JP3896104B2 - Seal for preventing leakage of filler and construction method of substructure - Google Patents

Description

  The present invention is applied to the inside of a tubular strut of a foundation structure used as a foundation of a marine structure such as a bridge or a breakwater, and leakage of a filler filled in a gap portion between the strut and a pile inserted into the strut The present invention relates to a sealing material for preventing leakage of fillers, and a method for constructing a foundation structure that is submerged in the sea and installed on a seabed ground and used as a foundation for a marine structure such as a bridge or a breakwater.

Conventionally, as a foundation for offshore structures such as bridges, breakwaters, piers, offshore airports, oil drilling jackets, etc., a foundation structure that is assembled in the shape of a tower using a plurality of tubular struts as vertical members and beams and connecting members as horizontal members. Things are used. After such a substructure is assembled on land, it is submerged in the sea and installed on the submarine ground to support the offshore structure in the sea.
By the way, in order to fix such a foundation structure on the seabed ground, generally, a pile such as a steel pipe pile is inserted into the tubular strut of the foundation structure submerged in the seabed and driven into the seabed ground. A method of injecting a solid material called a grout material into a gap between a column and a pile and solidifying the same is used. At this time, in order to prevent the filler injected into the gap between the pillar and the pile inside the pillar from leaking into the sea from the lower end of the pillar, rubber or the like that is attached to the gap between the pillar and the pile, etc. Annular seals are used.
As such a seal, Patent Document 1 discloses a “steel pipe pile foundation seal”. Hereinafter, the “steel pipe pile foundation seal” of Patent Document 1 will be described with reference to FIG.
FIG. 7 is a cross-sectional view of the main part of the steel pipe pile foundation seal of Patent Document 1.
In FIG. 7, Y is a tubular support column of a foundation structure such as a bridge or breakwater, K is a pile such as a steel pipe pile inserted into the support column Y and placed on the seabed ground, and 101 is a gap between the support column Y and the pile K. The annular steel pipe pile foundation seal 102 is attached, 102 is a pillar abutting part that abuts the pillar Y of the steel pipe pile foundation seal 101, and 103 is an inclination inclined downward from the lower part of the pillar abutting part 102 toward the pile K. Reference numeral 104 denotes a pile contact surface that is formed at the tip of the inclined portion 103 and contacts the pile K, and 105 is a filler such as concrete that is injected and filled into the gap between the support column Y and the pile K.
As shown in FIG. 7, the steel pipe pile foundation seal 101 includes a column abutting portion 102 that abuts the column Y, an inclined portion 103 that is inclined downward from the lower portion of the column abutting portion 102 toward the pile K, and a pile K. And a pile abutting surface that abuts on the gap, and the gap between the support Y and the pile K is closed to prevent the filler 105 from leaking into the sea from the lower end of the support Y.

JP 2000-38731 A

However, the above conventional techniques have the following problems.
(1) Since the inclined portion 103 of the steel pipe pile foundation seal 101 is inclined downward, the inclined portion 103 is moved downward due to the pressure of the filler 105 filled in the gap portion between the support column Y and the pile K due to its own weight or the like. When the pressure is pressed and the pressing force becomes larger than the elastic force of the inclined portion 103, the pile contact surface 104 is separated from the pile K and the filler 105 leaks out, so that the pressing force due to the weight of the filler 105 does not increase. In a large-scale foundation structure in which the injection amount of the material 105 is limited and the pressure of the filler 105 becomes high, the filler 105 has to be driven several times, which increases work man-hours and improves workability. It had the problem of lacking.
(2) Since the strut abutting portion 102 is only elastically pressed against the strut Y, the position of the steel pipe pile foundation seal 101 is shifted or a gap is generated as the pile K is inserted or hit. However, there is a problem that the filler is easily leaked.

The present invention solves the above-described conventional problems, and is installed inside a tubular column of a foundation structure used as a foundation of a marine structure such as a bridge or a breakwater, and a gap portion between the column and the inserted pile. It is possible to prevent the filling material filled in the tank from leaking into the sea from the lower end of the support column, especially when the filling amount of the filler in the gap between the support column and the pile is large in a large-scale foundation structure. It is an object of the present invention to provide a filler leakage prevention seal that can reliably prevent the leakage and can fill all the fillers in a single injection operation, and thus does not require man-hours and has excellent workability.
In addition, the present invention solves the above-described conventional problems. When a foundation structure used as a foundation of a marine structure such as a bridge or a breakwater is submerged in the sea and installed and fixed on the submarine ground, a column and a pile are provided. It is possible to reliably prevent the filler filled in the gap with the sea from leaking into the sea, and to carry out the construction work smoothly and quickly without polluting the sea. It provides excellent workability without complicated installation work on site, and provides a method for constructing foundation structures with excellent workability by significantly reducing man-hours because the filling material can be completed in a single filling operation. The purpose is to do.

In order to solve the above problems, the filler leakage prevention seal of the present invention has the following configuration.
The seal for preventing leakage of filler according to claim 1 of the present invention is attached to a gap between a tubular column and a pile inserted into the column, and the filler filled in the gap is a lower end of the column. A seal for preventing leakage of a filler for preventing leakage from a part, which is arranged and fixed along the inner wall of the column or along the inner wall of a mounting member attached to the inner wall of the column A projecting portion projecting from the base portion with a projecting length larger than at least the width of the gap portion, and extending from the tip end portion of the projecting portion to the base portion side in an upward direction. And an annular inclined portion formed integrally with an elastic body such as rubber.

