the jig assembly in FIG. 1 is specifically set within a range in which the jig 10 can be carried from the manhole opening.

  The specific structure of the jig 10 will be described with reference to FIGS. 2 to 7 again. The jig 10 shown in FIGS. 2 to 7 includes an inner frame portion 11, a substrate portion 12, and an outer plate portion 13.

  The inner frame portion 11 has a rigid material as a main component, preferably a metal material as a main component. The metal material used for the inner frame portion 11 is preferably iron or the like from the viewpoints of rigidity, material cost, and moldability.

  The inner frame portion 11 has a horizontally long rectangular frame structure when viewed from the front, and includes a curved edge 111, a non-curved edge 112, a reinforcing portion 114, a first connecting portion 115, a second Connecting portion 116.

  The curved edge 111 is two sides facing in the height direction T, and is preferably formed of a thin plate and is curved in an arc shape. On the other hand, the non-curved end edge 112 is two sides facing the width direction W, and is preferably formed of a thin plate.

  The inner frame portion 11 has two curved surface areas defined by the curved edge 111 and the non-curved edge 112. That is, the inner frame portion 11 has a curved surface area that is enlarged on the outer surface side, and a curved surface area that is reduced on the inner surface side.

  Further, the inner frame portion 11 has an internal space defined by the curved edge 111 and the non-curved edge 112, and this internal space penetrates from the enlarged curved surface to the reduced curved surface. .

  The reinforcing portion 114 has a rod shape, and is disposed in an intermediate portion of the width dimension W10 of the curved edge 111 so as to be orthogonal to the curved edges 111 and 111 facing the height direction T, and both ends thereof are curved edges 111. , 111.

  The first and second connecting portions 115 and 116 are provided on the non-curved end edge 112. More specifically, the first connecting portion 115 is provided on one of the non-curved end edges 112 and is recessed in a concave shape along the width direction W on one end face of the non-curved end edge 112. On the other hand, the second connecting portion 116 is a so-called guide pin, and is provided on the other side of the non-curved end edge 112 facing the first connecting portion 115, and in the width direction on the other end face of the non-curved end edge 112. Protrusively projecting along W.

  The first and second connecting portions 115 and 116 are arranged at positions where one end surface and the other end surface of the non-curved end edge 112 overlap each other. Further, the first and second connecting portions 115 and 116 have a structure capable of engaging with each other, and when the plurality of jigs 10 are arranged adjacent to each other in the width direction W, the non-curved ends face each other. The edges 112 are detachably coupled to form a cylindrical jig assembly.

  The substrate portion 12 is a thin plate or sheet having a circular arc cross section, and is made of a fiber reinforced plastic (FRP = Fiber Reinforced Plastics) having a synthetic resin material as a main component, and more preferably having a thickness of about 5 mm. In this specification, “fiber reinforced plastic” means a plastic composite material having a fiber layer inside a plastic substrate. As an example, glass substrate reinforced plastics (GFRP = Glass fiber reinforced plastics), carbon fiber reinforced plastics (CFRP), or the like can be used as the substrate portion 12.

  The substrate portion 12 is attached to the outer surface side of the inner frame portion 11 and is preferably coupled to the inner frame portion 11. The coupling structure between the inner frame portion 11 and the substrate portion 12 can be realized by the FRP manufacturing process. In this type of FRP manufacturing process, a process of laying a fiber sheet on a mold apparatus along the curvature of the outer surface of the inner frame portion 11 and applying a plastic material as a base material to the fiber sheet is repeated a predetermined number of times. In the course of the FRP manufacturing process described above, the outer surface of the inner frame portion 11 is placed on a fiber sheet, and plastic is applied from above to embed the inner frame portion 11 in the substrate portion 12.

  Furthermore, the substrate part 12 of FIGS. 4 to 7 has an FRP reinforcing material 120. The FRP reinforcing material 120 is disposed along the coupling portion between the inner frame portion 11 and the substrate portion 12 on the inner surface side of the inner frame portion 11.

  With reference to FIGS. 2 to 7 again, the structure of the jig 10 will be described. The outer plate portion 13 is mainly composed of a synthetic resin material having volume elasticity, and is attached to the outer surface of the substrate portion 12. That is, the outer plate portion 13 is attached to the outer surface side of the inner plate portion 11 via the substrate portion 12. The outer plate portion 13 is a thin plate or sheet having an arc cross section, and preferably has an adhesive layer on the bonding surface with the substrate portion 12 and is attached to the substrate portion 12.

