JP6124286B2 - Sealing material for preventing grouting outflow between inner tube and outer tube and its sealing structure - Google Patents

Description

  The present invention relates to a seal material for preventing grouting outflow between an inner tube and an outer tube and a seal structure thereof, and relates to a grout material filled between an inner tube such as a steel pipe pile and an outer tube such as a sheath tube. It is intended to prevent outflow, eliminates the need for special molds, etc., and increases the degree of freedom in dealing with dimensions such as the filling height of grouting materials and the diameter, etc. With a large diameter of 2000 mm or more It can cope with a large gap between the inner and outer cylindrical pipes and is suitable for construction of wind turbines for wind power generation at sea.

As one of the cases where it is necessary to seal the gap between the inner tube and the outer tube, as a basic part when constructing structures such as artificial islands and abutments, as an inner tube made of steel pipe or concrete After placing the pile into the ground, insert a sheath tube as an outer tube made of steel pipe or concrete so as to form a part of the structure, and fill the grout material between these piles. The pipe is integrally connected and fixed, and at the lower end of the sheath pipe, a grout outflow prevention sealing material is installed to prevent the grout material from flowing out from between the sheath pipe and the pile. A sealed structure is provided.
For example, when a wind turbine is installed on the sea, after a steel pipe pile (inner cylinder pipe) is driven into the seabed and fixed, a sheath pipe (outer cylinder pipe) having an inner diameter larger than the outer diameter of this steel pipe pile or the like is inserted. In addition, the grind material is filled between the sheath pipe and the steel pipe pile so as to be coupled and fixed.

  Conventionally, various grout outflow prevention seal materials and seal structures have been proposed to prevent the grout material from flowing out of the gap between the sheath pipe and the pile. Depending on the shape, the lip type seal material and the filling type seal material are proposed. And can be broadly divided.

For example, in Patent Document 1 as a lip-type sealing material, as shown in FIG. 9A, an annular sealing material 1 having an L-shaped cross section formed by an elastic body such as rubber is used. A short tubular fixing member 3 such as a steel pipe to be welded and fixed to the sheath tube 2 is integrated with the outer peripheral surface of the tube, and the sealing member is welded to the lower end portion of the sheath tube 2 by welding. Is constructed. And there exists what is comprised so that the sealing material 1 may be elastically deformed below and the front-end | tip may press-contact the outer surface of the pile 4, and may be sealed.
Further, for example, as shown in FIG. 9 (b), a seal member 1a having an I-shaped cross section is used, and an annular mounting bracket 5 is welded so as to protrude horizontally on the inner peripheral surface of the sheath tube 2, There is a type in which a sealing material 1a is placed and fastened with bolts and nuts 7 via an annular presser plate 6.
In the figure, 8 is a spacer.

  On the other hand, as a filling type sealing material, for example, in Patent Document 2, in a contracted state, the hollow elastic ring attached to the sheath tube is in close contact with the inner peripheral surface of the sheath tube, and in an expanded state in which a pressurized fluid is supplied, It is comprised so that it may be closely_contact | adhered between the play of a pile and a sheath pipe, respectively, and it may be set as a seal state.

JP 09-88050 A Japanese Patent Laid-Open No. 02-85413

Such a conventional lip seal material seal structure has a problem that it is necessary to change the structure, shape, thickness, etc. of the seal material depending on various conditions such as the height of the grout material and the size of the play.
In addition, there is a problem that a manufacturing facility is required depending on the diameter of the sealing material.
Furthermore, when mounting the outer cylinder pipe on the pile, it is necessary to push in the sealing material attached to the outer cylinder pipe, and there is a problem that the resistance is large due to the contact of the lip portion with the inner peripheral surface of the pile. There is.

On the other hand, in the case of a sealing structure using a filling type sealing material, as in the case of a lip type sealing material, it is necessary to change the structure, shape, thickness, etc. of the sealing material depending on various conditions such as the height of the grout material and the size of the play. At the same time, there is a problem that a manufacturing facility is required for each diameter of the sealing material.
Further, since the sealing material has a hollow portion or a complicated shape in the cross section, there is a problem that it is necessary to manufacture it using a dedicated mold, resulting in an increase in manufacturing cost.
Furthermore, both lip-type sealing materials and filling-type sealing materials require a dedicated manufacturing facility and a corresponding large die when trying to cope with large diameters with a diameter of 2000 mm or more and large play. There are problems such as being unable to.

