JP2013227772A - Water shielding joint structure of steel pipe sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water shielding joint structure of a steel pipe sheet pile, capable of preventing foreign matter contamination in a filler at a time of filling by making a dry state, and capable of securing the quality of a filler for a secondary water shielding layer filler.SOLUTION: A water shielding joint structure 10 of a steel pipe sheet pile shields water by filling, with the filler 16, a pocket 15 constituted of three top and outer joint members 12, 13, 13 for water shielding parts. A primary water shielding layer of the top of steel pipe sheet piles A, B is brought into a perfect water shielding state by bringing the lower end of a top elastic shielding member 18 into contact with a bottom cushioning water shielding member inserted from a groove 12a, turned, and attached. Thereby, The inside of the pocket 15 constituted of three top and outer joint members 12, 13, 13 for water shielding parts of the steel pipe sheet piles A, B is brought into a dry state, and thus the quality of a filler for a secondary water shielding layer can be secured.

Description

  The present invention relates to a watertight joint structure for steel pipe sheet piles, and in addition to a primary water shielding layer at a joint that connects the tops of adjacent steel pipe sheet piles, two pipes on the outside and a substantially U-shape such as a steel sheet pile or channel steel. The joints are attached in combination to form a substantially triangular pocket, and when the filler is filled in the pocket to form a secondary impermeable layer, the water shielding property can be improved and the quality of the filler can be ensured. It is what I did.

  Conventionally, in order to construct a revetment wall of a landfill, a breakwater, etc., a steel pipe sheet pile constructed by arranging a plurality of steel pipes in succession is used. There are various types of joints that connect adjacent steel pipes of steel pipe sheet piles. For example, PT type (pipe-T type) joints are used.

In this PT type joint, CT section steel is welded and fixed along one of the steel pipes at the top of the joint of the pair of adjacent steel pipes, and CT section steel is inserted into the other steel pipe. A pipe in which a groove is formed in the longitudinal direction is welded and fixed along the steel pipe, and CT section steel is accommodated in the pipe.
In this joint, a CT-shaped steel is fixed to the pipe and a primary water-impervious filler such as mortar is poured into the pipe to insulate between the steel pipes. A water shielding structure is provided to prevent the material from flowing out.

  As this water-blocking structure, for example, Patent Document 1 discloses a structure in which flexible leakage prevention plates are fixed to both sides of a flange portion of CT-shaped steel by a fixing tool via a holding fitting. Yes.

  Furthermore, in order to improve the water-imperviousness of the steel pipe sheet pile, for example, in Patent Document 2, in addition to the PT joint, a substantially triangular shape in which a U-shaped steel-shaped U-shaped joint portion is attached to two pipes. A steel pipe sheet pile water-proof joint structure has been developed that fills the pockets with a secondary water-impervious filler (see Fig. 1).

JP 2002-167751 A JP 2009-84949 A

  In such a steel pipe sheet pile water shielding joint structure, a secondary water shielding layer is provided in addition to the primary water shielding layer, and a filling material for secondary water shielding such as asphalt mastic is filled in a substantially triangular pocket. In the case of water shielding, there is a problem that the quality of the filling material is remarkably deteriorated due to the presence of foreign matter in the pocket before filling, and it is required to make the inside of the pocket dry.

  The present invention has been made in view of the above problems and demands of the prior art, and provides a watertight joint structure for a steel pipe joint that can create a dry state in a pocket and ensure the quality of a secondary watertight filler. It is something to try.