  The outer plate portion 13 is preferably mainly composed of foamed resin. In the present specification, the term “foamed resin” refers to a synthetic resin processed material obtained by absorbing a foaming agent (for example, hydrocarbon gas) in a particulate synthetic resin material and foaming it by applying high-temperature steam thereto. Means. Regarding the configuration of the foamed resin used in the jig 10, the type of the synthetic resin material and the specific composition such as the expansion ratio are the mechanical strength, volume elasticity, manufacturing cost, and easy processing required for the jig 10. It can be set as appropriate from the viewpoint of performance. As an example, as the jig 10, EPS (expanded polystyrene), EPP (expanded polypropylene), EPE (expanded Polyethylene), or the like can be used.

  As described with reference to FIGS. 1 to 7, the jig assembly according to an embodiment of the present invention includes five jigs 10 according to the number of divisions, and the five jigs 10 are adjacent to each other. The curved end edges 112 and 112 are sequentially coupled by concave and convex fitting by the first and second connecting portions 115 and 116, and in a coupled state, the curved end edges 112 and 112 have a cylindrical shape as a whole.

  Since the jig 10 shown in FIGS. 2 to 7 has an arc shape in cross section, it can be transported easily and efficiently in a non-bulky manner. Accordingly, the transportation cost can be reduced.

Since the jig 10 has a shape that is rich in mass productivity, the manufacturing cost can be reduced.
Since the inner frame part 11 which comprises the jig | tool 10 is frame shape, it can reduce in weight.

  Since the inner frame portion 11 has rigidity, it has excellent mechanical strength. As a result, it is possible to minimize deterioration over time due to wear and physical shock that occur during assembly and disassembly of the jig assembly. Accordingly, the product life is extended and the cost is reduced.

  Since the curved edge 111 constituting the inner frame portion 11 is curved in an arc shape, the width dimension W10 is reduced. Therefore, handling becomes easy and construction efficiency can be improved.

  Since the inner frame portion 11 has the non-curved edge 112 facing the width direction W, a plurality of jigs 10 that are the same standard product are combined and arranged so as to be adjacent to each other. Thus, a cylindrical jig assembly can be easily configured.

  Moreover, since the non-curved end edge 112 is provided with the first and second connecting portions 115 and 116, the adjacent non-curved end edges 112 and 112 are connected to the first and second connecting portions 115 and 116, respectively. A cylindrical jig assembly can be easily formed by the uneven coupling used.

  Further, the reinforcing portion 114 constituting the inner frame portion 11 is disposed in the middle portion of the width dimension of the curved edge 111 so as to be orthogonal to the curved edges 111 and 111 facing the height direction T, and both ends are curved ends. It is connected to the edges 111, 111. According to this structure, it is possible to avoid a problem that distortion or deformation occurs due to an external impact or pressure, thereby improving the mechanical strength of the inner frame portion 11.

  The jig 10 has a three-layer structure including an inner frame portion 11, a substrate portion 12, and an outer plate portion 13. Since the substrate portion 12 and the outer plate portion 13 are mainly made of a synthetic resin material, for example, even if the inner frame portion 11 is made of a metal material having a large specific gravity, the substrate portion 12 and the outer plate portion 13 are formed. Therefore, weight reduction can be realized.

  The substrate portion 12 is attached to the outer surface of the inner plate portion 11, and the outer plate portion 13 is attached to the outer surface of the substrate portion 12 of the substrate portion 12. According to this configuration, even if the inner frame portion 11 has a frame shape or a frame shape, the outer plate portion 13 can be surface-supported by the substrate portion 12. Furthermore, according to the structure in which the inner frame portion 11 and the substrate portion 12 are integrally coupled, the integrity of the three-layer structure of the inner frame portion 11, the substrate portion 12, and the outer plate portion 13 is improved. Therefore, it is to provide a jig 10 having excellent mechanical strength.

  The substrate unit 12 has an FRP reinforcing material 120. The FRP reinforcing material 120 is disposed along the coupling portion between the inner frame portion 11 and the substrate portion 12 on the inner surface side of the inner frame portion 11. According to this structure, since the mounting area of the substrate part 12 is ensured by the FRP reinforcing material 120, the substrate part 12 can be stably disposed with respect to the inner frame part 11.

  Moreover, when the mounting area of the board | substrate part 12 is ensured, when a pressing force is applied from the outer surface side of the inner frame part 11, this pressing force can be surface-supported by the FRP reinforcing material 120.

  In addition, the FRP reinforcing member 120 sandwiches the reinforcing portion 114 between the opposing surfaces of the substrate portion 12 in the portion of the reinforcing portion 114 constituting the inner frame portion 11 (see FIG. 6). According to this structure, the bonding strength between the inner frame portion 11 and the substrate portion 12 can be improved.

