JP2008291462A - Temporary form member, temporary form assembly using the same, and reconstruction method for sewerage facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight and easy-to-handle temporary form member capable of reducing a manufacturing cost and a construction cost and enhancing construction efficiency; to provide a temporary form assembly using the temporary form member; and to provide a reconstruction method for sewerage facilities. <P>SOLUTION: This temporary form assembly 1 comprises the plurality of temporary form members 10. The temporary form member 10 includes a base body portion 100, and first and second connecting portions 15 and 16. The base body portion 100, which has at least one set of two opposed sides, is mainly composed of an expandable resin and formed like a plate. The first and second connecting portions 15 and 16, which have a step for projection-and-depression fitting, are provided on at least either of the two opposed sides of the base body portion 100. The plurality of temporary form members 10 are formed in a wholly tubular shape in such a manner that sides adjacent to each other are disassemblably connected together by the projection-and-depression fitting of the first and second connecting portions 15 and 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a temporary formwork member used for reconstructing a sewerage facility, a temporary formwork assembly using the same, and a method for reconstructing a sewerage facility.

  In general, a sewerage facility has a drainage pipe constituting a sewer network, a manhole for performing maintenance management of the sewer system, and these are organically connected. ing.

  By the way, since many of the manholes and drainage pipes that have already been laid are structures formed using a concrete material, the inner peripheral surface of the concrete base portion is caused by hydrogen sulfide gas generated from sewage. The problem is that corrosion deterioration occurs.

  Regarding the corrosion problem of the sewerage facilities mentioned above, if the corroded part generated on the inner peripheral surface of the concrete base part is left without repair, the corroded part is cracked by the earth pressure from the surroundings, and a water leakage accident occurs from this crack. However, in the worst case, it will develop into a crash.

  Therefore, many reconstruction techniques for repairing the corroded portion of the inner wall have been proposed for sewerage facilities. For example, in Patent Document 1, a flexible synthetic resin sheet (anticorrosion sheet) is carried into an internal space from a manhole opening in the form of a small cylinder, and the diameter of the anticorrosion sheet is expanded again in the internal space. And the manhole reconstruction technique stuck on the inner wall surface of a concrete base | substrate part is disclosed.

  However, when using the anticorrosion sheet as disclosed in Patent Document 1, it is necessary to use some kind of support device to press the anticorrosion sheet to the inner peripheral surface. As this type of support device, it is common to use a metal support device such as a pipe support or an iron temporary formwork. Moreover, in patent document 1, the structure which spreads toward the inner wall surface from the inner side of an anticorrosion sheet | seat is used by using a ring-shaped jig | tool as a support apparatus.

  Thus, according to the structure using a support apparatus, since the support apparatus itself is expensive, the cost will be increased accordingly. In addition, the cost is increased by an increase in the number of steps for attaching the support device.

  In addition, when a pipe support is used as the support device, there is a problem in that the internal space of the manhole is blocked by the pipe support, and the operator's work space is eliminated.

  On the other hand, when an iron temporary formwork is used as the support device, the iron temporary formwork is a heavy object, so that the work of assembling the formwork cannot be performed efficiently. Moreover, since the iron temporary formwork is expensive, it is expensive.

  As a technique for solving the problem of the supporting device in the reconstructing work described above, Patent Document 2 discloses a configuration in which the anticorrosion member is rigid and can itself stand on the inner bottom surface of the manhole. That is, in Patent Document 2, a plate-shaped anticorrosive member made of a synthetic resin material is connected to form a cylinder in the inner space of the manhole, and between this cylindrical outer peripheral surface and the inner peripheral surface of the concrete base portion. A reconstructing technique is disclosed in which a cylindrical anticorrosive member is attached to an inner peripheral surface by filling a backfill material.

  Certainly, according to the disclosure of Patent Document 2, it is not necessary to use a support device, and the above-described problem of the support device can be solved. On the other hand, according to the configuration in which a plurality of anticorrosion members are connected to form a cylinder, there is room for improvement in the cost required for the assembly work.

  In addition, in the disclosure of Patent Document 2, there is room for improvement in the followability to changes in the inner diameter dimension and shape of the manhole that is the construction target. That is, the cost of the mold used to manufacture this type of molded body is expensive. For example, when an anticorrosive member having a special inner diameter or shape that is infrequently used is required, the cost tends to increase. It is in.

  Furthermore, since the anticorrosion member of Patent Document 2 is a molded product, it cannot be denied that the production efficiency is reduced as compared with the anticorrosion sheet of Patent Document 1.

In addition, since the weight of the anticorrosion member of Patent Document 2 increases as compared with the anticorrosion sheet of Patent Document 1, it cannot be denied that the work efficiency is reduced.
JP 2001-032309 A JP-A-2005-273190

  The subject of this invention is providing the temporary formwork member which is lightweight and easy to handle, the temporary formwork assembly using the same, and the rebuilding method of a sewerage facility.

  Another object of the present invention is to provide a temporary formwork member capable of reducing manufacturing costs and construction costs, a temporary formwork assembly using the same, and a method for reconstructing a sewerage facility.

  Yet another object of the present invention is to provide a temporary formwork member capable of improving construction efficiency, a temporary formwork assembly using the same, and a method for reconstructing a sewerage facility.

  In order to solve the above-described problem, a temporary formwork member according to the present invention is used for reconstructing a sewerage facility, and includes a base portion and a connecting portion. The base portion has a plate shape mainly composed of a foamable resin, and has at least one set of two sides facing each other. The connecting portion has a step for fitting the concave and convex portions, and is provided on at least one of the two opposite sides of the base portion.

  As described above, since the base portion of the temporary formwork member according to the present invention is mainly composed of a foamable resin, it is lightweight and easy to handle. Furthermore, construction efficiency improves because the temporary formwork member is light and easy to handle.

  Since the base portion is mainly composed of a foamable resin, the material cost can be kept relatively low. Moreover, since it has a foamable resin as a main component, it can be easily molded with a heat cutter or the like. Therefore, the manufacturing cost can be reduced.

  Since the base portion has a foamable resin as a main component, the base portion has excellent buffering properties and mechanical strength (rigidity) due to the foamed structure. Moreover, since the base portion is plate-shaped, for example, the rigidity against external pressing force can be ensured by appropriately adjusting the plate thickness dimension at the time of cutting with the above-described heat cutter or the like.

  The connection part of the temporary formwork member has a step for fitting the concave and convex parts, and is provided on at least one of the two sides facing the base part. According to this configuration, a plurality of temporary formwork members that are the same standard product can be combined to form a cylinder. That is, the temporary formwork assembly according to the present invention is configured by using a plurality of temporary formwork members. Adjacent sides of the plurality of temporary formwork members are coupled so as to be disassembled by concavity and convexity of the connecting portion, and are formed into a cylindrical shape as a whole.

  As described above, since the temporary formwork assembly according to the present invention is configured using a plurality of temporary formwork members, it can have all the advantages of the temporary formwork members. For example, the temporary mold member is mainly made of a foamable resin and is lightweight, so that the temporary mold assembly is also light.

  Moreover, since the temporary formwork member has a foamable resin as a main component, the material cost is reduced. And since the temporary formwork member has foamable resin as a main component, it can be easily shape | molded by the hot wire cutting | disconnection using a heat cutter etc. Therefore, the manufacturing cost can be reduced.

