TW201321582A - Joining method of concrete structure - Google Patents

Abstract

A plurality of box culverts 1 which are concrete structures, each having a cylindrical cross-section, are laid separately from each other only by a predetermined dimension, a backup seal material 22 made of a non-polar substance is installed at a portion separated from an inner surface of the box culvert 1, and an adhesive 21 having stretch capacity of 100 to 250% and density of 0.8 to 1.0 g/cm<SP>3</SP> is poured into a space between the surface of the backup seal material 22 and the inner surface of the box culvert 1 so as to form a joint portion 2.

Description

Method of joining concrete structures

The present invention relates to a joining method of a concrete structure in which a concrete structure having a tubular shape or a U-shaped cross-sectional shape is joined.

Conventionally, various methods have been employed for the method of laying a concrete structure having a tubular shape or a U-shaped cross section. For example, the method to be considered (for example, refer to Patent Document 1) is a gasket having a water-repellent property such as a rubber having a corrugated shape attached to the outer periphery of a fitting convex portion provided at an end portion of a concrete structure, that is, a concrete product. The sheet is engaged with the concave portion of the existing concrete product, and is brought into close contact with a proximity means such as a turnbuckle to fit the rubber to the concave portion. In addition, a method of considering a method is to provide a groove portion for fitting in the vicinity of the center of the top plate, the side wall, and the thickness of the bottom plate of the concrete structure, that is, the end portion of the concrete product, and the belt-shaped rubber member which is formed into an arrow shape by a hammer or the like. One of the arrow-shaped portions is embedded in the groove portion, and the other arrow-shaped portion is engaged with the fitting groove portion of the adjacent concrete product, and is approached by an approach means such as a turnbuckle. The arrow-shaped portion is fitted into the groove portion for fitting, and then the slurry is injected into the groove for fitting from the hose for injecting the slurry to the concrete product. In the case of the drop type construction, the conventional method is a method in which the partition between the concrete products adjacent to each other is laid by the concrete that is driven in the field. And when there is an offset or crack in the existing concrete structure. As A method for recovering functions such as continuity or watertightness is to consider a method of installing a flexible joint every predetermined interval.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-61266

However, a method of fitting the rubber attached to the fitting convex portion provided at the end of the concrete product to the concave portion of the adjacent concrete product by using the above-mentioned approaching means such as a turnbuckle or the like, Or a method of embedding an arrow-shaped portion of a belt-shaped rubber member having an arrow shape on both sides in a fitting groove portion provided in a concrete product, although the performance can be ensured when the concrete product is laid, but there is still a post-laying Unable to correspond to the problem.

In the above-described drop-type construction, the method of laying by the concrete that is driven in the field, and the adjacent concrete products are rigidly connected, there is a problem that the grounding of the ground may not be corresponding to the subsequent sinking or earthquake.

In addition, as described above, when the existing concrete structure is offset or cracked, the method of installing the flexible joint at every predetermined interval in order to restore the function of continuity or watertightness, etc., since the flexible joint is very expensive, Therefore, there is a problem that the repair cost is very high.

The present invention has been made in view of the above points, and an object thereof is to solve the above problems.

That is, in one of the joining methods of the concrete structure of the present invention, a concrete structure having a cross-sectional shape of a cylindrical shape or a U-shape is formed by dividing a plurality of concrete structures into a predetermined size and being placed inside the concrete structure. The surface partitioning portion is provided with a support material of a non-polar material, and a space between the surface of the support material and the inner surface of the concrete structure is injected by: an elongation of 100% to 250% and a density of 0.8 to 1.0 g/ A bonding agent of cm ³ to form a joint.

According to this method, since the density of the adhesive is small, the adhesive does not fall during construction, and the workability is excellent. Since the stretching ability is excellent, even when the displacement of the ground is caused by a different sinking or earthquake, the bonding portion is followed to be deformed, and continuity or watertightness can be ensured. In other words, it is possible to inexpensively and easily add shock resistance, continuity, or watertightness by using a water passage or a passage such as a sewer of a concrete structure having a tubular shape or a U-shaped cross section.

