JP2011179228A - Earthquake-resisting construction method for manhole connecting section of existing pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake-resisting construction method for a manhole connecting section of an existing pipe, which has proper workability, and which can impart sufficient strength to an alternative leading end portion of the existing pipe constituted in a leading end-removed portion of the existing pipe. <P>SOLUTION: The leading end portion of the existing pipe 2 fitted into a pipe hole 5 is cut off to a position within a range which does not go beyond an outer peripheral wall surface of a peripheral wall 4, near the outer peripheral wall surface; and a steel pipe 17 is inserted in a diameter-reduced state into a flexible tubular lining material 15 impregnated with an unhardened hardening resin. The tubular lining material, into which the steel pipe 17 is inserted, is inserted through the pipe hole 5, and disposed in the pipe hole 5 by having an end thereof inserted into the leading end of the existing pipe 2; a diameter of the steel pipe 17 inserted into the tubular lining material 15 is enlarged to expand the tubular lining material 15 in a cylindrical shape; and an end thereof is brought into pressure contact with an inner peripheral surface of the leading end of the existing pipe 2, so as to harden the tubular lining material 15. An elastically-deformable elastic cut-off pipe-like portion 20 is provided between an outer periphery of the tubular lining material 15 and an inner peripheral surface of the pipe hole 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides an anti-seismic work for an existing pipe manhole connection portion that performs non-cutting to make the existing pipe manhole connection portion that is fitted and connected to a pipe hole in a peripheral wall constituting the human hole. Regarding the law.

  Seismic facilities have been severely damaged by major earthquakes that occurred in the past, and the impact on citizens' lives was serious. Among them, damage to existing pipes caused damage, slipping out, slipping, cracking, etc., especially existing pipes were fitted and connected to the hole in the peripheral wall of the human hole. A lot of damage was seen in the existing pipe-hole connection. This is due to the fact that the existing pipe human hole connection part between the existing pipe and the human hole is rigidly joined, and therefore the existing pipe human hole connection part cannot absorb the difference in motion with respect to the earthquake motion.

  For this reason, the earthquake resistance of the existing pipe manhole connection part of the existing pipe and the manhole which became a rigid joint was calculated | required. Positioning the existing pipe fitted in the pipe hole on the peripheral wall of the human hole so that it does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall as a construction method to make the existing pipe human hole connection part rigidly connected. After cutting, the lining pipe is placed inside the existing pipe, and then the cut end portion of the existing pipe fitted to the pipe hole in the peripheral wall of the human hole is removed from the pipe hole, and the existing pipe is removed from the pipe hole. A construction method is disclosed in which an elastic water-stop tubular portion that can be elastically deformed is provided in the gap from which the tip portion is removed (see, for example, Patent Document 1).

  According to this construction method, since the tip portion of the existing pipe that is fitted in the hole of the peripheral wall of the human hole is excised from the inner peripheral wall surface side of the peripheral wall of the human hole within a range not exceeding the outer peripheral wall surface, It does not protrude outside the peripheral wall of the human hole, and therefore, the space between the outer peripheral wall surface of the peripheral wall of the human hole and the periphery of the existing pipe is in a closed state. The earth and sand outside the peripheral wall of the human hole can be prevented from flowing into the tube hole of the peripheral wall, and the inflow of water can be prevented or minimized, so that the work can be easily performed. Moreover, there is no possibility of damaging buried objects such as underground cables and various fluid buried pipes existing in the vicinity of the outer periphery of the peripheral wall of the human hole by the cutter.

  In addition, the lining pipe arranged inside the existing pipe serves as an existing pipe, and the lining pipe in the portion where the tip of the existing pipe is removed is fitted into the pipe hole of the peripheral wall of the human hole. Because it will constitute an alternative tip part, even if there is a break at the end of the existing pipe that is fitted in the pipe hole due to the difference in movement between the existing pipe and the peripheral wall of the human hole due to an earthquake, it is compensated with the lining pipe Therefore, there is no possibility of impairing the function as an existing pipe.

JP 2009-138433 A

However, in the earthquake resistance construction method of the existing pipe human hole connection part described in Patent Document 1 described above, only the lining pipe in the portion from which the tip part of the existing pipe is removed is fitted into the hole of the peripheral wall of the human hole. Although it constitutes an alternative tip part of the pipe, the lining pipe may not have the strength as an alternative tip part of every existing pipe.For example, if the existing pipe is a large-diameter pipe, It may be difficult to obtain the strength of an alternative tip portion of an existing pipe.
In addition, the lining pipe is usually placed inside the existing pipe by inserting a cylindrical lining material in a curable soft state into the existing pipe and inflating the cylindrical lining material by feeding air into the cylindrical lining material. Because the lining pipe is formed and arranged by pressing it against the inner wall of the existing pipe and curing it, equipment for inflating the cylindrical lining material is required, and the effort to inflate the cylindrical lining material Is forced to take such work.

  An object of the present invention is to provide an earthquake resistant construction method for an existing pipe manhole connecting portion that can obtain sufficient strength for an alternative tip portion of an existing pipe constituted by removing a tip portion of an existing pipe and that has good workability. It is to provide.

  In order to achieve the above-described object, the invention according to claim 1 is to provide an existing pipe for improving the earthquake resistance of an existing pipe human hole connecting portion in which the existing pipe is fitted and connected to a pipe hole of a peripheral wall of the human hole. It is a seismic construction method for a human hole connecting portion, and the tip portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is moved from the inner peripheral wall surface side of the peripheral wall of the human hole to the outer periphery of the peripheral wall. Cutting a steel pipe having a slit in the axial direction into a flexible cylindrical lining material impregnated with an uncured curable resin, and cutting to a position within the range not exceeding the outer peripheral wall surface in the vicinity of the wall surface The step of inserting the ends into a reduced diameter state, and the end portion of the tubular lining material into which the reduced diameter steel pipe is inserted through the tube hole from the inner peripheral side of the peripheral wall of the manhole Is inserted into the tip of the existing pipe and disposed in the pipe hole of the peripheral wall of the human hole, The diameter of the steel pipe inserted into the cylindrical lining material inserted into the tip of the existing pipe is expanded to expand the cylindrical lining material into a cylindrical shape, and the end of the steel lining is expanded to the inner peripheral surface of the tip of the existing pipe. The step of curing the cylindrical lining material by pressure contact, and the person at the portion where the outer periphery of the cylindrical lining material is pressed against the inner peripheral surface of the tip of the existing pipe and the tip of the existing pipe is cut off And a step of providing an elastic water-stopping tubular portion that can be elastically deformed between the peripheral wall of the hole and the inner peripheral surface of the tube hole.

