JPH073828A - Joint construction of underground concrete structure - Google Patents

Abstract

PURPOSE:To promote strength against earthquake load and to enable the maintenance of joint construction by extending a rubber joint filler over the whole length of a joint, and burying an interlocking section thereof in a concrete structural material. CONSTITUTION:Concrete pieces 2 and 2 are continuously provided in the ground lengthwise thereof through a specific joint space, and both internal holes are in a linking state. Both concrete pieces 2 are connected with a rubber joint filler 4 formed of high damping rubber having high hysteresis restoring force. The rubber joint filler 4 is extended over the whole length of a joint so that interlocking sections 6 and 6 provided to both ends of a section are connected with a connector 5, and the interlocking sections 6 are buried and mounted respectively into both concrete pieces 2. As a result, the rubber joint filler 4 damps deformation energy of earthquake load to reduce displacement of the concrete pieces 2, at the same time, deformation is made along the displacement, and between the concrete pieces 2 is maintained watertightly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for 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, culvert conventionally connects a large number of concrete pieces to form a water flow path in the ground. A water stop plate is provided as a joint between the concrete pieces, and the concrete pieces are connected by tie bars or slip bars.

[0003]

However, in the case of the joint structure of the concrete piece forming the culvert as described above, the following problems have occurred. That is, as shown in FIG. 21, the joint structure supports the seismic force with the tie bar or the slip bar when the ground is deformed due to an earthquake or the like, but the deformation energy is small because the damping force of the seismic force is small. If the seismic force is large, the concrete pieces may come into contact with each other and be damaged, resulting in harmful effects. Further, the joint structure does not return to its original shape if the tie bar and the slip bar are deformed. Therefore, the displacement of the concrete piece remains after the seismic force is released, and if the displacement is large, repair is required. Also occurs.

Further, in view of the above problems, a structure in which a flexible joint is attached to a joint is also conceivable, but it is expensive and significantly increases the construction cost, and since the construction is troublesome, the construction period is extended, Not a fundamental solution.

The present invention has been made in view of the above-mentioned problems, and it is possible to deal with the seismic force by the rigid deformation of the concrete structural material without damaging the concrete structural material against the seismic force. It is an object of the present invention to provide a joint structure of an underground concrete structure capable of restoring the position of the concrete structure material to the original position after the release of the above.

[0006]

In order to solve the above problems, in the joint structure of an underground concrete structure according to claim 1, a pair of concrete structures are continuously provided in the ground through a space serving as a joint. The material is connected by a rubber material, and the rubber material has a locking portion formed by forming projections at both ends of the cross section and a connecting portion that connects the locking portion, and extends over the entire length direction of the joint, The locking part is embedded and attached to each of the both concrete structure materials.

The invention according to claim 2 is characterized in that the rubber material has a bulging portion at the connecting portion, and the bulging portion is positioned and mounted in the space serving as the joint. Claim 3
The described invention is characterized in that a high-rigidity member having a projection is embedded in at least one end between the bulging portion and each locking portion. The invention according to claim 4 is characterized in that a flexible metal material is embedded between the bulging portion and each locking portion. The invention according to claim 5 is characterized in that 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 joint length direction. .

The invention according to claim 6 is characterized in that a large number of locking projections are projected from the connecting portion of the rubber material. The invention according to claim 7 is characterized in that an anchor member that extends into the concrete structural material and supports a tensile force acting on the rubber material is attached to the locking portion. In the invention according to claim 8, a bearing member formed in a shape projecting from the rubber material is inserted into a through hole penetrating the connecting portion of the locking portion of the rubber material, and the bearing member is a concrete structural material. It is characterized in that it is fixed inside.

The invention according to claim 9 is characterized in that a rubber material is formed in a shape in which the engaging portion and the connecting portion are connected by a continuous curve. The invention according to claim 10 is characterized in that a large number of concrete pouring holes are vertically provided in a connecting portion of a rubber material.