With such an adhesive, it is suitable for the thickness of the adhesive layer capable of ensuring continuity or watertightness, that is, the depth of the space between the surface of the support material and the inner surface of the concrete structure, for example, a concrete structure. The separation width between the 0.75 and 1.25 times.

As a form suitable for positioning the above-mentioned support material, for example, an outer support member is disposed outside the support member.

In another one of the joining methods of the concrete structure of the present invention, the concrete structure is provided in a tubular shape or a U-shaped cross-sectional shape, and a groove is formed on the entire inner surface of the concrete structure. A portion of the groove that is separated from the inner surface of the concrete structure is provided with a support material of a non-polar material, and a space between the surface of the support material and the inner surface of the concrete structure is injected by: the elongation capability is 100%~ An adhesive of 250% and a density of 0.8 to 1.0 g/cm ³ to form a joint.

By this method, the most important effect of the above-mentioned invention is that it can be obtained; the adhesive does not fall during construction and the workability is excellent, even when the displacement of the ground is different when sinking or earthquake occurs, the stickiness The joint portion is deformed to follow, and an effect of continuity or watertightness and an effect of attaching shock resistance, continuity, or watertightness to the concrete structure at low cost and easily can be ensured.

In a preferred embodiment of the joining method, the concrete structure provided as described above is formed by, for example, laying a plurality of concrete products having a tubular shape or a U-shaped cross section.

As a preferred embodiment of the joining method, for example, the groove is formed on the inner surface of the joint portion of the concrete products adjacent to each other. Therefore, by applying the present invention to the joint portion of the existing structure in which the concrete structure is placed in a plurality of adjacent manners, the traffic route is not blocked, and the shock resistance, continuity, or Watertightness is attached to the existing structure.

As a preferred embodiment of the joining method, for example, the groove is formed on the inner surface of the concrete structure at the damaged portion. In this way, the damage is not blocked, and the damaged portion is repaired at a required time, and the shock resistance, continuity, or watertightness can be added to the existing configuration. Creation.

According to the present invention, it is possible to inexpensively and easily add shock resistance, continuity, or watertightness to a concrete structure having a tubular shape or a U-shaped cross section.

The first embodiment of the present invention will be described below with reference to Figs. 1 to 6 .

The joining method of the concrete structure of the present embodiment is a subterranean structure such as a concrete structure in which the cross-sectional shape is a square tubular shape, more specifically, a concrete product, that is, a sewer formed by a plurality of box-type underdrains. As shown in Fig. 1 and Fig. 2, it is used when a new box type culvert 1 is provided between the existing box culverts 1'. The new box type culverts 1 are respectively laid apart from the adjacent box-type underdrains 1' which are provided adjacent to each other by a predetermined partition width w, and are joined to the existing box type culvert 1' via the joint portion 2.

The box type culvert 1, as shown in Fig. 3, has a pair of side plates 12, a master plate 11 continuous with the pair of side plates 12, and a top plate 13 whose position is opposite to the bottom plate 11 in the present embodiment; The internal space 1s partitioned by the side plate 12, the bottom plate 11, and the top plate 13 is built in a rectangular tube shape having a rectangular cross section, and has a joint surface 1a at both ends in the longitudinal direction; The underground structure is constructed by joining a plurality of the joint surfaces 1a and joining them. The joint surface 1a has a rectangular outer shape and a large inner peripheral shape. It is rectangular and has a quadrangular annular shape. In the present embodiment, as shown in the figure, a square-shaped concrete product, that is, a box type culvert 1, is described. However, the present invention is also applicable to a section in which the upper open section is viewed as a U by a pair of side plates and a bottom plate. The shaped concrete products form a three-sided waterway.

The joining method of the box type culvert 1 of the concrete product of the present invention is to form the joint portion 2 formed by the adhesive 21 between the joint faces 1a of the box type culvert 1 having the joint faces 1a at opposite ends. A method of joining joined concrete articles. The method of forming the joint portion 2 will be described in detail below together with the description of the structure of each portion.

