JP2008196229A - Joint connection structure and method of mounting the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible joint connection structure for precast concrete members which is easily mountable without being influenced by weather and steps between the members. <P>SOLUTION: A notch is formed at a corner of each of connection members 1, 1, and a female flexible joint member 3 is secured into the notch. A male flexible joint member 4 has projections formed on both sides thereof and a ridged projection formed at the center thereof. Then the ridged projection is inserted into a groove defined by both the female flexible joint members connected to each other, and both the projections are fitted into the connection grooves formed in the respective female flexible joint members. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flexible joint joint structure for a U-shaped or box-shaped precast concrete member used in a water channel and a method for constructing the same.

  A flexible joint material is used at the joint of the precast concrete member constituting the U-shaped water channel or the box-shaped water channel, and a flexible joint is used at the joint as a structure capable of following the relative displacement during an earthquake. The following document is an example, and many other proposals have been proposed.

JP 09-310399 A JP 2005-126985 A

  By the way, the elastic sealing of polyurethane used for conventional joints is affected by the weather and may be affected by the craftsman's arm, and there is a demand for a structure that can be easily constructed even when there are steps in the joints. It is desirable to develop a structure that can be easily implemented by anyone, regardless of the weather and steps.

  According to the present invention, a female flexible joint material having a notch formed in a corner portion of an opposing joining member and having a fitting groove in the notch is fixed, and the male flexible joint material has protrusions on both sides. The ridge-shaped projections are formed, the ridge-shaped projections are formed in the middle, and the ridge-shaped projections are inserted into grooves formed between the female-type flexible joint materials to be joined. The joint joint structure is formed by being inserted into the joint groove of the joint material, the joint member is a precast concrete member, and the flexible joint material is rubber. Furthermore, an adhesive having a lubricant function is filled in the fitting portion between the fitting groove of the female flexible joint material and the protrusion of the male flexible joint material.

  The notch portion of the joining member is formed on the inner surface of the joining end portion, and at the time of construction, a female flexible joint material is previously attached to the notch portion of the joining member with an adhesive or the like. After the joining member is deposited and joined in the excavation groove by the dredging method, the male flexible joint material straddling the joint joint is sandwiched between the joint joints inside the joining member. Installing.

  The present invention has the above-described configuration, and a female flexible joint material can be easily arranged by forming a notch in the corner of the opposing joining member. The male flexible joint material can be easily fitted and attached to the adhesive joint material. In particular, in the male flexible joint material, the mountain-shaped projections can be deformed at the joint spacing in the middle, and the male flexible joint material easily deforms in the mountain-shaped projection portion following the mutual displacement of the opposing members. it can.

  The present invention is suitable for use in joints of U-shaped or box-shaped precast concrete members composed of precast concrete members. Furthermore, by assembling the male and female joint material with an adhesive having a lubricant function, the assembling work is easy, and after assembling, it is fixed and there is no fear of detachment.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  The drawing shows the state implemented at the joint joint of the box culvert.

  As shown in FIGS. 1 to 5, notch portions 2 and 2 are formed at corners on the inner surfaces of the joining end portions of the opposing concrete joining members 1 and 1, and a female flexible joint material is formed in the notch portion 2. 3 is fixed. The male flexible joint materials 4 and 4 have protrusions 5 and 5 formed on both sides, and a mountain-shaped protrusion 6 formed in the middle.

  In the female type flexible joint material 3, for example, fitting grooves 7 with lips on the left and right of the entrance of the groove are formed. In addition, an inclined surface that is inclined toward the inside is formed on the end face facing the joint, and a groove portion W having a chevron gap is formed in the joint.

  The protrusion 5 portion of the male flexible joint material 4 has, for example, a shape having a locking portion that locks the lip on the left and right ends of the tip portion that protrudes integrally from the substrate portion, and a space is formed in the inside. It is easy to deform.

