JP3852181B2 - Joint structure of anticorrosion coated concrete structural member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of an anticorrosion-coated concrete structural member, and more particularly to a joint structure employed when a plurality of concrete structural members having an anticorrosion coating layer on a surface thereof are continuously integrated.
[0002]
[Prior art]
For example, as a corrosion prevention method for a concrete structure that comes into contact with corrosive water such as a sewer, a resin material such as an epoxy resin is applied to the concrete surface, or a precast structural member such as a segment constituting the concrete structure is manufactured. There is a method of anti-corrosion coating on the concrete surface by attaching a corrosion-resistant resin panel or resin sheet to the formwork of the concrete surface and placing the concrete, or by applying a resin material after the placed concrete is cured It has been adopted.
[0003]
In addition, even when a concrete structure is formed by in-situ concrete, a method for preventing corrosion by forming an anticorrosion coating layer on the surface with a resin material or the like is employed.
[0004]
A concrete structure such as a shield tunnel lining body is formed by integrating a plurality of precast structural members such as concrete segments in succession, or by casting cast-in-place concrete. The joint portion of the concrete structural member also needs to be provided with an anticorrosion coating in the field.
[0005]
And as a corrosion prevention method of such a joint, after forming a concrete structural member such as a segment, a method of filling a joint with a resin material or a method of integrating synthetic resin anticorrosion coating materials by welding Etc. were adopted.
[0006]
[Problems to be solved by the invention]
However, according to the conventional corrosion prevention method for the joint portion of the anticorrosion-coated concrete structural member, the method of filling the joint portion with the resin material, that is, caulking, requires a considerable time for cleaning and drying the joint portion of the concrete structural member. In addition, there is a problem that a long curing period is required until the resin material is cured, and a lot of labor is required for the caulking work.
[0007]
Also, according to the method of welding the anti-corrosion coating materials, if there is moisture such as ground water at the construction site, the welding efficiency is reduced, and a lot of labor is required for the preparation and construction such as securing the necessary power supply. There was a problem of becoming.
[0008]
Therefore, the present invention has been made in view of such a conventional problem, and can easily apply a corrosion-proof coating to a joint portion of a concrete structural member subjected to a corrosion-proof coating without requiring much time and labor. An object of the present invention is to provide a joint structure for an anticorrosion-coated concrete structural member.
[0009]
[Means for Solving the Problems]
The present invention has been made in order to achieve such an object, and the gist of the present invention is a joint portion provided at a joint portion when a plurality of concrete structural members each having a corrosion-resistant coating layer on the surface are continuously integrated. An insertion having a cross-sectional shape which is formed along the joint portion by disposing a notch groove formed on each end face of an adjacent concrete structural member so as to widen from the neck portion through the shoulder portion. A groove, a neck inserted in the insertion groove, a widened portion connected to one of the necks, and a pair of wings connected to the other of the necks and bent and inclined from the neck to the widened portion side A band-shaped elastic anticorrosion insertion member having a cross-sectional shape consisting of: and inserting the widened portion of the band-shaped elastic anticorrosion insertion member into the insertion groove, thereby locking the widened portion to the shoulder of the insertion groove. The pair of wings Of the anticorrosion-coated concrete structural member, wherein the inner side surfaces of the pair of wing portions are brought into close contact with the surfaces of the anticorrosion coating layers on both sides of the joint portion by pulling the wide wall portion through the neck portion. It has a joint structure.
[0010]
The joint structure according to the present invention includes a sealing material such as silicone or an adhesive such as epoxy resin in the insertion groove when the widened portion of the band-like elastic anticorrosion insertion member is inserted into the insertion groove. It is preferable to keep it.
[0011]
Here, as the above-mentioned concrete structural members that are continuously integrated, for example, in addition to precast concrete such as a concrete segment, concrete that hardens in each section that is divided and cast in the cast-in-place concrete is also included. Is included.
[0012]
And according to the joint part structure of this invention, if the end surfaces of the adjacent concrete structural members are brought into contact with each other and connected and fixed, for example, by bolting or the like, the edge portions of the concrete structural members are formed in advance. An insertion groove having a cross-sectional shape in which the notch groove is disposed to face and widen from the neck portion through the shoulder portion is formed in a state where the neck portion is opened on the surface of the joint portion of the concrete structural member.