The joint portion 2 is formed between the adjacent box-shaped underdrains 1 as shown in the above or the fourth and sixth figures, and the outer support member is disposed from the outer surface side toward the inner surface side of the box type culvert 1 23. The inner support material is a support seal member 22 and an adhesive 21 formed by a non-polar substance.

More specifically, the outer support member 23 is disposed from the plane connecting the outer surfaces of the adjacent box-type underdrains 1 to the inner surface of the box-type underdrain 1 as shown in Figs. 4 and 6 . An area separated by a position outside the predetermined distance. The outer support member 23 has a function of positioning an edge portion of the outer side of the support seal member 22. In the present embodiment, after the outer support member 23 is disposed between the adjacent box-shaped underdrains 1, the support seal member 22 is disposed inside. The outer support member 23 does not necessarily need to be provided.

The support sealing member 22, as described above, or as shown in Figs. 4 and 6 is disposed on the inner side of the outer support member 23, and is an annular member having substantially the same thickness dimension covering the entire region, formed by a non-polar substance. . From the The inner surface of the support seal member 22 and the space 2s between the planes connecting the inner surfaces of the box type culvert 1 are injected with an adhesive 21 for joining the box type culverts 1 to each other. The depth d of the space 2 s, that is, the distance from the inner surface of the support seal member 22 to the plane connecting the inner surfaces of the box culvert 1 to each other, is set to be 0.75 to 1.25 times the partition width w.

As described above, the adhesive agent 21 is injected into the inside of the support seal member 22 as shown in the fourth and sixth drawings, and has a box type culvert 1 which is adjacent to each other via the adhesive agent 21 indirectly. Combined function. That is, the adhesive 21 is disposed at a position facing the inner space of the box type culvert 1. The adhesive 21 has an elongation of 100% to 250% and a density of 0.8 to 1.0 g/cm ³ .

In other words, when the adjacent box culverts 1 are joined, the space between the box culverts 1 is first disposed as shown in Fig. 5, and the support member 22 is placed inside. Further, as shown in Fig. 6, the adhesive 21 is injected into the inside of the support seal member 22, and the standby process is performed before the adhesive 21 is cured. When the adhesive 21 is injected, the masking process is performed by attaching a masking tape or the like to a portion adjacent to the space 2s on the inner surface of the box culvert 1 to omit the bonding. After the agent 21 is cured, the masking is removed by a method such as removing the masking tape. Further, after the formation of the waterway, when the grounding of the different sinking or earthquake occurs, the continuity or watertightness between the adjacent tank culverts 1 is maintained by deforming the layer provided with the adhesive 21. Sex.

As described above, with the joining method of the present embodiment, the displacement of the ground plate when different sinking or earthquakes are generated is accompanied by the space between the box type culverts 1, 1' When the relative position changes, the bonding portion of the adhesive 21 follows the deformation to ensure continuity or watertightness. In other words, it is possible to inexpensively and easily add shock resistance, continuity, or watertightness to a structure such as a water passage or a passage such as a sewer of a concrete product represented by a box-shaped culvert 1 and 1' having a rectangular cross-sectional shape. Sex.

According to this joining method, since a primer is not required, the steps can be reduced and the construction period can be shortened.

According to this construction method, if one of the box culverts 1 constituting the structure is replaced, the joint portion 2 is formed on both sides of the box culvert 1, and the earthquake resistance can be added to the structure at a required time. , continuity or water tightness.

Next, a second embodiment of the present invention will be described below with reference to FIGS. 7 to 12.

The joining method of the concrete structure of the present embodiment is a subterranean structure such as a sewer formed by connecting a plurality of concrete structures having a rectangular cross-sectional shape, that is, the box culvert A1, to each other. There are both the joint portions of the arranged box type culverts A1.