  According to the above-described structure, each temporary mold member can be easily guided from, for example, a manhole opening, and after assembly of a plurality of temporary mold members into a cylindrical body, a large capacity is provided in the manhole internal space. The internal space can be formed.

  Since the base portion has a foamable resin as a main component, the base portion has excellent buffering properties and mechanical strength (rigidity) due to the foamed structure. In addition, since the base portion is plate-shaped, for example, the rigidity against the pressing force can be ensured by appropriately adjusting the plate thickness dimension at the time of hot wire cutting using a heat cutter or the like.

  Furthermore, the diameter of the cylinder can be easily adjusted by arbitrarily setting the number of temporary formwork members used and the number of combinations. Therefore, according to the structure of the temporary formwork assembly according to the present invention, it is possible to easily follow changes in the inner diameter size and shape of the sewerage facility to be constructed, and to quickly install the necessary temporary formwork assembly. .

  A method for reconstructing a sewerage facility according to the present invention is to carry a reduced-diameter cylindrical anticorrosion sheet and a plurality of temporary formwork members into an internal space of a concrete base portion, and the anticorrosion sheet is used as an inner wall surface in the internal space. The diameter of the tube is expanded along the cylinder, and a plurality of temporary formwork members are connected to each other by a connecting part inside the anticorrosion sheet to form a cylinder, and the inner wall of the concrete base part and the outer peripheral surface of the anticorrosion sheet are backfilled. A step of filling the material and disassembling the temporary formwork assembly after carrying out the curing period of the backfill material and carrying it out from the opening of the concrete base portion.

  As described above, since the method for reconstructing a sewerage facility according to the present invention has a cylindrical shape using a plurality of temporary formwork members, the temporary formwork member and the temporary formwork assembly Can have all the benefits. For example, since the base portion of the temporary formwork member is mainly composed of a foamable resin, the foamed structure has excellent buffering properties against external pressure and mechanical strength (rigidity). ing. In the sewerage facility restructuring method, the pressing force applied to the temporary formwork member and the temporary formwork assembly using the temporary formwork member is, for example, a filling pressure generated during the filling operation of the backfill material. Therefore, according to the reconstruction method according to the present invention, it is possible to counter the filling pressure of the backfilling material, and thus it is possible to prevent distortion and peeling of the anticorrosion sheet due to the filling pressure.

  Further, since the temporary formwork member is lightweight, the assembly work of the temporary formwork assembly can be performed easily and quickly.

  Furthermore, since the temporary formwork member is easy to mold, it is possible to quickly and inexpensively prepare temporary formwork assemblies having various diameters by following the diameters of the sewerage facilities involved in construction. it can.

  In the sewerage facility restructuring method according to the present invention, a plurality of temporary formwork members are connected to form a cylindrical shape. For example, a temporary formwork member is introduced into a manhole having a narrow opening portion, It can be assembled into a temporary formwork assembly in the internal space.

  And since the temporary formwork member is the cylinder shape in the state assembled in the internal space of a sewer facility, it can be made to stand on the internal bottom face of a manhole, for example. Therefore, the temporary formwork member can be introduced into the internal space of the anticorrosion sheet, and the work of supporting the anticorrosion sheet by the assembly using the temporary formwork member can be easily performed.

  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.

As described above, according to the present invention, the following effects can be obtained.
(1) A temporary formwork member that is lightweight and easy to handle, a temporary formwork assembly using the temporary formwork member, and a method for reconstructing a sewerage facility can be provided.
(2) It is possible to provide a temporary formwork member that can reduce manufacturing costs and construction costs, a temporary formwork assembly using the temporary formwork member, and a method for reconstructing a sewerage facility.
(3) The temporary formwork member which can improve construction efficiency, the temporary formwork assembly using the same, and the reconstruction method of a sewerage facility can be provided.

  FIG. 1 is a perspective view of a temporary formwork assembly according to an embodiment of the present invention. 2 is a plan view of the temporary formwork member constituting the temporary formwork assembly shown in FIG. 1, FIG. 3 is a front view of the temporary formwork member shown in FIG. 2, and FIG. 4 is a temporary form shown in FIG. It is a rear view of a formwork member.

  First, referring to FIG. 1, a temporary formwork assembly according to an embodiment of the present invention has a cylindrical structure divided into a plurality of parts along a height direction (or an axial direction) indicated by an arrow T. Five temporary formwork members 10 are included. The five temporary mold members 10 are coupled to each other in the temporary mold members 10 adjacent to each other in the width direction (or circumferential direction) indicated by the arrow W so that the sides facing each other can be disassembled by concave-convex fitting, and the cylindrical shape as a whole. It has become. Note that the shape of the temporary formwork assembly in plan view includes an elliptical shape (see FIG. 16 described later), a rectangular shape (see FIG. 17 described later), and a polygonal shape in addition to the substantially perfect circle shape shown in FIG. Can be taken.

  The temporary formwork assembly shown in FIG. 1 preferably has a cylindrical outer diameter dimension OD1 of about 850 mm and an inner diameter dimension ID1 of about 650 mm. This dimension example assumes an inner diameter dimension of 900 mm of the most popular manhole. According to this structure, a temporary formwork assembly can be disposed inside a general manhole, and a space for an operator to enter the temporary formwork assembly can be secured. The outer diameter dimension OD1 of the temporary formwork assembly can be set in advance in consideration of the specific inner diameter dimension of the manhole related to the reconstruction work. For example, when the temporary formwork assembly shown in FIG. 1 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, and the temporary formwork assembly is so-called No.3. When arranged inside a manhole (inner diameter dimension 1500 mm), the outer diameter dimension OD1 is set to about 1450 mm. The diameter difference of 50 mm is for securing an arrangement space (gap) for the anticorrosion sheet and the back-filling material to be described later on the entire outer periphery of the temporary formwork assembly.

  Next, a specific structure of the temporary formwork member 10 shown in FIG. 1 will be described with reference to FIGS. 2 to 4, the temporary mold member 10 includes a base portion 100, a first connecting portion 15, and a second connecting portion 16.

  The base part 100 has a foamable resin as a main component. In the present specification, the term “foamable resin” refers to a synthetic resinous process obtained by absorbing a foaming agent (for example, hydrocarbon gas) into a particulate synthetic resin material and applying high-temperature steam to the foamed resin. Means material. Regarding the configuration of the foamable resin used for the base portion 100, the type of synthetic resin material and the specific composition such as the expansion ratio are the mechanical strength required for the temporary formwork member 10, the manufacturing cost, and the ease of processing. It can be set as appropriate from the viewpoint of performance. As an example, EPS (expanded polystyrene), EPP (expanded polypropylene), EPE (expanded Polyethylene), or the like can be used as the base portion 100.

  Further, the specific shape of the base body 100 will be described. The base body 100 shown in FIGS. 2 to 4 is a plate having a circular arc shape as a whole, and the thickness D10 is about 100 mm. . The plate thickness dimension D10 of the base portion 100 can be appropriately set from the viewpoint of mechanical strength (rigidity) required for the temporary formwork member 10.

