JPH0771686A - Water stop construction method and structure for pipe line connecting part - Google Patents

Abstract

PURPOSE:To provide a water stop construction method and a structure for a pipe line connecting part wherein a sure water stop function can be ensured over a long period. CONSTITUTION:In a connecting part water stop construction method and a connecting part water stop structure for stopping water in the first pipe line 1 and a connecting part 6 to the second pipe line 4, a regenerating cover unit 8, having a protrusive streak part 8c of water swelling material in the periphery of both end parts and a protruding part 8j of cylindrical shape further of water swelling material fitted into the second pipe line 4 from its opening end part, is mounted into the first pipe line 1, and the protruding part 8j fitted into the second pipe line 4 is press held to an internal peripheral surface 4c by a tube unit 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stop construction method and a water stop structure for a connecting portion between a first pipe and a second pipe branched from the middle of the first pipe.

[0002]

2. Description of the Related Art Generally, a first pipe line such as a main pipe of a sewer system buried in the ground and a second pipe line such as an attachment pipe branched from the middle of the first pipe line are Fume tube, ceramic tube,
Cast iron pipes and vinyl chloride pipes are widely used. The inner peripheral surfaces of these pipelines are corroded and deteriorated by hydrogen sulfide and other corrosive gases and adhered substances after long-term use, and the pipe thickness is reduced and the strength is lowered. Also, due to ground pressure, ground subsidence, etc., the joints between pipelines are displaced and gaps are created, and cracks occur near the joints due to overloading, etc. Water flowing in the road may leak into the ground. Due to the infiltration and leakage of groundwater and the like into the pipeline, earth and sand around the pipeline may flow out to form a hollow portion on the rear surface of the pipeline, which may cause a road surface depression.

As a countermeasure against this, as shown in FIG. 10, which is a cross-sectional view of the main part of the connecting portion 23 of the first and second conduits 21 and 22,
A resin water blocking member 2 in which a flange portion 24b is integrally formed at one end of a cylindrical portion 24a that can be fitted into the second conduit 22.
4 of the cylindrical portion 24a of the second conduit 22 open end 2
It is carried out by inserting from 2a and adhering and fixing.

Specifically, the water blocking member 24 which is in an uncured state and has an adhesive function is attached to the expanding device 25 so that the water blocking member 24 together with the expanding device 25 is connected to the connecting portion 23 in the first conduit 21. It is arranged corresponding to.

The spreader 25 includes a shaft portion 25a and the shaft portion 2
An inflating portion 25b having a protrusion that expands in a floating ring shape by press-fitting a pressure fluid, for example, compressed air, which is fixed so as to continuously extend to the outer periphery of 5a and supports the water blocking member 24.
And a nipple 25c for pressurizing compressed air through a hose (not shown), and the expansion section 25b is moved by compressed air supplied to the nipple 25c through a hose from a supply source provided on the ground. Inflate radially.

As a result, the cylindrical portion 24a of the water blocking member 24 provided in the expansion portion 25b is inserted into the second pipe line 22 and the flange portion 24 is provided on the inner peripheral surface 22a of the second pipe line 22.
b is pressed against the inner peripheral surface 21a of the first conduit 21, and remains in this state until the water blocking member 24 hardens and adheres to the inner peripheral surfaces 21a and 22a. Subsequently, the compressed air in the expansion section 25b is removed, and the spreader 25 is removed.

Therefore, the inner peripheral surface 21a of the first conduit 21 and the flange portion 24b and the inner peripheral surface 22a of the second conduit 22 and the cylindrical portion 24a are maintained in close contact with each other, and the first pipe Intrusion and leakage of groundwater and the like into the pipelines 21 and 22 are prevented from the gap a between the coupling section 23 between the channel 21 and the second pipeline 22 and the crack b generated near the coupling section.