  The invention according to claim 2 is an earthquake resistance construction method for an existing pipe human hole connection part that is intended to make the existing pipe human hole connection part seismically resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The tip portion of the existing pipe that is fitted in the tube hole of the peripheral wall of the human hole does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. A process of cutting to a position within the range, and a steel pipe having a slit in the axial direction in a flexible tubular lining material impregnated with an uncured curable resin, the slit ends are overlapped with each other in a reduced diameter state. A step of inserting, expanding the steel pipe inserted in a reduced diameter state into the cylindrical lining material, and expanding the cylindrical lining material into a cylindrical shape, the outer diameter of which is the inner diameter of the tip of the existing pipe A step of curing the cylindrical lining material that has a substantially the same diameter and a cylindrical shape; One end portion of the cylindrical lining material that is cylindrical and integrated with the steel pipe is used as an insertion portion that is inserted into the distal end portion of the existing pipe, and the cylindrical lining is disposed on the outer periphery of the cylindrical lining material excluding the insertion portion. A step of providing an elastically deformable elastic water-stop tubular portion that fluid-tightly seals between the outer periphery of the material and the inner peripheral surface of the tube hole of the peripheral wall of the human hole at a portion where the tip portion of the existing tube is cut off; The tubular lining material provided with the elastic water-stop tubular portion on the outer periphery passes through the tube hole from the inner peripheral side of the peripheral wall of the manhole, and the insertion portion is inserted into the tip of the existing tube, and the manhole And the step of disposing in the tube hole of the peripheral wall.

  The invention according to claim 3 is an earthquake resistance construction method for an existing pipe human hole connection part that is intended to make the existing pipe human hole connection part seismically resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The tip portion of the existing pipe that is fitted in the tube hole of the peripheral wall of the human hole does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. A step of cutting to a position within the range; and a tube hole of the peripheral wall of the human hole at a portion where the tip portion of the existing tube is cut, an outer diameter being an inner diameter of the tube hole, and an inner diameter being a tip of the existing tube A step of providing an elastically deformable elastic water stop tubular portion having substantially the same diameter as the inner diameter of the portion, and a slit in the axial direction in a flexible cylindrical lining material impregnated with an uncured curable resin Inserting the steel pipe as a state of reduced diameter by overlapping the slit ends, and the steel pipe reduced in diameter inside The inserted tubular lining material is passed from the inner peripheral side of the peripheral wall of the human hole into the elastic water-stop tubular portion provided in the pipe hole, and the end thereof is inserted into the tip of the existing pipe, A step of disposing the pipe in the peripheral wall of the hole, and expanding the diameter of the steel pipe inserted in the cylindrical lining material inserted in the tip of the existing pipe to expand the cylindrical lining material into a cylindrical shape. And the step of bringing the outer peripheral surface into pressure contact with the inner peripheral surface of the tip end portion of the existing pipe and the inner peripheral surface of the elastic water-stop tubular portion and curing the cylindrical lining material.

  According to a fourth aspect of the present invention, the inner wall of the tube hole of the human hole located around the tip portion to be cut off of the existing pipe according to any one of the first to third aspects is provided along the existing pipe. And a step of forming an annular cut-out portion in an annular shape coaxially with the existing pipe.

  The invention according to claim 5 is the one according to any one of claims 1 to 4, wherein after the existing pipe is cut off, the distal end portion fitted to the pipe hole of the peripheral wall of the human hole is cut off. Cutting the inner circumference of the tip in the circumferential direction to form a large-diameter inner circumference, and expanding the diameter of the steel pipe inserted into the cylindrical lining material to make the cylindrical lining material cylindrical When the cylindrical lining material and the steel pipe are integrated by inflating and curing the cylindrical lining material, the outer diameter of the cylindrical lining material is formed on the inner circumference of the tip of the existing pipe. The inner diameter of the steel pipe is approximately the same as the inner diameter of the small-diameter inner peripheral part inside the large-diameter inner peripheral part of the existing pipe.

  According to a sixth aspect of the present invention, after the excision of the tip portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole according to any one of the first to fifth aspects, The end surface of the existing pipe is cut out so as to be a substantially V-shaped concave surface along the arc of the outer peripheral wall of the human hole.

  According to the earthquake resistance construction method of the existing pipe manhole connection part according to claim 1, 2, 3, the steel pipe which is arranged in the pipe hole of the peripheral wall of the manhole and is in the part where the existing pipe is excised And the hardened cylindrical lining material constitutes an alternative tip portion of the existing pipe from which the tip portion has been removed, so that it is sufficient for the alternative tip portion of the existing pipe constituted by the steel pipe and the hardened cylindrical lining material. Since strength can be obtained, even if the end of an existing pipe is destroyed due to an earthquake, the steel pipe and the hardened tubular lining material can be used to sufficiently cover the broken part, and there is no risk of impairing the function of the existing pipe. . In particular, even if the existing pipe is a large-diameter pipe, it is possible to obtain sufficient strength commensurate with the existing pipe, and to sufficiently compensate for the broken portion. Moreover, since the difference in movement between the existing pipe and the peripheral wall of the human hole that occurs when an earthquake occurs can be absorbed by the elastic water-stop tubular part, it is possible to prevent the existing pipe human hole connection part from being destroyed by earthquake motion. it can.

  The cylindrical lining material integrated with the steel pipe is a flexible cylindrical lining material impregnated with an uncured curable resin, which is inserted into the cylindrical lining material. The cylindrical lining material is expanded in a cylindrical shape by expanding the diameter of the steel pipe that has slits in the axial direction and the slit ends overlap each other, and the cylindrical lining can be easily and easily operated. The material can be expanded into a cylindrical shape and integrated with the steel pipe.

  In addition, in a steel pipe for inflating a cylindrical lining material into a cylindrical shape, since it has a slit in the axial direction, for example, the diameter of the existing pipe is larger than the diameter of the opening serving as the entrance of the human hole. Even when the diameter of the steel pipe is larger than the diameter of the opening of the human hole so as to correspond to the existing pipe, the steel pipe can be made to have a reduced diameter by overlapping the slit ends. It can be easily carried into the inside from the opening of the hole.

  According to the seismic improvement method of the existing pipe human hole connecting part according to claim 4, the pipe of the human hole located around the tip portion of the existing pipe to be cut out according to any one of claims 1 to 3. Since it includes a step of forming an annular cut-out portion by annularly cutting the inner wall of the hole along the existing pipe and coaxially with the existing pipe, it is provided in the hole of the peripheral wall of the human hole in the portion where the tip portion of the existing pipe is cut off The outer diameter of the elastic water-stop tubular portion can be made larger by the amount of the annular cut-out portion, and the difference in motion between the existing pipe and the peripheral wall of the human hole that occurs when an earthquake occurs can be determined. Can absorb more effectively.

  According to the earthquake resistant construction method for an existing pipe human hole connecting part according to claim 5, the tip part fitted into the pipe hole of the peripheral wall of the human hole according to any one of claims 1 to 4 is provided. It includes a step of cutting the inner circumference of the tip after cutting the existing pipe in the circumferential direction to form a large-diameter inner circumference, and expanding the diameter of the steel pipe inserted into the cylindrical lining material to form a cylindrical lining When the cylindrical lining material and the steel pipe are integrated by inflating the material into a cylindrical shape and hardening the cylindrical lining material, the outer diameter of the cylindrical lining material is formed on the inner periphery of the tip of the existing pipe. Since the inner diameter of the steel pipe is approximately the same as the inner diameter of the small-diameter inner peripheral part inside the large-diameter inner peripheral part of the existing pipe, the cylindrical shape into which the steel pipe is inserted By inserting the end of the lining material into the large-diameter inner periphery formed at the tip of the existing pipe, Since the surface and the inner peripheral surface of the small-diameter inner peripheral portion of the existing pipe are flush with each other, the tubular lining material into which the steel pipe is inserted does not hinder the fluid flowing in the existing pipe, and can ensure a smooth flow. it can.