The box type culvert A1 has substantially the same structure as the box type culvert 1 of the above-described first embodiment. That is, as shown in Fig. 7, there are: a pair of side plates A12, a bottom plate A11 continuous with the pair of side plates A12, and a top plate A13 whose position is opposite to the bottom plate A11; The inner space A1s partitioned by the side plate A12, the bottom plate A11, and the top plate A13 is a square tube type having a rectangular cross section. The box type culvert A1 has a joint surface A1s at both ends in the longitudinal direction, and a plurality of joint surfaces A1a are formed thereon. Joining and joining to construct underground structures. The joint surface A1a has a rectangular outer shape and a substantially rectangular outer shape, and has a quadrangular annular shape. In the present embodiment, the notch A1t shown in FIGS. 10 and 12 is provided over the entire circumference of the joint surface A1a with respect to the portion of the internal space A1s. In the present embodiment, the square-shaped concrete product, that is, the box type culvert A1, is illustrated as shown in the drawings, but the present invention is also applicable to a cross-sectional view in which the upper side is opened by the pair of side plates A12 and the bottom plate A11. It is a U-shaped concrete product to form a three-sided waterway. The concept of "the cross-sectional shape is a square tube shape" includes the fact that the inner surface of the bottom plate A11 protrudes into a circular shape in cross section.

The joining method of the box type culvert A1 of the concrete product of the present invention is to form the joint portion A2 formed by the adhesive A21 between the joint surface A1a of the box type culvert A1 having the joint surface A1a at both opposite ends. A method of joining joined concrete articles. The method of forming the joint portion A2 will be described in detail below together with the description of the structure of each portion.

As described above or in Fig. 12, the joint portion A2 is formed between the notches A1t of the box culvert A1 adjacent to each other, from the outer surface side of the box culvert A1 toward the inner surface side, as shown in Figs. 8 and 12 As shown, the support material, that is, the support sealing material A22 and the adhesive A21 formed by the non-polar substance, are respectively disposed. The notch A1t is formed by forming a notch of the existing box culvert A1 by a concrete cutter or the like. That is, the distance w2 between the side faces of the mutually opposing notches A1t of the adjacent box culverts A1 as shown in Fig. 10 is larger than that between the existing box-type culverts A1 as shown in Fig. 9. Distance w20.

The support seal member A22, as shown in Figs. 8 and 12, is an annular member having substantially the same thickness dimension in the entire region, and is formed of a non-polar substance. The support seal member A22 is disposed in a state of being added to the bottom surface of the notch A1t. On the inner surface of the support seal member A22, the space A2s between the planes connecting the inner surfaces of the box culvert A1 are injected with the adhesive A21 for joining the box culverts A1 to each other. Here, the distance from the inner surface of the support seal member A22 to the plane connecting the inner faces of the box culvert A1, that is, the depth d2 of the space A2s for arranging the adhesive A21, is set as: The width of A2s is also 0.75 to 1.25 times the distance w2 between the side faces of the gaps A1t facing each other.

The adhesive A21 has substantially the same structure as that of the first embodiment described above, and is disposed substantially the same. In other words, the adhesive A21 is injected into the inside of the support seal member A22 as described above or as shown in Figs. 8 and 12, and has a case in which the adhesive A21 is adjacent to each other via the adhesive A21. The function of joint between the culverts A1. In other words, the adhesive A21 is disposed at a position facing the inner space of the box type culvert A1. The adhesive A21 has an elongation of 100% to 250% and a density of 0.8 to 1.0 g/cm ³ .

In other words, in the present embodiment, when the adjacent box culverts A1 are joined, the notches A1t are formed as shown in Fig. 10, respectively, in the mutually opposing joint faces A1a of the box culverts A1 adjacent to each other. As shown in Fig. 11, a supporting seal member A22 is added to the bottom surface of the notch A1t, and as shown in Fig. 12, the adhesive A21 is injected into the inside of the support seal member A22, and the standby process is performed before the adhesive A21 is cured. And when the adhesive A21 At the time of injection, the same masking process as that of the above-described first embodiment is performed. In the present embodiment, after the water path is formed, when the ground plate is displaced at a different sinking or earthquake, the layer-type culvert A1 adjacent to each other is maintained by deforming the layer provided with the adhesive A21. Continuity or water tightness.