[0008]

According to the water blocking method of the pipe connecting portion, the connecting portion between the first pipe and the second pipe and the vicinity of the connecting portion are covered with the resin water blocking member. Therefore, it is possible to prevent the infiltration and leakage of groundwater and the like from the gap between the connecting portions and the cracks generated near the connecting portions. However, when the water blocking member in the uncured state is mounted in the pipeline, if water adheres to the pipeline contacting the water blocking member, curing of the resin is hindered,
It remains uncured, and the water-stopping effect cannot be obtained,
In addition, the resin water blocking member may shrink and come off during curing. Furthermore, relative displacement between the pipeline and the water blocking member may occur due to earth pressure, overload, vibration, etc., or it may be corroded by infiltrated water, hydrogen sulfide, other corrosive gases, etc., and deteriorate over a long period of use. , A myriad of minute gaps are created between the resin water stop member and the inner peripheral surface of the pipeline, and groundwater, etc. that has infiltrated through the gaps and cracks in the connecting part flows into the pipeline through these minute gaps. However, there are some problems such as not being able to obtain a complete water-stopping effect, and therefore there is a problem such that the water-stopping work around the connection part must be completed in advance.

[0009] Therefore, an object of the present invention is to provide a pipe line connecting part water stoppage construction method and a connecting part water stoppage structure which can reduce the amount of water stopping work in advance and ensure a reliable water stopping function for a long period of time. To do.

[0010]

According to the present invention, which achieves the above-mentioned object, the method for shutting off water at a connecting portion of a pipeline according to the present invention is such that one opening end communicates with the first pipeline and an intermediate portion of the first pipeline. In a waterproofing method of a connecting portion with a second pipeline, a cylindrical, water-impermeable and elastically deformable sleeve having ridges of a water-swelling material on both outer circumferences is housed in the sleeve. A cylindrical base capable of expanding the diameter, an opening penetrating the sleeve and the base corresponding to the opening end of the second conduit, and water swelling protruding from the end edge of the opening in a cylindrical shape. A rehabilitation cover including a protrusion of the elastic material is inserted into the first conduit, the protrusion is fitted into the opening end of the second conduit, and subsequently the base of the rehabilitation cover is expanded. To hold the sleeve against the inner peripheral surface of the first conduit, and then insert the uncured cylindrical body into the cylindrical protrusion to expand and maintain the expanded diameter. By of curing the tubular body in condition it is to clamping holding projections by the opening edge of the opening of the cylindrical body and the second conduit inner peripheral surface and rehabilitation for covering body.
Further, the water blocking structure of the connecting portion of the pipeline according to the present invention is the water blocking structure of the connecting portion of the first pipeline and the second pipeline having one opening end communicating with the first pipeline. And a cylindrical, elastically deformable sleeve having water-swelling material ridges on the outer circumferences of both ends, and an elastically deformable sleeve housed in the sleeve and expanded in diameter to form the sleeve as the first conduit. A cylindrical base that presses and holds the inner peripheral surface, an opening that penetrates the sleeve and the base corresponding to the second conduit opening end, and a cylindrical projection from the opening end edge of this opening. And a projecting portion of the water-swelling material that fits into the opening end portion, and the projecting portion is held in cooperation with the inner peripheral surface of the second conduit and the opening end edge of the rehabilitation coating body. And a cylindrical body that fits into the holding portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pipe connecting member waterproofing method and a pipe connecting water blocking structure according to the present invention will be described below with reference to FIGS.

In the figure, reference numeral 1 is a first pipeline which is a main pipe of the sewer buried in the ground, and the first pipeline 1 is a plurality of fume pipes and ceramic pipes connected in series. , Cast iron pipe, etc. One end of the first pipeline 1 communicates with the manhole 2,
The other end is connected to another manhole 3. Reference numeral 4 is
One opening end 4a is connected to the first conduit 1, and the other opening end 4b is a second conduit which is a branch pipe communicating with, for example, the domestic drainage fitting pipe 5 and this second The conduit 4 is composed of a plurality of fume pipes, ceramic pipes and the like connected in series.

