JP2019007148A - Fixing structure of joint material - Google Patents

Abstract

To provide a fixing structure of a joint material which can eliminate a space between the joint material and an opening portion, securely fix the joint material and ensure water blocking.SOLUTION: A fixing structure 1 of a joint material includes a joint material 10 having attachment portions 12 at both ends, joint material attachment grooves 40 provided in a vertical direction with a joint portion 32 of a caisson 31 interposed therebetween and each having a slit-like opening portion 41, and guide fixing members 50 attached to both sides of the attachment portion 12 and guiding insertion and attachment in the joint material attachment groove 40. The attachment portion 12 is disposed in the joint material attachment groove 40, the guide fixing member 50 is embedded and fixed in a filler material, and a displacement absorption portion 11 is disposed in the joint portion 32 via the opening portion 41. The fixing structure 1 of a joint material also includes an elastic sealing material 60 which is brought into contact with the inner surface of the opening portion 41 and seals the opening portion 41, and a bag body disposed in the joint material attachment groove 40 and widening with a filling and widening material to press the elastic sealing material 60 against the inner surface of the opening portion 41.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a joint material fixing structure.

  For structures such as revetments and revetments at managed waste disposal sites, caisson and blocks are arranged side by side, and elastic joints are attached to joints such as adjacent caisson wife walls. The elasticity of joint materials prevents leakage of earth and sand, waste, retained water, water shielding materials, etc., even if the distance between joints is displaced due to ground fluctuations due to waves, tidal fluctuations, earthquakes, etc. or uneven settlement.

For example, Patent Document 1 discloses a fixing structure for a joint material of a structure such as a caisson.
Mounting grooves (grooves) are provided in the vertical direction on opposing side wall portions (wife wall portions) constituting the joint portions of the caisson arranged continuously, and the opening portions of the mounting grooves are narrowed in a slit shape. The joint material is an elastic material having a width that fits in the mounting groove on both sides and a mounting portion (locking portion) having a portion that cannot be removed from the slit-shaped opening, and having a width sufficiently wider than the joint width. The displacement absorbing portion (water-impervious film) is provided. The joint material is inserted and attached so that the attachment portions at both ends are fitted in the respective attachment grooves of the opposing caissons and the joint portions are closed. The joint material is filled with a filler in the gap of the mounting groove, the mounting portion is fixed, and the joint portion is impermeable.
Thus, the joint material allows displacement and prevents leakage of earth and sand, waste, retained water, water shielding material, and the like.

JP 2005-146659 A

In the joint material fixing structure disclosed in Patent Document 1, the joint material mounting portion is inserted into the caisson mounting groove, the displacement absorbing portion is disposed in the joint portion through the slit-shaped opening, and the gap in the mounting groove is filled. However, it is difficult to insert the joint material into the mounting groove from the upper side after the adjacent caisson is installed, and even if the filler is injected into the gap of the mounting groove. The filler leaks due to the gap between the inner surface of the slit-shaped opening and the joint material.
For this reason, it is difficult to fix the joint material itself to the mounting groove, and there arises a problem that the water shielding property of the joint part cannot be ensured due to a gap between the joint material and the inner surface of the opening.

  The present invention has been made in view of the above-described prior art, and provides a joint material fixing structure that eliminates the gap between the joint material and the opening, can reliably fix the joint material, and can ensure water shielding. For the purpose.

In order to achieve the above object, the joint material fixing structure of the present invention comprises:
A joint material having attachment portions at both ends;
A joint material mounting groove provided in a vertical direction across the joint part of the structure and provided with a slit-shaped opening;
A guide fixing member that is attached to both sides of the mounting portion and guides the insertion of the joint material into the joint material mounting groove,
The mounting portions at both ends are disposed in the filler material filling groove and are embedded and fixed in the guide fixing member, and a displacement absorbing portion is disposed at the joint portion through the opening. It is a fixing structure of joint material,
An elastic sealing material attached to the attachment portion and applied to the inner surface of the opening to seal the opening;
A bag body arranged in the joint material mounting groove and widened by filling with a filling widening material to press the elastic sealing material against the inner surface of the opening,
It is characterized by that.

The elastic sealing material includes a friction reducing member that reduces friction between the elastic sealing material and the inner surface of the opening when being mounted in the joint material mounting groove.
It is preferable.

The friction reducing member includes an inclined surface at a lower end portion on the inner surface side of the opening.
It is preferable.

The guide fixing member includes a reaction force receiving portion that receives the reaction force due to the widening of the bag body and presses the elastic sealing material.
It is preferable.

The guide fixing member includes an elastic pressing member that abuts on the inner surface of the joint material mounting groove and applies a pressing force that presses the guide fixing member against the inner surface side of the opening, at least at the lower end.
It is preferable.

The elastic pressing member is bent in a U-shape and fixed at one end to the guide fixing member, the intermediate portion is abutted against the joint material mounting groove, and the other end is provided in an open state.
It is preferable.

When the elastic sealing material is mounted in the joint material mounting groove, the friction reducing member does not contact the inner surface of the opening without contacting the inner surface of the opening, and deforms due to the widening of the bag body. Formed in a shape that comes into contact with the inner surface of the opening,
It is preferable.

The guide fixing member includes a through hole through which the filler filled in the joint material mounting groove flows.
It is preferable.

The elastic sealing material includes a string-like filler holding member that is provided at a lower end portion and spreads at a bottom surface of the joint material mounting groove to prevent and hold out the filler.
It is preferable.

The filler holding member is configured by attaching and fixing an upper end edge to a recess formed in the elastic seal material.
It is preferable.

  According to the joint material fixing structure of the present invention, there is no gap between the joint material and the opening, the joint material can be reliably fixed, and water shielding can be ensured.

It is the top view, sectional drawing, and partial enlarged view explaining the management type revetment to which the fixing structure of the joint material of this invention is applied. It is a schematic sectional drawing explaining the trench part on the ground improved by the deep mixing process method to which the fixing structure of the joint material of this invention is applied. Each of the embodiments according to the present invention is a schematic plan view. It is a top view of the state before fixation concerning one embodiment of the present invention. It is a partial enlarged plan view of the fixed state concerning one embodiment of the present invention. It is a partial front view concerning one embodiment of the present invention. It is a schematic side view explaining operation | movement of the elastic press member concerning one embodiment of this invention. It is a partial expanded side view of an intermediate part concerning one embodiment of the present invention. It is a partial expanded side view of a lower end part concerning one embodiment of the present invention. It is a schematic plan view of the state before fixation concerning other embodiment of the fixing structure of the joint material of this invention.