As described above, with the joining method of the present embodiment, when the displacement of the land at the time of different sinking or earthquake is generated, the bonding portion of the adhesive A21 follows the deformation to ensure continuity or watertightness. In other words, it is possible to inexpensively and easily add shock resistance, continuity, or watertightness to a structure such as a water passage or a passage such as a sewer having a rectangular tubular shape or a U-shaped concrete product.

According to this joining method, since a primer is not required, the steps can be reduced and the construction period can be shortened.

According to this construction method, since all the operations for forming the joint portion A2 are performed inside the box type culvert A1 constituting the existing structure, no special fine processing or treatment is required, and the box type culvert A1 is used. The formed structure is provided so that the long-term road traffic can be not blocked during the required period, and the structure is attached with shock resistance, continuity or watertightness.

Next, a third embodiment of the present invention will be described below with reference to FIGS. 13 to 15.

The joining method of the concrete structure according to the present embodiment is a subterranean structure such as a sewer formed by connecting a plurality of concrete structures having a rectangular cross-sectional shape, that is, a rectangular tubular shape, that is, the box culvert B1. A box type culvert B1 with a set underground structure is implemented in the production The fracture portion B1x of the crack such as the crack shown in Fig. 13 . The joining method will be described below together with the configuration of each part. In the present embodiment, the square-shaped concrete product, that is, the box type culvert B1, is illustrated as shown in the drawings. However, the present invention is also applicable to a configuration in which the upper open section is viewed as a U by a pair of side plates and a bottom plate. The shaped concrete products form a three-sided waterway. And the present invention is also applicable to a structure formed by driving concrete into the field.

In the present embodiment, as shown in FIG. 14, the rupture portion B1x is provided with a notch B1t on the inner surface side of the rupture portion, and the notch B1t has a larger width dimension w3 than the rupture portion B1x. In the inside of the notch, as shown in Fig. 15, as shown in Fig. 15, a joint portion B2 is provided from the outer surface side toward the inner surface side of the box type culvert B1, and the joint portion B2 is disposed separately: It is formed by a supporting material, that is, a supporting sealing material B22 formed of a non-polar substance, and an adhesive B21. The notch B1t is formed by notching the existing box-shaped culvert B1 by a concrete cutter or the like.

As described above or in FIG. 15, the joint portion B2 is formed inside the notch formed in the broken portion of the box type culvert B1, and is disposed from the outer surface side toward the inner surface side of the box type culvert B1. The sealing material B22 and the adhesive B21 are formed. The notch B1t is formed by notching the existing box-shaped culvert B1 by a concrete cutter or the like.

The above-mentioned supporting sealing material B22, as shown in Fig. 15, is a member which covers substantially the same thickness dimension in the entire region and is formed by a non-polar substance. to make. The support seal member B22 is disposed in a state of being added to the bottom surface of the notch B1t. On the inner surface of the support seal member B22 and the space B2s between the inner surface of the box culvert B1, as shown in Fig. 15, an adhesive for joining the rupture portion B1x of the box culvert B1 is injected. B21. The depth of the space B2s, that is, the distance d3 from the inner surface of the support seal member B22 to the inner surface of the box culvert B1 is set to be 0.75 to 1.25 times the width dimension w3 of the notch B1t.

The adhesive B21 has substantially the same structure as that of the first embodiment described above, and is disposed substantially the same. In other words, as shown in Fig. 15, the adhesive B21 is injected into the inside of the support seal member B22 as described above, and has a function of joining the crack portion B1x of the box type culvert B1. In other words, the adhesive B21 is disposed at a position facing the internal space B1s of the box type culvert B1. The adhesive B21 has an elongation of 100% to 250% and a density of 0.8 to 1.0 g/cm ³ .

