JP3089588B2 - Joint structure of underground concrete structures - 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 structure of a concrete structure constructed underground.

[0002]

2. Description of the Related Art As shown in FIG. 1, as a reinforced concrete structure buried in the ground, for example, a culvert conventionally connects a number of concrete pieces to form a water flow path in the ground. The concrete pieces are connected with a tie bar or a slip bar with a water stop plate interposed as a joint.

[0003]

However, in the case of the joint structure of the concrete pieces constituting the culvert as described above, the following problems have occurred. That is, as shown in FIG. 21, when the joint structure is subjected to ground deformation due to an earthquake or the like, the seismic force is supported by the tie bar or the slip bar. If they are dissatisfied with the absorption of concrete, and the seismic force is large, there is a possibility of causing harmful effects such as contact between the concrete pieces and damage. In addition, the joint structure does not restore its original shape if the tie bar or the slip bar is deformed. Therefore, the displacement of the concrete piece remains as it is after the seismic force is released, and a repair is required if the displacement is large. Also occurs.

Further, in consideration of the above problem, a structure in which a flexible joint is attached to the joint is also conceivable. However, it is expensive and greatly increases the construction cost, and the construction time is extended because the construction is troublesome. It is not a fundamental solution.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and does not damage the concrete structural material against seismic force, and copes with the seismic force by rigid deformation of the concrete structural material. It is an object of the present invention to provide a joint structure of an underground concrete structure capable of restoring a position of a concrete structural material to an original place after the release of the concrete structure.

[0006]

According to another aspect of the present invention, there is provided a joint structure of an underground concrete structure according to the first aspect of the present invention, wherein a pair of concrete structures are connected under the ground via a joint space. The material is connected by a rubber material, the rubber material has a locking portion formed by forming projections at both ends of the cross section and a connecting portion connecting the locking portion, and extends over the entire length direction of the joint, A locking portion is embedded and attached to each of the two concrete structural members, and the rubber member has a high hysteresis.
Characterized by being made of high-attenuation rubber .

[0007] The invention according to claim 2 is based on claim 1.
Further, the rubber material has a bulging portion at the connecting portion, and the bulging portion is positioned and attached to the joint space. The invention according to claim 3 is based on claim 2,
A high-rigidity member having a protrusion at at least one end is embedded between the bulging portion and each of the locking portions. The invention as set forth in claim 4 is characterized in that
Joint structure of cleat structure, which becomes joint in the ground
Go to a pair of concrete structural materials
The rubber material forms projections at both ends of the cross section
A connecting portion for connecting the locking portion and the locking portion,
Extending over the entire length of the
Embedded and mounted in each of the concrete structural materials
The rubber material has a bulging portion at the connecting portion, and the bulging portion is
A flexible metal material is buried between the bulging portion and each locking portion, and is mounted so as to be located in a space serving as a joint . The invention according to claim 5 is an underground
Joint structure of a concrete structure to be constructed in
A pair of concretes that are connected under the ground through a joint space
Riet structure material is connected with rubber material.
A locking portion having a projection formed at an end thereof and a link connecting the locking portion.
A joint, extending over the entire length of the joint,
Embed a stop in each of the two concrete structures
The rubber material has a bulging part at the connecting part,
The bulging portion is positioned in the joint space and attached.
A plurality of thin plate members are continuously provided in the bulging portion in the joint width direction, and each thin plate member is arranged along the length direction of the joint.

[0008] The invention according to claim 6 is based on claim 1.
And a large number of locking projections protruding from the connecting portion of the rubber material. The invention according to claim 7 is a method according to claim
Item 1 is characterized in that an anchor member extending in the concrete structural material and supporting a tensile force acting on the rubber material is attached to the locking portion. The invention according to claim 8 is a joint structure of a concrete structure constructed underground.
It was built in the ground through a joint space.
A pair of concrete structural materials are connected by rubber
The locking part has protrusions formed at both ends of the cross section.
Has a connecting portion that connects the joints over the entire length of the joint.
And the locking portions are connected to the two concrete structural members.
A supporting member formed in a shape protruding from the rubber material is inserted into a through hole that is buried and mounted in each of the connecting portions of the locking portion of the rubber material, and the supporting member is made of a concrete structure. It is characterized by being fixed in the material.

[0009] The invention according to claim 9 is the invention according to claim 1.
The rubber member is formed in a shape connected by a continuous curve between the locking portion and the connecting portion. The invention according to claim 10 is a concrete constructed underground.
The joint structure of the building, through a space that becomes a joint in the ground
A pair of concrete structural members
The rubber material is formed with protrusions at both ends of the cross section
It has a connecting part that connects the locking part and the locking part, and
Extending over the entirety of the
It is characterized by being buried and attached to each of the structural members, and a plurality of concrete casting holes are vertically penetrated in the connecting portion of the rubber material.

