JP4953339B2 - Water stop structure and manufacturing method thereof - Google Patents

Description

The present invention relates to buried pipes such as pipelines and cable pipes buried in the ground or the seabed, tunnels, box culverts, and other structures, which can withstand earth pressure and water pressure after being buried, and can be used for soil such as during an earthquake. Water stop structure that can flexibly cope with deformation in the inside and prevent breakage and cracking of the flexible part formed in the middle of the end part or in the longitudinal direction, and can ensure airtightness and watertightness, and its It relates to a manufacturing method .

Conventionally, fume pipes are generally used as buried pipes for sewers, drainage channels, etc., but the fume pipes cannot cope with various displacements and vibrations such as bending and eccentricity caused by ground fluctuations or earthquake fluctuations. For this reason, even if a part of the tube is broken or does not lead to breakage, the end of the fume tube may be damaged or cracked. And this may cause flooding or leakage. In order to prevent the fume pipe from being damaged, flooded or leaked due to ground fluctuation or earthquake, a flexible joint made of a flexible material such as rubber or synthetic resin is used at the connecting portion of the adjacent fume pipe.
In addition to buried pipes, various structures such as tunnels and box culverts have been studied for water-stopping structures for joints that do not cause a rupture accident due to a large displacement.
For example, in (Patent Document 1), “having an elastic body having a shape corresponding to a gap between members to be water-stopped, a water expansion body storage area is formed inside the elastic body, and a water expansion body storage area includes water A seal that is configured by disposing a water expandable body that is inflatable by contact with the.
In addition, (Patent Document 2) states that, in an excavated underground structure that is embedded in the ground and constructed with a joint provided for each unit length to follow the displacement of the ground, the outer periphery of the joint serving as the joint is A structure in which a water-swelling water-stopping rubber is applied in a band shape across the joints across the joints to seal the outer periphery of the joints, and the outer peripheral surface of the water-swelling water-stopping rubber is covered with a protective steel plate An excavated underground structure characterized by the above. "
JP-A-6-27296 Japanese Patent Application Laid-Open No. 2004-92288

However, the above conventional techniques have the following problems.
(1) Conventionally, when airtightness and watertightness are required at a location with deformation, a rubber material having elasticity is generally used as a water-stopping material. It is difficult to ensure adhesion with the joint, and it cannot cope with a joint having a complicated shape, so that there is a problem that versatility and reliability are lacking.
(2) The seal of (Patent Document 1) is a member to which the elastic body should be water-stopped while following the expansion and contraction of the width of the member gap to be water-stopped by elastic deformation of the elastic body in a normal state. Sealing the gap, and if the elastic body breaks, the gap formed by the breakage of the elastic body is expanded by the contact of the water expansion body with water, and the member gap is sealed. However, since the elastic body is a molded product similar to the conventional one, it is difficult to ensure sufficient dimensional accuracy, and if there is a gap between the joint and the elastic body, even within the range of elastic deformation There was a problem that water tightness could not be secured.
In addition, since the seal is sandwiched between the segments and the segments are fastened and connected by bolts and nuts, there is a problem that the adhesion and workability of the seal are lacking.
(3) The open-cut underground structure of (Patent Document 2) has a problem in that it has to be coated with a band-like water-expanded water-stopping rubber along the outer periphery of each joint and lacks workability.
In addition, it takes 24 hours or more for the water-swelling water-stopping rubber to flood and swell, and the water-swelling water-stopping rubber is not reliable because it cannot be stopped immediately after flooding. Then, when the water expands, it is almost fixed in that state, and even if the earth pressure changes after the completion of construction and the open underground structure tries to deform, it cannot follow the deformation and lacks flexibility. Had.
Furthermore, the protection steel plate which coat | covers the outer peripheral surface of water expansion waterproofing rubber, fixation with water expansion waterproof rubber and concrete, and the flexibility of a protection steel plate were not examined.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, simply and reliably without impairing the flexibility of joints formed at the ends of various buried pipes and structures, and flexible parts formed in the middle. High air-tightness and water-tightness can be ensured, and reliability is excellent. Selective adhesion between water-stopping material and other materials such as metal is possible, design flexibility, versatility, and easy installation. It aims at providing the water stop structure excellent in mass-productivity, and its manufacturing method .

In order to solve the above problems, the water stop structure of the present invention has the following configuration.
The water-stop structure according to claim 1 of the present invention includes two pipe bodies disposed opposite to each other at the end face of the opening, a joint recess formed on the outer periphery of the joint of the two pipe bodies, and the joint recess. A flexible joint protector that is covered and fixed to the two pipes, and has fluidity before curing and is filled in the joint recess, and the inner surface of the joint recess and the inside of the joint protector And an external water-stop material having elasticity that is bonded to the peripheral surface, and the joint protector has a structure having a cut portion formed intermittently .
This configuration has the following effects.
(1) Since the joint concave portion is formed on the outer periphery of the joint portion of the two pipe bodies arranged opposite to each other at the end face of the opening, the two pipe bodies are reliably joined with the external water-stop material filled in the joint concave portion. The water can be stopped.
(2) Since the flexible joint protector covering the joint recess is fixed to the two pipes, the joint protector can follow the movement of the pipe due to external force. It is possible to protect the external waterstop material filled in the joint recess without impairing the flexibility of the joint.
(3) Since the external water-stopping material has fluidity before curing, it can be easily filled into the joint recess, and can be securely adhered to the inner surface of the joint recess and the inner peripheral surface of the joint protector. Can be secured.
(4) Since the external water blocking material after curing has elasticity, it can reliably follow the movement of the tubular body due to an external force, and is excellent in reliability without impairing the flexibility of the joint.
(5) Since the joint protector has a cut portion formed intermittently, the joint protector can be deformed by an external force such as pulling, bending, and twisting, so that the flexibility and water tightness of the joint are impaired. Therefore, it is possible to reliably protect the external water stop material and the joint.

Here, as a material of the pipe body, in addition to concrete, metals such as steel, stainless steel, chrome steel, and carbon steel, synthetic resins, and the like are preferably used. The cross-sectional shape of the tube may be any shape such as a circle, an ellipse, a rectangle, a polygon, or a combination thereof.
The joint recess may be formed in advance when the tube is formed, or may be formed by cutting the outer periphery of the end of the tube. Further, another member may be fixed to the end of the tube body by means such as embedding or joining.
As the joint protector, it is excellent in adhesiveness with an external water-stopping material, does not cause leakage of the external water-stopping material before curing, and has flexibility and can protect the external water-stopping material. Good. For example, nitrile rubber, ethylene propylene rubber, fluorine rubber, urethane rubber, etc. on woven fabrics made of metal fibers, carbon fibers, engineering resin fibers, or nets made of these, or nets made of metal filaments, etc. Those with a coating are preferably used.
Examples of the metal wire used for the metal fiber and the material of the metal fiber include steel, stainless steel, aluminum, brass, copper, monel metal, nickel, and nichrome. Further, as the engineering resin fiber, polyamide, polyacetal, polycarbonate, polysulfone, or the like can be used.
When filling the external water-stopping material after covering the outer periphery of the joint recess with the joint-protection body, it is necessary to provide a filling port for filling the joint-protection body with the external water-stopping material. is there.

As an external waterproofing material, liquid rubber such as silicone, urethane rubber, and diene that has fluidity before curing, adheres to surrounding members after curing, and has high elasticity and elasticity is preferably used. It is done. Thereby, filling is easy and excellent in productivity, and flexibility and water tightness of the joint portion can be ensured.
Prior to filling with the external water-stopping material, it is preferable to apply a primer treatment to the inner surface of the joint recess that contacts the external water-stopping material and the inner peripheral surface of the joint-protecting body. An optimal primer can be appropriately selected according to the material of the bonding recess and the bonding protector that are adherends. Adhesion with an external water-stopping material can be improved by the primer treatment, and by selectively performing the primer treatment, the presence or absence of adhesion can be easily and reliably controlled, and the workability is excellent.
In addition, adhesiveness can be further improved by performing a cleaning and a degreasing process before a primer process.
Here, metals such as steel, stainless steel, chrome steel, and carbon steel are preferably used as the material for the joint protector.
Laser processing is suitably used for forming the cut portion of the joint protector. The width, length, and pitch of the cut portion are determined in consideration of the size of the tube, the thickness of the joint protector, the allowable bending deformation amount, and the like. In addition, the shape of the cut portion can be formed in a straight line, a square shape, a square shape, or a combination thereof, and these can be arranged at an angle with a predetermined angle. In addition, by forming intermittent cuts in the circumferential direction at displacement points such as the center in the longitudinal direction of the joint protector, it can be deformed in response to external forces of tension and bending, and intermittent in the axial direction. By forming the slit portion at an arbitrary position, it can be deformed corresponding to the external force of torsion.
Further, a plurality of rows of cut portions intermittently formed in the circumferential direction of the joint protector are arranged at a predetermined pitch in the longitudinal direction of the central axis of the joint protector, and adjacent cut portions are predetermined in the circumferential direction. When arranged in a zigzag pattern with a gap from each other, the tensile side of the joint protector opens in a mesh shape when deformed by an external force, ensuring flexibility and protecting the external water-stopping material.
In addition, it is preferable to form the cut | interruption part of a junction part protection body in the position which does not overlap with the opening part end surface position of a tubular body. As a result, even if the cut portion of the joint protector opens during deformation due to external force, the water can be reliably stopped by the external water stop material adhered to the inner surface of the joint recess, and the reliability and durability of the water stop Can be improved.

