JP4503760B2 - Double pipe end closure lid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a closing cover at the end of a double pipe, and is used to close both ends of a gap when a filler is injected and solidified into a gap between an existing pipe and a new pipe in a pipe-in-pipe system.
[0002]
[Prior art]
When rehabilitating an old existing pipe, connect the new pipe in the manhole by the receiving / inserting method, and insert the new pipe into the existing pipe by the length of the pipe for each connection. A pipe-in-pipe method may be applied in which a new pipeline is installed in the pipeline.
[0003]
In this pipe-in-pipe construction method, both ends of the gap between the existing pipe line and the new pipe line are closed, and a filler such as mortar milk is injected and solidified in the gap. A brick system that builds a partition wall by stacking, an air bag system that is fitted with an air bag and sealed by expansion of the air bag by press-fitting air is used.
[0004]
[Problems to be solved by the invention]
However, since the diameter of the existing pipe line is large (for example, 1200 mmφ) and the gap between the new pipe line and the existing pipe line is considerably large (for example, 100 mm), the blockage space is wide. Since the number increases, construction takes time, and the existing pipelines are often in a water-immersed state, and the mortar seal is not easy.
[0005]
In addition, even in the air bag system, when the inside of the installation pipe line is flooded, reliable sealing is difficult, and when the air bag is left attached, mortar, etc. in the air bag after filling work On the other hand, even when removing the airbag, it is necessary to fill the void after removal with mortar or the like. Therefore, even with the air bag system, there are problems in workability and sealability.
[0006]
An object of the present invention is to provide a lid capable of closing a pipe line end with a simple operation in pipe-in-pipe construction.
[0007]
[Means for Solving the Problems]
The closed lid at the end of the double pipe according to the present invention is attached to both ends of the gap in order to inject the filler into the gap between the new pipe inserted into the existing pipe and the existing pipe. a member that is, the joint part and the sailing being joined inserted into watertight through the packing conduit port of the new line - pre abuts fixed to Le inner surface - a isolation portion, new pipe and the existing pipe Between the pipe and the inlet pipe and / or the air vent pipe is attached to the plate portion , and the joint portion is inserted at the end of the new pipe line Depending on whether it is a receiving port or a receiving port, it can be a receiving type or an insertion type.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 (a) is a front view showing the closing lid according to the present invention in use, and FIG. 1 (b) is a cross-sectional view of FIG. 1 (b). In FIG. 1, A shows an example of a closing lid according to the present invention. A packing portion 13 is provided at the end of a plate portion 11 which is abutted and fixed to an inner surface 21 of a manhole and a new pipe 23 of a pipe-in pipe. And a joint portion 12 that is inserted and joined in a watertight manner . 20 is a square hole manhole, 22 is an existing pipe for sewage, 23 is a new pipe for sewage inserted and installed in the existing pipe 22, and a closure lid A is connected to the pipe opening of the new pipe E. The joint portion 12 is inserted and joined via the packing 13, and the plate portion 11 of the closing lid A is brought into contact with the inner surface 21 of the manhole and fixed with anchor bolts 24. A seal material such as a sheet-like packing may be interposed between the plate portion 11 and the manhole inner surface 21.
[0009]
An invert 201 (water guide groove) is usually provided on the bottom surface of the manhole 20, as shown in FIG. 2, but in the example of FIG. And a flat surface that is lower by Δh than the bottom surface of the existing pipe line.
When leaving the above-mentioned invert, the lower half of the plate portion can be cut along the existing pipe contour as shown in FIG. 3 in order to adapt the lower half of the plate portion to the invert. .
In some cases, the inner wall of the manhole is circular, and in this case, the plate portion 11 of the closing lid is a curved plate adapted to the circular inner surface, as shown in FIG.
[0010]
In FIG. 1, reference numeral 14 denotes a filler injection pipe penetrating the plate portion 12, and 15 denotes an air vent pipe. The filler is injected from the injection pipe 14 into the gap between the existing pipeline 22 and the new pipeline 23. As the filling by the injection proceeds, the air in the gap is released from the air vent pipe 15.
[0011]
As shown in FIG. 5, the closing lid A is fitted with the end portion of the receiving collar 121 on the FRP joint main body 120 having the same inner diameter as that of the new pipe, and the FRP pre-mold is attached to the end of the collar. -The plate portion main body 110 is fitted, the plate portion main body 110 and the joint portion main body 120 are surrounded by a fiber reinforced resin layer 122 (for example, an epoxy resin impregnated mat) from the inside and outside, and the injection pipe 14 and the air vent pipe It can be manufactured by penetrating 15.
[0012]
The new pipe in pipe can be a composite FRP pipe filled with resin mortar between the inner pipe and outer pipe made of fiber reinforced resin, provided with a receiving port at one end, and the other end as an insertion port. The pipe dimensions are, for example, an inner diameter of 1000 mmφ with respect to an existing pipe line having an inner diameter of 1200 mmφ, and the construction can be performed as follows.
[0013]