  According to the seismic improvement method of the existing pipe manhole connection part according to claim 6, the existing pipe fitted into the pipe hole of the peripheral wall of the manhole according to any one of claims 1 to 5. The tip portion is excised so that the end face of the existing pipe after the excision becomes a substantially V-shaped concave surface along the arc of the outer peripheral wall surface of the human hole. The portion of the existing pipe that is joined is small, and the length of the axial direction of the tube hole of the peripheral wall of the human hole in the portion where the tip portion of the existing pipe is excised can be secured. Since the elastic water-stop tubular portion provided in the hole of the peripheral wall of the human hole in the excised part can be lengthened in the axial direction, this causes the movement of the existing pipe and the peripheral wall of the human hole that occur when an earthquake occurs. The difference can be absorbed more effectively by the elastic water-stop tubular portion, and the water-stop effect is improved.

It is a longitudinal cross-sectional view which shows the state before construction in the process of the 1st example of implementation of the earthquake resistance construction method of the existing pipe manhole connection part which concerns on this invention. In the step of the first example of the implementation of the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, the tip portion of the existing pipe fitted to the pipe hole on the peripheral wall of the manhole is cut to form an annular cut portion It is a longitudinal cross-sectional view which shows the state which carried out. FIG. 3 is a cross-sectional view of FIG. 2. It is a cross-sectional view which shows the other example of the state which excised the front-end | tip part of the existing pipe | tube fitted to the pipe hole of the surrounding wall of a human hole, and formed the cyclic | annular cut part. It is a perspective view which shows the state which inserts a steel pipe as a diameter-reduced state in the cylindrical lining material which impregnated uncured curable resin at the process of the 1st example. It is explanatory drawing which shows the opening part end surface of the steel pipe made into the diameter-reduced state at the process of the 1st example. It is explanatory drawing which shows the opening part end surface of the steel pipe expanded in the process of the 1st example. In the process of the first example, a tubular lining material into which a steel pipe with a reduced diameter is inserted is passed through the pipe hole from the inner peripheral side of the peripheral wall of the human hole, and its end is inserted into the tip of the existing pipe. It is a longitudinal cross-sectional view which shows the state arrange | positioned in the pipe hole of the surrounding wall of a hole. The steel pipe inserted into the cylindrical lining material inserted at the tip of the existing pipe is expanded in diameter to expand the cylindrical lining material into a cylindrical shape, and the end is pressed against the inner peripheral surface of the tip of the existing pipe. It is a longitudinal cross-sectional view shown. It is explanatory drawing which shows an example of the means to expand a steel pipe and to expand a cylindrical lining material cylindrically. It is explanatory drawing which shows the opening part end surface of the steel pipe and cylindrical lining material which were united by the expanded steel pipe. It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part between the outer periphery of a cylindrical lining material, and the inner peripheral wall of the tube hole of the surrounding wall of a human hole. In the process of the second example of the implementation of the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, the diameter of the steel pipe inserted into the cylindrical lining material in a reduced diameter state is expanded to make the cylindrical lining material cylindrical It is a longitudinal cross-sectional view which shows the state swelled and integrated. It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part which can be elastically deformed in the outer periphery of the cylindrical lining material integrated with the steel pipe at the process of the 2nd example. In the process of 2nd example, it is a longitudinal cross-sectional view which shows the state which inserts the cylindrical lining material which provided the elastic water-stop tubular part in the outer periphery from the inner peripheral side of the surrounding wall of a human hole through the said pipe hole to the front-end | tip part of an existing pipe. is there. It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the cylindrical lining material which provided the elastic water stop tubular part in the outer periphery in the tube hole of the surrounding wall of a human hole at the process of the 2nd example. In the third example of the implementation of the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, an elastic water-stop tubular that can be elastically deformed to the hole in the peripheral wall of the human hole in the portion where the tip portion of the existing pipe is cut off It is a longitudinal cross-sectional view which shows the state which provided the part. In the process of the third example, the tubular lining material into which the reduced diameter steel pipe is inserted is passed through the pipe hole from the inner peripheral side of the peripheral wall of the human hole, and its end is inserted into the tip of the existing pipe. It is a longitudinal cross-sectional view which shows the state arrange | positioned in the pipe hole of a surrounding wall. In the process of the third example, the steel pipe is expanded to bring the outer peripheral surface of the cylindrical lining material into pressure contact with the inner peripheral surface of the tip end portion of the existing pipe and the inner peripheral surface of the elastic water blocking tubular portion, and the cylindrical lining material is cured. It is a longitudinal cross-sectional view shown.

  Hereinafter, the form for implementing the earthquake resistance construction method of the existing pipe manhole connection part which concerns on this invention is demonstrated in detail with reference to the Example shown on drawing.

  FIG. 1 to FIG. 12 show a first example of implementing the seismic retrofitting method for an existing pipe human hole connecting portion according to the present invention, FIG. 1 is a longitudinal sectional view showing a state before construction, and FIG. 2 is a human hole. Fig. 3 is a longitudinal sectional view showing a state in which an end portion of an existing pipe fitted into a tube hole of the peripheral wall is cut to form an annular cut portion, Fig. 3 is a cross-sectional view of Fig. 2, and Fig. 4 is a view of the peripheral wall of the human hole. FIG. 5 is a cross-sectional view showing another example of a state in which an end portion of an existing pipe fitted into a pipe hole is cut to form an annular cut portion, and FIG. 5 shows the inside of a cylindrical lining material impregnated with an uncured curable resin. Fig. 6 is a perspective view showing a state in which the steel pipe is inserted in a reduced diameter state, Fig. 6 is an explanatory view showing the opening end face of the steel pipe in the reduced diameter state, and Fig. 7 is an explanatory view showing the opening end face of the expanded steel pipe. 8 shows a tubular lining material into which a steel pipe having a reduced diameter is inserted, through the hole from the inner peripheral side of the peripheral wall of the human hole, and its end is used as the tip of the existing pipe. FIG. 9 is a longitudinal sectional view showing a state where the steel pipe is inserted into the peripheral hole of the human hole, and FIG. 9 shows the cylindrical lining by expanding the diameter of the steel pipe inserted into the cylindrical lining material inserted at the tip of the existing pipe. FIG. 10 (A) and FIG. 10 (B) show a state in which the material is inflated into a cylindrical shape and its end is pressed against the inner peripheral surface of the tip of the existing pipe. FIGS. FIG. 11 is an explanatory view showing an example of a means for inflating in a cylindrical shape, FIG. 11 is an explanatory view showing an opening end face of a steel pipe and a cylindrical lining material integrated with an expanded steel pipe, and FIG. 12 is an outer periphery of the cylindrical lining material. It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part between the internal peripheral walls of the pipe hole of the peripheral wall of a human hole.

  FIG. 1 shows an example of a manhole (manhole) for carrying out the construction method of this example. As shown in the figure, the existing pipe 2 laid in the ground 1 in the state before construction is a manhole. 3, an existing pipe human hole connecting portion 6 is formed by being inserted into and connected to the pipe hole 5 of the basic peripheral wall portion 4a of the human hole 3. The manhole 3 is formed with a concrete peripheral wall 4b formed in advance on a foundation peripheral wall 4a constructed of concrete to form a peripheral wall 4, and an upper end opening 7 can be opened and closed with a lid 8. It is blocked.