This configuration has the following effects.
(1) The protruding portion protrudes from the base portion toward the center side of the column at least larger than the width of the gap between the column and the pile, and the inner diameter of the annular protruding portion is at least smaller than the outer diameter of the pile, Since the projecting part is made of an elastic body such as rubber, the pile inserted inside the support column abuts against the surface of the sloped part against the pile and presses the inclined part, and the projecting part moves in the pile insertion direction accordingly. Since it is pressed and elastically deformed, it is possible to smoothly insert the pile into the support column while bringing the surface of the inclined portion extending upward from the tip of the protruding portion into close contact with the outer wall of the pile. In addition, due to the elastic deformation of the projecting part, the surface of the sloped part around the piles can be moved over the entire circumference of the outer wall of the pile following the impact of inserting the pile or placing the pile on the seabed. Since it can be adhered, it is possible to prevent deterioration of the sealing property and reliably prevent the filler from leaking.
(2) Since the inclined portion extends upward from the tip of the projecting portion and the inclined portion is formed of an elastic body such as rubber, when the pile is inserted into the column, the surface of the inclined portion per pile And the inclined part is pressed and deformed in the direction of the pile insertion and urges the inclined part toward the outer wall of the pile. It can make it contact | adhere and can prevent that a clearance gap produces between the per-pile surface of an inclination part and the outer wall of a pile.
(3) Since the inclined portion extends upward from the tip of the protruding portion, a groove portion having a substantially concave cross section is formed by the base portion, the protruding portion, and the inclined portion, and the gap portion between the column and the pile inserted into the column When the filler is injected into the groove, the filler accumulates inside the groove portion having a substantially concave cross section, and the inclined portion is pressed against the outer wall of the pile by the pressure of the filler. It is possible to prevent the filler from leaking through the gap. Furthermore, even when the length of the support is long and the amount of filler to be filled is large, the pressing force applied to the inclined portion increases with the amount of filling, so even in a large substructure, the filler Can be surely prevented, and all fillers can be injected by one injection operation, so that the workability is excellent.
(4) Since the inclined portion is formed to be inclined toward the inner wall side of the support column, when the pile is inserted into the support column, the inclined portion is not dragged over by the pile and turned upside down or twisted. It can be inserted smoothly while sliding along the surface of the pile.

Here, the base portion, the protruding portion, and the inclined portion are integrally formed of an elastic body such as rubber or elastic synthetic resin. As the material of the elastic body, chloroprene rubber having high tensile strength and excellent weather resistance is used. In addition, the base part is a rubber that forms a base part by using a fixing member such as a bolt or nut, or by using an adhesive, or by baking, or by using a fixing member such as a bolt or nut on the inner wall of the pillar or the inner wall of a mounting member attached to the inner wall of the pillar. It is preferably firmly fixed by vulcanization adhesion or the like that is adhered at the same time as molding. When the base part is fixed by bonding by baking or vulcanization, a fixing member such as a bolt and nut is not required, so that the protruding part and the inclined part do not come into contact with the bolt or the like and are not damaged. Since it is not necessary to drill a bolt insertion hole or the like, it is possible to prevent the strength of the column from being lowered. Furthermore, it is preferable that the base portion is formed in a cylindrical shape having a predetermined width in the length direction of the support column, and is firmly fixed by increasing the adhesion area with the support or the inner wall of the mounting member.
Moreover, it is preferable to form the base part of the protrusion part which is a junction part of a protrusion part and a base part thicker than the front-end | tip part. When the pile is inserted into the support column, a large bending stress is applied to the base of the protrusion due to the pressing force of the pile, so by forming it thick, the base of the protrusion may be deformed so that it does not break or return Can be prevented and durability can be improved.

  The seal for preventing leakage of filler according to claim 2 of the present invention is the seal according to claim 1, wherein the base portion is directed to a lower portion of the base portion of the protruding portion, and the thickness of the base portion is directed downward. It has the structure provided with the thin part which became thin.

With this configuration, in addition to the operation of the first aspect, the following operation is provided.
(1) When a pile is inserted into the column and the protrusion is deformed accordingly, a thin portion is formed below the base of the protrusion of the base, so that the deformation of the protrusion is prevented by the base. The protrusion can be easily deformed to the inner wall side of the column, and the pile can be smoothly inserted into the column without being caught by the protrusion.

  The seal for preventing leakage of filler according to claim 3 of the present invention is the seal according to claim 1 or 2, wherein the protruding portion protrudes downward at an angle of 50 ° to 70 ° with respect to the base portion. It has an installed configuration.

With this configuration, in addition to the operation of the first or second aspect, the following operation is provided.
(1) Since the protruding portion protrudes downward at an angle of 50 ° to 70 ° with respect to the base portion, the surface of the inclined portion per pile can be brought into close contact with the pile with an appropriate pressing force, and the pile It is possible to prevent an excessive pressing force from being applied to the protruding portion when inserting the rod into the support column.

  Here, it is preferable that the protruding portion protrudes downward with respect to the base portion at an angle of 50 ° to 70 °, preferably an angle of 55 ° to 65 °. As the inclination of the projecting portion with respect to the base portion becomes smaller than 55 °, the projecting portion becomes too downward, and the elastic force in the direction of the outer wall of the pile becomes smaller, and the surface of the inclined portion is closely attached to the outer wall of the pile. This is not preferable because it cannot be performed, and the tendency becomes more prominent as the angle becomes smaller than 50 °. As the inclination of the protrusion with respect to the base becomes greater than 65 °, excessive pressure is applied to the protrusion when the pile is inserted into the column, cracks or crazes are formed at the base of the protrusion, and the pile is caught. It is not preferable because it cannot be inserted easily, and it is not preferable because the tendency becomes more prominent as it becomes larger than 70 °.

  According to a fourth aspect of the present invention, there is provided a seal for preventing leakage of filler according to any one of the first to third aspects, wherein the tip of the protruding portion is formed in a sharp shape. is doing.

With this configuration, in addition to the operation of any one of claims 1 to 3, the following operation is provided.
(1) Since the tip of the protruding portion is formed in a sharp shape, when the pile is inserted into the support column, the surface side of the tip of the protruding portion that is formed in a sharp shape is reliably brought into contact with the pile. It is possible to make the surface per pile close to the outer wall of the pile.

  The seal for preventing leakage of filler according to claim 5 of the present invention is the seal according to any one of claims 1 to 4, wherein the surface of the inclined portion per pile is in the insertion direction of the pile. The structure is formed at an angle of 15 ° to 45 °.

With this configuration, in addition to the operation of any one of claims 1 to 4, the following operation is provided.
(1) Since the surface per pile of the inclined portion is formed at an angle of 15 ° to 45 ° with respect to the insertion direction of the pile, the tip of the inclined portion is caught on the pile when the pile is inserted into the column. It is possible to prevent the filler from leaking without failing to turn over or twist, and to prevent the pile from being caught by the inclined portion, and to smoothly insert the pile into the support column.

  Here, the inclined portion is formed with a smooth flat surface per pile on the surface on the pile side, and the inclination angle of the surface per pile is 15 ° to 45 °, preferably 20 ° to 35 with respect to the pile insertion direction. It is formed to be °. As the angle of the surface per pile becomes smaller than 20 °, when the pile is inserted into the column, the tip of the inclined portion is caught on the pile and turned over or drowned, so that a gap is easily generated between the inclined portion and the pile. This is not preferable because leakage of the filler tends to occur, and it is not preferable because the tendency becomes more prominent as it becomes smaller than 15 °. As the angle of the surface per pile becomes larger than 35 °, it is not preferable because the pile gets caught on the inclined part when it is inserted into the support column, and it becomes difficult to insert it. As the angle becomes larger than 45 °, the tendency becomes more prominent. Less preferred.