  In order to solve the above-mentioned problems, the steel pipe sheet pile water-impervious joint structure according to claim 1 of the present invention has a CT-shaped steel-like T-shaped joint member on one side in the vicinity of the top of the facing portion of the joint part of adjacent steel pipe sheet piles. Attached along the steel pipe sheet pile, and provided with a longitudinal groove into which the web part of the T-shaped joint member is inserted on the other of the opposing parts, and the T-shaped joint member alone or with the outer surface of the steel pipe sheet pile A joint member for the top water-impervious portion that surrounds and has a substantially circular cross-sectional shape is attached, and a groove is formed in the longitudinal direction so as to face the outer portion of the joint portion. The joint member is attached with the grooves facing each other, and the flanges on both ends of the steel sheet pile-like or channel steel-like substantially U-shaped joint member are housed in the grooves of the two joint members for the outer water shielding portion. And the web part is attached to the groove so that it can be locked, A steel pipe sheet pile water-proof joint structure that fills a pocket constituted by three joints for water-impervious parts with the top part and the outer part to shield water, and the flange of the T-shaped joint member A top elastic water-impervious member that can be sealed in contact with the inner surface of the top water-impervious joint member along the longitudinal direction is provided on the portion, and the lower end of the top elastic water-impervious member is buffered to abut against water. A bottom buffer water-impervious member is provided.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the bottom buffer water-impervious member is inserted into the groove of the top water-impervious joint member and rotated. It is characterized by being mounted and fixed.

  According to a third aspect of the present invention, in addition to the structure of the first or second aspect, the bottom buffer water-impervious member is attached to the bottom plate member, and the bottom plate member is attached to the bottom plate member. An operation member that is inserted through the groove and rotated and fixed by welding; a locking member that is attached to the bottom plate member and engages with the inner surface of the top water-blocking joint member; and a buffer member that is mounted on the bottom plate member It is characterized by comprising.

  According to a fourth aspect of the present invention, in addition to the structure of the third aspect, the water shielding joint structure of the steel pipe sheet pile is formed in a circular shape according to the inner diameter of the top water shielding joint member. The upper surface on which the bottom buffer water-impervious member cushions and contacts is configured as one of a planar shape, a concave shape, and an inclined surface shape.

  According to a fifth aspect of the present invention, in addition to the structure according to any one of the first to fourth aspects, the steel pipe sheet pile water-proof joint structure is long on both ends of the flange portion of the substantially U-shaped joint member. An outer elastic water-impervious member that contacts and contacts each inner surface of the outer water-impervious joint member along the direction is attached via a fixing member.

  According to a sixth aspect of the present invention, in addition to the structure of the fifth aspect, the fixing member is a metal plate material that is attached to the flange portion of the substantially U-shaped joint member. The outer elastic water-impervious member is fastened and fixed to the metal plate material with stud bolts and nuts.

  According to a seventh aspect of the present invention, in addition to the structure of the fifth aspect, the steel plate sheet pile watertight joint structure is formed by welding the metal plate material of the fixing member to the flange portion of the substantially U-shaped joint member. It is characterized by being fixed.

  According to an eighth aspect of the present invention, in addition to the structure according to any one of the fifth to seventh aspects, the outer elastic water-impervious member is formed in a bag shape having an annular cross section. It is characterized by this.

According to the water-tight joint structure of a steel pipe sheet pile according to claim 1 of the present invention, a CT-shaped steel-like T-shaped joint member is provided along one of the steel pipe sheet piles in the vicinity of the top of the opposing portion of the joint part of adjacent steel pipe sheet piles. A longitudinal groove into which the web portion of the T-shaped joint member is inserted on the other of the opposing portions, and the T-shaped joint member is surrounded by the outer surface of the steel pipe sheet pile alone or crossed. A joint member for the top water-impervious portion that has a substantially annular surface shape is attached, and a joint member for the outer water-impervious portion that has a groove in the longitudinal direction facing the outer portion of the joint portion and has a substantially annular cross-sectional shape, The grooves are attached so that the grooves are substantially opposed to each other, and the flanges on both ends of the steel sheet pile-like or groove-shaped steel-like substantially U-shaped joint member are housed in the grooves of the two outer water-impervious joint members. Parts are lockably attached to the grooves, and the tops and A steel pipe sheet pile water-proof joint structure that fills a pocket constituted by three joint members for a water-blocking part with a side and blocks water by filling with a filler. A bottom buffered water-impervious member that provides a top elastic water-impervious member that can be sealed in contact with the inner surface of the top water-impervious joint member in a direction while buffering and contacting the lower end of the top elastic water-impervious member Since the member is provided, the lower end of the top elastic shielding member is brought into contact with the bottom buffer water shielding member mounted and fixed on the top water shielding joint member, so that the primary water shielding layer at the top of the steel pipe sheet pile is completely formed. It can be in a water-impervious state, and the inside of a pocket constituted by three joint members for a water-impervious portion including the top portion and the outer side of the steel pipe sheet pile can be in a dry state.
Thereby, a foreign material does not mix at the time of filling with the filler for secondary impermeable layers, and the quality of a filler can be secured.