  Since the outer plate part 13 is mainly composed of a foamed resin, the outer plate part 13 has an excellent volume elasticity due to its foamed structure. Therefore, in the reconstruction work of the sewerage facility, it becomes possible to follow the change of the inner diameter dimension of the manhole related to the reconstruction work within the range corresponding to the volume elasticity of the outer plate part 13, Therefore, cost reduction can be realized.

  The outer plate portion 13 is lightweight because it is mainly composed of foamed resin. Therefore, construction efficiency can be improved. Further, since the outer plate portion 13 is mainly made of foamed resin, the material cost can be kept relatively low and can be easily processed with a heat cutter or the like. Therefore, the manufacturing cost can be reduced.

  FIG. 8 thru | or 18 is a figure which shows the process of the rebuilding construction of a sewer facility using the jig | tool which concerns on one Embodiment of this invention. The advantages of the jig 10 described with reference to FIGS. 1 to 7 and the jig assembly using the same will be described below along the construction process of the reconstruction work shown in FIGS. . In FIG. 8 to FIG. 18, the same components as those shown in FIG. 1 to FIG.

  First, the manhole 2 in FIG. 8 is a so-called assembly type, and the slant wall block 21, the straight wall block 22, and the bottom block 23 are connected in the height direction T. And an internal space 20 defined by the inner surface 200 of the manhole.

  The oblique wall block 21 has a lid 211 at the opening 210, and the lid 211 is exposed to the ground line GL. The bottom block 23 has a flow path 231 on the inner bottom surface 230, and an inflow pipe 61 and an outflow pipe 62 are connected to the flow path 231. The flow path 231 causes the sewage flowing from the inflow pipe 61 to flow down to the outflow pipe 62.

  The inner diameter of the internal space 20 is the smallest at the diameter D210 in the opening 210 of the inclined wall block 21, and the largest at the inner diameter D230 in the bottom block 23 or the like.

  In the step shown in FIG. 8, the corroded portion generated on the manhole inner surface 200 is removed by, for example, high-pressure water cleaning. The corroded portion has already been removed from the manhole in FIG. 8, and the manhole inner surface 200 has a concave and convex surface 201 after the corroded portion is removed. The uneven surface 201 may be reinforced by filling in advance with a repair agent such as epoxy resin or mortar.

  9 is a process after the process shown in FIG. 8, and the anticorrosion sheet 3 is carried into the internal space 20. It is preferable that the anticorrosion sheet 3 has a synthetic resin material having an anticorrosion effect as a main component and has flexibility. As the synthetic resin material used for the anticorrosion sheet 3, vinyl chloride resin (PVC), polypropylene (PP), fiber reinforced plastic (FRP = Fiber Reinforced Plastics), or the like can be used.

  The anticorrosion sheet 3 is preliminarily cut into a quadrangle having the inner circumferential length of the inner space 20 as the horizontal side 33 and the height dimension T23 of the bottom block 23 as the vertical side, and further the vertical side of the cut rectangular anticorrosion sheet 3 Are stacked and bonded to form an endless cylindrical shape. The outer diameter of the anticorrosion sheet 3 is preferably 850 mm when the manhole 2 is a so-called No. 1 manhole (inner diameter: 900 mm). According to this structure, a gap (G) of about 25 mm is generated between the outer surface 31 of the anticorrosion sheet 3 and the inner surface 200 of the manhole, and the gap (G) is formed in the backfill material (5). It can be used as a placement space.

  Furthermore, in order to carry the anticorrosion sheet 3 into the internal space 20, as shown in FIG. 10, the anticorrosion sheet 3 has an outer diameter D3 smaller than the diameter D210 (= 600 mm) of the opening 210, for example, In the middle portion, it is curved in a concave shape along the height direction T, and the outer diameter is reduced. By this bending operation, the outer diameter dimension D3 of the anticorrosion sheet 3 can be reduced to a diameter dimension D210 or less, and can be carried into the internal space 20 from the opening 210.

  The process of FIG. 11 is a process after the process shown in FIG. 9 and FIG. 10, and after carrying the reduced-diameter anticorrosion sheet 3 into the internal space 20, it follows the inner diameter dimension D 230 of the bottom block 23. Restore (expand diameter) into a cylindrical shape. The expanded anticorrosion sheet 3 is erected on the inner bottom surface 230 with the gap G from the manhole inner surface 200. Then, a predetermined number of jigs 10 are carried into the internal space 20 through the opening 210, and a plurality of jigs 10 are connected inside the anticorrosion sheet 3 to form a cylindrical jig assembly 1. . Regarding the connecting operation of the jig 10, the first connecting portion 115 of one jig 10 is guided to the second connecting portion 116 of the other jig 10, and the adjacent non-curved edge 112 is uneven. Mating.