  The seal for preventing leakage of filler according to claim 6 of the present invention is the seal according to any one of claims 1 to 5, wherein the inclined portion is most eccentric from the center of the column. When inserted into the column at a position, the tip of the inclined portion is configured to be positioned closer to the column than the outer wall of the pile closest to the column.

With this configuration, in addition to the operation of any one of claims 1 to 5, the following operation is provided.
(1) When the pile is inserted into the column at the most eccentric position from the center of the column, the tip of the inclined part is located on the column side from the outer wall of the pile closest to the column, so the pile was inserted into the column When the pile is inserted smoothly along the inclined part, the pile does not get caught or caught in the tip of the inclined part, and the inclined part can be prevented from turning over or drowning with the insertion of the pile. it can.

  The seal for preventing leakage of filler according to claim 7 of the present invention is the cylindrical seal according to any one of claims 1 to 6, wherein the base portion is fixed along the inner wall. And an attachment member fixed on the outer wall along the inner wall of the support column.

With this configuration, in addition to the operation of any one of claims 1 to 6, the following operation is provided.
(1) Since the cylindrical mounting member is provided, it is only necessary to fix the base portion to the mounting member in advance and attach the mounting member to the inner wall of the column by welding or the like on the site. The construction workability at the site is excellent without performing complicated work such as attaching by baking adhesion along the surface.

  Here, the base portion is fixed to the inner wall of the mounting member by baking adhesion or the like. When vulcanization molding is performed in the mold, the mounting member can be set in the mold in advance, and the base portion can be vulcanized and bonded to the mounting member at the same time as the vulcanization molding.

  In the construction method of the foundation structure according to claim 8 of the present invention, the base portion of the filler leakage prevention seal according to any one of claims 1 to 7 is disposed along the inner wall of the mounting member. A fixing step for fixing the base portion to be fixed; a fixing member fixing step for fixing the mounting member along the inner wall of the support pillar of the foundation structure by means of fixing such as welding; and submerging the foundation structure in the sea An installation step of installing the pile into the support column, a pile driving step of inserting the pile into the seabed ground, and a filler injection step of injecting a filler into a gap between the pile and the support column And a configuration provided with.

This configuration has the following effects.
(1) Since the base portion of the seal for preventing leakage of the filler material is disposed and fixed in advance on the mounting member, and the mounting member only needs to be fixed to the support column of the foundation structure by fixing means such as welding on the site, It is excellent in workability without performing complicated work such as attaching the seal for preventing leakage of the filler to the support by baking and bonding.
(2) When the pile is inserted into the support column, the protruding portion of the filler leakage prevention seal is pressed and elastically deformed by the inserted pile in the pile insertion direction. The piles can be smoothly inserted and placed while being in close contact.
(3) Since the projecting portion is elastically deformed, the surface of the inclined portion around the pile follows the entire circumference of the outer wall of the pile against the impact generated in the pile placing process, thereby preventing deterioration of the sealing performance. In addition, leakage of the injected filler can be reliably prevented, and the construction work can be performed smoothly and quickly without polluting the sea.
(4) Before installing the foundation structure on the submarine ground, a seal for preventing leakage of the filler is attached to the inner wall of the pillar of the foundation structure in advance. After installing the foundation structure on the submarine ground and driving the pile In addition, it is not necessary to perform the work of sealing the lower end portion of the support in the sea, and it is possible to reduce the number of workers and the man-hours and is excellent in labor saving.

  Here, grout materials such as cement paste and cement milk (ρ = 2 to 2.5) are used as the filler. In the filler injection step, a filler inlet is formed in the wall of the column, a filler injection pipe is connected to the filler inlet, and the filler is inserted into the gap between the column and the pile using an injection pump or the like. Is injected.

  The construction method for a foundation structure according to claim 9 of the present invention is such that the base portion of the seal for preventing leakage of filler according to any one of claims 1 to 7 is provided along the inner wall of the column of the foundation structure. A seal disposition fixing step for disposing and fixing, a setting step for sinking the foundation structure in the sea and setting it on the seabed ground, and a pile for inserting the pile into the strut and placing the pile on the seabed ground It has the structure provided with the placement process and the filler injection | pouring process which inject | pours a filler into the clearance gap between the said pile and the said support | pillar.

This configuration has the following effects.
(1) When the pile is inserted into the column, the protruding portion of the filler leakage prevention seal is pressed in the pile insertion direction by the inserted pile and is elastically deformed. The piles can be smoothly inserted and placed while being in close contact.
(2) Since the projecting part is elastically deformed, the surface of the sloped part of the pile follows the entire circumference of the outer wall of the pile even against the impact generated in the pile placing process, thereby preventing deterioration of the sealing performance. In addition, leakage of the injected filler can be reliably prevented, and the construction work can be performed smoothly and quickly without polluting the sea.
(3) Before installing the foundation structure on the submarine ground, the filler leakage prevention seal is placed and fixed on the inner wall of the foundation structure pillar in advance. After the installation, it is not necessary to perform the work of sealing the lower end of the support in the sea, and it is possible to reduce the number of workers and the work man-hours, and is excellent in labor saving.

  Here, in the seal disposition fixing step, the base portion of the filler leakage prevention seal is fixed to the inner wall of the support by baking or the like.

  A construction method for a substructure according to claim 10 of the present invention is the invention according to claim 8 or 9, further comprising a lubricant application step of applying a lubricant to the inclined portion of the seal for preventing leakage of filler. It has a configuration.

With this configuration, in addition to the operation of the eighth or ninth aspect, the following operation is provided.
(1) The friction between the inclined surface of the inclined portion of the seal for preventing leakage of the filler and the outer wall of the pile can be reduced, and the pile can be smoothly inserted into the column and driven into the seabed ground.

  Here, grease or the like is used as the lubricant.