A connecting portion 6 between the first conduit 1 and the second conduit 4.
When carrying out water stoppage work, first use a pipe cleaning car, etc.
The inner peripheral surfaces 1a and 4c of the conduit 1 and the second conduit 4 are cleaned, and if necessary, these inner peripheral surfaces 1a and 4c are ground by a boring machine or the like to adjust the shapes.

Next, the rope 7 is passed from one end of the first pipeline 2 to the other end, and an expanding machine 9 equipped with a rehabilitation cover 8 forming a part of a water stop is connected to the middle of the rope 7. By pulling the rope 7, the expanding device 9 can be moved to one end side of the first conduit 1 by a predetermined distance, and the expanding device 9 disposes the rehabilitation covering 8 on the connecting portion 6.

When the spreader 9 is moved, the television camera 10 is moved together with the spreader 9 or the spreader 9 is moved.
It is preferable that the rehabilitation cover 8 and the spreader 9 be moved while monitoring the image from the television camera 10 on a monitor, and a projection 8j described later has an opening end portion in the second conduit 4. Confirm the presence or absence of insertion from 4a to the second conduit 4
It is preferable to use a monitor by the television camera 11 for a mounting pipe introduced into the inside. In addition, it is preferable in operation that the expander 9 is a rotary expander having a function of rotationally positioning the rehabilitation covering 8 mounted on the expander 9 along the inner peripheral surface 1a of the first conduit 1. .

As shown in the perspective view of FIG. 6, the rehabilitation cover 8 is elastically deformable and has a water impermeable sleeve 8A.
And an elastically deformable sheet-shaped base 8B.

The sleeve 8A is made of a water-impermeable polymer material such as rubber or synthetic resin, and has a cylindrical portion 8a.
A water-swelling material that continuously extends in the circumferential direction on the outer circumference of each end 8c in the axial direction, such as an ether-based polyurethane elastomer, a water-absorbent resin such as an isobutylene-maleic anhydride copolymer, or these water-absorbent materials. Ridge 8 formed of a mixture of resin and chloroprene rubber, natural rubber, etc.
c is formed. The ridge portion 8c may be attached to the tubular portion 8a by embedding or bonding, or may be integrally joined or joined to the tubular portion 8a during molding or vulcanization.

On the other hand, the base 8B is made of a sheet-shaped metal material having corrosion resistance such as stainless steel, copper, and copper alloy, and is cylindrical, that is, spiral so that one end 8d is inside the other end 8e. After being deformed into a shape, it is placed inside the sleeve 8A. Both ends of the base 8B have edge portions 8f that are curved outward so as to accommodate the sleeve 8A from both sides, and the edge portions 8f prevent the sleeve 8A from being washed when sewage flowing in the first conduit 1 is washed. It protects and enhances the strength of the base 8B, and thus the first conduit. Further, it has a plurality of locking pieces 8g protruding from the base 8B for locking the base 8B in an expanded state by locking the end 8d of the base 8B.

Further, as shown in FIG. 5, the rehabilitation cover 8 has a diameter substantially corresponding to the inner diameter of the open end 4a of the second conduit 4, and includes the base 8B and the tubular portion 8a of the sleeve 8A. A penetrating opening 8h is formed, and a protruding portion 8j made of a substantially cylindrical water-swelling material that protrudes outwardly is formed along the inner edge of the opening 8h so as to cover the opening end edge 8i of the base 8B and the sleeve 8A. It is provided.

As shown in FIG. 1, the first and second conduits 1,
After moving to a predetermined position of the connecting portion 6 of No. 4, the base 8B of the rehabilitation cover 8 is expanded to such an extent that the locking piece 8g protruding from the base 8B can be engaged with the one end 8d of the base 8B. It As a result, the protrusion 8c is pressed by the inner peripheral surface 1a of the first conduit 1 and elastically deformed, and the cylindrical protrusion 8j is fitted into the second conduit 4.