Hereinafter, an embodiment of the joint material fixing structure of the present invention will be described in detail with reference to the drawings.
The joint material fixing structure 1 of the present invention is attached so as to straddle the joint portion 32 between the structures 31 and 31, for example, the joint portion 32 between the caissons 31 and 31 of the management-type revetment 30 of the sea surface waste disposal site. It is applied to the insertion type joint material 10 and allows a relative displacement amount of the joint part 32 generated by the earthquake motion to prevent leakage of waste and retained water to the sea side S.
The joint material 10 has various insertion types such as a plate-shaped joint material 10A (see FIG. 4) and a cylindrical joint material 10B (see FIG. 10) depending on the performance required as the management-type revetment 30, that is, the required water shielding performance. The joint material 10 can be appropriately selected and used.
In addition, the displacement amount of the required water-impervious performance is not only the displacement amount of the level 1 seismic motion that is the displacement of the primary permissible amount due to the ground motion, but also the displacement amount of the level 2 seismic motion that exceeds the displacement of the primary permissible amount. The insert type joint material 10 satisfying any of these is used.

The caisson 31 of the management-type revetment 30 of the sea surface waste disposal site as a structure is installed via an asphalt mat 34 on a rubble mound 33 constructed on the seabed ground, for example, as shown in FIG. In the joint portion 32 between the caissons 31 and 31, for example, two sealing materials 35 and 35 are provided. Between the two sealing materials 35, 35, a deformation followable water shielding material such as asphalt mastic is filled as the joint portion water shielding material 36 and is sealed. The landfill side E at the bottom of the caisson 31 is covered with a resin-based water-impervious sheet 37 along the rubble mound 33 from the asphalt mat 34, and is pressed and blocked by the asphalt mastic 38.
In addition, the caisson 31 is improved by a deep mixing treatment method, which is an impervious ground improvement method using concrete, asphalt, and soil-based water shielding materials, as shown in FIG. 2, instead of the rubble mound 33. In some cases, it is installed in the trench portion 39 formed.
The structure is not limited to a caisson made of concrete, steel plate, hybrid made by combining these used as a management-type revetment, but may be an L-type block or a cellular block, etc. It can be widely applied to structures and the like that need to ensure tolerance and water shielding.

As shown in FIG. 3, the joint material fixing structure 1 according to the present invention is filled with a joint portion water-impervious material 36 between two seal members 35, 35 of the joint portion 32 between the caissons 31, 31. It is applied to the joint material 10 in the case of being provided in addition to the water shielding work (see FIG. 3A), or applied to the two joint materials 10 provided in place of the sealing material 35 and the joint portion water shielding material 36. (See FIG. 3B).
Further, the present invention can be applied to the four joint materials 10 in the case where the joint material 10 is provided instead of the two sealing materials 35 and 35 on both sides for sealing the joint water-impervious material 36 filled in the joint portion 32 (FIG. 3). (See (c)).
Thereby, in any case, leakage of waste and retained water is prevented by the joint material 10.

The joint material fixing structure 1 according to the present embodiment includes a joint material mounting groove 40 provided in a vertical direction with a joint portion 32 of a caisson (structure) 31 and provided with a slit-shaped opening 41, a structure 31, A joint material 10 having an intermediate displacement absorbing portion 11 that seals leakage from the joint portion 32 while allowing displacement between the joint portions 32 and attachment portions 12 at both ends, and joint material attachment grooves 40 that are attached to both sides of the attachment portion 12. And a guide fixing member 50 that guides insertion of the joint material 10 into the joint. Further, the joint material fixing structure 1 has the mounting portions 12 at both ends disposed in the joint material mounting groove 40 and embedded in the filler 51 to be filled and fixed in the guide fixing member 50, and through the opening 41. The displacement absorbing portion 11 is disposed on the joint portion 32. Furthermore, the fixing structure 1 of the joint material 10 includes an elastic seal material 60 that is attached to the attachment portion 12 and is applied to the inner surface of the opening portion 41 to seal the opening portion 41, and a filling widening material that is disposed in the joint material attachment groove 40. And a bag body 70 that widens by filling 71 and presses the elastic sealing material 60 against the inner surface of the opening 41.
The joint material 10 may be applied as long as the attachment portions 12 are provided at least at both ends, and may constitute the displacement absorbing portion 11 that absorbs displacement by the material itself.

The joint material mounting groove 40 is formed along the vertical direction on the end wall surfaces 31a and 31a facing each other with the joint portion 32 of the caisson 31 and 31 as a structure interposed therebetween.
The joint material mounting grooves 40 and 40 are provided with slit-shaped openings 41 and 41, respectively, and substantially rectangular spaces 42 and 42 are formed inside.
For example, as shown in FIGS. 4 and 5, the joint material mounting grooves 40, 40 have a recess having a rectangular cross section formed on the end wall surface 31 a of the caisson 31, and a rectangular cross section having a U-shaped cross section. A body 43 is attached and configured. A slit-like opening 41 and an inner space 42 are formed so that the opening of the frame body 43 is closed by two plate members 44. Further, for example, the opening side edge portion of the plate material 44 is processed into an arc shape (R processing) in the opening portions 41 and 41, thereby preventing damage by bringing the joint material 10 into contact with the arc surface.
Instead of processing the opening side edge of the plate member 44 into an arc shape (R processing), the joint material 10 may be contacted with the arc surface by welding a round bar.
In the joint material mounting grooves 40 provided in the caissons 31, 31, the mounting portions 12 at both ends of the joint material 10 are respectively attached to the guide fixing members 50 and inserted through the openings 41, 41 as will be described later. After that, a filling material 51 such as mortar is filled in the spaces 42 and 42 and fixed and installed.

  If the opening 41 has a slit shape (narrow width) and a space 42 is formed inside, the cross-sectional shape of the joint material mounting groove 40 is not limited to a rectangle, but may be other shapes such as a circle. There may be. In addition, the opening 41 is not limited to the case where the opening 41 is positioned on the wife wall surface 31 a of the caisson 31 and the space 42 is disposed in the caisson 31, but the frame body 43 made of steel or the like is projected from the wife wall surface 31 a of the caisson 31. It can also be attached to the joint material mounting groove 40.

