JP4863339B2 - The structure of the large-diameter pipe joint part that allows the inclination angle of the repairing device from the inside of the mounting pipe joint part such as existing manholes and on-site manholes to be freely adjusted - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a structure of a large-diameter pipe joint portion that allows a tilt angle of a repair device from the inside of an existing manhole joint and an on-site manhole, etc.
[0002]
[Prior art]
Conventionally, a joint part in which a mounting pipe such as a main pipe, a branch pipe, or a branch pipe is inserted and connected to a side hole such as a manhole, a culvert, or a main pipe, has a joint member wound around the outer surface of the mounting pipe as shown in FIG. Then, it is inserted into the side hole, and the outer gap is filled with mortar and the like, and further, a piled-up portion by mortar or the like and a concrete compacted portion are provided on the outside.
[0003]
The large-diameter pipe is received by a side hole such as a manhole that is placed on-site, and the gap is closed with mortar or the like.
[0004]
[Problems to be solved by the invention]
However, there is a problem that the joint part is cracked or damaged by mortar or the like due to continued vibration or heavy vibrations for many years. Since the work space has been formed, a large amount of cost is required, and at the same time, even if the work space opened by a sheet pile or the like is surrounded, there is a problem that the work is dangerous due to landslide.
[0005]
Moreover, the joint part which receives the pipe end part of a large-diameter pipe in the side hole of the manhole which is hit on the spot has a problem that pipe breakage occurs due to lack of flexibility.
[0006]
The present invention is formed by cutting the entire circumference of the side hole from the inner space of the manhole when repairing water leakage or the like between the side hole of the existing manhole and the mounting pipe that is fitted and connected to the side hole. In an apparatus for fitting a flanged cylindrical joint formed by inserting a metal cylinder into a metal casing in a cut-off side hole, even when the mounting pipe is inclined with respect to the side hole in the flanged cylindrical joint as it is The metal cylinder and the metal casing are inclined and welded to fit the inclination angle of the mounting pipe so that they can be inserted, and are inserted into the cut-off side holes. In addition to welding the metal casing and metal cylinder constituting the cylindrical joint along the inclination of the mounting pipe and inserting them into the side hole, the metal casing is welded and fixed to the assembly rebar of the manhole. In order to solve this problem.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1 to 8 are for repairing the joint between the side hole of the manhole and the mounting pipe. An operator enters the inner space of the manhole 1 and cuts the entire circumference of the side hole 2 portion. A cut-out side surface hole 2a for enlarging 2 is formed. At this time, as shown in FIG. 2, care should be taken so that the under-pipe dimension does not fall below the prescribed dimension. A metal cylinder 4 is inserted into a boring part 3a of a circular metal casing 3, and welded at an intermediate portion to form an integral flanged cylindrical joint 5. The flanged cylindrical joint 5 is inserted into the cut-off side surface hole 2a. Is inserted from the inner space of the manhole 1, the stopper ring 6 is hooked from the inner side to the outer end of the metal cylinder 4 of the joint 5, and the V-shaped double structure rubber ring 7 is inserted therein. An intermediate portion of the rubber ring 7 is pressed against the metal cylinder 4 and a mounting tube 9 such as a fume tube is fitted inside the rubber ring 7, and a fastening band 11 made of metal wire or the like is attached to the mounting tube 9. Crimp. If the end of the mounting tube 9 is damaged, a short tube having the same shape as the mounting tube may be jointly repaired from the inner space of the manhole 1. 11 a is a band groove of the tightening band 11. As shown in FIG. 5B, the rubber ring 7 may be hooked to the inner end of the metal cylinder 4 by providing a stopper ring 6a at the inner end. FIG. 5 (c) shows an example of a single structure rubber ring 8. In any rubber ring, the stopper ring 6 may be formed in a U-shape as shown in FIG. 5 (d). .
[0008]
1A and 1B, the flanged cylindrical joint 5 is formed by a linear shape 4a in which the inner ends of the metal housing 3 and the metal cylinder 4 are illuminated when the manhole 1 is a square box shape. However, when it is a circular wall surface in plan view, it is formed in a circular shape 4b.
[0009]
In addition, the cut-out side surface hole 2a outside the metal cylinder 4 is filled with a concrete powder produced by fracturing of the concrete by mixing latex mortar with high adhesive viscosity or water-expandable cement to form an elastic joint material 12. Then it is closed and the repair is completed. Reference numeral 12a denotes a member for preventing the elastic joint material 12 from being detached, which is formed in a coil shape or the like and attached to the outer peripheral surface of the metal cylinder 4.
[0010]
As shown in FIG. 6, a water-swellable rubber seal material 13 may be applied to the entire circumference of both sides of the metal casing 3 to tightly adhere to the elastic joint material 12. Further, the inner surface of the cut side hole 2a of the manhole 1 is smoothed so that dust and the like are not caught. In addition, as shown in FIG. 7, the ring 14a is welded to the metal cylinder 4 or the protrusion 14b for drawing or punching is provided so that the rubber rings 7 and 8 do not move from the metal cylinder 4. There is also. Further, when the attachment tube 9 is connected with an inclination, welding is performed by inclining the metal cylinder 4 and the metal housing 3 so as to match the inclination angle of the attachment tube 9 as shown in FIGS. You can also
[0011]