According to a second aspect of the present invention, there is provided a water stop structure according to the first aspect, wherein both or one of the two pipes is formed on an outer periphery on the end face side of the opening. A notch portion; and (a) the notch surface of the notch portion and the end surface of the notch portion of the one tube body, and the other tube body of the two tube bodies. Or (b) a notch surface and a notch end surface of the notch of the two tubular bodies .
With this configuration, in addition to the operation of the first aspect, the following operation is provided.
(1) only one of the tubular body of the two tubular body, if having a notch portion formed on an outer periphery of the opening end face, it is brought into contact with the opening end faces of the two pipe, joining A joining recessed part can be formed in a part outer periphery, and it can be filled with an external water stop material and can stop water easily.
(2) joining recess, cut-and-out portion cut-out portion surface and the cutout end face of the case that are formed at the opening end surface of the other tube, the external stop filling the joint recess of one of the tubular body Two pipe bodies can be connected via the water material, and the joint can be reliably stopped.
(3) When two pipe bodies have a notch formed on the outer periphery of each opening end face side, it is only necessary to bring the opening end faces of the two pipe bodies into contact with each other. Can be formed, and water can be easily stopped by filling an external water stop material.
(4) When the joint recess is formed by the notch surface and the end surface of the notch of the two tube bodies, the two pipe bodies are connected via an external water stop material filled in the joint recess. It is possible to connect, and the joint can be reliably stopped.

  Here, one tube body is formed with a thin portion on the inner peripheral side by forming a cutout portion on the outer periphery on the end surface side of the opening. Since the axial force can be transmitted by bringing the distal end (opening end face) of the thin wall portion into contact with the opening end face of the other tubular body, it can be used for propulsion work as well as cutting work.

  Here, a thin part is formed in an inner peripheral side by forming a notch part in the outer periphery by the side of an opening part end surface of two pipe bodies. Since the axial force can be transmitted by abutting the tips (opening end surfaces) of the thin-walled portion, it can be used for propulsion as well as excavation.

The invention according to claim 3 of the present invention is the water stop structure according to claim 2, wherein the two pipe bodies are formed of concrete, and are formed on at least the notch surface of the one pipe body. A metal notch portion forming member disposed; and a metal opening end surface forming member disposed on the opening end surface of the other tubular body.
With this configuration, in addition to the operation of the second aspect, the following operation is provided.
(1) A metal notch forming member disposed on at least the notch surface of one tube and a metal opening end surface forming member disposed on the opening end surface of the other tube. Since it has, it can protect notch part surface and opening part end surface, and can improve the adhesiveness with the external water stop material in a joint recessed part, and is excellent in the certainty of water stop.

Here, metals such as steel, stainless steel, chrome steel, and carbon steel are preferably used as the material for the notch forming member and the opening end face forming member.
The notch portion forming member and the opening end surface forming member are set in the mold, respectively, and concrete is poured therein, and the anchor portion disposed on the notch forming member and the opening end surface forming member is embedded in the pipe body. It may be formed by, or may be fixed to a molded tube body by bolting.
By joining and temporarily fixing the end surfaces of the two tubular bodies each provided with the notch forming member and the opening end surface forming member, a joint recess is formed. Thereafter, the joint protection body is covered with the joint recess and fixed to the two pipe bodies. Finally, the joint recess is filled with an external waterstop material to complete the flexible joint.
At this time, an external water-stopping material can be filled between the joint recess and the joint protector simply and reliably by drilling a filling port in the joint protector. When one or more filling ports are provided in the longitudinal direction or circumferential direction of the joint protector, it is possible to check the filling state of the external water blocking material from the filling port, and to reliably fill while expelling air. In addition, it is possible to perform additional filling in places where filling is insufficient, and it is excellent in reliability and workability.

It is also possible to form the flexible joints first, and then cast concrete on both ends of the flexible joints by placing concrete later. In this case, the notch portion forming member and the opening portion end surface forming member are first butted and temporarily fixed. Then, a junction part protection body is fixed to the outer periphery of an opening part end surface formation member. Next, it is placed vertically so that the opening end face forming member faces down, and a cylindrical space surrounded by the notch forming member and the joint protector is filled with an external water stop material from the opening on the upper end side. Thereby, the flexible joint part integrated by the external water stop material is obtained. By setting this flexible joint in a mold and putting concrete, a tube is formed at both ends of the flexible joint.
In the case of having an end protection plate extending to the tip of the notch forming member and covering the tip of the thin part (opening end face), the tip of the thin part (opening end face) is directly connected to the other tubular body. Contact with the end face of the opening can be prevented, and the thin portion can be prevented from being damaged during deformation or the like.

The invention according to claim 4 of the present invention is the water stop structure according to claim 2 , wherein the two pipe bodies are formed of concrete, and at least the notch surface of the two pipe bodies and It has the structure provided with the metal joining recessed part formation member arrange | positioned by the said notch part end surface.
With this configuration, in addition to the operation of the second aspect , the following operation is provided.
(1) Since it has the metal joining recessed part formation member arrange | positioned at the notch part surface and notch part end surface of two pipe bodies, while being able to protect a notch part surface and a notch part end surface, a joining recessed part Adhesion with an external water-stopping material can be improved, and the sureness of water-stopping is excellent.

Here, as the material of the bonding recess forming member, the same material as the above-described notch forming member and opening end surface forming member is preferably used.
The joint recess forming member may be formed by setting in a mold, pouring concrete, and embedding the anchor portion disposed in the joint recess forming member in the pipe body, or forming a bolt on the molded pipe body. It may be fixed by tightening.
By joining and temporarily fixing the end surfaces of the two tubular bodies each provided with the joining recess forming member, the joining recess is formed. Thereafter, the flexible joint is completed in the same manner as described in the fourth aspect.

It is also possible to form the flexible joints first, and then cast concrete on both ends of the flexible joints by placing concrete later. In this case, first, the two bonding recess forming members are brought into contact with each other and temporarily fixed. Then, a junction part protection body is fixed to the outer periphery of a joining recessed part formation member. Next, in the same manner as described above, an external water blocking material is filled from the filling port formed in the joint protector or the joint recess forming member. By setting a joint recess forming member and a joint protector (flexible joint) integrated with an external water-stopping material in the mold and putting concrete into the tube at both ends of the flexible joint Is formed.
When having an end protection plate that extends to the tip of the joint recess forming member and covers the tip of the thin part (opening end face), it prevents the tip of the thin part (opening end face) from directly contacting each other. It is possible to prevent the thin-walled portion from being damaged during deformation.

Invention of Claim 5 of this invention is the water stop structure of any one of Claim 1 thru | or 4 , Comprising : The said cut part is within the range of the said notch part, The said opening part It has the structure formed in the circumferential direction and / or axial direction in the notch part end surface side in the position away from the end surface .
With this configuration, in addition to the operation of any one of claims 1 to 4 , the following operation is provided.
(1) Even if the cut portion of the joint protector opens when deformed by an external force, the water can be reliably stopped by an external water stop material adhered to the inner surface of the joint recess, and the reliability and durability of the water stop Can be improved.
(2) Even if the pipe body is deformed by pulling or bending and a gap is generated between the end faces of the opening, the gap and the gap do not overlap, and the external water-stopping material is the inner surface of the joint recess and the joint protector. Because it is adhered to the entire inner peripheral surface of the outer periphery, the inner periphery and outer periphery of the external water-stopping material can be protected by the notch surface and the joint protector, respectively, even at the time of deformation. Thus, even if a crack or the like occurs in a part of the external water-stopping material, the external water-stopping material 5 is not completely broken, and the water-stopping property can be maintained.

According to a sixth aspect of the present invention, there is provided a tubular body, a flexible portion having a plurality of cut portions intermittently formed in a zigzag manner in the circumferential direction of the tubular body, and an outer peripheral side of the tubular body. A flexible part protector having a cylindrical part that is spaced apart and covered by the flexible part, and an annular fixing part that is extended to one end of the cylindrical part and fixed to the outer peripheral surface of the tubular body; External water stop which has fluidity before curing, is filled between the tube body and the flexible part protector, and is stretched and bonded to the outer peripheral surface of the tube body and the inner surface of the flexible part protector And a material.
This configuration has the following effects.
(1) Since the flexible portion of the tubular body has a plurality of cut portions intermittently formed in a zigzag shape in the circumferential direction, the tubular body can be deformed by an external force such as tension, bending, and twisting. A cable or the like housed inside can be protected from external force.
(2) The flexible part protector is fixed to the outer peripheral surface of the tubular body extending to one end of the tubular part and the tubular part that are separated from the outer circumferential side of the tubular body and covered by the flexible part. Since it has an annular fixing portion, the flexible portion can be protected by the cylindrical portion, and in particular, the flexible portion can be prevented from being torn by an external force or the like before filling with the external water blocking material.
(3) Since the external water blocking material has fluidity before curing, it can be easily filled from the opening side of the flexible part protector, and the outer peripheral surface of the tubular body and the inner surface of the flexible part protector can be reliably It can be bonded to ensure water-stop.
(4) Since the external water-stopping material after curing has elasticity, it can reliably follow the movement of the tubular body due to external force, and is excellent in reliability without impairing the flexibility of the flexible portion. .