  The present invention has been made in view of the problems of the prior art, and can be manufactured by using a dedicated mold that can be easily changed in structure, shape, thickness, etc. depending on conditions such as the height of the grout material to be cast and the diameter. An attempt to provide a sealing material for preventing outflow of grout between an inner tube and an outer tube, and its sealing structure, which is unnecessary and excellent in versatility, and can be easily installed without applying a large load to the sealing material. Is.

In order to solve the above-mentioned problems, the seal material for preventing the grouting outflow between the inner tube and the outer tube according to claim 1 of the present invention is provided between the inner tube and the outer tube disposed outside thereof. A sealing material for preventing the outflow of the grout material to be injected between the inner tube and the outer tube, which folds out both ends in the width direction of elastic materials such as flat rubber and synthetic resin. Along with this, both ends in the longitudinal direction orthogonal to this are joined to form a double ring, and the folded part of this double ring elastic body is attached along the inner peripheral surface of the outer tube, inside the double annular Ri Na held configured to be able to be filled fill fluid is pressurized in contact with the inner and outer cylinders tube the Joint Gap hermetically, the tabular of the elastic material, woven with fibers There are few reinforcement members embedded obliquely Also the reinforcing member of the folded portion is characterized in Rukoto such stretching is configured to be capable for attachment to the outer cylindrical tube.
According to a second aspect of the present invention, there is provided a seal material for preventing the grouting outflow between the inner tube and the outer tube, which is a grouting material injected between the inner tube and the outer tube disposed outside thereof. A sealing material for preventing grouting outflow between the inner tube and the outer tube that prevents outflow, which folds both ends in the width direction of elastic materials such as flat rubber and synthetic resin, and is orthogonal to this. Both ends in the longitudinal direction are joined to form a double ring shape, and the folded portion of the double ring elastic body is attached along the inner peripheral surface of the outer tube and attached to the inside of the double ring shape. The filling fluid is pressurized and filled so that it can contact the inner and outer cylindrical tubes and can keep the gap in a sealed state. The flat elastic material has a reinforcing member embedded therein, and at least the folding member. The reinforcing member of the overlapping portion is attached to the outer tube. Stretching of the eye can be arranged in parallel along the width direction, between the folded portion and is characterized by comprising constructed by combining fibers arranged obliquely.

In addition to the structure according to claim 1 or 2, the grouting outflow prevention sealing material between the inner tube and the outer tube according to claim 3 of the present invention includes Through holes for attachment to stud bolts provided on the inner peripheral surface of the outer tube are formed at equal intervals.

  In addition to the structure according to any one of claims 1 to 3, the grout outflow prevention seal material between the inner tube and the outer tube according to claim 4 of the present invention has an inner diameter dimension of the double annular shape. The outer cylindrical tube is formed to have the same or larger diameter than the outer diameter of the inner cylindrical tube, and is dimensioned so that the gap can be maintained in a sealed state by the expansion of the filling fluid pressurized and filled in the double annular shape. It is characterized by.

In addition to the structure according to any one of claims 1 to 4 , the flat elastic material is a grout outflow prevention sealing material between the inner tube and the outer tube according to claim 5 of the present invention. It is characterized by being vulcanized in the form of a flat plate or by being vulcanized by folding both end portions in the width direction.

According to a sixth aspect of the present invention, there is provided a seal structure for preventing a grouting outflow between the inner cylinder pipe and the outer cylinder pipe. The seal structure for the grouting material to be injected between the inner cylinder pipe and the outer cylinder pipe arranged outside thereof is provided. A grout outflow prevention seal structure between an inner tube and an outer tube for preventing outflow, wherein the reinforcing member is embedded in the elastic material according to any one of claims 1 to 5 . The seal material is used, and the folded portion of the double-ring elastic body of the grout outflow prevention seal material is stretched along the inner peripheral surface of the outer tube and attached via a pressing member. The inside of the double ring is filled with a filling fluid under pressure so as to contact the inner and outer cylindrical tubes and be able to hold the gap in a sealed state.