  As shown in FIG. 2, first, the seismic retrofit method for the existing pipe human hole connecting portion 6 having such a structure is fitted into the pipe hole 5 of the basic peripheral wall portion 4 a in the peripheral wall 4 of the human hole 3. The front end portion 2 a of the existing pipe 2 is cut from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4 a to a position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10.

  The vicinity of the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a means that the existing tube remaining in the state of being fitted in the tube hole 5 of the basic peripheral wall portion 4a after the distal end portion 2a of the existing tube 2 is excised. The end 2b of 2 is a position where the existing pipe 2 and the basic peripheral wall 4a of the human hole 3 can be cut off easily when an earthquake occurs. The length L of the existing pipe 2 remaining in the state of being fitted in the tube hole 5 of the basic peripheral wall portion 4a after excision of the distal end portion of the existing pipe 2 is preferably about 0 to 5 cm. In order to prevent inflow of earth and sand and water, it is especially preferable that it is 0.5 cm or more. When setting the excision dimension position P of the distal end portion 2a of the existing pipe 2, the base peripheral wall portion 4a is driven in the field, and the wall thickness is not necessarily as designed. It is preferable to measure by applying ultrasonic waves and set the resection dimension position P of the distal end portion 2a of the existing pipe 2.

  Further, in excision of the distal end portion 2a of the existing pipe 2 fitted in the pipe hole 5 of the basic peripheral wall portion 4a of the human hole 3, the end surface of the existing pipe 2 after excision is as shown in FIG. May be excised so as to be in the same plane, or as shown in FIG. 4, it may be excised so as to be a substantially V-shaped concave surface along the arc of the outer peripheral wall surface of the human hole 3.

  Furthermore, in this example, the inner wall of the tube hole 5 of the basic peripheral wall portion 4a located around the tip portion 2a to be cut off of the existing pipe 2 is cut out in an annular manner coaxially with the existing pipe 2 along the existing pipe 2. Part 11 is formed. The excision of the distal end portion 2a of the existing pipe 2 and the excision of the inner wall of the tube hole 5 may be excised at the same time, or one of them may be excised first, and then the other may be excised.

  Moreover, in this example, the inner periphery of the front-end | tip part of the existing pipe 2 which cut off the front-end | tip part 2a fitted to the pipe hole 5 of the basic | foundation peripheral wall part 4a of the human hole 3 is an integrated steel pipe as described later. Then, a large diameter inner peripheral portion 12 is formed by cutting in the circumferential direction by a thickness substantially corresponding to the thickness of the cylindrical lining material. That is, the outer diameter of the cylindrical lining material integrated with the steel pipe is approximately the same as the inner diameter of the large-diameter inner peripheral portion 12 formed at the distal end portion of the existing pipe 2, and the inner diameter of the steel pipe and the existing pipe 2 The inner circumference of the distal end portion of the existing pipe 2 having the distal end portion 2a removed so as to be approximately the same diameter as the inner diameter of the smaller inner diameter portion 13 inside the larger inner diameter portion 12 is cut in the circumferential direction.

  Prior to excision of the distal end portion 2a of the existing pipe 2, a working space necessary for excision of the distal end portion of the existing pipe 2 and a fitting portion of the cylindrical auxiliary member are fitted into the annular excision portion 11 as described later. In order to secure the working space to be fixed together, the invert concrete 14 on the front surface of the tip portion 2a of the existing pipe 2 is cut out only in a necessary range.

  Next, as shown in FIG. 5, a flexible cylindrical lining material 15 impregnated with an uncured curable resin and a steel pipe 17 having slits 16 in the axial direction are prepared. A steel pipe 17 in which the slit end portions 16a and 16b are overlapped and reduced in diameter is inserted.

  The cylindrical lining material 15 is set so that its outer diameter is substantially the same as the inner diameter of the distal end portion of the existing pipe 2 after the distal end portion 2a is cut off when it is inflated into a cylindrical shape. It is made of a fibrous material such as felt or woven cloth that can be impregnated with an uncured curable resin. Examples of the curable resin impregnated into the cylindrical lining material 15 include a thermosetting resin, a photocurable resin, and a room temperature curable resin.

  Further, the outer diameter of the steel pipe 17 is set to a diameter that presses the cylindrical lining material 15 against the inner peripheral surface of the tip end portion of the existing pipe 2. The steel pipe 17 has a reduced diameter by overlapping the slit end portions 16a and 16b. In this example, when the slit end portions 16a and 16b are overlapped, the inner surface of the slit end portion 16a that is overlapped inside. Further, when the diameter of the steel pipe 17 in the reduced diameter state is increased, a backing auxiliary plate 18 that is brought into contact with the inner surface of the slit end portion 16b that is overlapped on the outside is fixed by welding or the like (FIGS. 6 and 7). . The steel pipe 17 is preferably made of stainless steel.

  In this example, the diameter of the steel pipe 17 inserted into the cylindrical lining material 15 is expanded to expand the cylindrical lining material 15 into a cylindrical shape, and the cylindrical lining material 15 is cured by curing of the curable resin. And the steel pipe 17 are integrated with each other, the outer diameter of the cylindrical lining material 15 is substantially the same as the inner diameter of the large-diameter inner peripheral portion 12 formed on the inner periphery of the distal end portion of the existing pipe 2, and the inner diameter of the steel pipe 17 is It is set so as to be substantially the same shape as the inner diameter of the small-diameter inner peripheral portion 13 inside the large-diameter inner peripheral portion 12 of the existing pipe 2.

  Next, as shown in FIG. 8, the tubular lining material 15 into which the reduced diameter steel pipe 17 is inserted is passed through the tube hole 5 from the inner peripheral side of the basic peripheral wall portion 4 a of the human hole 3, and the end portion thereof is It is inserted into the distal end portion of the existing pipe 2 and placed in the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3.

  Next, as shown in FIG. 9, the tubular lining material 15 is made cylindrical by expanding the diameter of the steel pipe 17 that is inserted into the cylindrical lining material 15 inserted in the tip portion of the existing pipe 2 and in a reduced diameter state. Inflate, press the end of the existing pipe 2 into the inner peripheral surface of the tip, in this example, the inner peripheral surface of the large-diameter inner peripheral portion 12, and cure the uncured curable resin impregnated in the cylindrical lining material 15 By doing so, the cylindrical lining material 15 is cured. In this example, the adhesive is applied to the inner peripheral surface of the large-diameter inner peripheral portion 12 of the existing pipe 2 before the end portion of the cylindrical lining material 15 is pressed against the inner peripheral surface of the large-diameter inner peripheral portion 12 of the existing pipe 2. Is applied.

  Further, in expanding the diameter of the steel pipe 17 in the reduced diameter state, the diameter expansion jig 19 for pushing the steel pipe 17 is used to expand the diameter of the steel pipe 17 in the reduced diameter state as shown in FIG. The tool 19 is inserted, and the diameter of the steel pipe 17 is increased by expanding the diameter expanding jig 19 and expanding the steel pipe 17 as shown in FIG.

  Next, as shown in FIG. 12, the outer periphery of the cylindrical lining material 15 whose end is pressed against the inner peripheral surface of the tip portion of the existing tube 2 and the foundation of the human hole 3 at the portion where the tip portion of the existing tube 2 is cut off. An elastic water-stop tubular portion 20 that is elastically deformable is provided in a liquid-tight manner between the inner peripheral wall of the tube hole 5 of the peripheral wall portion 4a.