  According to the steel pipe sheet pile water-impervious joint structure according to claim 2 of the present invention, the bottom buffer water-impervious member is inserted from the groove of the top water-impervious joint member and rotated to be mounted and fixed. Therefore, even if it is a elongate top water-impervious joint member, it can be easily mounted and fixed to the bottom using a groove, and can be directly applied to an existing top water-impervious joint member.

  According to the water-tight joint structure of a steel pipe sheet pile according to claim 3 of the present invention, the bottom buffer water-impervious member is inserted into the bottom plate member, is inserted from the groove and is welded by being attached to the bottom plate member. Since it comprises the operation member to be fixed, the locking member that is attached to the bottom plate member and is locked to the inner surface of the top water-impervious joint member, and the buffer member that is mounted on the bottom plate member, the buffer member is attached to the bottom plate member. It is inserted from the groove through the operation member and rotated to close the bottom part and lock with the locking member, and by fixing the operation member by welding, it can be easily attached to the existing steel pipe sheet pile. It can be in a water-impervious state, the top elastic water-impervious member can be softly contacted by the buffer member (buffer state), and can be prevented from being forcedly deformed or damaged to ensure a water-impervious state at the bottom. .

  According to the steel pipe sheet pile water-impervious joint structure according to claim 4 of the present invention, the buffer member is formed in a circular shape corresponding to the inner diameter of the top water-impervious joint member, and the bottom buffer impermeable member is buffered. Since the upper surface in contact is configured as one of a flat surface, a concave surface, and an inclined surface, the top elastic water-impervious member can be brought into soft contact (buffer state) depending on the shape of these upper surfaces, and excessive deformation or damage can be caused. It can prevent and secure a water-blocking state.

  According to the water-tight joint structure for steel pipe sheet piles according to claim 5 of the present invention, each of the outer water-impervious joint members along the longitudinal direction is provided on both sides of the front end portion of the flange portions of the substantially U-shaped joint member. Since the outer elastic water-impervious member that contacts and contacts the inner surface of the water is attached via the fixing member, by attaching the outer elastic water-impervious member constituting the secondary water-impervious layer via the fixing member, Compared with the case where it is directly attached to the flange portion, it can be easily attached and water-shielded.

  According to the watertight joint structure of a steel pipe sheet pile according to claim 6 of the present invention, the fixing member is constituted by a metal plate material attached to a flange portion of the substantially U-shaped joint member, and the metal plate material is Since the outer elastic water-impervious member is fastened and fixed, the outer elastic water-impervious member is attached to the metal plate, and this metal plate is attached to the flange with bolts, nuts, etc. Compared to the case where the water member is attached, the outer elastic water-impervious member can be easily attached to the flange portion for water shielding.

  According to the watertight joint structure of the steel pipe sheet pile according to claim 7 of the present invention, since the metal plate material of the fixing member is fixed to the flange portion of the substantially U-shaped joint member by welding, By using a metal plate that is fixed by welding, the outer elastic water-impervious member attached to the metal plate can be easily attached to the flange by welding compared to the case of attaching the outer elastic impermeable member directly to the flange. Can be impermeable.

According to the water-tight joint structure for steel pipe sheet piles according to claim 8 of the present invention, since the outer elastic water-impervious member is formed in a bag shape having an annular cross section, a bag-shaped outer elastic water-impervious member is used. Thus, the contact area can be increased to further improve the water shielding property.
Here, ensuring the quality of the filler means that the filler can be maintained under conditions suitable for the use environment. For example, when mortar is used as the filler, there is no leakage and the pocket is in a dry state. To do. As a result, the filling material can be filled to every corner, so that the water permeability (water permeability coefficient) is lowered and the water shielding property is increased.