  Here, metals such as steel, stainless steel, chrome steel, and carbon steel, synthetic resins, and the like are suitably used as the material for the tubular body and the flexible part protector. The cross-sectional shape of the tube may be any shape such as a circle, an ellipse, a rectangle, a polygon, or a combination thereof. In addition, the flexible part protector may be formed to be slightly larger in accordance with the cross-sectional shape of the tube. For fixing the tubular body and the annular fixing portion of the flexible portion protection body, a method such as adhesion, welding, or welding can be selected according to the material. Since one end side of the flexible part protector is fixed and closed to the tube body by the annular fixing part, it can be easily opened from the opening of the flexible part protection body in a state where the tubular body is erected so that the annular fixing part is at the bottom. It can be filled with an external water-stopping material and has excellent workability. The external water blocking material is the same as described above.

The cut portion of the flexible portion can be formed in the same manner as the cut portion of the joint protector described above. By forming the flexible portion at a displacement location such as the center in the longitudinal direction of the tubular body, the flexible portion can be deformed in response to an external force of tension or bending. In particular, since the cut portions are arranged in a staggered manner, the cut portions can be opened in a mesh shape by an external force of tension, and the flexible portion can be deformed.
Since the cut portion of the flexible portion is covered with the flexible portion protector integrated with the tube, even if the cut portion of the flexible portion opens when deformed by an external force, the flexible portion protector Water can be reliably stopped by an external water-stopping material bonded to the inner surface of the water, and the reliability and durability of water-stopping can be ensured. In particular, by forming the cut part of the flexible part as far as possible from the opening part of the flexible part protector (on the side of the annular fixing part), local defects or partial defects caused by bubbles or the like may occur in the external water stop material. Even if a crack or the like occurs, the airtightness and watertightness can be maintained without breaking.

The invention according to claim 7 of the present invention is the water stop structure according to any one of claims 1 to 6 , wherein the external water stop material is a liquid rubber.
With this configuration, in addition to the operation of any one of claims 1 to 6 , the following operation is provided.
(1) Since the external water-stopping material is a liquid rubber, it is excellent in filling properties, and water-tightness can be ensured by water-stopping the outside of the joint and the flexible part, and it can be pulled by the elasticity and stretchability of the external water-stopping material. It is possible to cope with deformation such as compression and bending, and to maintain the flexibility of the joint portion and the flexible portion.
(2) Since the external water-stopping material is a liquid rubber, it can be simply filled using an injector or the like.

Here, as the liquid rubber, a condensation reaction type such as a dealcohol type RTV (room temperature curing type) which reacts with moisture in the air at room temperature and cures into a rubber shape is suitably used. Silicone RTV rubber (for example, Shin-Etsu silicone civil engineering sealant 70 series) that adheres to the surrounding material at the same time as curing is excellent in reliability of water stoppage and is preferable. By selecting and applying an optimal primer as appropriate according to the surrounding material, it can be reliably bonded to the external water-stopping material. Note that the primer treatment may not be performed depending on the type of the external water-stopping material or the surrounding material. As the silicone RTV rubber, one-pack type or two-pack type can be used.
Since the external water-stopping material has sufficient elasticity, even if it adheres to the entire surface in contact with the external water-stopping material, the flexibility of the joint and the flexible part does not decrease, and the movement of the tube due to external force In addition, the external water stop material can be expanded and contracted following the deformation of the joint protector, and the water stop reliability is excellent.
Invention of Claim 8 is a manufacturing method of the water stop structure of any one of Claim 1 thru | or 5, Comprising: The said opening part end surface of the said 2 pipe body is temporarily fixed, and the said joint recessed part is made. A temporary bonding step to be formed; a bonding portion protection step in which the bonding portion protector is disposed and fixed on the outer periphery of the bonding recess; and the outer water blocking material on the inner surface of the bonding recess and the inner peripheral surface of the bonding portion protection body. And an external water-stopping material filling step for filling.
This configuration has the following effects.
(1) Since it temporarily fixes, while being able to handle two pipes integrally, the leakage of the external waterstop material filled in an external waterstop material filling process can be prevented, and it is excellent in workability.
Invention of Claim 9 is a manufacturing method of the water stop structure of Claim 3, Comprising: The temporary joining which temporarily fixes the said notch part formation member and the said opening part end surface formation member, and forms the said joint recessed part A step of protecting a joint portion disposed on and fixed to the outer periphery of the joint recess, and an outer surface filling the inner surface of the joint recess and the inner peripheral surface of the joint protector And a molding step for molding the tubular body by setting the joint protection body integrated through the external water-stopping material and the joint recess in a mold. is doing.
This configuration has the following effects.
(1) By disposing the wedge-shaped interval adjusting piece, the height of the joint recess formed between the inner peripheral surface of the joint protector and the outer periphery of the notch forming member is substantially the same over the entire circumference. It can be kept constant, the filling property of the external water-stopping material in the subsequent step of filling the external water-stopping material can be improved, and the finished thickness of the external water-stopping material can be made uniform.
(2) By performing the filling operation with the opening end face forming member being placed vertically, the external water-stopping material can be reliably filled without any spots.
Invention of Claim 10 is a manufacturing method of the water stop structure of Claim 4, Comprising: The temporary joining process which temporarily fixes the said joining recessed part formation member and forms the said joining recessed part, The outer periphery of the said joining recessed part A joint protection step for disposing and fixing the joint protector, an external waterstop filling step for filling the external waterstop on the inner surface of the joint recess and the inner peripheral surface of the joint protector, And a molding step of molding the pipe body by setting the joint protection body integrated through an external water blocking material and the joint recess in a mold.
This structure has the same effect as that of the ninth aspect.
The invention described in claim 11 there is provided a method for producing a water stopping structure according to claim 6, allowed to the flexible portion intermittently formed the cut portion in a staggered manner in the circumferential direction of the tubular body A bending portion forming step, the tubular portion that is spaced apart on the outer peripheral side of the tubular body and is covered by the flexible portion, and extends to one end of the tubular portion, and is fixed to the outer circumferential surface of the tubular body. A flexible portion protection step for fixing the flexible portion protector including the annular fixing portion, and an external water blocking material filling step for standing the tube so that the annular fixing portion is at the bottom and filling an external water blocking material. It has the composition provided with.
This configuration has the following effects.
(1) Since one end side of the flexible part protector is fixed and closed to the tubular body by the annular fixing part, the opening part of the flexible part protective body is in a state where the tubular body is erected so that the annular fixing part is at the bottom. Therefore, it can be easily filled with an external water-stop material and has excellent workability.

As described above, according to the water stop structure of the present invention, the following advantageous effects can be obtained.
According to invention of Claim 1, it has the following effects.
(1) A simple structure that can reliably stop water by joining two tubular bodies that are arranged opposite to each other at the end face of the opening and are formed with a joint recess on the outer periphery of the joint by using an external water-stop material filled in the joint recess. It is possible to provide a water-stopping structure that is highly reliable with a simple configuration.
(2) Since the joint protector fixed to the two tubular bodies and covered by the joint recess has flexibility, it can follow the movement of the tubular body due to external force, and the flexibility of the joint In addition, it is possible to provide a water-stopping structure excellent in flexibility and water-stop reliability that can reliably protect the external water-stop material filled in the joint recess.
(3) By using an external water-stopping material having fluidity before curing, it is easy to fill the joint recess and has excellent workability, and an external water stop is provided on the inner surface of the joint recess and the inner peripheral surface of the joint protector. It is possible to provide a highly reliable water-stopping structure capable of ensuring the water-stopping property by securely bonding the materials.
(4) By using an external water-stopping material having elasticity after curing, it is possible to reliably follow the movement of the tubular body due to an external force, and it is excellent in flexibility and hardly breaks the external water-stopping material. It is possible to provide a water stop structure with excellent water stop reliability.
(5) Because the joint protector has intermittently formed cut portions, the joint protector can be deformed by external forces such as tension, bending, and twisting, and the joint has excellent flexibility and water tightness. It is possible to provide a highly reliable water stop structure that can reliably protect the water material and the joint.