Next, when the expansion of the base 8B by the expanding device 9 is released, the base 8B is contracted by the restoring force of the protruding portion 8c until the locking piece 8g engages with the one end 8d of the base 8B. As a result, the protruding portion 8c is maintained in a state of being pressed by the inner peripheral surface 1a of the first conduit 1 by the base 8B.
The inner peripheral surface 1a of the conduit and the ridge portion 8c are kept in close contact with each other.

Then, the rope 7 is towed and the spreader 9 is moved to the first position.
Is removed from the inside of the conduit 1.

Next, a mounting pipe expanding machine 13 equipped with a cylindrical body 12 containing an uncured resin layer forming a part of a water blocking body in the second pipe line 4 from the mounting pipe box 5 is shown in FIG. As shown in FIG. 3, the protrusion 8j of the rehabilitation cover 8 attached to the connecting portion 6 is inserted from the inside to a position where the cylindrical body 12 covers, and the diameter of the cylindrical body 12 is opened by the expanding device 13, 12 is the protruding portion 8
via j, the inner peripheral surface 4c of the second conduit 4 and the rehabilitation cover 8
The base 8B forming the opening 8h and the opening edge 8i of the sleeve 8A are pressed and held until the cylindrical body 12 is cured. The time required to cure the cylindrical body 12 can be arbitrarily set to, for example, 20 to 30 minutes depending on the curing agent mixed in the resin.

As shown in the perspective view of the main part of the cylindrical body 12 in FIG. 7 (a), for example, glass fiber such as glass roving cloth, glass chopped strand mat, glass cloth, glass surface mat, etc. is mixed with a curing agent. A resin layer 12a impregnated with an uncured resin, for example, an epoxy resin-based resin, an unsaturated polyester resin-based resin, or a methyl methacrylate resin-based resin is water-impermeable from both front and back surfaces and is a flexible film 12b. 7B to protect the resin layer 12a from intrusion of water and the like, and cut it into a rectangle of an appropriate size, and adhere both ends thereof with an adhesive, an adhesive tape or the like to form a tubular shape. ), A resin layer 12a of an appropriate size obtained by impregnating glass fibers with a resin in an uncured state is used to form an impermeable and flexible flap having a size larger than that of the resin layer 12a. The front and back surfaces are covered with the rum 12b, the periphery of the film 12b is bonded by heat welding or an adhesive agent, and the resin layer 12a is sealed to protect the resin layer 12a more reliably from water and the like. It can be obtained by bonding with an adhesive tape to form a tubular shape.

Further, as shown in FIG. 7 (c), a cylindrical resin layer 12a in which glass fiber is impregnated with an uncured resin
The cylindrical body 12 may be formed by covering the inner peripheral surface and the outer peripheral surface of the tube with a tubular water-impermeable and flexible film 12b and cutting the film to an appropriate length as shown by a broken line.

Further, as shown in FIG. 7 (d), the inner and outer peripheral surfaces of the cylindrical resin layer are completely sealed by a continuous water-impermeable and flexible film 12b to prevent the infiltration of water and the like. Then, the resin layer 12a can be formed so as to be protected.

A method of manufacturing the cylindrical body 12 shown in FIG. 7D will be described with reference to FIG.

First, as shown in FIG. 8 (a), a tubular film 1 which is formed into a tubular shape and is water-impermeable and flexible.
A cylindrical glass fiber 12c having a predetermined length on the outside of 2b,
It is fitted so that one end thereof is located substantially at the center of the longitudinal direction of the film 12b.

Next, the film 12b coated with the glass fiber 12c is placed on a cylindrical rotary jig 15, and the film is formed as shown in FIG.
As shown in (1), the glass fiber 12c is impregnated with an uncured resin 12d containing the above-mentioned curing agent to form a cylindrical resin layer 12a.