According to a seventh aspect of the present invention, the seal structure for preventing the grouting outflow between the inner tube and the outer tubular tube is the one for preventing the grouting outflow in addition to the structure according to the sixth aspect , wherein no through hole is formed in the folded portion. The sealing material is applied to the folded portion via a fastening member that extends and abuts the folded portion along the inner peripheral surface of the outer cylindrical tube, and fastens to a stud bolt attached to the outer tubular tube. It is fixed through a pressing member.

According to an eighth aspect of the present invention, there is provided a seal structure for preventing the grouting outflow between the inner tube and the outer tubular tube, in addition to the structure described in the sixth aspect , the grouting outflow prevention in which a through hole is formed in the folded portion. The sealing material is characterized in that the through hole is attached to a stud bolt that is stretched and attached to the outer tube, and is fixed via the pressing member.

According to the grouting outflow prevention sealing material between the inner tube and the outer tube according to the first aspect of the present invention, the grout injected between the inner tube and the outer tube disposed outside thereof. It is a sealing material for preventing grouting outflow between the inner tube and the outer tube that prevents the material from flowing out, and folds both ends in the width direction of the elastic material such as flat rubber and synthetic resin. Both ends in the longitudinal direction perpendicular to each other are joined to form a double annular shape, and the folded portion of the double annular elastic body is attached along the inner peripheral surface of the outer tube and attached to the double annular shape. internal Ri Na held configured to be able to be filled fill fluid is pressurized in contact with the inner and outer cylinders tube the Joint Gap hermetically to, the tabular of the elastic material, at an angle not woven with fibers The reinforcing member in an intersecting state is embedded and at least the folded The reinforcing member is stretched is configured to be capable in a Runode, hitting設高sheath required grout as grout outflow preventing seal material, diameter and Joint Gap each condition such as for attachment to the outer cylindrical tube Even if it changes, it is sufficient to change the size of the flat elastic material, overlap the width direction both ends and fold it in half, join both ends in the longitudinal direction to make a double ring shape, and seal for preventing grout outflow under different conditions The material can be easily manufactured.
Further, even when the height of the grout material is increased by adjusting the pressure of the filling fluid filled in the double annular hollow portion, it is possible to cope with the grout outflow prevention sealing material having the same shape.
Furthermore, by extending the attachment to the outer cylinder pipe so that the folded portion is along the inner peripheral surface, a clearance with the inner cylinder pipe can be secured, and the attachment to the outer cylinder pipe or the inner cylinder pipe can be secured. Installation such as mounting on can be done easily.
Further, the flat elastic material is embedded with a reinforcing member obliquely intersecting without interweaving fibers, and at least the reinforcing member of the folded portion can be extended for attachment to the outer tube. By being configured, it is possible to increase the pressure resistance of the filling fluid that fills the hollow portion, it is possible to increase the height of the grout material that can be placed at once, and to embed a reinforcing member during construction Construction can be carried out without hindrance in the same way as those that do not.
According to the sealing material for preventing a grouting outflow between the inner tube and the outer tube according to claim 2 of the present invention, the grouting injected between the inner tube and the outer tube disposed outside thereof. It is a sealing material for preventing grouting outflow between the inner tube and the outer tube that prevents the material from flowing out, and folds both ends in the width direction of the elastic material such as flat rubber and synthetic resin. Both ends in the longitudinal direction perpendicular to each other are joined to form a double annular shape, and the folded portion of the double annular elastic body is attached along the inner peripheral surface of the outer tube and attached to the double annular shape. The inside is filled with pressurized fluid and is configured to be in contact with the inner and outer cylindrical tubes so that the gap can be maintained in a sealed state. A reinforcing member is embedded in the flat elastic material while at least The reinforcing member of the folded portion is attached to the outer tube. The stretching for the cutting is possible in parallel along the width direction, and is formed by combining fibers arranged obliquely between the folded portions, so it is necessary as a sealing material for preventing grout outflow. Even if the conditions such as the height of the grout material, the caliber, and the clearance change, the size of the flat elastic material is changed, the width direction end portions are overlapped and folded in two, and the longitudinal direction both end portions are joined together. What is necessary is just to make it a double ring, and the grout outflow prevention sealing material from which conditions differ can be manufactured easily.
Further, even when the height of the grout material is increased by adjusting the pressure of the filling fluid filled in the double annular hollow portion, it is possible to cope with the grout outflow prevention sealing material having the same shape.
Furthermore, by extending the attachment to the outer cylinder pipe so that the folded portion is along the inner peripheral surface, a clearance with the inner cylinder pipe can be secured, and the attachment to the outer cylinder pipe or the inner cylinder pipe can be secured. Installation such as mounting on can be done easily.
In addition, a reinforcing member is embedded in the flat elastic material, while at least the reinforcing member of the folded portion is arranged in parallel along the width direction so that it can be extended for attachment to the outer tube. Between the overlapping parts, it is possible to increase the pressure resistance of the filling fluid that fills the hollow part by combining fibers arranged obliquely, and to increase the height of the grout material that can be placed at one time. In addition, during construction, construction can be performed without hindrance in the same manner as a construction in which a reinforcing member is not embedded.