That is, in FIG. 6A, first, the upper end portion of the existing manhole is shaved to enlarge the opening space so that the new tube can be suspended in the manhole 20a. The suspension machine 31 is installed in the upper end opening of the pipe, the new pipes are lowered one by one in the manhole, and the first new pipe 231 lowered to the bottom of the manhole is connected to the pipe of the existing pipe line 22. A new pipe 232 that is inserted into the inside using a jack or the like from the road entrance and then suspended is positioned on the same axis as the new pipe 231, and the new pipe 232 is pushed into the new pipe 231 using a jack or the like. Therefore, these new pipes are connected by the receiving / inserting method. Thereafter, a new pipe connection group consisting of a plurality of new pipes connected is pushed into the existing pipe line in the same manner as described above by the next new pipe, and thereafter the same operation is performed, so that (b) in FIG. As shown in FIG. 5, the tip tube 231 of the new tube connection group is made to reach the conduit port of the reaching side manhole 20b.
Usually, the new pipe is pushed in with the insertion side as the tip, and the cutting pipe material whose length is adjusted is used for the last new pipe, so that both ends of the new pipe line are the insertion type.
After inserting and laying a new pipeline in the existing pipeline as described above, a closure lid is attached as shown in FIG. 1 in each manhole, and a filler is injected into the injection tube of each closure lid. The hose of the machine is connected, and the filler is injected into the gap between the existing pipeline and the new pipeline.
[0014]
In addition to mortar-cement milk suspension, water glass-based semi-suspension and urethane-based polymer solutions can be used as the injection material. The ground is effectively strengthened against the road, and the water stoppage is improved.
[0015]
In the construction described above, the plate portion of the closing lid is previously abutted and fixed to the inner surface of the reaching-side manhole 20b, and the new tube end of the new tube connection group is inserted into the receiving port of the closing lid via the packing. It is also possible to attach the closing lid on the departure-side manhole 20a after completion of insertion and connection of the new pipeline.
[0016]
As shown in FIG. 6 (c), the pipe port of the newly established pipe in the departure-side manhole 20a may be a receiving port, and as shown in FIG. It is also possible to use the pipe ports of the newly installed pipes of the cables 20a and 20b as receiving ports, and considering such a case, the joint portion of the closing lid can be made into an insertion type.
[0017]
FIG. 7 shows an embodiment in which the joint portion of the closing lid is made into an insertion type, and an FRP plate main body at one end of an FRP insertion tube main body 120 ′ whose inner and outer diameters are equal to the inner and outer diameters of the new pipe. 110 is fitted, and the inner and outer sides are surrounded by a fiber reinforced resin layer 122 (for example, an epoxy resin-impregnated mat) from the plate portion main body 110 to the joint portion main body 120 ′, and the injection pipe 14 and the air vent pipe 15 are penetrated. It is set up.
[0018]
In addition, in the case of inclined pipes, filler can be injected from the low-side manhole pipe opening and air can be released from the low-side manhole pipe opening. A single tube for injection or air venting can also be provided.
[0019]
【The invention's effect】
The present invention is a member used for closing both ends when a curable liquid filler is injected into a gap between an existing pipeline and a new pipeline in a pipe-in-pipe system. A plate part abutting and fixed to the inner surface and a joint part inserted and connected in a watertight manner through a packing at the end of the new pipe line are provided. The joint part is inserted and joined to the end of the new pipe line. By simply abutting and fixing the portion to the inner surface of the manhole, the end of the gap between the existing pipe line and the new pipe line can be closed, and the closing can be performed with a simple operation.
In addition, the filler pressure until the filler is solidified can be supported by the plate part, and the packing connection between the joint part and the new pipe end and the close contact between the plate part and the inner surface of the manhole are superior. Since liquid-tightness can be guaranteed, filling and filling operations can be performed smoothly and quickly without leakage of the filling material even in a long pipe-in-pipe line through which a large amount of the filling material is injected.
[Brief description of the drawings]
FIG. 1 (a) is a front view showing a use state of a closing lid according to the present invention, and FIG. 1 (b) is a cross-sectional view of FIG.
FIG. 2 is a drawing used for explaining the manhole in FIG. 1;
FIG. 3 is a drawing for showing a different usage state of the closing lid according to the present invention.
FIG. 4 is a drawing showing another embodiment of the closing lid according to the present invention.
FIG. 5 is a drawing showing another embodiment of the closing lid according to the present invention.
FIG. 6 is a view showing a laying state of a pipe-in-pipe pipe line in which the closing lid according to the present invention is used.
FIG. 7 is a view showing a main part of an embodiment different from the above of the closing lid according to the present invention.
[Explanation of symbols]
A Blocking lid 11 Plate part 12 Joint part 13 Packing 14 Injection pipe 15 Air vent pipe 20 Manhole 22 Existing pipe 23 New pipe

Claims (3)

In order to inject the filler into the gap between the existing pipeline inserted into the existing pipeline and the existing pipeline, it is a member attached to both ends of the gap, and packing is installed at the pipeline opening of the new pipeline. An injection pipe for injecting a filler between the existing pipe line and the new pipe line, and a joint part inserted and joined in a water-tight manner through the plate and a plate part abutted and fixed to the inner surface of the manhole. 2. A closed cover at the end of a double conduit, wherein an air vent tube is attached to the plate portion . The double pipe end blockage lid according to claim 1, wherein the joint part is a receiving type. The double pipe end closing lid according to claim 1, wherein the joint portion is an insertion type.

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