Rehabilitation structure for manholes or sills, rehabilitation method, and method for constructing a rehabilitation structure.

Abstract

The objective is to provide a manhole or box rehabilitation structure that allows workers to enter the manhole and easily connect rehabilitation pipeline components. [Solution] The rehabilitation structure 1 for a manhole or basin M having an inlet 4 and an outlet 5 comprises a joint 10 fitted into at least one of the inlet 4 and the outlet 5, and a rehabilitation pipe body 20 having a main body side inlet 21A and a main body side outlet 21B, wherein the joint end face 11 on the opposite side of the fitting side of the joint 10 directly or indirectly abuts against the main body side end face of either the main body side inlet 21A or the main body side outlet 21B, and the joint 10 and the rehabilitation pipe body 20 are connected by covering the area around the contact portion 15 or adjacent portion where the joint 10 and the main body side end face 22 abut. The rehabilitation pipe body 20 has positioning portions 40, 40 on the main body side inlet 21A and the main body side outlet 21B.

Description

Technical Field

[0004] , , , , , ,

[0001] The present invention relates to a regeneration structure, a regeneration method, and a construction method of a regeneration structure for a manhole or a manhole cover.

Background Art

[0002] Conventionally, aging manholes and manhole covers need to be regenerated (repaired) due to corrosion, intrusion of foreign matters such as rainwater and grass from joints, or intrusion of tree roots into the manhole, resulting in intrusion of unclear water from the ground. In the regeneration of manholes and manhole covers as described above, conventionally, a person enters the manhole or manhole cover and regenerates it with a regeneration member, or constructs a new manhole or manhole cover itself (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the manhole rehabilitation method described in Patent Document 1 involves excavating the invert of the manhole, leveling the ground so that the bottom of the manhole body and the existing inflow and outflow pipes are at the same height, then butting the connecting pipe of the saddle joint, which is made by bonding a connecting pipe of the same diameter as the existing inflow and outflow pipes to a saddle curved to a radius of curvature corresponding to the inner diameter of the manhole, with the existing inflow pipe, fixing the saddle to the inner wall surface of the manhole with anchor bolts and joining the periphery of the saddle, and then installing the manhole body on the leveled bottom surface of the manhole, with the inflow side receiving portion connected to the connecting pipe of the saddle joint The saddle joint is inserted into the manhole, and the connecting pipe of the saddle joint, with a collar inserted into the connecting pipe, is butted against the existing outflow pipe. The saddle is then fixed to the inner wall of the manhole with anchor bolts, and the periphery of the saddle is joined. After that, the collar is pulled out along the connecting pipe of the saddle joint, leaving one half in the connecting pipe of the saddle joint, and the other half is inserted into the outflow side opening of the manhole. Next, the riser pipe is inserted into the riser receiving opening of the manhole, and then the cover is connected to the top of the riser pipe. After that, mortar is filled into the inside of the manhole and backfilled up to the upper edge of the cover of the riser pipe.

[0005] However, the manhole rehabilitation method described in Patent Document 1 requires workers to enter the manhole and connect the rehabilitation pipeline components. This requires inserting and connecting the rehabilitation pipeline components to each other (for example, saddle joints and manhole bodies) or to existing pipelines (inlet and outlet pipes), which may make the work time-consuming. In particular, in the limited space of a manhole, supporting a relatively heavy manhole body while connecting it to other rehabilitation pipeline components or existing pipelines can place a heavy burden on the workers.

[0006] Therefore, the present invention aims to provide a manhole or box rehabilitation structure, rehabilitation method, and method for constructing a rehabilitation structure that allows workers to easily connect rehabilitation pipeline members by entering the manhole. [Means for solving the problem]

[0007] (1) The rehabilitation structure for a manhole or pit provided by the present invention to solve the above-mentioned problems is a rehabilitation structure for a manhole or pit having an inlet and an outlet, comprising: a joint fitted into at least one of the inlet and the outlet; and a rehabilitation pipe body having a main body side inlet and a main body side outlet, wherein the joint end face on the opposite side from the fitting side is in direct or indirect contact with or close to the main body side end face of either the main body side inlet or the main body side outlet, and the joint and the rehabilitation pipe body are connected by covering the area around the contact portion or close portion where the joint and the main body side end face contact with each other.

[0008] The rehabilitation structure for manholes or drains (hereinafter also simply referred to as "manholes") of the present invention allows for the connection of a joint attached to at least one of the inlet and outlet of the manhole with the end face of the rehabilitation pipe body on the body side, either directly or indirectly, by bringing them into contact or proximity. This enables workers to easily perform connection work inside the manhole. Furthermore, the rehabilitation structure of the present invention connects the joint and the rehabilitation pipe body by covering the area around the contact portion or adjacent portion where the joint and the end face of the rehabilitation pipe body abut with a covering member. This eliminates the need for fitting the joint and the rehabilitation pipe body together. Additionally, because the rehabilitation structure of the present invention connects the joint and the rehabilitation pipe body by covering the contact portion or adjacent portion with a covering member, dimensional errors in the joint and the rehabilitation pipe body can be tolerated within a predetermined range. Therefore, the rehabilitation structure of the present invention improves workability. Here, the covering member can be, for example, a tape-like member, which can be wrapped around the outer circumference of the contact portion or adjacent portion of the joint and the rehabilitation pipe body to provide coverage.

[0009] (2) The rehabilitation structure for a manhole or sill of the present invention described above is characterized in that a short pipe is arranged between the joint and the rehabilitation pipe body, the short pipe has a first short pipe end face on one end and a second short pipe end face on the other end, and the joint and the rehabilitation pipe body are indirectly connected via the short pipe while the joint end face and the first short pipe end face, and the body side end face and the second short pipe end face are in contact or close to each other.

[0010] The rehabilitation structure for manholes or pits of the present invention, when configured as described in (2) above, allows for easy connection of the rehabilitation pipe body to the joint via a short pipe. Furthermore, the rehabilitation structure of the present invention can compensate for connection allowances that cannot be provided by the joint using the short pipe. The configuration described in (2) above is particularly useful when the joint cannot be extended by sliding. Here, the axial length of the short pipe can be appropriately adjusted according to the axial length of the joint and the rehabilitation pipe body. In other words, the short pipe can be used as a length adjustment member between the joint and the rehabilitation pipe body. Moreover, since the rehabilitation structure of the present invention can connect to the joint and the rehabilitation pipe body by abutting or bringing the short pipe close rather than fitting it in, connections can be made even if there is an incline between the joint and the rehabilitation pipe body, or if the diameters of the joint, short pipe, and rehabilitation pipe body are different, as long as they are within a predetermined tolerance range.

[0011] (3) In the rehabilitation structure for a manhole or box according to the present invention described above, the joint is preferably slidable in the axial direction toward the rehabilitation pipe body.

[0012] The rehabilitation structure for manholes or pits of the present invention, when configured as described in (3) above, allows the rehabilitation pipe body and the joint to be connected while adjusting the axial length of the joint within the manhole. Therefore, the rehabilitation structure of the present invention can improve the workability of workers within the manhole. Furthermore, even if there are errors in the length of the joint or the rehabilitation pipe body, the rehabilitation structure of the present invention allows the rehabilitation pipe body and the joint to be connected while finely adjusting the length by sliding in the axial direction. Here, the joint should be configured such that it can slide axially with respect to the inlet or outlet, for example. Alternatively, the joint may have a double structure, and the joint may be configured to be extendable and retractable by drawing out. In such cases, a part of the joint should be extended axially to directly or indirectly contact or approach the end face on the body side.

[0013] (4) In the rehabilitation structure for a manhole or sill of the present invention described above, the rehabilitation pipe body is preferably characterized in that it has a positioning portion at least one of the body-side inlet and the body-side outlet.