Subsequently, as shown in FIG. 8 (c), the film 12b is folded back and inverted to cover the cylindrical resin layer 12a with a continuous film on the inner and outer peripheral surfaces, and both ends of the polymerized film 12b are covered. The space between them is heat-welded as shown by a chain line in FIG.
It is also possible to obtain a cylindrical body 12 shown in FIGS. 8 (e) and 7 (d) by completely sealing it.

As described above, the cylindrical body 12 is inserted into a predetermined position by the mounting pipe expanding device 13 and held by opening the diameter, and after the resin layer 12a is cured, the mounting pipe expanding device 13 holds the cylindrical body 12. Is released and the pipe 12 to the mounting pipe expander 13
And the mounting pipe expander 13 is carried out from the mounting pipe basin 5 by the rope 14.

Even after the mounting pipe expander 13 is removed, the projection 12j made of the water-swellable material is formed by the tubular body 12 on the inner peripheral surface 4c of the second conduit 4 and the opening 8h of the rehabilitation cover 8. Of the base 8B and the sleeve 8A that form the base plate 8B is maintained in pressure contact with the opening end edge 8i of the sleeve 8A.
c, the base 8B and the opening end edge 8i of the sleeve 8A are maintained in the close contact state, as shown in FIG.

Next, the first conduit 1 opening to the manhole 3
By the cutting machine 16 introduced from one end of the first pipe 1
The end portion 12e of the cylindrical body 12 projecting into the rehabilitation cover 8 disposed inside is cut off and finish processing is performed. It is preferable that the cutting operation of the end portion 12e of the cylindrical body 12 and the confirmation after the cutting are performed by a monitor or the like using an image from the television camera 10.

The first conduit 1 formed as described above
As shown in the sectional view of FIG. 5, the water stop structure of the connecting portion 6 between the first pipeline 1 and the second pipeline 4 has a rehabilitation coating in the vicinity of the coupling section 6 of the first pipeline 1 and the second pipeline 4. The strength is improved by the body 8 and the cylindrical body 12, and the connecting portion 6 of the first conduit 1 is separated by the connecting portion 6.
Protruding annular projecting portions 8c are in close contact with the inner peripheral surface 1a in the vicinity of both ends of the rehabilitation covering 8, and these projecting ridges 8
This close state is maintained because c is formed by the water-swellable material.

Further, the cylindrical protruding portion 8j extending from the rehabilitation covering 8 is formed by the cylindrical body 12 on the inner peripheral surface 4 of the second conduit 4.
a, a base 8B forming the opening 8h of the rehabilitation cover 8
Also, since the protrusion 8j is pressed against the opening edge 8i of the sleeve 8A and the protrusion 8j is formed of the water-swelling material, the close contact is maintained.

Therefore, the ridges 8 of the water-swelling material disposed on the inner peripheral surface 1a of the first conduit 1 and the pipes at both ends of the rehabilitation cover 8.
c and the opening edge 8i of the rehabilitation cover 8 and the second conduit 4
The protrusion 8j of the water-swellable material disposed between the inner peripheral surface 4c and the cylindrical body 12 allows the gap a of the connecting portion 6 between the first pipe line 1 and the second pipe line 4 and the connecting portion. Groundwater or the like enters from the crack b generated in the vicinity and propagates through the gap between the first pipeline 1 and the rehabilitation cover 8 to the vicinity of the end of the rehabilitation cover 8 or the opening edge of the rehabilitation cover 8. Even when it reaches 8i, the protrusions 8c to 8j swell and a complete water blocking effect can be secured.