  By sequentially repeating the above-described connecting operation, the endless cylindrical jig assembly 1 is constructed inside the endless cylindrical anticorrosion sheet 3 as shown in FIG. Is pushed from the inside to a state without wrinkles or slack. The jig assembly 1 is preferably erected on the inner bottom surface 230 of the bottom block 23 in a state where the outer surface thereof is crimped to the inner surface of the anticorrosion sheet 3.

  The process of FIG. 13 is a process after the process shown in FIGS. 11 and 12, and the backfilling material 5 is placed in the gap (G) between the manhole inner surface 200 and the outer surface (31) of the anticorrosion sheet 3. Fill. Although the mortar concrete, cement, etc. can be used for the backfill material 5, more preferably, fast-hardening concrete is used. By using fast-hardening concrete for the backfill material 5, the construction efficiency can be improved and the construction period can be shortened.

  As shown in FIG. 14, the backfill material 5 fills the gap G and the uneven surface 201. At this time, a pressing pressure (filling pressure) indicated by an arrow F is applied to the anticorrosion sheet 3 from the backfill material 5. The filling pressure F is supported by the jig assembly 1, so that deformation and distortion of the anticorrosion sheet 3 due to the filling pressure F, and further arrangement defects such as peeling are prevented.

  The anti-corrosion sheet 3 is affixed step by step for each of the manhole constituent blocks (21, 22, 23) from the viewpoint of avoiding the above-described arrangement failure and the viewpoint of construction efficiency. It is preferable to place the joint material 4 on the horizontal side 33 in the height direction T of the anticorrosion sheet 3.

  The process of FIG. 15 is a process after the process shown in FIGS. 13 and 14, and after the backfill material 5 filled in the bottom block 23 is cured, a new anticorrosion sheet 3 b and a treatment are obtained. The tool 10 is carried into the internal space 20 along the process described with reference to FIGS. The new anticorrosion sheet 3 b is arranged on the manhole inner surface 200 at a portion corresponding to the straight wall block 22 in a state of being continuously arranged on the anticorrosion sheet 3 (3 a) via the joint material 4.

  On the other hand, the newly loaded jig 10 is combined with the jig assembly 1a at a portion corresponding to the straight wall block 22 along the steps described with reference to FIGS. As shown in FIG. 16, the jig assembly 1 a is a jig assembly that is erected on the bottom block 23 in a state where the joints of the anticorrosion sheets 3 a and 3 b and the joint material 4 are avoided. It stands up on 1b. This is to avoid a problem that the backfill material (5) leaks from the joints of the anticorrosion sheets 3a and 3b and the joint material 4 due to the filling pressure F. The unevenness caused by the joint material 4 is elastically absorbed by the outer plate portion 13 constituting the outer surface of the jig assembly 1b.

  After the above arrangement work is completed, the filling process of the backfill material 5 with reference to FIGS. 13 and 14 is performed on the straight wall block 22.

  The process of FIG. 17 is a process after the process shown in FIGS. 15 and 16, and after the curing period of the backfill material 5 has elapsed, according to the reverse order of the carry-in process shown in FIGS. 11 and 12. The tool assembly (1a, 1b) is disassembled, and the disassembled jig 10 is carried out from the opening 210.

  After the step shown in FIG. 17, the anticorrosion sheet 3 is further affixed to the inclined wall block 21, and a synthetic resin-based sealing agent such as an epoxy resin is attached to the joint portion of the anticorrosion sheet 3 adjacent to the height direction T as necessary. 18 is applied (applied) to ensure airtightness against hydrogen sulfide gas and watertightness against sewage, thereby obtaining a reconstructed manhole shown in FIG.

  According to the sewerage facility restructuring method described with reference to FIGS. 8 to 18, all the advantages of the jig 10 described with reference to FIGS. 1 to 7 and the jig assembly 1 using the same are described. Can have. For example, since the jig assembly 1 has a connection structure using a plurality of jigs 10, the width dimension W <b> 10 of each jig 10 can be easily reduced from the opening 210 by keeping the width W <b> 10 smaller than the opening 210. And can be easily assembled in the internal space 20.

  Since the inner frame portion 11 constituting the jig 10 has rigidity, it can withstand the filling pressure F of the backfill material 5. Therefore, poor placement of the anticorrosion sheet 3 can be avoided.

  Since the inner frame portion 11 has rigidity, it is possible to minimize deterioration over time due to wear and physical impact generated during assembly work and disassembly work of the jig assembly 1. Accordingly, the product life is extended and the cost is reduced.

