JP2012193759A - Water cut-off method and water cut-off structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cut-off structure without the risk of earth and sand intruding in a clearance produced in a conduit.SOLUTION: The water cut-off structure is for cutting off water leakage due to the clearance B produced in the conduit A laid underground. The structure includes a filling material 5 having elasticity and filled in the clearance B produced in the conduit A to make pressure act on a pipe 1 configuring the clearance B, a sleeve 6 which is disposed on the inner peripheral face side of the filling material 5, which is expansible, and which has a length longer than the dimension of the conduit of the filling material 5 in the length direction, and a ring 7 disposed on the inner peripheral face side of the sleeve 6 and configured to allow adjustment of the circumferential length. The circumferential length of the ring 7 is expanded to maintain a state in which the sleeve 6 is in press-contact with the inner peripheral face of the conduit A.

Description

  The present invention relates to a water stopping method and a water stopping structure for stopping water leakage from a gap generated at a joint of a pipe constituting a pipe line laid in the ground or a gap generated by a crack of the pipe. is there.

  Various pipes are laid in the ground. These pipes include pipes typified by sewer pipes where no pressure acts on them, water supply pipes through which water with high pressure circulates, agricultural water pipes, and industrial water pipes. There are roads. In the case of these pipe lines, there may be a gap due to a dropout at the joint of an embedded pipe due to ground subsidence or an earthquake, or a crack may be generated or the pipe may be cracked. When a gap occurs in the pipeline, there arises a problem that groundwater or earth and sand penetrates into the pipeline through the gap, or a fluid having a pressure flowing through the pipeline leaks outside the pipeline.

  For this reason, in the case of a pipeline where pressure does not act on the inside, the presence or absence of a gap is detected by observing the inner peripheral surface of the pipeline. Detecting the presence or absence of water leakage by detecting a change in sound due to the fluid flowing in the pipeline. And when the clearance gap which arises in the pipe line, the presence or absence of water leakage, and the water leakage location are detected, the clearance gap which has arisen in these clearance gaps and a water leakage location is closed and water stop is performed.

  In order to stop the water by closing the gap generated in the pipeline, it is common to place and fix a sleeve that closes the gap on the inner side of the pipeline. In particular, in a pipeline laid in the ground, there is a possibility that forces in various directions may act on the pipeline due to ground subsidence, earthquakes, etc., so that the sleeve is made of an expandable material. When no pressure is applied to the pipe, groundwater pressure is applied to the sleeve in the direction of the pipe, and when pressure is applied to the pipe, the pressure of the fluid is applied to the sleeve. Acts in the outward direction. Therefore, the sleeve that closes the gap is deformed by receiving a force on the inner side of the pipe line and on the outer side of the pipe line according to the magnitude and direction of the pressure acting on the sleeve.

  For example, the invention described in Patent Document 1 relates to an external water pressure compatible water stop device for closing a gap formed at the joint of a fume pipe. In this technique, an annular body provided with recesses on both end sides made of rubber is disposed at the joint between pipes, and an external hydraulic resistance plate formed in an Ω shape is attached to the convex part of the annular body, and the external hydraulic resistance plate By fitting the fixing parts on both sides of the two into the recesses, and further attaching and fixing the fixing plate configured to expand the diameter to the inner peripheral surface side of each fixing part, the annular body is attached to the inner peripheral surface of the pipe The water is stopped by pressure contact.

  In the above technique, the external hydraulic resistance plate is formed with continuous cuts in the fixed portion corresponding to the Ω-shaped bottom and the bent portion corresponding to the rising portion, and has a preset length. It is configured. Therefore, when it constructs with respect to a cyclic | annular body, it can mount | wear easily by making it bend the required number on the spot and making it continue.

  Also, the fixing plate is formed in a band shape, a plurality of adjustment holes are formed on one end side, a long hole is formed on the other end side, and both ends are overlapped to form a ring shape Has been. Then, the annular body can be brought into pressure contact with the pipe by expanding the diameter using a jack or the like so as to oppose both fixed portions of the external hydraulic resistance plate arranged on the inner peripheral surface side of the annular body. Is possible. Thereafter, by inserting a bolt into the elongated hole and the adjustment hole and fastening the ring with the diameter expanded, it is possible to keep the pressure contact state with respect to the inner peripheral surface of the annular tube and stop the water.

  In the technique described in Patent Document 1, the annular body pressed against the pipe side by two ring-shaped fixing plates can close the gap formed at the joint of the fume pipe to stop the water, and the external water pressure acts. Even if it does, an annular body does not deform | transform and does not inhibit the flow in a pipe line.

  In addition, the invention described in Patent Document 2 relates to a repair covering for stopping water in a gap generated in an existing pipeline such as a sewer pipeline. In this technique, the plate member is curved in a cylindrical shape and the end portions are opposed to each other, and the tubular member is externally fitted to the cylindrical body and is interposed between the cylindrical body and the inner peripheral surface of the pipe line. An annular elastic body, and after the cylindrical body and the annular elastic body are installed at a target position in the existing pipe line, the cylindrical elastic body is expanded in diameter to It is possible to stop the water by pressing on the inner peripheral surface of the pipe. In the technique described in Patent Document 2, a high water-stopping property can be ensured by bringing the annular elastic body into pressure contact with the inner peripheral surface of the pipe line by one cylindrical body.

  As described above, when an annular body made of an elastic body is fixed in pressure contact with the inner peripheral surface of the pipe, as described in Patent Document 1, two fixing plates (two rings) are used. As described in Patent Document 2, there is a configuration using one cylindrical body (one ring), which is adopted in accordance with the function of the pipeline to be applied.

JP 2004-278709 A JP 2005-214246 A

  However, the techniques described in Patent Documents 1 and 2 are not completely free of problems. When stopping the gap generated in the pipe line by these techniques, the mortar is filled prior to disposing the annular body or the annular elastic body on the inner peripheral surface side of the gap, but the filled mortar is dried. Accordingly, there is a problem in that it contracts and breaks away from the end face of the tube constituting the gap or breaks. In this case, the gap is filled with groundwater, earth and sand, and mortar pieces.