As described above, according to the present invention, the following advantageous effects can be obtained.
According to the invention of claim 1,
(1) The annular protrusion can be firmly fixed along the inner wall of the column through the base, and the inclined portion of the column can be fixed even if the pile is slightly decentered from the center of the column during the work of inserting the pile into the column. Since it does not come off the inner wall, it is possible to provide a filler leakage prevention seal that can reliably prevent the filler leakage.
(2) Since the pile inserted inside the column abuts against the surface of the inclined portion against the pile and presses the inclined portion, the protruding portion is pressed in the insertion direction of the pile and elastically deformed accordingly. Workability that allows the pile to be smoothly inserted into the support column and the work to insert the pile into the support column can be smoothly performed while the peripheries of the inclined portion extending upward are in close contact with the outer wall of the pile. It is possible to provide a seal for preventing leakage of filler excellent in the above.
(3) Due to the elastic deformation of the projecting part, the surface of the sloped part of the inclined part over the entire circumference of the outer wall of the pile following the impact of inserting the pile or placing the pile on the seabed Therefore, it is possible to provide a seal for preventing leakage of a filler that is excellent in sealability and that can prevent a decrease in sealability and reliably prevent leakage of the filler.
(4) Since the inclined portion extends upward from the tip of the protruding portion and the inclined portion is formed of an elastic body such as rubber, the surface of the inclined portion per pile can be brought into close contact with the outer wall of the pile. In addition, it is possible to provide a filler leakage prevention seal that can prevent a gap from being generated between the surface of the inclined portion around the pile and the outer wall of the pile, and can reliably prevent the leakage of the filler.
(5) Even if the length of the column is long and the amount of filler to be filled is large, the pressing force applied to the inclined portion also increases with the amount of filling, so even large foundation structures are filled. It is possible to provide a seal for preventing leakage of a filler that can reliably prevent leakage of the material and that is excellent in workability and that can inject all of the filler in a single injection operation.
(6) Since the inclined portion is formed to be inclined toward the inner wall side of the support column, the inclined portion is not dragged over by the pile when inserted into the support column, and the pile is not turned over or turned. Thus, it is possible to provide a seal for preventing leakage of the filler that is excellent in workability and can be smoothly inserted while sliding along the surface of the pile.

According to invention of Claim 2, in addition to the effect of Claim 1,
(1) When a pile is inserted into the column and the protrusion is deformed accordingly, a thin portion is formed below the base of the protrusion of the base, so that the deformation of the protrusion is prevented by the base. Since the projecting part can be smoothly deformed to the column side, the pile can be smoothly inserted into the column even when the interval between the column inner wall and the outer wall of the pile is narrow. An excellent filler leakage prevention seal can be provided.

According to invention of Claim 3, in addition to the effect of Claim 1 or 2,
(1) Since the protruding portion protrudes downward at an angle of 50 ° to 70 ° with respect to the base portion, the surface of the inclined portion per pile can be brought into close contact with the pile with an appropriate pressing force, and the pile It is possible to prevent an excessive pressing force from being applied to the protruding portion when inserting the rod into the support column, and it is possible to provide a filler leakage prevention seal that has high adhesion to the pile and excellent mechanical strength.

According to invention of Claim 4, in addition to the effect of any one of Claims 1 to 3,
(1) Since the tip of the protruding portion is formed in a sharp shape, when the pile is inserted into the support column, the surface side of the tip of the protruding portion that is formed in a sharp shape is reliably brought into contact with the pile. Therefore, it is possible to provide a seal for preventing leakage of a filler with high adhesion to a pile, in which a surface per pile can be strongly adhered to the outer wall of the pile.

According to the invention of claim 5, in addition to the effect of any one of claims 1 to 4,
(1) Since the surface per pile of the inclined portion is formed at an angle of 15 ° to 45 ° with respect to the insertion direction of the pile, the inclined portion is wound on the pile side when the pile is inserted into the column, Providing a seal for filling material leakage prevention that prevents the tip of the inclined part from being caught and flips over or falls, prevents the filling material from leaking, and allows the pile to be smoothly inserted into the column. can do.

According to invention of Claim 6, in addition to the effect of any one of Claims 1 to 5,
(1) When the pile is inserted into the column at the most eccentric position from the center of the column, the tip of the inclined part is located on the column side from the outer wall of the pile closest to the column, so the pile was inserted into the column When the pile is inserted smoothly along the inclined part, the pile does not get caught or caught in the tip of the inclined part, and the inclined part can be prevented from turning over or drowning with the insertion of the pile. It is possible to provide a seal for preventing leakage of filler that can prevent the filler from leaking from the gap between the surface of the inclined portion and the outer wall of the pile.

According to the invention of claim 7, in addition to the effect of any one of claims 1 to 6,
(1) Since the cylindrical mounting member is provided, it is only necessary to fix the base portion to the mounting member in advance and attach the mounting member to the inner wall of the column by welding or the like on the site. In addition, it is possible to provide a seal for preventing leakage of a filler that is excellent in construction workability on site without performing complicated work such as attaching by baking adhesion.

According to the invention described in claim 8,
(1) Since the base portion of the seal for preventing leakage of the filler material is disposed and fixed in advance on the mounting member, and the mounting member only needs to be fixed to the support column of the foundation structure by fixing means such as welding on the site, The construction method of the foundation structure excellent in workability | operativity which does not perform complicated work, such as attaching the seal | sticker for leakage prevention of a filler to a support | pillar by baking adhesion etc., can be provided.
(2) When the pile is inserted into the support column, the protruding portion of the filler leakage prevention seal is pressed and elastically deformed by the inserted pile in the pile insertion direction. The construction method of the foundation structure excellent in workability | operativity which can insert and drive a pile smoothly, making it closely_contact | adhere can be provided.
(3) Since the projecting portion is elastically deformed, the surface of the inclined portion around the pile follows the entire circumference of the outer wall of the pile against the impact generated in the pile placing process, thereby preventing deterioration of the sealing performance. And the construction method of the foundation structure excellent in the sealing performance which can prevent the leakage of the injected filler reliably can be provided.
(4) Since the filler can be surely prevented from leaking, it is possible to provide a construction method for a foundation structure excellent in workability capable of performing construction work smoothly and quickly without polluting the sea.
(5) Before installing the foundation structure on the submarine ground, a seal for preventing leakage of filler is attached to the inner wall of the pillar of the foundation structure in advance. After installing the foundation structure on the submarine ground and driving the pile In addition, it is not necessary to perform the work of sealing the lower end portion of the support in the sea, and it is possible to provide a construction method for a foundation structure excellent in labor saving that can reduce the number of workers and work man-hours.