The invention according to claim 11 is characterized in that the rubber material is
It is characterized in that a plurality of notches are formed at positions above or below the locking portion that do not communicate with each other. Claim 1
The invention described in 2 is characterized in that the mounting portion of the locking portion and the connecting portion of the rubber material is formed to have a sectional area smaller than that of the locking portion and the connecting portion. In the invention according to claim 13, the rubber material is formed by extending the connecting portion in the joint length direction, and the connecting portion of one rubber material connected in the joint length direction is connected to the other connecting portion. It is characterized in that it is fixed in a polymerized state.
The invention according to claim 14 is characterized in that a rubber material is integrally formed with a cushioning portion to be interposed between the concrete structural materials. The invention according to claim 15 uses a rubber material,
It is characterized by being formed of a high damping rubber having a high hysteresis restoring force.

[0011]

According to the first aspect of the present invention, the rubber members are connected in a watertight manner between the concrete structural members to be connected, and the deformation energy of the joint structure due to the movement of the concrete structural members is absorbed during the action of seismic force. To reduce the displacement of concrete structural materials. Further, since the compressive force acting between the concrete structural materials is supported and the joint width between the concrete structural materials is maintained, the displacement of the concrete structural material is made parallel to the joint length direction during the action of the seismic force. Prevent mutual contact.

According to the second to fifth aspects of the present invention, since the deformation energy is absorbed even in the bulging portion and the seismic force damping ability is large, a larger seismic force can be supported.
According to the third aspect of the invention, the high-rigidity member as well as the rubber material forming the bulging portion can absorb the deformation energy to support a larger seismic force. Claim 4
The described invention facilitates the restoration of the rubber material after the seismic force is removed by setting the strength of the metal material embedded in the bulging portion to an appropriate level. According to a 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 when the compressive force in the joint width direction acts, the friction resistance in the width direction of the bulging portion increases, and the bulging occurs. Prevents bulging and deformation of parts.

The invention according to claims 6 to 8 improves 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 characterized in that By providing the locking protrusion, the adhesion area of the rubber material to the concrete structural material is increased, the pull-out resistance is increased, and high tensile strength is exhibited. In the invention according to claim 7, the anchor member attached to the locking portion disperses the tensile force acting on the rubber material in the concrete structure material, thereby increasing the pull-out resistance of the rubber material and exhibiting high tensile strength. To do. In the invention according to claim 8, the pressure bearing member effectively disperses the tensile force in the joint width direction in the concrete structural material to prevent the stress concentration of the tensile stress that should support the tensile force, and the pressure bearing member. The tensile stress is exerted by the and locking portions to prevent stress concentration in the rubber material and exert high tensile strength.

The invention according to claims 9 to 11 is intended to maintain good cement around especially in the vicinity of the rubber member, and the invention according to claim 9 is characterized in that the connecting portion and the engaging portion are provided. By forming the joint portion of the above as a continuous smooth curve, the cement can be filled in the vicinity of the rubber member without retaining during the concrete pouring. According to the invention of claim 10, the cement can easily flow into the lower portion of the rubber material from the concrete placing hole,
Makes placing concrete under the rubber material even better and easier. According to the invention of claim 11, when the concrete is poured, the cement can go in and out between the locking portions through the notches, so that the concrete can be stably and satisfactorily placed near the rubber material. You can

According to the twelfth aspect of the present invention, since the cross-sectional area of the joint portion between the connecting portion and the engaging portion is small and can be bent, the mounting angle of the engaging portion with respect to the connecting portion is changed, Even if 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, since the rubber materials continuously provided in the length direction of the joint structure are in close contact with each other and are watertightly joined, the watertightness of the joint structure is ensured even at the joint portion of the rubber members. Can be held at.

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

According to the fifteenth aspect of the present invention, when the deformation energy of the seismic force acts, the high damping rubber absorbs and damps the deformation energy, and after the external force is released, it moves by the restoring force of the high damping rubber. Eliminates displacement of members.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
And FIG. 20. Reference numeral 1 in the figure is a culvert (concrete structure) constructed by connecting concrete pieces (concrete structural material) 2 with the joint structure of the underground concrete structure of the present embodiment. As shown in FIG. 1 and FIG. 3, the culvert 1 has a concrete piece 2 formed in a square tubular shape in cross section in a longitudinal direction with an inner hole 3 communicating with a joint space 1 a of about 10 to 20 mm. It is constructed by connecting each concrete piece 2 with a rubber joint material 4 formed of a high damping rubber to form a joint structure of an underground concrete structure.