[0010] The invention according to claim 11 is constructed underground.
Joint structure of a concrete structure to be
A pair of concretes connected via a joint space
Structural material is connected with rubber material, and rubber material is
A connecting part that connects the locking part with the locking part
And extends over the entire length of the joint, and has a locking portion.
Buried in each of the two concrete structures
A plurality of cutouts are formed in the rubber material at positions that do not communicate with each other at the upper portion or the lower portion of the locking portion. The invention according to claim 12 is based on claim 1.
Further, the rubber material is characterized in that a mounting portion between the locking portion and the connecting portion is formed to have a smaller sectional area than the locking portion and the connecting portion. The invention according to claim 13 is constructed underground.
Joint structure of a concrete structure to be
A pair of concrete structures connected via a space
The building materials are connected by rubber material, and the rubber material
It has a locking part that forms
Extend over the entire length of the joint,
Buried in each of the two concrete structures
A rubber material is formed by extending the connection portion in the length direction of the joint, and the connection portion of one rubber material connected in the length direction of the joint is fixed to the other connection portion in a superposed state. It is characterized by having. The invention according to claim 14 is constructed underground.
Joint structure of a concrete structure to be
A pair of concretes connected via a joint space
Structural material is connected with rubber material, and rubber material is
A connecting part that connects the locking part with the locking part
And extends over the entire length of the joint, and has a locking portion.
Buried in each of the two concrete structures
And a rubber material is integrally formed with a buffer portion to be interposed between the concrete structural members. The invention according to claim 15 is the invention according to claims 4, 5, 8 , 10, 1.
(1), (13) or (14), wherein the rubber material is formed of a high-damping rubber having a high hysteresis force.

[0011]

According to the first aspect of the present invention, the rubber structural members to be connected are connected in a state of being sealed in a water-tight manner, and the deformation energy of the joint structure due to the movement of the concrete structural materials when seismic force acts is absorbed. To reduce the displacement of concrete structures. In addition, since the joint width between concrete structural members is maintained by supporting the compressive force acting between the concrete structural members, the displacement of the concrete structural members during the action of seismic force is made parallel to the length direction of the joints. Prevent contact between them. Also, deformation of seismic force
When energy is applied, the high damping rubber
Absorbs and attenuates, and after the external force is released
Eliminates the displacement of the member moved by the restoring force of the rubber.

According to the second to fifth aspects of the present invention, the swollen portion absorbs deformation energy and has a large seismic force damping ability, so that a larger seismic force can be supported.
According to the third aspect of the present invention, the rubber material forming the bulging portion and the high-rigidity member can absorb deformation energy and support a greater seismic force. Claim 4
The described invention facilitates restoration of the rubber material after the removal of the seismic force by setting the strength of the metal material embedded in the bulging portion to an appropriate level. According to the fifth aspect of the present invention, the inside of the bulging portion is divided in the joint width direction by the thin plate material, and the frictional resistance in the width direction of the bulging portion increases when a compressive force in the joint width direction acts, so Prevent bulging deformation of the part.

The invention according to claims 6 to 8 is to improve the tensile strength against the tensile force in the joint width direction in the invention according to claim 1, and the invention according to claim 6 is that the connecting part has By providing the locking projection, the area of adhesion of the rubber material to the concrete structural material is increased, the pull-out resistance is increased, and a high tensile strength is exhibited. According to the invention of claim 7, the anchor member attached to the locking portion disperses the tensile force acting on the rubber material into the concrete structural material, thereby increasing the pull-out resistance of the rubber material and exhibiting a high tensile strength. I do. In the invention according to claim 8, the bearing member effectively disperses the tensile force in the joint width direction into the concrete structural material, thereby preventing the stress concentration of the tensile stress that should support the tensile force, and It exerts a tensile stress between the and the locking portion, thereby preventing stress concentration in the rubber material and exerting a high tensile strength.

[0014] The invention according to claims 9 to 11 is intended to maintain good cement around especially in the vicinity of the rubber member. Is formed as a continuous smooth curve, so that cement can be filled in the vicinity of the rubber member without stagnation during concrete casting. In the invention according to claim 10, cement can easily flow into the lower part of the rubber material from the concrete casting hole,
It is possible to make the casting of concrete below the rubber material better and easier. According to the eleventh aspect of the present invention, it is possible to stably and satisfactorily pour the concrete near the rubber material because the cement can enter and exit between the locking parts through the notch at the time of concrete casting. Can be.

