JP2009138434A - Construction method for making manhole connecting section of existing pipe aseismic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a construction method for making a manhole connecting section of an existing pipe aseismic, which makes workability good, which eliminates the risk of damaging an underground cable, a buried pipe for various fluids, etc., existing in close vicinity to the periphery of the peripheral wall of the manhole, and which can make the manhole connecting section of the existing pipe aseismic without affecting the strength of the manhole. <P>SOLUTION: This construction method comprises: a step of cutting out an end of the existing pipe 2, fitted into the pipe hole 5 of the peripheral wall 4 of the manhole 3, from the side of the inner peripheral wall surface 9 of the peripheral wall 4 of the manhole 3 to a position within a range which does not go beyond an outer peripheral wall surface 10 of the peripheral wall 4 in the vicinity of the outer peripheral wall surface 10; a step of providing an annular temporary frame 12 with thickness almost equal to the wall thickness of the existing pipe 2 on the inner wall of the portion, where the existing pipe 2 is cut off, of the pipe hole 5 of the peripheral wall 4 of the manhole 3; a step of arranging a lining pipe 13 inside the existing pipe 2 and the annular temporary frame 12: a step of removing the annular temporary frame 12, provided in the pipe hole 5 of the peripheral wall 4 of the manhole 3, from the pipe hole 5, after arranging the lining pipe 13 inside the existing pipe 2 and the annular temporary frame 12; and a step of providing an elastically deformable elastic cut-off tubular portion 15 in a void formed by removing the annular temporary frame 12 from the pipe hole 5. <P>COPYRIGHT: (C)2009,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, when the damage that the existing pipe has received is seen, breakage, slipping out, slipping, cracking, etc. occur, and the existing pipe is especially fitted and connected to the hole on the peripheral wall of the person 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. As a method of making the existing pipe manhole connection part that is rigidly jointed, the peripheral wall of the human hole around the outside of the existing pipe is cut with a certain width from inside the human hole with a tubular cutter, and the existing pipe and human A method has been disclosed in which a peripheral wall of a hole is cut off and an elastic water-stopping material that can be elastically deformed is filled into an annular gap between an existing pipe formed by cutting and the peripheral wall of a human hole. (For example, refer to Patent Document 1).
JP 2001-40751 A

  However, in the seismic retrofitting method for the existing pipe manhole connection part, the edge cut between the existing pipe and the manhole peripheral wall by the cutter pushes the cutter until it penetrates the manhole peripheral wall and protrudes out of the peripheral wall. An annular gap is largely opened around the existing pipe on the outer peripheral wall surface of the peripheral wall of the hole, and earth and sand or water outside the peripheral wall of the human hole flows into the annular gap, so that the elastic water blocking material into the annular gap It became difficult to fill, and the work could be hindered.

  Further, in order to ensure the edge cutting between the existing pipe and the peripheral wall of the human hole, the cutter is protruded beyond the peripheral wall of the human hole more than necessary. In general, there are many buried objects such as underground cables and various fluid buried pipes in the vicinity of the peripheral wall of the human hole in the vicinity of the peripheral wall. For this reason, there is a risk of damaging buried objects such as underground cables and various fluid buried pipes due to the cutter protruding outside the peripheral wall of the human hole during the edge cutting operation between the existing pipe and the peripheral wall of the human hole. There is a problem.

  The object of the present invention is good workability, there is no risk of damaging embedded objects such as underground cables and various fluid embedded pipes around the peripheral wall of the human hole, The object is to provide an earthquake resistant construction method for existing pipe manhole connections that can be earthquake resistant without affecting the strength.

  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 an earthquake resistance construction method for a human hole connecting portion, and an end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is connected to an outer periphery of the peripheral wall from an inner peripheral wall surface side of the peripheral wall of the human hole. A thickness of a thickness approximately equal to the thickness of the existing pipe on the inner wall of the portion where the existing pipe is cut off in the pipe hole of the peripheral wall of the human hole, and the step of cutting to a position within the range not exceeding the outer peripheral wall surface in the vicinity of the wall surface Providing the annular temporary frame; arranging the lining pipe inside the existing pipe and the annular temporary frame; and arranging the lining pipe inside the existing pipe and the annular temporary frame; Removing the annular temporary frame provided in the tube hole of the peripheral wall from the tube hole; The voids remove the serial cyclic provisional frame, characterized in that it comprises a step of providing an elastically deformable resilient waterproofing tubular portion.