  Moreover, the base part 100 has a height dimension T10 along the height direction T of about 300 to 600 mm. The height dimension T10 of the base body 100 can be appropriately set from the viewpoints of specific construction conditions and construction efficiency.

  Furthermore, the base portion 100 has a width dimension W10 along the width direction W of about 500 mm. The width dimension W10 of the base body 100 is deeply related to the manhole reconstruction work. For example, a circle C indicated by an alternate long and short dash line in FIG. 2 indicates the shape of a general manhole opening, and the diameter D210 of the most popular manhole opening is about 600 mm. As shown in FIG. 2, the temporary mold member 10 has a width W10 of the base portion 100 smaller than a diameter D210 of a general manhole opening, whereby the temporary mold member 10 is removed from the manhole opening. , It can be carried into its internal space.

  The description will be given with reference to FIGS. 2 to 4 again. Base portion 100 includes one surface 11, another surface 12, curved end edge 13, and non-curved end edge 14. The one surface 11 is an outer diameter surface (a peripheral surface on the outer diameter side) expanded in the base portion 100 having an arc-shaped cross section, and the other surface 12 is an inner diameter surface (an inner diameter side) reduced in the base portion 100 having an arc-shaped cross section. ). The curved edge 13 is two sides facing each other at both ends in the height direction T, and the non-curved edge 14 is two sides facing each other at both ends in the width direction W orthogonal to the height direction T.

  The 1st and 2nd connection parts 15 and 16 have the level | step difference for uneven | corrugated fitting, and are provided in each of the non-curved edge 14. More specifically, the first connecting portion 15 has a step projecting in the width direction W on one end face of the non-curved end edge 14, and the step is formed in a strip shape along the height direction T. It has an extended convex edge. The second connecting portion 16 has a step that is recessed in the width direction W on the other end surface of the non-curved end edge 14, and this step is a groove that extends in a strip shape along the height direction T. .

  It is preferable that the steps of the first and second connecting portions 15 and 16 are set in advance to have dimensions and shapes that allow concavity and convexity fitting to each other. According to this configuration, a plurality of temporary mold members 10 that are the same standard product are prepared as necessary, and the first and second connecting portions 15 and 16 of the adjacent temporary mold members 10 are unevenly fitted to each other. Thus, since a cylindrical assembly can be constructed, the number of parts constituting the temporary formwork assembly can be substantially reduced, and the manufacturing cost can be reduced.

  In the structure of the temporary formwork member 10 and the temporary formwork assembly using the temporary formwork member 10 described with reference to FIGS. 1 to 4, the base portion 100 is mainly composed of a foamable resin. Compared with metal support devices such as molds and pipe supports, the weight can be significantly reduced. Accordingly, it is possible to provide the temporary formwork member 10 that can be easily handled during carrying or assembling.

  Since the base part 100 has a foamable resin as a main component, the material cost can be reduced as compared with a conventional iron temporary formwork or a metal support device such as a pipe support. Moreover, since it has a foamable resin as a main component, it can be easily molded by, for example, hot wire cutting using a heat cutter or the like. Therefore, the manufacturing cost can be reduced.

  The base portion 100 is a plate having an arc shape in cross section, and has a shape that is rich in mass productivity. Therefore, the manufacturing cost can be reduced and the base portion 100 can be easily transported without being bulky.

  Since the base portion 100 is mainly composed of a foamable resin, the base portion 100 has excellent buffering properties and mechanical strength (rigidity) due to its foamed structure. And since the base | substrate part 100 is plate shape, the rigidity with respect to a pressing force is securable by adjusting the board thickness dimension D10 suitably at the time of the hot wire cutting | disconnection using a heat cutter etc., for example.

Further, the temporary mold member 10 has first and second connecting portions 15 and 16. The first and second connecting portions 15, 16 have a step for fitting the concave and convex portions, and are provided on the non-curved end edges 14 of the base portion 100 facing each other. The plurality of temporary mold members 10 are each arranged in the width direction W, and the non-curved end edges 14-14 facing each other in the adjacent temporary mold members 10 are the first and second connecting portions 15, 16. A cylindrical temporary formwork assembly is formed by coupling by uneven fitting. According to this configuration, the temporary formwork assembly according to the embodiment of the present invention can have all the advantages of the temporary formwork member 10. For example, the base portion 100 of the temporary formwork member 10 is mainly composed of a foamable resin, and has excellent buffering properties against external pressure and mechanical strength (rigidity). The mold assembly also has excellent buffering properties against external pressure and mechanical strength (rigidity). The base part 100 of the temporary mold member 10 is mainly composed of a foamable resin. Since it is lightweight, the temporary formwork assembly is also light.

  The advantages of the temporary formwork member 10 described with reference to FIGS. 1 to 4 and the temporary formwork assembly using the temporary formwork member 10 will be further described from the viewpoint of the specific construction process of the reconstruction work. FIG. 5 thru | or FIG. 15 is a fragmentary sectional view which abbreviate | omits one part and shows about the reconstruction method of the sewerage facility which concerns on one Embodiment of this invention. 5 to 15, the same reference numerals are given to the same components as those shown in FIGS. 1 to 4.

  First, FIG. 5 is a partial cross-sectional view in which a part of a sewerage facility according to an embodiment of the present invention is omitted. In the sewerage facility shown in FIG. 5, the concrete base 2 includes a slant wall block 21, a straight wall block 22, and a bottom block 23 that constitute a so-called assembly-type manhole, which are connected in the height direction T. In this way, the inner peripheral surface 20 and the inner space 200 defined by the inner peripheral surface 20 are integrally formed.

  Further, the inclined wall block 21 has a lid 211 at the opening 210, and the lid 211 is exposed to the ground line 3. The bottom block 23 has a flow path 231 on the inner bottom surface 230, and an inflow pipe 41 and an outflow pipe 42 are connected to the flow path 231. The flow path 231 connects the inflow pipe 41 and the outflow pipe 42, and allows the sewage 5 to flow from the inflow pipe 41 to the outflow pipe 42.

  As shown in FIG. 5, when the concrete base portion 2 is a manhole, the passing dimension of the internal space 200 is minimized by the diameter dimension D210 in the opening 210 of the inclined wall block 21, and the straight wall block 22 and the bottom block The inner diameter dimension D200 in the block 23 is the maximum.

  Next, a specific restructuring process will be described. In the process shown in FIG. 5, the corroded portion generated on the inner peripheral surface 20 of the concrete base portion 2 is removed by, for example, high-pressure water cleaning. The inner peripheral surface 20 has already been removed from the corroded portion, and the portion after removing the corroded portion is an uneven surface 25. On the inner peripheral surface 20, the uneven surface 25 after removing the corroded portion may be reinforced by filling a repair agent such as epoxy resin or mortar in advance.

  The step shown in FIG. 6 is a step after the step shown in FIG. 5, and the anticorrosion sheet 6 is carried into the internal space 200. The anticorrosion sheet 6 is preferably composed mainly of a synthetic resin material having an anticorrosion effect and has flexibility. As the synthetic resin material used, vinyl chloride resin (PVC), polypropylene (PP), fiber reinforced plastics (FRP = Fiber Reinforced Plastics) and the like are preferable.