[0014] The rehabilitation structure for a manhole or septic tank of the present invention, when configured as described in (4) above, allows at least one of the main body side inlet and main body side outlet to be positioned relative to the joint, short pipe, inlet, and outlet. Therefore, the rehabilitation structure of the present invention allows the rehabilitation pipe body to be positioned relative to the joint, short pipe, inlet, and outlet and connected with high precision.

[0015] (5) In the rehabilitation structure for a manhole or box according to the present invention described above, the positioning portion is preferably formed to protrude in the axial direction so as to engage with at least a part of the joint side.

[0016] The rehabilitation structure for manholes or pits of the present invention, when configured as described in (5) above, allows the positioning portion to be engaged with the joint side (e.g., joint, short pipe) (e.g., hook, fit, insert, etc.). This enables the rehabilitation structure of the present invention to accurately position the rehabilitation pipe body relative to the joint or short pipe. Furthermore, by engaging the positioning portion with at least a part of the joint side, the rehabilitation pipe body can be connected to the joint, etc., while suppressing the fall of the rehabilitation pipe body through the joint or short pipe. Here, the positioning portion can be formed into various shapes, such as canopy-shaped, pin-shaped, or uneven. In addition, by forming the positioning portion in a canopy shape, the rehabilitation structure of the present invention allows the positioning portion to be engaged with the joint or short pipe, etc. on the joint side by hooking it from above. With this configuration, the rehabilitation structure of the present invention can support the rehabilitation pipe body by hooking it onto the joint or short pipe, etc., so it is expected to reduce the burden on the worker in supporting the rehabilitation pipe body.

[0017] (6) The rehabilitation structure for a manhole or box according to the present invention described above is preferably characterized in that an inspection port is provided which communicates with the inside of the rehabilitation pipe body.

[0018] The rehabilitation structure for manholes or pits of the present invention has an inspection port in the rehabilitation pipe body, allowing for easy inspection of the inside of the rehabilitation pipe body and joints. Here, the inspection port can be formed to protrude from the surface of the filling material (e.g., mortar) filled inside the manhole, or it can be formed flush with the surface. If the inspection port protrudes from the surface of the filling material, it is expected to have the effect of suppressing the inflow of foreign matter from around the inspection port. If the inspection port is formed flush with the surface of the filling material, it is expected to have the effect of draining rainwater and other liquids that have entered the manhole through the rehabilitation pipe body. Furthermore, if the upper end surface of the inspection port is lower than the surface of the filling material, it is expected to have the effect of draining rainwater and other liquids that have entered the manhole through the rehabilitation pipe body. In addition, if the surface of the filling material is sloped toward the inspection port, the drainage effect can be further enhanced.

[0019] (7) The rehabilitation structure for a manhole or box according to the present invention described above is preferably characterized in that a cover having a valve is provided at the inspection opening.

[0020] The rehabilitation structure for manholes or pits of the present invention, when configured as described in (7) above, allows for easy inspection of the inside of the rehabilitation pipe body and joints through the inspection port. Therefore, the rehabilitation structure of the present invention improves maintainability. When the internal pressure inside the rehabilitation pipe body and joints increases, the pressure can be released through the valve. This prevents the rehabilitation structure of the present invention from being damaged due to increased internal pressure inside the rehabilitation pipe body and joints. Furthermore, since the rehabilitation structure of the present invention is provided with an inspection port, the inside of the rehabilitation pipe body and joints can be easily inspected by removing or opening the cover. In addition, since the rehabilitation structure of the present invention is provided with a cover, it is possible to prevent foreign matter that enters from outside the manhole from entering the inside of the rehabilitation pipe body and joints.

[0021] (8) The rehabilitation structure for a manhole or box described above is preferably characterized in that a filling material is filled in at least a part of the inside of the manhole or box, and the area around the connected joint and the rehabilitation pipe body is covered with the filling material.

[0022] By configuring the method for rehabilitating a manhole or a manhole cover of the present invention as described in (8) above, the joint and the rehabilitation pipe body are fixed at a predetermined position inside the manhole or the manhole cover. Thereby, the rehabilitation of the manhole or the manhole cover is completed. Further, in the method for rehabilitating a manhole or a manhole cover of the present invention, the strength of the manhole or the manhole cover can be improved by filling a filling material such as mortar.

[0023] (9) The method for rehabilitating a manhole or a manhole cover of the present invention provided to solve the above-described problems is a method for rehabilitating a manhole or a manhole cover having an inlet and an outlet, the method comprising: a joint mounting step of fitting a joint slidable in the axial direction into at least one of the inlet and the outlet; a rehabilitation pipe body introduction step of introducing a rehabilitation pipe body having a main body side inlet and a main body side outlet into the manhole or the manhole cover; a rehabilitation pipe body arrangement step of arranging the rehabilitation pipe body such that the inlet and the main body side inlet, and the main body side outlet and the outlet face each other; a joint extension step of sliding and extending the joint toward the rehabilitation pipe body; a contact / approximation step of directly or indirectly contacting or approaching a joint end face on the side opposite to the fitting side of the joint with a main body side end face of either the main body side inlet or the main body side outlet; and a covering step of covering the periphery of a contact portion where the joint and the main body side end face contact or a portion where they approach with a covering member. By performing these steps, the joint and the rehabilitation pipe body are directly or indirectly connected.

[0024] The method for rehabilitating a manhole or a manhole cover of the present invention can directly or indirectly connect a rehabilitation pipe body to at least one of an inlet and an outlet via a joint by sequentially performing a joint mounting step, a rehabilitation pipe body introduction step, a rehabilitation pipe body arrangement step, a joint extension step, a contact / approximation step, and a covering step. Therefore, in the method for constructing a rehabilitation structure of the present invention, an operator can easily install a rehabilitation pipe body in a manhole and construct a rehabilitation structure.

[0025] (10) The manhole or manhole rehabilitation method of the present invention described above is such that after the execution of the rehabilitation pipe body arrangement step or the joint extension step, a short pipe arrangement step of arranging a short pipe between the joint and the rehabilitation pipe body is executed. The abutting / approaching step is characterized in that the first short pipe end face formed on one end side of the short pipe is abutted against the joint end face, and the second short pipe end face formed on the other end side of the short pipe is abutted against or brought close to the main body side end face.

[0026] By configuring the manhole or manhole rehabilitation method of the present invention as described in (10) above, the rehabilitation pipe body can be easily connected to the joint via the short pipe. Further, the rehabilitation method of the present invention can compensate for the connection allowance that cannot be compensated by the joint with the short pipe. A configuration such as (10) above is preferably adopted as an effective means, for example, when the joint cannot be extended by sliding. Here, the axial length of the short pipe may be appropriately adjusted according to the axial lengths of the joint and the rehabilitation pipe body. That is, the short pipe can be used as a length adjustment member between the joint and the rehabilitation pipe body. Further, since the rehabilitation method of the present invention can connect the joint and the rehabilitation pipe body by abutting or approaching instead of fitting the short pipe, for example, even when there is an inclination between the joint and the rehabilitation pipe body, or when the diameters of the joint, the short pipe, and the rehabilitation pipe body are different, connection can be made within a predetermined error range.

[0027] (11) The manhole or manhole rehabilitation method of the present invention described above is characterized in that a positioning portion is provided at at least one of the main body side inlet and the main body side outlet in the rehabilitation pipe body, and a positioning step is executed in which the joint end face and the main body side end face are positioned so as to face directly or indirectly by the positioning portion prior to the abutting / approaching step.

[0028] By configuring the manhole or manhole rehabilitation method of the present invention as described in (11) above, at least one of the main body side inlet and the main body side outlet can be positioned with respect to the joint, the short pipe, the inlet, and the outlet. Therefore, the rehabilitation method of the present invention can position the rehabilitation pipe body with respect to the joint, the short pipe, the inlet, and the outlet and connect them with high accuracy.

[0029] (12) The method for rehabilitating a manhole or box according to the present invention described above is characterized in that, after the covering step is performed, a filling step is performed in which a filling material is filled in at least a part of the inside of the manhole or box, and the filling step is characterized in that the area around the connected joint and the rehabilitated pipe body is covered with the filling material.