  A problem caused by the groundwater, earth and sand, and mortar pieces filling the gap generated in the pipe as described above will be described with reference to FIG. The pipe 50 shown in the figure assumes that water (pressure water) having an internal pressure flows like an agricultural water pipe. An annular body 51 is arranged on the inner peripheral surface side of the gap 53 generated in the pipe 50, and the annular body 51 is pressed against the inner peripheral surface of the pipe 50 by a fixing plate 52 whose both ends are expanded in diameter. Yes.

  Even if it is the pipe line 50 through which pressure water circulates, pressure water does not always circulate, and pressure is applied to the inside when performing maintenance work for the season or pipes where it is not necessary to supply water. There is no. Thus, in the state where the pressure water is not flowing through the pipe line 50, as shown in FIG. 10A, the gap 53 is filled with ground water, earth and sand, etc., and the annular body 51 depends on the acting ground water pressure. It is deformed to the inner side of the pipe line 50.

  The amount of deformation of the annular body 51 varies depending on the magnitude of the groundwater pressure, and also varies depending on the relative displacement of the pipes acting during ground subsidence or earthquake. For example, when the groundwater pressure rises, as shown in FIG. 4B, the deformation of the annular body 51 toward the inner side of the conduit increases, and accordingly, the inner peripheral surface of the conduit 50 and the annular body 51 A gap is formed between the outer peripheral surface, and earth and sand enter the gap. Sediment or the like that has entered the gap does not leave and maintains this state, and the annular body 51 is apparently reduced in size as both end portions move in the direction of the arrows. At this time, the fixed plate 52 rarely moves in the direction of the arrow at the same time, and the dimension of the overlapping portion of the fixed plate 52 and the annular body 51 becomes small.

  When pressure water is circulated through the pipe 50 from the above state, the annular body 51 is deformed toward the gap 53 as shown in FIG. At this time, although the earth and sand and mortar pieces entering the gap 53 are excluded, the earth and sand entering the gap is not excluded, and the annular body 51 has a large curvature due to the influence of the earth and sand. It will be deformed. For this reason, the overlapping dimension of the annular body 51 with the fixed plate 52 becomes smaller, and eventually the fixed state by the fixed plate 52 is released. In this case, water leakage from the gap 53 occurs.

  In particular, in the technique described in Patent Document 1, since the two fixing plates are attached with the convex portion of the annular body interposed therebetween, the movement in the direction approaching each other is restricted, but the movement in the direction separating from each other is restricted. Can be freely displaced without restriction. For this reason, there is a possibility that the fixed plate may be displaced from the initial mounting position and may be detached from the annular body.

  Further, the technique described in Patent Document 2 is advantageous when used for a pipe line in which no pressure acts inside. However, in the case of a pipe line through which pressure water flows, it is required to fix the annular body with one fixing plate for each of the pipes on both sides sandwiching the gap, and it cannot be applied to such a pipe line. There's a problem.

  An object of the present invention is to provide a water-stop method and a water-stop structure in which there is no risk of earth and sand entering a gap generated in a pipe, and the position of a ring that presses the sleeve against the inner peripheral surface of the pipe is displaced, or the sleeve It is in providing the water stop structure which does not detach from.

  In order to solve the above problems, the water stop method according to the present invention is a method for stopping water leakage due to a gap generated in a pipeline laid in the ground, and the gap is formed in the gap generated in the pipeline. Is filled with an elastic filler so that pressure is applied to the pipe, and the inner peripheral surface side of the filler has elasticity and is longer than the length of the pipe in the length direction of the pipe. A sleeve having a large length is disposed, and a ring configured to adjust the circumferential length is disposed on the inner peripheral surface side of the sleeve, and the circumferential length of the ring is enlarged to connect the sleeve to the tube. The water is stopped by being brought into pressure contact with the inner peripheral surface of the road and holding the ring in a state in which the circumferential length is enlarged.

  The water stop structure according to the present invention is a structure for stopping water leakage due to a gap generated in a pipeline laid in the ground, and pressure is applied to the pipe constituting the gap in the gap generated in the pipeline. An elastic filler filled so as to act, and a stretchability disposed on the inner peripheral surface side of the filler, and a length larger than the length of the filler in the longitudinal direction A sleeve configured to adjust the length of the circumference disposed on the inner circumferential surface side of the sleeve, and the sleeve is expanded by increasing the circumference of the ring. The water is stopped by maintaining a state where the pipe is pressed against the inner peripheral surface of the pipe.

  In the water blocking structure, the filler preferably further has water permeability.

  In any one of the water-stopping structures, the inner peripheral surface side of the filler filled so as to apply pressure to the pipes constituting the gap in the gap may be reinforced by a reinforcing material. preferable.

  In any one of the water stop structures described above, it is preferable that the ring is disposed at both ends of the sleeve in the length direction and opposed to the inner peripheral surface of the pipe.

  In addition, the second water stop structure according to the present invention has a stretchable structure that is opposed to the gap and has a stretchability to stop water leakage due to the gap generated in the pipe line laid in the ground. A sleeve having a length larger than the lengthwise dimension of the sleeve, and a ring capable of adjusting the circumference of each of the sleeves in the longitudinal direction of the sleeve. In a water stop structure configured to stop the water by enlarging the length and maintaining the state where the sleeve is in pressure contact with the inner peripheral surface of the pipe line, the sleeve is disposed at both ends in the length direction of the sleeve. The paired rings are connected and integrated in the length direction of the pipe line by a connecting member.

  In the present invention, the gap formed in the pipeline laid in the ground is filled with the filler so that pressure is applied to the pipe constituting the gap, and the sleeve is disposed on the inner peripheral surface side of the filler. Furthermore, by disposing a ring on the inner peripheral surface side of the sleeve and adjusting the circumferential length of the ring, the sleeve can be pressed against the inner peripheral surface of the pipe and water can be stopped. In particular, by filling the gap generated in the pipe line with the filler, it is possible to prevent sediment and mortar pieces (such as earth and sand) from entering the gap even when the gap directly faces the ground. Therefore, earth and sand do not enter between the inner peripheral surface of the duct and the sleeve, and deformation of the sleeve due to earth and sand can be prevented. For this reason, the sleeve is deformed according to the pressure of the groundwater pressure or the fluid (pressure fluid) having a pressure flowing inside, but is not deformed due to earth and sand or the like, and the sleeve can be prevented from coming off from the ring.

