JP2898938B2 - Joint structure for caisson, its construction method and joint material for caisson - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint formed between end faces of caissons arranged adjacent to each other when a caisson made of concrete or steel is used for forming a dike or the like. The present invention relates to a joint structure using a joint material provided, a construction method thereof, and a joint material used for the joint structure.

[0002]

2. Description of the Related Art Conventionally, when a caisson is newly constructed, a joint material consisting of a cylindrical bag formed in advance of a deformable material such as rubber or synthetic resin is attached to one end face of a caisson to be arranged adjacently. Crush it in a flat state and fix it with a caul plate, bolts, etc., and then transport this caisson to a construction site such as a dike, install it in a predetermined position, and fill a bag-like joint material with asphalt mastic etc. The joint material is inflated by filling the joint, and the joint between the caissons is closed to perform sealing.

When the caisson is newly installed, the conventional caisson joint material is fixed to the caisson with sufficient strength before the caisson is transported to the site and installed. The joint material does not move due to the pressing force of the above, and the function of the joint material can be exhibited. However, when the joint material is attached to an existing caisson, the joint width between adjacent caissons is, for example, about 20 to 30 cm. It is impossible or extremely difficult for a worker to enter this joint and attach the joint material to the end face of one caisson, and the joint material can be attached to the end face of the caisson. Even if it is not firmly fixed with sufficient strength, it will not be fixed due to the pressing force of waves or earth and sand after installation, and the joint material will move, and the function of the joint material will be sufficient. There is a problem that Succoth can not.

Accordingly, the present applicant has filed Japanese Patent Application No. 8-1411.
According to No. 04, even when laying between existing caissons, it can be easily and sufficiently attached to the end face of the caisson, and after the installation, the joint material does not move due to waves and earth and sand, and the function of the joint material is fully performed A joint structure for caisson that can be fulfilled is proposed.

[0005] The joint structure for caisson is a joint material vertically arranged between the end faces of the caisson arranged adjacent to each other, the joint material body made of a deformable material such as rubber or synthetic resin, An anchoring portion provided on at least one side of the joint material main body so as to extend in the longitudinal direction of the joint material main body, extends over the entire length thereof, and further includes a projecting lower end portion projecting downward from a lower end of the joint material main body. An anchoring portion having an anchoring portion having a rigid member having the anchoring portion is disposed on an end surface of one of the caissons, and a projecting lower end portion of the rigid member is cast into the ground at the bottom of the water, The joint member is fixed to the end face of the one caisson by fixing the upper end of the rigid member to a fixing member fixed to the top of the caisson.

According to this joint structure, the anchoring portion is disposed on the end face of the caisson, and the lower end of the rigid member is driven into the ground at the bottom of the water by hitting the upper end of the rigid member. Then, if necessary, the projecting upper end is cut off, and the joint member can be fixed to the end face of the caisson by fixing the upper end of the rigid member to a fixing member fixed to the top of the caisson.

[0007]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Application No. 8-141 is disclosed.
The joint material used in the joint structure for caissons according to No. 104 has a relatively long rigid member made of CT steel or the like fixed over the entire length of the joint material body made of a flexible material such as rubber or synthetic resin. When the joint material is hung by a crane in the joint between caissons, and the distance between the pair of right and left rigid members is not always constant when positioning along the end face of one caisson, the pair of rigid members It has been found that, depending on the positional relationship between them, the joint material main body may be bent in the longitudinal direction and the width direction, or may be expanded or contracted, and may not be accurately positioned on the end face of one caisson.

Further, when the joint material is hung down in the joint between caissons by a crane, the joint material is inclined by the influence of wave pressure or the like, and the joint material is hung vertically to be accurately placed on the end face of the caisson. It has been found that positioning is sometimes difficult.