  According to the earthquake resistant construction method for an existing pipe manhole connecting portion according to claim 1, an end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the manhole is formed inside the peripheral wall of the manhole. Since the cutter is cut from the peripheral wall side to the position in the vicinity of the outer peripheral wall surface of the peripheral wall so as not to exceed the outer peripheral wall surface, the cutter does not protrude outside the peripheral wall of the human hole. The area around the pipe is closed, and it is possible to prevent the earth and sand outside the peripheral wall of the human hole from flowing into the pipe hole of the peripheral wall of the human hole from between the outer peripheral wall surface and the periphery of the existing pipe. In addition, the inflow of water can be prevented or minimized, and the work can be easily performed. Also, the underground cable and various fluids that exist close to the outer periphery of the peripheral wall of the manhole by the cutter. There is no risk of damaging buried objects such as underground pipes.

  In addition, an annular temporary frame having a thickness substantially equal to the thickness of the existing pipe is provided on the inner wall of a portion of the peripheral hole of the human hole where the existing pipe is removed, and the existing pipe and the annular temporary frame Since the lining pipe is arranged inside, the lining pipe serves as an existing pipe, and the end of the existing pipe where the lining pipe in the portion where the existing pipe is removed is fitted into the pipe hole of the peripheral wall of the human hole is used. Will be composed. And, since an elastic water-stopping tubular portion that can be elastically deformed is provided in the gap obtained by removing the annular temporary frame from the tube hole, when an earthquake occurs, the existing tube and the human hole formed by the lining tube generated by the earthquake The difference in motion with the peripheral wall can be absorbed by the elastic water-stop tubular portion, and the existing pipe manhole connection portion can be prevented from being destroyed by the earthquake motion.

  In addition, when the end of the existing pipe after cutting with the cutter is in a state of being fitted in the pipe hole of the peripheral wall of the human hole, the pipe is due to the difference in movement between the existing pipe and the peripheral wall of the human hole due to the earthquake. Breakage occurs at the end of the existing pipe fitted in the hole, but the breakage is a small part, as described above, the lining pipe serves as the existing pipe, and the end of the existing pipe is a human hole. Since the end of the existing pipe that fits into the hole in the peripheral wall is configured, even if there is a break in the end of the existing pipe, it can be sufficiently compensated with the lining pipe, and the function as the existing pipe is impaired. It is not.

  Hereinafter, the best mode for carrying out the seismic retrofitting method for an existing pipe manhole connection part according to the present invention will be described in detail with reference to the embodiments shown in the drawings.

  FIG. 1 to FIG. 10 show an example of the implementation of the seismic retrofitting method for an existing pipe human hole connection part according to the present invention, FIG. 1 is a longitudinal sectional view showing a state before construction, and FIG. 2 is a peripheral wall of a human hole Fig. 3 is a longitudinal sectional view showing a state in which an end portion of an existing pipe that is fitted in the pipe hole is cut off, and Fig. 3 shows the thickness of the existing pipe on the inner wall of a portion of the pipe hole on the peripheral wall of the human hole. 4 is a longitudinal sectional view showing a state in which an annular temporary frame having a thickness substantially equal to that of FIG. 4 is provided, FIG. 4 is a longitudinal sectional view showing a state in which a lining pipe is disposed inside the existing pipe and the annular temporary frame, and FIG. Fig. 6 is a longitudinal sectional view showing an example, and Fig. 6 is a longitudinal sectional view showing a state where an annular temporary frame fitted in a tubular hole in a peripheral wall of a human hole is removed from the tubular hole after the lining pipe is arranged inside the existing pipe. FIG. 7 is a longitudinal sectional view showing a state in which an elastic water-stopping tubular portion that can be elastically deformed is provided in a gap obtained by removing the annular temporary frame from the tube hole, Figure 10 is an enlarged sectional view showing another example of the elastic waterproofing tubular portion either.

