JP2831974B2 - 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 into a flat state and fix it with a caul plate, bolts, etc., 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.

[0003]

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 rocking, waves, earth and sand, etc., and can function as a joint material.However, when the joint material is attached to an existing caisson, the joint width between adjacent caissons Is very narrow, for example, about 20 to 30 cm, so it is impossible or extremely difficult for a worker to enter the joint and attach the joint to the end face of one caisson. Even if it can be attached to the end face, it is not fixed firmly with sufficient strength, so it will not be fixed after installation due to the pressing force of waves, earth and sand, etc. There is a problem that can not perform the function of wood enough.

The present invention has been made in view of the above-mentioned problems of the conventional caisson joint material, and can be easily and sufficiently attached to the end face of a caisson even when laid between existing caissons. An object of the present invention is to provide a joint structure for caisson, a method of constructing the same, and a joint material for caisson that can sufficiently perform the function of the joint material without being moved by waves or earth and sand after installation.

[0005]

According to a first aspect of the present invention, there is provided a joint structure for a caisson, wherein the joint material is disposed vertically between end faces of adjacently disposed caissons. A joint material main body made of a deformable material such as rubber and synthetic resin, and an anchoring portion provided to extend in the longitudinal direction of the joint material main body on at least one side of the joint material main body, and extending over its entire length. An anchoring portion including a rigid member having a protruding lower end portion extending downward and further projecting downward from a lower end of the jointing material body, the anchoring portion of the jointing material 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 fixed to To.

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

According to a third aspect of the invention, there is provided a joint structure for a caisson, wherein the joint material main body is provided at a lower end of the cylindrical body so that a bag-shaped member is integrally fitted in a hollow state 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.

According to a fourth aspect of the present invention, in the joint structure for caisson, the joint material main body is a flexible plate-like member arranged between end faces of adjacently arranged caissons, and the anchoring is performed. Parts are provided on both sides of the joint material body, the anchoring part on one side is disposed on the end face of one caisson,
The anchoring portion on the other side is disposed on an end surface of the other caisson.

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 arranged between end faces of caisson arranged adjacent to each other. A joint material body made of a deformable material, and an anchoring portion provided on at least one side of the joint material body so as to extend in the longitudinal direction of the joint material body. An anchoring portion provided with a rigid member having a protruding lower end projecting downward from a lower end of the main body and a protruding upper end projecting upward from an upper end of the jointing material main body. Disposed above, and by projecting the projecting lower end of the rigid member into the submerged ground by hitting the projecting upper end of the rigid member, cutting off the projecting upper end as necessary, and then cutting the rigid member Secure the top to the top of the caisson The said purpose land material by fixing the fixing member, characterized in that fixed to the end surface of one of the caissons the that.

[0010] The joint material for caisson according to the invention described in claim 6 is a joint material vertically arranged between the end faces of the caisson arranged adjacent to each other, and is capable of deforming rubber, synthetic resin, or the like. And an anchoring portion provided on at least one side 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 having a lower end of the joint material body. And an anchoring portion provided with a rigid member having a protruding upper end projecting upward from an upper end of the joint material main body.

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

The joint material for a caisson according to the invention described in claim 8 is provided such that the joint material body is integrally joined to a lower end of the cylindrical body in a state in which a bag-like member is concavely fitted into a hollow portion. A swelling permitting portion for allowing the bag-like member to swell toward the front side is formed at a front edge of the lower end of the cylindrical body.

According to a ninth aspect of the invention, there is provided a joint material for caisson, wherein the joint material main body is a flexible plate-like member which is arranged to be stretchable between end faces of adjacently arranged caissons,
The anchoring portions are provided on both sides of the joint material main body, one anchoring portion is provided on an end surface of one caisson, and the anchoring portion on the other side is provided on an end surface of the other caisson. It is characterized by being arranged in.

[0014]

According to the present invention, there is provided a rigid member having an anchoring portion of a joint material having a projecting lower end projecting downward from a lower end of the joint material body and a projecting upper end projecting upward from an upper end of the joint material body. Since the anchoring portion is disposed on the end face of the caisson and the projecting upper end of the rigid member is hit, the projecting lower end of the rigid member can be driven into the ground at the bottom of the water, and then if necessary. The joint material can be fixed to the end surface of the caisson by cutting off the protruding upper end and fixing the upper end of the rigid member to a fixing member fixed to the top of the caisson.