According to invention of Claim 2, in addition to the effect of Claim 1, it has the following effects.
(1) By simply bringing the two end faces of the tubular bodies into contact with each other, a joint recess can be easily formed on the outer periphery of the joint by the notch, and it is easily and reliably filled with an external water-stop material. It is possible to provide a water stop structure excellent in the reliability and workability of water stop that can stop the joint.
(2) Secure the external water-stopping material filled in the joint recess on the notch surface and notch end surface of the notch of one tube forming the joint recess and the opening end surface of the other tube It is possible to provide a water-stopping structure excellent in flexibility and water-stopping properties, which can be bonded to each other and can connect two pipe bodies with an external water-stopping material having elasticity and elasticity.
(3) By simply bringing the two end faces of the tubular bodies into contact with each other, a joint recess can be formed on the outer periphery of the joint by the notch, and the joint can be easily and reliably filled with an external water-stopping material. It is possible to provide a water stop structure excellent in the reliability and workability of water stop.
(4) The external water-stopping material filled in the joint recess can be reliably bonded to the notch surface and the end surface of the notch of the two tubular bodies forming the joint recess, and the stretchability and It is possible to provide a water-stopping structure excellent in flexibility and water-stopping property that can connect two pipe bodies with an external water-stopping material having elasticity.

According to invention of Claim 3, in addition to the effect of Claim 2 , it has the following effects.
(1) By a metal notch forming member disposed on at least the surface of the notch of one tubular body and a metal opening end surface forming member disposed on the opening end face of the other tubular body It is possible to provide a water stop structure that can protect the surface of the notch and the opening end face, and can improve the adhesion with the external water stop material in the joint recess, and has excellent water stop reliability and durability. it can.

According to invention of Claim 4, in addition to the effect of Claim 2, it has the following effects.
(1) The notch part surface and the notch part end face can be protected by a metal joining recess forming member disposed on at least the notch part surface and the notch end surface of the two pipe bodies, and the outside in the joining recess part. It is possible to provide a water stop structure that can improve the adhesion to the water stop material and is excellent in water stop reliability and durability .

According to invention of Claim 5, in addition to the effect of any one of Claims 1 thru | or 4, it has the following effects.
(1) It is possible to provide a water stop structure that can reliably stop water with an external water stop material and can improve the reliability and durability of water stop.
(2) Even during deformation, the inner periphery and outer periphery of the external water-stopping material can protect the notch surface and the joint protector, respectively, and cracks in part of the external water-stopping material near the cuts and gaps Even if such a problem occurs, it is possible to provide a water-stopping structure that can maintain water-stopping without the external water-stopping material being completely torn.

According to invention of Claim 6, it has the following effects.
(1) Since the tubular body itself has a flexible portion composed of a plurality of cut portions intermittently formed in the circumferential direction, it can be deformed following external forces such as tension, bending, and twisting, and has a simple structure. It is possible to provide a water stop structure excellent in reliability and mass productivity that can protect a cable or the like housed in the tube body from an external force.
(2) The flexible part protector can be integrated with the tubular body by the annular fixing part, and the flexible part can be protected by the cylindrical part covered by the flexible part. It is possible to provide a water stop structure excellent in reliability and workability capable of preventing the flexible portion from being torn by external force or the like before filling.
(3) By using an external water-stopping material having fluidity before curing, it is easy to fill and has excellent workability, and an external water-stopping material is securely attached to the outer peripheral surface of the tubular body and the inner surface of the flexible protective body. It is possible to provide a highly reliable water stop structure that can be bonded to ensure water stop.
(4) By using an external water-stopping material having elasticity after curing, it is possible to reliably follow the movement of the tubular body due to an external force, and it is excellent in flexibility and hardly breaks the external water-stopping material. It is possible to provide a water stop structure with excellent water stop reliability.

According to invention of Claim 7, in addition to the effect of any one of Claims 1 thru | or 6, it has the following effects.
(1) Since the external water-stopping material is a liquid rubber, it is excellent in filling properties, and water-tightness can be ensured by water-stopping the outside of the joint and the flexible part, and it is pulled by the elasticity and stretchability of the external water-stopping material. Therefore, it is possible to provide a water-stopping structure that can cope with deformation such as compression and bending and can maintain the flexibility of the joint portion and the flexible portion and is excellent in reliability, practicality, and durability. .
(2) Since the external water-stopping material is a liquid rubber, it is possible to provide a water-stopping structure excellent in workability and mass productivity that can be easily filled using an injector or the like.

According to invention of Claim 8, it has the following effects.
(1) Since it is fixed with a temporary fixing member, it is possible to handle the two pipes integrally and to prevent leakage of the external water-stopping material that is filled in the external water-stopping material filling step, so that the pipe body has excellent workability. The manufacturing method of can be provided.
According to invention of Claim 9, it has the following effects.
(1) The height of the joint recess can be kept substantially constant over the entire circumference, improving the filling performance of the external water-stopping material in the subsequent external water-stopping material filling step, and the finished thickness of the external water-stopping material It is possible to provide a method of manufacturing a tubular body that can make the thickness uniform.
(2) It is possible to provide a method for manufacturing a tubular body that can be reliably filled with an external water-stopping material without spots.
According to invention of Claim 10, it has the following effects.
(1) It is possible to provide a method for manufacturing a tubular body that can be easily filled with an external water-stopping material and has excellent workability.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a cutaway side view showing a main part of a pipe body having a water stop structure according to Embodiment 1, and FIG. 2 (a) is a side view when the pipe body having a water stop structure according to Embodiment 1 is deformed. 2 (b) is an enlarged view of a portion A in FIG. 2 (a), and FIG. 3 is a cross-sectional view of the main part at the time of deformation of the tubular body having the water stop structure in the first embodiment.
In FIG. 1, reference numerals 1 and 2 denote concrete, a metal such as steel, stainless steel, chrome steel, and carbon steel, and a synthetic resin that is formed of a water stop structure for the flexible joint in the first embodiment. 1a and 2a are end faces of the openings of the tubes 1 and 2; 1b and 2b are outer peripheral surfaces of the tubes 1 and 2; 1c and 2c are tubes 1 and 2; Cutout portions 1d and 2d formed on outer peripheries of the opening end faces 1a and 2a are cutout surfaces of the cutout portions 1c and 2c, 1e and 2e are cutout end faces of the cutout portions 1c and 2c, and 1f. , 2f are thin portions of the tubular bodies 1 and 2 that are in contact with the opening end faces 1a and 2a, and 1g and 2g are steps of the outer surface 1b and 2b of the tubular bodies 1 and 2 or the joint protector 4 The fitting part 3 formed lower by the thickness 3 is the notch part surface 1d, 2d of the notch part 1c, 2c and the notch. The joint recess 4 formed on the outer periphery of the joint of the tubes 1 and 2 by the notch end faces 1e and 2e, 4 covers the joint recess 3 and is fitted to the fitted portions 1g and 2g of the two tubes 1 and 2. The joint protector 4a is made of metal pipes such as fixed steel, stainless steel, chrome steel, carbon steel, and the like. 4a is a cut portion that is intermittently formed and arranged in a zigzag manner in the circumferential direction of the joint protector 4. Is a connection portion formed between the cut portion 4a and the cut portion 4a of the joint protector 4, and 4c is a plurality of holes formed in the circumferential direction at a position overlapping one end side of the joint protector 4 with the joint recess 3. The filling port 5 is filled into the joint recess 3 from the fill port 4c and bonded to the notch surface 1d, 2d and the notch end surfaces 1e, 2e and the inner peripheral surface of the joint protector 4 which are the inner surfaces of the joint recess 3. It is an external water-stopping material such as a stretched silicone rubber.

The notches 1c and 2c that form the joint recess 3 may be formed in advance when the tubes 1 and 2 are formed, or are formed by cutting the outer periphery of the tube end portions 1a and 2a side. May be.
The joint protector 4 can be divided in half and fixed so that the tubes 1 and 2 are sandwiched from both sides. The outer peripheral surfaces 1b and 2b of the tubes 1 and 2 and the outer peripheral surface of the joint protector 4 can be made substantially flush by fitting and fixing to the stepped fitting parts 1g and 2g. 4 is not displaced and can be securely fixed.
The joint protector 4 was formed with a plate thickness of 2 mm to 12 mm. As the plate thickness becomes thinner than 2 mm, the rigidity and wear resistance tend to decrease and the external water-stopping material 5 tends to break down. As the plate thickness becomes thicker than 12 mm, the weight increases and the workability and processing are increased. This is because it has been found that there is a tendency that the flexibility of the joint portion tends to be lowered while lacking in properties.

Laser machining was used to form the cut portion 4a of the joint protector 4. The width, length, and pitch of the cut portion 4a were determined in consideration of the sizes of the tubular bodies 1 and 2, the plate thickness of the joint protector 4, the allowable bending deformation amount, and the like. In addition to the straight line shape, the cut portion 4a can be formed into a square shape, a square shape, or a combination of these shapes, and these can be arranged inclined at a predetermined angle.
Also, a plurality of rows of cut portions 4a formed intermittently in the circumferential direction of the joint protector 4 are arranged in the longitudinal direction of the central axis of the joint protector 4, and the adjacent cut portions 4a are shifted in the circumferential direction. Arranged in a shape. As a result, as shown in FIG. 2, when the joint protector 4 is deformed by an external force, the cut portion 4a on the pulling side can be opened in a mesh shape to ensure flexibility, and the external water blocking material 5 can be protected. .