According to the invention of claim 9,
(1) When the pile is inserted into the column, the protruding portion of the filler leakage prevention seal is pressed in the pile insertion direction by the inserted pile and is elastically deformed. The construction method of the foundation structure excellent in workability | operativity which can insert and drive a pile smoothly, making it closely_contact | adhere can be provided.
(2) Since the projecting part is elastically deformed, the surface of the sloped part of the pile follows the entire circumference of the outer wall of the pile even against the impact generated in the pile placing process, thereby preventing deterioration of the sealing performance. And the construction method of the foundation structure excellent in the sealing performance which can prevent the leakage of the injected filler reliably can be provided.
(3) Since it is possible to reliably prevent the filler from leaking, it is possible to provide a construction method of a foundation structure excellent in workability that can perform construction work smoothly and quickly without polluting the sea.
(4) Before installing the foundation structure on the submarine ground, a seal for preventing leakage of the filler is attached to the inner wall of the pillar of the foundation structure in advance. After installing the foundation structure on the submarine ground and driving the pile In addition, it is not necessary to perform the work of sealing the lower end portion of the support in the sea, and it is possible to provide a construction method for a foundation structure excellent in labor saving that can reduce the number of workers and work man-hours.

According to invention of Claim 10, in addition to the effect of Claim 8 or 9,
(1) A construction method for a substructure that can reduce friction between the pile contact surface of the inclined portion of the seal for preventing leakage of filler and the outer wall of the pile, and can smoothly insert the pile into the strut and drive it into the seabed ground. Can be provided.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
(Embodiment 1)
FIG. 1A is a perspective view of a partially broken main part of the filler leakage prevention seal according to the first embodiment, and FIG. 1B is a principal part showing a structure to which the filler leakage prevention seal is attached. It is a perspective view.
In FIG. 1, reference numeral 1 denotes a filler leakage prevention seal according to the first embodiment, 2 denotes a cylindrical attachment member for attaching the filler leakage prevention seal 1 to the inside of the tubular column Y of the foundation structure X, 3 is a cylindrical base portion formed of an elastic body such as rubber and disposed along the inner wall surface of the mounting member 2, and 4 is a column Y formed integrally with an elastic body such as rubber inside the base portion 3. An annular projecting portion 5 projecting toward the center side of the projecting portion and inclining downward is extended from the acute angle portion 4a at the tip of the projecting portion 4 to the base portion 3 side by a predetermined angle and extended upward. An annular inclined portion formed integrally with an elastic body such as the like, and formed so that the thickness becomes thinner as it goes to the tip, 6 is a surface per pile made of a smooth surface on the inner surface of the inclined portion 5, and 7 is Surrounded by the base part 3, the projecting part 4 and the inclined part 5 A filler receiving portion formed in a substantially concave groove shape.
The foundation structure X is a structure that is installed on the submarine ground as the foundation for offshore structures such as bridges and breakwaters. The foundation structure X is assembled in the shape of a tower using the tubular support Y as a vertical member and the connecting member Z as a horizontal member. Yes.

The filler leakage prevention seal 1 is fixed to the inner peripheral wall surface of the attachment member 2 by baking adhesion or the like, and the attachment member 2 to which the filler leakage prevention seal 1 is fixed is the lower end inside the column Y of the foundation structure X. It is attached to the part by welding. The foundation structure X to which the filler leakage prevention seal 1 is attached via the attachment member 2 is submerged in the sea and installed on the seabed ground. Furthermore, in order to fix the foundation structure X on the seabed ground, a pile such as a steel pipe pile is inserted into the tubular support pillar Y and is placed on the seabed ground. The filler leakage prevention seal 1 is disposed inside the column Y into which the pile is inserted.
The base part 3, the protrusion part 4, and the inclination part 5 are integrally formed by elastic bodies, such as chloroprene rubber. In addition, the base part 3, the protrusion part 4, and the inclination part 5 can be integrally molded using a split mold. The base 3 is bonded and firmly fixed to the inner wall of the cylindrical mounting member 2 by baking.

FIG. 2 is a cross-sectional view of a main part of the filler leakage prevention seal in the first embodiment.
In FIG. 2, K is a pile, 4a is an acute angle part of the front-end | tip of the protrusion part 4, and the inclined part 5 is extended upwards, and is formed in the acute shape. 5a is a tip portion at the upper end of the inclined portion 5, 8 is a welded portion formed for welding and attaching the attachment member 2 to the inner wall of the column Y, and 9 is for inserting the pile K at the approximate center inside the column Y. An annular spacer member 9 a attached to the inner wall surface of the column Y above the filler leakage prevention seal 1 is an inclined surface formed inside the upper end portion of the spacer member 9. A shows the position of the outer wall of the pile K when the center of the pillar Y and the center of the pile K coincide, and B shows the position of the outer wall of the pile K when the center of the pile K is most eccentric to the left side in FIG. C indicates the position of the outer wall of the pile K when the center of the pile K is most eccentric to the right side in FIG.

As shown in FIG. 2, when the pile K is inserted into the support Y from the upper end, the pile K is first inserted into the spacer member 9 attached to the inner wall surface near the upper end of the support Y. At this time, since the tip of the pile K slides along the inclined portion 9a of the spacer member 9, it can be inserted with its center aligned with the approximate center of the column Y.
The inclined portion 5 is formed with a predetermined length and an inclined angle α from the acute angle portion 4a of the projecting portion 4, and the distal end portion 5a is located closer to the base portion 3 than the position B of the outer wall of the pile K closest to the column Y. It is formed as follows. Thereby, even when the pile K is inserted into the column Y at the position B of the outer wall where the pile K is most eccentric from the center of the column Y, the pile K is inclined when the pile K is inserted into the column Y. It is inserted smoothly along the surface 6 per 5 piles, and it is possible to prevent the pile K from being caught on the tip portion 5 a of the inclined portion 5.
The protruding portion 4 protrudes toward the center side of the column Y larger than the width of the gap between the column Y and the pile K, and the inner diameter of the annular protruding portion 4 is at least smaller than the outer diameter of the pile K. Furthermore, since the protruding portion 4 is formed such that the acute angle portion 4a is located on the center side of the column Y from the position C where the center of the pile K is most eccentric from the center of the column Y, the pile K is formed on the outer wall. Even if it is a case where it inserts in the support | pillar Y in the position C, the acute angle part 4a contact | abuts to the outer wall of the pile K, and it makes the surface 6 per pile of the inclination part 5 contact | adhere over the perimeter of the outer wall of the pile K. It is possible to reliably prevent the leakage of the filler. Since the acute angle portion 4a of the protruding portion 4 is formed in a sharp shape, even when the pile is eccentric from the center of the support column Y when the pile is inserted into the support column Y, the acute angle formed in a sharp shape. The surface 6 side per pile of the part 4a can be reliably brought into contact with the pile K, and the surface 6 per pile can be firmly adhered to the outer wall of the pile K.
Moreover, the protrusion part 4 protrudes downward so that the inclination | tilt angle (alpha) with respect to the base part 3 may be set to 50 degrees-70 degrees. As the inclination angle α of the protruding portion 4 with respect to the base portion 3 becomes smaller than 50 °, it becomes difficult to make the protruding length of the protruding portion 4 from the base portion 3 larger than the width of the gap portion between the column Y and the pile K. At the same time, it becomes difficult to form the surface 6 per pile of the inclined portion 5 so as to be inclined at a suitable angle with respect to the insertion direction of the pile K, and the surface 6 per pile cannot be strongly adhered to the outer wall of the pile K. Therefore, it is not preferable. As the inclination angle α of the protruding portion 4 with respect to the base portion 3 becomes larger than 70 °, an excessive pressing force is applied to the protruding portion 4 when the pile K is inserted into the column Y, and the base portion of the protruding portion 4 is broken. It is not preferable.
The surface 6 per pile of the inclined portion 5 is formed so that the inclination angle β is 15 ° to 45 ° with respect to the insertion direction of the pile K. As the inclination angle β of the surface per pile becomes smaller than 15 °, when the pile K is inserted into the column Y, the tip of the inclined portion 5 is caught on the pile K and turned over or drowned. As the gap becomes larger than 45 °, the pile K tends to be caught by the inclined portion 5 and becomes difficult to insert as it becomes larger than 45 °. .
In addition, as shown in FIG. 2, the inclined portion 5 is formed such that the tip portion 5 a at the upper end is the same height as the upper end portion of the base portion 3. Thereby, the base part 3, the protrusion part 4, and the inclination part 5 are easy to integrally mold with a metal mold | die, and are suitable for mass production, and are excellent in productivity.