The joint material 10 includes an intermediate displacement absorbing portion 11 and attachment portions 12 at both ends.
For example, as shown in FIG. 4, the joint material 10 of the present embodiment includes a primary side displacement absorbing portion 11 a in which the displacement absorbing portion 11 follows a displacement amount of level 1 ground motion as a primary allowable amount, and a primary allowance. It is composed of a secondary side displacement absorbing portion 11b that follows the displacement amount of the level 2 earthquake motion exceeding the displacement of the capacity. In the joint material 10, the primary side displacement absorbing part 11a and the secondary side displacement absorbing part 11b are configured independently, and the primary side displacement absorbing part 11a covers the both sides of the secondary side displacement absorbing part 11b. Has been placed.
At both ends of the primary side displacement absorbing portion 11a and the secondary side displacement absorbing portion 11b, a flat plate-like primary side attaching portion 12a and a secondary side attaching portion 12b are integrally provided, respectively.
By doing so, the force for displacing the primary side displacement absorbing portion 11a to the secondary side displacement absorbing portion 11b is not applied from the primary side attaching portion 12a via the secondary side attaching portion 12b. The displacement absorbing portions 11a and 11b can be displaced independently.
In addition, in the joint material 10, the primary side displacement absorption part 11a should just be provided in the at least one side of the secondary side displacement absorption part 11b, or the upstream side to which the force which displaces the secondary side displacement absorption part 11b is added, or It is provided on both sides of the upstream side and the downstream side.
That is, the joint material 10 prevents the leakage of earth and sand, waste, retained water, water shielding material and the like by allowing the displacement at the primary side displacement absorbing portion 11a until the level 1 earthquake motion. At the same time, the primary displacement absorber 11a can be provided on at least one side of the secondary displacement absorber 11b to function so as to regulate the displacement of the secondary displacement absorber 11b.
On the other hand, for the displacement amount exceeding the displacement amount of the level 1 earthquake motion, the primary side displacement absorbing portion 11a is broken, and the secondary side displacement absorbing portion 11b allows the displacement, thereby preventing leakage.
Thereby, the joint material 10 prevents leakage of waste and retained water from the joint portion 32 between the caissons 31 and 31 by the primary side displacement absorbing portion 11a with respect to the level 1 earthquake motion. For level 2 seismic motion, the joint material 10 is treated by the waste and retained water in the sea surface waste disposal site even if the structure (seawall) itself such as the caisson 31, 31 is deformed by the secondary displacement absorbing part 11b. Prevent leakage (outflow or leaching) from 32 to the outside.
Note that the joint material 10 has the primary side displacement absorbing portion 11a as a function only for regulating the displacement of the secondary side displacement absorbing portion 11b, and the secondary side of both the level 1 and level 2 earthquake motions. The side displacement absorbing portion 11b may allow displacement and perform water shielding or the like.

The primary side displacement absorbing portion 11a is formed in a sheet shape by an elastic material, and the displacement amount of the level 1 seismic motion can be allowed by the shape effect such as the flexibility of the elastic material and / or the folded shape. It is configured so that it can.
As the primary side displacement absorbing portion 11a, a material having a reinforcing structure in which a reinforcing material is placed inside an elastic material as required and the outside is used as an elastic material is used. Similarly, the attaching portion 12a is also reinforced with a reinforcing material as necessary, and is attached to a guide fixing member 50, which will be described later, via a bolt / nut 52, and is inserted into and fixed to the joint material attaching groove 40.
The primary side displacement absorbing portion 11a is disposed in the joint portion 32 and keeps a sealed state following the amount of displacement up to the level 1 earthquake motion to prevent leakage of earth and sand, waste, retained water, water shielding material, and the like. .
In addition, the primary side displacement absorption part 11a should just be able to track the displacement amount to a level 1 earthquake motion, for example, the range which assumed the relative displacement amount as 100-200 mm, The shape is not restricted to the shape which turned up and piled up, The shape employed in the water-stopping member so far, such as a meandering shape, can be employed.

The secondary side displacement absorbing portion 11b is formed of a sheet-like elastic material and is disposed across the joint portion 32. For example, the secondary side displacement absorbing portion 11b allows displacement due to level 2 earthquake motion between the caissons 31 and 31 that are structures. The shape can be prevented.
That is, the secondary side displacement absorbing portion 11b is assumed to have a relative displacement amount of 100 to 200 mm in the primary side displacement absorbing portion 11a, while the relative displacement amount is assumed to be a maximum of 750 mm, for example. Even if it exists, it is set as the shape which can permit a displacement and can prevent a leak.
For example, as shown in FIG. 4, the secondary side displacement absorbing portion 11 b is formed by meandering a sheet-like elastic material having a length (horizontal width) that can correspond to an assumed displacement amount. The The secondary side displacement absorbing portion 11b is fixed to the joint material mounting grooves 40 of the caissons 31 and 31 which are structures adjacent to the secondary side mounting portions 12b at both ends via the guide fixing member 50.
As a result, even if the caisson 31, 31 as a structure is damaged by the level 2 earthquake motion, the relative displacement is set to a maximum of 750 mm (total displacement is 1500 mm) by the secondary side displacement absorbing portion 11b. Outflow (leakage) from the joints 32 of waste and retained water inside the revetment such as 31, 31 can be prevented.
The secondary displacement absorbing portion 11b is not limited to meandering to secure a necessary amount of displacement, but is folded at a plurality of locations such as a winding shape or both ends that are folded and wound at the center portion. The folded shape or the like may be used as long as it has a length (horizontal width) that can follow the amount of displacement of the level 2 earthquake motion.

The joint material 10 is formed to have a required length (vertical width) according to the height of the caisson 31 in the vertical direction, and is manufactured by connecting a plurality of elastic material sheets by bonding or the like.
In addition, as for the joint material 10, it is preferable to provide the part cut | disconnected after construction in the upper end part as needed, such as lifting and inserting.

About the bottom edge part of the joint material 10, it follows the bottom edge part (lower end part) of the primary side displacement absorption part 11a and the secondary side displacement absorption part 11b, and at least the bottom edge part of the secondary side displacement absorption part 11b. A water shielding material such as an elastic body is attached, and the water shielding material of the elastic body is compressed by the dead weight of the joint material 10 to follow the water.
Moreover, an elastic body, a brush-like thing, etc. can also be provided in the bottom edge part of the primary side displacement absorption part 11a or the secondary side displacement absorption part 11b. Accordingly, it is possible to cope with any displacement of the joint material 10 of the level 1 earthquake motion and the level 2 earthquake motion.
In addition, when installing the caisson 31 in the trench part 39 on the ground improved by the method of the deep mixing process shown in FIG. 2, the trench part is provided without providing an elastic body at the bottom edge part of the joint material 10. It is also possible to shield water by the water shielding material in 39.

Next, the case where the joint material fixing structure 1 of the present invention is applied to fix the joint material 10 via the joint material mounting groove 40 will be described.
The joint material 10 has a primary side mounting portion 12a superimposed on both sides of the secondary side mounting portion 12b, and a guide fixing member 50 is applied to the outside of each primary side mounting portion 12a. The guide fixing member 50 is attached by 52.
Thereby, while maintaining the shape of the attachment part 12 of the joint material 10 in the up-down direction linearly, workability | operativity at the time of hanging and inserting in the joint material attachment groove 40 is improved.