According to the sealing material for preventing the grouting outflow between the inner tube and the outer tube according to claim 3 of the present invention, the double annular folded portion is provided on the inner peripheral surface of the outer tube. Since the through holes for mounting to the stud bolts are formed at equal intervals, the through holes of the grout outflow prevention sealing material can be evenly extended by being attached to the stud bolts provided on the inner periphery of the outer tube In addition to being able to be easily attached without preparing a jig or the like, welding for attachment may be performed only with a stud bolt, and the welding amount can be reduced.
Further, the processing for attaching the grout outflow prevention sealing material to the outer cylinder tube may be performed by processing the through hole corresponding to the stat bolt, and the processing can be simplified.

  According to the sealing material for preventing grouting outflow between the inner tube and the outer tube according to claim 4 of the present invention, the inner diameter of the double ring is the same as or larger than the outer diameter of the inner tube. And is formed in such a dimension that the gap can be maintained in a sealed state by expansion by a filling fluid that is pressurized and filled in the inside of the double ring. By forming the material, it can be smoothly attached to the inner tube without resisting a large resistance, and the gap is completely sealed by filling the filling fluid into the double annular shape. Can do.

According to the sealing material for preventing the grouting outflow between the inner tube and the outer tube according to claim 5 of the present invention, the flat elastic material is vulcanized while being flat, or both ends in the width direction. Since it is configured to be vulcanized by folding it, it can be vulcanized with a small pressing force using a simple mold by vulcanizing with a flat plate shape, while folding both ends in the width direction. By overlapping and vulcanizing, when bending both ends in the longitudinal direction to form a double ring shape, the bending resistance is small and a stable shape can be obtained.

According to the seal structure for preventing the outflow of the grout between the inner tube and the outer tube according to claim 6 of the present invention, the grout injected between the inner tube and the outer tube disposed outside thereof. A grout outflow prevention seal structure between an inner tube and an outer tube that prevents the material from flowing out, wherein the grout outflow has a reinforcing member embedded in the elastic material according to any one of claims 1 to 5. While using a sealing material for prevention, the folded portion of the double annular elastic body of the sealing material for preventing grout outflow is stretched along the inner peripheral surface of the outer tube and attached via a pressing member, Since the inside of the double ring is pressurized and filled with a filling fluid so as to come into contact with the inner and outer cylinder pipes and to keep the gap in a sealed state, a grout material necessary as a grout outflow prevention sealing material is formed. Various conditions such as placement height, caliber and gap Even if it changes, it is sufficient to change the size of the flat elastic material, overlap the width direction both ends and fold it in half, join both ends in the longitudinal direction to make a double ring shape, and seal for preventing grout outflow under different conditions The material can be easily manufactured and sealed.
In addition, even when the height of the grout material is increased by adjusting the pressure of the filling fluid that fills the double annular hollow part, it is possible to achieve a sealed state with the same shape of the grout outflow prevention sealing material. It becomes.
Furthermore, by extending the attachment to the outer cylinder pipe so that the folded portion is along the inner peripheral surface, a clearance with the inner cylinder pipe can be secured, and the attachment to the outer cylinder pipe or the inner cylinder pipe can be secured. Installation such as mounting on can be done easily.