It is a partial enlarged plan view concerning one embodiment of the water-proof joint structure of the steel pipe sheet pile of this invention. It concerns on one Embodiment of the water-impervious joint structure of the steel pipe sheet pile of this invention, (a) is a partial top view, (b) is XX sectional drawing, (c) is a schematic perspective view. The steel pipe sheet pile water-impervious joint structure according to one embodiment of the present invention is applied to a bottom-buffered water-impervious member, (a) is a plan view, (b) is a front view, and (c) is a buffer member of another form. It is a front view. It is explanatory drawing of the attachment process of the bottom part buffering water-insulating member of one Embodiment of the water-proofing joint structure of the steel pipe sheet pile of this invention. It is a partial enlarged plan view concerning other embodiments of the water-proof joint structure of the steel pipe sheet pile of this invention. It is the elements on larger scale concerning the further another embodiment of the water-proof joint structure of the steel pipe sheet pile of this invention. It is a partial enlarged plan view concerning other embodiments of the water-proof joint structure of the steel pipe sheet pile of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, the basic joint structure of the water-impervious joint structure 10 of the steel pipe sheet pile will be described. As shown in FIG. 1, the top part which is the narrowest part of the opposing part of the joint part of the adjacent steel pipe sheet piles A and B Along the steel pipe sheet pile A, one end of the steel pipe sheet pile A is welded to the end of the web section 11a of the CT section steel 11 constituting the CT-shaped steel-like T-shaped joint member and protrudes in a T-shape. Attached. And the other steel pipe sheet pile B of an opposing part comprises the joint member for top water-impervious parts by which the cross-sectional shape provided with the groove | channel 12a of the longitudinal direction in which the web part 11a of CT shape steel 11 is inserted becomes a substantially cyclic | annular form. The pipe 12 to be welded is attached along the steel pipe sheet pile B so that the groove 12a is located on the steel pipe sheet pile A side, and the CT section 11 can be surrounded by the pipe 12 alone.

Moreover, in this steel pipe sheet pile joint structure, the groove 13a is formed in the longitudinal direction so as to be opposed to the wide portion of the steel pipe sheet piles A and B from the top which is the outer part of the opposing part of the joint part of the adjacent steel pipe sheet piles A and B. The pipes 13 constituting the joint member for the outer water-impervious portion having a substantially circular cross-sectional shape are respectively arranged and welded and attached along the steel pipe sheet piles A and B, and the respective grooves 13a are formed on the steel pipe sheet pile A, B is directed radially outward of the groove 13a. 13a are attached so as to face each other. And as a substantially U-shaped joint member of steel sheet pile shape or channel steel shape in the groove | channels 13a and 13a of the pipes 13 and 13 which comprise these two outer side water-impervious joint members, for example, the U-shaped steel sheet pile 14 Both end flange portions 14a and 14a are accommodated, and the web portion 14b is inserted into the grooves 13a and 13a, and is attached so as not to be locked and removed by these grooves 13a and 13a.
In addition, U-shaped joint members are not limited to U-shaped steel sheet piles, but in addition to grooved steel, angle steel, flat bars, round steel, etc. are welded to the flat plate surface or end face at both ends of the flat plate. The cross-sectional shape may be a substantially U-shape.
In addition, as a substantially U-shaped joint member, it is formed in a substantially U shape by bending the vicinity of both ends of the flat plate, or a flat bar is provided on the opposite side of the flat plate by welding or the like and spreads in two or more directions. The shape may be one that is less likely to be removed from the groove.

Therefore, a total triangular pocket 15 is formed by a total of three pipes 12, 13, 13 and CT-shaped steel 11, U-shaped steel sheet piles 14 constituting the joint members for the top portion and the outer water-impervious portion. Is configured. The pockets 15 of this joint structure are filled with a filler 16 for water shielding, and the pipes 12 and 13 and the U-shaped steel sheet piles are subjected to primary water shielding by the pipe 12 and the CT-shaped steel sheet pile 14. 14 to perform secondary water shielding.
In addition, the symbol 28 in a figure is the earth-and-sand intrusion prevention material which prevents the invasion of earth and sand from the groove | channels 12a, 13a, 13a.