In FIG. 3, 5a is a gap generated between the opening end faces 1a and 2a when the tubes 1 and 2 are deformed.
The cut portion 4a of the joint protector 4 was formed at a position (notch end surface 1e side) away from the tip (opening end surface 1a side) within the range of the thin portion 1f of the tube 1. Thereby, even if the pipes 1 and 2 are deformed by pulling or bending and the gap 5a is generated between the opening end faces 1a and 2a, the cut 4a and the gap 5a do not overlap. Since the outer water-stopping material 5 is bonded to the entire inner surface of the joint recess 3 and the inner peripheral surface of the joint-protecting body 4, the inner periphery and the outer periphery of the outer water-stopping material 5 are notched surfaces even when deformed. 1d, 2d and the joint protector 4 can protect the external waterproof material 5 even if the external waterproof material 5 is cracked in the vicinity of the cut portion 4a or the gap 5a. The water-stopping property can be maintained.

  The joint protector 4 is not limited to the present embodiment, and is excellent in adhesiveness with the external water-stopping material 5 and is flexible without causing leakage of the external water-stopping material 5 before curing. It is sufficient if it has a property and can protect the external water blocking material 5. For example, nitrile rubber, ethylene propylene rubber, fluoro rubber, urethane rubber on woven fabrics made of metal fibers, carbon fibers, engineering resin fibers, or nets made of these, or nets made of metal filaments, etc. Etc. can be suitably used. Examples of the metal wire used for the metal fiber and the material of the metal fiber include steel, stainless steel, aluminum, brass, copper, monel metal, nickel, and nichrome. Further, as the engineering resin fiber, polyamide, polyacetal, polycarbonate, polysulfone, or the like can be used.

  As the external water blocking material 5, liquid rubber such as silicone, urethane rubber, and diene that has fluidity before curing, adheres to surrounding members after curing, and has high elasticity and high elasticity is preferable. Used. Thereby, filling is easy and excellent in productivity, and flexibility and water tightness of the joint portion can be ensured. In particular, a condensation reaction type such as a dealcohol type RTV that reacts with moisture in the air at room temperature and cures in a rubbery form is excellent in workability. Silicone civil engineering sealants 701 and the like are preferable because of their excellent reliability of water stoppage. By selecting and applying an optimal primer as appropriate according to the surrounding material, it is possible to reliably adhere to the external water blocking material 5. The primer treatment may not be performed depending on the type of the external water stop material 5 and the surrounding material.

  The external water blocking material 5 was filled from a filling port 4 c formed in the joint protector 4. By providing a plurality of filling ports 4c, the state of filling of the external water blocking material 5 can be confirmed, the air can be surely filled while expelling air, and additional filling can be performed at places where filling is insufficient. Excellent in workability and workability. In addition, when providing the some filling port 4c, when filling the external water stop material 5 from one filling port 4c, in order to prevent the leakage from the other filling port 4c, the location where filling was completed (lower side) The filling port 4c is preferably closed sequentially. Moreover, although the several filling port 4c was provided in the circumferential direction in this Embodiment, you may provide in a longitudinal direction. In this case, filling may be performed in a state where the tubes 1 and 2 are erected, and the tube may be closed from the filling port 4c on the lower end side where filling is completed.

A method for manufacturing a water stop structure in Embodiment 1 configured as described above will be described below with reference to the drawings.
FIG. 4A is a schematic cross-sectional view of the main part showing the primer treatment process of the water stop structure in the first embodiment, and FIG. 4B is the main part showing the temporary joining process of the water stop structure in the first embodiment. FIG. 4C is a schematic cross-sectional view of the relevant part showing the joint protection process and the external waterproof material filling process of the water stop structure in the first embodiment. For convenience of explanation, FIG. 4 shows only the upper part of a vertically symmetrical cross section.

First, the primer treatment process will be described.
In FIG. 4A, reference numeral 6 denotes a primer treatment layer formed on the notch surface 1d, 2d and the notch end surfaces 1e, 2e of the tubes 1 and 2.
The primer treatment layer 6 is formed in order to improve adhesiveness with each part in contact with the external water-stopping material 5 filled in the external water-stopping material filling step described later. The primer treatment layer 6 can be formed by applying a primer treatment agent according to the material of the tubes 1 and 2 by brushing or the like.
In addition, adhesiveness can be improved further by performing a cleaning process and a degreasing process before a primer process.

Next, the temporary joining process will be described.
In FIG. 4B, reference numeral 7 denotes a temporary fixing member such as an adhesive tape or an adhesive sheet for temporarily fixing the tubes 1 and 2 on the inner peripheral side of the opening end faces 1a and 2a.
Thereby, while being able to handle the pipe bodies 1 and 2 integrally, the leakage of the external water-stop material 5 with which it fills in the external water-stop material filling process mentioned later can be prevented, and it is excellent in workability.

Next, the junction protecting process will be described.
In FIG. 4C, reference numeral 8 denotes a primer treatment layer formed on the inner peripheral surface of the joint protector 4.
The joint protector 4 on which the primer treatment layer 8 is formed is fitted and fixed to the fitted portions 1g and 2g of the pipes 1 and 2.
The fixing method of the pipes 1 and 2 and the joint protector 4 can be appropriately selected according to the respective materials, and means such as adhesion, welding, and welding are preferably used.

Next, the external waterstop filling process will be described.
In FIG. 4 (c), the external waterstop 5 is filled into the joint recess 3 from the filling port 4 c of the joint protector 4. By removing the temporary fixing member 7 after the external water-stopping material 5 is cured, the water-stopping structure shown in FIG.

Next, a modification of the tubular body having the water stop structure in the first embodiment will be described.
FIG. 5 is a cutaway side view of a main part showing a modification of the tubular body having the water stop structure in the first embodiment. In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1, and description is abbreviate | omitted.
In FIG. 5, reference numerals 10 and 20 denote metal joint recess forming members each having a substantially L-shaped cross section covering the notch surface 1d and 2d and the notch end surfaces 1e and 2e of the two pipes 1 and 2, respectively. Reference numeral 21 denotes an anchor portion which is erected at a main point on the back surface of the joint recess forming members 10 and 20 and embedded in the pipes 1 and 2.

The joint recess forming members 10 and 20 can be suitably used when the pipe bodies 1 and 2 are made of concrete. By setting the joint recess forming members 10 and 20 in the molds and putting concrete, the anchor portions 11 and 21 disposed in the joint recess forming members 10 and 20 are formed into the molded tubes 1 and 2. Can be embedded and integrated.
By joining and temporarily fixing the end faces of the two tubular bodies 1 and 2 on which the joint recess forming members 10 and 20 are respectively disposed, the joint recess 3 is formed. Except that the joint recess forming members 10 and 20 are disposed inside the joint recess 3, it is the same as that of the first embodiment, and can be manufactured by the same procedure as described above.

As described above, according to the water stop structure of the flexible joint portion in the first embodiment, the following operation is provided.
(1) Since the joint concave portion 3 is formed on the outer periphery of the joint portion of the two tubular bodies 1 and 2 that are arranged opposite to each other at the opening end faces 1a and 2a, the external water blocking material 5 filled in the joint concave portion 3 The two pipe bodies 1 and 2 can be joined and water can be reliably stopped.
(2) Since the flexible joint protector 4 covered by the joint recess 3 is fixed to the two pipes 1 and 2, it joins against the movement of the pipes 1 and 2 due to external force. The part protector 4 can follow, the flexibility of the joint part is not impaired, and the external water blocking material 5 filled in the joint recessed part 3 can be protected.
(3) Since the external water blocking material 5 has fluidity before curing, the joint recess 3 can be easily filled, and the inner surface of the joint recess 3 and the inner peripheral surface of the joint protector 4 are surely covered. It is possible to ensure water-stopping properties by adhering.
(4) Since the external water-stop material 5 after curing has elasticity, it can reliably follow the movement of the tubes 1 and 2 due to external force, and is reliable without impairing the flexibility of the joint. Excellent in properties.
(5) Since the two tubular bodies 1 and 2 have the notches 1c and 2c formed on the outer peripheries of the respective opening end faces 1a and 2a, the opening end faces 1a and 2a of the two tubular bodies 1 and 2 are provided. By simply bringing 2a into contact with each other, the joint concave portion 3 can be formed on the outer periphery of the joint portion, and the water can be easily stopped by filling the external water-stop material 5.
(6) Since the joint recess 3 is formed by the notch surfaces 1d and 2d of the notches 1c and 2c and the notch end faces 1e and 2e of the two tubular bodies 1 and 2, the joint recess 3 is filled. The two pipe bodies 1 and 2 can be connected through the external water-stopping material 5 thus made, and the joint can be reliably water-stopped.
(7) Since the joint protector 4 has the cut portions 4a formed intermittently in the circumferential direction, the joint protector 4 can be deformed by an external force such as pulling, bending, and twisting. The external water-stopping material 5 and the joint can be reliably protected without impairing the watertightness.
(8) Since the external water-stopping material 5 is a liquid rubber, the filling property is excellent, and the water-tightness can be secured by water-stopping the outside of the flexible joint, and the elasticity and stretchability of the external water-stopping material 5 can be secured. It is possible to cope with deformation such as tension, compression, bending, and the flexibility of the joint portion can be maintained.
(9) Since the external water-stopping material 5 is a liquid rubber, it can be easily filled using an injector or the like.
(10) When the two pipe bodies 1 and 2 are made of concrete and have the notch portion surfaces 1d and 2d and the metal joint recess forming members 10 and 20 disposed on the notch end surfaces 1e and 2e, the notches The part surfaces 1d and 2d and the notch part end faces 1e and 2e can be protected, and the adhesion of the joint recess 3 with the external water-stop material 5 can be improved, and the sureness of water stoppage is excellent.