[0030] The method for rehabilitating a manhole or sill of the present invention, when configured as described in (12) above, allows the rehabilitation pipe body to be easily installed inside the manhole, so that workers can easily rehabilitate the manhole from inside the manhole.

[0031] (13) A method for constructing a rehabilitation structure for a manhole or pit, provided to solve the above-mentioned problems, is a method for constructing a rehabilitation structure for a manhole or pit having an inlet and an outlet, comprising: a joint installation step of fitting an axially slidable joint into at least one of the inlet and the outlet; a rehabilitation pipe body introduction step of introducing a rehabilitation pipe body having a main body side inlet and a main body side outlet into the inside of the manhole or pit; and the inlet and the main body side inlet, and the main body side outlet and the outlet facing each other. The method is characterized by constructing a rehabilitation structure for a manhole or basin by performing the following steps: a rehabilitation pipe body placement step of arranging the rehabilitation pipe body; a joint extension step of sliding and extending the joint toward the rehabilitation pipe body; a contact / proximity step of directly or indirectly contacting or bringing close the joint end face on the opposite side of the joint from the fitting side to either the main body side inlet or the main body side outlet end face; and a covering step of covering the area around the contact portion where the joint and the main body side end face contact with a covering member.

[0032] The present invention provides a method for constructing a rehabilitation structure for a manhole or septic tank, which involves sequentially performing a joint installation step, a rehabilitation pipe body introduction step, a rehabilitation pipe body placement step, a joint extension step, a contact / approach step, and a covering step, thereby enabling the connection of the rehabilitation pipe body to at least one of the inlet and outlet via a joint. Therefore, the present invention allows workers to easily install the rehabilitation pipe body and construct the rehabilitation structure within the manhole. [Effects of the Invention]

[0033] According to the present invention, it is possible to provide a manhole or box rehabilitation structure, rehabilitation method, and method for constructing a rehabilitation structure that allows workers to easily connect rehabilitation pipeline members by entering the manhole. [Brief explanation of the drawing]

[0034] [Figure 1] This is a front cross-sectional view of one embodiment of the rehabilitation structure for a manhole or box according to the present invention. [Figure 2] (a) is a front cross-sectional view of the rehabilitation pipe body in the rehabilitation structure for a manhole or box according to the present invention, and (b) is a front cross-sectional view of the joint in the rehabilitation structure according to the present invention. [Figure 3] (a) is an explanatory diagram illustrating the method for rehabilitating a manhole or drain box according to the present invention, and (b) is an explanatory diagram following (a). [Figure 4] (a) is an explanatory diagram illustrating the method for rehabilitating a manhole or drain box according to the present invention, following Figure 3(b), and (b) is an explanatory diagram following (a). [Figure 5] This is a front cross-sectional view of a modified example of the present invention, showing a rehabilitation structure for a box or manhole. [Figure 6] This is an explanatory diagram of a rehabilitation structure for a manhole or box according to a modified example of the present invention. [Modes for carrying out the invention]

[0035] The following describes in detail a rehabilitation structure 1 according to one embodiment of the present invention, with reference to the drawings. Please note that the figures are schematic representations for ease of understanding and may differ from the actual shape, size, and arrangement of components. Also, please note that hatching in the cross-section may be omitted in some figures.

[0036] As shown in Figure 1, the rehabilitation structure 1 is used for the rehabilitation (repair) of a manhole or drain box M. In this embodiment, the case in which the rehabilitation structure 1 is applied to an existing manhole M will be explained as an example.

[0037] The manhole M described here is an existing, deteriorated manhole. The manhole M has, for example, an inner diameter conforming to standards and is formed, for example, in a bottomed cylindrical shape using concrete. A worker can enter the manhole M. As shown in Figure 3(a), the rehabilitation structure 1 is constructed after removing the existing invert (not shown) that is cast into the bottom 2 of the manhole M. As shown in Figure 1, the manhole M is equipped with a vertical pipe 3 running vertically, and an inlet 4 and an outlet 5 are provided in a direction intersecting the vertical pipe 3 (in this embodiment, in a perpendicular direction). A slanted wall 6 is also provided at the top of the vertical pipe 3. In addition, an inlet-side pipe 4A and an outlet-side pipe 5A are connected to the inlet 4 and outlet 5. The manhole M can allow wastewater flowing in from the inlet 4 to flow through to the outlet 5 and be discharged.

[0038] The rehabilitation structure 1 includes an inlet-side joint 10A and an outlet-side joint 10B as joints 10, and a rehabilitation pipe body 20. In addition to the above, the rehabilitation structure 1 also includes an inspection port 23, a cover 24, a covering member 30, a positioning part 40, etc. In the following description, the direction of the axis connecting the inlet 4 and outlet 5 of the manhole M will also be referred to as the axial direction.

[0039] As shown in Figures 1 and 2(b), the inlet-side joint 10A is formed to have a smaller diameter than the inlet-side pipe 4A attached to the inlet 4 of the manhole M, and can be fitted inside the inlet-side pipe 4A. In this embodiment, the inlet-side joint 10A is formed from a resin such as polyvinyl chloride. The inlet-side joint 10A can be fitted to the inner wall of the inlet-side pipe 4A so as to be axially slidable (e.g., sliding). It is preferable that the inlet-side joint 10A be configured to engage with the inner wall of the inlet-side pipe 4A, for example, by at least a portion thereof, so as not to fall out of the inlet-side pipe 4A. The inlet-side joint 10A can be extended or contracted relative to the inlet-side pipe 4A by sliding in the axial direction. As will be described in detail later, the inlet-side joint 10A can be slid toward the main body-side end face 22 of the main body-side inlet 21A of the rehabilitation pipe body 20 (see Figure 2(a)), thereby allowing the joint end face 11 on the opposite side of the fitting side (see Figure 2(b)) to directly contact or be close to (contact in this embodiment) the main body-side end face 22. The inlet-side joint 10A may also be positioned in a position close to the main body-side end face 22 (a position separated from the main body-side end face 22 with a gap).

[0040] The outlet-side joint 10B is formed to have a smaller diameter than the outlet-side pipe 5A attached to the outlet 5 of the manhole M, and can be fitted inside the outlet-side pipe 5A. In this embodiment, the outlet-side joint 10B is made of a resin such as polyvinyl chloride. The outlet-side joint 10B can be fitted to the inner wall of the outlet-side pipe 5A so as to be axially slidable (for example, sliding). It is preferable that the outlet-side joint 10B be configured to engage with the inner wall of the outlet-side pipe 5A, for example, by at least a portion thereof, so as not to fall out of the outlet-side pipe 5A. The outlet-side joint 10B can be extended or contracted relative to the outlet-side pipe 5A by sliding in the axial direction. As will be described in detail later, the outlet-side joint 10B can be slid toward the main body-side end face 22 of the main body-side outlet 21B of the rehabilitation pipe body 20, thereby allowing the joint end face 11 on the opposite side from the fitting side to directly contact or be close to (contact in this embodiment) the main body-side end face 22. The outlet-side joint 10B may also be positioned in a position close to the main body-side end face 22 (a position separated from the main body-side end face 22 with a gap).

[0041] As shown in Figure 1, the rehabilitation pipe body 20 is formed as a cylinder that extends along the axial direction (a direction intersecting the vertical pipe 3) from the inlet 4 to the outlet 5. The rehabilitation pipe body 20 is formed from a resin such as polyvinyl chloride. As shown in Figure 2(a), the rehabilitation pipe body 20 has a body-side inlet 21A opening at one end in the axial direction and a body-side outlet 21B opening at the other end in the axial direction. The body-side inlet 21A has an inlet-side body end face 22A which serves as the body-side end face 22. The body-side outlet 21B has an outlet-side body end face 22B which serves as the body-side end face 22. In this embodiment, a cylindrical branch pipe 23A is erected so as to intersect the axial direction of the rehabilitation pipe body 20.