  By filling the gap generated in the pipe line with an elastic filler, when the pipes that sandwich the gap approach and come into contact with each other during ground subsidence or an earthquake, the pipes are positioned between the pipes. For this reason, the filler serves as a cushion, and it is possible to prevent damage to the pipe by preventing concentration of stress at the contact portion between the pipes. Further, it is possible to suppress the sleeve from being deformed toward the gap due to the internal pressure acting on the pipe line.

  In particular, since the filler has water permeability in addition to elasticity, it becomes possible to allow the groundwater to permeate through the sleeve when groundwater, earth and sand, etc. face the gap formed in the pipeline, and the filler has a special force. Does not work. For this reason, the function which makes a pressure act on the pipe | tube which comprises a clearance gap for a long period of time can be hold | maintained, without impairing the elasticity of a filler. Thus, in the case of the filler which has water permeability, it is advantageous to apply to the pipe line (pipe line laid deep underground) where a high underground water pressure acts.

  In addition, when the inner peripheral surface side of the filling material filled so as to apply pressure to the pipes constituting the gap is reinforced by the reinforcing material, when a high groundwater pressure acts on the filling material, It is possible to prevent the filler from falling to the inside of the pipeline. Further, when the pressure of the pressure fluid in the pipe line is applied to the sleeve, it is possible to prevent the sleeve from being deformed toward the gap and to prevent the filler from dropping from the gap.

  Further, the ring is disposed at both ends in the length direction of the sleeve and at a portion facing the inner peripheral surface of the pipe, so that the pipe on the both sides of the gap has an elastic filler and a stretchable sleeve. It will be connected via. For this reason, even when a relative deviation occurs in the pipe with the gap between them due to ground subsidence or an earthquake, this deviation can be absorbed to ensure the function as a pipeline.

  In another water-stop structure of the present invention, in order to stop water leakage due to a gap generated in a pipe line laid in the ground, the pipe has a stretchable length and is opposed to the gap. A sleeve having a length larger than the dimension in the direction is disposed, and rings each capable of adjusting the circumferential length are disposed at both ends in the longitudinal direction of the sleeve, and the circumferential length of the ring is further increased. In the water stop structure configured to expand and hold the state in which the sleeve is in pressure contact with the inner peripheral surface of the pipe line, a pair of sleeves disposed at both ends in the length direction of the sleeve Since the ring is connected and integrated by the connecting member in the length direction of the pipe line, even if the pair of rings is used for a long time, the initial position set at the time of construction can be maintained. Therefore, the ring is not detached from the sleeve, and stable water stopping performance can be ensured.

It is a front view explaining the water stop structure concerning a present Example. It is a figure explaining the water stop structure concerning a present Example, and is a II-II arrow line view of FIG. It is a figure explaining the other example of a water stop structure. It is a figure explaining the further another example of a water stop structure. It is sectional drawing explaining the example of a filler. It is sectional drawing explaining the example of a sleeve. It is a figure explaining the method to adjust the circumference of a ring. It is a figure explaining the example which connected a pair of ring with the connection member. It is a figure explaining the other example which connected a pair of ring with the connection member. It is a figure explaining a subject.

  Hereinafter, the water stop structure according to the present invention will be described, and the water stop method will be described.

  The water stop structure according to the present invention stops water leakage from a gap when a gap including a gap occurs between the pipes constituting the seam of the pipe line, or when a gap occurs due to a crack or breakage in a part of the pipe. Water. In particular, it is advantageous when the gap formed when the pipe line still has sufficient durability as a whole is partially stopped.

  Pipes targeted by the present invention include pipes that do not act on the inside of pipes for sewers, pipes for electric wires and communication lines, or pressures that contain agricultural water or industrial water inside. It includes a conduit such as a conduit through which the water (pressure fluid) it has circulated. Therefore, in the present invention, the structure of the pipe constituting the pipe line is not particularly limited, and the structure of the joint portion between the pipes is not particularly limited. The inner diameter of the pipe is not particularly limited, but is preferably a pipe that allows an operator to enter the inside and perform work.

  In the present invention, the “gap” is not limited to the one formed at the joint portion of the pipes, but includes a crack or breakage generated in any pipe constituting the pipe line. In short, the “gap” in the present invention includes all of seams, cracks, breaks, etc. that cause leakage of water into the pipeline of groundwater or leakage of water having pressure outside the pipeline.

  The gap generated in the pipe line is filled with an elastic filler so that pressure is applied to the pipes constituting the gap. This filler has a function of filling the gap generated in the pipe line so that pressure is applied to the end face of the pipe constituting the gap and preventing soil and sand from entering the gap.

  Filling an elastic filler so that pressure is applied to the pipes constituting the gap can be realized, for example, by pushing the elastic body into the gap in a compressed state. As described above, when the elastic body is compressed and filled in the gap, the filled elastic body tries to restore the initial shape, and pressure can be applied to the tube according to the restoring force.

  Moreover, it is realizable by inject | pouring a foaming agent into a clearance gap and making it foam. In this way, when the foaming agent is injected into the gap and foamed, it is possible to fill the gap and apply pressure to the tubes constituting the gap in the process of foaming the injected foaming agent. In particular, when the foaming agent has adhesiveness, it is preferable because it can adhere to the end face of the tube that sandwiches the gap and makes it difficult to leave the gap. An example of such a foaming agent is foamed urethane.

  As described above, the shape and properties of the elastic filler are not particularly limited, and may be a string shape or a band shape that can be filled by being pushed into the gap, and may be a foaming agent. . However, even when the filler is filled in such a way that pressure is applied to the pipes that make up the gap, the gap is widened due to long-term use, and the pressure acting on the pipe becomes smaller or affected by earthquakes. There is a risk of leaving.

  For this reason, as a filler, in addition to the filling part with which a clearance gap is filled, it is preferable that it is a shape which has a flange-shaped contact part which contacts the internal peripheral surface of a pipe line. When a filler having such a shape is used, the contact portion is positioned between the inner peripheral surface of the pipe line and the sleeve, and the filling portion is not detached from the gap, and a stable filling state is maintained. It becomes possible.