  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 improvement method of the present example performed on 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 of the human hole 3. The end portion of the existing pipe 2 is cut from the inner peripheral wall surface 9 side of the foundation 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.

  The vicinity of the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a means that the existing pipe 2 remaining in a state of being fitted in the tube hole 5 of the basic peripheral wall portion 4a after the end portion of the existing pipe 2 is excised. This is the position at which the end of can be easily broken when an earthquake occurs and the existing pipe 2 and the basic peripheral wall 4a of the manhole 3 can be edged. 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 end of the existing pipe 2 is preferably about 0 to 5 cm. In order to prevent inflow of earth and sand or water, it is particularly preferable that the distance is at least 0.5 cm. When setting the resection dimension position P of the end portion of the existing pipe 2, since the wall thickness of the foundation peripheral wall portion 4a is not exactly as designed because the foundation peripheral wall portion 4a is hitting on the site, the wall thickness of the foundation peripheral wall portion 4a is set to the electromagnetic wave. It is preferable to set the ablation dimension position P at the end of the existing pipe 2 by measuring by applying or ultrasonic waves.

  Prior to cutting off the end of the existing pipe 2, in order to secure a working space necessary for the cutting operation of the end of the existing pipe 2, the invert concrete 11 on the front surface of the end of the existing pipe 2 is cut out to a necessary extent. deep. The range where the invert concrete 11 on the front surface of the end portion of the existing pipe 2 is excised becomes a space filled with an elastic material that absorbs the difference in movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 as described later. .

  The cutting of the end of the existing pipe 2 is not particularly limited, but in this example, it is removed by cutting with a ring-shaped cutter (not shown). The ring-shaped cutter has a ring shape having the same inner and outer diameter as that of the existing pipe 2.

  In addition to the ring-shaped cutter, for example, a disk-shaped cutter is used, and this cutter is inserted into the existing pipe 2, and the existing pipe 2 is inserted from the inner peripheral side at the cutting dimension position P at the end of the existing pipe 2. And the end of the cut existing pipe 2 may be removed and removed from the pipe hole 5.

  Next, as shown in FIG. 3, an annular temporary frame 12 having a thickness substantially equal to the thickness of the existing pipe 2 is formed on the inner wall of a portion where the existing pipe 2 is cut off in the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. Is provided. In the annular temporary frame 12, although not shown in order to facilitate removal later, it is preferable to form a slit in the axial direction or a spiral slit, but it is not particularly limited.

  Next, as shown in FIG. 4, the lining pipe 13 is disposed inside the existing pipe 2 and the annular temporary frame 12. In the lining pipe 13, in this example, the cylindrical lining material 14 in a curable soft state is inserted into the existing pipe 2 and the annular temporary frame 12, and the inner wall of the existing pipe 2 and the annular temporary frame 12 is inserted. The lining pipe 13 is formed and arranged by pressing and hardening the peripheral wall surface of the cylindrical lining material 14.

  It is publicly known that the tubular lining material 14 is inserted into the existing pipe 2 and the annular temporary frame 12 and the lining pipe 13 is formed and arranged on the inner walls of the existing pipe 2 and the annular temporary frame 12. Technology is used.

  For example, a flexible tubular lining material 14 impregnated or coated with an uncured curable resin is used for existing pipes using the techniques disclosed in Japanese Patent Publication No. 7-4853 and Japanese Patent Application Laid-Open No. 2005-90581. 2 and the annular temporary frame 12 are inserted into the inner wall of the existing pipe 2 and the annular temporary frame 12, and the peripheral wall surface of the cylindrical lining material 14 is pressed against the inner wall of the annular temporary frame 12 to cure and cure the curable resin. be able to. The cylindrical lining material 14 has a three-layer structure of an impermeable inner film layer, a resin-absorbing inner layer impregnated with a curable resin, and an impermeable outer film layer. Examples of the curable resin include a thermosetting resin, a photocurable resin, and a room temperature curable resin. The resin is impregnated into a resin-absorbing inner layer. Moreover, although a polyurethane film is used as an impermeable inner film layer and a polyethylene film is used as an impermeable outer film layer, it is not limited to these.