  The elastic water-stop tubular portion 20 is formed using an elastic water-stopping material such as a water expansion rubber, a chemical conversion rubber, or a natural rubber containing a soft resin such as silicon resin or soft epoxy urethane, or a water absorbing material. As a means for providing the elastic water-stop tubular portion 20, the elastic water-stop tubular portion 20 may be formed by an elastic water-stop material, and the elastic water-stop tubular portion 20 may be inserted or provided. An elastic water-stopping tubular portion 20 may be formed by injecting an elastic water-stopping material between the outer periphery and the inner peripheral wall of the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3, or the elastic water-stopping tubular portion. 20 may be divided into a plurality of parts in the axial direction and assembled in a tubular shape within the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3.

  In this example, a joint material 21 is interposed between the tip of the existing pipe 2 and one end of the elastic water-stop tubular portion 20, and the outer periphery of the cylindrical lining material 15 that opens to the inner peripheral wall surface 9. And a space formed between the inner peripheral wall of the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 and an elastic sealing material via a joint material 21 between the other end portion of the elastic water-stop tubular portion 20 22 is filled.

  Thereafter, the filler 23 is filled in the cut portion of the invert concrete 14 in front of the tip portion of the existing pipe 2 that has been cut prior to cutting the tip portion of the existing pipe 2. The filler 23 is not particularly limited. In this example, an elastic material is used as the filler 23. As this elastic material, you may use the elastic water stop material which forms the elastic water stop tubular part 20, for example. Further, the cut portion of the invert concrete 14 is filled and leveled with a filler 23 such as resin or mortar. In this way, the process of implementing the seismic retrofitting method for the existing pipe manhole connection is completed.

  In the drawing, the seismicization of the existing pipe manhole connection portion 6 is shown in the drawing as a process of making the existing pipe manhole connection portion 6 on the right side of the figure seismic. The connection portion 6 is also made earthquake resistant in the same process as described above.

  According to the earthquake resistance construction method for the existing pipe manhole connection portion, the tip portion 2a of the existing pipe 2 fitted in the pipe hole 5 is located near the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a. Therefore, the cutter does not protrude outside the base peripheral wall portion 4a, so that the space between the peripheral wall surface 10 of the base peripheral wall portion 4a and the surrounding of the existing pipe 2 is closed. It is possible to prevent earth and sand outside the foundation peripheral wall portion 4a from flowing between the outer peripheral wall surface 10 and the periphery of the existing pipe 2 into the pipe hole 5 and to prevent the inflow of water. The work can be performed easily, and the cutter can damage underground objects such as underground cables and various buried pipes for fluids that exist in the vicinity of the outer periphery of the foundation peripheral wall 4a. There is no fear of attaching.

  Further, a steel pipe 17 in which the slit end portions 16a and 16b are overlapped and reduced in diameter is inserted into a flexible cylindrical lining material 15 impregnated with uncured curable resin, and the steel pipe 17 is inserted. The lining material 15 is inserted through the tube hole 5 from the inner peripheral side of the basic peripheral wall portion 4 a of the human hole 3, and its end is inserted into the large-diameter inner peripheral portion 12 at the tip of the existing tube 2 and disposed in the tube hole 5. Then, the diameter of the steel pipe 17 inserted into the cylindrical lining material 15 is expanded to expand the cylindrical lining material 15 into a cylindrical shape, and the end portion of the inner peripheral surface of the tip portion of the existing pipe, that is, the large-diameter inner peripheral portion 12 is expanded. Since the cylindrical lining material 15 is hardened by being brought into pressure contact with the inner peripheral surface, the integrated steel pipe 17 and the hardened cylindrical lining material 15 constitute an alternative tip portion of the existing tube 2 from which the tip portion 2a is removed. Therefore, the steel pipe 17 and the hardened cylindrical lining material 15 It becomes capable of obtaining a sufficient strength to alternative tip portion of the composed existing pipe 2.

  Thereby, even if the end portion of the existing pipe 2 is broken due to an earthquake, the broken portion can be sufficiently supplemented by the steel pipe 17 and the hardened tubular lining material 15, and there is no possibility of impairing the function as the existing pipe 2. In particular, even if the existing pipe 2 is a large-diameter pipe, a sufficient strength commensurate with the existing pipe 2 can be obtained, and the broken portion can be sufficiently compensated.

  Further, the inner periphery of the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 at the outer periphery of the cylindrical lining material 15 whose end portion is in pressure contact with the inner peripheral surface of the distal end portion of the existing tube 2 and the distal end portion of the existing tube 2 is cut off. Since the elastic water-stop tubular portion 20 that can be elastically deformed is provided between the surface and the surface, the difference in movement between the existing pipe 2 and the basic peripheral wall portion 4a of the human hole 3 that occurs when an earthquake occurs is shown. It is possible to prevent the existing pipe manhole connection portion 6 from being destroyed by the earthquake motion.

  Moreover, in this example, the inner wall of the tube hole 5 of the human hole 3 located around the distal end portion 2a of the existing tube 2 is cut out in a ring shape coaxially with the existing tube 2 along the existing tube 2. 11 is formed, the outer diameter of the elastic water-stop tubular portion 20 provided in the tube hole 5 of the human hole 3 in the portion where the distal end portion 2a of the existing tube 2 is cut is made larger by the amount of the annular cut portion 11. Thus, the difference in movement between the existing pipe 2 and the basic peripheral wall portion 4a of the human hole 3 that occurs when an earthquake occurs can be more effectively absorbed by the elastic water-stop tubular portion 20.

  Further, in this example, the distal end portion 2 a fitted into the tube hole 5 of the basic peripheral wall portion 4 a of the human hole 3 is cut off so that the end surface of the existing pipe 2 after the cutting is an arc of the outer peripheral wall surface 10 of the human hole 3. Since it is excised so as to form a substantially V-shaped concave surface, the portion of the existing tube 2 that is fitted into the tube hole 5 of the human hole 3 after the excision is slight, and the tip portion 2a of the existing tube 2 is removed. The length of the axial direction of the tube hole 5 of the human hole 3 in the excised part can be secured long, and an elastic water stop pipe provided in the pipe hole 5 of the human hole 3 in the excised part of the tip part 2a of the existing pipe 2 Since the shape part 20 can be lengthened in the axial direction, the difference in movement between the existing pipe 2 and the basic peripheral wall part 4a of the human hole 3 caused by the occurrence of an earthquake is further improved by the elastic water-stop tubular part 20. Can be absorbed.

  Moreover, in this example, the inner periphery of the front-end | tip part of the existing pipe 2 which cut off the front-end | tip part 2a fitted to the pipe hole 5 of the basic | foundation peripheral wall part 4a of the human hole 3 is an integrated steel pipe as described later. 17 and the cylindrical lining material 15 are cut in the circumferential direction by a thickness substantially corresponding to the thickness of the cylindrical lining material 15 to form the large-diameter inner peripheral portion 12, that is, the cylindrical lining material 15 integrated with the steel pipe 17. The outer diameter is approximately the same as the inner diameter of the large-diameter inner peripheral portion 12 formed at the distal end portion of the existing pipe 2 after excision, and the inner diameter of the steel pipe 17 is smaller than the inner diameter of the large-diameter inner peripheral portion 12 of the existing pipe 2. Since the inner circumference of the distal end portion of the existing pipe 2 with the distal end portion 2a cut away so as to be approximately the same diameter as the inner diameter of the circumferential portion 13 is cut in the circumferential direction, the end of the tubular lining material 15 into which the steel pipe 17 is inserted The inner peripheral surface of the steel pipe 17 and the existing pipe are inserted into the large-diameter inner peripheral part 12 formed at the tip of the existing pipe 2. The inner peripheral surface of the small-diameter inner peripheral portion 13 is flush, and the cylindrical lining material 15 into which the steel pipe 17 is inserted does not hinder the fluid flowing in the existing pipe 2 and can ensure a smooth flow. .