The guide fixing member 50 is formed of a steel material, and as shown in FIGS. 4 to 6, the front surface portion 50 a on the opening 41 side of the joint material mounting groove 40 and the joint material 10 perpendicular to the front surface portion 50 a are applied. The cross-sectional shape of the portion 50b and the back surface portion 50c formed so as to spread outward with respect to the intermediate portion 50b is substantially U-shaped. The back surface portion 50c is extended longer than the front surface portion 50a, and the extended portion serves as a reaction force receiving portion 50d of the pressing force toward the opening 41 side.
The guide fixing members 50 are arranged on both sides of the mounting portion 12 of the joint material 10, and the bolts and nuts 52 are passed through the mounting portions 12 of the overlapping joint material 10 applied to the outer surfaces of the respective intermediate portions 50 b. It is attached.
The guide fixing member 50 has a length corresponding to the height of the caisson 31.
For example, the guide fixing member 50 is divided into a plurality of parts so that it can be inserted while attaching the guide fixing member 50 at the time of construction, and the divided parts are connected in accordance with the progress of work and attached to the joint material 10 as needed. Like that.
The guide fixing member 50 is divided in the vertical direction, and is attached to the upper and lower ends of each of the guide fixing members 50 by welding or the like so that the horizontal flange plate 53 covers the middle part 50b to the front part 50a and the end part of the rear part 50c. Yes. The divided guide fixing members 50 are vertically arranged and connected by connecting bolts and nuts 54 so that the flange plate 53 at the lower end and the flange plate 53 at the upper end are aligned with each other (see FIG. 6).
The flange plate 53 is formed with a through hole 55 through which the filler 51 filled in the joint material mounting groove 40 flows, and cooperates with the welding scallop to serve as a hole for inflow of the filler 51 and air vent. Let it function (see FIG. 5). The through-hole 55 is also formed in the back surface part 50c which becomes a vertical wall of the guide fixing member 50 so that the filler 51 can flow into the guide fixing member 50 (see FIG. 6).
When the guide fixing member 50 is attached in advance to the joint material 10 at a factory or the like, the divided parts are attached at intervals so that the guide fixing member 50 can be folded and placed in a flat state. It is also possible to connect a connecting member (not shown) to the opened portion so as to be continuous with the height of the caisson 31.

The joint material fixing structure 1 includes an elastic sealing material 60 formed of an elastic material. As shown in FIG. 4, the mounting portion 60a and the sealing portion 60b are integrated to form an L-shaped cross section. The seal portion 60b is formed in a flat plate shape, for example.
The elastic sealing material 60 has a mounting portion 60a of the elastic sealing material 60 disposed outside the mounting portion 12 of the joint material 10 (see FIG. 4). After the joint material 10 is inserted into the joint material mounting groove 40, a bag, which will be described later. By widening the body 70 with the filling widening material 71, the opening portion 41 is elastically deformed and pressed against the seal portion 60b to seal the opening portion 41 (see FIG. 5).

The elastic sealing material 60 seals the opening 41 by coming into contact with the inner surface of the opening 41, but in order to further improve the sealing performance, the bottom of the joint material mounting groove 40 is sealed. A string-like filler holding member 61 that spreads at the bottom surface 45 of the mounting groove 40 and prevents the filler 51 from flowing out is provided.
The filler holding member 61 is fixed to the recess 62 formed in the elastic seal material 60 with the upper edge thereof being attached.
The filler holding member 61 is provided in the full width of the lower end portion of the elastic seal material 60 and the full width of the attachment portion 60a and the seal portion 60b, and is filled in a state where the elastic seal material 60 hits the bottom surface 45 of the joint material attachment groove 40. The length of each string-like body and the density (number) of the string-like bodies are set so that the material holding member 61 spreads so as to be entangled and the filler 51 such as grout can be held even if seawater or the like cannot be held.
The filler holding member 61 is configured, for example, by bundling polyester string-like bodies, and the base end portion is inserted into the concave portion 62 of the elastic seal material 60 and fixed by vulcanization adhesion or the like.
Therefore, the filler holding member 61 is preferably provided with heat resistance that can withstand the temperature of vulcanization adhesion, for example, about 100 ° C., preferably about 130 ° C.
The filler holding member 61 is not limited to vulcanization bonding, but may be fixed to the elastic sealing material 60. The filling material holding member 61 may be fixed by other bonding methods or may be mechanically secured by bolts and nuts by being sandwiched by a backing plate. You may make it fix to.
Further, the material of the string-like body of the filler holding member 61 is not limited to polyester, and may be other materials, and the thickness and length of each string-like body can hold the filler such as grout. The cross-sectional shape is not limited to a circle, and may be another shape such as an ellipse.

The elastic sealing material 60 includes a friction reducing member 80 that reduces the friction between the elastic sealing material 60 and the inner surface of the opening 41 when being mounted in the joint material mounting groove 40.
The friction reducing member 80 is made of, for example, a plate-shaped steel material, and is countersunk over the entire length in the vertical direction of the joint material mounting groove 40 so as to cover approximately half of the seal portion 60b of the elastic seal material 60 on the opening 41 side. -It is attached from the outside (opening 41 side) with a nut 81 (see FIGS. 4, 5 and 7).
By doing so, the joint material 10 is inserted into the joint material mounting groove 40 in a state where the surface of the friction reducing member 80 is in contact with the inner surface of the opening 41 and about half of the seal portion 60b of the elastic seal material 60 is not in contact. be able to.
Therefore, the elastic sealing material 60 made of an elastic material can be inserted with a small pushing force compared to the case where the elastic sealing material 60 is inserted in contact with the inner surface of the opening 41, and the elastic sealing material 60 is prevented from being wrinkled by friction. It can be inserted and insertion can be facilitated.
The friction reducing member 80 is not limited to a plate-shaped steel material, and may be another material such as a synthetic resin plate material as long as it can reduce friction and suppress generation of wrinkles.

  As shown in FIG. 8, the friction reducing member 80 includes an inclined surface 82 at the lower end portion on the inner surface side of the opening 41. The inclined surface 82 is formed as an inclined surface 82 that is inclined from the front surface side (the inner surface side of the opening 41) of the friction reducing member 80 toward the rear surface side of the friction reducing member 80. Thus, when the friction reducing member 80 is inserted while being in contact with the inner surface of the opening 41 of the joint material mounting groove 40, the plate member 44 constituting the inner surface of the opening 41 has a stepped portion 44a such as a welded portion. Can be smoothly inserted without being caught.