According to the twelfth aspect of the present invention, since the cross-sectional area of the joining portion between the connecting portion and the engaging portion is small and can be bent, by changing the mounting angle of the engaging portion with respect to the connecting portion, Even when the installation position of the concrete structural material is not on a straight line, the joint structure can be easily constructed.

According to the thirteenth aspect of the present invention, the rubber members connected in the longitudinal direction of the joint structure are tightly joined to each other in a watertight manner, so that the joint structure of the rubber materials ensures the watertightness of the joint structure. Can be held.

According to the fourteenth aspect of the present invention, since the cushioning portion is integral with the rubber material, the setting of the joint width and the like when the joint structure is constructed is simplified.

According to a fifteenth aspect of the present invention, when the deformation energy of the seismic force acts, the high damping rubber absorbs the deformation energy and attenuates, and after the external force is released, the high damping rubber moves by the restoring force of the high damping rubber. Eliminate the displacement of the member.

[0019]

1 to 3 show a first embodiment of the present invention.
This will be described with reference to FIG. Reference numeral 1 in the figure denotes a culvert (concrete structure) constructed by connecting concrete pieces (concrete structural materials) 2 with the joint structure of the underground concrete structure of the present embodiment. As shown in FIGS. 1 and 3, the culvert 1 connects a concrete piece 2 formed in a tubular shape with a square cross section to an inner hole 3 through an joint space 1 a of about 10 to 20 mm in a longitudinal direction thereof. Each of the concrete pieces 2 is connected by a rubber joint material 4 made of high-damping rubber to form an joint structure of an underground concrete structure.

As shown in FIGS. 2 and 3, the rubber joint material 4
Is an elongated member having an H-shaped cross section, which is embedded in both ends of the concrete pieces 2 and 2 to be connected and attached in a rectangular shape along the end faces of the concrete pieces 2 and 2, The concrete pieces 2 and 2 are connected in a watertight manner. Connecting portion 5 forming a web portion of rubber joint material 4
Has a central portion exposed to the joint space 1a. The locking portion 6 is formed in a shape projecting vertically at both ends of the connecting portion 5, is fixed to the concrete forming the concrete piece 2, and has a pull-out resistance against a tensile force acting on the rubber joint material 4. Demonstrate. The joint space 1a is provided with a sheet-like joint material 7 made of elastite or the like having a waterproof property.

The culvert 1 is constructed as follows. While excavating a portion of the ground where the culvert 1 is to be constructed, a rubber joint base material 4 is installed at a target position in this excavated portion, a formwork is installed, and concrete is cast, and one side of the rubber joint base material 4 is removed. One concrete piece 2 is constructed in a buried state. Next, the jointing material 7 is installed on the end face of the constructed concrete piece 2 where the rubber jointing material 4 is attached, and the rubber jointing material 4 is installed on the construction part of the concrete piece 2 opposite to the jointing material 7. Pour concrete. Hereinafter, the culvert 1 is constructed by repeating the above operation.

The operation of this embodiment will be described below. According to the joint structure of the underground concrete structure, the deformation energy acts on each of the concrete pieces 2, 2,.
Is displaced. However, between the concrete pieces 2, 2,..., The rubber joint material 4 and the joint material 7 interposed therebetween support the compressive force between the concrete pieces 2, 2,. Can be maintained. As a result, as shown in FIG. 20, each concrete piece 2 horizontally moves with each other while substantially maintaining the initial joint width.

Therefore, according to the joint structure of the underground concrete structure of this embodiment, the concrete piece 2,
Are connected by the rubber joint base material 4, so that even if seismic force acts on the culvert 1, the rubber joint base material 4 attenuates the deformation energy of the seismic force and reduces the displacement amount of the concrete piece 2. At the same time, the rubber joint material 4 is deformed substantially along the displacement of the concrete piece 2 and the concrete pieces 2 and 2 can be connected while maintaining watertightness. In addition, since the rubber joint material 4 has a hysteresis property, after the seismic force is removed, the rubber piece 4 exhibits a high hysteresis force and pulls the concrete pieces 2 and 2 back to the substantially original position to remove the concrete pieces 2. By restoring the original installation position, there is no need to repair the culvert 1 after the action of seismic force.

Hereinafter, another embodiment of the present invention will be described. Each embodiment of the present invention described below is a mode in which the configuration of the rubber joint material 4 is changed, and in the explanatory drawings, the same components as those in FIGS. 1 to 3 are the same. The reference numerals are used to simplify the description.

Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. The joint structure of the underground concrete structure according to the present embodiment is obtained by attaching a rubber joint material 4 a formed in a shape having a bulging portion 8 having a rectangular cross section to the connecting portion 5 of the rubber joint material 4 to the joint portion. is there. The bulging portion 8 is formed entirely in the length direction of the rubber joint material 4a, is positioned in the joint space 1a, and has a side surface exposed to the joint space 1a. In the joint structure of the underground concrete structure of this embodiment, the connecting portion 5 of the rubber joint material 4a has the bulging portion 8 and has a large resistance to deformation, so that the deformation energy damping ability is large and the displacement of the concrete piece 2 is large. Can be reduced.

Further, as shown in FIG. 5, if an iron plate 9 (high rigidity member) is buried in the bulging portion 8, the proof stress during an earthquake is improved, and the ability to attenuate deformation energy is further improved. hand,
In addition to being able to further reduce the displacement of the concrete piece 2, the compressive force is improved and the concrete piece 2,
2. The joint width between... Can be kept constant. Further, as shown in FIG. 6, if a lead bar (metal material) 10 is buried in the rubber joint material 4a, the proof stress and the performance of the rubber joint material 4 can be exhibited by adjusting the size of the cross section of the lead rod 10. And the restoring force can be easily adjusted, and displacement due to an earthquake or the like can be sufficiently eliminated. In addition, as shown in FIG. 7, if a plurality of thin iron plates (thin sheet materials) 11 arranged along the length direction of the joint in the bulging portion 8 are buried in the joint width direction in a continuous state, the joint is Since the frictional resistance between the rubber forming the bulging portion 8 and the thin iron plate 11 with respect to the compressive force in the width direction increases, the bulging deformation of the bulging portion 8 is prevented to prevent the rubber joint material 4a from deforming, and The displacement of the pieces 2, 2, ... can be further reduced.

Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. The joint structure of the underground concrete structure according to the present embodiment is designed to prevent detachment, movement of the connection position, and the like, particularly by increasing the strength against the tensile force acting in the joint width direction. As shown in FIG.
The first aspect of the present embodiment is a
A rubber joint material 4b formed in a shape having a plurality of locking projections 12 is attached to the joint portion. The rubber joint material 4b increases the contact area between the concrete piece 2 and the concrete by the locking projections 12, and increases the contact resistance between the rubber joint material 4 and the concrete with respect to the tensile resistance acting on the rubber joint material 4. It is configured to generate a large tensile stress. The joint structure of the underground concrete structure according to the present embodiment can improve the tensile strength of the joint structure of the underground concrete structure without affecting the workability of the joint structure of the underground concrete structure. , The deformation of the rubber joint material 4b at the time of supporting the tensile force is reduced, and the life of the rubber joint material 4b is extended.

As shown in FIG. 9, in a second mode of the present embodiment, an anchor bolt 13 is attached to the locking portion 6, and a tensile force acting on the rubber joint material 4b is applied to the concrete piece 2 via the anchor bolt 13. It is configured to be transmitted to and supported in the skeleton. The joint structure of the underground concrete structure according to the present embodiment has a shape in which the anchor bolts 13 are stretched around the concrete piece 2 so that the tensile force to be supported is widely dispersed in the concrete piece 2, and Stress concentration can be prevented,
It is possible to further improve the tensile strength.

As shown in FIG. 10, according to a third embodiment of the present invention, a reinforcing bar is bent in a U-shape into through holes 14 vertically penetrating the locking portions 6 of the rubber joint material 4b. The supporting member 15 formed as described above is penetrated. Bearing member 15
Is installed with the bent end portion facing inward of the concrete piece 2 and is embedded and fixed in the concrete of the concrete piece 2. Since the joint structure of the underground concrete structure of this embodiment supports the engaging portion 6 and the supporting member 15 by dispersing the tensile force, the joint structure prevents the stress concentration by dispersing the tensile stress in the rubber joint material 4b. If the supporting member 15 is formed so as to be stretched around the concrete piece 2, further stress distribution can be achieved and a larger tensile stress can be supported, and the culvert 1 can be enlarged on a large scale using the large concrete piece 2. Can be constructed.

Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. The joint structure of the underground concrete structure according to the present embodiment is such that, by processing the rubber joint material 4, the area around the cement on which the concrete piece 2 is to be constructed is good, and good cast concrete is formed around the rubber joint material 4. It is intended to do so.

As shown in FIG. 11, the first embodiment of the present embodiment has a shape in which the rubber joint material 4 is connected to the connecting portion between the connecting portion 5 and the engaging portion 6 with a smooth curve to eliminate corner portions. The cement that has been cast is reliably filled around the rubber joint material 4c by flowing along the surface of the rubber joint material 4c. To form

As shown in FIGS. 12 and 13, a second embodiment of the present embodiment uses a rubber joint material 4d in which a number of concrete casting holes 16 are vertically penetrated in the connecting portion 5. . Therefore, in the second mode, the cement poured into the portion where the concrete piece 2 is to be constructed flows from the concrete casting hole 16 below the rubber joint material 4d, and therefore, the cement is sufficiently provided below the rubber joint material 4d. Can flow in and concrete can be cast well.