  In carrying out the seismic retrofitting method for the existing pipe manhole connection portion, in the cylindrical lining material 15 integrated with the steel pipe 17, the flexible cylindrical lining material 15 impregnated with an uncured curable resin is used. The cylindrical lining material 15 is expanded in a cylindrical shape by expanding the diameter of the steel pipe 17 that is inserted therein and has slits 16 in the axial direction and the slit ends 16a and 16b are overlapped with each other. The cylindrical lining material 15 can be easily inflated into a cylindrical shape and integrated with the steel pipe 17 by a simple operation.

  Further, since the steel pipe 17 has the slit 16 in the axial direction, for example, the diameter of the existing pipe 2 is larger than the diameter of the opening 7 of the human hole 3, and the diameter of the steel pipe 17 is also the existing pipe. Even when the diameter of the opening 7 of the human hole 3 is larger than the diameter of the opening 7 so as to correspond to 2, the steel pipe 17 is made to be human by overlapping the slit ends 16 a and 16 b and reducing the diameter. It can be easily carried into the inside from the opening 7 of the hole 3.

FIGS. 13 to 16 show a second example in which the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention is carried out. FIG. 13 shows a steel pipe inserted into a tubular lining material in a reduced diameter state. 14 is a longitudinal sectional view showing a state in which the diameter of the cylindrical lining material is expanded and integrated into a cylindrical shape, and FIG. 14 is provided with an elastic water-stop tubular portion that can be elastically deformed on the outer periphery of the cylindrical lining material integrated with the steel pipe. FIG. 15 shows a state in which a tubular lining material provided with an elastic water-stop tubular portion on the outer periphery is inserted from the inner peripheral side of the peripheral wall of the human hole into the distal end portion of the existing pipe through the tube hole. FIG. 16 is a longitudinal sectional view showing a state in which a cylindrical lining material provided with an elastic water-stop tubular portion on the outer periphery is disposed in a tubular hole of a peripheral wall of a human hole.
In this example, the same steps as those in the first example are omitted with the aid of the drawing of the first example.
The manhole for carrying out the construction method of this example is the same as the manhole shown in FIG. 1 for carrying out the first example, and the description is omitted with the aid of this figure.

  The seismic retrofitting method of the present example performed on the existing pipe human hole connecting portion 6 having the structure shown in FIG. 1 is first established in the existing pipe fitted in the pipe hole 5 of the basic peripheral wall portion 4a in the peripheral wall 4 of the human hole 3. The two distal end portions 2a are excised from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a to a position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10.

  Also in this example, as in the first example, the inner wall of the tube hole 5 of the basic peripheral wall portion 4a located around the tip portion 2a to be excised from the existing pipe 2 is coaxial with the existing pipe 2 along the existing pipe 2. To form an annular cut portion 11. Further, in the excision of the distal end portion 2a of the existing pipe 2 fitted into the pipe hole 5 of the basic peripheral wall portion 4a of the human hole 3, the existing pipe 2 after excision is cut in the same manner as in the first example. The end surface may be cut out so as to be flush with the first plane as shown in FIG. 3 of the first example, or substantially V-shaped along the arc of the outer peripheral wall surface of the human hole 3 as shown in FIG. 4 of the first example. You may cut out so that it may become a concave surface.

Also in this example, as in the first example, the inner circumference of the distal end portion of the existing pipe 2 obtained by excising the distal end portion 2a fitted in the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 will be described later. However, the large-diameter inner peripheral portion 12 is formed by cutting in the circumferential direction by a thickness substantially corresponding to the thickness of the integrated steel pipe and cylindrical lining material. That is, the outer diameter of the cylindrical lining material integrated with the steel pipe is approximately the same as the inner diameter of the large-diameter inner peripheral portion 12 formed at the distal end portion of the existing pipe 2, and the inner diameter of the steel pipe and the existing pipe 2 The inner circumference of the distal end portion of the existing pipe 2 having the distal end portion 2a removed so as to be approximately the same diameter as the inner diameter of the smaller inner diameter portion 13 inside the larger inner diameter portion 12 is cut in the circumferential direction.
Since this process is the same as the first example described above, the description of FIG. 2, FIG. 3, FIG. 4 and the first example of the first example is used, and detailed description of this process is omitted.

Next, similarly to the first example, the flexible cylindrical lining material 15 impregnated with the uncured curable resin shown in FIG. 5 of the first example and the shaft shown in FIGS. 6 and 7 of the first example. A steel pipe 17 having a slit 16 in the direction is prepared, and the steel pipe 17 in which the slit end portions 16 a and 16 b are overlapped and reduced in diameter is inserted into the cylindrical lining material 15.
Since the cylindrical lining material 15 and the steel pipe 17 are the same as the first example, the description of the first example is used.

  Next, the diameter of the steel pipe 17 inserted into the cylindrical lining material 15 in a reduced diameter state is increased using the same means as in the first example shown in FIG. 10, and the cylindrical lining material 15 is expanded into a cylindrical shape. The outer diameter is set to be approximately the same as the inner diameter of the distal end portion of the existing pipe 2, and the cylindrical lining material 15 is cured (FIG. 13).

  Next, as shown in FIG. 14, one end portion of the cylindrical lining material 15 that is cylindrical and integrated with the steel pipe 17 is used as an insertion portion 15 a that is inserted into the distal end portion of the existing pipe 2, and the cylindrical lining material 15 is inserted. On the outer periphery excluding the portion 15a, the space between the outer periphery of the cylindrical lining material 15 and the inner peripheral surface of the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 in the portion where the tip portion 2a of the existing tube 2 is cut off is liquid-tight. An elastic water-stopping tubular portion 20 that can be elastically deformed is provided. In the elastic water-stop tubular portion 20, as in the first example, for example, an elastic water-stop material such as a water expansion rubber, a chemical conversion rubber, or a natural rubber containing a soft resin such as silicon resin or soft epoxy urethane, or a water absorbing material. It is molded using.

  Next, as shown in FIG. 15, the tubular lining material 15 provided with the elastic water-stop tubular portion 20 on the outer periphery passes through the tube hole 5 of the basic peripheral wall portion 4 a of the human hole 3, and the insertion portion 15 a is connected to the existing pipe 2. It inserts in a front-end | tip part and arrange | positions in the pipe hole 5 of the basic | foundation surrounding wall part 4a of the human hole 3, as shown in FIG. In this example, an adhesive is applied to the inner peripheral surface of the large-diameter inner peripheral portion 12 of the existing pipe 2 before the insertion portion 15 a of the cylindrical lining material 15 is inserted into the distal end portion of the existing pipe 2.