The present invention has been made in view of the above-mentioned problems of the joint structure for caisson according to Japanese Patent Application No. 8-141104, and is characterized in that when a joint material is suspended by a crane between joints between caissons, a rigid member is used. The joint material body does not bend or widen or shrink in the longitudinal direction and the width direction due to the positional relationship between them, and the vertical hanging of the joint material is not hindered even under the influence of wave pressure etc. It is another object of the present invention to provide a joint structure for caisson in which the joint material can be accurately positioned on the end face of one caisson.

[0010]

According to a first aspect of the present invention, there is provided a joint structure for a caisson, which is a joint material vertically disposed between end faces of adjacent caissons. A joint material main body made of a deformable material such as rubber or synthetic resin, and an anchoring portion provided on both sides of the joint material main body so as to extend in the longitudinal direction of the joint material main body and extending over the entire length thereof. Further, a pair of rigid members having a protruding lower end projecting downward from a lower end of the joint material main body, and a longitudinal direction of the pair of rigid members such that an interval between the pair of rigid members is maintained at equal intervals over the entire length thereof. An anchoring portion including a rigid member fixing member that fixes the pair of rigid members to each other at a plurality of locations in the joint member is disposed on an end surface of one caisson,
The projecting lower end of the rigid member is cast into the ground at the bottom of the water, and the upper end of the rigid member is fixed to a fixing member fixed to the top of the caisson so that the joint material is an end surface of the one caisson. It is characterized by being fixed to.

According to a second aspect of the present invention, in the joint structure for caisson, a suspending member locking member for locking the joint material suspending operation suspending member is attached to the pair of rigid members. It is characterized by.

According to a third aspect of the present invention, the joint structure for a caisson is a hollow cylindrical body having an opening for filling a filler at an upper end, and the anchoring portion is a cylindrical body. It is characterized by comprising a flange portion extending laterally from the back side of the body, and the rigid member fixed to the flange portion.

According to a fourth aspect of the present invention, in the joint structure for caisson, the joint material main body is provided at a lower end of the cylindrical body so that a bag-shaped member is integrally fitted to the hollow portion in a recessed state. It is characterized in that a swelling permitting portion for allowing the bag-shaped member to swell to the front side is formed at a front lower edge portion of the cylindrical body.

According to a fifth aspect of the present invention, there is provided a method of constructing a joint material for caisson, wherein the joint material is vertically disposed between the end faces of the caissons arranged adjacent to each other, and the deformation of rubber, synthetic resin or the like is performed. A joint material body made of a possible material, and an anchoring portion provided on both sides of the joint material body so as to extend in the longitudinal direction of the joint material body, extending over the entire length thereof, and further extending from the lower end of the joint material body. A pair of rigid members having a protruding lower end protruding downward and a protruding upper end protruding upward from the upper end of the joint material main body, and the pair of rigid members being maintained at equal intervals over the entire length thereof. An anchoring portion including a rigid member fixing member for mutually fixing the pair of rigid members at a plurality of locations in the longitudinal direction of the rigid member, and a joint material suspending operation suspension attached to the pair of rigid members. Tension is locked A joint member provided with a suspending member locking member which is vertically suspended while operating the joint member suspending operation suspending member locked by the suspending member locking member. After being arranged on the end face of one caisson and hitting the projecting upper end of the rigid member to drive the projecting lower end of the rigid member into the ground at the bottom of the water, the upper end of the rigid member is The joint material is fixed to an end surface of the one caisson by being fixed to a fixing member fixed to the top.

According to a sixth aspect of the present invention, a joint material for caisson is a joint material vertically disposed between end faces of adjacently arranged caissons, and is a deformable material such as rubber or synthetic resin. And an anchoring portion provided on both sides of the joint material body so as to extend in the longitudinal direction of the joint material body, extending over the entire length thereof, and further projecting downward from the lower end of the joint material body. And a pair of rigid members having a protruding lower end and a protruding upper end protruding upward from the upper end of the joint material main body, and the distance between the pair of rigid members being maintained at equal intervals over the entire length thereof. And an anchoring portion having a rigid member fixing member for mutually fixing the pair of rigid members at a plurality of locations in the longitudinal direction.