[0013]
And with respect to the insertion groove formed in this way, the band-shaped elastic anticorrosion insertion member is disposed with its widened portion facing the opening of the neck portion of the insertion groove, and for example, it is inserted into the insertion groove so as to be struck. If pushed in, the widened portion of the belt-like elastic anticorrosive insertion member shrinks and deforms due to its elasticity, passes through the neck of the insertion groove, is restored at a position deeper than the shoulder, and is locked and fixed to the shoulder of the insertion groove, By pulling the pair of wing parts to the widened part side through the neck parts, the inner side surfaces of the wing parts are firmly adhered to the surfaces of the anticorrosion coating layers on both sides of the joint part.
[0014]
That is, according to the joint structure of the anticorrosion-coated concrete structural member of the present invention, by simply pushing the band-shaped elastic anticorrosive insertion member into the insertion groove as the joint formed in the joint portion of the adjacent concrete structural member, The wing portion of the belt-like elastic anticorrosive insertion member is firmly adhered to the surface of the anticorrosion coating layer, and a joint structure having high water-stopping and anticorrosion properties is easily formed at the joint.
[0015]
In addition, when a band-like elastic anticorrosive insertion member is inserted into the insertion groove, if a sealing material or an adhesive is put in the insertion groove, more reliable anticorrosion properties and water-stopping properties can be secured in the joint structure. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The joint structure of the anticorrosion-coated concrete structural member of this embodiment is a joint portion of the concrete segment 10 as a concrete structural member constituting the covering body 51 of the shield tunnel 50 as shown in FIGS. 1 (a) and 1 (b). 12 is provided in the joint portion 13.
[0017]
Moreover, according to this embodiment, since the shield tunnel 50 is a sewer tunnel and is in contact with corrosive water, the inner peripheral surface of each segment 10 is previously provided with an anticorrosive anticorrosion coating at the time of production. While covering with the layer 23 (refer FIG. 2), when the several segment 10 is connected and integrated and forms the covering body 51, it also provides high anti-corrosion property and water stop property also to the junction part 12 between the adjacent segments 10. FIG. Therefore, the joint structure of the anticorrosion-coated concrete structural member of the present invention is employed.
[0018]
That is, the joint portion structure 11 of this embodiment is provided at the joint portion 13 of the joint portion 12 between the adjacent segments 10 as shown in FIGS. 2 and 3, and each end face of the adjacent segment 10. An insertion groove 17 having a cross-sectional shape widened from the neck portion 15 through the shoulder portion 16 formed along the joint portion 13 by disposing the notch groove 14 formed in the upper portion and the insertion portion 17 into the insertion groove 17. The neck portion 18, the widened portion 19 having a circular cross section connected to one of the neck portions 18, and the pair of wing portions 20 that are connected to the other of the neck portions 18 and bend and incline from the neck portion 18 toward the widened portion 19. The band-shaped elastic anticorrosion insertion member 22 having a cross-sectional shape is inserted into the insertion groove 17 so that the widening part 19 is inserted into the shoulder 1 of the insertion groove 17. And by pulling the pair of wing parts 20 to the widening part 19 side through the neck part 18, the inner side surface of each wing part 20 is placed on the surface of the anticorrosion coating layer 23 on both sides of the joint part 13. It is comprised by making it closely_contact | adhere.
[0019]
Here, the concrete segment 10 is made of precast concrete having a rectangular arc shape, which is manufactured by placing and hardening concrete in a manufacturing formwork in advance in a factory or the like, and is manufactured on the inner peripheral surface side of the segment 10. By placing concrete after laying and arranging a sheet member 21 made of, for example, a resin material on the surface of the mold, the anticorrosion coating layer 23 can be easily attached to the inner peripheral surface of each segment 10. .
[0020]
The sheet member 21 constituting the anticorrosion coating layer 23 is made of a resin material such as polyethylene or polypropylene, which has a high anticorrosion property. For example, the sheet member 21 has a large number of protrusions on the back surface thereof and is used as an anchor as a segment. By embedding in the concrete of the 10 inner peripheral surface, the anticorrosion coating layer 23 is firmly fixed and fixed to the inner peripheral surface.