As shown in FIGS. 14 and 15, the third embodiment of the present invention is different from the third embodiment in that a large number of portions from the upper and lower ends to the joint portion of the locking portion 6 with the connecting portion 5 are provided on the upper or lower portion of the locking portion 6. The rubber joint material 4e formed with the notch 17 of FIG. As shown in FIG. 15, the cutouts 17 are continuously provided along the length direction of the locking portion 6 at positions that are staggered vertically and do not communicate with each other. The joint structure of the underground concrete structure according to the present embodiment is such that the cement introduced to construct the concrete piece 2 freely enters and exits the rubber joint material 4e above and below the rubber joint material 4e. Even in the vicinity of 4e, it is freely flowable and filled, so that good concrete placement is guaranteed.

Hereinafter, a fifth embodiment of the present invention will be described with reference to FIG. The joint structure of the underground concrete structure according to the present embodiment corresponds to a change in the construction direction of the concrete piece 2 by using a rubber joint material 4f formed so that the locking portion 6 can be freely bent with respect to the connecting portion 5. It is.
FIG. 16 shows a joint structure of an underground concrete structure according to the present embodiment in which a rubber joint member 4f formed by joining the connecting portion 5 and the engaging portion 6 through a narrow portion 18 having a particularly small cross-sectional area is used. It is configured using. Further, as shown in the third embodiment of the third embodiment, a through hole 14 is provided in the connecting portion 5, and the supporting member 15 is penetrated into the through hole 14 to increase the tensile strength. ing. According to the joint structure of the underground concrete structure of the present embodiment, since the locking portion 6 can be bent with respect to the connecting portion 5, the locking portion with respect to the connecting portion 5 corresponding to the installation position of the concrete piece 2. By changing the angle of 6, the concrete pieces 2 and 2 can be connected while ensuring the support of the tensile force even between the concrete pieces 2 and 2 arranged at an angle, and the culvert 1 is bent by bending. Can be constructed. Therefore, in the joint structure of the underground concrete structure of the present embodiment, the workability at the corner portion of the culvert 1 is improved, the work efficiency is improved, and the degree of freedom in designing the culvert 1 is improved.

Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 17, the joint structure of the underground concrete structure according to the present embodiment is such that a rubber joint material 4h, which forms one side of the concrete piece 2, is water-tightly joined by wrapping its longitudinal end, and concrete is joined. A series of watertight connecting bands are formed along the end face shape of the piece 2.

As shown in FIG. 18, rubber joint members 4h, 4h
In the joint portion of h, the engaging portion 6 of one rubber joint material 4h is extended in the longitudinal direction of the rubber joint material 4h to form a connecting end 19, and the other end to which the connecting end 19 is to be joined is formed. Is welded to the outer surface of the connecting portion 5 of the rubber joint material 4h.
The connection between the connection end portion 19 and the connection portion 5 may be performed by any other method such as adhesion as long as watertightness is ensured.

The joint structure of the underground concrete structure according to the present embodiment is such that the rubber joint members 4h connected in a rectangular frame shape are connected to the joint space 1a by surrounding the inner hole 3 in a watertight manner. The rubber joint material 4h absorbs the seismic force and attenuates while deforming in accordance with the displacement of the concrete piece 2 while maintaining the watertightness of the joint portion, and there is no need to consider the water stopping effect of the joint material 7, and the joint is not required. The workability of the structure is improved, and the work efficiency of the culvert 1 is improved.

Hereinafter, a seventh embodiment of the present invention will be described with reference to FIG. As shown in FIG. 19, the joint structure of the underground concrete structure according to the present embodiment is such that a rubber joint member 4 i integrally formed with a buffer portion 20 to be interposed between the concrete pieces 2 and 2 is made of concrete pieces 2 and 2. It is configured to be mounted in between. The rubber joint material 4i is formed in a shape in which a buffer portion 20 formed in a plate shape substantially equal to the end surface of the concrete piece 2 is vertically provided at the center of the connecting portion 5 of the rubber joint material 4 having an H-shaped cross section. ing. Buffer 2
Reference numeral 0 indicates that the end faces of the concrete pieces 2 and 2 are in contact with both left and right sides and are sandwiched.