That is, in the present embodiment, when the adjacent box type culvert B1 is joined, a portion where one of the top plate, the side wall, and the bottom plate of the box type culvert B1 in which the existing pipe is formed is broken is formed by A cutting tool such as a concrete cutter, as shown in Fig. 14, forms the notch B1t, and as shown in Fig. 15, a supporting seal member B22 is added to the bottom surface of the notch B1t, and the inside of the support seal member B22 is injected and bonded. Agent B21, a procedure for performing standby before the adhesive B21 is cured. When the adhesive B21 is injected, the same masking process as in the first embodiment described above is performed. In the present embodiment, after the water path is formed, when the ground is displaced at a different sink or earthquake, the layers provided with the adhesive B21 are deformed to maintain each other. Continuity or water tightness between adjacent box culverts B1.

As described above, with the joining method of the present embodiment, when the displacement of the land at the time of different sinking or earthquake is generated, the bonding portion of the adhesive B21 follows the deformation to ensure continuity or watertightness. In other words, it is possible to inexpensively and easily add shock resistance, continuity, or watertightness to a structure such as a water passage or a passage such as a sewer of a concrete product having a rectangular or U-shaped cross-sectional shape.

According to this joining method, since a primer is not required, the steps can be reduced and the construction period can be shortened.

According to this construction method, since all the operations for forming the joint portion B2 are performed inside the box type culvert B1 constituting the existing structure, no special fine processing or treatment is required, and the box type culvert B1 is used. The formed structure or the existing structure formed by the concrete being driven into the concrete can repair the broken portion B1x of the structure without blocking the long-term road traffic during the required period, and is attached Shock resistance, continuity or water tightness.

The invention is not limited to the embodiments described above.

For example, as shown in Figs. 16 and 17, the joining method of the present invention may be employed in the joint portion between the box culvert C1 and the manhole C3.

In the joint portion C2 of this type, a space formed between the box culvert C1 and the manhole C3 below is arranged to support the seal member C22 and the adhesive C21 from the outer surface side of the manhole C3. The support seal member C22 of this type is a rod-shaped member that is circular in cross section, and is disposed adjacent to each other in the depth direction of the space. In this form, a sheet-like cover material C24 made of, for example, rubber is attached to the outside of the manhole C3, and the support seal member C22 is covered. On the other hand, in the adhesive C21, as in the first to third embodiments, an adhesive having an elongation of 100% to 250% and a density of 0.8 to 1.0 g/cm ³ is used. Further, a notch C3a is provided between the pipe inner bottom C31 provided at the bottom of the manhole C3, and a gasket C25 formed by foaming styrene is inserted into the notch C3a. Further, above the spacer C25, a mortar C26 is filled in order to make the upper surface thereof flush with the upper surface of the duct inner bottom C31.

In this type of joining method, when the displacement of the ground at the time of different sinking or earthquake is generated, the bonding portion of the adhesive C21 follows the deformation to ensure continuity or watertightness. In other words, in the joint portion between the box culvert C1 and the manhole C3, shock resistance, continuity, or watertightness can be added inexpensively and easily.

When the joint portion is formed in this configuration, all the work can be performed inside the manhole C3. Therefore, it is possible to prevent the long-term road traffic from being attached to the earthquake resistance, the continuity, or the watertightness in a required period of time.

In addition, by laying a plurality of concrete structures previously formed before the laying of a box culvert or the like, and at the time of construction of the newly formed structure, the joint between the concrete products adjacent to each other is of course The joining method of the first embodiment of the present invention can be employed.

Further, the present invention is also not limited to a structure in which a plurality of concrete structures previously formed before laying are connected, and a structure in which concrete is driven in the field is also applied. In other words, a concrete structure is formed by injecting concrete into the site, and a gap is provided between the concrete structures adjacent to each other, and the joining method of the second embodiment described above The joint between the concrete structures may be joined by the joining method of the third embodiment described above, and the damaged portion of the structure that is hit into the concrete at the site may be joined. In addition, concrete is inserted into the concrete to form a concrete structure that is provided in the whole, and a joining method is adopted in which a groove is formed on the entire circumference of the inner surface, and a supporting sealing material is disposed on the bottom surface side of the groove, and The support sealing material may be filled with an adhesive on the side opposite to the bottom surface of the groove. The cross-sectional shape is not limited to a rectangular structure, and the present invention is also applicable to structures having other shapes such as a circular shape or a semi-circular shape.