  Further, in this example, joint materials 21 are provided on both ends of the elastic water-stop tubular portion 20 on the outer periphery of the tubular lining material 15. In addition, after the cylindrical lining material 15 provided with the elastic water-stop tubular portion 20 is disposed in the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3, the outer periphery of the cylindrical lining material 13 opened to the inner peripheral wall surface 9 In a space formed between the inner peripheral wall of the tube hole 5 of the basic peripheral wall portion 4 a of the human hole 3, an elastic sealing material 22 is interposed between the other end portion of the elastic water-stop tubular portion 20 via a joint material 21. Filled.

  Thereafter, similarly to the first example, the filler 23 is filled in the cut portion of the invert concrete 14 in front of the tip portion of the existing pipe 2 that has been cut prior to cutting the tip portion of the existing pipe 2. The filler 23 is not particularly limited. In this example, an elastic material is used as the filler 23. As this elastic material, you may use the elastic water stop material which forms the elastic water stop tubular part 20, for example. Further, the cut portion of the invert concrete 14 is filled and leveled with a filler 23 such as resin or mortar. In this way, the process of implementing the seismic retrofitting method for the existing pipe manhole connection is completed.

  In the drawing, the seismicization of the existing pipe manhole connection portion 6 is shown in the drawing as a process of making the existing pipe manhole connection portion 6 on the right side of the figure seismic. The connection portion 6 is also made earthquake resistant in the same process as described above.

  According to the seismic retrofitting method for the existing pipe manhole connection part of the second example, the function and effect are the same as those of the first example, so the explanation of the first example is cited.

FIGS. 17 to 19 show a third example of implementing the seismic retrofitting method for the existing pipe human hole connection portion according to the present invention, and FIG. 17 shows the peripheral wall of the human hole in the portion where the tip portion of the existing pipe is cut off. Fig. 18 is a longitudinal sectional view showing a state in which an elastic water-stopping tubular portion that can be elastically deformed is provided in the tube hole. FIG. 19 is a longitudinal sectional view showing a state in which the end portion is inserted into the distal end portion of the existing pipe through the hole and disposed in the pipe hole of the peripheral wall of the human hole, and FIG. It is a longitudinal cross-sectional view which shows the state which was made to press-contact the inner peripheral surface of the front-end | tip part of an existing pipe, and the inner peripheral surface of an elastic water-stop tubular part, and hardened the cylindrical lining material.
In this example, the same steps as those in the first example are omitted with the aid of the drawing of the first example.
The manhole for carrying out the construction method of this example is the same as the manhole shown in FIG. 1 for carrying out the first example, and the description is omitted with the aid of this figure.

  The seismic retrofitting method of the present example performed on the existing pipe human hole connecting portion 6 having the structure shown in FIG. 1 is first established in the existing pipe fitted in the pipe hole 5 of the basic peripheral wall portion 4a in the peripheral wall 4 of the human hole 3. The two distal end portions 2a are excised from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a to a position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10.

  Also in this example, as in the first example, the inner wall of the tube hole 5 of the basic peripheral wall portion 4a located around the tip portion 2a to be excised from the existing pipe 2 is coaxial with the existing pipe 2 along the existing pipe 2. To form an annular cut portion 11. Further, in the excision of the distal end portion 2a of the existing pipe 2 fitted into the pipe hole 5 of the basic peripheral wall portion 4a of the human hole 3, the existing pipe 2 after excision is cut in the same manner as in the first example. The end surface may be cut out so as to be flush with the first plane as shown in FIG. 3 of the first example, or substantially V-shaped along the arc of the outer peripheral wall surface of the human hole 3 as shown in FIG. 4 of the first example. You may cut out so that it may become a concave surface.

Also in this example, as in the first example, the inner circumference of the distal end portion of the existing pipe 2 obtained by excising the distal end portion 2a fitted in the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 will be described later. However, the large-diameter inner peripheral portion 12 is formed by cutting in the circumferential direction by a thickness substantially corresponding to the thickness of the integrated steel pipe and cylindrical lining material. That is, the outer diameter of the cylindrical lining material integrated with the steel pipe is approximately the same as the inner diameter of the large-diameter inner peripheral portion 12 formed at the distal end portion of the existing pipe 2, and the inner diameter of the steel pipe and the existing pipe 2 The inner circumference of the distal end portion of the existing pipe 2 having the distal end portion 2a removed so as to be approximately the same diameter as the inner diameter of the smaller inner diameter portion 13 inside the larger inner diameter portion 12 is cut in the circumferential direction.
Since this process is the same as the first example described above, the description of FIG. 2, FIG. 3, FIG. 4 and the first example of the first example is used, and detailed description of this process is omitted.

Next, as shown in FIG. 17, the outer diameter is set to the inner diameter of the tube hole 5 and the inner diameter is set to the tube hole 5 of the basic peripheral wall portion 4 a of the human hole 3 in the portion where the tip portion 2 a of the existing tube 2 is cut. An elastic water-stopping tubular portion 20 that is elastically deformable and has the same diameter as the inner diameter of the distal end portion of the tube 2 is provided. In the elastic water-stop tubular portion 20, as in the first example, for example, an elastic water-stop material such as a water expansion rubber, a chemical conversion rubber, or a natural rubber containing a soft resin such as silicon resin or soft epoxy urethane, or a water absorbing material. It is molded using.
In this example, joint materials 21 are provided between the tip of the existing pipe 2 and one end of the elastic water-stop tubular portion 20 and at the other end of the elastic water-stop tubular portion 20.

Next, similarly to the first example, the flexible cylindrical lining material 15 impregnated with the uncured curable resin shown in FIG. 5 of the first example and the shaft shown in FIGS. 6 and 7 of the first example. A steel pipe 17 having a slit 16 in the direction is prepared, and the steel pipe 17 in which the slit end portions 16 a and 16 b are overlapped and reduced in diameter is inserted into the cylindrical lining material 15.
Since the cylindrical lining material 15 and the steel pipe 17 are the same as the first example, the description of the first example is used.

  Next, as shown in FIG. 18, an elastic water stop pipe in which a tubular lining material 15 into which a reduced diameter steel pipe 17 is inserted is provided in the pipe hole 5 from the inner peripheral side of the basic peripheral wall portion 4 a of the human hole 3. The end portion is inserted into the distal end portion of the existing tube 2 through the inside of the shaped portion 20, and is disposed in the tube hole 5 of the basic peripheral wall portion 4 a of the human hole 3.

  Next, as shown in FIG. 19, the steel pipe 17 in the reduced diameter state inserted into the cylindrical lining material 15 inserted in the tip portion of the existing pipe 2 is used as in the first example shown in FIG. The uncured curable resin impregnated in the cylindrical lining material 15 is made to expand in diameter, and the outer peripheral surface thereof is brought into pressure contact with the inner peripheral surface of the distal end portion of the existing pipe 2 and the inner peripheral surface of the elastic water-stop tubular portion 20. The cylindrical lining material 15 is cured by curing. In this example, the adhesive is applied to the inner peripheral surface of the large-diameter inner peripheral portion 12 of the existing pipe 2 before the end portion of the cylindrical lining material 15 is pressed against the inner peripheral surface of the large-diameter inner peripheral portion 12 of the existing pipe 2. Is applied.