  Since the jig 10 is lightweight, the assembly operation and the disassembly operation of the jig assembly 1 can be performed easily and quickly. Specifically, the inner frame portion 11 constituting the jig 10 has a frame shape, and the substrate portion 12 and the outer plate portion 13 are mainly made of synthetic resin. Therefore, compared to a conventional iron jig, Significant weight reduction has been achieved. Therefore, handling such as carrying around at the construction site or assembling in the narrow manhole 2 becomes easy, thereby improving the construction efficiency.

  Since the curved edge 111 constituting the inner frame portion 11 is curved in an arc shape, it can be combined into a cylindrical shape along the manhole inner surface 200. On the other hand, since the non-curved end edge 112 constituting the inner frame portion 11 has the first and second connecting portions 115 and 116, the adjacent non-curved end edge 112 is connected to the first and second connecting portions. By joining with 115 and 116, the cylindrical jig | tool assembly 1 can be comprised easily. Therefore, the construction efficiency of the assembly work of the jig assembly 1 can be improved.

  Since the jig assembly 1 has a cylindrical shape, the jig assembly 1 can stand on the inner bottom surface 230 inside a general manhole 2. Therefore, the work of arranging the anticorrosion sheet 3 using the jig assembly 1 can be easily performed.

  Since the jig assembly 1 has a cylindrical shape, a working space is secured in which the worker enters the jig assembly 1 to work. Therefore, the arrangement work of the anticorrosion sheets 3a and 3b in the narrow manhole 2, the stacking work of the jig assemblies 1a and 1b, and the filling work of the backfill material 5 can be performed easily and quickly. .

  Moreover, since the inner frame portion 11 has rigidity, the thickness of the jig 10 is increased even when it is necessary to increase the height T10 of the jig 10 following the volume and depth of the manhole 2. There is no need to do this. Therefore, a sufficient working space can be secured inside the jig assembly 1.

  The outer plate part 13 is mainly composed of a synthetic resin material having elasticity, and is fixed to the outer peripheral side of the inner frame part 11. Since many of the concrete manholes related to reconstruction work are molded products, there is a molding tolerance for each product. In addition, there is a particular problem that the error in the inner diameter of the manhole is increased by the amount of removal of the corroded part by the cleaning process in the reconstruction work. On the other hand, the jig assembly 1 of the present invention can follow the error of the inner diameter dimension of the manhole 2 within a range corresponding to the volume elasticity of the outer plate portion 13. Therefore, improvement of construction efficiency and realization of cost reduction can be achieved.

Further, in this type of corroded manhole reconstruction work, the joint material 4 is used to attach a plurality of the anticorrosion sheets 3 together, so that the joints of the anticorrosion sheets 3 are uneven due to the joint material 4. Since the outer surface of the jig assembly 1b is constituted by the elastic outer plate portion 13, the unevenness caused by the joint material 4 is elastically absorbed,
Furthermore, the jig assembly 1 can be pressure-bonded to the anticorrosion sheet 3 by using the elasticity of the outer plate portion 13 that appears on the outer periphery thereof. For example, in this type of reconstruction work, the joint material 4 is used to join together the plurality of anticorrosion sheets 3a and 3b, so that the joints of the anticorrosion sheets 3a and 3b are uneven due to the joint material 4. On the other hand, since the outer surface of the jig assembly 1 is composed of the outer plate portion 13 having elasticity, it is possible to elastically absorb the unevenness caused by the joint material 4. Therefore, the construction yield is improved, thereby improving the reliability of the anticorrosion effect.

  Since the outer plate portion 13 is preferably composed mainly of a foamed resin, it can be easily molded by, for example, hot wire cutting using a heat cutter or the like. Therefore, the jig assembly 1 having various diameters can be prepared quickly and inexpensively, easily following the diameters of the sewerage facilities involved in the construction.

  The jig assembly 1 can easily adjust the diameter and the plan view shape by arbitrarily setting the number of combinations of the jigs 10. Therefore, according to the structure of the jig assembly 1 according to the present invention, it is possible to easily follow changes in the inner diameter and shape of the sewerage facility that is the construction target, and to quickly install the jig assembly 1. .

  19 is a plan view of a jig assembly according to another embodiment of the present invention, and FIG. 20 is a view of a part of the jig assembly of FIG. 19 as viewed from the inside. 21 is a plan view of the jig assembly shown in FIG. 19 with a part removed, FIG. 22 is a view of a part of the jig assembly shown in FIG. 21, and FIG. 23 is a plan view of FIG. It is the figure which looked at a part of tool assembly from the side. 19 to FIG. 23, the same reference numerals are given to the same components as those shown in FIG. 1 to FIG.