  As the contact portion, a T-shaped filler integrally formed with the filling portion may be formed. However, a band-shaped filler is used, the central portion of the filler is folded to fill the gap, and both end portions in the width direction of the band that cannot be filled in the gap are arranged along the inner peripheral surface of the pipeline By doing so, it is possible to exhibit the function as the contact portion. In this case, it is possible to set the width dimension of the band-shaped filler without corresponding to the dimension of the gap, and it is possible to expand the application range at the time of construction.

  Further, the filler may be formed in a long shape, or may be formed in a ring shape having a diameter corresponding to the inner diameter of the pipe line to be applied. When the filler is formed in a long shape, it can be cut according to the circumferential length of the gap to be filled, and the gap is formed in a part of the inner peripheral surface of the pipe It is advantageous to use. Further, the filler formed in a ring shape is advantageous when the gap is continuously generated over the entire circumference of the pipe line.

  The filler preferably has water permeability in addition to elasticity. By filling the gap formed in the pipe line with the filler having elasticity and water permeability, the groundwater permeates the filler and acts on the sleeve. Therefore, the filler is not affected by the underground water pressure and can retain elasticity for a long period of time. In the case of a filler having elasticity and water permeability, the pipeline is deeply laid in the ground, which is advantageous when applied to high groundwater pressure.

  Examples of the filler having elasticity and water permeability include a nonwoven fabric and a synthetic resin foam having continuous pores, and any of them can be preferably used. When these fillers are filled in the gap, even if the earth and sand are about to penetrate into the gap, the non-woven fabric and foam are clogged with the earth and sand, and as a result, the filter functions as a filter that prevents the sand from entering the gap. It is possible to demonstrate.

  When a nonwoven fabric is used as the filler, natural fibers such as plant fibers and animal fibers, and synthetic fibers such as polyester (PE) and polyamide (PA) can be used as the fibers constituting the nonwoven fabric. For example, in the case of a nonwoven fabric made of PE, since the eyes are extremely small, it can function as a filter and prevent earth and sand from entering the gap. Similarly, in the case of PA, the eyes are extremely small, so that the function as a filter is exhibited, and it is possible to prevent the earth and sand from entering the gap. Furthermore, since PA has water swellability, it can be swollen by groundwater, and a greater pressure can be applied to the pipes that sandwich the gap. In particular, even when the gap is larger than expected, it is possible to apply pressure by following the spread of the gap.

  It is not limited to filling the filler alone with respect to the gap generated in the pipeline, and when the width dimension of the gap is large, it is preferable to fill the core material as a core in addition to the filler. . That is, when the width dimension of the gap is increased, it is difficult to maintain the filled state for a long period of time when the elastic filler is filled in a compressed state, and sufficient pressure is applied to the end face of the tube. There is a risk that it will be difficult to act.

  In particular, when the filler is formed in a band shape, when the gap is folded when filling the gap in a compressed state, the number of times of folding occurs, and when the number of folding is increased, the woven portion is There is a risk of jumping out of the gap.

  For this reason, the core material corresponding to the size of the gap and the size of the filler is filled in the gap so as to be embedded in the band-shaped filler, thereby maintaining the filled state and the pressure action on the pipe by the filler. It can be realized. In particular, when the width dimension of the gap generated in the pipeline is not uniform in the circumferential direction of the pipeline, for example, when the axis of the pipe constituting the pipeline is bent starting from the gap, the width is wide. By using a core material corresponding to the gap, it is possible to stably realize the filling state and the action of the pressure on the pipe despite the gap width being different.

  It is preferable that the filler filled in the gap generated in the pipe line is reinforced by the reinforcing material on the inner peripheral surface side. By reinforcing with the reinforcing material in this way, even when a high groundwater pressure acts on the filler, it is possible to prevent the filler from falling from the gap, and the pressure that circulates in the pipeline through the sleeve Even when the pressure of the fluid acts, it is possible to prevent the sleeve from being deformed toward the gap and to prevent the filler from dropping from the gap.

  The reinforcing material that reinforces the filler has a function of preventing the filler filled in the gap from dropping from the gap. That is, when a high groundwater pressure acts on the filler, the filler moves to the inside of the pipe, but the reinforcing material can prevent this movement and prevent the filler from falling. In addition, when a pressure fluid such as agricultural water flows in the pipe, the sleeve is deformed to the gap side under this pressure, and the filler is pushed out from the gap along with this deformation. It is possible to prevent the fall of the filler from the gap by preventing the deformation.

  The reinforcing structure and the reinforcing material for the filler are not particularly limited. For example, a metal net or plate, a synthetic resin net or plate, a sheet made of glass fiber, or a plate is formed. It is possible to selectively adopt those that have been made. In particular, it is preferable that the reinforcing material has such a degree of flexibility that allows the displacement to be followed without being damaged when a relative displacement occurs in the tube that sandwiches the gap.

  Further, it is not particularly limited whether the selected reinforcing material is reinforced by being integrated with the filler by bonding or the like, or is reinforced with the filler, and the reinforcing material has elasticity. It is possible to realize a sufficient reinforcing structure by adding to the filler.

  The sleeve arranged on the inner peripheral surface side of the filler filled in the gap generated in the pipe line has stretchability and a dimension (width dimension) sufficiently larger than the width dimension of the filler. The material of the sleeve is not particularly limited, and elastic rubber, synthetic resin, or the like can be selectively employed. Further, since the sleeve is disposed so as to face the gap and directly prevents water leakage, it naturally has water permeability.

  The stretchability of the sleeve is not limited numerically. However, it is preferable to be able to follow this movement even if there is a relative movement on both sides of the gap due to pipe displacement or cracks that may occur during subsidence or an earthquake. . Examples of the material constituting the sleeve include synthetic rubber such as styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene propylene diene rubber (EPDM), and natural rubber ( NR) and any of them can be preferably used.

  The ring arranged on the inner peripheral surface side of the sleeve is configured to be able to adjust the circumferential length. That is, the ring is configured such that a part of the cylinder is cut off and the cut ends are opposed to each other in abutting state, or the both ends are overlapped with each other. Therefore, it is possible to expand the circumference (peripheral length) of the ring (expansion of diameter, diameter expansion) by widening the distance between the separated ends.