As shown in FIGS. 2 and 3, rubber joint material 4
Is a long member having an H-shaped cross section, and is attached in a square shape along the end faces of the concrete pieces 2 and 2 as an embedded state in both end portions of the concrete pieces 2 and 2 to be connected, The concrete pieces 2 and 2 are water-tightly connected. The connecting portion 5 forming the web portion of the rubber joint material 4
Has a central portion exposed to the joint space 1a. The locking portion 6 is formed in a shape that vertically protrudes vertically on both ends of the connecting portion 5, is fixed to the concrete forming the concrete piece 2, and has pull-out resistance against pulling force acting on the rubber joint material 4. Demonstrate. A sheet-shaped joint material 7 made of elastite or the like having water stopping property is interposed in the joint space 1a.

The culvert 1 is constructed as follows. While excavating the portion of the ground where the culvert 1 is to be constructed, install the rubber joint material 4 at the target position in this excavated portion, install the formwork and place concrete to remove one side of the rubber joint material 4 One concrete piece 2 is installed in the buried state. Next, the joint material 7 is installed on the end surface of the constructed concrete piece 2 to which the rubber joint material 4 is attached, and the rubber joint material 4 is installed on the construction part of the concrete piece 2 on the opposite side in contact with the joint material 7. Place concrete. Hereinafter, the culvert 1 is constructed by repeating the above work.

The operation of this embodiment will be described below. According to the joint structure of the underground concrete structure, when the seismic force is applied, the deformation energy acts on each of the concrete pieces 2, 2 ,.
The position of moves. However, the rubber joint material 4 and the joint material 7 which are interposed between the concrete pieces 2, 2, ... Support the compressive force between the concrete pieces 2, 2 ,. Can be maintained. As a result, as shown in FIG. 20, the concrete pieces 2 move horizontally 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,
Since 2, ... Are connected by the rubber joint material 4, even if the seismic force acts on the culvert 1, the rubber joint material 4 attenuates the deformation energy of the seismic force to reduce 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. Further, since the rubber joint material 4 has a history restoring property, after the seismic force is removed, the rubber joint material 4 exerts a high history restoring force and pulls the concrete pieces 2 and 2 back to their original positions. By restoring the original installation position, there is no need to repair the culvert 1 after the action of seismic force.

Another embodiment of the present invention will be described below. Each of the embodiments 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 view, the same components as those in FIGS. The reference numerals are given to simplify the description.

The second embodiment of the present invention will be described below with reference to FIGS. The joint structure of the underground concrete structure of the present embodiment is configured by attaching a rubber joint material 4a formed in a shape having a bulging portion 8 having a rectangular cross section to the joint portion 5 of the rubber joint material 4 at the joint portion. is there. The bulging portion 8 is formed over the entire length of the rubber joint material 4a, is located in the joint space 1a, and the side surface is exposed in the joint space 1a. The joint structure of the underground concrete structure of the present embodiment has a large capacity for damping deformation energy because the connecting portion 5 of the rubber joint material 4a has the bulging portion 8 and has a large resistance to deformation, and thus the displacement of the concrete piece 2 is large. Can be reduced.

Further, as shown in FIG. 5, if an iron plate 9 (highly rigid member) is embedded in the bulging portion 8, the proof stress at the time of an earthquake is improved, and the deformation energy damping capacity is further improved. hand,
The displacement of the concrete piece 2 can be further reduced, and the compressive force is improved so that the concrete piece 2,
It is possible to keep the joint width between 2, ... Further, as shown in FIG. 6, if the lead rod (metal material) 10 is embedded in the rubber joint material 4a, the proof stress and the rubber joint material 4 are exerted by adjusting the size of the cross section of the lead rod 10. It is possible to easily adjust the restoring force to be performed, and it is possible to sufficiently eliminate displacement caused by an earthquake or the like. In addition, as shown in FIG. 7, if a plurality of thin iron plates (thin plate materials) 11 arranged in the bulging portion 8 along the joint length direction are embedded in the joint width direction continuously, Since the frictional resistance between the rubber forming the bulging portion 8 and the thin iron plate 11 against the compressive force in the width direction increases, the bulging deformation of the bulging portion 8 is prevented and the deformation of the rubber joint material 4a is prevented. The displacement of the pieces 2, 2, ... Can be further reduced.

