JP2008050878A - Disassemblable connection portion between floor slab and beam, and method of constructing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disassemblable connection portion between a floor slab and a beam, which can be disassembled after completion thereof in the construction field, takes countermeasures against water leakage and sound leakage in a floor slab service condition, and eliminates the risk of detachment of a filler from the connection portion in the floor slab service condition, to thereby contribute to improved disassembling efficiency. <P>SOLUTION: The connection portion is formed of a beam member 1 having a flange 1a and the floor slabs 2 supported by the beam member 1. Each floor slab 2 has a notch 2a formed in an end face close to the beam member 1 except for a joint portion 2b being left on a lower side of the end face, in a manner extending in a thickness direction from an upper surface of the floor slab such that a width of the notch extends from the upper surface to a lower surface. Then the floor slabs 2 thus formed are mounted on the beam member 1 so as to be opposed to each other, and connected to the beam member 1 by bolts 3 each penetrating the flange 1a and the joint portion 2b. Further a waterproof separating material 5 is bonded to a surface of a void defined by the notch 2a, and a filler 6 is filled onto the waterproof separating material 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dismantleable floor slab / beam joint and a construction method thereof capable of dismantling after construction in a building / civil engineering structure.

  In recent years, as a part of measures for reducing the environmental burden and reducing carbon dioxide, the construction industry has been desired to actively promote reuse methods. From this point of view, it is required that the joint between the floor slab and the beam using the steel beam member and the concrete floor slab can be disassembled or disassembled and reconstructed after completion (patent document) 1 and 2).

  As a means to meet this requirement, a method of detachably joining the floor slab and the beam member using a high-strength bolt can be considered. However, in the completed state of the joint, it is essential to take measures against water leakage and sound leakage between the end faces of the opposite slabs on the beam member. If the floor slab and beam member are used repeatedly, they will be damaged during dismantling. It is necessary to separate them without causing them. 6 (a) and 6 (b) show examples of conventional joints.

  6 (a) shows a bolt insertion hole formed on the end of the floor slab from the upper surface side, and a recess in which the head of the bolt fits is formed on the upper surface side, and the end surfaces of the adjacent floor slabs are closely attached to each other on the beam member. In this state, the floor slab is joined to the beam member by a bolt that penetrates the bolt insertion hole and the flange of the beam member. In (b), a notch is formed at the end of the floor slab from the upper surface side, the notch is opposed to each other, and the adjacent floor slab is placed on the beam member, and the floor slab is turned to the beam member by a bolt. It is a case where it joins and a notch part is filled with fillers, such as mortar.

  In the case of FIG. 6- (a), since the filling portion of the filler is limited to the concave portion of the floor slab, there is an advantage that the floor slab can be separated from the beam member only by removing the bolt at the time of disassembly. On the other hand, since the end faces of the floor slab are merely in close contact with each other, separate measures against water leakage and sound leakage are required in the state of use of the floor slab. The need for measures against water leakage and sound leakage also applies to Patent Documents 1 and 2, which secure a gap between the end faces of adjacent floor slabs on the beam member.

  In FIG. 6- (b), since the filler is filled across the end faces of the adjacent floor slabs, no countermeasures against water leakage and sound leakage are necessary, but the side surface (surface) of the notch is a vertical surface. Therefore, it is necessary to ensure the integrity of the filler filled in the notch and the floor slab body. Specifically, as shown in the figure, it is necessary to project the incisor from the floor slab body to the notch or to roughen the surface of the notch. As a result of adhering the filler to the floor slab body, the floor slabs cannot be separated from each other when the floor slabs are dismantled, and it is necessary to destroy part of the floor slabs. And only the beam member can be collected.

  In response to the problem of floor slab destruction due to adhesion of filler during dismantling, the notch formed on the floor slab is shaped like an inverted truncated cone to facilitate removal of the filler in the notch during dismantling. There is a method to do (see Patent Document 3).

JP 2004-218287 A (Claim 1, paragraphs 0005, 0013 to 0019, FIG. 3) Japanese Patent Laying-Open No. 2005-061081 (Claim 1, paragraphs 0004, 0017 to 0024, FIG. 3) JP 2006-097358 A (Claim 1, paragraphs 0027 to 0033, FIG. 1)

  In Patent Document 3, a bolt that joins a floor slab to a beam member passes through, and a through hole filled with a filler is formed into an inverted frustoconical shape. (Paragraph 0028).

  However, since there is no reinforcing bar or the like for taking adhesion with the filler in the through hole, no adhesive force can be expected between the mortar and the inner peripheral surface of the through hole (paragraph 0033). In use, the cured mortar may escape from the through hole. Therefore, in actual use, as shown in FIG. 6, it is considered indispensable to take measures to obtain adhesion between the floor slab and the filler, or to prevent slipping out. Moreover, since the space | gap is formed between the end surfaces of an adjacent floor slab, the countermeasure with respect to the water leak and sound leakage in this space | gap is needed separately.

  From the above background, the present invention provides a floor slab / beam joint with good workability at the time of disassembly without taking off the filler in the state of use of the floor slab while taking measures against water leakage and sound leakage in the state of use of the floor slab. And its construction method.