According to a seventh aspect of the present invention, in the caisson joint material, a suspender engaging member for engaging the joint material suspending operation suspender is attached to the pair of rigid members. And

The joint material for caisson according to the invention of claim 8 is such that the joint material main body is a hollow cylinder having an opening for filling filler at an upper end, and the anchoring portion is formed of the cylinder. It is characterized by comprising a flange portion extending laterally from the back side of the body, and the rigid member fixed to the flange portion.

According to a ninth aspect of the invention, there is provided a joint material for caisson, wherein the joint material main body is provided at a lower end of the cylindrical body so that a bag-like member is integrally fitted in a hollow shape in a concave state. It is characterized in that a swelling permitting portion for allowing the bag-shaped member to swell to the front side is formed at a front lower edge portion of the cylindrical body.

[0019]

According to the first, fifth and sixth aspects of the present invention, in addition to the configuration of the caisson joint material according to Japanese Patent Application No. 8-141104, at a plurality of locations in the longitudinal direction of the pair of rigid members. Since the rigid member fixing member for fixing the pair of rigid members to each other is provided in the anchoring portion, the interval between the pair of rigid members is maintained at equal intervals over the entire length thereof. It is possible to prevent the joint material main body from being bent in the longitudinal direction and the width direction, or from being expanded or contracted when being suspended between joints.

According to the second, fifth and seventh aspects of the present invention, since the suspension member is attached to the pair of rigid members, the joint member is attached to the suspension member. Even if the joints are suspended by the crane, the joints may be inclined by the influence of wave pressure or the like when the joints are suspended by the crane. By operating the joint on both sides, the joint material can be turned upright and vertically suspended, and the joint material can be accurately positioned on the end face of the caisson.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a joint structure according to the present invention, FIG. 2 is a perspective view showing a joint material used in the joint structure, FIG. 3 is a rear view of the joint material, and FIG. FIG. 5 is a sectional view taken along the line AA of FIG. 2, FIG. 6 is a sectional view taken along the line BB of FIG. 2, and FIG. 7 is a front view showing an example of a suspension member locking member. In the embodiment of FIGS. 1 to 7, a bag-like member is integrally joined to a lower end of a cylindrical joint material main body in a concavely fitted state in a hollow portion, and a bag-like member is attached to a front edge of a lower end of the cylindrical body. This is applied to the case where a joint material having a swellable portion for allowing swelling to the front side is used.

First, the joint material used in the present embodiment will be described. The joint material 10 for caisson shown is made of a flexible and deformable material such as synthetic rubber or synthetic resin, and is separated from a cylinder having a predetermined thickness by a predetermined distance in parallel such that the cylinder is crushed in the radial direction. The main body 11 as a cylindrical joint material main body is formed in a shape in which both sides of the plate 11A and the back plate 11B are connected in an arc shape, and the back plate 11B extends left and right on both sides on the back side. As described above, the plate-shaped mounting flange 12 is formed so as to protrude with a predetermined width. The length of the joint material 10 is set substantially equal in the longitudinal direction of the caisson. A reinforcing cloth is embedded in the cylindrical main body 11 as necessary. The main body 11 has an opening for filling filler at the upper end.

At the lower end of the main body 11, an inner bag 13 as a bag-like member is provided so as to be joined and integrated into the hollow portion thereof, and the lower end opening is closed by the inner bag 13. ing.

The inner bag 13 has a tapered shape having a predetermined depth and is formed of a material having flexibility as in the case of the main body 11, and its opening edge is joined to the lower end opening edge of the main body 11. It is provided. The inner bag 13 and the main body 11 may be formed separately and then joined, or may be formed integrally.

A cutout portion 14 is formed at the lower edge of the front side of the main body portion 11 (the side that comes into contact with an adjacent caisson) as a swellable portion.