  The anticorrosion sheet 6 is previously cut into a quadrangle having the inner circumferential length of the internal space 200 as a horizontal side and the height dimension T23 of the bottom block 23 as a vertical side, and further the vertical side of the cut rectangular anticorrosion sheet 6 is formed. Laminate and bond to form an endless cylinder. The cylindrical anticorrosion sheet 6 preferably has an outer diameter dimension that is about 50 mm smaller than the inner diameter dimension D200 of the concrete base portion 2. For example, when the concrete base 2 is a so-called No. 1 manhole (inner diameter D200 = 900 mm), the outer diameter of the cylindrical anticorrosion sheet 6 used for this is 850 mm. According to this structure, an interval (G) of about 25 mm is generated between the outer peripheral surface (60) of the anticorrosion sheet 6 and the inner peripheral surface 20 due to a difference in diameter between the two, and this interval (G) is backfilling material. It can be used as a placement space for (7).

  Furthermore, a specific process of carrying the cylindrical anticorrosion sheet 6 into the internal space 200 of the manhole will be described with reference to FIG. A circle C indicated by a one-dot chain line in FIG. 7 indicates the shape of the opening 210 of the manhole, and the diameter D210 of the circle C (opening 210) is about 600 mm. The anticorrosion sheet 6 is formed, for example, at an intermediate portion so that the flexible anticorrosion sheet 6 processed into an endless cylindrical shape has an outer diameter smaller than the diameter D210 (= 600 mm) of the opening 210 of the manhole. A concave curve is formed in the inner circumferential direction along the direction T to reduce the overall outer diameter. By this bending operation, the anticorrosion sheet 6 whose outer diameter before bending is 850 mm can be reduced in diameter to a diameter D210 or less, and can be carried into the internal space 200 from the opening 210.

  The process shown in FIG. 8 is a process after the process shown in FIGS. 6 and 7, and the cylindrical anticorrosion sheet 6 having a reduced diameter in a curved state is brought into the internal space 200, and then the inner wall surface 20. The diameter is expanded (restored) into a cylindrical shape along the inner wall 20, and is arranged in the inner space 200 with a gap G from the inner wall surface 20. Next, a plurality of temporary mold members 10 are sequentially carried into the internal space 200 of the concrete base portion 2 through the openings 210, and the plurality of temporary mold members 10 are connected inside the anticorrosion sheet 6. Thus, a cylindrical temporary mold assembly is formed, and the anticorrosion sheet 6 is supported from the inside.

  Referring to FIG. 9 for the connecting process of the adjacent temporary form member 10, the first connecting part 15 of one temporary form member 10 is guided to the second connecting part 16 of the other temporary form member 10. Then, the concaves and convexes are fitted to each other. It is preferable that this uneven | corrugated fitting operation | work is performed by the horizontal insertion from the width direction (W) instead of the vertical insertion from a height direction (T) from a viewpoint of construction efficiency.

  By sequentially repeating the connecting step shown in FIG. 9, the endless cylindrical temporary formwork assembly 1 is constructed inside the endless cylindrical anticorrosion sheet 6 as shown in FIG. The temporary formwork assembly 1 is preferably erected on the inner bottom surface 230 of the bottom block 23 in a state where the outer peripheral surface (60) is crimped to the inner peripheral surface of the anticorrosion sheet 6.

  The process shown in FIG. 11 is a process after the process shown in FIGS. 8 to 10, and the backfilling material is provided in the gap G between the inner wall surface 20 of the concrete base portion 2 and the outer peripheral surface of the anticorrosion sheet 6. 7 is filled. Usually, mortar concrete, cement, or the like can be used for the backfill material 7, but a fast-hardening concrete is more preferably used. By using a fast-curing concrete for the backfill material 7, the construction efficiency can be improved and the construction period can be shortened.

  The backfill material 7 fills the uneven surface 25 of the inner peripheral surface 20 after removing the gap G and the corroded portion. At this time, the pressing force (filling pressure) F from the backfilling material 7 applied to the anticorrosion sheet 6 in the direction indicated by the arrow F is supported by the temporary mold assembly 1, and the anticorrosion sheet 6 due to the filling pressure F is supported. Is temporarily prevented by the temporary formwork assembly 1 (deformation, distortion, peeling, etc.).

  After the backfill material 7 filled in the bottom block 23 is cured, the temporary formwork assembly 1 is once disassembled and rearranged in a portion corresponding to the straight wall block 22 as shown in FIG. The steps referring to FIGS. 9 to 11 are repeated for the block 22.

  The process shown in FIG. 13 is a process after the process shown in FIG. 12, and after the curing period of the backfill material 7 has elapsed, according to the reverse order of the processes shown in FIGS. 1 is dismantled and carried out from the opening 210 of the concrete base 2.

  After the step shown in FIG. 13, an additional anticorrosion sheet 6 is further attached to the inner wall surface 20 of the inclined wall block 21, and an epoxy portion is applied to the overlap portion 61 of the anticorrosion sheet 6 adjacent in the height direction T. The reconstructed manhole shown in FIG. 14 and FIG. 15 is obtained by securing the airtightness against hydrogen sulfide gas and the watertightness against sewage by attaching (applying) a synthetic resin sealant 62 such as resin. .

  According to the sewerage facility reconstruction method described with reference to FIGS. 5 to 15, the advantages of the temporary formwork member 10 described with reference to FIGS. 1 to 4 and the temporary formwork assembly 1 using the temporary formwork member 1. Can all be included. For example, since the base part 100 of the temporary mold member 10 is mainly composed of a foamable resin, the foamed structure provides excellent cushioning against external pressing force F and mechanical strength (rigidity). have. In the sewerage facility restructuring method, the pressing force F applied to the temporary formwork member 10 and the temporary formwork assembly 1 using the temporary formwork member 10 is a filling pressure F generated during the filling operation of the backfill material 7. Therefore, according to the reconstruction method according to an embodiment of the present invention, the filling pressure F of the backfill material 7 can be counteracted, so that the anticorrosion sheet 6 is misplaced by the filling pressure F (deformation, distortion, and peeling). Etc.) can be prevented.

  Moreover, according to the reconstruction method of the sewerage facility which concerns on one Embodiment of this invention, since the temporary formwork assembly 10 is comprised by connecting the some temporary formwork members 10, each of the temporary formwork members 10 is previously set. For example, by making it smaller than the manhole opening 210, it is possible to easily carry in from the opening 210, and after assembling a plurality of temporary mold members 10 into a cylindrical body, a large capacity is provided in the manhole inner space 200. The internal space can be formed.

  Since the temporary mold member 10 is mainly made of a foamable resin and is lightweight, the assembly work of the temporary mold assembly 1 can be performed easily and quickly.

  Since the temporary formwork member 10 has a foamable resin as a main component, it can be easily molded by, for example, hot wire cutting using a heat cutter or the like. Therefore, the temporary formwork assembly 1 having various diameters can be prepared quickly and inexpensively by easily following the diameters of the sewerage facilities involved in the construction.

  The temporary formwork assembly 1 can easily adjust the diameter and the plan view shape of the temporary formwork assembly 1 by arbitrarily setting the number of temporary formwork members 10 used and the number of combinations of the temporary formwork members 10. . Therefore, according to the structure of the temporary formwork assembly 1 according to the present invention, it is possible to easily follow changes in the inner diameter size and shape of the sewerage facility to be constructed, and to install the temporary formwork assembly 1 quickly. .