(Embodiment 2)
FIG. 6A is a cross-sectional view of a main part showing a pipe body having a water stop structure in the second embodiment, and FIG. 6B is a view showing a deformation of the pipe body having the water stop structure in the second embodiment. FIG.
In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1, and description is abbreviate | omitted.
In FIG. 6, 3 a is a joint recess formed by the notch 2 c of one tube body 2, and 4 d is a concrete tube 1 disposed along the inner periphery of both ends of the joint protector 4. The anchor bars 4e embedded in and fixed at 2 are fixed at important points on the inner periphery of the joint protector 4, and are made of a metal opening end face forming member 10a disposed on the opening end face 1a of the other tubular body 1. And a substantially L-shaped fastener fixed by welding, screwing, or the like, 11 is an anchor portion standing on the back surface of the opening end surface forming member 10a and embedded in the tubular body 1, and 20a is the tubular body 2. A metal notch forming member 21 a disposed on the surface 2 d of the notch part, 21 a is an anchor muscle which is disposed along the inner periphery of both ends of the notch forming member 20 and is embedded and fixed in the tube 2. It is.

In FIG. 6, the water stop structure in the second embodiment is different from that in the first embodiment in that the notched portion 1 c is not formed in the tube body 1 and the opening end surface forming member 10 a is disposed on the opening end surface 1 a. The notch portion forming member 20a is disposed on the notch portion surface 2d of the notch portion 2c formed in the tube body 2, and the joint protector 4 is connected to the tube body 1 by the anchor muscle 4d. , 2 and being fixed to the opening end face forming member 10a by a stopper 4e.
In FIG. 6, only the upper part of the vertically symmetrical cross section is shown, but the opening end face forming member 10a is formed in an annular shape so as to cover the opening end face 1a of the tubular body 1, and the notch forming member 20a. Is formed in a cylindrical shape so as to cover the notch surface 2d of the tube body 2.
As shown in FIG. 6 (b), the cut portion 4a of the joint protector 4 is located away from the tip (opening end face 3a side) within the range of the notch forming member 20a of the tube body 2 (cut end portion 3a side). (Notch end surface 2e side). Thereby, even if the pipes 1 and 2 are deformed by pulling or bending and the gap 5a is generated between the opening end faces 1a and 2a, the cut 4a and the gap 5a do not overlap with each other. Even if a crack or the like occurs in a part of the external water-stopping material 5 in the vicinity of the gap 5a, the external water-stopping material 5 is not completely torn and a good deformation state similar to that of the first embodiment can be obtained. Yes, and excellent water stop reliability.

A method for manufacturing a water stop structure in Embodiment 2 configured as described above will be described below with reference to the drawings.
FIG. 7A is a schematic cross-sectional view of the main part showing the primer treatment process of the water stop structure in the second embodiment, and FIG. 7B is the main part showing the temporary joining process of the water stop structure in the second embodiment. FIG. 7C is a schematic cross-sectional view, FIG. 7C is a schematic cross-sectional view of the principal part showing the joint protection process of the water stop structure in the second embodiment, and FIG. 7D is a water stop structure in the second embodiment. It is a principal part cross-sectional schematic diagram which shows an external waterstop material filling process.

First, the primer treatment process will be described.
In FIG. 7A, the primer treatment layer 6 is formed on the surface of the opening end face forming member 10 a and the notch forming member 20 a at a portion in contact with the external water blocking material 5.
In addition, since the formation method of a primer processing agent is the same as that of Embodiment 1, description is abbreviate | omitted.

Next, the temporary joining process will be described.
In FIG. 7B, 7a temporarily fixes the end portions of the opening end face forming member 10a and the notch forming member 20a on the inner peripheral side of the notch forming member 20a, and in an external water sealant filling step described later. This is a temporary fixing member for preventing leakage of the external water blocking material 5 to be filled.
The material and the fixing method of the temporary fixing member are the same as those in the first embodiment, and thus the description thereof is omitted.

Next, the junction protecting process will be described.
In FIG. 7C, reference numeral 22 denotes an opening of a substantially cylindrical joint recess 3a formed between the inner peripheral surface of the joint protector 4 and the outer periphery of the notch forming member 20a.
In FIG.7 (c), the joint part protection body 4 by which the metal fitting 4e was previously fixed to the inner peripheral important point by welding etc. was arrange | positioned on the outer periphery of the opening part end surface formation member 10a and the notch part formation member 20a, The fastener 4e is fixed to the back surface of the opening end face forming member 10a by welding, screwing or the like. In addition, a primer treatment layer 8 was formed on the inner periphery of the joint protector 4 on the part that adheres to the external water blocking material 5 in the same manner as in the first embodiment.
The opening 22 is preferably provided with a wedge-shaped interval adjusting piece (not shown) at a point on the circumference. By disposing the interval adjusting piece, the height of the joint recess 3a formed between the inner peripheral surface of the joint protector 4 and the outer periphery of the notch forming member 20a is substantially constant over the entire circumference. Can keep. As a result, it is possible to improve the filling property of the external water-stopping material 5 in the external water-stopping material filling step in the subsequent process and make the finished thickness of the external water-stopping material 5 uniform.

Next, the external waterstop filling process will be described.
In FIG.7 (d), the external water blocking material 5 is filled from the opening part 22 between the internal peripheral surface of the junction part protection body 4, and the outer periphery of the notch part formation member 20a.
At this time, the external water-stopping material 5 can be reliably filled without any spots by vertically placing the opening end face forming member 10a downward and performing the filling operation. After the external water blocking material 5 is cured, the temporary fixing member 7a is removed.

Next, the concrete placing process will be described.
The joint protector 4, the opening end surface forming member 10 a and the notch forming member 20 a (see FIG. 7D) integrated through the external water blocking material 5 are set in a mold for centrifugal molding. Centrifuge while putting concrete.
The anchor bars 4d of the joint protector 4, the anchor part 11 of the opening end surface forming member 10a, and the anchor bars 21a of the notch forming member 20a are embedded in the tubular bodies 1 and 2 by centrifugal molding, as shown in FIG. A tubular body having the water-stop structure shown can be obtained. In addition, in order to prevent the concrete of the opening end surface 2a which is the front-end | tip of the thin part 2f of the tubular body 2 sticking to the opening end surface forming member 10a of the tubular body 1, a peeling material is applied to the surface of the opening end surface forming member 10a. Apply.

As described above, according to the water stop structure in the second embodiment, in addition to the functions obtained in the first embodiment, the following functions are provided.
(1) Since one of the two tubular bodies 1, 2 has a notch 2c formed on the outer periphery on the opening end surface 2a side, the opening end surface 2a of the one tubular body 2 is By simply contacting the opening end face forming member 10a disposed on the opening end face 1a of the other tube body 1, the joining recess 3a can be formed on the outer periphery of the joining section, and the external water blocking material 5 is filled. Can be easily stopped.
(2) An opening end surface in which the joining recess 3a is disposed on the notch surface 2d and the notch end surface 2e of the notch 2c of one tube body 2 and the opening end surface 1a of the other tube body 1. Since it forms with the formation member 10a, the two pipe bodies 1 and 2 can be connected via the external water-stop material 5 with which the joining recessed part 3a was filled, and a junction part can be reliably water-stopped. .
(3) A metallic notch forming member 20a disposed on the notch surface 2d of one tubular body 2, and a metallic opening disposed on the opening end face 1a of the other tubular body 1. Since the end surface forming member 10a is provided, the notch surface 2d and the opening end surface 1a can be protected, and the adhesion with the external water-stopping material 5 in the joint recess 3a can be improved, and the sureness of water stoppage is excellent. .