  In the ring, after being arranged on the inner peripheral surface side of the sleeve, it is possible to press the sleeve with the entire ring and press the inner peripheral surface of the pipe line by enlarging the circumference of the ring. . And by keeping this state, it is possible to ensure water stopping.

  Therefore, any structure having such a function can be used as a ring. A structure for adjusting the circumference, that is, a method for expanding the circumference, or a state in which the circumference is enlarged. There is no limitation on the method for maintaining the value.

  As a method of expanding the circumference of the ring, a method of driving a wedge between both ends of the ring, a method using a jack engaged with a locking portion provided in the vicinity of both ends of the ring, There is a method such as a method using a nut in which a bolt in the chord direction is provided in the vicinity of one end of the ring cut off and a long hole through which the bolt is inserted is screwed into the bolt. Any of these can be employed.

  In addition, as a method of maintaining the state in which the circumference of the ring is enlarged, there is a method of inserting a wedge piece between the two separated end portions when they are formed to face each other in abutting state. When both ends are overlapped with each other, there is a method of fastening the overlapped portions with bolts, and any of them can be adopted.

  The number of rings arranged on the inner peripheral surface side of the sleeve is not particularly limited, and may be one or more. For example, when one ring is arranged, it is preferable that the width dimension of the ring (dimension in the length direction of the pipe line) is substantially equal to or smaller than the width dimension of the sleeve. Since the ring has such a width dimension, the sleeve can be surely brought into pressure contact with the inner peripheral surface of the pipe line even when the peripheral length is increased after being arranged on the inner peripheral surface side of the sleeve. Is possible.

  Alternatively, a ring may be arranged on each of the inner peripheral surface side of the sleeve and on both end sides in the width direction so that the sleeve is pressed against the inner peripheral surface of the pipe line. In this way, by disposing the rings on both ends in the width direction of the sleeve, the pressure contact position of the sleeve with the inner peripheral surface of the pipe line sandwiches the gap, and the relative movement of the pipe across the gap is suppressed. It is possible to ensure a degree of freedom.

  It is not limited whether or not there is a contact portion between the sleeve and the filler between the ring and the inner peripheral surface of the pipe line when the ring is disposed on both ends in the width direction of the sleeve. That is, the end of the contact portion of the filler and the sleeve are overlapped, and a ring is disposed at a portion facing the end of the contact portion to increase the circumference, so that the end of the contact portion and the sleeve May be simultaneously pressed against the inner peripheral surface of the pipe.

  Further, it is not particularly limited whether or not the ring is arranged at a portion where the reinforcing material for reinforcing the filler filled in the gap and the sleeve are overlapped.

  When configured as described above, the filler is restrained by being sandwiched between the inner peripheral surface of the pipe and the sleeve by the force from the ring acting through the contact portion, and the degree of freedom of movement is reduced. . Moreover, even if relative movement occurs between the tubes sandwiching the gap, the filler does not leave the gap. In addition, even when groundwater penetrates into the filler, the sleeve adjacent to the contact portion is in pressure contact with the inner peripheral surface of the pipe, so that sufficient water stoppage can be ensured and water leakage does not occur. .

  Alternatively, a part of the contact portion and the sleeve may be overlapped, and a ring may be disposed at a portion where only the sleeve exists, so that only the sleeve may be pressed against the inner peripheral surface of the pipe line. In this case, since the filler does not directly receive the force from the ring, it has a degree of freedom of movement. For this reason, it may move with the relative movement of the pipe which pinches a gap at the time of ground subsidence or an earthquake. However, since the sleeve receives the force of the ring and is in pressure contact with the inner peripheral surface of the pipe line, water does not leak even if the filler moves.

  In the second water stop structure according to the present invention, the rings are arranged on both ends in the width direction of the sleeve, and these rings are connected and integrated in the longitudinal direction of the pipe line by the connecting members. Prevents the ring from being detached from the sleeve and changes in posture, thereby ensuring stable water stopping performance.

  As described above, the connecting member only needs to have a configuration capable of exhibiting a function of connecting and integrating a pair of rings, and does not limit the configuration. As a configuration capable of exhibiting such a function, for example, a pin is provided on the side surface of the ring, and a belt-like member is fitted and integrated with the pin, and a protrusion is provided on the sleeve side surface of the ring. There are configurations such as a configuration in which a band-shaped member is engaged with the protrusion and integrated, and these can be selectively employed.

  Next, a first embodiment of a water stop structure will be described with reference to FIGS. In the figure, a gap B is formed in a pipe line A laid in the ground. In this embodiment, the pipe A is configured as a sewer pipe, and is configured by connecting a plurality of fume pipes 1 in series. In the sewer pipe A, the adjacent pipes 1 are connected to each other by fitting the end of the other pipe 1 into the insertion part formed at the end of the one pipe 1.

  In the present invention, the gap B is a gap that causes water leakage or has a risk of water leakage. Therefore, the gap B exists as a joint of the pipe 1 constituting the pipe A or as a crack or a fracture portion generated in the pipe 1 due to a ground subsidence or a force acting during an earthquake. There is a case where it occurs over a part of the circumference of the tube 1.

  The water stop structure according to the present embodiment is disposed on the inner peripheral surface side of the filler 5 having elasticity and water permeability filled in the gap B generated in the pipe 1 constituting the pipe A. A sleeve 6 having elasticity and a width dimension larger than the dimension of the filler 5 in the width direction, and a ring 7 arranged on the inner peripheral surface side of the sleeve 6 so as to be able to adjust the circumference. And the water is stopped by expanding the circumferential length of the ring 7 and holding the sleeve 6 in pressure contact with the inner circumferential surface of the tube 1.

  Several examples of filling the gap B with the filler 5 will be described with reference to FIGS.

  As shown in FIG. 2, the gap B is filled with a filler 5 having elasticity and water permeability so as to apply pressure to the tube 1. That is, the filler 5 is filled in the gap B in a state where the volume is reduced by being sufficiently compressed from a free state. For this reason, a part of the filler 5 protrudes from the gap B to the ground side. However, whether or not the filler 5 protrudes to the ground side is not limited as long as the filler 5 sufficiently enters the gap B. For example, when the filler 5 protrudes to the ground side, the protruding portion serves as a plug for the gap B, and it is possible to prevent the filler 5 from being detached.