The notch 14 is formed by cutting the front surface of the main body 11 into a rectangle having a width of the front plate 11A and a predetermined depth in the longitudinal direction, and also cutting the inner bag 13 into a corresponding shape. The main body 11 and the inner bag 13
4 are joined at the edge.

A plate-like member 16 made of CT steel constituting a rigid member according to the present invention is fixed to the front surface of each mounting flange 12 by a method described later. The plate-like member 16 extends over the entire length of the mounting flange 12, and further has a protruding lower end 16 a protruding downward from the lower end of the main body 11 and a main body 11.
Has a protruding upper end portion 16b that protrudes upward from the upper end of the upper end.
The mounting flange 12 and the plate-like member 16 as a rigid member constitute an anchoring portion 19 in the present invention.

In this embodiment, the plate-like member 16 made of CT steel has flanges 16d on both sides of the projecting portion 16c as shown in the sectional view of FIG. A pair of right and left holding plates 17 made of a steel plate or the like is disposed at a position corresponding to the portion 16d. A bolt insertion hole 18 penetrating the holding plate 17, the mounting flange 12, and the flange portion 16d of the plate-like member is formed at predetermined intervals in the longitudinal direction, and the holding plate 17, the mounting flange 12, and the plate-like member are formed. The flange portions 16d are fixed to each other by tightening a countersunk bolt 22 inserted into the bolt insertion hole 18 and a cap nut 23 screwed to the countersunk bolt 22.

Pressing plate 17 corresponding to a pair of plate members 16
Fixing bars 27 and 28 constituting rigid member fixing members are provided between the presser plates 17 adjacent to each other at a middle interval at two upper and lower positions in the longitudinal direction of the plate member 16.
The fixing bars 27, 28 are welded to the side walls of the holding plate 17, as shown in FIG. 3. The holding plate 17 and the fixing bars 27 and 28 form the same plane. The pair of plate-like members 16 are fixed to each other by fixing bars 27 and 28 such that the distance between the pair of plate-like members 16 is maintained at equal intervals over the entire length. The method of fixing the fixing bars 27 and 28 to the holding plate 17 is not limited to welding, but may be another method such as fixing the holding bars 27 and 28 to the holding plate 17 using a flat head bolt 22. Further, the rigid member fixing member is not limited to the plate-like shape of the fixing bars 27 and 28 shown in the figure, and may be a member having another shape such as a round bar or a square bar. Further, the arrangement location is not limited to two places but may be three or more places.

Suspension member locking members 29 to which suspension members such as joint material hanging operation ropes and rods are locked to each plate-like member 16.
(In this case, the position is slightly lower than the center, but the position and the number of the components are not limited to this.). In the illustrated example, the suspension member locking member 29 has a countersunk bolt insertion hole 29a formed at one end of the plate piece and a locking hole 29b of the joint material hanging operation suspension tool formed at the other end. Have been. The suspending member locking member 29 is disposed at the upper end of the flange 16 d outside the plate member 16 in a direction orthogonal to the plate member 16, and the countersunk bolt 22 is inserted through the countersunk bolt insertion hole 29 a and the cap nut 23. As a result, the suspending member locking member 29 is formed in a plate shape such that the end having the joint member suspending operation suspending member locking hole 29 b projects outward from the joint flange 12. It is fixed to the member 16. The shape of the suspension member locking member 29 is not limited to the illustrated example, and the mounting method thereof may be, for example, the plate-like member 1.
6, other methods such as welding.

Next, a method of constructing the caisson joint structure of this embodiment using the joint material will be described with reference to FIGS.

A suspending member (not shown) for suspending the joint material is inserted into the hole 29b of the suspending member locking member 29 to be locked, and is arranged along one end face of the existing caisson arranged adjacently. The joint material 10 is suspended by a crane and arranged in a vertical direction. At this time, since the pair of plate-like members 16 are fixed to each other by the fixing bars 27 and 28, the joint material 10 is prevented from being bent in the longitudinal direction and the width direction, or from being expanded or contracted.