As described above, the manhole has been described along with the repair from the inside. However, the same procedure can be used when connecting a branch pipe or a branch pipe to the culvert or main pipe.
[0012]
FIG. 9 to FIG. 10 show examples of spotting of the manhole 1a in order to form a manhole receptacle at the end of the large-diameter pipe 15 piped underground including an inclination. Reinforcing bars 17 are assembled with rhombuses or the like at appropriate portions of the side holes 16 to which the large-diameter pipe 15 is connected, and the contact points such as the four corners of the metal housing 18 formed into a square or the like are welded to the reinforcing bars 17. And fix. The metal cylinder 19 is inserted into the bore portion 18a of the housing 18 in accordance with the inclination angle of the large-diameter pipe 15 and welded at an intermediate portion, and the rubber ring 8 is inserted into the metal cylinder 19 as described above. Is inserted and supported to fit and support the large-diameter pipe 15 to form the joint portion 21, and the manhole 1a is formed from cast-in-place concrete. It should be noted that an elastic joint material layer is provided on the outside of the metal housing 18 and the metal cylinder 19 or a water-expandable sealing material is applied to strengthen the joint with the cast-in-place concrete and further water leakage. It may be prevented. Further, the metal housing 18 and the metal cylinder 19 may be attached in advance by measuring the inclination of the large-diameter pipe 15. Reference numeral 20 denotes a reinforcing plate with a window hole 20a that removes the welded portion between the boring portion 18a and the metal cylinder 19.
[0013]
【Effect of the invention】
As described above, since the present invention can repair the leakage of the joint portion of the mounting pipe by utilizing the internal space of the existing manhole, the effect of reducing the cost and making the work safe and safe is produced. .
[0014]
In addition, since the flanged cylindrical joint is fitted into the cut-out side hole and the mounting pipe is received by the rubber ring, the joint portion is robust and flexible.
[0015]
Since the metal housing has a fixing action, the joint portion has an effect of further strengthening.
[0016]
In addition, as a receiving port for a large-diameter pipe, using a manhole on-site punching, a rebar is conveniently assembled to the side hole portion and a brazed cylindrical joint is welded and fixed, and the metal cylinder of the joint is attached to the large-diameter pipe. It is robust because it is inserted and welded into the boring part of the housing according to the inclination angle of the body, and it is robust, and since it supports a large diameter pipe with a rubber ring, it is flexible and prevents breakage of the large diameter pipe. The effect that it can be produced.
[Brief description of the drawings]
FIG. 1 shows a cylindrical joint with a flange, where (a) shows an example in which the inner end of a metal cylinder is flat, and (b) shows an example in which a curved surface is formed. Fig. 3 Side sectional view of the manhole showing the state where the pipe is attached Fig. 4 Side sectional view showing the state where the main pipe is connected Fig. 5 Cross section showing an example of the shape of the rubber ring 6] Side view showing an example in which a water-swellable sealing material is applied to both surfaces of a metal casing. [FIG. 7] (a) is an example in which a metal ring is provided with a projecting ring, and (b) is an example in which a projection is provided. [Fig. 8] (a) and (b) are side views showing an example in which a metal casing and a metal cylinder are welded to each other with an inclination angle. [Fig. 9] Front view showing a state in which the metal frame is fixed by welding. [Fig. 10] State where manholes are formed from cast-in-place concrete and mains are connected [FIG. 11] Cross-sectional view of a conventional example [Explanation of symbols]
Reference numeral 1 denotes a manhole 1a, an in-place manhole 2, a side hole 2a, a cut-out side hole 3, a casing 3a, a bore 4, a metal cylinder 5, a brazed cylindrical joint 6, 6a, a stopper ring 7, a V-shaped double structure The rubber ring 8 is a single structure rubber ring 9, the mounting tube 10, the expansion ring 11, the tightening band 11a, the band groove 12 of the tightening band, the elastic joint material 12a, the separation preventing member 13, the water-swellable sealing material 14a, and the protruding ring 14b. The projection 15 is a large-diameter pipe 16, the side hole 17 is a reinforcing bar 18, the metal casing 18a is a boring part 19, the metal cylinder 20 is a reinforcing plate 20a is a window hole,

Claims (2)

  An open side surface hole formed by cutting the entire circumference of the side hole from the internal space of the manhole in repairing water leakage or the like between the side hole of the existing manhole and the mounting pipe fitted and connected to the side hole. In a device for fitting a flanged cylindrical joint formed by inserting a metal cylinder into a metal casing, the fitting tube can be inserted into the flanged cylindrical joint as it is even when it is inclined with respect to the side hole. As described above, the side hole of the existing manhole and the mounting pipe joint are characterized in that the metal cylinder body and the metal casing are inclined and welded in accordance with the inclination angle of the mounting pipe and are fitted into the cut side hole. Department repair equipment. When hitting a manhole with a side hole for fitting and connecting a mounting pipe, the brazed cylindrical joint formed by inserting the metal cylinder into the metal casing is inclined with respect to the side hole. The metal housing and the metal cylinder are inclined and welded in accordance with the inclination angle of the mounting tube so that they can be inserted as they are, and are inserted into the side holes, and the metal housing is attached to the manhole. The structure of the side hole of the in-situ manhole and the mounting pipe joint, which is welded and fixed to the assembled rebar.

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