  Furthermore, since the temporary formwork member 10 is cylindrical in a state assembled to the temporary formwork assembly 1 in the internal space 200 of the sewerage facility, the temporary formwork assembly 1 can be made to stand on the inner bottom surface 230, for example. Therefore, the work of supporting and fixing the anticorrosion sheet 6 by the temporary mold assembly 1 in the internal space 200 of the anticorrosion sheet 6 can be easily performed.

  16 and 17 are plan views of a temporary formwork assembly 1 according to another embodiment of the present invention. 16 and 17, the same reference numerals are given to the same components as those shown in FIGS. 1 to 15.

  First, the temporary formwork assembly 1 shown in FIG. 16 is different from the embodiment shown in FIGS. 1 to 15 in that the shape of the temporary formwork assembly 1 is elliptical, and secondly, The temporary formwork assembly 1 is characterized in that the number of divisions along the height direction (or the axial direction) T is increased to have a six-division structure in order to realize the elliptical shape.

  Regarding the first difference that the shape of the temporary formwork assembly 1 in plan view is elliptical, the shape of the shape of the temporary formwork assembly 1 in plan view is essentially a cross section of the internal space (200) of the sewerage facility to be reconstructed. Determined by shape. For example, as described with reference to FIGS. 1 to 15, the temporary formwork assembly 1 is used to support the anticorrosion sheet (6), and the anticorrosion sheet (6) is flexible. Is arranged following the inner wall surface (20) of the manhole. The temporary formwork assembly 1 shown in FIG. 16 is an assembly used when the cross-sectional shape of the internal space (200) of the sewerage facility related to the reconstruction work is an elliptical shape, and the anticorrosion sheet (6) also follows this. One embodiment is disclosed.

  Further, regarding the second difference in which the temporary mold assembly 1 has a six-divided structure in which the number of divisions along the height direction (or the axial direction) T is increased in order to realize the ellipse, FIG. The temporary formwork assembly 1 shown in FIG. 1 is based on the diameter of the cylinder, with the temporary formwork member 10 having an arc-shaped cross section shown in FIGS. 1 to 15 and the cylindrical formwork formwork assembly 1 using these as a base. In addition, by adding and combining the temporary mold member 10 having a flat cross-sectional shape to the half-divided portion, the cylindrical shape is stretched in a predetermined direction. Note that the temporary mold member 10 having a flat cross-sectional shape has substantially the same basic configuration as the temporary mold member 10 having an arc-shaped cross section shown in FIGS.

  As described above, according to the structure of the embodiment shown in FIG. 16, the temporary mold assembly can be obtained by appropriately combining the temporary mold member 10 having a circular arc cross section and the temporary mold member 10 having a flat cross section. It is possible to ensure the shape of the plan view of 1 and the variation (diversity) of the number of divisions, thereby improving the construction efficiency. The temporary formwork assembly 1 shown in FIG. 16 has all the structural features of the temporary formwork member 10 described with reference to FIGS. 1 to 15 and a sewerage facility using the temporary formwork member 10. Obviously, it can also have all the advantages.

  Next, the temporary mold assembly 1 shown in FIG. 17 is different from the temporary mold assembly 1 shown in FIGS. 1 to 16, and the base portion 100 of the temporary mold member 10 has an L shape in plan view. There is a feature in that it has first and second surface portions orthogonal to each other and a combination of a plurality of temporary formwork members 10 in a rectangular tube shape. The temporary mold member 10 shown in FIG. 17 has substantially the same basic configuration as the temporary mold member 10 having an arcuate cross section shown in FIGS.

  In the first place, the specific division structure (number of divisions) of the temporary formwork assembly 1 is determined by the difference in diameter between the manhole opening 210 and the internal space. For example, if the difference in diameter between the two becomes large, the temporary mold member 10 cannot be carried in from the opening 210 unless the width of the temporary mold member 10 is reduced. If the width of the temporary mold member 10 becomes small, the temporary mold member 10 becomes temporarily installed. It is obvious that the number of divisions of the mold assembly 1 increases. Therefore, the temporary mold assembly 1 has a specific division structure (number of divisions) within a range in which the temporary mold member 10 can be easily carried in from the manhole opening 210.

  The temporary formwork assembly 1 shown in FIG. 17 is an embodiment showing the plan view shape of the temporary formwork assembly 1 described with reference to FIG. 16 and the variation (diversity) of the number of divisions. Since it has all the structural features of the temporary formwork member 10 described with reference to FIG. 16 and the sewerage facility using the same, it is obvious that all the advantages can be obtained.

  18 is a plan view of a temporary formwork assembly 1 according to still another embodiment of the present invention, and FIG. 19 is a front sectional view of the temporary formwork assembly 1 shown in FIG. 18 and 19, the same reference numerals are given to the same components as those shown in FIGS.

  The temporary formwork assembly 1 shown in FIGS. 18 and 19 has a structure that can adjust the outer diameter OD1 of the temporary formwork assembly shown in FIGS. 1 to 17, thereby improving the efficiency of assembly work. One feature is that the adhesion to the anticorrosion sheet 6 is improved. That is, in the temporary mold assembly 1 shown in FIGS. 18 and 19, at least one of the plurality of temporary mold members 10 has a cylindrical diameter expanding portion 19.

  More specifically, the temporary mold member 10 having the cylindrical diameter expanding portion 19 includes a first base portion 101, a second base portion 102, a first connecting portion 15, and a second connecting portion 16. And the cylinder diameter expansion part 19.

  The first base portion 101 is a plate having a cross-sectional arc shape mainly composed of a foamable resin, and includes a first surface 11, a second surface 12, a curved edge 13, and a non-curved edge 14. The one curved edge 13 is two sides facing each other at both ends in the height direction T of the base portion 100, and the non-curved edge 14 is two sides facing each other at both ends in the width direction W orthogonal to the height direction T.

  The first base portion 101 has a first connecting portion 15 on one of the non-curved end edges 14. The first connecting portion 15 has a step protruding in a convex shape in the width direction W, and the step is a convex edge extending in a strip shape along the height direction T.

  The second base portion 102 is a plate having a cross-sectional arc shape mainly composed of a foamable resin, and includes one surface 11, another surface 12, a curved edge 13, and a non-curved edge 14. The one curved edge 13 is two sides facing each other at both ends in the height direction T of the base portion 100, and the non-curved edge 14 is two sides facing each other at both ends in the width direction W orthogonal to the height direction T.

  The second base portion 102 has a second connecting portion 16 on the other side of the non-curved end edge 14. The second connecting portion 16 has a step that is recessed in the width direction W, and the step is a groove that extends in a strip shape along the height direction T.

  The cylinder diameter expanding portion 19 has a groove portion 191 and a wedge piece 192. The wedge piece 192 is preferably cut out from the temporary formwork member 10 and has a wedge shape that tapers from the other surface 12 to the one surface 11 when viewed from above, and has a height. It extends in a columnar shape along the direction T. The wedge piece 192 expands the diameter of the cylindrical body when driven into the groove 191 and reduces the diameter of the cylindrical body when removed from the groove 191.