The joint material fixing structure 1 includes a bag body 70 which is disposed in the joint material mounting groove 40 and widens by filling with a filling widening material 71 to press the elastic seal material 60 against the inner surface of the opening 41. The bag body 70 is formed, for example, in a cylindrical shape with a stretchable material and closed at the bottom, and is configured so that the filling widening material 71 filled therein can be widened without leaking. . For example, the bag body 70 is inverted so that the knot is inside by tying the bottom of the woven fabric cylindrical body, and the knot at the bottom is used as a substantially flat shape. The bag body 70 is filled with a liquid widening material 71 such as grout and widened, for example.
In addition, the bottom part of the bag body 70 should just be blocked | closed, You may make it close not only in the case of tying and closing, but by another method.
The bag body 70 is disposed between the front surface portion 50a and the back surface portion 50c of the guide fixing member 50. When the bag body 70 is widened, the bag body 70 is brought into contact with the inner side of the front surface portion 50a of the elastic seal material 60 so as to contact the inner surface of the opening 41. It is arranged so that it can be pressed.
The widened bag body 70 is supported by being hit against the back surface portion 50c and the reaction force receiving portion 50d of the guide fixing member 50, whereby a pressing force to the elastic sealing material 60 side is applied, and the flat elastic sealing material 60 is sealed. The part 60b is elastically deformed and pressed against the opening 41 of the joint material mounting groove 40 to be in a sealed state.
Therefore, the circumferential length of the bag body 70 on the cross section is such that the seal portion 60b of the elastic seal material 60 is elastically deformed in a widened state and pressed against the opening 41 of the joint material mounting groove 40 so as to be in a sealed state. Is set.
By arranging the bag body 70 in a narrow space between the front surface portion 50a and the back surface portion 50c of the guide fixing member 50, it is possible to widen with a small filling widening material 71, and the force due to the widening is effective for sealing the elastic sealing material 60. Can be used.
Note that the bag body 70 is not limited to the filling widening material 71 such as grout as the filling widening material 71 filled inside, but is widened by filling a solid such as gas or sand as the filling widening material 71. It suffices to make the bag 70 a material that can be widened without leaking the filling widening material 71 depending on the filling widening material 71 to be used, and even if the material itself does not expand and contract, it expands as a bellows shape or a folded shape. You may be able to do that.

The bag body 70 is inserted together with the guide fixing member 50 when the bottom of the bag body 70 is attached in advance to the guide fixing member 50 and the guide fixing member 50 to which the joint material 10 is attached is inserted into the joint material mounting groove 40. To wear. Alternatively, as a separate process, after inserting the guide fixing member 50 to which the joint material 10 is attached into the joint material attaching groove 40, the bag body 70 is inserted between the front surface portion 50 a and the back surface portion 50 c of the guide fixing member 50. To do. In this case, in order to prevent the bag body 70 from being lifted up, stones, sand, or the like is placed as a weight to facilitate insertion.
The bag body 70 may be inserted at the same time as or after the guide fixing member 50 is inserted.

Usually, after the joint material 10 and the elastic seal material 60 are inserted into the joint material mounting groove 40 installed in the caisson 31 via the guide fixing member 50, the guide fixing member 50 is operated from the upper part of the caisson 31 to guide the fixing member. It is almost impossible to move 50 so as to contact the inner surface of the opening 41 of the joint material mounting groove 40.
Therefore, in the joint material fixing structure 1 according to the present embodiment, when the guide fixing member 50 is inserted into the joint material mounting groove 40, the friction reducing member 80 applied to the outside of the elastic seal material 60 is used as the joint material mounting groove 40. It inserts so that it may contact the inner surface of the opening part 41 of this.
For this reason, the guide fixing member 50 is attached to the guide fixing member 50 and abuts against the inner surface (back surface) of the joint material mounting groove 40, thereby providing an elastic pressing member 90 that applies a pressing force to press against the inner surface side of the opening 41. It has.
4, 5, and 7, for example, the elastic pressing member 90 is provided at least at the lower end of the reaction force receiving portion 50d of the guide fixing member 50. For example, as shown in FIG. Are provided at a plurality of locations.
As the elastic pressing member 90, for example, a U-shaped spring (U-bolt) 91 formed in a U-shape is used, and as shown in FIG. 7, the end portion 91a is arranged vertically and the arc portion 91b is attached to the joint material. The lower end 91a is fixed to the reaction force receiving portion 50d of the guide fixing member 50 with a nut 92 so as to be in contact with the back surface of the groove 40, and the upper end 91a is passed through the through hole 50e in a free state.
The elastic pressing member 90 is attached to the guide fixing member 50, and the friction reducing member 80 outside the elastic seal member 60 attached to the guide fixing member 50 is in contact with the inner surface of the opening 41 of the joint material attachment groove 40. Alternatively, the length is set to a length (a distance from the inner surface of the joint material mounting groove 40) in which a pressing force is applied to the inner surface side of the opening 41.

In the joint material fixing structure 1 provided with the elastic pressing member 90, the guide fixing member 50 to which the joint material 10, the elastic seal material 60, and the friction reducing member 80 are attached is inserted and attached to the joint material mounting groove 40. Then, the arc portion 91 b of the U-shaped spring 91 comes into contact with the back surface of the joint material mounting groove 40, and a pressing force is applied to the inner surface side of the opening 41 via the reaction force receiving portion 50 d of the guide fixing member 50.
Thereby, the friction reduction member 80 can be inserted and attached so that the inner surface of the opening part 41 of the joint material attachment groove 40 may be contact | connected.
When the joint material 10 is inserted into the joint material mounting groove 40 by the guide fixing member 50, if there is a step portion on the back surface of the joint material mounting groove 40, as shown in FIG. Although the arc portion 91b of the U-shaped spring 91 of the member 90 comes into contact, as shown in FIG. 7B, the U-shaped spring 91 is elastically deformed so that the stepped portion can be overcome, and the guide fixing member 50 The insertion into the joint material mounting groove 40 can be continued. When the elastic pressing member 90 gets over the stepped portion or the like, in addition to the elastic deformation of the U-shaped spring 91, the reaction force receiving portion 50d of the guide fixing member 50 is deformed so as to be bent, and thus the stepped portion is smoother. The joint material 10 can be inserted after overcoming.

Such an elastic pressing member 90 is provided at least at the lower end of the guide fixing member 50, so that the bottom of the guide fixing member 50 is reduced in friction at a predetermined position of the joint material mounting groove 40, that is, outside the elastic sealing material 60. If the member 80 comes into contact with the inner surface of the opening 41, even if the guide fixing member 50 is inclined to the back side, the friction can be reduced by raising the bottom of the guide fixing member 50 to the front side. The member 80 can be brought into contact with the inner surface of the opening 41 (predetermined state).
In addition, by providing a plurality of elastic pressing members 90 at intervals in the guide fixing member 50, the guide fixing member 50 can be inserted not only at the bottom but also at a predetermined position in the joint material mounting groove 40. it can.
The elastic pressing member 90 is constituted by the U-shaped spring 91 in the illustrated example, and is not limited to the case where the elastic deformation is used to obtain the pressing force and at the same time the stepped portion can be overcome by the arc portion 91b. A coil spring is inserted between the telescopic shafts attached to the guide fixing member 50 to obtain a pressing force, and at the same time, it is possible to get over the stepped portion, and a roller is attached to the tip of the telescopic shaft that is expanded and contracted by the coil springs. It is also possible to reduce the friction during insertion.
In addition, the spring for obtaining the pressing force is not limited to the U-shaped spring 91 and the coil spring described above, and other springs such as a leaf spring can be used to apply the pressing force and get over the stepped portion. If so, the mechanism may be such, and it is preferable that the mechanism is simple since it is embedded in the filler 51 after insertion.