  In the watertight joint structure 10 of the steel pipe sheet pile according to the present invention for shielding water by the primary water shielding layer and the secondary water shielding layer of such a joint structure, a CT type constituting a T-shaped joint member as the primary water shielding layer. Fixing members 17 such as stud bolts and nuts are attached in advance to the both ends of the flange portion 11b of the steel 11 at predetermined intervals along the longitudinal direction, and a top water-impervious joint member is configured through a presser fitting 17a. A top elastic water-impervious member 18 made of a rubber plate that can be sealed in contact with the inner surface of the pipe 12 is attached. And the space sealed by the inner surface of the pipe 12 and the flange part 11b of CT section steel 11 by attaching this top part elastic water-impervious member 18, and making both ends 18a and 18a contact the inner surface of the pipe 12, and sealing. 19 can be formed, and the outflow of the filler 20 such as mortar filled in the space 19 can be reliably prevented.

  Furthermore, in this steel pipe sheet pile water-impervious joint structure 10, the outer elastic water-impervious member 21 is also provided between the pipes 13 and 13 and the U-shaped steel sheet pile 14 constituting a substantially U-shaped joint member as a secondary impermeable layer. For example, it is composed of two seal rubbers 21a and 21b and is in contact with the inner surfaces of the pipes 13 and 13 for water shielding. The fixing member 22 is attached to the flange portions 14a and 14a.

These seal rubbers 21a and 21b are respectively attached to the inner and outer surfaces of the front end of the flange portion 14a of the U-shaped steel sheet pile 14 which is a substantially U-shaped joint member, and the metal constituting the fixing member 22 is formed on the inner surface of the flange portion 14a. The stud bolt 22b is attached to the plate material 22a, the seal rubber 21a is previously tightened with a nut through the presser fitting 22c, and the metal plate material 22a is welded in some places and attached to the flange portion 14a, whereby the full length of the U-shaped steel sheet pile 14 is obtained. To be installed over.
On the other hand, on the outer surface of the flange portion 14a, a stud bolt 22b is attached to a chevron steel plate 22d constituting the fixing member 22, and the seal rubber 21b is tightened with a nut in advance, and the base end of the seal rubber 21b is projected. The strip portion 21c is sandwiched between the tip portions of the flange portion 14a, and the metal plate material 22d is welded in some places and attached to the flange portion 14a, so that the U-shaped steel sheet pile 14 is attached over the entire length.

  Such an outer elastic water-impervious member 21 is attached to the flange portions 14a and 14a at both ends of the U-shaped steel sheet pile 14 and brought into contact with the inner surfaces of the pipes 13 and 13 so as to seal the inner surface of the pipe 13 and the U-shaped steel. The bottom portion of the substantially triangular shape of the pocket 15 can be sealed with the flange portion 14 a of the sheet pile 14, and the substantially triangular vertex portion is sealed with the already described CT section 11, pipe 12, and top elastic water-impervious member 18. In cooperation with, the filling material 16 such as asphalt mastic filled in the pocket 15 is prevented from flowing out.

Furthermore, in the water-impervious joint structure 10 of this steel pipe sheet pile, in order to more reliably perform the water-blocking of the apex portion of the substantially triangular shape by the CT steel 11 and the pipe 12 and the top elastic water-blocking member 18 as the primary water-blocking layer, The CT section steel 11, the pipe 12, and the lower end portion of the top elastic water shielding member 18 are water shielded.
The CT section steel 11, the pipe 12, and the bottom elastic water-impervious member 18 are shielded against water by the bottom buffer water-impervious member 23, and the lower end of the top elastic water-impervious member 18 is sealed to the bottom buffered water-impervious member. It is made to contact | abut in the buffering state made to contact softly with the upper surface of 23, and to make it water-block.
The bottom buffer water-impervious member 23 can be easily constructed by, for example, inserting it from the groove 12a of the pipe 12 which is a top water-impervious joint member and turning and fixing it. In addition, the attachment fixing method of the bottom buffer water-impervious member 23 is not limited to the case of rotating using the groove, but may be another method.