According to the seal structure for preventing grout outflow between the inner tube and the outer tube according to claim 7 of the present invention, the seal material for preventing grout outflow that does not form a through hole in the folded portion is the folded The portion is stretched along the inner peripheral surface of the outer tube and brought into contact with the outer tube, and is fixed via the presser member applied to the folded portion through a fastening member that is tightened to a stud bolt attached to the outer tube. Therefore, there is no need to process through holes in the grout outflow prevention sealing material, and it can be fixed with a presser member applied to the folded part via a tightening member that is tightened to the stud bolt. The seal material can be easily manufactured.

According to the grout outflow prevention seal structure between the inner tube and the outer tube according to claim 8 of the present invention, the grout outflow prevention seal material in which the through hole is formed in the folded portion is extended. Since the through hole is attached to the stud bolt attached to the outer tube and fixed through the pressing member, the stud provided with the through hole of the grout outflow prevention sealing material on the inner periphery of the outer tube By extending it so that it can be attached to the bolt, it can be installed evenly, and it can be easily installed without preparing a jig, etc. Can be reduced.
In addition, the processing for attaching the grout outflow prevention sealing material to the outer tube is only required to process the through holes corresponding to the stat bolts at equal intervals, and the processing can be simplified.

1 is a partial front view of an elastic material constituting a seal material according to an embodiment of a seal material for preventing a grout outflow between an inner tube and an outer tube of the present invention and a seal structure thereof. It is sectional drawing of the state made into the double ring shape concerning one Embodiment of the sealing material for the grout outflow prevention between the inner cylinder pipe of this invention, and an outer cylinder pipe, and its seal structure. It is explanatory drawing of the process made from the flat elastic raw material to a double ring shape concerning one Embodiment of the sealing material for the grout outflow prevention between the inner cylinder pipe and outer cylinder pipe of this invention, and its seal structure. It is a cross-sectional view of a state in which the grout outflow prevention sealing material between the inner tube and the outer tube of the present invention and the seal structure thereof are attached to the sheath tube. It is explanatory sectional drawing at the time of extending according to one Embodiment of the sealing material for grout outflow prevention between the inner cylinder pipe of this invention, and an outer cylinder pipe, and its seal structure, and attaching to a sheath pipe. It is a cross-sectional view of a sealed state according to one embodiment of the sealing material for preventing outflow of grout between the inner tube and the outer tube of the present invention and its seal structure. It is explanatory drawing of the lamination direction of the fiber of the reinforcement member concerning one Embodiment of the sealing material for grout outflow prevention between the inner cylinder pipe of this invention, and an outer cylinder pipe, and its seal structure. FIG. 6 is a cross-sectional view of a state in which the seal material for preventing outflow of a grout between the inner tube and the outer tube of the present invention and the seal structure thereof according to another embodiment is attached to the sheath tube by another method. . Each of the conventional seal structures for preventing outflow of grout between the inner tube and the outer tube is a partial cross-sectional view.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, for a grout outflow prevention sealing material (hereinafter simply referred to as a sealing material) 10 between an inner cylinder pipe and an outer cylinder pipe, a pile 4 that is an inner cylinder pipe and a sheath pipe 2 that is an outer cylinder pipe are provided. A case where the grout material to be placed in the gap d is sealed will be described as an example.
This sealing material 10 is used by being attached to the inner peripheral surface of the sheath tube 2.
Then, after placing the pile (steel pipe pile) 4 on the ground such as the sea, the seal material 10 is attached to the inner periphery of the sheath tube 2 and inserted into the pile 4 and the outflow of the grout material In order to prevent this, there is a so-called filling type sealing material in which the gap d is inflated by being filled with a filling fluid 12 under pressure.

  This sealing material 10 is different from the conventional filling type sealing material that is manufactured in advance according to the shape of the state of being attached to the sheath tube. As shown in FIGS. A flat elastic material 10a is made of resin or the like, and both end portions 10b in the width direction of the flat elastic material 10a are folded together, and both end portions 10c in the longitudinal direction perpendicular to the width direction are joined together. A double ring 10d is formed.