[0015]

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 side view of a lower end portion of the joint material, and FIG. It is AA sectional drawing of FIG. Figure 1
In the fourth embodiment, a bag-like member is integrally joined to a lower end of a cylindrical joint material body in a state of being fitted into the hollow portion in a concave shape, and a front end of the lower end of the cylindrical body is forwardly connected to the bag-like member. The present invention is applied to a case where a joint material having a swelling permitting portion for allowing swelling 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 12 has an opening at the upper end for filling the filler.

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, and the lower end opening is closed by the inner bag 13. ing.

The inner bag 13 is tapered and has a predetermined depth and is formed of a flexible material like the main body 11, and its opening edge is joined to the lower 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 cut-out portion 14 is formed at the lower end edge of the front side of the main body portion 11 (on the side in contact with an adjacent caisson) as a bulging allowance 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 a 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. If the plate members 16 are connected to each other with another plate material or the like as necessary, the plate members 16 are still rigid.

In the present embodiment, as shown in the sectional view of FIG.
6c has flange portions 16d on both sides, and the mounting flange 1
A pair of left and right holding plates 17 made of a steel plate or the like is disposed at a position corresponding to the flange portion 16d with the two interposed therebetween. 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.

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

The joint material 10 is vertically arranged along one end face of an existing caisson arranged adjacently, and the projecting upper end 16b of the plate-like member 16 of the anchoring portion 19 is hit with a vibro hammer. Accordingly, the projecting lower end portions 16a of the plate-like member 16 are driven into the ground at the water bottom until the lower end of the mounting flange 12 comes into contact with the water bottom. 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 to be 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 into 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-like 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 embodiment, the fixing plate 24 as the fixing member is fixed to the plate member 16 by welding to the upper end surface thereof. However, the present invention 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 part formed by this is fastened to the upper end of the plate member 16 with a bolt. Alternatively, it may be fixed by other methods.

In the above-described embodiment, the anchoring portions 19 are provided on both sides of the joint material main body 11, but if the installation state of the caisson permits, only the joint material 19 is provided on one side of the joint material main body 11. It may be fixed to the caisson end face alone.

Further, the joint material main body is not limited to the joint material of the above-described embodiment, but may be any of various cylindrical joint materials shown in FIG. 8 described later and a joint material made of a flexible plate member as shown in FIG. The present invention can be applied.

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 through an opening at the upper end 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. 5, the inner bag 13 is also pressed by the filler 20 to be inverted and pushed out from the lower end of the main body 11 to the lower side. 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, settled,
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, earth pressure extrusion, or the like. As shown in FIG. 6, 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. The inner bag 13 bulges forward through the notch 14 even when the caissons 1 and 2 are vertically displaced relative to each other. 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 joint material body 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.

In the illustrated joint material 10 ', an inner bag 13 is provided at the lower end of the main body 11 similarly to 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 notch 13A of the main body 11 located in front of the notch 13A of the inner bag 13. 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-sectional shape, 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 amount of entry. , 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, as shown in FIG. 9 which is a longitudinal sectional view, coarse sand and asphalt mastic are inserted into the hollow portion of the main body portion 11 from the upper end opening. 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.
The body 1 is inverted by being pressed by the filler 20.
1 is pushed downward from the lower end and pressed against the upper surface of the foundation 3, and at the same time, the folded portion 15 on the front surface is pushed forward and pressed against the end surface of the adjacent caisson 2.

FIG. 4 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, settlement of the ground, vibration due to waves, displacement, extruding due to earth pressure, etc., and the joint width is widened. As shown in FIG. 10, the main body 11 expands and widens due to the pressure of the filler 20 to prevent the generation of a gap as shown in FIG. 11 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.

Next, a plan view of FIG. 12 (a part is shown in section)
With reference to, another embodiment of the joint structure of the present invention will be described. Parts having the same functions as in the embodiment of FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be omitted.

The main difference between this embodiment and the embodiment shown in FIGS. 1 to 4 is that, in this embodiment, the main body 31 of the joint material 30 is not cylindrical, but is made of rubber, synthetic resin, or the like. The flexible plate-shaped member is bent in an M-shape so as to be extendable and contractible between the end surfaces of the adjacent caissons 1 and 2, and the two anchoring portions 33 of the joint material 30 are: Instead of one caisson as in the embodiment of FIGS.
3 is provided on the end face of one caisson 1, and the other anchoring portion 33 is provided on the end face of the other caisson 2.

In the embodiment shown in FIG. 12, the plate member 16 constituting the rigid member is made of L-shaped steel,
The mounting flange 32 of the joint material 30 forms an anchoring portion 33. A waterproof packing 34 is interposed between the anchoring flange portion 16e facing the caisson end surface of the plate-like member 16 and the caisson end surfaces 1b, 2b.