The bottom buffer water-impervious member 23 includes a disk-shaped metal bottom plate member 23a capable of closing the bottom of the pipe 12 in accordance with the inner diameter of the pipe 12, which is a top water-impervious joint member. An operation member 23b formed of a metal round bar is attached to the side surface of the member 23a so as to protrude radially outward by welding or the like. Further, a locking member 23c protruding downward is attached to the bottom plate member 23a on the opposite side of the operation member 23b in the radial direction by welding or the like, and prevents the bottom plate member 23a from rotating by being applied to the inner surface of the pipe 12. And can be locked.
Further, in this bottom buffer water-impervious member 23, a buffer member 23d is attached to the upper surface of the bottom plate member 23a, and is composed of, for example, rubber, foam rubber, foamed urethane, water expansion rubber, etc., and the shape of the upper surface of the buffer member 23d is By using a flat surface, or a concave buffer member 23e or an inclined buffer member 23f, the lower end of the top elastic water-impervious member 18 is softly brought into contact and deformed along the upper surface. It can be done.

Such a bottom buffer water-impervious member 23 is inserted from the groove 12a of the pipe 12 which is a top water-impervious joint member with the bottom plate member 23a and the buffer member 23d standing vertically, and the whole after inserting the locking member 23c. Is located in the pipe 12.
Thereafter, the bottom buffer water-impervious member 23 is turned so that the upper surface of the buffer member 23d is horizontal so as to close the pipe 12, and then the operation member 23b is welded to the pipe 12 outside the groove 12a. Fix it. Then, the operation member 23b protruding from the outer peripheral surface of the pipe 12 is cut.

In such a steel pipe sheet pile water-impervious joint structure 10, the bottom buffer water-impervious member 23 is attached to the bottom part of the pipe 12 which is a top water-impervious joint member when the pipe 12 and the pipe 13 are welded. After driving in a fixed state, the CT section steel 11 and the pipe 13 are welded to the other sheet pile A, and the top elastic water-impervious member 18 is attached to the flange section 11b while the web section of the CT section steel 11 is placed. 11a is inserted into the groove 12a of the pipe 12, and the pipe 13 is driven so as to face the pipe 13 of the steel sheet pile B.
Then, the web portion 14b is inserted into the grooves 13a and 13a of the two pipes 13 and 13 while welding the places with the outer elastic water-impervious member 21 attached to the flange portion 14a of the U-shaped steel sheet pile 14 via the metal plate material 22a. Suspend and cast so that is inserted.
Thereafter, the space 19 formed in the pipe 12 is filled with a filler 20 such as mortar and the filling material 16 such as asphalt mastic is filled in the substantially triangular pocket 15 to complete the construction.

In this manner, the steel pipe sheet pile A to which the top elastic water-impervious member 18 is attached is placed on the CT section steel 11 with the bottom buffer water-impervious member 23 mounted and fixed to the bottom of the pipe 12 that is the top water-impervious joint member. Thus, the lower end portion of the top elastic water-impervious member 18 can be brought into a water-impervious state by softly contacting the buffer member 23d and deforming along the upper surface.
As a result, the bottom portion of the pipe 12 can be more reliably shielded from water, the inside of the pocket 15 can be made dry, and the quality of the filler 16 can be ensured and completely filled to be sealed. Can do.

Next, another embodiment of the present invention will be described with reference to FIG. 5. However, the same parts as those in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.
In this steel pipe sheet pile water shielding joint structure 10A, the shape of the outer elastic water shielding member 24 is different.
The outer elastic water-impervious member 24 is formed in a bag shape having an annular cross-sectional shape, and bolts are attached to a chevron steel plate 22d that forms the fixing member 22 by overlapping both ends in the width direction of the seal rubber 24a. The nut 22e and the presser fitting 22c are attached in combination, and the other end portion of the metal plate material 22d is attached to the flange portion 14a of the U-shaped steel sheet pile 14 in some places.
Then, a space 25 formed in an annular bag shape and formed inside the sealing rubber 24a is filled with a filling material 26 such as bagging mortar and brought into close contact with the inner surface of the pipe 13 to obtain a sealed state.
In addition, the other structure is the same as the water-impervious joint structure 10 of the steel pipe sheet pile already demonstrated.
According to the steel pipe sheet pile water-impervious joint structure 10 </ b> A provided with such an outer elastic water-impervious member 24, the outer cross-sectional shape is annular and the bag-like outer elastic impermeable member 24 is used for sealing with the pipe 13. The necessary contact area can be increased to further improve the water shielding performance, and the same effects as the steel pipe sheet pile water shielding joint structure 10 described above can be achieved.