[0042] The branch pipe 23A is formed in a cylindrical shape, and one end (base end) is connected to an opening in the rehabilitation pipe body 20. The connection between the rehabilitation pipe body 20 and the branch pipe 23A should be sealed by fixing with adhesive or by an appropriate seal (not shown). The other end (tip end) of the branch pipe 23A is open to form an inspection port 23. That is, the rehabilitation pipe body 20 is provided with an inspection port 23 that opens in the direction along the riser pipe 3 of the manhole M (upwards). Therefore, a worker can inspect the inside of the rehabilitation pipe body 20 through the inspection port 23 and the branch pipe 23A. The inspection port 23 is formed to protrude from the upper surface of the filler material 50 (invert 50), which will be described later. This prevents foreign matter that has entered the inside of the manhole M from entering the inside of the rehabilitation pipe body 20 through the inspection port 23. The inspection port 23 can also be formed to open flush with the upper surface of the filler material 50. In such cases, rainwater that has entered the manhole M can be discharged into the rehabilitation pipe body 20 through the inspection opening 23.

[0043] Furthermore, as shown in Figure 1, in this embodiment, a cover 24 is fitted over the inspection port 23 so as to be openable and closable. The cover 24 can prevent foreign matter from entering through the inspection port 23. A valve 25 is also provided on the cover 24. The valve 25 can adjust the internal pressure inside the rehabilitation pipe body 20. For example, when the internal pressure of the rehabilitation pipe body 20 becomes high, the valve 25 can release the pressure and return it to atmospheric pressure. This prevents the internal pressure of the rehabilitation pipe body 20 from rising and causing drainage or other liquids to spray out from the inspection port 23. Various types of valves, such as pressure reducing valves, can be used for the valve 25.

[0044] The covering member 30 is made of, for example, a tape-shaped adhesive member. The covering member 30 is wrapped around the contact portion 15 where the joint 10 and the main body end face 22 abut, thereby covering the contact portion 15. This connects the joint 10 and the rehabilitation pipe body 20. More specifically, the inlet joint 10A and the inlet body end face 22A are connected by wrapping the covering member 30 around the contact portion 15 (also referred to as the boundary portion 15) formed by sliding the inlet joint 10A axially and bringing it into contact with the inlet body end face 22A. Note that the covering member 30 is not limited to providing the contact portion 15; for example, it may also be used to bring the inlet joint 10A closer to the inlet body end face 22A by sliding it axially. In such a case, there may be a gap between the inlet joint 10A and the inlet body end face 22A. On the other hand, the outlet-side joint 10B and the outlet-side end face 22B are connected by winding the covering member 30 around the contact portion 15 formed by sliding the outlet-side joint 10B in the axial direction and bringing it into contact with the outlet-side end face 22B of the main body. In this way, the inlet-side joint 10A and the inlet-side end face 22A, and the outlet-side joint 10B and the outlet-side end face 22B are connected, thereby supporting the rehabilitation pipe body 20 between the inlet 4 and the outlet 5 via the joint 10. Note that the covering member 30 is not limited to providing the contact portion 15; for example, it may also be designed to slide the outlet-side joint 10B in the axial direction and bring it closer to the outlet-side end face 22B of the main body. In such a case, there may be a gap between the outlet-side joint 10B and the outlet-side end face 22B of the main body.

[0045] The positioning section 40 is provided on at least one of the main body-side inlet 21A and the main body-side outlet 21B of the rehabilitation pipe body 20 (in this embodiment, both the main body-side inlet 21A and the main body-side outlet 21B). In this embodiment, since the positioning sections 40 on the main body-side inlet 21A and the main body-side outlet 21B have the same configuration, unless there is a particular need to distinguish between them, the positioning section 40 on one side (the main body-side inlet 21A side) will be described, and the description of the other side will be omitted.

[0046] Multiple positioning portions 40 are provided at intervals (for example, three) on the upper side of the opening edge of the main body side inlet 21A. The positioning portions 40 are provided so as to protrude axially from the main body side inlet 21A. In other words, the positioning portions 40 are formed in the shape of an overhang that protrudes axially from the main body side inlet 21A. The positioning portions 40 can be hooked (engaged) onto the upper side of the opening edge of the inlet side joint 10A that abuts against the main body side inlet 21A. As a result, the positioning portions 40 can bring the joint end face 11 of the inlet side joint 10A into contact with the inlet side main body end face 22A (main body side end face 22) in a positioned (centered) state. Furthermore, although a detailed explanation will be omitted, the positioning section 40 provided at the main body outlet 21B, like the positioning section 40 provided at the main body inlet 21A, can position (center) the joint end face 11 of the outlet joint 10B against the outlet main body end face 22B (main body end face 22). Therefore, the positioning section 40 can suspend and support the rehabilitation pipe body 20 on the joint 10. Once positioned by the positioning section 40 and the joint end face 11 and the main body end face 22 come into contact, the contact section 15 is covered by the covering member 30 described above, and the joint 10 and the rehabilitation pipe body 20 are connected. In this embodiment, the inlet joint 10A and the inlet main body end face 22A, and the outlet joint 10B and the outlet main body end face 22B are positioned by contact, but positioning can also be performed by proximity rather than contact.

[0047] When the joint 10 and the rehabilitation pipe body 20 are connected, a filler material 50 (also referred to as mortar 50 or invert 50) is filled into the bottom 2 of the manhole M from the opening 7 of the manhole M. Here, the filler material 50 preferably has good adhesion to the material of the manhole M. For example, if the material of the manhole M is concrete as in this embodiment, mortar is preferably used. The filler material 50 is filled to the extent that, for example, the area around the connected joint 10 and the rehabilitation pipe body 20 is covered. This constructs the rehabilitation structure 1 of the present invention.

[0048] The above is one embodiment of the rehabilitation structure 1 of the present invention. Next, the effects and benefits realized by the rehabilitation structure 1 of the present invention will be described in detail below.

[0049] The rehabilitation structure 1 of the present invention described above has the following characteristic configurations: (a), (c) to (h). Therefore, the rehabilitation structure 1 of the present invention can achieve unique effects that cannot be achieved with the prior art, as described below.

[0050] (a) The rehabilitation structure 1 for a manhole or pit M of this embodiment is a rehabilitation structure 1 for a manhole or pit M having an inlet 4 and an outlet 5, comprising a joint 10 fitted into at least one of the inlet 4 and the outlet 5, and a rehabilitation pipe body 20 having a main body side inlet 21A and a main body side outlet 21B, wherein the joint end face 11 on the opposite side of the fitting side of the joint 10 directly or indirectly abuts or is in close proximity to the main body side end face 22 of either the main body side inlet 21A or the main body side outlet 21B, and the joint 10 and the rehabilitation pipe body 20 are connected by covering the area around the abutment portion 15 or the adjacent portion where the joint 10 and the main body side end face 22 abut.

[0051] The rehabilitation structure 1 (hereinafter also simply referred to as rehabilitation structure 1) of the manhole or pit M (hereinafter also simply referred to as manhole M) of this embodiment allows the joint 10 attached to at least one of the inlet 4 and outlet 5 of the manhole M to be connected to the main body end face 22 of the rehabilitation pipe body 20 by directly or indirectly contacting or bringing them into close proximity, so that workers can easily perform connection work inside the manhole M. Furthermore, the rehabilitation structure 1 of this embodiment connects the joint 10 and the rehabilitation pipe body 20 by covering the area around the contact portion 15 or the adjacent portion where the joint 10 and the main body end face 22 contact with a covering member 30, so that the joint 10 and the rehabilitation pipe body 20 can be easily connected without performing fitting work. In addition, since the rehabilitation structure 1 of this embodiment is connected by covering the contact portion 15 or the adjacent portion with the covering member 30, dimensional errors of the joint 10 and the rehabilitation pipe body 20 can be tolerated within a predetermined range. Therefore, the rehabilitation structure 1 of this embodiment can improve workability. Here, the covering member 30 can be, for example, a tape-shaped member, and one can be used that is wrapped around the outer circumference of the contact portion 15 or adjacent portion of the joint 10 and the rehabilitation pipe body 20 to provide coverage.