  Further, by using the technique disclosed in Japanese Patent Laid-Open Nos. 10-278113 and 6-293071, a hard or semi-rigid tubular lining material 14 formed of a thermoplastic resin is replaced with the existing pipe 2 and the annular temporary The lining pipe 13 is formed and disposed by being inserted into the frame 12 and heated and softened by pressurizing and inflating the cylindrical lining material 14 against the inner wall of the existing pipe 2 and the annular temporary frame 12. You may do it.

  When the cylindrical lining material 14 is inserted into the existing pipe 2 and the annular temporary frame 12, it is inserted over the entire length of the existing pipe 2 divided by the two human holes 3. It is preferable that a lining pipe 13 made of a cylindrical lining material 14 is formed and disposed inside the lining 12.

  As another example of the lining pipe 13, as shown in FIG. 5, for example, the technique disclosed in Japanese Patent Laid-Open No. 10-82497 can be used to impregnate or apply an uncured curable resin. A certain sheet-like lining material 14a is wound around a repair machine, the repair machine is inserted into the existing pipe 2 and the annular temporary frame 12, and is positioned so as to straddle the existing pipe 2 and the annular temporary frame 12, and is formed into a sheet shape by air pressure. The lining pipe 13 can be formed and arranged by expanding the lining material 14a and pressing the sheet-like lining material 14a against the inner walls of the existing pipe 2 and the annular temporary frame 12 to cure the curable resin.

  Although not shown, other examples of forming the lining pipe 13 and arranging it inside the existing pipe 2 and the annular temporary frame 12 are disclosed in, for example, Japanese Patent Publication No. 4-44153 and Japanese Patent Application Laid-Open No. 2003-191329. The belt-like members are sequentially folded in the circumferential direction, and the side ends of the belt-like members are joined to each other to form a spirally wound lining pipe 13, while the lining pipe 13 is connected to the existing pipe 2 and the annular temporary frame 12. It may be arranged to be sent inside.

  Next, as shown in FIG. 6, after the lining pipe 13 is disposed inside the existing pipe 2 and the annular temporary frame 12, the annular temporary frame 12 is removed from the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3.

  Next, as shown in FIG. 7, an elastic water-stop tube that can be elastically deformed in a gap between the lining pipe 13 of the portion where the annular temporary frame 12 is removed from the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. A portion 15 is provided.

  The elastic water-stop tubular portion 15 is formed using an elastic water-stopping material such as a water expansion rubber material containing a soft resin such as silicon resin or soft epoxy urethane or a water-absorbing material. As means for providing the elastic water-stop tubular portion 15 in the space between the lining pipe 13 in the portion where the annular temporary frame 12 is removed from the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3, an elastic water-proof material is used as an existing pipe. The elastic water-stop tubular portion 15 having a thickness substantially equal to the wall thickness of 2 may be formed, and the elastic water-stop tubular portion 15 may be inserted and provided in the gap between the tube hole 5 and the lining pipe 13. The water blocking tubular portion 15 may be provided by injecting an elastic water blocking material into the gap between the tube hole 5 and the lining tube 13 to form the elastic water blocking tubular portion 15.

  Further, the elastic water-stop tubular portion 15 may be adhered to the outer peripheral surface of the lining tube 13 or may be pressed against the outer peripheral surface of the lining tube 13. The elastic water-stop tubular portion 15 used in press contact with the outer peripheral surface of the lining pipe 13 is not shown in order to ensure sealing performance and slidability with the lining pipe 13, but the elastic water-stop tubular portion 15 is not shown. It is preferable to form a wavy inner surface.