The third embodiment of the present invention will be described below with reference to FIGS. The joint structure of the underground concrete structure of the present embodiment is intended to prevent slipping out, movement of the connecting position, and the like by increasing the proof stress particularly against the tensile force acting in the joint width direction. As shown in FIG.
The first aspect of the present embodiment is that the connecting portion 5 of the rubber joint material 4 is
A rubber joint material 4b formed in a shape having a plurality of locking protrusions 12 is attached to the joint portion. The rubber joint material 4b increases the contact area of the concrete piece 2 with 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 of this aspect 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, and particularly the connecting portion 5 The improvement of the tensile stress at 2 reduces the deformation of the rubber joint material 4b when supporting the tensile force and extends the life of the rubber joint material 4b.

As shown in FIG. 9, in the second mode of the present embodiment, the anchor bolt 13 is attached to the locking portion 6, and the tensile force acting on the rubber joint material 4b is applied via the anchor bolt 13 to the concrete piece 2. It is configured to be transmitted and supported in the body. The joint structure of the underground concrete structure according to this aspect is configured such that 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 the concrete piece 2 is supported. Stress concentration can be prevented,
It is possible to further improve the tensile strength.

As shown in FIG. 10, in the third mode of this embodiment, a reinforcing bar is bent into a U-shape in a through hole 14 formed vertically through the engaging portion 6 of the rubber joint material 4b. It is configured by penetrating the pressure bearing member 15 formed as described above. Bearing member 15
Is installed so that the bent end portion faces the inside of the concrete piece 2 and is embedded and fixed in the concrete of the concrete piece 2. In the joint structure of the underground concrete structure according to this aspect, since the tensile force is dispersed and supported by the locking portion 6 and the bearing member 15, the tensile stress in the rubber joint material 4b is dispersed to prevent stress concentration. If the bearing 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 by using the large concrete piece 2. Can be installed.

A fourth embodiment of the present invention will be described below with reference to FIGS. 11 to 15. The joint structure of the underground concrete structure of the present embodiment is such that, by processing the rubber joint material 4, the circumference of 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. The purpose is to do.

As shown in FIG. 11, the first mode of this embodiment has a shape in which the joint portion of the rubber joint material 4 and the connecting portion 5 and the engaging portion 6 are connected by a smooth curve to eliminate the corner portion. Using the rubber joint material 4c formed in the above, the cast cement is surely filled around the rubber joint material 4c by flowing along the surface of the rubber joint material 4c, and good casting concrete. To form.

As shown in FIGS. 12 and 13, the second embodiment of this embodiment uses a rubber joint material 4d in which a large number of concrete placing holes 16 are vertically provided in the connecting portion 5. . Therefore, in the second aspect, since the cement poured into the portion where the concrete piece 2 is to be constructed flows into the lower portion of the rubber joint material 4d from the concrete placing hole 16, the cement is sufficiently provided even below the rubber joint material 4d. Can be poured into the concrete and the concrete can be satisfactorily placed.

As shown in FIGS. 14 and 15, in the third mode of this embodiment, a large number of parts are provided on the upper part or the lower part of the locking part 6, from the upper and lower ends to the joint part of the locking part 6 with the connecting part 5. The rubber joint material 4e formed by forming the notch 17 is used. As shown in FIG. 15, the notches 17 are continuously provided along the length direction of the locking portion 6 at positions which are staggered in the vertical direction and do not communicate with each other. In the joint structure of the underground concrete structure according to the present embodiment, the cement flowed in to construct the concrete piece 2 freely moves in and out of the rubber joint material 4e above and below the rubber joint material 4e. Even in the vicinity of 4e, free flowing and filling is ensured, so that good concrete pouring is guaranteed.