Even if the joint member 10 hung by the crane is rocked and tilted due to the influence of the wave pressure or the like, the operator pulls the operation suspender on both sides of the joint member 10 on the caisson. By operating the joint member 10, the posture of the joint member 10 can be regained, and the joint member 10 can be vertically hung vertically to be accurately positioned on the end face of the caisson.

In this way, the joint material 10 is positioned along the end face of one caisson, and each projecting lower end 1
6a is contacted to the bottom of the water, and the upper end 1
By hitting 6b with a vibrohammer, each projecting lower end 16a of the plate-like member 16 is driven into the ground at the bottom of the water until the lower end of the mounting flange 12 contacts the bottom of the water. Next, each protruding upper end is cut on the same plane as the upper end edge of the mounting flange 12. Of course, in some cases, it may not be cut.

Next, a pair of fixing plates 2 constituting the fixing member of the present invention is provided on the top 1a of the caisson 1 on which the joint structure is constructed.
4 is arranged. The fixing plate 24 includes a rectangular caisson fixing portion 24a and a joint material fixing portion 24b protruding from one side of the caisson fixing portion 24a.
b of the plate-like member 16 after cutting the upper end 16b.
Fixed plate 2 so as to cover the upper end surface of the flange portion 16d.
After welding the joint material fixing portion 24b of the fixing plate 24 and the upper end surface of the flange portion 16d of the plate-like member 16, each fixing plate 24 is fixed to the caisson top 1a by the anchor bolt 25.
Fixed to.

In this manner, the joint material 10 is formed by the projecting lower end 16a of the plate-like member 16 cast in the ground at the bottom of the water and the upper end of the plate-like member 16 fixed to the fixing plate 24 fixed to the caisson top 1a. The upper and lower parts of the caisson 1 can be firmly attached to the end face of the caisson 1. It is sufficient for the worker to work at the top of the caisson, and the worker enters the narrow joint between adjacent caissons and attaches the joint material 10. Since there is no need to perform the work, the work of attaching the joint material can be easily and completely performed in the existing caisson.

In the above embodiment, the plate member 16 made of CT steel is used as the rigid member. However, the rigid member is not limited to CT steel, but may be other rigid plates such as H steel, flat steel, and other bar steel. May be used. The holding plate 17 is the anchoring portion 1
9 may be composed of a single member over the entire length, or may be divided into a plurality of parts.

In the above embodiment, the plate-like member 16 is
7, the plate flange 22 is fixed to the mounting flange 12 using the cap nut 23. However, the method of fixing the plate-shaped member to the mounting flange is not limited to this. Other fixing methods such as attaching (in this case, the holding plate 17 is unnecessary) may be used.

In the above-described embodiment, the fixing plate 24 as a fixing member is fixed to the plate-like member 16 by welding to the upper end surface, but the upper end of the plate-like member is fixed to the fixing member. The method is not limited to this. For example, the tip of the joint material fixing portion 24b of the fixing plate 24 is bent downward at a right angle, and the hanging portion formed by this is fastened to the upper end of the plate member 16 with a bolt. Alternatively, it may be fixed by another method.

Further, the joint material main body is not limited to the above embodiment, and the present invention can be applied to various cylindrical joint materials other than those shown in FIG.

After the joint member 10 is attached to the caisson 1 as described above, the hollow portion of the main body 11 is filled with a filler 20 such as coarse sand or asphalt mastic from the upper end opening as shown in FIG. As a result, the main body 11 bulges in a circular direction due to the filling pressure of the filler 20, and the front surface thereof is pressed against the end surface of the adjacent caisson 2 to be in close contact therewith.