In the joint material fixing structure 1 configured as described above, for example, as shown in FIG. 4, the joint material 10 is arranged on the joint portions 32 of the caissons 31 and 31 so as to be orthogonal to the joint direction, and It is fixed between the end wall surfaces 31a, 31a via joint material mounting grooves 40, 40.
For fixing the joint material 10, necessary members such as the joint material 10, the guide fixing member 50, the elastic sealing material 60, the bag body 70, the friction reducing member 80, and the elastic pressing member 90 are transported to the construction site.
After that, the joint material 10 is set in a flat state, and 1 is attached to the attachment portion 12b of the secondary side displacement absorbing portion 11b at both ends in the width direction of the insertion tip portion (lower end portion) of the joint material 10 to the joint material attaching groove 40. The mounting portion 12a of the secondary side displacement absorbing portion 11a is overlapped, the elastic sealing material 60 is further stacked, and the intermediate portion 50b of the guide fixing member 50 is arranged back to back on the outside of the mounting portion 60a of the elastic sealing material 60, These are fixed with bolts and nuts 52 penetrating them.
An elastic pressing member 90 is attached to the guide fixing member 50 at least on the reaction force receiving portion 50d at the lower end. Further, a friction reducing member 80 is attached to the elastic sealing material 60 with a countersunk screw / nut 81. Further, the bag body 70 is attached to each guide fixing member 50.
Thereafter, the joint material 10 placed in a flat state is lifted by a lifting jig (not shown), and the tip portion (lower end portion) of the joint material 10 in an upright state is positioned on the joint portion 32 of the caisson 31.

  Thus, after the preparation for inserting the insertion tip portion of the joint material 10 is completed, the guide fixing member 50 is disposed on the joint material mounting groove 40, the displacement absorbing portion 11 in the middle portion of the joint material 10, and the opening 41. The joint material 10 is placed on the joint portion 32 so that the joint material 10 can be suspended from the joint portion 32.

After the joint material 10 is lifted and raised through the lifting jig in this manner, the joint material 10 that has been lifted is suspended, and the mounting portions 12 and 12 at both ends are placed in the spaces 42 and 42 of the joint material mounting grooves 40 and 40. The displacement absorbing portion 11 is positioned between the openings 41 and 41 and is suspended by using the weight of the guide fixing member 50 or the like, so that the joint is inserted into the joint material mounting groove 40 from the lower end of the joint material 10. To go.
When the joint material 10 is suspended and inserted through the guide fixing member 50, the elastic pressing member 90 hits the back surface of the space 42 of the joint material mounting groove 40, so that the guide fixing member 50 reacts with the reaction force receiving portion 50d. The friction reducing member 80 is inserted and attached in a state of being in contact with the inner surface of the opening 41 of the joint material mounting groove 40. At the time of this insertion, the elastic sealing material 60 is not directly in contact with the inner surface of the opening 41 of the joint material mounting groove 40, and the friction reducing member 80 is in contact, so that the friction can be reduced and inserted. Moreover, the generation of wrinkles in the elastic sealing material 60 can be suppressed.

In this state, with the most part of the first (tip) guide fixing member 50 of the joint material 10 inserted, the next guide fixing member 50 is connected by the bolt and nut 54 via the adjacent flange plate 53. In this case, the friction reducing member 80 is attached to the elastic sealing material 60, and the elastic pressing member 90 is attached to the reaction force receiving portion 50d of the guide fixing member 50 as necessary.
In this way, the shape of the attachment portions 12 and 12 of the joint material 10 is kept linear by the attachment of the guide fixing member 50, and the suspension material is repeatedly suspended while securing the suspension weight. The joint material 10 is inserted to the top end mark to which the joint material 10 is attached in advance.

Next, when the bag body 70 is not attached to the guide fixing member 50, a weight such as stone or sand is put into the bag body 70 and suspended between the front surface portion 50a and the reaction force receiving portion 50d of the guide fixing member 50. Insert it so that it is lowered.
Thereafter, the lifting jig is removed, one side of the bag body 70 is filled with the filling widening material 71, the bag body 70 is widened, and the sealing portion 60 b of the elastic sealing material 60 is connected to the inner surface of the opening 41 of the joint material mounting groove 40. The opening 41 is made into a sealed state by being elastically deformed so as to be pressed against. Similarly, the other bag body 70 sandwiching the joint material 10 is also filled with the filling widening material 71, the bag body 70 is widened, and the seal portion 60 b of the elastic seal material 60 is replaced with the opening 41 of the joint material mounting groove 40. The opening 41 is brought into a sealed state by being elastically deformed so as to be pressed against the inner surface.

Further, the guide fixing member 50 is fixed by filling the space 42 of the joint material mounting groove 40 with a filler 51 such as expansion mortar. The filler 51 welds not only the space 42 surrounded by the back surface portion 50c and the reaction force receiving portion 50d of the two guide fixing members 50 but also the flange plate 53 and the through hole 55 formed in the back surface portion 50c and the flange plate 53. It flows also into between the bag body 70 and the intermediate part 50b via a scallop for the purpose, and supports the bag body 70 from the outside.
Thereby, the outer side of the bag body 70 is reliably supported, and the elastic seal material 60 can be pressed against the inner surface of the opening 41 by the bag body 70 widened by the filling widening material 71 to be in a sealed state.

  Further, the filler holding member 61 is attached to the bottom edge portion of the elastic seal material 60, and the filler holding member 61 is spread over the bottom surface 45 of the joint material attaching groove 40, so that the joint material attaching groove 40 is It is possible to prevent and hold the filler 51 from flowing out from the bottom surface 45. Thereby, the sealing state by the elastic sealing material 60 can be further ensured.

By passing through such a process, the joint material 10 can be fixed to the joint material mounting groove 40. Then, the installation construction of one joint material 10 is completed by cutting the cutting part of the upper end part of the joint material 10, for example.
In addition, as illustrated in FIG. 3, it is necessary to provide the joint material 10 at one place or a plurality of places for one joint portion 32, and the joint material fixing structure 1 is applied to each joint. What is necessary is just to construct the material 10 (10A, 10B).
In the fixing structure 1 using the plate-shaped joint material 10A as the joint material 10 as described above, the joint material 10A from the joint portion 32 between the caissons 31 and 31 is absorbed by the primary side displacement absorbing portion 11a with respect to the level 1 earthquake motion. Leakage of waste and retained water can be prevented.
In addition, the joint material 10A with respect to the level 2 seismic motion causes the waste and retained water in the sea surface waste disposal site to remain even if the structure (the revetment) itself such as the caissons 31 and 31 is deformed by the secondary displacement absorbing portion 11b. It is possible to prevent leakage (outflow or leaching) from the joint portion 32 to the outside.
Further, since the joint material 10 is pressed against the inner surface of the opening 41 of the joint material mounting groove 40, and the bag body 70 and the filler 51 are filled in the space 42 without a gap, the joint material 10 is subjected to an earthquake or the like. Even when a tensile force is applied, the attachment portion 12 does not move in the joint material attachment groove 40, and the sealed state can be maintained.
Thereby, the sealing state of the inner surface of the opening 41 of the joint material mounting groove 40 can be ensured, and a flow that wraps around the joint material mounting groove 40 can be prevented to ensure a sealed state.