The fifth embodiment of the present invention will be described below with reference to FIG. The joint structure of the underground concrete structure according to the present embodiment corresponds to the change in the construction direction of the concrete piece 2 by using the rubber joint material 4f formed so that the locking portion 6 can be bent with respect to the connecting portion 5. Is.
FIG. 16 shows a joint structure of an underground concrete structure according to the present embodiment, in which a rubber joint material 4f is formed by joining a connecting portion 5 and a locking portion 6 through a narrow portion 18 having a particularly small cross-sectional area. It is configured using. Further, as shown in the third aspect of the third embodiment, the connecting portion 5 is provided with a through hole 14, and the pressure bearing member 15 is inserted into the through hole 14 to enhance the tensile strength. ing. According to the joint structure of the underground concrete structure of the present embodiment, since the engaging portion 6 is bendable with respect to the connecting portion 5, the engaging portion with respect to the connecting portion 5 corresponding to the installation position of the concrete piece 2. If the angle of 6 is changed, 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 curved. Can be installed. 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 and the work efficiency is improved, and the degree of freedom in the design of the culvert 1 is improved.

A fifth embodiment of the present invention will be described below with reference to FIGS. 17 and 18. As shown in FIG. 17, the joint structure of the underground concrete structure of the present embodiment is a water-tight joint made by wrapping a straight rubber joint material 4h forming one side of the concrete piece 2 in the longitudinal direction to wrap it with concrete. A series of watertight connecting bands are formed along the end face shape of the piece 2.

As shown in FIG. 18, rubber joint materials 4h, 4
In the joint portion of h, the locking portion 6 of one rubber joint material 4h is extended in the length direction of the rubber joint material 4h to form a connecting end portion 19, and the other connecting end portion 19 to be connected is formed. The rubber joint material 4h is welded to the outer surface of the connecting portion 5.
The connection between the connection end portion 19 and the connection portion 5 may be performed by a method other than the above, such as bonding, as long as watertightness is ensured.

In the joint structure of the underground concrete structure according to the present embodiment, the rubber joint material 4h connected in the shape of a rectangular frame connects the inner hole 3 in the joint space 1a in a watertight manner. The rubber joint material 4h absorbs the seismic force and is damped, and while being deformed according to the displacement of the concrete piece 2, it is possible to maintain the watertightness of the joint portion, and there is no need to consider the water blocking effect of the joint material 7, The workability of the structure is improved and the work efficiency of the culvert 1 is improved.

The seventh embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 19, the joint structure of the underground concrete structure of the present embodiment has a rubber joint material 4i integrally formed with a cushioning portion 20 to be interposed between the concrete pieces 2 and 2 and the concrete pieces 2 and 2. It is configured to be installed between. The rubber joint material 4i is formed in a shape in which a buffer portion 20 formed in a plate shape having substantially the same shape as the end surface of the concrete piece 2 is provided at the center of the connecting portion 5 of the rubber joint material 4 having an H-shaped cross section. ing. Buffer unit 2
In No. 0, the end faces of the concrete pieces 2 and 2 are in contact with and sandwiched between the left and right sides.

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 joint material 7 can be easily positioned 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 the underground concrete structure of the present invention, a pair of concrete structure members continuously connected to each other through a space serving as a joint are connected by a rubber material. The rubber material is composed of a locking portion formed by forming protrusions on both ends of the cross section and a connecting portion connecting the locking portion,
It is characterized in that it extends over the entire length of the joint, and the locking portions are embedded and attached to both of the concrete structural materials, so that the fluctuation energy is attenuated when the seismic force acts and the concrete structural materials are damped. In addition to reducing the displacement of the rubber, the rubber material is deformed according to the displacement of the concrete structural material, and the joint structure can be retained.

According to the joint structure of the underground concrete structure according to the second aspect, the rubber material is formed into a shape having a bulging portion at the connecting portion, and the bulging portion is located in the space serving as the joint. Since it is characterized in that it is attached by being attached, the proof stress against earthquake force is improved, and it becomes possible to reduce the displacement of the concrete structural material and maintain the joint structure in a larger concrete structure.