[0052] (c) In the rehabilitation structure 1 for the manhole or box M of this embodiment described above, the joint 10 is characterized in that it is slidable in the axial direction toward the rehabilitation pipe body 20.

[0053] The rehabilitation structure 1 for the manhole or pit in this embodiment, when configured as described in (c) above, allows the rehabilitation pipe body 20 and the joint 10 to be connected while adjusting the axial length of the joint 10 within the manhole M. Therefore, the rehabilitation structure 1 of this embodiment can improve the workability of workers within the manhole M. Furthermore, even if there are errors in the length direction of the joint 10 or the rehabilitation pipe body 20, the rehabilitation structure 1 of this embodiment allows the rehabilitation pipe body 20 and the joint 10 to be connected while finely adjusting the length by sliding in the axial direction. Here, the joint 10 should be configured to slide axially relative to the inlet 4 or outlet 5, for example. Alternatively, the joint 10 may have a double structure, and the joint 10 may be configured to be extendable and retractable by drawing it out. In such a case, a part of the joint 10 should be extended axially to directly or indirectly contact or approach the end face 22 on the body side.

[0054] (d) In the rehabilitation structure 1 for the manhole or box M of this embodiment described above, the rehabilitation pipe body 20 is characterized in that it has a positioning portion 40 at least one of the body-side inlet 21A and the body-side outlet 21B.

[0055] The rehabilitation structure 1 for the manhole or sill M of this embodiment, when configured as described in (d) above, allows at least one of the main body side inlet 21A and the main body side outlet 21B to be positioned relative to the joint 10, short pipe 110, inlet 4, and outlet 5. Therefore, the rehabilitation structure 1 of this embodiment allows the rehabilitation pipe body 20 to be positioned relative to the joint 10, short pipe 110, inlet 4, and outlet 5 and connected with high precision.

[0056] (e) In the rehabilitation structure 1 for the manhole or box M of this embodiment described above, the positioning portion 40 is characterized in that it is formed to protrude in the axial direction so as to engage with at least a part of the joint 10 side.

[0057] The rehabilitation structure 1 for the manhole or box M of this embodiment, when configured as described in (e) above, allows the positioning portion 40 to engage with the joint 10 side (for example, the joint 10, the short pipe 110) (for example, by hooking, fitting, inserting, etc.). This enables the rehabilitation structure 1 of this embodiment to accurately position the rehabilitation pipe body 20 relative to the joint 10 and the short pipe 110. Furthermore, by engaging the positioning portion 40 with at least a part of the joint 10 side, the rehabilitation pipe body 20 can be connected to the joint 10, etc., while suppressing the fall of the rehabilitation pipe body 20 through the joint 10 and the short pipe 110. Here, the positioning portion 40 can be formed into various shapes, such as canopy-shaped, pin-shaped, or uneven. In addition, by forming the positioning portion 40 in a canopy shape, the rehabilitation structure 1 of this embodiment allows the positioning portion 40 to engage with the joint 10 and the short pipe 110, etc. on the joint 10 side by hooking it from above. The rehabilitation structure 1 of this embodiment, by having such a configuration, allows the rehabilitation pipe body 20 to be hooked onto and supported by the joint 10, short pipe 110, etc., and is expected to reduce the burden on the worker in supporting the rehabilitation pipe body 20.

[0058] (f) The rehabilitation structure 1 of the manhole or box M of this embodiment described above is characterized in that an inspection port 23 is provided which communicates with the inside of the rehabilitation pipe body 20.

[0059] In this embodiment, the rehabilitation structure 1 for a manhole or box M has an inspection port 23 in the rehabilitation pipe body 20, allowing for easy inspection of the inside of the rehabilitation pipe body 20 and the joint 10. Here, the inspection port 23 can be formed to protrude from the surface of the filler material 50 filled inside the manhole M, or it can be formed flush with the surface. If the inspection port 23 protrudes from the surface of the filler material 50, it is expected to have the effect of suppressing the inflow of foreign matter from around the inspection port 23. If the inspection port 23 is formed flush with the surface of the filler material 50, it is expected to have the effect of draining rainwater and the like that has entered the manhole M through the rehabilitation pipe body 20. Furthermore, if the upper end surface of the inspection port 23 is lower than the surface of the filler material 50, it is expected to have the effect of draining rainwater and the like that that has entered the manhole M through the rehabilitation pipe body 20. In addition, the drainage effect can be further enhanced by providing a slope on the surface of the filler material 50 toward the inspection port 23.

[0060] (g) The rehabilitation structure 1 for the manhole or box M of this embodiment described above is characterized in that a cover 24 having a valve 25 is provided in the inspection opening 23.

[0061] The rehabilitation structure 1 for the manhole or box M of this embodiment, configured as described in (g) above, allows for easy inspection of the inside of the rehabilitation pipe body 20 and joint 10 through the inspection port 23. Therefore, the rehabilitation structure 1 of this embodiment has improved maintainability. When the internal pressure inside the rehabilitation pipe body 20 and joint 10 increases, the pressure can be released through the valve 25. This prevents the rehabilitation structure 1 of this embodiment from being damaged due to increased internal pressure inside the rehabilitation pipe body 20 and joint 10. Furthermore, since the rehabilitation structure 1 of this embodiment is provided with an inspection port 23, the inside of the rehabilitation pipe body 20 and joint 10 can be easily inspected by removing or opening the cover 24. In addition, since the rehabilitation structure 1 of this embodiment is provided with a cover 24, it is possible to prevent foreign objects that have entered from outside the manhole M from entering the inside of the rehabilitation pipe body 20 and joint 10.

[0062] (h) The rehabilitation structure 1 for the manhole or box M of this embodiment described above is characterized in that the filling material 50 is filled in at least a part of the inside of the manhole or box M, and the area around the connected joint 10 and the rehabilitation pipe body 20 is covered with the filling material 50.

[0063] In this embodiment, the method for rehabilitating a manhole or box M is configured as described in (h) above, so that the joint 10 and the rehabilitation pipe body 20 are fixed in a predetermined position inside the manhole or box M. This completes the rehabilitation of the manhole or box M. Furthermore, in this embodiment, the method for rehabilitating a manhole or box M can improve the strength of the manhole or box M by filling it with a filler material such as mortar.

[0064] The above describes the configuration and effects of the rehabilitation structure 1 of the present invention. However, the rehabilitation structure 1 of the present invention is not limited to the embodiments and modifications described above, and various modifications can be made within the scope of the present invention. For example, the rehabilitation structure 1 may be as described in (a) above, and can be formed in various shapes and sizes. Furthermore, the rehabilitation structure 1 of the present invention may, for example, not include some or all of the configurations described in (c) to (h) above, or may include some or all of the configurations described in (c) to (h) above, and other configurations.

[0065] Here, the rehabilitation structure 1 can be configured as shown in the following modified example. The details of the rehabilitation structure 100 relating to the modified example will be explained below with reference to Figures 5 and 6. Note that in Figure 6, only the inlet side joint 10A and the short pipe 110 are shown, and the outlet side joint 10B and the short pipe 110 on the other side are omitted. Also, since the inlet side and the outlet side are arranged symmetrically, only the inlet side will be explained in the following explanation, and the explanation of the outlet side will be omitted.

[0066] As shown in Figure 5, in the rehabilitation structure 100 according to a modified example of the present invention, short pipes 110 are arranged between the rehabilitation pipe body 20 and the inlet side joint 10A, and between the rehabilitation pipe body 20 and the outlet side joint 10B.