In the joint material fixing structure 1 described above, the case where the plate joint material 10A is used has been described as an example. However, in the case of the cylindrical joint material 10B shown in FIG. 10, the cylindrical portion 11c is crushed. The cylindrical joint material 10 </ b> B is fixed to the joint material mounting groove 40 through the same process as the joint material fixing structure 1 described above.
Thereafter, the filling material 13 such as asphalt mastic is filled inside the cylindrical portion 11c of the cylindrical joint material 10B and spreads, so that the water-impervious state is in contact with the wife wall surfaces 31a and 31a on both sides of the joint portion 32 (this The filling of the filling material 13 is carried out after filling until the caisson 31, 31 is stabilized).
When two joint materials 10 are provided adjacent to each other, a water shielding material such as asphalt mastic is inserted between the joint materials 10 to ensure a more complete water shielding state.
In the state where the cylindrical joint material 10B is fixed in this way, for example, when the caissons 31 and 31 are displaced due to an earthquake or the like and the interval between the joint portions 32 is widened, the cylindrical portion 11c of the joint material 10 is spread so as to be pulled out. Maintain water shielding.
Further, when the caissons 31 and 31 are displaced due to an earthquake or the like and the interval between the joint portions 32 is widened and at the same time shifts forward and backward, the cylindrical portion 11c of the cylindrical joint material 10B is spread so as to be pulled out obliquely. The water shielding condition is maintained.

As described above in detail with the embodiment, according to the joint material fixing structure 1 of the present invention, the joint material 10 having the attachment portions 12 at both ends and the joint portion 32 of the caisson (structure) 31 are provided. A joint material mounting groove 40 provided in the vertical direction with the slit-shaped opening 41 interposed therebetween, and a guide fixing member 50 that is mounted on both sides of the mounting portion 12 and guides the insertion of the joint material 10 into the joint material mounting groove 40. The mounting portions 12 at both ends are disposed in the joint material mounting groove 40 and are embedded and fixed in the filler 51 to be filled, and are fixed to the joint portion 32 through the opening 41. In the fixing structure 1 of the joint material 10 in which the displacement absorbing portion 11 is arranged, an elastic sealing material 60 attached to the attachment portion 12 and applied to the inner surface of the opening portion 41 to seal the opening portion 41, and the joint material attachment groove 40 Placed in the filling A bag body 70 that is widened by filling the width material 71 and presses the elastic sealing material 60 against the inner surface of the opening 41. Therefore, the elastic sealing material 60 is pressed by the bag body 70 widened by the filling widening material 71. Thus, the inner surface of the opening 41 can be sealed, and the joint material 10 can be fixed without causing a gap in the inner surface of the opening 41.
Thereby, the water shielding performance requested | required of the joint part 32 of the caisson (structure) 31 is securable.
Further, since the joint material 10 can be fixed without causing a gap in the inner surface of the opening 41, the guide fixing member 50 moves through the joint material 10 even if a tensile tension acts on the joint material 10, and the guide is fixed. The filling material 51 that fixes the member 50 is not crushed and a water channel is not generated, and the sealing state of the inner surface of the opening 41 of the joint material mounting groove 40 can be maintained.

  According to the joint material fixing structure 1 of the present invention, the elastic seal material 60 reduces the friction between the elastic seal material 60 and the inner surface of the opening 41 when mounted in the joint material mounting groove 40. Since the member 80 is provided, the friction reducing member 80 outside the elastic sealing material 60 can reduce the friction with the inner surface of the opening 41 of the joint material mounting groove 40 and the elastic sealing material 60 can be inserted. Further, by attaching the elastic sealing material 60 to the inner surface of the opening 41 of the joint material mounting groove 40 without being caught by the friction reducing member 80, it is possible to prevent the occurrence of wrinkles due to the dead weight of the elastic sealing material 60. Thereby, the water-blocking property by the elastic sealing material 60 can be improved further.

  According to the joint material fixing structure 1 of the present invention, the friction reducing member 80 includes the inclined surface 82 at the lower end portion on the inner surface side of the opening 41, so that the inner surface of the opening 41 of the joint material mounting groove 40 is provided on the inner surface. Even if there is a stepped portion due to welding or the like, the friction reducing member 80 can get over and be inserted without being caught. Thereby, compared with the prior art which attaches a guide plate to the joint material mounting groove 40 in advance, the insertion is not difficult, and the joint material 10 can be easily inserted.

  According to the joint material fixing structure 1 of the present invention, the guide fixing member 50 includes the reaction force receiving portion 50d that receives the reaction force due to the widening of the bag body 70 and presses the elastic seal material 60. Can be inserted into a narrow space and widened, and by supporting the reaction force against the reaction force receiving portion 50d, an elastic sealing material can be used by effectively utilizing the pressing force by the filling widening material 71 of the bag body 70. 60 can be transformed into a sealed state. Accordingly, the elastic sealing material 60 can be pressed and sealed with a large pressing force, and the amount of filling of the filling widening material 71 can be suppressed to ensure the water shielding performance.

  According to the joint material fixing structure 1 of the present invention, the guide fixing member 50 is pressed at least at the lower end portion against the inner surface of the joint material mounting groove 40 and presses the guide fixing member 50 against the inner surface side of the opening 41. Since the elastic pressing member 90 is provided, the joint fixing member 50 is pressed by the elastic pressing member 90 to bring the friction reducing member 80 into contact with the inner surface of the opening 41 (predetermined state). 10 can be inserted. Thereby, there is no need to adjust the position when the guide fixing member 50 is inserted or after the insertion, and when the insertion is completed, the joint material 10 and the like are in a predetermined state with respect to the joint material mounting groove 40.

  According to the joint material fixing structure 1 of the present invention, the elastic pressing member 90 is bent into a U-shape, one end thereof is fixed to the guide fixing member 50, the middle portion is brought into contact with the joint material mounting groove 40, and the like. Since the end portion is provided in an open state, the elastic pressing member 90 can be easily prepared by using, for example, the U-shaped bolt 91, and the U-shaped bolt 91 allows the friction reducing member 80 to be connected to the opening 41. The joint material 10 can be reliably inserted in a state of contacting the inner surface (predetermined state).