According to the joint structure of the underground concrete structure according to the third aspect, a high-rigidity member having a projection at at least one end is embedded between the bulging portion and each locking portion. Since it is characterized, it becomes possible to further increase the proof stress against the seismic force.

According to the joint structure of the underground concrete structure of the present invention, a flexible metal material is embedded between the bulging portion and each locking portion.
By adjusting the strength of the metal material, it is possible to eliminate the displacement of the concrete structure material due to the seismic force by the restoring force of the rubber material, and it is possible to easily adjust the yield strength of the rubber material.

According to the joint structure of the underground concrete structure of the fifth aspect, a plurality of thin plate members are continuously arranged in the joint in the joint width direction, and each thin plate member is arranged in the joint length direction. Since it is arranged along the width of the bulging portion, the frictional force between the rubber forming the bulging portion and the thin plate material in the width direction of the bulging portion increases, and the bulging portion deforms in the width direction when a compressive force is applied. Can be prevented.

According to the joint structure of the underground concrete structure according to claim 6, a large number of locking projections are projected at the connecting portion of the rubber material, so that the connecting portion and the concrete structural material are formed. The area of adhesion to the concrete that is used 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 that extends into the concrete structural material and supports a tensile force acting on the rubber material is attached to the locking portion. Since it is characterized, it is possible to disperse the tensile force in the concrete structure material via the anchor member, prevent the stress concentration, and further improve the tensile strength of the rubber material.

According to the joint structure of the underground concrete structure of the present invention, a bearing member formed in a shape projecting from the rubber material in a through hole penetrating the connecting portion of the locking portion of the rubber material. Is inserted, and since the pressure-bearing member is fixed in the concrete structural material, the rubber material disperses and supports the tensile force through the locking portion and the pressure-bearing member,
Since the stress can be further dispersed, it can be applied to a concrete structure using a large-scale concrete structural material.

According to the joint structure of the underground concrete structure of the present invention, the rubber material is formed in a shape in which the engaging portion and the connecting portion are connected by a continuous curve. 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 of the tenth aspect of the invention, a large number of concrete placing holes are vertically formed in the connecting portion of the rubber material. The cement poured into the construction position flows into the lower part of the rubber material through the concrete pouring hole, so that the concrete can be satisfactorily poured into the lower part of the rubber material easily.

According to the joint structure of the underground concrete structure of the present invention, a plurality of notches are formed in the rubber material at positions above or below the engaging portion that do not communicate with each other. The cement poured into the construction position of the concrete structure material can freely move in and out of the rubber material through the notches, 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 of the present invention, the rubber material is formed such that the attachment portion of the engaging portion and the connecting portion has a sectional area smaller than that of the engaging portion and the connecting portion. Therefore, even if the locking part can be bent in the desired direction with respect to the connection part and the concrete structure materials are connected at an angle, the tensile force acting between the concrete structure materials can be supported. It can be suitably installed in a concrete structural material, construction of various concrete structures is possible, and the degree of freedom in design can be improved.

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 is connected continuously in the length direction of the joint. It is characterized in that the connection part of the rubber material of the above is fixed to the other connection part in a superposed state, so that the concrete structure materials are watertightly enclosed in the joint part, and the rubber material is against the displacement due to the seismic force of the concrete structure material. Can be deformed, and the watertightness can be reliably maintained.

According to the joint structure of the underground concrete structure according to claim 14, the rubber material is formed integrally with the cushioning portion to be interposed between the concrete structure materials. Therefore, the joint construction is performed. The number of steps is reduced, and the positioning of the cushioning section is facilitated and accurate, which improves the construction efficiency and construction accuracy of the concrete structure.

According to the joint structure of the underground concrete structure described in claim 15, 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. By returning the concrete structural member to its original position to reduce the displacement, it is possible to reduce the repair work of the concrete structure due to the action of the seismic force.

[Brief description of 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 along the line AA of FIG.

FIG. 4 is an enlarged side view of a joint portion showing one aspect 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 portion showing the other aspect.

FIG. 7 is an enlarged side view of a joint portion showing the other aspect.

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

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

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

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

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

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

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

FIG. 15 is an enlarged view showing the cutout.