  The mountain-shaped protrusion 6 portion of the male flexible joint material 4 is a portion that integrally connects the substrate portions of the left and right protrusions 5, for example, a mountain-shaped gap between the pair of female flexible joint materials 3, 3. This is a chevron shape that is inserted into the groove portion W, and is easily deformed by forming a semicircular groove at the corner portion.

  When mounting, the mountain-shaped protrusions 6 are inserted and fitted into the groove portions W formed between the female flexible joint materials 3 and 3, and the protrusions 5 and 5 on both sides are inserted into the female flexible members. It is inserted into the fitting grooves 7 and 7 of the characteristic joint materials 3 and 3.

  The joining members 1 and 1 are precast concrete members, and the flexible joint materials 3 and 4 are rubbers. For example, elastic synthetic resin or rubber. An adhesive 8 having a lubricant function is filled in a fitting portion between the fitting groove 7 of the female flexible joint material 3 and the protrusion 5 of the male flexible joint material 4 (see FIG. 5). A moisture-curing urethane adhesive is used as the adhesive 8 having the lubricant function.

  In addition to the moisture curable urethane adhesive, silicone, modified silicone, epoxy, polyisobutylene, and polysulfide are used.

  An example of the case where the joint joint structure as described above is applied to a box culvert submerging method using a muddy water solidification method is shown in FIGS.

  As shown in FIG. 6, on the outer surface side of the box culvert 1, an upstream side guide fitting 10 and a downstream side guide fitting 11 made of an angle material are provided. The guide metal fitting 10 is attached to the outer surface of the box culvert 1 by a bolt 12 and the other side is arranged inward in parallel with the joint surface. The guide fitting 11 has one side embedded in the joint surface, the other side is disposed outward in parallel with the joint surface, and engages with the side of the guide fitting 10. The guide metal fitting 10 and the guide metal fitting 11 serve as a guide when set, and after the set, they are joined by engagement.

  As shown in FIG. 7, a female flexible joint material 3 is attached in advance to the cutout portion 2 on the inner surface of the box culvert 1 with an adhesive 13 in a factory or the like. In the front view of the box culvert, the shape of the four corner portion hunches of the notch portion 2 is made R so that the female flexible joint material 3 can be easily attached over the entire circumference.

  As shown in FIGS. 8 and 9, partition iron plates are provided at the upstream and downstream openings of the box culvert 1 in factories and the like to prevent the intrusion of the solidifying material and the stabilizing liquid therein. As shown in FIG. 8, first, a support frame 20 made of an angle material is attached to the opening. For example, an angle member is attached to the four inner peripheral sides of the opening inside the notch 2 with bolts 21, and a cross-shaped angle member is disposed at the center and attached to the four sides. Next, as shown in FIG. 9, the four partition iron plates 22 are attached to the angle members of the support frame 20 with bolts 23 to completely close the opening.

(1) As shown in FIG. 10, the box culvert 1 configured as described above is built into the excavation groove 30 by the guides of the guide fittings 10 and 11. In this embodiment, construction is performed with three box culverts 1 as one span, and a partition plate 31 for closing the cross section of the excavation groove 30 is provided on the joint surface of the box culvert 1 at the tip.

(2) As shown in FIG. 11, the three box culverts 1 are suspended and supported in a stabilizing liquid in the excavation groove 30, and a solidifying material such as cement milk is supplied into the stabilizing liquid with air or the like. The box culvert 1 is covered with a solidified slurry 32. After the stabilization liquid has solidified, the partition plate 31 is pulled out, the above steps are repeated in sequence, and the box is submerged.

(3) Inside the box culvert 1, the partition iron plate 22 and the support frame 20 are removed after the stabilizing liquid is solidified, and the inside of the fitting groove 7 of the female flexible joint material 3 as shown in FIG. And the surface is cleaned, adhesive 8 having a lubricant function is applied to the fitting grooves 7 and the protrusions 5, and the mountain-shaped protrusions 6 of the male flexible joint material 4 are inserted and fitted into the groove portions W. The female flexible joint material 4 is mounted on the pair of female flexible joint materials 3 and 3 by inserting the protrusions 5 and 5 into the fitting grooves 7 and 7, respectively.