In the joint structure of the underground concrete structure of this embodiment, the rubber joint material 4i integrally formed with the buffer portion 20 to be interposed between the concrete pieces 2 and 2 is installed between the concrete pieces 2 and 2. Since it is not necessary to install the joint material 7 separately from the rubber joint material 4i, and the positioning of the joint material 7 can be easily performed simultaneously with the fixing of the rubber joint material 4, the workability of the culvert 1 is improved. The construction efficiency and construction accuracy can be improved.

[0040]

As described above, according to the joint structure of an underground concrete structure according to the first aspect of the present invention, a pair of concrete structural members continuously connected in the ground via a space serving as the joint is formed of a rubber material. A rubber material is formed by a locking portion having projections formed at both ends of the cross section and a connecting portion connecting the locking portion, and extends over the entire length direction of the joint, and the locking portion is formed. Since it is characterized by being embedded in each of the two concrete structural members, the variable energy is attenuated during the action of seismic force to reduce the displacement of the concrete structural members, and in addition to the displacement of the concrete structural members, The rubber material can be deformed to maintain the joint structure. Ma
The rubber material is made of high damping rubber with high hysteresis.
It is characterized by the fact that concrete
After the seismic force is released against the displacement of the
To restore the original shape.
Shape and pull concrete structure back to original position for displacement
Reduces concretion due to the action of seismic force.
Repair work on the building can be reduced.

According to the joint structure of the underground concrete structure according to the second aspect, the rubber material is formed in a shape having a bulging portion at the connecting portion, and the bulging portion is located in the space to be the joint. Since it is characterized in that it is attached by being attached, the resistance to seismic force is improved, and the displacement of the concrete structural material can be reduced and the joint structure can be retained in a larger concrete structure.

According to the joint structure of an underground concrete structure according to the third aspect, a high rigid member having a projection at at least one end portion is embedded between the bulging portion and each of the locking portions. Because of the feature, it is possible to further increase the strength against the seismic force.

According to the joint structure of the underground concrete structure according to the fourth aspect, a flexible metal material is embedded between the bulging portion and each locking portion.
By adjusting the strength of the metal material, the proof stress of the rubber material can be easily adjusted so that the displacement of the concrete structural material due to the seismic force can be eliminated by the restoring force of the rubber material.

According to the joint structure of the underground concrete structure according to the fifth aspect, a plurality of thin plate members are connected in the joint width direction in the bulging portion, and each thin plate member is connected in the joint length direction. It is characterized by the fact that it is arranged along the bulge, so that the frictional force in the width direction of the bulge of the rubber and the thin plate material forming the bulge increases, and the bulge deforms in the width direction when a compressive force acts. Can be prevented.

According to the joint structure of the underground concrete structure according to the sixth aspect, since a large number of locking projections are projected from the connection portion of the rubber material, the connection portion and the concrete structural material are formed. The bonding area with the concrete to be increased increases, and the tensile strength of the rubber material increases.

According to the joint structure of the underground concrete structure according to the seventh aspect, an anchor member extending in the concrete structural material and supporting a tensile force acting on the rubber material is attached to the locking portion. Because of the feature, the tensile force is dispersed in the concrete structural material via the anchor member, stress concentration is prevented, and the tensile strength of the rubber material can be further improved.

According to the joint structure of the underground concrete structure according to the eighth aspect, a bearing member formed in a shape protruding from the rubber material in a through hole formed through a connecting portion of the locking portion of the rubber material. Is inserted, and the bearing member is fixed in the concrete structural member, so that the rubber material supports the tensile force dispersedly via the locking portion and the bearing member,
It is possible to further distribute the stress, and it can be applied to a concrete structure using a large-sized concrete structural material.

According to the joint structure of the underground concrete structure according to the ninth aspect, the rubber material is formed in a shape that is connected by a continuous curve between the locking portion and the connecting portion. In addition, the cement filled to form the concrete structural material flows in without staying around the rubber material, so that the concrete can be cast well.

According to the joint structure of the underground concrete structure according to the tenth aspect, a number of concrete casting holes are vertically penetrated in the connecting portion of the rubber material. The cement poured into the construction position flows into the lower portion of the rubber material through the concrete pouring hole, so that the concrete can be easily poured into the lower portion of the rubber material.

According to the joint structure of an underground concrete structure according to the eleventh aspect, a plurality of cutouts are formed in the rubber material at positions above and below the locking portion that do not communicate with each other. The cement poured into the construction position of the concrete structural material can freely enter and exit the rubber material through the notch, and is filled around the rubber material, so that the concrete can be cast well.

According to the joint structure of the underground concrete structure according to the twelfth aspect, the rubber material is formed such that the mounting portion of the locking portion and the connecting portion has a smaller cross-sectional area than the locking portion and the connecting portion. Therefore, the locking portion can be bent in the desired direction with respect to the connecting portion, and even when the concrete structural material is connected at an angle, it can support the tensile force acting between the concrete structural materials. It can be suitably installed in a concrete structural material, enabling construction of various concrete structures and improving the degree of freedom in design.