  According to the joint material fixing structure 1 of the present invention, when the elastic sealing material 60 is mounted in the joint material mounting groove 40, the friction reducing member 80 does not contact the inner surface of the opening 41 and the friction reducing member 80 is opened. Is formed in a shape that is deformed by the widening of the bag body 70 and contacts the inner surface of the opening 41, so that the opening of the joint material mounting groove 40 is formed by the friction reducing member 80 outside the elastic seal material 60. The elastic seal material 60 can be inserted with the friction with the inner surface of the portion 41 reduced by half, and the elastic seal material 60 is attached to the inner surface of the opening 41 of the joint material mounting groove 40 by the pressing force accompanying the widening of the bag body 70. It is possible to achieve both the ease of insertion and reliable water shielding.

  According to the joint material fixing structure 1 of the present invention, the guide fixing member 50 includes the through-hole 55 through which the filler 51 filled in the joint material mounting groove 40 flows. The space 51 can be filled with the filler 51 without a gap, and the bag body 70 can be supported and the guide fixing member 50 can be reliably fixed. Thereby, the joint material 10 can be fixed in a stable state by preventing the crushing of the filler 51 due to the generation of play, and water impermeability can be ensured.

  According to the joint material fixing structure 1 of the present invention, the elastic seal material 60 is provided at the lower end portion and spreads at the bottom surface 45 of the joint material mounting groove 40 to prevent the filler material 51 from flowing out and hold it. Since the holding member 61 is provided, leakage of the filler 51 at the bottom surface 45 of the joint material mounting groove 40 can be prevented, and the water shielding from the bottom surface 45 at the joint material mounting groove 40 can be further improved and ensured. Can be water-blocked.

  According to the joint material fixing structure 1 of the present invention, the filler holding member 61 is configured by mounting and fixing the upper end edge to the recess 62 formed in the elastic seal material 60. When the elastic sealing material 60 is inserted, the filler holding member 61 can automatically spread on the bottom surface 45 to hold the filler 51. The guide fixing member 50 and the joint material 10 can be reliably fixed.

  Further, according to the joint material fixing structure 1 of the present invention, it is not necessary to work the joint material 10 by entering the joint portion 32 of the caisson 31 which is a structure. Can be fixed.

  In the above embodiment, the two types of joint materials 10A and 10B have been described as an example. However, the shape of the joint material 10 is provided with the mounting portions 12 at both ends, and the displacement absorption that can follow these in the middle by connecting them. Any shape and material may be used as long as the portion 11 is provided.

  Moreover, in the said embodiment, although demonstrated by the case where it applies to the joint material 10 fixed to the joint part 32 of the caisson 31, it can apply similarly to the joint part of not only the caisson 31 but another structure. . Further, the caisson 31 can be widely applied not only to the joint portion 32 of the caisson 31 of the management-type revetment but also to the joint portion 32 such as the caisson 31 of other uses.

DESCRIPTION OF SYMBOLS 1 Fixing structure of joint material 10 Joint material 10A Plate-shaped joint material 10B Cylindrical joint material 11 Displacement absorption part 11a Primary side displacement absorption part 11b Secondary side displacement absorption part 11c Cylindrical part 12 Attachment part 12a Attachment part 12b Attachment part 13 Filling material 30 Management-type revetment 31 Caisson (structure)
31a Wife wall 32 Joint part 33 Rubble mound 34 Asphalt mat 35 Sealing material 36 Joint part water shielding material 37 Water shielding sheet 38 Asphalt mastic 39 Trench part (deep mixing treatment)
40 Joint material mounting groove 41 Opening portion 42 Space 43 Frame body 44 Plate member 44a Step portion 45 Bottom surface 50 Guide fixing member 50a Front surface portion 50b Intermediate portion 50c Back surface portion 50d Reaction force receiving portion 50e Through hole 51 Filler 52 Bolt / nut 53 Flange Plate 54 Bolt / Nut 55 Through-hole 60 Elastic sealing material 60a Mounting portion 60b Sealing portion 61 Filling material holding member 62 Recess 70 Bag body 71 Filling widening material 80 Friction reducing member 81 Flat head screw / nut 82 Inclined surface 90 Elastic pressing member 91 U Letter spring (U-bolt)
91a End portion 91b Arc portion 92 Nut S Sea side E Landfill side

Claims (10)

A joint material having attachment portions at both ends;
A joint material mounting groove provided in a vertical direction across the joint part of the structure and provided with a slit-shaped opening;
A guide fixing member that is attached to both sides of the mounting portion and guides the insertion of the joint material into the joint material mounting groove,
The mounting portions at both ends are disposed in the filler material filling groove and are embedded and fixed in the guide fixing member, and a displacement absorbing portion is disposed at the joint portion through the opening. It is a fixing structure of joint material,
An elastic sealing material attached to the attachment portion and applied to the inner surface of the opening to seal the opening;
A bag body arranged in the joint material mounting groove and widened by filling with a filling widening material to press the elastic sealing material against the inner surface of the opening,
A fixing structure of joint material characterized by that. The elastic sealing material includes a friction reducing member that reduces friction between the elastic sealing material and the inner surface of the opening when being mounted in the joint material mounting groove.
The joint material fixing structure according to claim 1. The friction reducing member includes an inclined surface at a lower end portion on the inner surface side of the opening.
The joint material fixing structure according to claim 2, wherein: The guide fixing member includes a reaction force receiving portion that receives the reaction force due to the widening of the bag body and presses the elastic sealing material.
The joint material fixing structure according to any one of claims 1 to 3. The guide fixing member includes an elastic pressing member that abuts on the inner surface of the joint material mounting groove and applies a pressing force that presses the guide fixing member against the inner surface side of the opening, at least at the lower end.
The joint material fixing structure according to claim 1, wherein the joint material is fixed. The elastic pressing member is bent in a U-shape and fixed at one end to the guide fixing member, the intermediate portion is abutted against the joint material mounting groove, and the other end is provided in an open state.
The joint material fixing structure according to claim 5. When the elastic sealing material is mounted in the joint material mounting groove, the friction reducing member does not contact the inner surface of the opening without contacting the inner surface of the opening, and deforms due to the widening of the bag body. Formed in a shape that comes into contact with the inner surface of the opening,
The joint material fixing structure according to claim 2, wherein the joint material is fixed. The guide fixing member includes a through hole through which the filler filled in the joint material mounting groove flows.
The joint material fixing structure according to claim 1, wherein the joint material is fixed. The elastic sealing material includes a string-like filler holding member that is provided at a lower end portion and spreads at a bottom surface of the joint material mounting groove to prevent and hold out the filler.
The joint structure for fixing a joint material according to any one of claims 1 to 8. The filler holding member is configured by attaching and fixing an upper end edge to a recess formed in the elastic seal material.
The joint material fixing structure according to claim 9.

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