As shown in FIG. 3, the flat elastic material 10a such as rubber or synthetic resin is formed by laminating a reinforcing member 16 on the elastic material 10a to form a reinforced flat elastic material 10a (see FIG. 3). a)).
Thereafter, the elastic material 10a is vulcanized. In the case of vulcanization, as shown in FIG. 5B, the elastic material 10a is inserted into the mold 18 in the form of a flat plate, pressurized and heated with a press. As shown in FIG. 5C, vulcanization is performed by inserting the U-shaped mold 19 that can be folded in both ends in the width direction, and heating it in the folded state. Is called.
The elastic material 10a thus vulcanized is formed into a double ring 10d by joining both longitudinal ends 10c perpendicular to the width direction (see FIG. 4D).
By selecting the shape for vulcanizing such an elastic material 10a, when pressurizing and heating in the form of a flat plate, the press used may be small, and the mold 18 is also inexpensive.
On the other hand, when vulcanizing in a folded state in advance, there is no bending resistance at the tip and the shape is stable.

  For attaching the sealing material 10 to the sheath tube 2, as shown in FIGS. 4 and 5, for example, stud bolts 13 are welded to the inner peripheral surface 2 a of the sheath tube 2 at equal intervals and implanted. deep. On the other hand, in the sealing material 10, the same number of through holes 10 f as the stud bolts 13 are formed at equal intervals in the folded portion 10 e at the lower end of the double ring 10 d, and the folded portion 10 e of the sealing material 10 is covered with the sheath. The stud bolt 13 is fitted with a through hole 10f while being stretched along the inner peripheral surface 2a of the pipe 2, and a pressing member 14 made of steel or the like divided into a plurality of parts in the circumferential direction is attached to the stud bolt 13 and applied. It is attached by tightening with a washer and nut 15 from the outside.

  In this way, by attaching the folded portion 10e to the inner peripheral surface 2a of the sheath tube 2 so as to extend, the folded portion 10e at the lower end portion of the double annular sealing material 10 is stretched and crimped and sealed, From the middle part to the upper end part, the shape of the double ring shape before the attachment is maintained, and the lower end part has a hollow part 11 whose diameter is expanded and sealed by the folded part 10e.

Then, a filling fluid supply hole 10g communicating with the sealed hollow portion 11 of the sealing material 10 is provided through the sheath tube 2, and the filling fluid supply means 12a is connected to the filling fluid supply hole 10g and pressurized filling fluid. 12 is pressurized and filled in the hollow portion 11 of the sealing material 10.
Then, as shown in FIG. 6, the sealing material 10 swells and its inner peripheral surface 10 h comes into close contact with the outer peripheral surface 4 a of the pile 4, and the outer peripheral surface 10 i of the sealing material 10 comes into close contact with the inner peripheral surface 2 a of the sheath tube 2. Thus, the gap d can be in a sealed state. And the adhesion pressure of the sealing material 10 according to the pressure of the filling fluid 12 is obtained, and by increasing the pressure of the filling fluid 12, the adhesion strength of the sealing material 10 is increased and the grout material placed on the upper portion of the sealing material 10. Can be prevented from flowing out.
Note that a pressurized liquid or a pressurized gas is used as the filling fluid.

  In such a sealing material 10, it is not necessary to prepare a shape or a mold according to the diameters of the outer peripheral pipe 2 and the inner peripheral pipe 4 and the gap d, and elastic such as a flat rubber or synthetic resin. The material 10a can be supported by the length (peripheral length) and width with respect to the pipe diameter and clearance, and basically it is possible to easily cope with the sealing material 10 with different conditions by simply making a flat elastic material 10a. Can be produced.

  Further, the height of the grout material can be dealt with by adjusting the pressure of the filling fluid 12 to the hollow portion 11 of the seal material 10 and by increasing the height of the seal material 10 itself. In this case, the width of the elastic material 10a such as a flat rubber or synthetic resin is formed to be large, and the height of the sealing material 10 is increased in the case of being folded in half, so that the inner and outer peripheral pipes 2, 4 It can be easily handled by increasing the contact height.