  In this embodiment, a non-woven fabric is used as the filler 5. And when filling the gap B with the filler 5 made of non-woven fabric, it is preferable to remove the earth and sand, the mortar pieces (such as earth and sand) existing in the gap B before the filling.

  By filling the gap B with the filler 5 as described above, the filler 5 applies pressure to the tube 1 in an attempt to restore the initial free state, and maintains its position by the pressure applied at this time. It is possible.

  Further, the groundwater existing around the pipe A can permeate the gap B, and the groundwater pressure of the groundwater does not cause the action of pressing the filler 5 against the pipe 1 and the sleeve 6, and the sleeve Acts directly on 6. And when earth and sand etc. try to enter with the penetration | invasion to the clearance gap B of groundwater, this earth and sand are blocked | prevented by the filler 5. FIG. Therefore, even if earth or sand is present at the portion of the filler 5 facing the ground, it does not enter the back of the gap B.

  FIG. 3 shows an example in which the reinforcing material 8 is arranged on the inner peripheral surface side of the filler 5 filled in the gap B. FIG. Thus, by reinforcing the filler 5, even when a groundwater pressure acts on the filler 5, it is possible to prevent the filler from falling into the pipe line due to the groundwater pressure. Further, in the case where the pipeline A is one in which pressure water such as agricultural water or industrial water circulates, the sleeve 6 is prevented from being deformed by the pressure acting on the sleeve 6, and the filler 5 is prevented from dropping from the gap B. It is possible to prevent.

  In this embodiment, a flexible plastic plate having a thickness of about 3 mm is used as the reinforcing member 8.

  In FIG. 4, since the width of the gap B is large, when the gap B is filled by combining the filler 5 and the core material 12, sufficient pressure is applied to the tube and the filling state is stabilized for a long period of time. It is what I did.

  The filler 5 needs to be filled between at least the end face of the tube 1 of the core material 12. However, it is not preferable from the viewpoint of workability to fill the filler 5 only between the core material 12 and the tube 1. For this reason, the filler 5 is filled between the core 12 and the pipe 1 by arranging the filler 5 so as to wrap the three surfaces of the core 12. Thus, even when the filler 5 is filled between the core material 12 and the tube 1, the pressure is applied to the tube 1 by the filled filler 5 as in the above example.

  The core material 12 has a dimension (width dimension) and a thickness dimension (pipe 1) along the longitudinal direction of the pipe A according to the width dimension of the gap B and the dimension of the filler 5 (thickness of the filler 5). Of the thickness direction) is set. That is, the width dimension of the core material 12 is set in accordance with the width dimension of the gap B and the dimension during compression so that the filler 5 can exert a sufficient pressure.

  In particular, when the width dimension of the gap B is not uniform in the circumferential direction, there should be a part that can be filled with the filler material 5 without the core material 12 and a part that requires the core material 12. There is. For this reason, the width dimension of the core material 12 is not uniquely set, and it is preferable to selectively use a plurality of types having different thicknesses.

  Such a core material 12 is not limited in material, and is preferably wood, metal, a synthetic resin plate, square, or round bar. In particular, when the diameter of the target tube 1 is determined, it is advantageous to use arcuate wood or synthetic resin. Moreover, if it is the metal material which has sufficient flexibility as the core material 12, it will become possible to apply to the pipe | tube 1 from which a diameter differs, and it is advantageous.

  In FIG. 4, the reinforcing material 8 is disposed on the inner peripheral surface side of the filler 5 and the core material 12 filled in the gap B, but the reinforcing material 8 is not always necessary.

  The shape of the filler 5 is not limited to that shown in FIG. 2, and can be formed into several shapes as shown in FIG. For example, as shown to Fig.5 (a), the filler 5 may be formed in the string shape which has elasticity. In the filler 5 formed in this way, the gap B can be filled regardless of the circumferential length of the gap B generated in the pipe 1.

  The filler 5 shown in FIG. 5 (b) has a filling portion 5 a formed in a protruding shape and a flange portion 5 b serving as a contact portion that contacts the inner peripheral surface of the tube 1. The filler 5 may be formed in a long band shape, or may be formed in a ring shape having a diameter corresponding to the inner diameter of the pipe 1 constituting the corresponding pipe line A in advance.

  The filler 5 shown in FIG.5 (c) is reinforced by the reinforcing material 8 in which the flange part 5b was arrange | positioned at the inner peripheral surface side.

  The sleeve 6 disposed on the inner peripheral surface side of the filler 5 has elasticity and has sufficient elasticity. The sleeve 6 has a width dimension sufficiently larger than the dimension in the width direction of the filler 5, and when arranged on the inner peripheral surface side of the flange portion 5 b constituting the filler 5, the flange 6 of the filler 5 It is comprised so that it may not cover and expose the part 5b. In this embodiment, the sleeve 6 is formed by EPDM.

  As shown in FIG. 6, the sleeve 6 has a plurality of protrusions 6 a formed on the outer peripheral surface at both ends in the width direction, and the reinforcing material 8 disposed on the inner peripheral surface side of the filler 5 at the center in the width direction. The recessed part 6b which accommodates is formed. A recess 6c that accommodates the ring 7 is formed at a position corresponding to the protrusion 6a on the inner peripheral surface of the sleeve 6. The concave portion 6b is not necessarily required, and is not necessary when the sleeve 6 is directly arranged without arranging the reinforcing material 8 on the inner peripheral surface side of the filler 5 as shown in FIG. It is.

  The outer diameter of the sleeve 6 has a dimension corresponding to the inner diameter of the tube 1 to be applied in advance, and the protrusion 6a directly contacts the inner peripheral surface of the tube 1 and presses with the increase in the peripheral length of the ring 7. Thus, the water stop performance can be secured. Therefore, by accommodating the ring 7 in the recess 6c corresponding to the protrusion 6a, the protrusion 6a can be sufficiently brought into pressure contact with the inner peripheral surface of the tube 1.