Regarding the filler leakage prevention seal 1 according to the first embodiment configured as described above, the construction method of the substructure using the sealant will be described below with reference to FIGS.
FIG. 3 is a perspective view of a partially broken main part of the filler leakage prevention seal showing a state in which the pile is inserted into the support column, and FIG. 4 is an essential part of the filler leakage prevention seal showing a state in which the pile is inserted into the support column. It is sectional drawing.
In the figure, 10 is a filler injection port opened at the top of the seal 1 for preventing leakage of the filler on the wall surface of the tubular column Y, 11 is a filler injection tube connected to the filler injection port 10, and 12 is a column Y And a filler such as concrete injected into the gap between the pile K via the filler injection pipe 11 and the filler injection port 10.
First, the base portion 3 of the filler leakage prevention seal 1 is fixed to the inner peripheral wall surface of the mounting member 2 by baking adhesion or the like (base portion arrangement fixing step). The attachment member 2 to which the filler leakage prevention seal 1 is fixed is attached to the lower end portion inside the column Y of the foundation structure X by welding (attachment member fixing step). At this time, the base portion 3 of the filler leakage prevention seal 1 may be disposed and fixed directly on the inner peripheral wall surface of the column Y by baking adhesion or the like without using the attachment member 2 (seal arrangement fixing step). .
The foundation structure X to which the filler leakage prevention seal 1 is attached via the attachment member 2 is submerged in the sea and installed on the seabed ground (installation process). Furthermore, in order to fix the foundation structure X on the seabed ground, a pile K such as a steel pipe pile is inserted into a tubular support Y and placed on the seabed ground (pile placing process). In the pile driving step, as shown in FIG. 3, the pile K inserted into the support Y from the upper end of the support Y is inserted into the approximate center of the support Y by the spacer member 9 shown in FIG. When the pile K is further inserted downward, the pile K abuts against the surface 6 around the pile of the inclined portion 5 and presses the inclined portion 5. Accordingly, the protruding portion 4 is pressed in the insertion direction of the pile K and elastically deforms, and the inclined portion 5 is urged toward the outer wall of the pile K. Therefore, the surface 6 around the pile of the inclined portion 5 is in close contact with the outer wall of the pile K. To do. When the pile K is inserted to the lower end of the column Y, it is driven into the seabed ground (not shown). At this time, a lubricant such as grease can be applied to the surface 6 around the pile of the inclined portion 5 in contact with the pile K (lubricant application step). Thereby, the friction with the pile K and the surface 6 per pile can be reduced, and the pile K can be inserted smoothly and can be driven into the seabed ground.
When the pile K is driven into the seabed ground for a predetermined length, as shown in FIG. 4, an injection pump (not shown) or the like from the filler injection pipe 11 and the filler injection port 10 is inserted into the gap between the column Y and the pile K. The filler 12 is injected using (filler injection step). The injected filler 12 first accumulates in the filler receiver 7 and further accumulates upward. In the filler receiving portion 7, the inclined portion 5 is pressed against the outer wall of the pile K by the pressure of the injected filler 12. This pressing force gradually increases depending on the filling amount of the injected filler 12. Thereby, since the surface 6 per pile of the inclined part 5 closely_contact | adheres to the pile K, it can prevent that the filler 12 leaks from the clearance gap between the surface 6 per pile and the outer wall of the pile K. FIG. After the filler 12 is filled up to the vicinity of the upper end of the support Y, the support 12 is solidified to firmly fix the support Y to the pile K placed on the seabed ground. It can be fixed firmly and installed.
In the first embodiment, the base portion 3 of the filler leakage prevention seal 1 is attached to the support column Y via the attachment member 2, but the present invention is not limited to this, and the base portion 3 is attached to the support column Y. It may be arranged and fixed directly on the inner wall by baking or bonding. Thereby, construction work man-hours can be reduced significantly. In addition, since the support | pillar Y is large, even if it is the field, a baking adhesion | attachment operation | work can be performed without being influenced by rain wind.