  Further, in this example, the outer peripheral surface of the cylindrical lining material 15 is brought into pressure contact with the inner peripheral surface of the tip end portion of the existing pipe 2 and the inner peripheral surface of the elastic water-stop tubular portion 20, and after the cylindrical lining material 15 is cured, In the space formed between the outer periphery of the cylindrical lining material 15 opening in the wall surface 9 and the inner peripheral wall of the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3, the other end portion of the elastic water-stop tubular portion 20 and In between, the elastic sealing material 22 is filled through the joint material 21.

  Thereafter, similarly to the first example, the filler 23 is filled in the cut portion of the invert concrete 14 in front of the tip portion of the existing pipe 2 that has been cut prior to cutting the tip portion of the existing pipe 2. The filler 23 is not particularly limited. In this example, an elastic material is used as the filler 23. As this elastic material, you may use the elastic water stop material which forms the elastic water stop tubular part 20, for example. Further, the cut portion of the invert concrete 14 is filled and leveled with a filler 23 such as resin or mortar. In this way, the process of implementing the seismic retrofitting method for the existing pipe manhole connection is completed.

  In the drawing, the seismicization of the existing pipe manhole connection portion 6 is shown in the drawing as a process of making the existing pipe manhole connection portion 6 on the right side of the figure seismic. The connection portion 6 is also made earthquake resistant in the same process as described above.

  According to the seismic retrofitting method for the existing pipe manhole connection part of the third example, the function and effect are the same as those of the first example described above, so the explanation of the first example is cited.

DESCRIPTION OF SYMBOLS 1 Ground 2 Existing pipe 2a Tip part 2b End part 2c End surface 3 Human hole 4 Circumferential wall 4a Foundation peripheral wall part 4b Molding peripheral wall part 5 Pipe hole 6 Existing pipe human hole connection part 7 Opening part 8 Lid 9 Inner peripheral wall face 10 Outer peripheral wall face 11 Cutting part 12 Large diameter inner peripheral part 13 Small diameter inner peripheral part 14 Invert concrete 15 Tubular lining material 15a Insertion part 16 Slit 16a, 16b Slit end part 17 Steel pipe 18 Backing auxiliary plate 19 Diameter expansion jig 20 Elastic water stop tubular part 21 Joint material 22 Elastic sealing material 23 Filler

Claims (6)

A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The tip portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole is within a range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting to a position,
In a flexible cylindrical lining material impregnated with an uncured curable resin, a step of inserting a steel pipe having a slit in the axial direction with the slit ends overlapped with each other in a reduced diameter state;
The tubular lining material into which the steel pipe having a reduced diameter is inserted is inserted from the inner peripheral side of the peripheral wall of the human hole through the pipe hole, and an end thereof is inserted into the tip of the existing pipe, and the human hole A step of disposing in the tube hole of the peripheral wall of
The steel pipe inserted into the cylindrical lining material inserted into the tip of the existing pipe is expanded in diameter to inflate the cylindrical lining material into a cylindrical shape, and its end is directed to the inner peripheral surface of the tip of the existing pipe Curing the cylindrical lining material by pressure contact;
Between the outer periphery of the tubular lining material in which the end portion is in pressure contact with the inner peripheral surface of the tip of the existing tube and the inner peripheral surface of the tube hole of the peripheral wall of the human hole at a portion where the tip of the existing tube is cut off And a step of providing an elastic water-stopping tubular portion that can be elastically deformed to a seismic resistance construction method for an existing pipe manhole connection portion. A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The tip portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole is within a range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting to a position,
In a flexible cylindrical lining material impregnated with an uncured curable resin, a step of inserting a steel pipe having a slit in the axial direction with the slit ends overlapped with each other in a reduced diameter state;
The steel pipe inserted into the cylindrical lining material in a reduced diameter state is expanded to expand the cylindrical lining material into a cylindrical shape, and the outer diameter thereof is approximately the same as the inner diameter of the tip of the existing pipe. A step of curing the cylindrical lining material,
One end portion of the cylindrical lining material that is cylindrical and integrated with the steel pipe is used as an insertion portion that is inserted into the distal end portion of the existing pipe, and the cylindrical lining is disposed on the outer periphery of the cylindrical lining material excluding the insertion portion. A step of providing an elastically deformable elastic water-stop tubular portion that fluid-tightly seals between the outer periphery of the material and the inner peripheral surface of the tube hole of the peripheral wall of the human hole at a portion where the tip portion of the existing tube is cut off; ,
The tubular lining material provided with the elastic water-stop tubular portion on the outer periphery passes through the tube hole from the inner peripheral side of the peripheral wall of the human hole, and the insertion portion is inserted into the distal end portion of the existing tube. And a step of arranging in the pipe hole of the peripheral wall. A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The tip portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole is within a range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting to a position,
Elasticity in which the outer diameter is the same as the inner diameter of the tube hole, and the inner diameter is substantially the same as the inner diameter of the tip of the existing tube, in the tube hole of the peripheral wall of the human hole at the portion where the tip portion of the existing tube is cut off Providing a deformable elastic water-stop tubular portion;
In a flexible cylindrical lining material impregnated with an uncured curable resin, a step of inserting a steel pipe having a slit in the axial direction with the slit ends overlapped with each other in a reduced diameter state;
The tubular lining material into which the steel pipe having a reduced diameter is inserted is passed through the elastic water-stop tubular portion provided in the pipe hole from the inner peripheral side of the peripheral wall of the human hole, and the end portion of the tubular pipe is inserted into the existing pipe. Inserting into the distal end portion and arranging in the tube hole of the peripheral wall of the human hole;
The steel pipe inserted into the cylindrical lining material inserted into the tip of the existing pipe is expanded in diameter to inflate the cylindrical lining material into a cylindrical shape, and the outer peripheral surface thereof is an inner peripheral surface of the tip of the existing pipe and And a step of hardening the tubular lining material by pressing against the inner peripheral surface of the elastic water-stop tubular portion.   Including a step of cutting an inner wall of the tube hole of the human hole located around the tip portion to be cut off of the existing pipe into an annular shape along the existing pipe and coaxially with the existing pipe to form an annular cut portion. The earthquake resistance construction method of the existing pipe manhole connection part of any one of Claims 1 thru | or 3 characterized by the above-mentioned. Including a step of cutting the inner periphery of the distal end portion of the existing pipe after cutting the distal end portion of the peripheral wall of the human hole cut into the tube hole to form a large-diameter inner peripheral portion. ,
And when the said tubular lining material and the said steel pipe are united by expanding the diameter of the said steel pipe inserted in the said cylindrical lining material, expanding the said cylindrical lining material into a cylindrical shape, and hardening the said cylindrical lining material The outer diameter of the tubular lining material is substantially the same as the inner diameter of the large-diameter inner peripheral portion formed on the inner periphery of the tip of the existing pipe, and the inner diameter of the steel pipe is the large-diameter inner peripheral section of the existing pipe. 5. The earthquake resistance construction method for an existing pipe manhole connection portion according to claim 1, wherein the inner diameter portion is substantially the same diameter as an inner diameter of a small-diameter inner peripheral portion.   The cutting of the tip portion of the existing pipe that is fitted in the pipe hole in the peripheral wall of the human hole has a substantially V-shaped end surface of the existing pipe after cutting along the arc of the outer peripheral wall of the human hole. 6. The earthquake resistant construction method for an existing pipe manhole connecting portion according to any one of claims 1 to 5, wherein the seismic method is cut so as to be a concave surface.

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