  The groove portion 191 is provided along the height direction T. The groove portion 191 corresponds to, for example, a space portion after the wedge piece 192 is cut out from the temporary mold member 10, and the other end surface of the non-curved edge 14 of the first base portion 101 and the second base body. It is comprised by the one end surface of the non-curved edge 14 of the part 102, and is extended along the height direction T. As shown in FIG.

  The advantages of the temporary formwork assembly 1 described with reference to FIGS. 18 and 19 will be described from the viewpoint of a more specific usage method. 20 and 21 are partial cross-sectional views illustrating a method of joining the temporary mold assembly shown in FIGS. 18 and 19 with a part thereof omitted. 20 and 21, the same components as those shown in FIGS. 1 and 19 are denoted by the same reference numerals.

  FIG. 20 shows a state before the wedge piece 192 is driven into the groove 191. In the state shown in FIG. 18, the temporary mold assembly 1 has the outer diameter dimension (OD1) reduced by the amount of the wedge piece 192. Therefore, for example, in the temporary mold assembly 1 divided into five, When the first (final) temporary formwork member 10 is concavo-convexly fitted between the temporary formwork members 10 erected first, the vertical direction from the height direction (T) is not used, but the width direction (W ) From the horizontal insertion. Therefore, the connection process of the temporary formwork member 10 shown in FIGS. 8 and 10 is facilitated.

  The process shown in FIG. 21 is a process after the process shown in FIG. 18, and as the wedge piece 192 is driven into the groove part 191, the end face of the groove part 191 that faces is separated and the outer diameter dimension (OD1) is The wedge piece 192 is expanded in the width direction indicated by the arrow by the width dimension D192.

  As shown in FIGS. 18 and 21, the temporary mold assembly 1 includes a cylindrical diameter expanding portion 19 in at least one of the plurality of temporary mold members 10. The cylindrical diameter expanding portion 19 has a groove portion 191 and a wedge piece 192. The wedge piece 192 is taken out from the groove portion 191 by expanding the outer diameter dimension (OD1) while being driven into the groove portion 191. According to the structure capable of reducing the outer diameter dimension (OD1) in the state, the advantages of the temporary formwork member 10 described with reference to FIGS. 1 to 17 and the temporary formwork assembly 1 using the temporary formwork assembly 1 are obtained. All can have.

  Furthermore, according to the structure described with reference to FIG. 18 and FIG. 21, by having a structure that can adjust the outer diameter dimension (OD1), the efficiency of the assembly work is improved and the adhesion to the anticorrosion sheet 6 is improved. be able to. For example, in the connecting step of the temporary mold member 10 shown in FIGS. 9 and 11, when the inner diameter D200 of the inner space 200 is 900 mm, the assembly 1 having an outer diameter (OD1) of 850 mm is constructed in the manhole. In this case, when the last temporary formwork member 10 is inserted, it may become cramped. With respect to this problem, in the present embodiment, it is possible to extend the outer diameter dimension (OD1) by providing a groove 191 in the temporary mold member 10 to be coupled at the end of the assembly process and driving a wedge piece 192. Therefore, a margin is created in the space by the width dimension D192 of the wedge piece 192. Therefore, the assembly work of the assembly 1 can be performed efficiently.

  Furthermore, since the outer diameter dimension (OD1) of the assembly 1 can be expanded by the width dimension D192 by driving in the wedge piece 192, the adhesion to the anticorrosion sheet 6 is improved, and the support apparatus is provided. Reliability is improved.

  FIG. 22 is a front sectional view of a temporary formwork assembly 1 according to still another embodiment of the present invention. FIG. 23 is a partial cross-sectional view showing a part of the joining method of the temporary mold assembly 1 shown in FIG. 22 with a part omitted, and FIG. 24 is a partial cross-sectional view showing a state after the process shown in FIG. . 22 to 24, the same components as those shown in FIGS. 1 to 21 are denoted by the same reference numerals.

  The cylindrical diameter expanding portion 19 of the temporary formwork assembly 1 shown in FIGS. 22 to 24 is such that the wedge piece (main wedge piece) 192 shown in FIGS. 18 to 21 is halved in the height direction T, and The main wedge piece 192 is characterized in that a plurality of sub-wedge pieces 193 are arranged at intervals in the height direction T at the half-split interface. That is, the temporary mold assembly 1 shown in FIGS. 22 to 24 is an embodiment in which the function of adjusting the outer diameter (OD1) by the cylindrical diameter expanding portion 19 shown in FIGS. 18 to 21 is further improved. is there. Hereinafter, the description will be given focusing on the cylindrical diameter expanding portion 19.

  First, referring to FIG. 22, the cylinder diameter extending portion 19 has a groove portion 191, a main wedge piece 192, and a sub main wedge piece 193. The main wedge piece 192 has the same basic structure as the wedge piece 192 shown in FIGS. 18 to 21 except that the main wedge piece 192 is divided into two at the central portion of the wedge shape when seen in a plan view.

  The sub main wedge piece 193 has a wedge shape that tapers from the other surface 12 toward the one surface 11 when viewed from the top. The plurality of sub-wedge pieces 193 are arranged at intervals in the height direction T along the half interface of the main wedge piece 192. The sub-wedge piece 193 expands the outer diameter dimension (OD1) in a state where it is driven into the half interface of the main wedge piece 192, and the outer diameter dimension (OD1) when it is taken out from the half interface of the main wedge piece 192. OD1) is reduced. The advantage of using a plurality of sub-wedge pieces 193 is that the number of installations and installation locations can be adjusted as necessary from the viewpoint of construction efficiency. The sub main wedge piece 193 may have a structure extending in a column shape along the height direction T like the main wedge piece 192.

  The advantages of the temporary formwork assembly 1 described with reference to FIG. 22 will be described from the viewpoint of a more specific usage method. 23 and 24 are partial cross-sectional views showing a method of joining the temporary formwork assembly shown in FIG. 22 with a part thereof omitted. 23 and 24, the same reference numerals are given to the same components as those shown in FIGS.

  FIG. 23 shows a state before the auxiliary wedge piece 193 is driven into the half-split interface of the main wedge piece 192. In the state shown in FIG. 23, the main wedge piece 192 has already been driven into the groove portion 191, and the outer diameter dimension (OD1) is expanded by the amount of the main wedge piece 192. The sub-wedge piece 193 is driven into the half interface of the main wedge piece 192 when it is desired to further adjust the outer diameter dimension (OD1) from the state shown in FIG. Here, the main wedge piece 192 shown in FIG. 21 preferably has a notch 194 in advance on the inner diameter side of the interface. According to the configuration in which the main wedge piece 192 has the notch 194, the positional deviation when the auxiliary wedge piece 193 is driven into the interface can be prevented by the notch 194, and can be smoothly guided to the inside of the interface.

  The process shown in FIG. 24 is a process after the process shown in FIG. 23, and as the sub wedge piece 193 is driven into the half interface of the main wedge piece 192, the interface is separated. The width dimension D192 of the main wedge piece 192 shown in 21 is further expanded in the width direction indicated by the arrow by the amount of the auxiliary wedge piece 193. In the state shown in FIG. 24, the outer diameter dimension (OD1) is expanded by the width dimension D193 by the combination of the main wedge piece 192 and the sub wedge piece 193 (D192 <D193).