  The jig assembly 1 of FIGS. 19 to 23 is different from the embodiment of FIGS. 1 to 18 in that it has a structure capable of expanding and reducing the outer diameter dimension OD1 of the cylinder. Hereinafter, the difference will be mainly described. For convenience of explanation, one of the jigs constituting the expansion / contraction structure described above is a jig 10a and the other is a jig 10b.

  First, the jig 10a constituting the jig assembly 1 shown in FIGS. 19 to 23 is provided with a guide portion 14, a first support fitting 15, and a second support metal on one non-curved end edge 112a facing the width direction W. Support bracket 16.

  The guide part 14 has two rail-like parts 141 whose main component is a metal material, and has a gap between two adjacent rail-like parts 141. The guide portion 14 is disposed on the lower side of the end surface of the non-curved end edge 112a as viewed in the height direction T, and the two rail-shaped portions 141 are parallel to each other, so that the end surface of the non-curved end edge 112a Is extended along the height direction T.

  The first support fitting 15 has a plate shape and is provided on the lower side of the non-curved end edge 112a viewed in the height direction T. If it demonstrates in detail, the 1st support metal fitting 15 will protrude from the non-curved end edge 112a in the relationship of rising in the inner diameter direction, and has a notch 150 at the protruding portion. The notch 150 is open on the lower surface side of the protruding portion.

  The second support fitting 16 has a plate shape and is provided on the upper side of the non-curved edge 112a as viewed in the height direction T. The second support fitting 16 protrudes from the non-curved end edge 112a so as to rise in the inner diameter direction, and has a notch 160 at the protruding portion. The notch 160 opens to the upper surface side of the protruding portion.

  On the other hand, the jig 10b has a guide portion 14, a first support fitting 15, and a second support fitting 16 on the non-curved end edge 112b facing the non-curved end edge 112a with a gap in the width direction W. Have.

  The guide part 14 is arrange | positioned in the same height position in the non-curved edge 112a, 112b. The first and second support fittings 15 and 16 are arranged at the same height position on the non-curved end edges 112a and 112b. In other words, the first support fitting 15 is disposed at the same height position on the non-curved end edges 112a and 112b and has a bowl shape.

  Further, the jig assembly 1 shown in FIGS. 19 to 23 includes a wedge piece insertion space 70, a first wedge piece 71, a second wedge piece 72, a first tightening tool 73, and a second fastening tool 73. And a tightening tool 74.

  The wedge piece insertion space 70 is defined by a non-curved edge 112a and a non-curved edge 112b facing the non-curved edge 112a. The non-curved end edges 112a and 112b are inclined in a direction in which the distance between the opposing surfaces becomes smaller from the upper side to the lower side in the height direction T, and the wedge piece insertion space 70 is tapered. .

  The first wedge piece 71 is disposed below the wedge piece insertion space 70, and has a mounting portion 710 and a protrusion 711. The mounting portion 710 has a flat plate shape mainly composed of a metal material, rises from the inner surface of the first wedge piece 71 in the inner diameter direction, and has a slit 712 on the rising surface. The slit 712 penetrates the rising surface in the thickness direction, opens at the periphery of the rising surface, and extends in the inner diameter direction toward the inner surface of the first wedge piece 71 (see, for example, FIG. 25).

  The protrusions 711 are respectively provided on both side surfaces facing the width direction W in the first wedge piece 71, and the side surfaces extend along the height direction T. The protrusion 711 is fitted in the gap of the guide portion 14 and restricts the swinging of the first wedge piece 71 in the fitted state.

  The second wedge piece 72 is arranged above the wedge piece insertion space 70 and has a screw hole (720) on the inner surface. The first and second wedge pieces 71 and 72 are continuously arranged in the height direction T inside the wedge piece insertion space 70, and the outer diameter dimension OD1 is expanded in a state where the first and second wedge pieces 71 and 72 are arranged in the wedge piece insertion space 70. The outer diameter dimension OD1 is reduced in a state where the outer diameter dimension OD1 is removed from the wedge piece insertion space 70. That is, the first and second wedge pieces 71 and 72 are obtained by dividing the wedge body corresponding to the wedge piece insertion space 70 at the intermediate portion in the height direction T from the viewpoint of the efficiency and accuracy of assembly work. It has a structure.

  The first tightening tool 73 has a first fixing portion 731, a bolt 732, and a nut 733. The first fixing portion 731 has a plate shape and is fitted into the notch 150 of the first support fitting 15. In other words, the first fixing portion 731 is used as a so-called crossbar with respect to the first support fitting 15 arranged in a bowl shape.

  The bolt 732 is preferably a stud bolt and has one end protruding from the first fixing portion 731 and the other end of the first wedge piece 71 in a state of passing through the first fixing portion 731 in the height direction T. The mounting portion 710 is disposed.