As shown in FIG. 8, the inner bag 13 is also pressed by the filler 20 and turned upside down to be pushed downward from the lower end of the main body 11 and forward from the notch 14 on the front surface of the lower end. It bulges out and comes into close contact with the upper surface of the cobblestone of the foundation 3 and the end surface of the adjacent caisson 2.

After the construction, the foundation and the ground are tightened,
When the caisson 1 adjacent to the caisson 1 to which the joint material 10 is attached (the caisson 2 to which the joint material 10 is pressed) is relatively displaced to the side where the joint width is widened due to vibration, displacement due to waves, extrusion by earth pressure, or the like. As shown in FIG. 9, the main body 11 expands due to the pressure of the filler 20 and widens as shown in FIG. At the underground end of the eye, not only the swelling of the inner bag 13 downward but also the swelling of the inner bag 13 to the front side via the cutout portion 14 prevents generation of a gap with the foundation 3. Even when the caisson 1 and 2 are displaced in the vertical direction, the inner bag 13 bulges forward through the notch portion 14 to flexibly correspond to the step of the foundation 3 and maintain a close contact state. can do. Therefore, no gap is formed at the lower end of the joint, and it is possible to prevent flooding and outflow of the filling material from the formed gap.

Next, another example of the main body of the joint material used in the joint structure of the present invention will be described with reference to the overall perspective view of FIG. The parts having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The illustrated joint material 10 'is provided with an inner bag 13 at the lower end of the main body 11 as in the above-described embodiment, and the main body 11 is extended to the lower end without being cut off. A folded portion 15 is formed at the front side edge corresponding to the notch 13A. That is, the main body 11
The lower edge of the inner bag 13 is formed horizontally, but the lower edge of the front side of the inner bag 13 is cut out upward and joined to the main body 11 at the lower edge. The folding part 15 is formed in the main body part 11 located on the front side.

That is, in the present configuration, the notch 13A of the inner bag 13 and the folded portion 15 of the main body 11 constitute a bulging-allowing portion, and the main body 11 located in front of the notch 13A of the inner bag 13 is formed. The folding part 15 constitutes a protection member.

The folded portion 15 is formed by forming a plurality of folds 15A along the longitudinal direction at predetermined intervals on the front plate 11A of the main body 11.

The fold 15A has an inward wedge-shaped cross-section, has a length corresponding to the notch 13A of the inner bag 13 in the longitudinal direction of the joint material 10, and has the largest width at the lower end and the maximum penetration amount. , The cross-sectional shape becomes smaller as going upward.

The folded portion 15 having the above configuration can be easily expanded and deformed by expanding the fold 15A. As a result, it does not prevent the inner bag 13 from bulging forward.
It does not impair the ability of the inner bag 13 to follow the gap formed at the lower end of the joint, and acts to cover and protect the front side of the inner bag 13. In addition, from the viewpoint of protection of the inner bag 13, the folded portion 15 may be any as long as it can cover the front surface of the inner bag 13 without being continuous with the main body 11.
Further, the shape of the fold 15A is not limited to this, and the inner bag 1
What is necessary is just to be able to allow the bulging of No.3.

The joint material 10 'of this configuration is also similar to the above-described embodiment, and after the construction, coarse sand and asphalt mastic are inserted into the hollow portion of the main body 11 from the upper end opening as shown in FIG. The main body 11 bulges in a circular direction by the filling pressure of the filler 20, and the front surface of the main body 11 is pressed against the end face of the adjacent caisson 2 to be in close contact therewith. As shown in FIG. 12, the inner bag 13 is also inverted by being pressed by the filler 20, is pushed out from the lower end of the main body 11, is pressed against the upper surface of the foundation 3, and is in close contact therewith. The fold 15 is pushed forward and pressed against the end face of the adjacent caisson 2.