(Embodiment 3)
FIG. 8A is a cross-sectional view of a main part showing a pipe body having a water stop structure in the third embodiment, and FIG. 8B is a view showing a deformation of the pipe body having the water stop structure in the third embodiment. FIG.
In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1 and 2, and description is abbreviate | omitted.
In FIG. 8, the tube body having the water stop structure in the third embodiment is different from the second embodiment in that the tube body 2 is fixed in the tube body 2 on the side of the notch end surface 2e of the notch portion forming member 20a. A point provided with a buried portion 21c , a point provided with an annular end protection plate 20c in which a notch portion forming member 20a is covered with the opening end surface 2a and is in contact with the opening end surface forming member 10a, and an anchor It is a point provided with the anchor part 21b erected in the important point of the back surface of the edge part protection board 20c instead of the line | wire 21a and embed | buried in the pipe body 2. FIG.

The fixing embedded portion 21c is preferably provided intermittently in the circumferential direction of the notch forming member 20a. Thereby, the embedding part 21c for fixation and the concrete of the pipe body 2 are fixed so as to alternately engage with each other, and the fixing stability is excellent. In particular, when the fixing embedded portion 21c is formed in a substantially inverted trapezoidal shape, the anchor effect is excellent, and the notch portion forming member 20a is not easily pulled out in the horizontal direction, and the reliability is excellent.
The end protection plate 20b was formed in an annular shape so as to contact the opening end surface 2a of the thin portion 2f on the inner peripheral side of the notch forming member 20a. In addition, the height of the edge part protection board 20b can be suitably selected according to the thickness of the tubular body 2 to shape | mold.
Moreover, the notch part formation member 20a and the pipe body 2 were fixed reliably by standingly setting the anchor part 21b in the important point of the back surface of the edge part protection board 20b.

A method for manufacturing a water stop structure according to Embodiment 3 configured as described above will be described below with reference to the drawings.
FIG. 9A is a schematic cross-sectional view of the main part showing the primer treatment process of the water stop structure in the third embodiment, and FIG. 9B is the main part showing the temporary joining process of the water stop structure in the third embodiment. FIG. 9C is a schematic cross-sectional view, FIG. 9C is a schematic cross-sectional view of the principal part showing the joint protection process of the water stop structure in Embodiment 3, and FIG. 9D is the water stop structure in Embodiment 3. It is a principal part cross-sectional schematic diagram which shows an external waterstop material filling process.

First, in FIG. 9A, a primer treatment process is performed in the same manner as in the second embodiment, and in FIG. 9B, a temporary bonding process is performed.
In FIG. 9B, 7b temporarily fixes the inner peripheral side of the end portion protection plate 20b of the opening portion end surface forming member 10a and the notch portion forming member 20a and is filled in an external water-stopping material filling step to be described later. It is a temporary fixing member that prevents leakage of the water blocking material 5.
Note that the material and fixing method of the temporary fixing member are the same as those in the second embodiment, and a description thereof will be omitted.
Next, the joint protection step in FIG. 9C and the external waterstop material filling step in FIG. 9D are performed. Since the joint protection process and the external waterstop filling process are the same as those in the second embodiment, description thereof is omitted.
Finally, the concrete placing step is performed as in the second embodiment. The anchor bars 4d of the joint protector 4, the anchor portion 11 of the opening end surface forming member 10a, the fixing embedded portion 21c of the notch forming member 20a, and the anchor portion 21b are embedded in the tubular bodies 1 and 2 by centrifugal molding. A tubular body having the water stop structure shown in FIG. 8A can be obtained.

As mentioned above, according to the water stop structure in Embodiment 3, in addition to the effect | action obtained in Embodiment 1 or 2, it has the following effects.
(1) The end face of the opening which is the tip of the thin part 2f of the tubular body 2 by having the end protection plate 20b covering the opening end face 2a of the thin part 2f on the inner peripheral side of the notch forming member 20a 2a can be prevented from coming into direct contact with the opening end face forming member 10a disposed on the opening end face 1a of the other tubular body 1, and the thin part 2f can be prevented from being damaged during deformation, etc. Excellent.
(2) When the joint protector 4 integrated with the external water-stopping material 5 and the opening end face forming member 10a and the notch forming member 20a are set in the mold frame and the concrete is put into the opening, Since the end protection plate 20b comes into contact with the surface of the end surface forming member 10a, the tip of the thin portion 2f (opening end surface 2a) can be prevented from sticking to the opening end surface forming member 10a during molding, and a release agent is applied. It is not necessary to do so and it is excellent in productivity.

(Embodiment 4)
FIG. 10A is a cross-sectional view of a main part showing a tubular body having a water stop structure in the fourth embodiment, and FIG. 10B is a tensile deformation of the pipe body having the water stop structure in the fourth embodiment. FIG. 10C is a cross-sectional view of the main part at the time of bending deformation of the tubular body having the water stop structure in the fourth embodiment.
In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1 thru | or 3, and description is abbreviate | omitted.
In FIG. 10, the tubular body having the water stop structure in the fourth embodiment is different from the first to third embodiments in that one tubular body 1 ′ is intermittently arranged in a zigzag manner in the circumferential direction in the middle of the longitudinal direction. The point which is provided with the flexible part 14 which has the some cut | interruption part 14a formed, and the cyclic | annular fixation extended to the one end part of the cylindrical part 24a and the cylindrical part 24a, and being fixed to the outer peripheral surface of tubular body 1 '. A flexible portion protector 24 having a portion 24 b is covered with the flexible portion 14, and the outer water blocking material 5 is filled between the outer peripheral surface of the tube 1 ′ and the inner surface of the flexible portion protector 24. Is a point. Reference numeral 14 b denotes a connection portion of the flexible portion 14, and 24 c denotes an opening portion of the flexible portion protector 24.
As materials for the tube body 1 ′ and the joint protector 24, metals such as steel, stainless steel, chrome steel, and carbon steel, synthetic resins, and the like can be used. In particular, those made of a synthetic resin that is lightweight and easy to process can be suitably used as cable pipes that are excellent in handleability and workability and do not require propulsion work.

The cut portion 14a of the flexible portion 14 can be formed in the same manner as the cut portion 4a of the joint protector 4 described above. By forming the flexible portion 14 at a displacement location such as the center in the longitudinal direction of the tubular body 1 ′, the flexible portion 14 can be deformed corresponding to an external force of tension or bending. In particular, since the cut portions 14a are arranged in a staggered manner, the cut portions 14a are opened in a mesh shape by an external force of tension or bending as shown in FIGS. Can be deformed. Further, since only one end side of the flexible part protector 24 is fixed to the tube 1 ′ by the annular fixing part 24b, the flexible part protector 24 is not restricted when the tube 1 ′ is deformed. The external water blocking material 5 can be expanded and contracted to maintain flexibility.
Since the cut portion 14a of the flexible portion 14 is covered by the flexible portion protector 24 integrated with the tube 1 ', the cut portion 14a of the flexible portion 14 opens when deformed by an external force. In addition, water can be reliably stopped by the external water stop material 5 bonded to the inner surface of the flexible part protector 24, and the reliability and durability of the water stop can be ensured. In particular, by forming the cut portion 14a of the flexible portion 14 at a position as far as possible from the opening 24c of the flexible portion protector 24 (on the side of the annular fixing portion 24b), the external water blocking material 5 is localized by bubbles or the like. Even if a flaw, a partial crack, etc. arise, it does not reach a fracture | rupture, can maintain airtightness and watertightness, and is excellent in reliability.

A method for manufacturing a water stop structure according to the fourth embodiment configured as described above will be described below with reference to the drawings.
FIG. 11A is a schematic cross-sectional view of a main part showing the primer treatment process of the water stop structure in the fourth embodiment, and FIG. 11B shows the flexible part protection process of the water stop structure in the fourth embodiment. It is a principal part cross-sectional schematic diagram.
First, in FIG. 11A, a primer treatment layer is formed on the outer periphery of the flexible portion 14 of the tubular body 1 ′ by the same primer treatment process as in the first to third embodiments.
Next, in FIG.11 (b), the flexible part protection body 24 is fixed to the outer periphery of the flexible part 14 of tube 1 'by a flexible part protection process. For fixing the tubular body 1 'and the annular fixing portion 24b of the flexible portion protector 24, a method such as adhesion, welding, or welding can be selected according to the material.
In addition, the primer processing layer 8 was formed in the part which adhere | attaches with the external water stop material 5 in the inner periphery of the flexible part protection body 24 similarly to Embodiment 1-3.
Finally, an external waterstop filling process is performed. Since one end side of the flexible part protection body 24 is fixed and closed to the tube body 1 ′ by the annular fixing part 24b, the flexible part protection is performed with the tube body 1 ′ standing so that the annular fixing part 24b faces down. By filling the external water-stopping material 5 from the opening 24c of the body 24, a tubular body having the water-stopping structure shown in FIG. 10 (a) can be obtained.