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

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

FIG. 21 is a diagram showing the 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 structure material) 4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4
h, 4i Rubber joint material 5 Connection portion 6 Locking portion 7 Joint material 8 Swelling portion 9 Iron plate (high rigidity member) 10 Lead bar (metal material) 11 Thin iron plate (thin plate material) 12 Locking protrusion 13 Anchor bolt 14 Through Hole 15 Bearing member 16 Concrete pouring hole 17 Notch 18 Narrow space 19 Continuous end 20 Buffer part

Claims (15)

[Claims] 1. A joint structure of a concrete structure to be constructed in the ground, wherein a pair of concrete structure materials continuously connected to each other through a space serving as the joint is connected by a rubber material. Has a connecting portion that connects the locking portion and the locking portion formed by forming protrusions at both ends of the cross section, and extends over the entire length direction of the joint, and the locking portion is provided in each of the both concrete structure materials. A joint structure for an underground concrete structure, which is characterized in that it is embedded in and attached to. 2. The joint structure of the underground concrete structure according to claim 1, wherein the rubber material has a bulging portion at a connecting portion, and the bulging portion is positioned in the space serving as the joint. Joint structure of an underground concrete structure characterized by being installed. 3. The joint structure of the underground concrete structure according to claim 2, wherein a high-rigidity member having a projection at at least one end is embedded between the bulging portion and each locking portion. The joint structure of the underground concrete structure, which is characterized by 4. The joint structure of the underground concrete structure according to claim 2, wherein a flexible metal material is embedded between the bulging portion and each locking portion. Joint structure of underground concrete structure. 5. The joint structure of the underground concrete structure according to claim 2, wherein a plurality of thin plate members are continuously arranged in the joint in the joint width direction, and each thin plate member has a joint length. Joint structure of underground concrete structure characterized by being arranged along the direction. 6. The joint structure of the underground concrete structure according to claim 1, wherein a large number of locking protrusions are projected between the locking portions of the rubber material. Structure joint structure. 7. The joint structure of the underground concrete structure according to claim 1, wherein an anchor member that extends into the concrete structural material and supports a tensile force acting on the rubber material is attached to the locking portion. The joint structure of the underground concrete structure characterized by being provided. 8. The joint structure for an underground concrete structure according to claim 1, wherein a support formed in a shape projecting from the rubber material in a through hole penetrating the connecting portion of the locking portion of the rubber material. A joint structure for an underground concrete structure, in which a pressure member is inserted and the bearing member is fixed in the concrete structure material. 9. The joint structure of the underground concrete structure according to claim 1, wherein the rubber material is formed in a shape in which the engaging portion and the connecting portion are connected by a continuous curve. The joint structure of the characteristic underground concrete structure. 10. The joint structure of the underground concrete structure according to claim 1, wherein a large number of concrete placing holes are vertically provided between the locking portions of the rubber material. Joint structure of underground concrete structure. 11. The joint structure of the underground concrete structure according to claim 1, wherein the rubber material has a plurality of notches formed at positions above or below the engaging portion that do not communicate with each other. The joint structure of the characteristic underground concrete structure. 12. The joint structure of an underground concrete structure according to claim 1, wherein the rubber member is formed such that a mounting portion of the engaging portion and the connecting portion has a cross-sectional area smaller than that of the engaging portion and the connecting portion. The joint structure of the underground concrete structure characterized by being present. 13. The joint structure of an underground concrete structure according to claim 1, wherein the rubber member is formed such that a connecting portion is extended in the joint length direction and is continuously provided in the joint length direction. A joint structure of an underground concrete structure, in which a connecting portion of one rubber material is fixed to another connecting portion in a superposed state. 14. The joint structure of the underground concrete structure according to claim 1, wherein a rubber material is integrally formed with a buffer portion to be interposed between the concrete structure materials. Structure joint structure. 15. The method according to any one of claims 1, 2, 3, 4, 5, 6,
The joint structure of the underground concrete structure according to 7, 8, 9, 10, 11, 12, 13 or 14, wherein the rubber material is formed of a high damping rubber having a high hysteresis restoring force. Joint structure of underground concrete structure.