Further, a laminated structure in which a reinforcing cloth as a reinforcing member 16 is embedded in an elastic material 10a such as a flat rubber or synthetic resin of the sealing material 10 can be used. It is desirable to consider the weaving method of the reinforcing member itself and the embedding direction with respect to the elastic material 10a so as not to hinder the stretching at the time.
For example, in the case where the fibers constituting the reinforcing fabric are woven so as to be entangled with each other, there is a problem in stretching, so the direction of the fibers is set as follows, for example, as shown in FIG.
For example, as shown in FIG. 5A, the fiber 16a is arranged only in parallel along the width direction of the flat elastic material 10a. As shown in FIG. The fiber 16b is arranged obliquely with respect to the width direction, as shown in FIG. 5C, the fibers 16b and 16c are arranged in an obliquely intersecting state without being woven, and the figure (d) ), The fibers 16a are arranged in parallel to the width direction at both ends in the width direction of the flat elastic material 10a to be folded and attached to the sheath tube 2 to be attached to the sheath tube 2, and between these, What combined the arrangement | positioning of the fiber 16b diagonally etc. are preferable.
The material of the fiber itself is not particularly limited, as long as it is used for reinforcement of ordinary rubber / synthetic resin, and is not limited to a continuous long fiber but may be a short fiber.

Since such a sealing material 10 is attached to the outer peripheral surface of the pile 4 by being attached to the inner peripheral surface 2a of the sheath tube 2 which is an outer cylindrical tube, the inner diameter dimension of the sealing material 10 is the same as the outer diameter of the pile 4. It is possible to minimize the resistance at the time of mounting by setting the size to be slightly large, preferably not to contact the outer peripheral surface 4a of the pile 4 when mounted on the pile 4. On the other hand, if the inner diameter dimension of the sealing material 10 is excessively increased, the hollow portion 11 is inflated because it does not function as the sealing material 10 if it does not come into contact with the pile 4 even if the hollow portion 11 is inflated by pressurizing and filling the filling fluid 12. Needless to say, it can be sealed with.
Further, if the inner diameter of the sealing material 10 is made smaller than the outer diameter of the pile 4, wrinkles are generated when the filling fluid 12 is inflated by pressure filling, and the grout material may leak therefrom.

Further, the sealing material 10 is attached to the sheath tube 2 by welding the stud bolts 13 to the inner peripheral surface 2a of the sheath tube 2 at equal intervals, and the stud bolts being attached to the folded portion 10e at the lower end portion of the sealing material 10. The same number of through holes 10f as 13 are formed, and the through holes 10f are attached to the stud bolts 13 in a state where the sealing material 10 is extended, and then tightened with washers and nuts 15 via the pressing members 14. In addition, the sealing material 10 may be attached without forming a through hole.
For example, as shown in FIG. 8, stud bolts 13 are welded to the inner peripheral surface 2 a of the sheath tube 2 at equal intervals, and the folded portion 10 e at the lower end of the sealing material 10 is extended to extend the sheath tube 2. Along with the inner peripheral surface 2a, the presser member 14 is applied to the stud bolt 13, and the clamp member 17 is fastened with a washer and a nut 15 by pressing it with the tip of the clamp member 17 that fastens the intermediate part. This eliminates the need for processing a through hole in the sealing material 10 and facilitates production.
In addition, in order to extend and follow the inner peripheral surface 2a of the sheath tube 2, it is easy to extend the work by preparing an extension jig or the like having a turn buckle that extends the diagonal position in the middle part. And the folded portion 10e can be uniformly extended.

In each of the above embodiments, the grout outflow prevention sealing material that seals the gap between the sheath pipe and the pile and the seal structure thereof have been described as an example, but not limited thereto, the outer tube and the inner tube The present invention can be widely applied as a sealing material that seals the gap between them and its sealing structure.
Further, by providing a sealing ridge in an annular shape on at least one of the inner and outer peripheral surfaces of the double ring, the contact pressure can be increased by the annular sealing ridge, which further increases the clearance. The sealing property can be improved, and the height of the grout material can be increased.