According to the joint structure of the underground concrete structure according to the thirteenth aspect, the rubber material is formed by extending the connecting portion in the length direction of the joint, and the rubber material is connected continuously in the length direction of the joint. It is characterized in that the connecting part of the rubber material is fixed to the other connecting part in a superposed state, so that the joint between the concrete structural materials is watertight and the rubber material is protected against the displacement due to the seismic force of the concrete structural material. Is deformed, and the watertightness can be reliably maintained.

According to the joint structure of the underground concrete structure according to the fourteenth aspect, since the rubber material is formed integrally with the buffer portion to be interposed between the concrete structural members, the joint construction is performed. The number of man-hours is reduced, and the positioning of the buffer portion is easy and accurate, so that the construction efficiency and the construction accuracy of the concrete structure are improved.

According to the joint structure of the underground concrete structure according to the fifteenth aspect, the rubber material is formed of a high damping rubber having a high hysteresis restoring force. After releasing the seismic force against the displacement of the concrete structural material due to the action of the seismic force, the rubber material exerts a high hysteresis restoring force and deforms in the direction to restore the original shape, of course, By reducing the displacement by returning the concrete structure to the original position, the repair work of the concrete structure due to the action of the seismic force can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall view showing a first embodiment of the present invention.

FIG. 2 is the front view.

FIG. 3 is a view taken in the direction of arrows AA in FIG. 1;

FIG. 4 is an enlarged side view of a joint portion showing one embodiment of the second embodiment of the present invention.

FIG. 5 is an enlarged side view of a joint portion showing the other aspect.

FIG. 6 is an enlarged side view of a joint showing another embodiment.

FIG. 7 is an enlarged side view of a joint showing another embodiment.

FIG. 8 is an enlarged side view of a joint showing a first embodiment of the third embodiment of the present invention.

FIG. 9 is an enlarged side view of a joint portion showing the second embodiment.

FIG. 10 is an enlarged side view of a joint portion showing the third embodiment.

FIG. 11 is an enlarged side view of a joint showing a first embodiment of the fourth embodiment of the present invention.

FIG. 12 is an enlarged side view of a joint portion showing the second embodiment.

FIG. 13 is a perspective view showing the concrete casting hole.

FIG. 14 is an enlarged side view of a joint portion showing the third mode.

FIG. 15 is an enlarged view showing the notch.

FIG. 16 is an enlarged side view of a joint showing one embodiment of the fifth embodiment of the present invention.

FIG. 17 is an enlarged front view of a joint portion showing a sixth embodiment of the present invention.

FIG. 18 is an enlarged view showing a joint portion of the rubber joint material.

FIG. 19 is an enlarged side view of a joint showing a seventh embodiment of the present invention.

FIG. 20 is a view showing the behavior of concrete pieces connected by the joint structure of the present invention with respect to seismic force.

FIG. 21 is a diagram showing a behavior of concrete pieces connected by a conventional joint structure with respect to seismic force.

[Explanation of symbols]

1 culvert (concrete structure) 2 concrete piece (concrete structural material) 4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4
h, 4i Rubber jointing material 5 Connecting part 6 Locking part 7 Jointing material 8 Swelling part 9 Iron plate (high rigid member) 10 Lead bar (metal material) 11 Thin iron plate (thin plate material) 12 Locking projection 13 Anchor bolt 14 Penetration Hole 15 Bearing member 16 Concrete pouring hole 17 Notch 18 Narrow place 19 Continuous end 20 Buffer part

Continuation of the front page (56) References JP-A-1-284640 (JP, A) JP-A-52-148940 (JP, A) JP-A-61-193198 (JP, U) JP-A-57-75017 (JP, A) , U) Jikken 38-10345 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 29/16 E02B 3/16 E03F 3/04 E04B 1/68

Claims (15)