  Further, since the filler 5 is accommodated in the recess 6 b of the sleeve 6, even when the circumferential length of the ring 7 is increased, the force of the ring 7 does not act directly on the flange portion 5 b of the filler 5. Therefore, although the filler 5 is pressed to the inner peripheral surface side of the pipe 1 through the sleeve 6, it does not come into pressure contact with a high force and has a slight freedom of movement.

  Note that it is not always necessary to form the recess 6b in the sleeve 6, and the portion other than the protrusion 6a may be a flat surface. However, if the thickness of the contact portion of the filler 5 or the thickness of the reinforcing member 8 disposed on the inner peripheral surface side of the reinforcing member 5 increases, when the sleeve 6 is pressed by the two rings 7, A portion corresponding to the filler 5 and the reinforcing material 8 swells toward the inner peripheral surface of the tube 1, which may increase the fluid resistance.

  In the present embodiment, the ring 7 is formed with a notched portion in which a part of a cylinder having a diameter corresponding to the inner diameter of the tube 1 to be applied is cut, and is applied in a free state before construction. Both end portions are kept close to each other so that the outer diameter is smaller than the inner diameter of 1. Therefore, it is possible to easily move the ring 7 to the position where the pipe 1 should be stopped. And after enlarging the circumference of the ring 7, it is comprised so that the state where the circumference has expanded can be hold | maintained by inserting the wedge piece 9 in a notch part.

  As shown in FIGS. 1 and 7, restraint pieces 7a for restraining the wedge pieces 9 are welded to the inner peripheral surface side at both ends in the circumferential direction of the ring 7, and in the vicinity of these restraint pieces 7a. A locking piece 7b for locking the jack 10 is welded.

  The wedge piece 9 is formed so that the thickness and width are the same as or slightly smaller than those of the ring 7, and the length (the circumferential dimension of the tube 1) is sufficient to force the sleeve 6 to the tube. It is set to a dimension capable of holding the enlarged peripheral length of the ring 7 necessary for press contact with the inner peripheral surface of the one. Therefore, the length of the wedge piece 9 does not necessarily match the dimension of the notch when the ring 7 is made into a substantially perfect circle. Moreover, although the both end surfaces of the length direction of the wedge piece 9 may be parallel, it does not necessarily need to be parallel and may be a wedge shape with one end surface or both end surfaces having a gradient.

  When enlarging the circumference of the ring 7, the locking blocks 10a provided at both ends of the jack 10 are locked to the locking pieces 7b of the ring 7. In this state, pressure oil is supplied to the jack 10 to extend the rod 10b. Is done. As the rod 10b extends, the peripheral length of the ring 7 increases, and the sleeve 6 is pressed against the inner peripheral surface of the tube 1. Then, when the circumferential length of the ring 7 is sufficiently enlarged and the distance between both ends becomes larger than the length of the wedge piece 9, the wedge piece 9 is inserted into the cutout portion, so that the circumference of the ring 7 is increased. It is possible to maintain a long expanded state.

  In the water stop structure configured as described above, even if the earth and sand infiltrate as groundwater penetrates into the gap B by filling the gap 5 with the filler 5, the earth and sand penetrates into the gap. It is possible to prevent getting into the back. For this reason, it is possible to always keep the direct contact between the inner peripheral surface of the tube 1 and the outer peripheral surface of the sleeve 6 and to keep the both directly in contact with each other, without causing excessive deformation of the sleeve 6. The initial shape can be maintained.

  Next, the construction method for constructing the water stop structure as described above will be briefly described. Prior to the start of the water stop method, a gap B that occurs in the pipe A (pipe 1) and actually leaks or has a risk of leaking is detected.

  Next, pre-processing is performed on the detected gap B. This pretreatment is to make it possible to smoothly perform the water stop construction for the gap B and to exhibit a stable water stop performance for as long as possible. For this reason, when the earth and sand etc. which exist in the clearance gap B, and the root of a tree are excluded, and the extreme unevenness | corrugation has arisen in the end surface of the pipe | tube which comprises the clearance gap B, it is substantially uniform when the filler 5 is filled. The end surface is flat so that pressure can be applied to the surface.

  After the pretreatment is completed, the filler 5 is filled into the gap B. In particular, when the filler 5 is formed in a long strip shape, the filler 5 is folded in half at the center and the folded portion is compressed, and the compressed portion is pushed into the gap B and filled. Apply pressure to At this time, when all the fillers 5 are filled in the gap B, the both ends of the filler 5 in the width direction are exposed from the gap B without being filled in the gap B. In the state where both ends in the width direction are in contact with the inner peripheral surface of the tube 1 and the reinforcing material 8 is disposed on the inner peripheral surface side of the filler 5, the sleeve 6 is placed inside the tube 1. The filler 5 is inserted and placed in the recess 6 b of the sleeve 6. As described above, it is natural that the recess 6b is not necessary.

  The arrangement state of the sleeve 6 with respect to the inner peripheral surface side of the filler 5 is maintained, and the ring 7 is carried into the tube 1. After the two rings 7 are accommodated in the recesses 6 c of the sleeve 6, the circumferential length of each ring 7 is expanded using the jack 10, and the wedge pieces 9 are inserted into the gaps at both ends in the circumferential direction of the ring 7. Remove the jack 10. By removing the jack 10, the circumference of the ring 7 is slightly reduced, and the wedge piece 9 is sandwiched to maintain the enlarged circumference.

  By carrying out the above construction method, the ring 7 can maintain an enlarged circumferential length, and the protrusion 6a of the sleeve 6 can be pressed against the inner peripheral surface of the tube 1 to ensure water-stopping performance. .

  Next, the water stop structure according to the second embodiment will be described with reference to FIGS. In the water stop structure shown in the figure, a ring is arranged on each inner peripheral surface at both ends in the width direction of the sleeve 6, and these rings are connected by a connecting member so that movement of the ring and from the sleeve 6 can be prevented. It is intended to prevent withdrawal.

  As shown in the figure, the gap B formed in the pipe A (tube 1) is not filled with a filler. However, it is natural that the gap B may be filled with the same filler 5 as in the previous embodiment.