The ridges 8c and the protrusions 8j are covered with the first conduit 1, the second conduit 4, the rehabilitation cover 8 and the cylinder 12, and the resin layer 12a of the cylinder 12 is further covered. Since it is covered with the water-impermeable film 12b, the protrusions 8c, the protrusions 8j, and the resin layer 12a of the cylindrical body 12 are not exposed to corrosive gas or running water in the pipelines 1 and 4 and the like. Since the corrosion prevention and deterioration prevention are ensured, the stable water-stopping function can be maintained for a long period of time. Further, since the ridges 8c and the protrusions 8j are made of a water-swelling material, the connecting portion is subject to ground pressure, vibration, etc. Even when the deviations occur, the ridges and the projections 8j swell, and the water-stopping effect can be maintained.

In the above description, the protruding portion 8j is referred to as the second conduit 4
The inner peripheral surface 4a and the opening end edge 8i of the rehabilitation cover 8 were inserted into the expander 13 from the side of the mounting pipe sill 5 by inserting the cylinder 12 into the expander 13. It is also possible to install it.

The expander 17 for inserting the cylindrical body 12 from the inside of the first conduit 1 is, for example, as shown in the main part in FIG. 9, a rubber which is expanded and projected while being inverted from the main body 17a by the supply of compressed air. It is made of aluminum and has a cylindrical expansion part 17b.

As shown by the broken line, the uncured tubular body 12 is externally fitted to the inflating portion 17b housed in the main body 17a, and the expander 17 fitted with the tubular body 12 is attached to the first pipeline. 1 from one end of the expanded portion 17b to the open end 4 of the second conduit 4
It moves to a predetermined position facing a.

When the spreader 17 is moved, it is preferable to work while monitoring the image from the television camera on the monitor. Further, the spreader 17 fixes the cylindrical body 12 mounted on the spreader 17 to the rehabilitation cover 8. It is preferable in terms of work to have a function of rotationally positioning along the inner peripheral surface of the.

After moving to a predetermined position, compressed air is supplied to the expander 17 so that the inflating portion 17b having the tubular body 12 protruded along the second conduit 4 so that the tubular body 12 is covered by the rehabilitation cover. Insert the protruding portion 8j of No. 8 from the inside to the position where it is covered.

Further, compressed air is supplied to the expanding device 17 to open the diameter of the cylindrical body 12 by the expanding portion 17b, and the cylindrical body 12 is projected to the protruding portion 8b.
via j, the inner peripheral surface 4c of the second conduit 4 and the rehabilitation cover 8
It is pressed against the opening end edge 8i and held until the cylindrical body 12 is cured.

After the barrel 12 is hardened, the holding of the barrel 12 by the expanding machine 17 is released, the expanding portion 17b is housed in the main body 17a, and the expanding machine 17 is carried out from the first conduit 1.

In the above description, the inflating portion 17b is configured to project from the main body 17a while being inverted by compressed air, but it may be configured to project by other appropriate means such as expansion and contraction of the air cylinder.

[0046]

EFFECTS OF THE INVENTION According to the method and the structure for waterproofing the connecting portion of the pipeline described above, the water-swelling material is provided between the inner peripheral surface of the first pipeline and both ends of the rehabilitation cover. Since the projecting ridge portion and the bulging portion provided have a projecting portion that extends from the opening end of the rehabilitation cover to the second pipeline and is held by the tubular body, the first pipeline and the second pipeline are connected. Groundwater enters through the gaps between the parts and cracks near the joints and travels through the gap between the first pipeline and the rehabilitation cover, and near the end of the rehabilitation cover and the open end of the rehabilitation cover. Even if it reaches the edge, the ridge portion or the protrusion portion swells and a complete water-stopping effect can be secured, and since the ridge portion and the protrusion portion are covered with the respective conduits, the rehabilitation covering body and the cylinder body, These ridges and protrusions are protected from corrosion and deterioration without being exposed to corrosive gas or running water in pipelines. Can maintain a stable water stopping capability, further ground pressure, ridges and protrusions even if the connecting portion is moved by vibration or the like has an effect such as can maintain water stopping effect swells.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view illustrating an embodiment of a water blocking method for connecting portions of pipes according to the present invention.