(57) [Claims] 1. A joint structure for a concrete structure to be constructed underground, wherein a pair of concrete structural members continuously connected to each other via a space serving as a joint in the ground are connected by a rubber material. Has a locking portion formed with projections at both ends of the cross section and a connecting portion for connecting the locking portion, extends over the entire length direction of the joint, and has a locking portion for each of the two concrete structural members. mounted embedded in the rubber material is formed of a high damping rubber having a high history resilience
Joint structure of underground concrete construction, characterized in that there. 2. The joint structure of an underground concrete structure according to claim 1, wherein the rubber material has a bulging portion at a connecting portion, and the bulging portion is located in a space serving as the joint. A joint structure of an underground concrete structure which is attached. 3. The joint structure of an underground concrete structure according to claim 2, wherein a high-rigidity member having a protrusion at at least one end between the bulging portion and each of the locking portions is embedded. A joint structure of an underground concrete structure, characterized in that: 4. A concrete structure to be constructed underground.
Joint structure, connected continuously through the joint space underground
Of the pair of concrete structural materials
The rubber material has a locking part with projections formed at both ends of the cross section.
It has a connecting part to connect the locking part, and it
Extending over the two concrete structures
The rubber material has a swelling portion at a connecting portion, and the swelling portion is connected to the joint.
A joint structure of an underground concrete structure, wherein the joint structure is installed in a space defined by the following formula, and a flexible metal material is embedded between the bulging portion and each locking portion. 5. A concrete structure to be constructed underground.
Joint structure, connected continuously through the joint space underground
Of the pair of concrete structural materials
The rubber material has a locking part with projections formed at both ends of the cross section.
It has a connecting part to connect the locking part, and it
Extending over the two concrete structures
The rubber material has a swelling portion at a connecting portion, and the swelling portion is connected to the joint.
A plurality of thin plate members are connected in the joint width direction in the bulging portion, and each thin plate member is arranged along the joint length direction. Joint structure of an underground concrete structure 6. An underground concrete structure according to claim 1, wherein a number of locking projections protrude between said locking portions of a rubber material. Joint structure of the structure. 7. The joint structure of an underground concrete structure according to claim 1, wherein an anchor member extending in the concrete structure material and supporting a tensile force acting on a rubber material is attached to the locking portion. A joint structure of an underground concrete structure, characterized in that it is installed. 8. A concrete structure to be constructed underground.
Joint structure, connected continuously through the joint space underground
Of the pair of concrete structural materials
The rubber material has a locking part with projections formed at both ends of the cross section.
It has a connecting part to connect the locking part, and it
Extending over the two concrete structures
A supporting member formed in a shape protruding from the rubber material is inserted into a through-hole that is buried and attached to each of the members and penetrates through a connecting portion of the locking portion of the rubber material, and the supporting member is a concrete structure. A joint structure of an underground concrete structure fixed in a material. 9. The joint structure of an underground concrete structure according to claim 1, wherein the rubber material is formed in a shape connected by a continuous curve between the locking portion and the connecting portion. The joint structure of the underground concrete structure that is the feature. 10. A concrete structure constructed underground
The joint structure of the
Connecting a pair of concrete structural members with rubber
The rubber material has protrusions at both ends of the cross section.
The joint has a connecting part that connects the locking part and the entire joint in the length direction.
Extending over the two concrete structures.
A joint structure of an underground concrete structure characterized by being buried and attached to each of the building materials, and having a number of concrete placing holes vertically penetrating between locking portions of the rubber material. 11. A concrete structure constructed underground
The joint structure of the
Connecting a pair of concrete structural members with rubber
The rubber material has protrusions at both ends of the cross section.
The joint has a connecting part that connects the locking part and the entire joint in the length direction.
Extending over the two concrete structures.
A joint structure for an underground concrete structure, wherein a plurality of cutouts are formed at positions where the rubber material is buried and attached to each of the building materials and are not communicated with each other at an upper portion or a lower portion of the locking portion. 12. The joint structure of an underground concrete structure according to claim 1, wherein the rubber material is formed such that a mounting portion between the locking portion and the connecting portion has a smaller cross-sectional area than the locking portion and the connecting portion. A joint structure of an underground concrete structure. 13. A concrete structure constructed underground.
The joint structure of the
Connecting a pair of concrete structural members with rubber
The rubber material has protrusions at both ends of the cross section.
The joint has a connecting part that connects the locking part and the entire joint in the length direction.
Extending over the two concrete structures.
The rubber material is buried and attached to each of the building materials, and the rubber material is formed such that the connecting portion extends in the length direction of the joint, and the connecting portion of one rubber material connected in the length direction of the joint is the other. A joint structure of an underground concrete structure characterized by being fixed to a connecting portion in a superposed state. 14. A concrete structure constructed underground.
The joint structure of the
Connecting a pair of concrete structural members with rubber
The rubber material has protrusions at both ends of the cross section.
The joint has a connecting part that connects the locking part and the entire joint in the length direction.
Extending over the two concrete structures.
A joint structure for an underground concrete structure, wherein the joint material is embedded in each of the building materials and is formed integrally with a buffer portion to be interposed between the concrete structural materials. 15. The method of claim 4, 5, 8, 10, 11 ,
15. The joint structure of an underground concrete structure according to 13 or 14 , wherein the rubber material is formed of a high damping rubber having a high hysteresis.