  As shown in FIG. 8, the elastic sleeve 6 is disposed on the inner peripheral surface side of the gap B, and the ring 15 is disposed on the inner peripheral surface on both ends in the width direction of the sleeve 6. Yes. A plurality of connecting members 16 are disposed between the ring 15 and the sleeve 6, and the pair of rings 15 are connected to each other by the connecting member 16. That is, the pair of rings 15 are connected in the length direction of the pipe line A by the connecting member 16.

  Protrusions 15a are formed on the outer peripheral surface of the ring 15 (the surface facing the sleeve 6) over the entire circumference, and the protrusions 15a are provided on both ends of the connecting member 16 in the length direction (the length direction of the pipe line A). Receiving recesses 16a are respectively formed. Then, after the sleeve 6 is disposed on the inner peripheral surface of the tube 1, when the pair of rings 15 are disposed on the inner peripheral surface, the connecting member 16 in a state in which the protrusions 15a of the respective rings 15 are received in the recesses 16a in advance. Can be arranged on the inner peripheral surface side of the tube 1 in the order of the sleeve 6, the connecting member 16, and the ring 15.

  After arranging the pair of rings 15 connected by the connecting member 16 as described above on the inner peripheral surface side of the sleeve 6, the circumferential length of the ring 15 is enlarged and the expanded state is the same as in the previous embodiment. By holding it, it is possible to hold the connection state of the pair of rings 15. In particular, since the ring 15 has the protrusions 15a over the entire circumference, a force concentrated by the protrusions 15a is applied to the sleeve 6 as the circumference increases, so that high water stopping performance can be ensured.

  As described above, by maintaining the state in which the pair of rings 15 are connected by the connection member 16, the tube 1 sandwiching the gap B during ground subsidence or an earthquake moves relatively, and even when the sleeve follows this movement, The pair of rings can maintain a distance from each other. For this reason, the pair of rings 15 are not bound to each other and move freely, and therefore the ring 15 does not separate from the sleeve 6.

  In this embodiment, the protrusions 15a provided on the ring 15 do not necessarily have to be formed over the entire circumference, and may be provided as spherical protrusions at a plurality of preset positions. In this way, by forming a spherical protrusion on the ring 15 and forming a recess so that the connection member 16 receives the protrusion, the degree of freedom of relative movement of the tube 1 across the gap B can be improved. Is possible.

  The connecting member 16 may be made of metal or synthetic resin, and the material is not limited.

  As shown in FIG. 9, rings 18 are respectively arranged on the inner peripheral surfaces of both ends in the width direction of the sleeve 6, and pins 19 are erected at a plurality of positions facing these rings 18. A pair of rings 18 are connected to each other by attaching a connecting member 20 to the pin 19.

  By connecting the pair of rings 18 with the connecting member 20 as described above, the pipe 1 sandwiching the gap B during ground subsidence or an earthquake moves relatively, and even if the sleeve follows this movement, the pair of rings 18 It becomes possible for 18 to hold | maintain a mutual space | interval. For this reason, the pair of rings 18 are restrained from each other and do not move freely, and these rings 18 do not separate from the sleeve 6.

  In particular, since the connection member 20 is inserted into the pin 18 provided in the ring 18, the connection member 20 can rotate around the pin 19, and the tube 1 relative to the gap B is sandwiched. It is possible to improve the freedom of movement.

  In the present embodiment, the number of connection members 16 and 20 that connect the pair of rings 15 and 18 is not limited, and is preferably set as appropriate according to the inner diameter of the tube 1.

  The water stop structure according to the present invention is a water leak point in all the pipes laid in the ground, such as a pipe line where atmospheric pressure acts inside, a pipe line through which a fluid having pressure flows, and the like. It is advantageous to use.

A Pipeline B Clearance 1 Pipe 5 Filler 5a Filling part 5b Flange part 6 Sleeve 6a Projection 6b, 6c Recess 7 Ring 7a Restraint piece 7b Locking piece 8 Reinforcing material 9 Wedge piece 10 Jack 10a Locking block 10b Rod 12 Core material 15, 18 Ring 15a Protrusion 16, 20 Connection member 16a Recess 19 Pin

Claims (6)

A construction method for stopping water leakage due to a gap generated in a pipeline laid in the ground,
Filling the gap formed in the pipeline with an elastic filler so that pressure is applied to the pipe constituting the gap,
Arranging a sleeve having stretchability on the inner peripheral surface side of the filler and having a length larger than the lengthwise dimension of the conduit of the filler;
A ring configured to adjust the circumferential length on the inner circumferential surface side of the sleeve and expanding the circumferential length of the ring to press the sleeve against the inner circumferential surface of the pipe;
The water stop construction method is characterized in that water is stopped by holding the ring in a state in which the circumference is enlarged. A structure for stopping water leakage due to a gap generated in a pipe laid in the ground,
An elastic filler filled in such a manner that pressure is applied to the pipe constituting the gap in the gap generated in the pipe;
A sleeve having stretchability disposed on the inner peripheral surface side of the filler and having a length larger than the dimension of the filler in the longitudinal direction;
A ring configured to adjust the length of the circumference disposed on the inner peripheral surface side of the sleeve,
The water stop structure is characterized in that the water is stopped by enlarging the circumference of the ring and holding the sleeve in pressure contact with the inner peripheral surface of the pipe.   The waterstop structure according to claim 2, wherein the filler further has water permeability.   The water stop according to claim 2 or 3, wherein an inner peripheral surface side of the filler filled so as to apply pressure to the gap constituting the gap is reinforced by a reinforcing material. Construction.   The water stop structure according to any one of claims 2 to 4, wherein the ring is disposed at both ends of the sleeve in the length direction and opposed to the inner peripheral surface of the pipe line. . In order to stop water leakage due to a gap generated in a pipe line laid in the ground, the pipe has a stretchability opposed to the gap and has a length larger than the dimension of the gap in the length direction of the pipe line. A ring is arranged, and a ring capable of adjusting the circumferential length is arranged at both ends in the longitudinal direction of the sleeve, and further, the circumferential length of the ring is expanded to place the sleeve in the pipe line. In the water stop structure configured to stop water by holding the state pressed against the peripheral surface,
A water stop structure characterized in that a pair of rings arranged on both ends in the length direction of the sleeve are connected and integrated in the length direction of the pipe line by a connecting member.

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