[0021]
On the other hand, each end face of the segment 10 is provided with a notch groove 14 extending along the circumferential direction of each segment 10 at the inner edge of the inner face, and at an appropriate place inside the end of each segment 10. A bolt box used when fastening adjacent segments 10 is provided in the same manner as a general segment.
[0022]
Here, the notch groove 14 is formed by boxing or the like when the segment 10 is manufactured. The notch groove 14 is cut in parallel to the end face of the segment 10 and has a shallow notch depth portion 25 and the flat portion. 25, the notch groove 14 of each segment 10 is opposed to each other by connecting the end faces of the adjacent segments 10 to each other and fixing them by bolting or the like. Thus, the insertion groove 17 having a cross-sectional shape having a widened portion 27 that widens in a circular shape from the neck portion 15 through the shoulder portion 16 is formed in a state where the neck portion 15 is opened on the surface of the joint portion of the segment 10. become.
[0023]
In addition, the surface of the notch groove 14, that is, the inner surface of the insertion groove 17, is preliminarily coated with an anticorrosion coating 24 with a highly anticorrosive adhesive such as an epoxy resin.
[0024]
On the other hand, the anticorrosion insertion member 22 constituting the joint structure 11 of this embodiment is a strip-like member that is made of a resin material such as high-density polyethylene or polypropylene and has high anticorrosion properties and elasticity, and is a flat plate or panel. 3 is manufactured to have a cross-sectional shape as shown in FIG. 3 by subjecting the resin material to heat processing or welding processing.
[0025]
That is, the anticorrosion insertion member 22 has a cross-sectional shape including a neck portion 18, a widened portion 19 having a circular cross section connected to one of the neck portions 18, and a pair of wing portions 20 connected to the other of the neck portions 18. The widened portion 19 is hollow and has a gap at the center of the neck portion 18 so that it is easily elastically deformed. Further, the pair of wing portions 20 are connected to the neck portion 18 in a state where the pair of wing portions 20 are bent from the neck portion 18 toward the widened portion 19 side and inclined.
[0026]
Note that an adhesive sealant or water-expandable rubber is appropriately attached to the inner surface side of the wing part 20, that is, the part in contact with the anticorrosion coating layer 23, and the wing when the anticorrosion insertion member 22 is inserted into the insertion groove 17. A strong adhesion between the portion 20 and the anticorrosion coating layer 23 is ensured to prevent water and corrosive substances from entering the joint portion 13.
[0027]
Further, the neck portion 18 of the anticorrosion insertion member 22 is formed to be substantially the same as or slightly longer than the length of the neck portion 15 of the insertion groove 17, so that the widening portion 19 of the anticorrosion insertion member 22 is replaced with the widening portion 27 of the insertion groove 17. When pushed in, the inner side surface of the wing part 20 bent toward the widened portion 19 side is pulled toward the widened portion 19 side so as to come into contact with the anticorrosion coating layer 23 on the inner peripheral surface of the segment 10. It has become.
[0028]
And according to the joint part structure of this embodiment, it is comprised by inserting the widened part 19 of the strip | belt-shaped elastic corrosion-proof insertion member 22 in the insertion groove | channel 17.
[0029]
That is, with respect to the above-described insertion groove 17 formed by connecting and fixing the adjacent segments 10, the anticorrosion insertion member 22 is arranged so that the widened portion 19 is along the opening of the neck portion 15 of the insertion groove 17. If the anticorrosion insertion member 22 is swept toward the inside of the insertion groove 17, the widening portion 19 of the anticorrosion insertion member 22 is restored by being easily pushed into the insertion groove 17 due to its elasticity. The widened portion 19 is locked and fixed to the shoulder portion 16 of the insertion groove 17.
[0030]
On the other hand, since the pair of wing portions 20 of the anticorrosion insertion member 22 is bent and inclined toward the widening portion 19, the widening portion 19 is secured via the neck portion 18 by locking the widening portion 19 to the insertion groove 17. Accordingly, the inner surface of each wing portion 20 is firmly adhered to the surface of the anticorrosion coating layer 23 on both sides sandwiching the joint portion 13 by its elasticity, thereby covering the joint portion 13 and covering the joint portion 13 with an anticorrosion coating. It will be.