FIG. 5 is a longitudinal sectional view showing a case where the adjacent caissons 1 and 2 are relatively displaced due to tightening of the foundation and the ground, subsidence, vibration due to waves, displacement, extrusion due to earth pressure, etc., and the joint width is widened. As shown in FIG. 13, the main body 11 expands and expands due to the pressure of the filler 20, and prevents the formation of a gap as shown in FIG. 14 which is a longitudinal sectional view. At the basement end of the eye, the inner bag 13 bulges downward and the notch 13
A diameter of the folded part 15 caused by the inner bag 13 bulging forward through A prevents a gap from being formed between the folded part 15 and the foundation 3, and a relative displacement in the vertical direction occurs between the caisson 1 and 2. In this case, the contact state is maintained flexibly in accordance with the step of the foundation 3. For this reason, it is possible to prevent infiltration and outflow of the filling material inside without causing a void, and to prevent the inner bag 1
Since the front surface of the inner bag 3 is covered with the folded portion 15, there is no risk of the inner bag 13 being damaged, and the durability can be increased.

[0052]

As described above, according to the first, fifth and sixth aspects of the present invention, in addition to the configuration of the caisson joint material according to Japanese Patent Application No. 8-141104, a pair of rigid members is provided. Since the rigid member fixing members for fixing the pair of rigid members to each other at a plurality of locations in the longitudinal direction of the pair are provided in the anchoring portion, the intervals between the pair of rigid members are maintained at equal intervals over the entire length. Therefore, when the joint material is hung between the joints of the caisson, the joint material main body can be prevented from being bent in the longitudinal direction and the width direction, or from being expanded or contracted.

According to the second, fifth and seventh aspects of the present invention, since the suspending member locking member is attached to the pair of rigid members, the joint member is attached to the suspending member locking member. Even if the joints are suspended by the crane, the joints may be inclined by the influence of wave pressure or the like when the joints are suspended by the crane. By operating the joint on both sides, the joint material can be turned upright and vertically suspended, and the joint material can be accurately positioned on the end face of the caisson.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a joint structure of the present invention.

FIG. 2 is a perspective view of a joint material used for the joint structure.

FIG. 3 is a rear view of the joint material.

FIG. 4 is a side view of the lower end of the joint material.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a sectional view taken along line BB of FIG. 2;

FIG. 7 is a front view showing an example of a suspension member locking member.

FIG. 8 is a longitudinal sectional view showing a state in which a filler is filled in a joint material main body after construction.

FIG. 9 is a longitudinal sectional view illustrating a process of following a joint material with respect to displacement of a caisson.

FIG. 10 is a longitudinal sectional view showing a state where the joint material has finished following the displacement of the caisson.

FIG. 11 is a perspective view showing another example of a joint material main body.

FIG. 12 is a longitudinal sectional view showing a state in which a filler is filled in the joint material of FIG. 8;

FIG. 13 is a longitudinal sectional view showing a process of following the joint material of FIG. 8 with respect to the displacement of the caisson.

14 is a longitudinal sectional view showing a state in which the joint material of FIG. 8 has finished following the displacement of the caisson.

[Explanation of symbols]

 1, 2 caisson 10, 10 'joint material (joint material for caisson) 11 main body part (joint-like main body) 12 mounting flange 13 inner bag (bag-like member) 14 notch part (bulging allowable part) 16 plate-like member ( Rigid member 16a Projecting lower end 16b Projecting upper end 19 Anchor 24 Fixing plate (fixing member) 27, 28 Fixing bar (rigid member fixing member) 29 Suspension member locking member

Claims (9)