FIG. 2 is likewise a schematic explanatory view of a water stopping method for connecting portions of pipes.

FIG. 3 is likewise a schematic explanatory view of a water blocking method for connecting portions of pipes.

FIG. 4 is likewise a schematic explanatory view of a water blocking method for connecting portions of pipes.

FIG. 5 is likewise a schematic explanatory view of a water stop construction method for a connecting portion of a pipeline, and an explanatory view of a water stop structure for a connecting portion of a pipeline.

FIG. 6 is an explanatory diagram of a rehabilitation cover used in this example.

FIG. 7 is an explanatory diagram of a cylinder used in this embodiment.

FIG. 8 is an explanatory diagram showing the outline of the manufacturing process of the cylindrical body used in the present embodiment.

FIG. 9 is an explanatory diagram of a water blocking method for connecting portions of pipelines in the present embodiment.

FIG. 10 is a schematic explanatory view of a conventional connecting member water blocking method.

[Explanation of symbols]

 1 1st pipeline 1a Inner peripheral surface 4 2nd pipeline 4c Inner peripheral surface 6 Connection part 8 Rehabilitation coating 8A Sleeve 8B Base 8c Projection 8h Opening 8i Opening edge 12 Cylindrical 12a Resin layer 12b Film 12c Glass fiber 12d Resin

Claims (4)

[Claims] 1. A water-swelling method for a connecting portion between a first pipeline and a second pipeline in which one opening end communicates with the middle of the first pipeline, in a water swelling property at both outer circumferences. A tubular and water-impermeable elastically deformable sleeve having a ridge portion of a material,
A cylindrical base that can be expanded in diameter inside the sleeve, an opening that penetrates the sleeve and the base corresponding to the opening end of the second conduit, and a cylindrical shape from the opening end edge. A rehabilitation covering having a projecting portion of a water-swellable material to be protruded is inserted into the first conduit, the protruding portion is fitted into the opening end of the second conduit, and then the rehabilitation covering. The base is expanded to hold the sleeve against the inner peripheral surface of the first conduit, and then the uncured cylindrical body is inserted into the cylindrical protrusion to maintain the expanded diameter, and the cylinder is expanded. By hardening the body, the projecting portion is sandwiched and held by the cylindrical body, the inner peripheral surface of the second pipeline, and the opening edge of the opening of the rehabilitation cover, and the water is blocked at the connecting portion of the pipeline. Construction method. 2. The method of waterproofing a pipe connecting portion according to claim 1, wherein the tubular body has a resin layer in which glass fiber is impregnated with a resin, and a water-impermeable film covering the resin layer. 3. A cylindrical body is obtained by fitting a cylindrical glass fiber onto the outer periphery of a cylindrical impermeable film and impregnating the glass fiber with an uncured resin containing a curing agent. The pipe line connection according to claim 1 or 2, which is formed by forming a resin layer, further inverting one end of the tubular film to cover the resin layer, and heat welding between ends of the film to be polymerized. Part water stop method. 4. A water-swelling structure of a connecting portion between a first pipeline and a second pipeline in which one opening end communicates with the first pipeline in the middle of the first pipeline. A tubular and water-impermeable elastically deformable sleeve having a ridge portion of a material,
A cylindrical base that is housed in the sleeve and expands in diameter to press and hold the sleeve on the inner peripheral surface of the first conduit, and penetrates the sleeve and the base corresponding to the opening end of the second conduit. A rehabilitation cover including an opening and a projection of a water-swelling material that is provided in a tubular shape so as to project from the opening end edge of the opening and fit into the opening end, and the projection is the second pipeline. A connecting portion water blocking structure, comprising: an inner peripheral surface and a cylindrical body that fits in a protruding portion that is held and held in cooperation with the opening end edge of the rehabilitation cover.