As described above, since the construction method for the filler leakage prevention seal 1 and the substructure in the first embodiment is configured, it has the following effects.
(1) Since the base part 3, the projecting part 4 and the inclined part 5 are integrally formed, the base part 3 is baked and bonded to the inner wall of the mounting member 2, and the mounting member 2 is welded to the inner wall of the column Y. The protruding portion 4 and the inclined portion 5 are firmly fixed along the inner wall of the column Y via the mounting member 2 and the base portion 3, and the protruding portion 4 is excessively pressed against the pile K when the pile K is inserted into the column Y. Even if it is done, it does not come off from the attachment member 2, and the leakage of the filler can be reliably prevented.
(2) Since the protruding portion 4 protrudes downward from the base portion 3 toward the center side of the column Y, and the protruding portion 4 is formed of an elastic body such as rubber, it is inserted into the column K. Since the pile K is in contact with the surface 6 around the pile of the inclined portion 5 and presses the inclined portion 5, the protruding portion 4 is pressed in the insertion direction of the pile K and elastically deforms accordingly. Can be inserted smoothly. Moreover, since the protrusion part 4 is pressed in the insertion direction of the pile K and elastically deforms, the inclined part 5 is urged toward the outer wall of the pile K. Therefore, the surface 6 per pile of the inclined part 5 acts on the outer wall of the pile K. It adheres and can prevent that a clearance gap arises between the surface 6 per pile and the outer wall of the pile K. FIG.
(3) Since the inclined portion 5 extends upward from the tip of the protruding portion 4, a groove portion having a substantially concave cross section is formed by the base portion 3, the protruding portion 4, and the inclined portion 5. 7 is formed. When the filler 12 is injected into the gap between the column Y and the pile K, the filler 12 accumulates in the filler receiving portion 7 and the inclined portion 5 is pressed against the outer wall of the pile K by the pressure of the filler 12. The surface 6 per pile strongly adheres to the outer wall of the pile K, and the filler 12 can be prevented from leaking from the gap between the surface 6 per pile and the outer wall of the pile K. Further, even if the foundation structure X is large and the length of the support Y is long and the amount of the filler 12 to be filled is large, the pressing force applied to the inclined portion 5 increases with the filling amount. Even in the large-sized substructure X, the leakage of the filler 12 can be reliably prevented, and all the fillers 12 can be injected by a single injection operation, and the workability is excellent.
(4) Since the surface 6 per pile of the inclined portion 5 is formed to be inclined toward the inner wall side of the column Y, and the surface 6 per pile is formed in a smooth flat shape, the pile K is inserted into the column Y. In this case, the inclined portion 5 is not dragged by the pile K and turned over or turned over, and it is possible to prevent a gap from being generated between the surface 6 around the pile and the outer wall of the pile K. It can be smoothly inserted along the surface 6 per pile of the inclined portion 5.
(5) Since the protruding portion 4 is projected downward with an inclination angle α of 50 ° to 70 ° with respect to the base portion 3, the surface 6 per pile of the inclined portion 5 is appropriately pressed against the pile K. While being able to make it adhere by pressure, when inserting pile K into the support | pillar Y, it can prevent that excessive pressing force is applied to the protrusion part 4, and the protrusion part 4 bends or breaks in the base. Can be prevented. Moreover, since the acute angle part 4a of the protrusion part 4 is formed in the acute shape, when the pile K is inserted in the support | pillar Y, the surface 6 side per pile of the acute angle part 4a of the protrusion part 4 formed in the acute shape is arranged. The pile K can be reliably brought into contact with each other, the surface 6 per pile can be tightly adhered to the outer wall of the pile K, and the leakage of the filler 12 can be reliably prevented.
(6) Since the surface 6 per pile of the inclined portion 5 is formed with an inclination angle β of 15 ° to 45 ° with respect to the insertion direction of the pile K, when the pile K is inserted into the column Y, the pile The tip 5a of the inclined portion 5 is caught by K and does not turn over or bend, and the leakage of the filler 12 can be reliably prevented, and the pile K is prevented from being caught by the inclined portion 5, and the pile K Can be smoothly inserted into the column Y.
(7) The base portion 3 of the seal 1 for preventing filler leakage is disposed and fixed in advance in the mounting member 2 in the base portion mounting and fixing step, and the mounting member 2 is fixed to the foundation structure X in the mounting member fixing step in the field. Since it is only necessary to fix to the support column Y by fixing means such as welding, the workability is excellent without performing a complicated operation such as attaching the filler leakage prevention seal 1 to the support column Y by baking or bonding.
(8) Before the foundation structure X is installed on the seabed ground, the filler leakage prevention seal 1 is attached to the inner wall of the column Y of the foundation structure X via the attachment member 2 in advance. After installing the pile K on the ground and placing the pile K, it is not necessary to perform the work of sealing the lower end portion of the support Y in the sea.

(Embodiment 2)
FIG. 5 is a cross-sectional view of the main part of the seal for preventing leakage of filler in the second embodiment, and FIG. 6 is a cross-sectional view of the main part of the seal for preventing leak of filler, showing a state in which a pile is inserted into the support column.
In the figure, 2 is a mounting member, 8 is a welded part, 9 is a spacer member, 9a is an inclined surface, 10 is a filler injection port, 11 is a filler injection pipe, 12 is a filler, Y is a strut, and K is a pile. Since these are the same as those described in the first embodiment, the same reference numerals are given and description thereof is omitted. 21 is a seal for preventing leakage of filler in the second embodiment, 23 is a base portion, 24 is a protruding portion, 24a is an acute angle portion of the protruding portion 24, 25 is an inclined portion, 25a is a tip portion at the upper end of the inclined portion 25, 26 is a surface per pile, 27 is a filler receiving portion, 28 is a thin portion, and 29 is an upper end portion of the base.
The seal 21 for preventing leakage of filler in the second embodiment is different from the first embodiment in that the tip 25a of the inclined portion 25 extends to the vicinity of the inner wall of the column Y, and the base upper end 29 is the inclined portion 25. The thin portion 28 is formed so as not to come into contact with the distal end portion 25a, and the thin portion 28 is formed in the lower portion of the base portion of the projecting portion 24 of the base portion 23.

As shown in FIG. 5, in the second embodiment, when the gap between the support Y and the pile K inserted into the support Y is small, the thickness of the spacer member 30 is reduced accordingly. Even when the pile is inserted into the column Y at the position B of the outer wall that is most eccentric from the center of the column Y, the tip 25a of the inclined portion 25 extends to the vicinity of the inner wall of the column Y. The tip portion 25a of the inclined portion 25 can be positioned closer to the inner wall side of the support column Y than the outer wall B of the pile.
As shown in FIG. 5, in the second embodiment, when the gap between the support Y and the pile inserted into the support Y is small, the position of the outer wall, for example, the outer wall where the pile is most eccentric from the center of the support Y 6, the protrusion 24 is pressed by the pile K and greatly deformed toward the inner wall of the column Y as shown in FIG. 6. At this time, since the thin portion 28 whose thickness becomes thinner as it goes downward is formed at the lower portion of the base portion of the protruding portion 24 of the base portion 23, the deformation of the protruding portion 24 is not hindered by the base portion 23. The projecting portion 24 can be smoothly deformed to the support Y side.