  The temporary formwork assembly 1 shown in FIGS. 22 to 24 has all the advantages of the temporary formwork member 10 described with reference to FIGS. 1 to 21 and the temporary formwork assembly 1 using the same. it can.

  Furthermore, according to the structure described with reference to FIG. 22 to FIG. 24, the outer diameter dimension (OD1) is expanded beyond the width dimension D192 of the main wedge piece 192 by driving the auxiliary wedge piece 193 into the main wedge piece 192. can do. Therefore, the adhesiveness with respect to the anticorrosion sheet 6 improves, and the reliability as a support apparatus improves.

  The structure shown in FIGS. 22 to 24 also has all the structural features of the temporary formwork member 10 described with reference to FIGS. It is self-evident that all of

  FIG. 25 is a perspective view of a temporary formwork assembly 1 according to still another embodiment of the present invention. In FIG. 25, the same components as those shown in FIGS. 1 to 24 are denoted by the same reference numerals.

  The temporary formwork assembly 1 shown in FIG. 25 is characterized in that it has third and fourth connecting portions 17 and 18 on each of the curved end edges 13.

  The 3rd and 4th connection parts 17 and 18 have the level | step difference for uneven | corrugated fitting, and are provided in each of the curved edge 13. FIG. More specifically, the third connecting portion 17 is a step protruding in a convex shape on one end face of the curved end edge 13, and is a convex edge extending in a strip shape along the width direction W. The fourth connecting portion 18 is a step that is recessed in the other end surface of the curved end edge 13, and is a concave groove that extends in a strip shape along the width direction W. The steps of the third and fourth connecting portions 17 and 18 are previously steps corresponding to the concave-convex fitting.

  According to the configuration in which the third and fourth connecting portions 17 and 18 that can be concavo-convexly fitted are arranged on each of two opposing sides of the temporary formwork member 10, a plurality of temporary formwork assemblies 1 that are the same standard product are arranged. In the case of stacking in the height direction T, the third and fourth connecting portions 17 and 18 facing each other can be continuously engaged with each other in the adjacent temporary mold member 10. Therefore, the number of parts constituting the temporary formwork assembly 1 can be substantially reduced, and the manufacturing cost can be reduced.

  The advantages of the temporary formwork member 10 described with reference to FIG. 25 will be described from the viewpoint of a more specific method of use (reconstruction work) with reference to FIGS. FIG. 26 is a partial cross-sectional view showing a method for reconstructing a sewerage facility according to another embodiment of the present invention with a part thereof omitted. 26 to 29, the same components as those shown in FIGS. 1 to 25 are denoted by the same reference numerals.

  The sewerage facility shown in FIG. 26 is a so-called assembly-type manhole and includes the concrete base portion 2. The concrete base portion 2 has a connecting structure of a slanted wall block 21, a straight wall block 22, and a bottom block 23 constituting each part of the assembly type manhole, and is an integrated internal space defined by the inner peripheral surface 20. 200.

  In the process shown in FIG. 26, the anticorrosion sheet 6 is carried into the internal space 200. The concrete base part 2 removes the corroded part which arose on the internal peripheral surface 20 previously, for example by high pressure water washing | cleaning. The inner peripheral surface 20 has already been removed from the corroded portion, and the portion after removing the corroded portion is an uneven surface 25.

  When the anticorrosion sheet 6 is carried into the internal space 200, the inner circumferential length of the internal space 200 is set as a lateral side in advance, and the height dimension T23 of the bottom block 23 and the height dimension T22 of the straight wall block 22 are added ( The height dimension T22 + T23) is cut into a rectangular shape having a vertical side, and the cut anticorrosion sheet 6 is formed into a cylindrical shape having a smaller diameter than the diameter dimension D210 of the opening 210 of the manhole. Then, it is carried into the internal space 200.

  The process shown in FIG. 27 is a process after the process shown in FIG. 26, and the cylindrical anticorrosive sheet 6 having a reduced diameter is expanded into a cylindrical shape along the inner wall surface 20 after being carried into the internal space 200. Further, it is arranged in the internal space 200 with a gap G from the inner wall surface 20. In the cylindrical anticorrosion sheet 6, a synthetic resin sealant such as an epoxy resin is preferably applied to a portion where the edges overlap, so that the anticorrosion sheet 6 has an endless cylindrical shape. Thereby, the airtightness with respect to hydrogen sulfide gas and the watertightness with respect to sewage can be ensured.

  Further, a plurality of temporary mold members 10 are sequentially carried into the internal space 200 of the concrete base portion 2 through the openings 210, and a plurality of temporary mold members are formed inside the cylindrical anticorrosion sheet 6. 10 is connected, the cylindrical temporary formwork assembly is comprised, and the anticorrosion sheet | seat 6 is supported from an inner side.

  Referring to FIG. 28 for the connecting process of the temporary mold member 10 adjacent to the height direction T, the third connecting portion 17 of one temporary mold member 10 is connected to the fourth temporary mold member 10 facing the fourth. Guided to the connecting portion 18, the concave and convex portions are engaged with each other. It is preferable that this uneven | corrugated fitting operation | work is performed not by the insertion from the height direction T but by the insertion from the width direction W from a viewpoint of construction efficiency. By further repeating the connecting step shown in FIG. 28, the endless cylindrical temporary formwork assembly 1 is constructed inside the cylindrical anticorrosion sheet 6 as shown in FIG. This temporary formwork assembly 1 is erected on the inner bottom surface 230 of the bottom block 23.

  Further, the backfilling material 7 is filled in the gap G between the inner wall surface 20 of the concrete base portion 2 and the outer peripheral surface of the cylindrical anticorrosion sheet 6, and the inner wall surface 20 of the concrete base portion 2 and the cylindrical shape are filled. A back-filling material 7 is filled between the outer peripheral surface of the anticorrosion sheet 6 that has become.

  The backfill material 7 fills the uneven surface 25 of the inner peripheral surface 20 after removing the gap G and the corroded portion. At this time, the pressing force (filling pressure) F from the backfill material 7 applied to the anticorrosion sheet 6 in the direction indicated by the arrow F is supported by the temporary formwork assembly 1. After the curing period of the backfill material 7 has elapsed, the temporary mold assembly 1 is disassembled and carried out from the opening 210 of the concrete base 2 in accordance with the reverse order of the steps shown in FIGS.

  According to the sewerage facility restructuring method described with reference to FIGS. 26 to 29, the temporary formwork member 10 described with reference to FIGS. 1 to 4 and the advantages of the temporary formwork assembly 1 using the same. Can all be included.

  Furthermore, since the anticorrosion sheet 6 can be affixed to the bottom block 23 and the straight wall block 22 in one step, the construction efficiency can be improved and the construction period can be shortened.

  Moreover, the airtightness with respect to hydrogen sulfide gas and the watertightness with respect to sewage are improved because at least the portion where the end edges of the anticorrosion sheets 6 adjacent in the vertical direction overlap is eliminated.

  FIG. 30 is a partial cross-sectional view illustrating a method for reconstructing a sewerage facility according to another embodiment of the present invention with a part thereof omitted. In FIG. 30, the same components as those shown in FIGS. 1 to 29 are denoted by the same reference numerals.