(57) [Claims] 1. A joint material longitudinally disposed between end faces of caissons arranged adjacent to each other, wherein the joint material main body is made of a deformable material such as rubber or synthetic resin. A pair of rigid members having an anchoring portion provided on both sides to extend in the longitudinal direction of the joint material main body, extending over the entire length thereof, and further having a projecting lower end portion projecting downward from a lower end of the joint material main body; An anchor comprising a rigid member fixing member for mutually fixing the pair of rigid members at a plurality of locations in the longitudinal direction of the pair of rigid members so that the interval between the pair of rigid members is maintained at equal intervals over the entire length. The anchoring portion of the joint material having the portion is disposed on the end surface of one caisson, the lower end of the rigid member protruding into the ground at the bottom of the water, and the upper end of the rigid member is Fixed on top of caisson The joint material is fixed to the end face of the one caisson by being fixed to the fixed fixing member. 2. A joint structure for a caisson according to claim 1, wherein a suspending member locking member for locking a joint material suspending operation suspending member is attached to said pair of rigid members. 3. The joint material main body is a hollow cylindrical body having an opening for filling filler at an upper end, and the anchoring portion extends sideways from the back side of the cylindrical body. 3. The joint structure for caisson according to claim 1, comprising the rigid member fixed to the flange portion. 4. 4. The joint material main body is provided with a bag-shaped member integrally joined to a lower end of the cylindrical body in a state of being fitted into the hollow portion in a concave shape, and the bag-shaped member is attached to a front edge of a lower end of the cylindrical body. The joint structure for a caisson according to claim 3, wherein a swelling permitting portion that allows the member to swell to the front side is formed. 5. A joint material which is vertically arranged between end faces of caissons arranged adjacent to each other, wherein the joint material body is made of a deformable material such as rubber or synthetic resin. An anchoring portion provided on both sides so as to extend in the longitudinal direction of the joint material main body, extending over the entire length thereof, further projecting from the lower end of the joint material main body, and projecting downward from the lower end thereof and from the upper end of the joint material main body to above A pair of rigid members having a protruding upper end portion projecting to the pair of rigid members at a plurality of locations in a longitudinal direction of the pair of rigid members such that an interval between the pair of rigid members is maintained at equal intervals over the entire length thereof. An anchoring portion including a rigid member fixing member for fixing the rigid members to each other, and a suspending member locking member for locking the joint material suspending operation suspending member attached to the pair of rigid members. A joint member provided with the suspension The anchoring part is disposed on the end surface of one caisson by operating the suspender for suspending the joint material, which is locked by the member, to be disposed vertically on one end of the caisson, and to hit the projecting upper end of the rigid member. Then, after projecting the lower end of the rigid member into the ground at the bottom of the water, the upper end of the rigid member is fixed to a fixing member fixed to the top of the caisson, thereby joining the joint material to the one caisson. A method for constructing a joint structure for caisson, which is fixed to an end face. 6. A joint material provided vertically between end faces of caissons arranged adjacent to each other, wherein the joint material body is made of a deformable material such as rubber or synthetic resin. An anchoring portion provided on both sides so as to extend in the longitudinal direction of the joint material main body, extending over the entire length thereof, further projecting from the lower end of the joint material main body, and projecting downward from the lower end thereof and from the upper end of the joint material main body to above A pair of rigid members having a protruding upper end portion projecting to the pair of rigid members at a plurality of locations in a longitudinal direction of the pair of rigid members such that an interval between the pair of rigid members is maintained at equal intervals over the entire length thereof. And an anchoring portion provided with a rigid member fixing member for fixing the rigid members to each other. 7. The joint material for caisson according to claim 6, wherein a suspending member locking member for locking a suspending member for a joint material suspending operation is attached to said pair of rigid members. 8. The joint material main body is a hollow cylindrical member having an opening for filling filler at an upper end, and the anchoring portion extends laterally from the back side of the cylindrical member. The joint material for caisson according to claim 6 or 7, comprising the rigid member fixed to the flange portion. 9. The joint material main body is provided with a bag-shaped member integrally joined to a lower end of the cylindrical body in a state of being fitted into the hollow portion in a concave shape, and the bag-shaped member is attached to a front edge of a lower end of the cylindrical body. 9. The joint material for caisson according to claim 8, wherein a swelling permitting portion for allowing the member to swell to the front side is formed.