As mentioned above, according to the water stop structure in Embodiment 4, in addition to the effect | action of Embodiment 1 thru | or 3, it has the following effect | actions.
(1) Since the flexible portion 14 of the tubular body 1 'has a plurality of cut portions 14a formed intermittently in a zigzag manner in the circumferential direction, it can be deformed by external forces such as tension, bending, and twisting. The cable or the like housed inside the tube 1 'can be protected from external force.
(2) The flexible part protection body 24 is spaced from the outer peripheral side of the tubular body 1 ′ and is extended to one end of the tubular part 24 a and the tubular part 24 a that is covered with the flexible part 14. And the annular fixing portion 24b fixed to the outer peripheral surface of the flexible portion 14 can be protected by the cylindrical portion 24a. In particular, the flexible portion 14 can be protected by an external force or the like before the external water blocking material 5 is filled. Can be prevented from tearing.
(3) Since the external water blocking material 5 has fluidity before curing, it can be easily filled from the opening 24c of the flexible part protector 24, and the outer peripheral surface of the tube 1 'and the flexible part protector The inner surface of 24 can be securely adhered to ensure water-stopping.
(4) Since the external water-stopping material 5 after curing has elasticity, it can reliably follow the movement of the tubular body 1 ′ due to external force, and does not impair the flexibility of the flexible portion 14. Excellent reliability.

  The present invention ensures high airtightness and watertightness easily and reliably without impairing the flexibility of joints formed at the ends of various buried pipes and structures and flexible parts formed in the middle. It is possible to provide a water stop structure that is highly reliable, can be selectively bonded to other materials such as a water stop material and metal, has excellent design flexibility and versatility, is easy to install, and has excellent mass productivity. Structures such as fume pipes used as buried pipes for sewers, drainage channels, underground pipes and cable pipes, tunnels, box culverts, etc. Flexible part that can withstand earth pressure and water pressure after embedding, and is formed in the middle of the end joint or in the longitudinal direction in response to deformation in the earth such as during an earthquake It is possible to prevent defects and cracks, and to ensure airtightness and watertightness.

The principal part fracture | rupture side view which shows the pipe body provided with the water stop structure in Embodiment 1 (A) Side view at the time of deformation | transformation of the pipe body provided with the water stop structure in Embodiment 1 (b) A part enlarged view of Fig.2 (a) Sectional drawing of the principal part at the time of a deformation | transformation of the pipe body provided with the water stop structure in Embodiment 1. (A) Main part cross-sectional schematic diagram showing the primer treatment process of the water stop structure in Embodiment 1 (b) Main part cross-sectional schematic diagram showing the temporary joining process of the water stop structure in Embodiment 1 (c) Embodiment 1 is a schematic cross-sectional view of an essential part showing a joint protection process and an external waterproof material filling process of a water stop structure in FIG. The principal part fracture side view which shows the modification of the tubular body provided with the water stop structure in Embodiment 1 (A) Main part sectional view showing a pipe body provided with a water stop structure in the second embodiment (b) Main part cross sectional view at the time of deformation of the pipe body provided with the water stop structure in the second embodiment (A) Main part cross-sectional schematic diagram showing the primer treatment process of the water stop structure in the second embodiment (b) Main part cross-sectional schematic diagram showing the temporary joining process of the water stop structure in the second embodiment (c) 2 is a schematic cross-sectional view of the relevant part showing the step of filling the external water-stopping material of the water-stop structure in Embodiment 2. Cross-sectional view of relevant parts showing a tubular body having a water-stopping structure in Embodiment 3 (b) Cross-sectional view of relevant parts at the time of deformation of the tubular body having a water-stopping structure in Embodiment 3. (A) Main part cross-sectional schematic diagram showing the primer treatment process of the water stop structure in Embodiment 3 (b) Main part cross-sectional schematic view showing the temporary joining process of the water stop structure in Embodiment 3 (c) Embodiment 3 is a schematic cross-sectional view of an essential part showing a joint protection process of the water stop structure in FIG. 3 (d). FIG. (A) Main part sectional view showing a pipe body having a water stop structure in Embodiment 4 (b) Main part cross sectional view at the time of tensile deformation of a pipe body having a water stop structure in Embodiment 4 (c) Sectional drawing of the principal part at the time of the bending deformation of the pipe body provided with the water stop structure in Embodiment 4 (A) Main part cross-sectional schematic diagram showing the primer treatment process of the water stop structure in Embodiment 4 (b) Main part cross-sectional view showing the flexible part protection process of the water stop structure in Embodiment 4

Explanation of symbols

1, 1 ', 2 Tubing 1a, 2a Opening end face 1b, 2b Outer peripheral face 1c, 2c Notch 1d, 2d Notch face 1e, 2e Notch end face 1f, 2f Thin part 1g, 2g Fit part 3, 3a Joint recess 4 Joint protector 4a, 14a Cut 4b, 14b Connection 4c Filling port 4d, 21a Anchor bar 4e Fastener 5 External water blocking material 5a Clearance 6, 8 Primer treatment layers 7, 7a, 7b Temporary Fixing member 10, 20 Joining recess forming member 10a Opening end face forming member 11, 21, 21b Anchor portion 14 Flexible portion 20a Notch forming member 20b End protection plate
21c fixing embedded portions 22, 24c opening 24 flexible portion protector 24a cylindrical portion 24b annular fixing portion

Claims (11)

  Two pipes disposed opposite to each other at the end face of the opening, a joint recess formed on the outer periphery of the joint of the two pipes, and a flexible covering over the joint recess and fixed to the two pipes Joint protective body having a property, and an external water-stop material having fluidity before curing and having a stretchability that is filled in the joint recess and bonded to the inner surface of the joint recess and the inner peripheral surface of the joint protector And a water stop structure, wherein the joint protector has a cut portion formed intermittently.   Both or one of the two tubular bodies has a cutout portion formed on the outer periphery on the opening end face side, and the joining concave portion is (a) the cutout portion of the one tubular body. The notch surface and the end face of the notch and the opening end face of the other of the two pipes, or (b) the notch of the two pipes The water stop structure according to claim 1, wherein the water stop structure is formed by a notch portion surface and a notch end surface of the notch portion.   The two pipe bodies are made of concrete, and are formed at least on the surface of the notch section of the one pipe body, and on the end face of the opening of the other pipe body. The water stop structure according to claim 2, further comprising: a metal opening end face forming member disposed.   The two pipe bodies are made of concrete, and include metal joint recess forming members disposed on at least the notch surface and the end face of the two pipe bodies. The water stop structure according to claim 2.   5. The cutout portion according to claim 1, wherein the cut portion is formed in the cutout end face side at a position away from the opening facet within the cutout portion. Water stop structure.   A tubular body, a flexible portion having a plurality of cut portions intermittently formed in a zigzag manner in the circumferential direction of the tubular body, and spaced apart from the outer circumferential side of the tubular body and covered by the flexible portion A flexible part protector having a cylindrical part and an annular fixing part extending to one end of the cylindrical part and fixed to the outer peripheral surface of the tubular body; and the tubular body having fluidity before curing; And a stretchable external water-stopping material that is filled between the flexible part protector and adhered to the outer peripheral surface of the tube and the inner surface of the flexible part protector. Water stop structure.   The water stop structure according to any one of claims 1 to 6, wherein the external water stop material is liquid rubber.   The method for manufacturing a water stop structure according to any one of claims 1 to 5, wherein a temporary joining step of temporarily fixing the opening end faces of the two pipe bodies to form the joining recess, and the joining A joint protection step for disposing and fixing the joint protector on the outer periphery of the recess, and an external water sealant filling step for filling the inner surface of the joint recess and the inner peripheral surface of the joint protector with the external waterstop material. And a method for producing a water stop structure.   It is a manufacturing method of the water stop structure of Claim 3, Comprising: The temporary joining process of temporarily fixing the said notch part formation member and the said opening part end surface formation member, and forming the said joint recessed part, and the outer periphery of the said joint recessed part A joint protection step of disposing and fixing the joint protector; an external waterstop filling step of filling the external waterstop on the inner surface of the joint recess and the inner peripheral surface of the joint protector; A method for manufacturing a water-stopping structure, comprising: a joining step protecting body integrated through a water-stopping material; and a molding step for molding the tubular body by setting the joint recess in a mold. It is a manufacturing method of the water stop structure according to claim 4, A temporary joining process of temporarily fixing the joined crevice formation member and forming the joined crevice, and arranging the joined part protector on the perimeter of the joined crevice Integrating via the external water-stopping material, the joint-protecting step for fixing, the external water-stopping material filling step for filling the inner surface of the joint recess and the inner peripheral surface of the joint-protecting body with the external water-stopping material And a molding step of molding the tubular body by setting the joint protection body and the joint recess formed in a mold frame. It is a manufacturing method of the still water structure of Claim 6, Comprising: The flexible part formation process which forms the said cut part in the zigzag form intermittently in the circumferential direction of the said tubular body, and makes it the said flexible part, The tubular portion that is spaced apart from the outer peripheral side of the tubular body and is covered by the flexible portion, and the annular fixing portion that is extended to one end of the tubular portion and is secured to the outer peripheral surface of the tubular body. A flexible portion protecting step for fixing the flexible portion protective body, and an external water-stopping material filling step for filling the external water-stopping material with the tube standing so that the annular fixing portion is at the bottom. A method for producing a water stop structure.

Images