  8, 9, and 10 show other examples of the elastic water-stop tubular portion 15, and the elastic water-stop tubular portion 15 shown in FIG. 8 has a concave portion 15 a and a convex portion 15 b whose inner surface is annular in the axial direction. Are formed continuously, and the recess 15a is deeply cut. The elastic water-stop tubular portion 15 shown in FIG. 9 has a shape in which an inner surface has an annular concave portion 15a and a convex portion 15b formed continuously in the axial direction, and the convex portion 15b is hollow. The elastic water-stop tubular portion 15 shown in FIG. 10 has a shape in which an inner surface is formed by continuously forming a concave portion 15a and a convex portion 15b that are annular in the axial direction, and is entirely hollow. These elastic water-stop tubular portions 15 shown in FIGS. 8, 9 and 10 are all excellent in sealing performance with the lining pipe 13 and stretchability in the axial direction, and can be bonded to the outer peripheral surface of the lining pipe 13. It may also be pressed. In any case, it is only necessary to stop water between the elastic water-stop tubular portion 15 and the inner wall of the tube hole 5 and between the elastic water-stop tubular portion 15 and the outer peripheral surface of the lining pipe 13.

  Thereafter, the filler 16 is filled into the cut portion of the invert concrete 11 in front of the end portion of the existing pipe 2 that has been cut prior to cutting the end portion of the existing pipe 2. The filler 16 is not particularly limited, but an elastic material is preferable. In this example, an elastic material is used as the filler 16. As this elastic material, you may use the elastic water stop material which forms the elastic water stop tubular part 15, for example. Further, the step portion of the lining pipe 13 and the inverted concrete 11 is filled with a filler 17 such as resin or mortar and leveled. 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 6 is shown in the drawing as a process of making the existing pipe manhole connection 6 on the left side of the figure, but the existing pipe manhole on the right side of the figure is shown. 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 part, the end part of the existing pipe 2 fitted into the pipe hole 5 of the basic peripheral wall part 4a of the human hole 3 is used as the inner peripheral wall surface of the basic peripheral wall part 4a. Since the cutting is performed from the 9 side to the position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10, the cutter does not protrude outside the basic peripheral wall portion 4 a of the human hole 3, and thus the basic peripheral wall portion of the human hole 3. The space between the outer peripheral wall surface 10a of 4a and the periphery of the existing pipe 2 is in a closed state, and a person enters the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 from between the outer peripheral wall surface 10 and the periphery of the existing pipe 2. The earth and sand outside the basic peripheral wall portion 4a of the hole 3 can be prevented from flowing in, the inflow of water can be prevented or minimized, and the work can be easily performed. The underground cable and various fluids that exist in the vicinity of the outer periphery of the basic peripheral wall 4a of the human hole 3 There is no risk of damaging the buried objects of buried pipes and the like.

  Further, an annular temporary frame 12 having a thickness substantially equal to the thickness of the existing pipe 2 is provided on the inner wall of a portion of the tube hole 5 of the basic peripheral wall portion 4a of the human hole 3 where the existing pipe 2 is cut out. Since the lining pipe 13 is arranged inside the temporary frame 12, the lining pipe 13 serves as the existing pipe 2, and the lining pipe 13 in the portion where the existing pipe 2 is removed is the pipe of the basic peripheral wall portion 4 a of the human hole 3. The end part of the existing pipe 2 fitted in the hole 5 is constituted. And since the elastic water-stop tubular portion 15 which can be elastically deformed is provided in the gap obtained by removing the annular temporary frame 12 from the tube hole 5, when an earthquake occurs, the existing pipe 2 constituted by the lining pipe 13 generated by the earthquake and The difference in movement of the human hole 3 from the peripheral wall 4 can be absorbed by the elastic water stop tubular portion 15.

  That is, the difference in the vertical movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 is absorbed by the deformation in the thickness direction of the elastic water blocking tubular portion 15, and the peripheral wall 4 of the existing pipe 2 and the human hole 3. The difference in axial movement between the elastic water-stop tubular portion 15 and the lining pipe 13 is that the elastic water-stop tubular portion 15 is deformed in the axial direction and the elastic water-stop tubular portion 15 is lined with the lining. When the pipe 13 is in pressure contact, it is absorbed by the axial deformation of the elastic water blocking tubular portion 15 and the sliding of the lining pipe 13 in the axial direction. As described above, when the elastic water blocking tubular portion 15 and the lining pipe 13 are in pressure contact with each other, the difference in the axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 is the same as that of the lining pipe 13. Since it is also absorbed by the slide, the difference in the axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 can be reliably absorbed even if the deformation rate of the elastic water-stop tubular portion 15 is small.