  In the restructuring process shown in FIG. 30, the sewerage facility is a drain pipe 41 or 42 (see FIG. 29, etc.) that constitutes the sewerage facility together with manholes, and includes a plurality of temporary formwork assemblies 1, anticorrosion sheets 6, concrete The base part 2 and the backfill material 7 are included.

  The plurality of temporary formwork assemblies 1 are assembled in a shape (tubular or tubular) along the anticorrosion sheet 6 in the internal space 200 of the concrete base portion 2, and the outer peripheral surface 60, the inner peripheral surface 20 of the anticorrosion sheet 6, The filling pressure of the backfilling material 7 filled during the period is supported.

  As described with reference to FIGS. 1 to 29, one of the features of the temporary formwork member 10 according to the present invention is that the base portion 100 is made of a foamable resin, thereby reducing manufacturing cost and weight. It is in the point which aimed at. Further, one of the features of the temporary mold assembly 1 using the temporary mold member 10 is that the temporary mold member 10 is formed even in a narrow space by being divided in the height direction (or axial direction) T. It is in the point which can carry in by disassembling after carrying out reconstruction work by carrying in plural and making it cylindrical.

  Therefore, the temporary formwork assembly 1 shown in FIG. 30 has all the structural features of the temporary formwork member 10 described with reference to FIGS. 1 to 29 and sewerage facilities using the temporary formwork member 10. Obviously, it can also have all the advantages.

  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 temporary formwork assembly concerning one embodiment of the present invention. It is a top view of the temporary formwork member which comprises the temporary formwork assembly shown in FIG. It is a front view of the temporary formwork member shown in FIG. It is a rear view of the temporary formwork member shown in FIG. It is a fragmentary sectional view which abbreviate | omits one part and shows the reconstruction method of the sewerage facility which concerns on one Embodiment of this invention. FIG. 6 is a diagram showing a step after the step shown in FIG. 5. FIG. 7 is an enlarged perspective view illustrating a part of the process illustrated in FIG. 6. FIG. 8 is a diagram showing a step after the step shown in FIGS. 6 and 7. It is a figure which shows the joint process of a temporary formwork member about the process shown in FIG. FIG. 10 is a diagram showing a state after the step shown in FIG. 9. FIG. 11 is a diagram showing a step after the step shown in FIGS. 8 to 10. FIG. 12 is a diagram showing a step after the step shown in FIG. 11. FIG. 13 is a diagram showing a step after the step shown in FIG. 12. FIG. 14 is a diagram showing a step after the step shown in FIG. 13. It is a plane sectional view showing an internal structure about the sewer facility shown in FIG. It is a top view of the temporary formwork assembly which concerns on another embodiment of this invention. It is a top view of the temporary formwork assembly concerning another embodiment of the present invention. It is a top view of the temporary formwork assembly concerning another embodiment of the present invention. It is front sectional drawing of the temporary formwork assembly shown in FIG. FIG. 20 is a partial cross-sectional view showing a method of joining the temporary mold assembly shown in FIGS. 18 and 19 with a part thereof omitted. It is a fragmentary sectional view which shows the state after the process shown in FIG. It is front sectional drawing of the temporary formwork assembly which concerns on another embodiment of this invention. It is a fragmentary sectional view which abbreviate | omits one part and shows about the joining method of the temporary formwork assembly shown in FIG. FIG. 24 is a partial cross-sectional view showing a state after the step shown in FIG. 23. It is a perspective view of the temporary formwork assembly concerning another embodiment of the present invention. It is a fragmentary sectional view which abbreviate | omits one part and shows about the rebuilding method of the sewer facility which concerns on another embodiment of this invention. FIG. 27 is a diagram showing a step after the step shown in FIG. 26. FIG. 28 is a partial enlarged cross-sectional view showing a part of the process shown in FIG. FIG. 29 is a diagram showing a step after the step shown in FIGS. 27 and 28. It is a fragmentary sectional view which abbreviate | omits one part and shows about the rebuilding method of the sewer facility which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temporary formwork assembly 10 Temporary formwork member 100 Base | substrate part 13 Curved edge 14 Non-curved edge 15-18 The 1st-4th connection part 2 Concrete base part 210 Opening part 6 Corrosion-proof sheet 7 Backing material T Height Direction W Width direction G Interval

Claims (6)

A temporary formwork member that includes a base portion and a connecting portion, and is used for reconstructing a sewerage facility;
The base portion has a plate shape mainly composed of a foamable resin, and has at least one set of two sides facing each other,
The connecting portion has a step for fitting unevenness, and is provided on at least one of the two opposite sides of the base portion.
Temporary formwork member. A temporary formwork member according to claim 1,
The base portion has a circular arc cross section and includes a curved end edge and a non-curved end edge.
The curved edge is two sides facing each other at both ends in the height direction of the base portion,
The non-curved edge is two sides facing each other at both ends in the width direction orthogonal to the height direction,
The connecting portion is provided on at least one side of the non-curved edge.
Temporary formwork member. The temporary formwork member according to claim 1 or 2,
Further, the connecting portion is provided on at least one side of the curved edge.
Temporary formwork member. A temporary formwork assembly used for reconstructing sewerage facilities, including a plurality of temporary formwork members,
The temporary formwork member includes a base portion and a connecting portion,
The base portion has a plate shape mainly composed of a foamable resin, and has at least one set of two sides facing each other,
The connecting portion has a step for fitting unevenness, and is provided on at least one of the two opposite sides of the base portion,
The plurality of temporary formwork members are adjacently connected to each other so as to be disassembled by fitting the concave and convex portions of the connecting portion, and are formed into a cylindrical shape as a whole.
Temporary formwork assembly. A temporary formwork assembly according to claim 4,
At least one of the plurality of temporary formwork members has a cylindrical diameter expanding portion,
The cylinder diameter expanding portion has a groove portion and a wedge piece,
The groove portion is provided along the height direction of the base portion,
The wedge piece expands the diameter of the cylindrical body when driven into the groove, and reduces the diameter of the cylindrical body when removed from the groove,
Temporary formwork assembly. A method for reconstructing a sewerage facility using a plurality of temporary formwork members,
The temporary formwork member includes a base portion and a connecting portion,
The base portion has a plate shape mainly composed of a foamable resin, and has at least one set of two sides facing each other,
The connecting portion has a step for fitting unevenness, and is provided on at least one of the two opposite sides of the base portion,
The sewerage facility has a concrete base portion mainly composed of a concrete material,
Into the internal space of the concrete base portion, a cylindrical anticorrosion sheet having a reduced diameter and a plurality of temporary formwork members are carried,
In the internal space, the anticorrosion sheet is expanded in a cylindrical shape along the inner wall surface,
In the inside of the anticorrosion sheet, the plurality of temporary formwork members are connected to each other at the connecting portion to form a cylinder,
Backfilling material is filled between the inner wall surface of the concrete base portion and the outer peripheral surface of the anticorrosion sheet,
After the curing period of the backfill material, disassemble the temporary formwork assembly and carry it out from the opening of the concrete base part.
Reconstruction method of sewerage facilities including processes.

Images