[0067] As shown in Figure 6, in the rehabilitation structure 100, instead of sliding the inlet-side joint 10A, a short pipe 110 is placed between the inlet-side joint 10A and the main body-side inlet 21A, and the gap between the inlet-side joint 10A and the main body-side inlet 21A is filled by the short pipe 110. In other words, the short pipe 110 functions as a spacer. The short pipe 110 is formed to be approximately the same diameter as the inlet-side joint 10A and the main body-side inlet 21A. The short pipe 110 also has a first short pipe end face 111 on one end in the axial direction and a second short pipe end face 112 on the other end in the axial direction. The short pipe 110 can also be configured to be inserted into or fitted to the outer circumference of the inlet-side joint 10A and the main body-side inlet 21A.

[0068] As shown in Figure 5, when the short pipe 110 is placed between the inlet-side fitting 10A and the rehabilitation pipe body 20, the fitting end face 11 and the first short pipe end face 111 come into contact with or are in close proximity (in this embodiment, they come into contact), and the body-side end face 22 of the rehabilitation pipe body 20 and the second short pipe end face 112 come into contact with or are in close proximity. After this, the outer circumference of the respective contact portions 15 (boundary portions 15) or adjacent portions of the fitting end face 11 and the first short pipe end face 111, and the body-side end face 22 and the second short pipe end face 112 are covered with a covering member 30. In this modified example, the covering member 30 is made up of a tape-shaped adhesive member, similar to the above embodiment, and the tape-shaped adhesive member is wrapped around the outer circumference of the contact portion 15. As a result, the inlet-side fitting 10A and the body-side end face 22 are indirectly connected by coming into contact with or being in close proximity to each other via the short pipe 110.

[0069] The above describes the configuration of the rehabilitation structure 100 according to a modified version of the present invention. Next, the effects and advantages realized by the rehabilitation structure 100 of the present invention will be described in detail below.

[0070] The rehabilitation structure 100 according to the modified version of the present invention described above has the following characteristic configuration in addition to (a) above. Therefore, the rehabilitation structure 100 of the present invention can achieve unique effects that cannot be achieved with the prior art, as described below.

[0071] (b) A modified example of this embodiment of the rehabilitation structure 100 for a manhole or box M is characterized in that a short pipe 110 is arranged between the joint 10 and the rehabilitation pipe body 20, the short pipe 110 has a first short pipe end face 111 on one end and a second short pipe end face 112 on the other end, and the joint 10 and the rehabilitation pipe body 20 are indirectly connected via the short pipe 110 with the joint end face 11 and the first short pipe end face 111, and the body side end face 22 and the second short pipe end face 112 in contact or close to each other.

[0072] The rehabilitation structure 1 for the manhole or box M of this embodiment, when configured as described in (b) above, allows the rehabilitation pipe body 20 to be easily connected to the joint 10 via the short pipe 110. Furthermore, the rehabilitation structure 1 of this embodiment can use the short pipe 110 to compensate for any connection length that cannot be provided by the joint 10. The configuration described in (b) above is particularly useful when the joint 10 cannot be extended by sliding. Here, the axial length of the short pipe 110 can be adjusted as appropriate according to the axial length of the joint 10 and the rehabilitation pipe body 20. In other words, the short pipe 110 can be used as a length adjustment member between the joint 10 and the rehabilitation pipe body 20. Furthermore, in this embodiment, the rehabilitation structure 1 can be connected to the joint 10 and the rehabilitation pipe body 20 by bringing the short pipe 110 into contact with or close to it rather than fitting it in. Therefore, even if there is a slope between the joint 10 and the rehabilitation pipe body 20, or if the diameters of the joint 10, the short pipe 110, and the rehabilitation pipe body 20 are different, the connection can be made as long as it is within a predetermined tolerance range.

[0073] The above describes the configuration of the rehabilitation structure 100 for a manhole or box M according to a modified example of the present invention. Next, the rehabilitation method for a manhole or box M and the method for constructing the rehabilitation structure 1 according to the present invention will be described below with reference to Figures 3 and 4.

[0074] As shown in Figure 3(a), the inlet-side joint 10A and the outlet-side joint 10B are introduced into the manhole M through the opening 7 (see Figure 1) (joint introduction process). Subsequently, the inlet-side joint 10A is fitted into the inlet 4 and the outlet-side joint 10B is fitted into the outlet 5 (joint installation process).

[0075] Next, the rehabilitation pipe body 20 is introduced into the manhole M (rehabilitation pipe body introduction process). Subsequently, the rehabilitation pipe body 20 is positioned so that the inlet 4, the main body side inlet 21A of the rehabilitation pipe body 20, and the main body side outlet 21B and outlet 5 of the rehabilitation pipe body 20 face each other (rehabilitation pipe body positioning process).

[0076] Next, as shown by the arrows in Figure 3(a), the inlet-side joint 10A and the outlet-side joint 10B (also referred to as joints 10, 10) are slid and extended toward the rehabilitation pipe body 20 (joint extension process). At this time, the positioning unit 40 positions the joint end face 11 and the body-side end face 22 so that they face each other directly or indirectly (directly in this embodiment) (positioning process).

[0077] As the positioning process is performed, as shown in Figure 3(b), the end face 11 of the inlet-side joint 10A opposite to the fitting side comes into contact with or approach (in this embodiment, into contact) the end face 22A of the inlet-side main body (contact / proximity process). Also, the end face 11 of the outlet-side joint 10B opposite to the fitting side comes into contact with or approach (in this embodiment, into contact) the end face 22B of the outlet-side main body (contact / proximity process).

[0078] When the contact and proximity process is performed, the area around the contact portion 15, 15 or the adjacent portion where the joints 10, 10 and the main body side end faces 22, 22 come into contact is covered by the covering member 30 (covering process). In this way, the joints 10, 10 and the rehabilitation pipe body 20 are connected.

[0079] Next, as shown in Figure 4(a), in this embodiment, after the above covering step is performed, a filler material 50 (in this embodiment, for example, mortar) is filled into at least a portion of the inside of the manhole M (filler material filling step). As a result, the area around the connected joints 10, 10 and the rehabilitation pipe body 20 is covered with the filler material 50.

[0080] Furthermore, as shown in Figure 4(b), in this embodiment, after the filling material filling process is performed, a cover 24 equipped with a valve 25 is placed over the inspection port 23 (cover installation process). The cover 24 may be installed on the rehabilitation pipe body 20 from the beginning, or it may be installed at one of the intermediate steps.

[0081] The above describes the configuration of the method for rehabilitating a manhole or box M and the method for constructing the rehabilitation structure 1 of the present invention. Next, the effects and benefits realized by the method for rehabilitating a manhole or box M and the method for constructing the rehabilitation structure 1 of the present invention will be described in detail below.

[0082] The rehabilitation method and the method for constructing the rehabilitation structure 1 of the present invention described above have the following characteristic configurations (i) to (m). Therefore, the rehabilitation method and the method for constructing the rehabilitation structure 1 of the present invention can achieve unique effects that cannot be achieved by the prior art, as described below.

[0083] (i) A method for rehabilitating a manhole or pit M of this embodiment, provided to solve the above-mentioned problems, is a method for rehabilitating a manhole or pit M having an inlet 4 and an outlet 5, comprising: a joint installation step of fitting an axially slidable joint 10 into at least one of the inlet 4 and the outlet 5; a rehabilitating pipe body introduction step of introducing a rehabilitating pipe body 20 having a main body side inlet 21A and a main body side outlet 21B into the inside of the manhole or pit M; and arranging the rehabilitating pipe body 20 such that the inlet 4 and the main body side inlet 21A, and the main body side outlet 21B and the outlet 5 face each other. The method is characterized by directly or indirectly connecting the joint 10 and the rehabilitation pipe body 20 by performing the following steps: a rehabilitation pipe body placement step; a joint extension step in which the joint 10 is slid toward the rehabilitation pipe body 20 to extend it; a contact / proximity step in which the joint end face 11 of the joint 10 opposite to the fitting side comes into direct or indirect contact with or comes into close proximity to either the main body side inlet 21A or the main body side outlet 21B; and a covering step in which the area around the contact portion 15 or the portion that comes into close contact with the joint 10 and the main body side end face 22 comes into contact with a covering member 30.