Next, still another embodiment of the present invention will be described with reference to FIG. 6. However, the same parts as those of the above-described embodiment will be denoted by the same reference numerals, and redundant description will be omitted.
In this steel pipe sheet pile water-impervious joint structure 10B, the mounting structure of the outer elastic water-impervious member 21 by the fixing member 22 is different from the steel pipe sheet pile water-impervious joint structure 10.
In this steel pipe sheet pile water-impervious joint structure 10B, the base end portions of the seal rubbers 21a and 21b constituting the outer elastic water-impervious member 21 are sandwiched between the inner and outer surfaces of the flange portion 14a of the U-shaped steel sheet pile 14, and the fixing member 22 Are attached with bolts and nuts 22e via a presser fitting 22c.
In addition, the other structure is the same as the water-impervious joint structure 10 of the steel pipe sheet pile already demonstrated.
According to the steel sheet pile sheet waterproof joint structure 10B in which such an outer elastic water shielding member 21 is directly attached to the flange portion 14a of the U-shaped steel sheet pile 14 with bolts and nuts 22e, the bolts can be used without performing on-site welding. -The outer elastic water-impervious material 21 can be attached by tightening the nut 22e, and the same operational effects as the steel pipe sheet pile water-impervious joint structure 10 described above are exhibited.

Next, another embodiment of the present invention will be described with reference to FIG. 7, but the same parts as those in the above-described embodiment will be denoted by the same reference numerals, and redundant description will be omitted.
In this steel pipe sheet pile water-impervious joint structure 10C, a grooved steel 27 is used instead of the U-shaped steel sheet pile 14 as a substantially U-shaped joint member, and the outer elastic water-impervious member 21 is configured only by the outer seal rubber 21b. It is different in point.
In the grooved steel 27 constituting the substantially U-shaped joint member, both end flange portions 27a and 27a are accommodated in the pipes 13 and 13, and the web portion 27b is inserted into the grooves 13a and 13a. It is attached by 13a so as not to be detached.
Then, on the outer surface of each flange portion 27a, 27a, a seal rubber 21b of the outer elastic water-impervious member 21 is combined with a mountain-shaped steel plate member 22d constituting the fixing member 22 with a bolt / nut 22e and a presser fitting 22c. It is attached by welding the other end of the metal plate material 22d in some places.
In addition, the other structure is the same as the water-impervious joint structure 10 of the steel pipe sheet pile already demonstrated.
The grooved steel 27 is used as such a substantially U-shaped joint member, and the steel pipe sheet pile water-impervious joint structure 10C in which the outer elastic water-impervious member 21 is constituted only by the outer seal rubber 21b reduces the number of members. By simplifying the shape, the manufacturing becomes easy, and the same effect as that of the watertight joint structure 10 of the steel pipe sheet pile already described is achieved.

In each embodiment, symbol 28 in the figure is a sediment entry preventive material that prevents the entry of sediment into the grooves 12a, 13a, 13a.
In each of the above embodiments, a U-shaped steel sheet pile or a grooved steel has been described as an example of a substantially U-shaped joint member. However, the present invention is not limited thereto, and a cross-sectional shape is formed by welding angle steel or the like to both ends of a flat plate. May be a steel material having a substantially U shape.
Furthermore, as a substantially U-shaped joint member, a flat bar, round steel, etc. may be integrated on the flat plate surface or end surface by welding or the like at both ends of the flat plate, and in the vicinity of both ends of the flat plate. The cross-sectional shape is approximately U-shaped, such as by bending it, or by forming a flat bar on the opposite side of the flat plate by welding, etc. to make it more difficult to pull out from the groove more than one direction. It may be a U-shape or a shape in which members are further added to the U-shape.