  The end surface of the elastic water-stop tubular portion 15 is closed by the filler 16 filled in the cut portion of the invert concrete 11 at the lower half thereof, and only the upper half is opened, but in this example, Since the filler 16 is an elastic material, the lower half of the end surface of the elastic water-stop tubular portion 15 is closed with the filler 16 made of an elastic material. As a result, the deformation of the lower half of the end surface of the elastic water-stop tubular portion 15 is absorbed by the filler 16 made of an elastic material, so that the lower half of the end surface of the elastic water-stop tubular portion 15 is also an open surface. It becomes equivalent and facilitates the deformation of the elastic water-stop tubular portion 15, whereby the difference in axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 can be more reliably absorbed.

  As described above, in this example, the cut portion of the invert concrete 11 in front of the end portion of the existing pipe 2 is filled with the filler 16 made of an elastic material, but the filler 16 is a hard material such as mortar. In this case, the end face of the elastic water-stop tubular portion 15 is closed with a filler 16 made of a hard material on the lower half thereof, and the deformation of the elastic water-stop tubular portion 15 is caused by the deformation of the elastic water-stop tubular portion 12. It is absorbed by the deformation of only the upper half of the end face.

  Further, when the end of the existing pipe 2 after being cut by the cutter is fitted in the pipe hole 5 of the foundation peripheral wall 4a of the human hole 3, the foundation of the existing pipe 2 and the human hole 3 due to the earthquake. Due to the difference in movement from the peripheral wall 4a, the end of the existing pipe 2 fitted in the pipe hole 5 is broken, but the break is a slight part, and the lining pipe 13 is already installed as described above. Since it plays the role as the pipe 2 and the end thereof constitutes the end of the existing pipe 2 fitted into the pipe hole 5 of the basic peripheral wall 4a of the human hole 3, the end of the existing pipe 2 Even if there is a breakage, the lining pipe 13 can be sufficiently supplemented, and there is no possibility that the function as the existing pipe 2 is impaired.

It is a longitudinal cross-sectional view which shows the state before construction in the process of the implementation of the earthquake resistance construction method of the existing pipe manhole connection part which concerns on this invention. It is a longitudinal cross-sectional view which shows the state which excised the edge part of the existing pipe | tube fitted to the pipe hole of the surrounding wall of a human hole. It is a longitudinal cross-sectional view which shows the state which provided the cyclic | annular temporary frame of the thickness substantially equal to the thickness of the existing pipe | tube in the inner wall of the part which excised the existing pipe | tube in the pipe hole of the surrounding wall of a human hole. It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe | tube inside the existing pipe | tube and a cyclic | annular temporary frame. It is a longitudinal cross-sectional view which shows the other example of a lining pipe | tube. It is a longitudinal cross-sectional view which shows the state which removed the annular temporary frame fitted to the pipe hole of the surrounding wall of a human hole from the pipe hole, after arrange | positioning a lining pipe | tube inside the existing pipe. 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 space | gap which removed the cyclic | annular temporary frame from the tube hole. It is an expanded sectional view showing other examples of an elastic water stop tubular part. It is an expanded sectional view showing other examples of an elastic water stop tubular part. It is an expanded sectional view showing other examples of an elastic water stop tubular part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Existing pipe 3 Human hole 4 Peripheral 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 surface 10 Outer peripheral wall surface 11 Invert concrete 12 Annular temporary frame 13 Lining pipe 14 Cylindrical lining material 14a Sheet-like lining material 15 Elastic water stop tubular portion 15a Concave portion 15b Convex portion 16, 17 Filler

Claims (1)

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 end of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is within the 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,
Providing an annular temporary frame having a thickness substantially equal to the thickness of the existing pipe on the inner wall of the portion of the peripheral hole of the human hole where the existing pipe is cut off in the pipe hole;
Arranging a lining pipe inside the existing pipe and the annular temporary frame;
After disposing the lining pipe inside the existing pipe and the annular temporary frame, removing the annular temporary frame provided in the pipe hole of the peripheral wall of the manhole from the pipe hole;
And a step of providing an elastic water-stopping tubular portion that can be elastically deformed in a space obtained by removing the annular temporary frame from the tube hole.

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