[0084] The rehabilitation method for a manhole or basin M in this embodiment involves sequentially performing a joint installation step, a rehabilitation pipe body introduction step, a rehabilitation pipe body placement step, a joint extension step, abutment / proximity step, and a covering step, thereby enabling the rehabilitation pipe body 20 to be connected directly or indirectly to at least one of the inlet 4 and outlet 5 via a joint 10. Therefore, the method for constructing the rehabilitation structure 1 in this embodiment allows workers to easily install the rehabilitation pipe body 20 inside the manhole M and construct the rehabilitation structure 1.

[0085] (j) The method for rehabilitating a manhole or box M according to the above embodiment is characterized in that, after the execution of the rehabilitation pipe body placement step or the joint extension step, a short pipe placement step is performed in which a short pipe 110 is placed between the joint 10 and the rehabilitation pipe body 20, and the contact / proximity step is characterized in that the first short pipe end face 111 formed on one end of the short pipe 110 is brought into contact with or close to the joint end face 11, and the second short pipe end face 112 formed on the other end of the short pipe 110 is brought into contact with or close to the body side end face 22.

[0086] The rehabilitation method for a manhole or sill in this embodiment, when configured as described in (j) above, allows for easy connection of the rehabilitation pipe body 20 to the joint 10 via the short pipe 110. Furthermore, the rehabilitation method in this embodiment allows for the use of the short pipe 110 to compensate for any connection allowance that cannot be provided by the joint 10. The configuration described in (j) above is particularly useful when the joint 10 cannot be extended by sliding. Here, the axial length of the short pipe 110 can be appropriately adjusted according to the axial length of the joint 10 and the rehabilitation pipe body 20. In other words, the short pipe 110 can be used as a length adjustment member between the joint 10 and the rehabilitation pipe body 20. Furthermore, in this embodiment, the rehabilitation method allows the short pipe 110 to be connected to the joint 10 and the rehabilitation pipe body 20 by contact or proximity rather than by fitting. Therefore, even if there is a slope between the joint 10 and the rehabilitation pipe body 20, or if the diameters of the joint 10, the short pipe 110, and the rehabilitation pipe body 20 are different, the connection can be made as long as it is within a predetermined tolerance range.

[0087] (k) The method for rehabilitating a manhole or box M according to the above embodiment is characterized in that a positioning section 40 is provided on at least one of the main body side inlet 21A and the main body side outlet 21B of the rehabilitated pipe body 20, and prior to the contact and proximity step, a positioning step is performed in which the positioning section 40 positions the joint end face 11 and the main body side end face 22 so that they face each other directly or indirectly.

[0088] The rehabilitation method for a manhole or septic tank M of this embodiment, when configured as described in (k) above, allows at least one of the main body side inlet 21A and the main body side outlet 21B to be positioned relative to the joint 10, short pipe 110, inlet 4, and outlet 5. Therefore, the rehabilitation method of this embodiment allows the rehabilitation pipe body 20 to be positioned relative to the joint 10, short pipe 110, inlet 4, and outlet 5 and connected with high precision.

[0089] (l) The method for rehabilitating a manhole or box M according to the above-described embodiment is characterized in that, after the contact portion covering step is performed, a filling step is performed in which a filling material 50 is filled in at least a part of the inside of the manhole or box M, and the filling step is characterized in that the area around the connected joint 10 and the rehabilitation pipe body 20 is covered with the filling material 50.

[0090] The method for rehabilitating a manhole or sill in this embodiment, when configured as described in (l) above, allows the rehabilitation pipe body 20 to be easily installed inside the manhole M, so that workers can easily rehabilitate the manhole M from inside the manhole M.

[0091] (m) A method for constructing a rehabilitation structure 1 for a manhole or box M of this embodiment, provided to solve the above-mentioned problems, is a method for constructing a rehabilitation structure 1 for a manhole or box M having an inlet 4 and an outlet 5, comprising: a joint installation step of fitting an axially slidable joint 10 into at least one of the inlet 4 and the outlet 5; a rehabilitation pipe body introduction step of introducing a rehabilitation pipe body 20 having a main body side inlet 21A and a main body side outlet 21B into the inside of the manhole or box M, and the inlet 4 and the main body side inlet 21A, and the main body side outlet 21B and the outlet 5 so that they face each other The rehabilitation structure 1 for a manhole or basin is constructed by performing the following steps: a rehabilitation pipe body placement step of positioning the rehabilitation pipe body 20; a joint extension step of sliding and extending the joint 10 toward the rehabilitation pipe body 20; a contact / proximity step of directly or indirectly contacting or bringing close the joint end face 11 of the joint 10 opposite to the fitting side to either the main body side inlet 21A or the main body side outlet 21B to the main body side end face 22; and a covering step of covering the area around the contact portion 15 or the adjacent portion where the joint 10 and the main body side end face 22 contact with a covering member 30.

[0092] The method for constructing the rehabilitation structure 1 of a manhole or basin M in this embodiment involves sequentially performing a joint installation step, a rehabilitation pipe body introduction step, a rehabilitation pipe body placement step, a joint extension step, abutment / proximity step, and a covering step, thereby enabling the connection of the rehabilitation pipe body 20 to at least one of the inlet 4 and outlet 5 via a joint 10. Therefore, the method for constructing the rehabilitation structure 1 in this embodiment allows workers to easily install the rehabilitation pipe body 20 inside the manhole M and construct the rehabilitation structure 1.

[0093] The above describes the configuration and effects of the method for rehabilitating a manhole or box M and the method for constructing a rehabilitation structure 1 of the present invention. However, the method for rehabilitating a manhole or box M and the method for constructing a rehabilitation structure 1 of the present invention are not limited to the embodiments and modifications described above, and various modifications can be made within the scope of the present invention. For example, the method for rehabilitating a manhole or box M and the method for constructing a rehabilitation structure 1 may be as described in (i) or (m) above, and can be composed of a combination of various processes. Furthermore, the method for rehabilitating a manhole or box M and the method for constructing a rehabilitation structure 1 of the present invention may, for example, not include some or all of the configurations related to (j) to (l) above, or may include some or all of (j) to (l) above and other configurations.

[0094] In this embodiment, the rehabilitation (repair) of a manhole M is illustrated as an example, but the rehabilitation structure 1 of the present invention can be applied not only to manholes M into which a person can enter, but also to manholes and boxes of various shapes and sizes, regardless of whether a person can enter or not. In the case of manholes, etc., into which a person cannot enter, it is preferable to construct or rehabilitate the rehabilitation structure 1 using robots, jigs, etc., or by manual labor. Furthermore, in this embodiment, the application to a manhole M equipped with one inlet 4 and one outlet 5 is illustrated as an example, but the rehabilitation structure 1 of the present invention may be provided with multiple inlets 4 and outlets 5, or both. In addition, the rehabilitation structure 1 of the present invention can be used for manholes or boxes M having inlets 4 and outlets 5 of various shapes and sizes. Furthermore, the rehabilitation pipe body 20 can be made of various shapes, sizes and materials depending on the shape and size of the manhole M, etc. Furthermore, the body-side inlets 21A can be made of various shapes, sizes and quantities depending on the inlets 4 and outlets 5.