Further, various modifications can be made without departing from the spirit and scope of the invention.

1. A1, B1, C1‧‧‧ box culverts (concrete products)

2, A2, B2, C2‧‧‧ joint

21, A21, B21, C21‧‧‧ adhesive

22, A22, B22, C22‧‧‧ support sealing material

Fig. 1 is a view showing a form of installation of a concrete structure according to a first embodiment of the present invention.

Fig. 2 is a central longitudinal sectional view showing a structure formed by the concrete structure of the embodiment.

Fig. 3 is a cross-sectional view showing the concrete structure of the embodiment.

Fig. 4 is a cross-sectional view taken along line A-A of Fig. 2.

Fig. 5 is a view for explaining the installation type of the joint portion of the embodiment.

Fig. 6 is a cross-sectional view taken along line B-B of Fig. 4.

Fig. 7 is a cross-sectional view showing a concrete structure according to a second embodiment of the present invention.

Fig. 8 is a central longitudinal sectional view showing the joint portion of the embodiment.

Fig. 9 is a view for explaining the installation type of the joint portion of the embodiment.

Fig. 10 is a view for explaining the installation type of the joint portion of the embodiment.

Fig. 11 is a view for explaining the installation type of the joint portion of the embodiment.

Figure 12 is a cross-sectional view taken along line C-C of Figure 8.

Fig. 13 is a view showing a broken portion of a concrete structure according to a third embodiment of the present invention.

Fig. 14 is a view for explaining the installation type of the joint portion of the embodiment.

Fig. 15 is a central longitudinal sectional view showing the joint portion of the embodiment.

Fig. 16 is a view showing a form of installation of a concrete structure according to another embodiment of the present invention.

Fig. 17 is a cross-sectional view showing the joint portion of the embodiment.

1‧‧‧ Box culvert (concrete products)

1a‧‧‧ joint surface

1'‧‧‧ Box culvert (concrete products)

21‧‧‧Adhesive

22‧‧‧Support sealing material

23‧‧‧External support

Claims (8)

A method for joining concrete structures, characterized in that a concrete structure having a cross-sectional shape of a cylindrical shape or a U-shape is provided with a plurality of concrete structures separated by a predetermined size, and a portion separated from an inner surface of the concrete structure is provided A support material for a polar substance is injected with an adhesive having an elongation of 100% to 250% and a density of 0.8 to 1.0 g/cm ³ by a space between the surface of the support and the inner surface of the concrete structure. To form the joint. The method of joining concrete structures according to claim 1, wherein the depth of the space is 0.75 to 1.25 times the separation width between the concrete structures. A joining method of a concrete structure according to claim 1, wherein an outer support member is disposed outside the support member. A method for joining concrete structures, characterized in that: a concrete structure provided in a tubular shape or a U-shaped cross-sectional shape, a groove is formed in an entire circumference of an inner surface of the concrete structure, and a groove is formed in the groove a portion of the support material that is separated from the inner surface of the concrete structure is provided with a support material of a non-polar material, and the space between the surface of the support material and the inner surface of the concrete structure is injected: the elongation capability is 100% to 250%. An adhesive having a density of 0.8 to 1.0 g/cm ³ is used to form a joint. A method of joining concrete structures according to claim 4, wherein the concrete structure provided as described above is formed by laying a plurality of concrete products having a tubular shape or a U-shaped cross-sectional shape. The joint of concrete structures such as claim 5 In the method, the groove is formed on an inner surface of a joint portion of the concrete products adjacent to each other. A joining method of a concrete structure according to claim 4, wherein the groove is formed in the damaged portion on the inner surface of the concrete structure. A method of joining concrete structures according to claim 4, wherein the depth of the space is 0.75 to 1.25 times the width of the space.