One end of the fixing plate 35 fixed to the tops 1a and 2a of the caissons 1 and 2 is bent downward at a right angle to form a hanging portion 35a. An anchoring flange portion 16e of the member 16 is fixed by bolting. The construction method of this joint structure is shown in Fig. 1.
Since the construction method is the same as that of the fourth to fourth embodiments, the description thereof is omitted.

[0047]

As described above, according to the present invention, the anchoring portion of the joint material projects downward from the lower end of the joint material body and the projecting upper end projects upward from the upper end of the joint material body. Since the rigid member having the rigid member is provided, the anchoring portion is disposed on the end surface of the caisson, and the projecting lower end of the rigid member is driven into the ground at the bottom of the water by hitting the projecting 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.

Therefore, when attaching the joint material to the existing caisson, the worker does not need to enter the joint, and the joint material can be firmly fixed to the end face of the caisson simply by working on the top of the caisson. Later, the joint material does not move due to waves and earth and sand, and the function of the joint material can be sufficiently exhibited.

[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 side view of a lower end portion of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a longitudinal sectional view showing a state in which a filler is filled in a joint material main body after construction.

FIG. 6 is a longitudinal sectional view showing a process of following a joint material with respect to displacement of a caisson.

FIG. 7 is a longitudinal sectional view showing a state in which the joint material has finished following the displacement of the caisson.

FIG. 8 is a perspective view showing another example of a joint material main body.

FIG. 9 is a longitudinal sectional view showing a state in which a filler is filled in the joint material of FIG. 8;

FIG. 10 is a longitudinal sectional view showing a process of following the joint material of FIG. 8 with respect to the displacement of the caisson.

FIG. 11 is a longitudinal sectional view showing a state in which the joint material of FIG. 8 has finished following the displacement of the caisson.

FIG. 12 is a plan view showing another embodiment of the joint structure of the present invention.

[Explanation of symbols]

 1, 2 caisson 10, 10 ', 30 Joint material (joint material for caisson) 11, 31 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, 33 Anchor 24, 35 Fixing plate (fixing 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. An anchoring portion provided on at least one side so as to extend in the longitudinal direction of the joint material main body, the rigid member including a projecting lower end portion extending over the entire length thereof and projecting downward from a lower end of the joint material main body. The anchoring portion of the joint material having the anchoring portion 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. A joint structure for caisson, characterized by being fixed to the caisson. 2. 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 a back side of the cylindrical body. 2. The joint structure for a caisson according to claim 1, wherein the joint structure comprises the rigid member fixed to the flange portion. 3. The joint material main body is provided such that a bag-like member is 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-like member is attached to a front edge of a lower end of the cylindrical body. The joint structure for a caisson according to claim 2, wherein a swelling permitting portion that allows the member to swell to the front side is formed. 4. The joint material main body is a flexible plate-like member arranged between the end faces of adjacently arranged caissons so as to be extendable and contractible.
The anchoring portions are provided on both sides of the joint material main body, and one anchoring portion is disposed on an end surface of one caisson, and the other anchoring portion is provided on the other caisson. The joint structure for caisson according to claim 1, wherein the joint structure is provided on an end face. 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 at least one side 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 an upper end of the joint material main body An anchoring portion having a rigid member having a protruding upper end projecting upward from the joint member is disposed on an end surface of one caisson, and the projecting upper end of the rigid member is hit. After the projecting lower end of the rigid member is cast 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 end surface of the one caisson. Characterized in that it is fixed to Construction method of joint structure. 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 at least one side 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 an upper end of the joint material main body And an anchoring portion provided with a rigid member having a protruding upper end portion protruding upward from the joint. 7. 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 rear side of the cylindrical body. 7. The joint material for caisson according to claim 6, comprising the rigid member fixed to the flange portion. 8. The joint material main body is provided such that a bag-shaped member is 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 the lower end of the cylindrical body. The joint material for caisson according to claim 7, wherein a swelling permitting portion that allows the member to swell to the front side is formed. 9. The joint material main body is a flexible plate-like member which is disposed between end faces of adjacently disposed caissons so as to be extendable and contractible.
The anchoring portions are provided on both sides of the joint material main body, one anchoring portion is provided on an end surface of one caisson, and the anchoring portion on the other side is provided on an end surface of the other caisson. The joint material for caisson according to claim 6, wherein the joint material is provided in a joint.