[0031]
Therefore, according to this embodiment, the water-proof and anti-corrosion properties can be obtained by simply striking and pushing the anti-corrosion insertion member 22 into the insertion groove 17 as the joint portion 13 formed in the joint portion 12 of the adjacent concrete segment 10. The joint part structure 11 rich in nature can be easily obtained.
[0032]
Further, when the anti-corrosion insertion member 22 is inserted into the insertion groove 17, if a sealing material such as silicone or an adhesive such as epoxy resin is previously inserted into the insertion groove 17, for example, the anti-corrosion is thereby prevented. By hardening the insertion member 22 and constraining the widened portion 19, it is possible to secure a more reliable anti-corrosion property and water-stopping property while firmly preventing the anti-corrosion insertion member 22 from coming out.
[0033]
In addition, this invention is not limited to the thing of the aspect of the said embodiment, A various change can be employ | adopted within the range of the structure described in each claim. For example, the joint structure of the present invention is not limited to the joint portion of the segment, but can be adopted for the joint portion of other precast concrete members, and can be used for in-situ concrete such as concrete walls and concrete slabs. It can also be used for joints.
[0034]
【The invention's effect】
As described above in detail, according to the joint structure of the anticorrosion-coated concrete structural member of the present invention, the cutout grooves formed in the respective end faces of the adjacent concrete structural members are arranged so as to face each other along the joint portion. An insertion groove having a cross-sectional shape that is widened from the neck portion through the shoulder portion, a neck portion that is inserted into the insertion groove, a widening portion that is connected to one of the neck portions, and the other of the neck portions. Since it is composed of a band-shaped elastic anticorrosion insertion member having a cross-sectional shape composed of a pair of wings which are bent and inclined from the neck portion to the widening portion side, the work is simply pushed into the insertion groove. Accordingly, the joint portion of the concrete structural member provided with the anticorrosion coating can be easily subjected to the anticorrosion coating without requiring much time and labor.
[Brief description of the drawings]
FIGS. 1A and 1B illustrate a shield tunnel segment covering body employing a joint structure according to an embodiment of the present invention, FIG. 1A is a front view, and FIG. It is the internal view which looked at a) from AA.
FIG. 2 is a cross-sectional view showing a joint structure according to an embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view illustrating a joint structure according to an embodiment of the present invention.
[Explanation of symbols]
10 segments (concrete structural members)
DESCRIPTION OF SYMBOLS 11 Joint part structure 12 Joint part 13 Joint part 14 Notch groove 15 Insert groove neck part 16 Insert groove shoulder part 17 Insert groove 18 Corrosion-proof insertion member neck part 19 Corrosion-proof insertion member widening part 20 Corrosion-proof insertion member wing part 22 Band shape Elastic anticorrosion insertion member 23 Anticorrosion coating layer 25 Flat portion 26 of notch groove Arc portion 27 of notch groove Widening portion 50 of insertion groove Shield tunnel

Claims (2)

When a plurality of concrete structural members with anticorrosion coating layers on the surface are continuously connected and integrated, a joint structure is provided on the joint portion of the concrete structural member, and is formed in each end face of the adjacent concrete structural member. An insertion groove formed along the joint portion and having a cross-sectional shape widened from the neck portion via the shoulder portion, a neck portion inserted into the insertion groove, and one of the neck portions. A band-shaped elastic anticorrosive insertion member having a cross-sectional shape composed of a widened part connected to each other and a pair of wing parts bent and inclined from the neck part toward the widened part side, connected to the other of the neck parts. By inserting the widened portion of the insertion member into the insertion groove, the widened portion is locked to the shoulder portion of the insertion groove, and the pair of wings are pulled to the widened portion side through the neck, Inside a pair of wings A joint portion structure of anticorrosion coated concrete structural member, characterized in that to adhere to the surface of the anticorrosive coating layer of both sides of the joint portion. 2. A sealing material such as silicone or an adhesive such as epoxy resin is placed in the insertion groove when the widened portion of the band-like elastic anticorrosion insertion member is inserted into the insertion groove. A joint structure of the anticorrosion-coated concrete structural member described in 1.

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