  The nut 733 is attached to both ends of the bolt 732, one is attached to the lower side of the first fixing portion 731, and the other is attached to the upper side of the attachment portion 710 of the first wedge piece 71. According to this structure, the first tightening tool 73 uses the tightening force generated by tightening the bolt 732 and the nut 733, and uses the first fixing portion 731, the jigs 10 a, 10 b, and the first tightening tool 73. The wedge piece 71 can be integrally coupled.

  The second tightening tool 74 has a second fixing portion 741 and a handle portion 742. The second fixing portion 741 is fitted into the cutout portion 160 of the second support fitting 16. In other words, the second fixing portion 741 is used as a so-called crossbar with respect to the second support fitting 16 arranged in a bowl shape.

  The handle portion 742 has a bolt-like shaft portion, and the tip of the shaft portion is screwed into the screw hole 720 with the shaft portion passing through the second fixing portion 741. According to this structure, the second tightening tool 74 uses the tightening force generated by operating the handle portion 742 in the closing direction, and the second fixing portion 741, the jigs 10a, 10b, and the second The wedge pieces 72 can be joined together.

  24 to 27 are views showing a part of the assembling process of the jig assembly shown in FIGS. 24 to 27, the same components as those illustrated in FIGS. 1 to 23 are denoted by the same reference numerals.

  The advantages of the jig assembly 1 described with reference to FIGS. 19 to 23 will be described from the viewpoint of a more specific usage method.

  In the state shown in FIG. 24, the outer diameter dimension (OD1) of the jig assembly 1 can be reduced by the amount of the wedge piece insertion space 70. For example, in the jig assembly 1 divided into five, The eye (last) jig 10a or 10b can be arranged not by vertical insertion from the height direction T but by horizontal insertion from the width direction W. Then, as shown in FIG. 25, the first wedge piece 71 is inserted into the wedge piece insertion space 70 in a state where all the jigs 10 are arranged and configured in a substantially cylindrical shape. The first wedge piece 71 is guided to the wedge piece insertion space 70 in a state in which the protrusion 711 is guided in the gap of the guide portion 14 and the swinging and positional deviation are regulated by the guide portion 14. As the first wedge piece 71 is driven into the wedge piece insertion space 70, the non-curved end edges 112a and 112b are separated from each other.

  The process shown in FIG. 26 is a process after the process shown in FIGS. 24 and 25, and the first tightening tool 73 with the first wedge piece 71 guided to the wedge piece insertion space 70. The first wedge piece 71 is fixed to the wedge piece insertion space 70, and the outer diameter dimension (OD1) is expanded in the width direction W by the width dimension W71 of the first wedge piece. In a state where the first wedge piece 71 is fixed by the first tightening tool 73, the second wedge piece 72 is further guided to the wedge piece insertion space 70.

  The process shown in FIG. 27 is a process after the process shown in FIG. 26, and the second tightening tool 74 is tightened in a state where the second wedge piece 72 is guided to the wedge piece insertion space 70. That is, the wedge piece insertion space 70 is expanded in the width direction W by an amount corresponding to the width dimension W72 of the second wedge piece 72 and is fixed in an expanded state.

  As shown in FIGS. 24 to 27, the jig assembly 1 expands the outer diameter dimension OD1 in a state where the first and second wedge pieces 71 and 72 are driven into the wedge piece insertion space 70, Since the outer diameter OD1 can be reduced in the state of being taken out from the wedge piece insertion space 70, the efficiency of the assembling work and the disassembling work of the jig assembly 1 can be improved. For example, when the inner diameter dimension of the bottom block 23 described with reference to FIGS. 8 to 18 is about 900 mm, when attempting to construct the jig assembly 1 having an outer diameter dimension OD1 of 850 mm, When the jig 10 is inserted, it may become cramped.

  On the other hand, in this embodiment, a wedge piece insertion space 70 is provided in the jigs 10a and 10b to be coupled at the end of the assembly process, and the first and second wedge pieces 71 and 72 are driven into the outer diameter OD1. Can be expanded, a margin is provided in the space by the width dimensions W71, 72 of the first and second wedge pieces 71, 72. Therefore, the assembly operation of the jig assembly 1 can be performed efficiently. It is also clear that the disassembly work can be efficiently performed in the reverse order to the assembly work of the jig assembly 1.

  Furthermore, the outer diameter dimension OD1 of the jig assembly 1 can be expanded by the width dimension W71, 72 by driving in the first and second wedge pieces 71, 72. It is possible to finely adjust the property, and the reliability of the anticorrosion effect is improved.