[0095] Furthermore, the joint 10, the rehabilitation pipe body 20, and the short pipe 110 are not limited to those of the embodiment described above, and can be of various shapes, sizes, quantities, and materials. For example, the materials constituting the joint 10, the rehabilitation pipe body 20, and the short pipe 110 are not particularly limited, and can be of various materials, including various known resin materials such as plastics and rubber. Also, the positioning part 40 can be provided on the joint 10 side instead of the rehabilitation pipe body 20. In such a case, it is preferable to provide the positioning part 40 on the lower side of the opening edge of the joint 10 and support the rehabilitation pipe body 20 by placing it on the positioning part 40. In this embodiment, a positioning part 40 formed in the shape of an overhang is exemplified, but the positioning part 40 can be of various shapes, sizes, positions, quantities, and materials. For example, there may be multiple positioning parts 40, or the engagement between the positioning part 40 and the joint 10 may be by insertion or the like, rather than by suspension by hooking. In addition, the positioning portion 40 may be formed integrally with the rehabilitation pipe body 20, or a separately constructed positioning portion 40 may be connected to the rehabilitation pipe body 20 by adhesive, bolting, or other means.

[0096] Furthermore, the filler material 50 (invert 50) to be poured into the manhole M can be poured in various shapes and areas depending on the shape, size, and position of the joint 10, the rehabilitation pipe body 20, the inlet 4, and the outlet 5. In addition, the material used for the filler material 50 is not limited to mortar; various materials such as concrete and resin can also be used.

[0097] Furthermore, in this embodiment, joints 10 are provided at both the inlet 4 and the outlet 5, but if connection is to only one side, the joints 10 can be provided only on one side of either the inlet 4 or the outlet 5. Also, in this modified example, the rehabilitation pipe body 20 is connected to both the inlet 4 and the outlet 5 via a short pipe 110, but the short pipe 110 may be provided on only one side. In addition, the rehabilitation pipe body 20 can be connected directly to the inlet 4 and the outlet 5 without using joints 10 or short pipes 110. In such a case, it is preferable that the body-side end face 22 of the rehabilitation pipe body 20 and the open end faces of the inlet 4 and the outlet 5 are arranged to abut each other, and the abutment portion 15 is covered by the covering member 30 so that they are connected to each other.

[0098] The above describes various embodiments and modifications of the rehabilitation structure, rehabilitation method, and method for constructing the rehabilitation structure for a manhole or box according to the present invention. However, the present invention is not limited to those exemplified in the embodiments and modifications described above, and it will be readily apparent to those skilled in the art that other embodiments may exist in the spirit and teachings thereof, without departing from the scope of the claims. [Industrial applicability]

[0099] The rehabilitation structure, rehabilitation method, and construction method for manholes or pits of the present invention can be used for the rehabilitation (repair) of various types of manholes and pits, such as manholes installed in houses and other buildings, and manholes installed in roads and other buildings. [Explanation of Symbols]

[0100] 1: Rehabilitation structure 4:Inlet 5: Outlet 10: Fittings 10A: Inlet side fitting 10B: Outlet side fitting 11: Joint end face 15: Contact part (boundary part) 20: Rehabilitation pipe body 21A: Main body inlet 21B: Main body side outlet 22: Main body side end face 22A:Inflow side main body end face 22B:Outflow side main body end face 23: Inspection hatch 24: Lid 25: Valve 30: Covering material 40: Positioning section 50: Filling material (mortar, invert) 100: Rehabilitation structure 110: Short tube M: Manhole

Claims

1. A rehabilitation structure for a manhole or septic tank equipped with an inlet and an outlet, A fitting fitted into at least one of the inlet and the outlet, A rehabilitation pipe body having a main body side inlet and main body side outlet, Equipped with, The aforementioned joint is such that the joint end face opposite to the fitting side directly or indirectly abuts or comes into close proximity to either the main body side end face of the main body side inlet or the main body side outlet. A manhole or box rehabilitation structure characterized in that the joint and the rehabilitation pipe body are connected by covering the area around the contact portion or adjacent portion where the joint and the end face of the main body abut with a covering member.

2. A short pipe is placed between the joint and the rehabilitation pipe body. The short pipe has a first short pipe end face on one end and a second short pipe end face on the other end. The rehabilitation structure for a manhole or box according to claim 1, characterized in that the joint and the rehabilitation pipe body are indirectly connected via the short pipe while the joint end face and the first short pipe end face, and the main body side end face and the second short pipe end face are in contact with or close to each other.

3. The rehabilitation structure for a manhole or box according to claim 1 or 2, characterized in that the joint is slidable in the axial direction toward the rehabilitation pipe body.

4. The rehabilitation structure for a manhole or pit according to claim 1 or 2, characterized in that the rehabilitation pipe body has a positioning portion at least one of the body-side inlet and the body-side outlet.

5. The manhole or box rehabilitation structure according to claim 4, characterized in that the positioning portion is formed to protrude in the axial direction so as to engage with at least a portion of the joint side.

6. The rehabilitation structure for a manhole or box according to claim 1 or 2, characterized in that an inspection port communicating with the inside of the rehabilitation pipe body is provided.

7. The manhole or box rehabilitation structure according to claim 6, characterized in that a lid having a valve is provided in the inspection opening.

8. The inside of the aforementioned box or manhole is filled with a filler material, The manhole or box rehabilitation structure according to claim 1 or 2, characterized in that the area around the connected joint and the rehabilitation pipe body is covered with the filler material.

9. A method for rehabilitating a manhole or basin equipped with an inlet and an outlet, A fitting step of fitting a fitting that is axially slidable into at least one of the inlet and the outlet, A rehabilitation pipe body introduction step involves introducing a rehabilitation pipe body equipped with a main body side inlet and a main body side outlet into the aforementioned box or manhole, A rehabilitation pipe body arrangement step involves arranging the rehabilitation pipe body such that the inlet and the main body side inlet, and the main body side outlet and the outlet face each other. A joint extension step in which the joint is slid toward the rehabilitation pipe body to extend it, A contact / proximity step is made to bring the end face of the joint opposite to the fitting side of the joint directly or indirectly into contact with or close to the end face of either the main body side inlet or the main body side outlet, A covering step in which the area around the contact portion or adjacent portion where the joint and the end face on the main body side abut is covered with a covering member, A method for rehabilitating a manhole or pit, characterized by directly or indirectly connecting the joint and the rehabilitation pipe body by performing the following.

10. After the rehabilitation pipe body placement step or the joint extension step is performed, a short pipe placement step is performed in which a short pipe is placed between the joint and the rehabilitation pipe body. The method for rehabilitating a manhole or box according to claim 9, characterized in that the contact and proximity step brings into contact the first short pipe end face formed on one end of the short pipe with the joint end face, and also brings into contact the second short pipe end face formed on the other end of the short pipe with the main body end face.

11. A positioning portion is provided at least one of the main body side inlet and main body side outlet of the rehabilitation pipe body, The method for rehabilitating a manhole or box according to claim 9 or 10, characterized in that, prior to the contact and proximity step, a positioning step is performed in which the positioning unit positions the joint end face and the main body side end face to face each other directly or indirectly.

12. After the coating step is performed, a filler filling step is performed in which filler material is filled into at least a part of the inside of the box or manhole. The method for rehabilitating a manhole or box according to claim 9 or 10, characterized in that the filling step involves covering the area around the connected joint and the rehabilitation pipe body with the filling material.

13. A method for constructing a rehabilitation structure for a manhole or basin equipped with an inlet and an outlet, A fitting step of fitting a fitting that is axially slidable into at least one of the inlet and the outlet, A rehabilitation pipe body introduction step involves introducing a rehabilitation pipe body equipped with a main body side inlet and a main body side outlet into the aforementioned box or manhole, A rehabilitation pipe body arrangement step involves arranging the rehabilitation pipe body such that the inlet and the main body side inlet, and the main body side outlet and the outlet face each other. A joint extension step in which the joint is slid toward the rehabilitation pipe body to extend it, A contact / proximity step is made to bring the end face of the joint opposite to the fitting side of the joint directly or indirectly into contact with or close to the end face of either the main body side inlet or the main body side outlet, A covering step in which the area around the contact portion or adjacent portion where the joint and the end face on the main body side abut is covered with a covering member, A method for constructing a rehabilitation structure for a manhole or box, characterized by constructing a rehabilitation structure for a manhole or box by performing the following steps.

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