A, B Steel pipe sheet piles 10 Steel pipe sheet pile water-proof joint structure 11 CT section steel (T-shaped joint member)
11a Web part 11b Flange part 12 Pipe (joint member for top impermeable part)
12a Groove 13 Pipe (Fitting member for outer water shielding part)
13a Groove 14 U-shaped steel sheet pile (substantially U-shaped joint member)
14a Flange part 14b Web part 15 Pocket 16 Filler 17 Fixing tool 17a Press fitting 18 Top elastic water-impervious member 18a Both ends 19 Space 20 Filler 21 Outer elastic water-impervious member 21a Seal rubber 21b Seal rubber 21c Projection part 22 Fixing member 22a Metal plate material 22b Stud bolt 22c Press fitting 22d Metal plate material 22e Bolt and nut 23 Bottom buffer water-impervious member 23a Bottom plate member 23b Operation member 23c Locking member 23d Buffer member 23e Concave buffer member 23f Inclined buffer member 24 Bag-shaped outer elastic water-impervious member 24a Seal rubber 25 Space 26 Filler 27 Channel steel (substantially U-shaped joint member)
27a Flange 27b Web 28 Sediment prevention material

Claims (8)

A CT-shaped steel-like T-shaped joint member is attached along one steel pipe sheet pile to one side near the top of the opposing portion of the joint portion of adjacent steel pipe sheet piles, and the web portion of the T-shaped joint member is attached to the other of the opposing portions. A longitudinal groove to be inserted is provided, and the T-shaped joint member is enclosed alone or with the outer surface of the steel pipe sheet pile so as to attach a joint member for a top impermeable portion having a substantially annular cross-sectional shape,
A joint member for an outer water-impervious portion having a groove in the longitudinal direction facing the outer portion of the joint portion and having a substantially annular cross-sectional shape is attached with the grooves substantially opposed to each other. In the groove of the joint member for the part, the both end flange parts of the substantially U-shaped joint member of the steel sheet pile shape or the grooved steel shape are housed, and the web part is attached to be able to be locked in the groove.
A water-tight joint structure of a steel pipe sheet pile that is filled with a filler in a pocket constituted by three joint members for water-impervious portions with the top and the outside,
On the flange portion of the T-shaped joint member, while providing a top elastic water-impervious member that can be sealed in contact with the inner surface of the top water-impervious joint member along the longitudinal direction,
A steel-sheet sheet pile water-proof joint structure comprising a bottom-type buffer water-proof member for buffering and abutting the lower end of the top elastic water-proof member.   2. The water-tight joint structure for a steel pipe sheet pile according to claim 1, wherein the bottom buffer water-impervious member is configured to be inserted from the groove of the top water-impervious joint member and rotated and fixed. .   A bottom plate member that closes the bottom portion, an operation member that is attached to the bottom plate member, is inserted through the groove, is rotated and fixed by welding, and is attached to the bottom plate member and the top water shielding joint. The steel pipe sheet pile water-impervious joint structure according to claim 1 or 2, comprising a locking member for locking to an inner surface of the member and a buffer member attached on the bottom plate member.   The buffer member is formed in a circular shape according to the inner diameter of the top water-impervious joint member, and the upper surface on which the bottom buffer water-impervious member is buffer-contacted is configured as one of a planar shape, a concave shape, and an inclined surface shape. The steel pipe sheet pile water-impervious joint structure according to claim 3.   Fixing members for outer elastic water-impervious members that are in contact with the respective inner surfaces of the outer water-impervious joint members along the longitudinal direction on both sides of the front end portions of both end flanges of the substantially U-shaped joint member. The steel pipe sheet pile water-impervious joint structure according to any one of claims 1 to 4, wherein the steel pipe sheet pile is attached.   The fixing member is made of a metal plate attached to the flange portion of the substantially U-shaped joint member, and the outer elastic water-impervious member is fastened and fixed to the metal plate with a stud bolt / nut. A watertight joint structure for steel pipe sheet piles according to claim 5.   6. The watertight joint structure for steel pipe sheet piles according to claim 5, wherein the metal plate material of the fixing member is fixed to a flange portion of the substantially U-shaped joint member by welding.   The water-tight joint structure for steel pipe sheet piles according to any one of claims 5 to 7, wherein the outer elastic water-impervious member is formed in a bag shape having an annular cross section.

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