2 sheath tube (outer tube)
2a Inner peripheral surface 4 Pile (inner tube)
4a Outer peripheral surface 10 Sealing material for preventing outflow of grout between inner tube and outer tube (seal material)
10a Flat elastic material 10b Both ends in width direction 10c Both ends in longitudinal direction 10d Double ring 10e Folding portion 10f Through hole 10g Filling fluid supply hole 10h Inner peripheral surface 10i Outer peripheral surface 11 Hollow portion 12 Filling fluid 12a Filling fluid supply means 13 Stud bolt 14 Holding member 15 Washer and nut 16 Reinforcement member 16a Fiber 16b Fiber 16c Fiber 17 Tightening member 18 Mold (flat plate shape)
19 Mold (U-shaped)
d Yuma

Claims (8)

A seal material for preventing grouting outflow between the inner tube and the outer tube, which prevents outflow of the grouting material injected between the inner tube and the outer tube disposed outside thereof,
While folding both ends in the width direction of an elastic material such as flat rubber and synthetic resin, both ends in the longitudinal direction orthogonal to this are joined to form a double ring,
The folded portion of the double annular elastic body is attached by extending along the inner peripheral surface of the outer cylindrical tube, and the inside of the double annular is pressurized and filled with a filling fluid to contact the inner and outer cylindrical tubes. Ri Na is capable of holding up the Joint Gap hermetically and,
The flat elastic material has a reinforcing member embedded obliquely without interweaving fibers, and at least the reinforcing member of the folded portion can be extended for attachment to the outer tube. grout outflow preventing seal member between the cylinder tube and the outer cylinder tube inside, wherein Rukoto such are configured. A seal material for preventing grouting outflow between the inner tube and the outer tube, which prevents outflow of the grouting material injected between the inner tube and the outer tube disposed outside thereof,
While folding both ends in the width direction of an elastic material such as flat rubber and synthetic resin, both ends in the longitudinal direction orthogonal to this are joined to form a double ring,
The folded portion of the double annular elastic body is attached by extending along the inner peripheral surface of the outer cylindrical tube, and the inside of the double annular is pressurized and filled with a filling fluid to contact the inner and outer cylindrical tubes. And is configured to be able to hold the gap in a sealed state,
A reinforcing member is embedded in the flat elastic material, while at least the reinforcing member of the folded portion is arranged in parallel along the width direction so that the reinforcing member can be extended for attachment to the outer tube. , between the folded portion, grout flows out preventing seal material between the inner tube and the outer tube tube you characterized by comprising consists of the combined fibers arranged obliquely. The through-hole for attachment to the stud bolt provided in the internal peripheral surface of an outer cylinder pipe is formed in the said double annular folding part at equal intervals, The Claim 1 or 2 characterized by the above-mentioned. Grout outflow prevention seal material between inner tube and outer tube.   The inner diameter of the double ring is formed to be the same as or larger than the outer diameter of the inner tube, and the clearance is sealed by expansion by a filling fluid that is pressurized and filled inside the double ring. The sealing material for preventing grout outflow between the inner tube and the outer tube according to any one of claims 1 to 3, wherein the seal member is formed to have a dimension capable of being held. Flat of the elastic material is still vulcanization tabular, or of according to any one of claims 1 to 4 by folding a widthwise end portions, characterized by comprising to be constituted by vulcanized Sealing material for preventing grout outflow between the tube and the outer tube. A grout outflow prevention seal structure between the inner tube and the outer tube that prevents the outflow of the grout material injected between the inner tube and the outer tube disposed outside thereof,
Using a grout outflow prevention sealing material in which a reinforcing member is embedded in the elastic material according to any one of claims 1 to 5 ,
While the folded portion of the double annular elastic body of the seal material for preventing outflow of the grout is stretched along the inner peripheral surface of the outer tube and attached through the pressing member,
The inside of the double ring is filled with a filling fluid under pressure so as to come into contact with the inner and outer cylindrical tubes and to keep the gap in a sealed state. Seal structure for preventing grout outflow. The grout outflow prevention sealing material that does not form a through hole in the folded portion extends the folded portion along the inner peripheral surface of the outer tube, and makes contact with the folded portion.
The inner cylinder pipe and the outer cylinder pipe according to claim 6 , wherein the inner cylinder pipe and the outer cylinder pipe are fixed via the holding member applied to the folded portion via a fastening member fastened to a stud bolt attached to the outer cylindrical tube. Seal structure for preventing grout leakage between the two. The grout outflow prevention sealing material having a through-hole formed in the folded portion is extended, and the through-hole is attached to a stud bolt attached to the outer tube, and is fixed through the presser member. The grout outflow prevention seal structure between the inner tube and the outer tube according to claim 6 .

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