  Needless to say, the joint joint structure of the present invention can be applied not only to the box culvert submerging method by the above-mentioned mud water solidification method but also to other laying methods of a box.

  This invention is a U-shaped or box-shaped precast concrete member that does not have a receiving structure and has a smooth end surface, that is, a flat end surface. For example, when a precast concrete member is used, It is effective for increasing the water-stopping property in the method of filling and precipitating the precast member therein to solidify the stabilizing liquid and aiming for the precast concrete member.

  In addition, it is effective in increasing the water-stopping property when the precast concrete member is subjected to a repeated load such as a traffic load because the earth covering is shallow.

It is sectional drawing of the principal part of the arrangement | positioning state of the female type | mold flexible joint material of this invention. It is a top view of the arrangement | positioning state of the said female type | mold flexible joint material. It is sectional drawing of the male type | mold flexible joint material of this invention. It is sectional drawing of the joining state of this invention. It is explanatory drawing of a joining state. An example of the box culvert to which this invention is applied is shown, (a) is a perspective view, (b) is a front view and a rear view, and (c) is a horizontal sectional view of a joining end portion. 6A and 6B are a front view and a rear view, FIG. 6B is an enlarged sectional view of a joining end portion, and FIG. 6C is a horizontal sectional view of the joining end portion. FIG. 7 is a state in which a support frame is provided on the box culvert of FIG. 8 is a state in which a partition iron plate is provided on the box culvert of FIG. 8, (a) is a perspective view, (b) is a front view and a rear view, and (c) is a horizontal sectional view of a joining end portion. It is an example at the time of applying this invention to the box culvert embedding method by a muddy water solidification method, (a) is a whole vertical sectional view, (b) is a partial perspective view of erection, (c) is a horizontal section of a junction FIG. 4D is a partially enlarged horizontal sectional view thereof. FIG. 10 shows the next step of FIG. 10, where (a) is an overall vertical sectional view, (b) is a horizontal sectional view of the tip portion, and (c) is a partially enlarged horizontal sectional view thereof. FIG. 12 is a horizontal sectional view showing an internal joint bonding process in the next step of FIG. 11 in the order of steps.

Explanation of symbols

1 ... Concrete joint member (box culvert, etc.)
DESCRIPTION OF SYMBOLS 2 ... Notch part 3 ... Female type flexible joint material 4 ... Male type flexible joint material 5 ... Protrusion 6 ... Mountain-shaped protrusion 7 ... Fitting groove 8 ... Adhesive which has a lubricant function 10 ... Guide metal fitting 11 ... Guide Metal fitting 12 ... Bolt 13 ... Adhesive 20 ... Support frame 21 ... Bolt 22 ... Bulkhead iron plate 23 ... Bolt 30 ... Excavation groove 31 ... Partition plate W ... Groove

Claims (4)

  A notch is formed in a corner portion of the opposing joining member, a female flexible joint material having a fitting groove is fixed to the notch, and the male flexible joint material has protrusions formed on both sides, A mountain-shaped projection is formed in the middle, and the mountain-shaped projection is inserted into a groove formed between the female flexible joint materials to be joined, and the projections on both sides are inserted into the female flexible joint material. A joint joint structure characterized by being inserted into the fitting groove.   The joint joint structure according to claim 1, wherein the joint member is a precast concrete member, and the flexible joint material is rubber.   The joint joint structure according to claim 1, wherein an adhesive having a lubricant function is filled in a fitting portion between the fitting groove of the female flexible joint material and the protrusion of the male flexible joint material. A female flexible joint material having a fitting groove is attached to the notch formed in the corner portion of the opposing joining member, and after joining the opposing joining member, protrusions are formed on both sides, The mountain-shaped projections of the male flexible joint material having the mountain-shaped projections are inserted into grooves formed between the female flexible joint materials, and the projections on both sides are inserted into the female-type flexible joint material. A method for constructing a joint joint structure, wherein the joint joint structure is inserted into a fitting groove of a joint joint material.

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