  According to the configuration in which the guide portion 14 is disposed below the wedge piece insertion space 70, it is avoided that the tip portion directly contacts the non-curved edges 112a and 112b when the first wedge piece 71 is inserted. Therefore, it is possible to smoothly put in and out, and to avoid the risk of a damage accident due to contact between the two.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

It is a perspective view of the jig assembly concerning one embodiment of the present invention. It is a top view of the jig for reconstruction work concerning one embodiment of the present invention. It is a perspective view which simplifies and shows the decomposition | disassembly structure of the jig | tool of FIG. It is a perspective view which fractures | ruptures and shows a part of jig | tool of FIG. It is the figure which looked at the jig | tool of FIG. 4 from the inner side. FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. It is a fragmentary sectional view which abbreviate | omits one part and shows the process of the reconstruction construction of the sewerage facility using the jig | tool which concerns on one Embodiment of this invention. FIG. 9 is a diagram showing a step after the step shown in FIG. 8. It is a perspective view which abbreviate | omits and shows a part about the process shown in FIG. It is a figure which shows the process after the process shown in FIG.9 and FIG.10. It is a top view which abbreviate | omits and shows the state after the process shown in FIG. FIG. 13 is a diagram showing a step after the step shown in FIGS. 11 and 12. It is an enlarged view which abbreviate | omits and shows a part about the process shown in FIG. FIG. 15 is a diagram showing a step after the step shown in FIGS. 13 and 14. It is an enlarged view which abbreviate | omits and shows the process shown in FIG. FIG. 17 is a diagram showing a step after the step shown in FIGS. 15 and 16. It is a figure which shows the state after the process shown in FIG. It is a top view of the jig assembly concerning another embodiment of the present invention. It is the figure which looked at a part of jig assembly of Drawing 19 from the inside. FIG. 20 is a plan view of a state where a part of the jig assembly of FIG. 19 is removed. It is the figure which looked at a part of jig assembly of Drawing 21 from the inside. It is the figure which looked at a part of jig assembly of Drawing 21 from the side. It is a figure which abbreviate | omits and shows the assembly process of the jig | tool assembly which concerns on another embodiment of this invention. It is a figure which shows the state which looked at the process shown in FIG. 24 from the plane. FIG. 26 is a diagram showing a step after the step shown in FIGS. 24 and 25. FIG. 27 is a diagram showing a step after the step shown in FIG. 26.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Jig assembly 10 Jig 11 Inner frame part 111 Curved edge 112 Non-curved edge 115 First connection part 116 Second connection part 12 Substrate part 13 Outer plate part 70 Wedge piece insertion space 71, 72 First , Second wedge piece OD1 outer diameter dimension of jig assembly T height direction W width direction

Claims (5)

Reconstruction jig for sewer facilities, including an inner frame part and an outer plate part,
The inner frame portion has rigidity and includes a curved end edge, a non-curved end edge, and a connecting portion,
The curved edge is two sides facing in the height direction and is curved in an arc shape,
The non-curved edge is two sides facing the width direction orthogonal to the height direction,
The connecting portion is provided on one side of the non-curved end edge,
The outer plate part is mainly composed of a synthetic resin material having elasticity, and is attached to the outer surface side of the inner frame part.
Reconstruction jig. A jig for reconstructing a sewerage facility, including an inner frame portion, a substrate portion, and an outer plate portion,
The inner frame portion has rigidity and includes a curved end edge, a non-curved end edge, and a connecting portion,
The curved edge is two sides facing in the height direction, is curved in an arc shape,
The non-curved edge is two sides facing the width direction orthogonal to the height direction,
The connecting portion is provided on one side of the non-curved end edge,
The substrate part is mainly composed of a synthetic resin material, and is attached to the outer surface of the inner frame part,
The outer plate portion is mainly composed of a synthetic resin material having elasticity, and is attached to the outer surface of the substrate portion.
Reconstruction jig. Reconstruction work jig according to claim 1 or 2,
The outer plate portion has a foam resin as a main component,
Reconstruction jig. A jig assembly used in the reconstruction work of sewer facilities, including a plurality of reconstruction jigs,
The reconstruction work jig is the one described in any one of claims 1 to 3,
The plurality of jigs for reconstructing work, the adjacent non-curved end edges are sequentially coupled by the connecting portion, and are in a cylindrical shape as a whole in the coupled state.
Jig assembly. The jig assembly according to claim 4, further comprising a wedge piece insertion space and a wedge piece,
The wedge piece insertion space is defined by the adjacent non-curved edge;
The wedge piece is disposed inside the wedge piece insertion space, expands the radial dimension of the jig assembly, and is removed from the wedge piece insertion space, the diameter dimension is reduced.
Jig assembly.

Images