As described above, since the filler leakage prevention seal 21 according to the second embodiment is configured, in addition to the effects of the first embodiment, the following actions are provided.
(1) Even when the pile K is inserted into the column Y at the position B of the outer wall that is most eccentric from the center of the column Y, the tip of the inclined portion 25 extends to the vicinity of the inner wall of the column Y. Since the tip 25a of the inclined portion 25 extends from the outer wall E of the pile to the inner wall side of the column Y, when the pile K is inserted into the column Y, the pile K follows the surface 26 per pile of the inclined portion 25. The pile K is not caught on the tip of the inclined portion 5 or is not caught in the inclined portion 5, and it is possible to prevent a gap from being generated between the pile contact surface 26 and the outer wall of the pile K. Moreover, the pile K can be smoothly inserted along the per-pile surface 26 of the inclined portion 25.
(2) When the pile is inserted into the column Y at the position B of the outer wall that is most eccentric from the center of the column Y, the protrusion 24 is pressed by the column K because the gap between the column Y and the column K is small. Even if it is greatly deformed to the Y side, the thin portion 28 is formed below the base of the projecting portion of the base portion 23. Therefore, the projecting portion 24 can escape to the column Y side, and the deformation of the projecting portion 24 is the base. The protrusion 24 can be smoothly deformed toward the support Y without being obstructed by the portion 23, and the pile K can be smoothly inserted into the support Y without being caught by the protrusion 24.

As described above, the present invention is mounted inside a tubular column of a foundation structure used as a foundation of a marine structure such as a bridge or a breakwater, and is filled in a gap between the column and a pile inserted into the column. The present invention relates to a seal for preventing leakage of a filler that prevents leakage of the filler. In particular, according to the present invention, it is possible to prevent the filler filled in the gap between the support pillar and the inserted pile from leaking into the sea from the lower end of the support pillar. Even when the filling amount of the filler into the gap portion increases, it is possible to provide a filler leakage prevention seal that can reliably prevent the leakage.
In addition, as described above, the present invention relates to a method for constructing a foundation structure that is submerged in the sea and installed on the seabed ground, and used as a foundation for a marine structure such as a bridge or a breakwater. In particular, according to the present invention, when the foundation structure is submerged in the sea and fixed on the seabed ground, the filler filled in the gap between the support column and the pile is prevented from leaking into the sea. Construction work can be performed smoothly and quickly without being contaminated, and since the seal for preventing leakage of the filler is attached to the inner wall of the support column, it is excellent in workability without performing complicated installation work on site, and the filler can be used. Since it can be completed by a single filling operation, the number of man-hours can be remarkably reduced and a construction method of a foundation structure excellent in workability can be provided.

(A) Perspective view of a partially broken main part of the seal for preventing leakage of filler in the first embodiment (b) Perspective view of relevant part showing a structure to which the seal for preventing leakage of filler is attached Sectional drawing of the principal part of the seal | sticker for a filler leakage prevention in Embodiment 1 Partially cutaway perspective view of a filler leakage prevention seal showing a state in which a pile is inserted into a column Cross-sectional view of the main part of the filler leakage prevention seal showing the state where the pile is inserted into the column Sectional drawing of the principal part of the seal for prevention of filler leakage in the second embodiment Cross-sectional view of the main part of the filler leakage prevention seal showing the state where the pile is inserted into the column Cross section of the main part of the steel pipe pile foundation seal of Patent Document 1

Explanation of symbols

1,21 Filler leakage prevention seal 2 Mounting member 3,23 Base portion 4,24 Protruding portion 4a, 24a Acute angle portion 5,25 Inclined portion 5a, 25a Inclined portion tip portion 6,26 Surface per pile 7,27 Filling Material receiving portion 8 Welded portion 9, 30 Spacer member 9a, 30a Inclined surface 10 Filler injection port 11 Filler injection tube 12 Filler 28 Thin portion 29 Base upper end portion 101 Steel pipe pile foundation seal 102 Strut contact portion 103 Inclined portion 104 Pile contact surface 105 Filler X Substructure Y Strut Z Connecting member K Pile

Claims (10)

A seal for preventing leakage of filler, which is attached to a gap between a tubular column and a pile inserted into the column, and prevents the filler filled in the gap from leaking from the lower end of the column. And
An annular base portion disposed and fixed along the inner wall of the column or along the inner wall of an attachment member attached to the inner wall of the column;
An annular protrusion protruding from the base with a protruding length larger than at least the width of the gap;
An annular inclined portion extending obliquely toward the base portion from the tip of the projecting portion upward,
A seal for preventing leakage of a filler, wherein the seal is integrally formed of an elastic body such as rubber.   The said base part is equipped with the thin part which became thin as the thickness of the said base part went below at the lower part of the base part of the said protrusion part, The filler leakage prevention for Claim 1 characterized by the above-mentioned. sticker.   3. The filler leakage prevention seal according to claim 1, wherein the protruding portion protrudes downward at an angle of 50 ° to 70 ° with respect to the base portion.   The seal for preventing leakage of a filler according to any one of claims 1 to 3, wherein a tip portion of the protruding portion is formed in a sharp shape.   The filling material according to any one of claims 1 to 4, wherein a surface of the inclined portion per pile is formed at an angle of 15 ° to 45 ° with respect to an insertion direction of the pile. Seal for leakage prevention.   When the inclined portion is inserted into the column at a position where the pile is most eccentric from the center of the column, the tip of the inclined unit is positioned closer to the column than the outer wall of the pile closest to the column. The seal for preventing leakage of a filler according to any one of claims 1 to 5, wherein the seal is formed so as to perform.   The inside of Claim 1 thru | or 6 provided with the attachment member fixed along the inner wall of the said support | pillar with the outer wall while being fixed to the said base part along the inner wall formed cylindrically. The filler leakage prevention seal according to any one of the preceding claims. A base portion disposition fixing step of disposing and fixing the base portion of the filler leakage prevention seal according to any one of claims 1 to 7 along the inner wall of the mounting member;
An attachment member fixing step of fixing the attachment member along the inner wall of the pillar of the foundation structure by a fixing means such as welding;
An installation process in which the foundation structure is submerged in the sea and installed on the submarine ground;
A pile driving step of inserting a pile into the column and driving the pile into the seabed;
A filler injection step of injecting a filler into the gap between the pile and the support;
The construction method of the foundation structure characterized by comprising. A seal disposition fixing step of disposing and fixing a base portion of the filler leakage prevention seal according to any one of claims 1 to 7 along an inner wall of a column of a foundation structure;
An installation process in which the foundation structure is submerged in the sea and installed on the submarine ground;
A pile driving step of inserting a pile into the column and driving the pile into the seabed;
A filler injection step of injecting a filler into the gap between the pile and the support;
The construction method of the foundation structure characterized by comprising. The construction method for a foundation structure according to claim 8 or 9, further comprising a lubricant application step of applying a lubricant to an inclined portion of the seal for preventing leakage of filler.