  The dismantleable floor slab / beam joint according to claim 1 includes a beam member having a flange and a floor slab supported by the beam member, on an end portion on the beam member side of the floor slab, on a lower surface side. A notch portion having a shape in which the width expands from the upper surface side to the lower surface is formed in the thickness direction from the upper surface side leaving the connecting portion, and the floor slab is placed on the beam member so as to face each other, A bolt that penetrates the flange and the connecting portion is joined to the beam member, and a waterproof / separating material is adhered to the surface of the gap formed by the notch, and the waterproof / separating material is filled with a filler. Is a constituent requirement.

  The adjacent floor slab on the beam member is mounted on the beam member and is joined to the beam member by a bolt that penetrates the connecting portion and the flange of the beam member to form a notch in the adjacent floor slab. When the gap is filled with a filler such as concrete or mortar, it is joined to the beam member. A waterproof material (agent) for preventing the water existing on the floor slab from entering the back of the floor slab is attached to the surface of the connecting portion and the surface of the notch which are the surfaces of the gap. Measures against water leakage and sound leakage are taken in the use state of the floor slab (joint part) due to adhesion of a waterproof material (agent) to the gap. A separating material (agent) for facilitating separation of the filler when disassembling the joint portion from the floor slab and the beam member is also attached to the surface of the connecting portion and the surface of the notch portion.

  By leaving a connecting part on the lower surface side at the end of the beam member side of the floor slab, and forming a notch with a shape that increases in width from the upper surface to the lower surface, the end of the floor slab is placed on the beam member. When facing each other, a gap having a trapezoidal shape or a cross-sectional shape similar to that is formed. The filler filled in the gap is also cured in a cross-sectional shape such as a trapezoidal shape.

  Since the cross-sectional shape of the filler is trapezoidal or the like, the hardened filler is engaged with both floor slabs upward. Cannot escape upward from the joint. Since the hardened filler is restrained against slipping out, it is not necessary to perform processing for preventing the filler from slipping out, and it is not necessary to fix the filler to the floor slab.

  Since it is not necessary to fix the filler to the floor slab, there is no risk of damaging the floor slab when the filler is separated from the floor slab when the joint is disassembled, and the floor slab can be reused. It becomes possible to collect. In particular, since the separating material (agent) is attached to the surface of the connecting part and the surface of the notch part, it can be recovered in a cured form without destroying the cured filler itself. The floor slab can also be recovered in its original form.

  The adjacent floor slabs on the beam member are abutted with each other or placed with a gap between the end faces. In the former case, the gap is formed only from the notch, and in the latter case, the gap continues to the upper surface of the upper flange of the beam member and becomes a T-shape. When the adjacent floor slabs are brought into contact with each other, the waterproof material (agent) and the separating material (agent) are attached to the upper surface of the connecting portion and the inner peripheral surface of the notch portion continuous therewith. In the case where a space is provided between the end faces, the gap is attached to the side surface of the connecting portion and the upper surface of the flange in addition to the upper surface of the connecting portion and the inner peripheral surface of the notch portion.

  When a space is provided between the end faces of the floor slabs, a separating material (agent) is also attached to the end faces of the connecting portions, so that it is easy to separate the adjacent floor slabs when disassembling the joints regardless of the materials. There are advantages. Even if the floor slabs are abutted, if the separating material (agent) is a material that maintains a liquid state during construction, it can penetrate into the gaps between the end faces of the floor slabs, making separation between the floor slabs particularly difficult. There is nothing.

  When the floor slab / beam joint is disassembled, the bolt that penetrates the flange of the floor slab and the beam member is pulled down or struck upward to remove the bolt from the flange and the floor slab, and then hardened. The filling material is collected and the adjacent floor slabs are collected one by one. Since the work at the time of dismantling is performed only by removing the bolt from the floor slab and flange and collecting the filler, the floor slab is not destroyed, so both floor slabs and beam members are recovered in a reusable state. The

  Specifically, the bolt that joins the connecting portion of the floor slab to the flange penetrates the flange of the beam member from the lower surface side as described in claim 2, or the connecting portion of the floor slab as described in claim 4. Through the top surface. In the case of claim 2, the nut is screwed to the shaft portion of the bolt projecting from the upper surface of the connecting portion of the floor slab, and in the case of claim 4, the head of the bolt is accommodated in the connecting portion of the floor slab. In the case of claim 4, the tip of the bolt protrudes from the lower surface of the flange, and the nut is screwed into the protruding shaft portion.

  In the case of claim 2 in which the bolt penetrates the flange from the lower surface side, the bolt can be removed from the lower surface side of the flange when the joint is disassembled. In addition, it is possible to separate the floor slab and the hardened filler only by removing the bolts and collect both. According to the second aspect, since the filler is recovered in a cured form, there is an advantage that it can be easily disposed of.

  In this case, the joint is disassembled by extracting a bolt from the lower surface side of the flange and separating the floor slab from the beam member. After the bolt is extracted, the hardened filler is disengaged by moving one of the adjacent floor slabs away from the other floor slab. Then, the other floor slab is collected. One floor slab is recovered by movement.

  In the case of claim 4 in which the bolt penetrates the connecting portion from the upper surface side, the bolt cannot be removed from the lower surface side of the flange, but the nut screwed to the tip of the bolt is removed and the tip of the bolt is viewed from below. By applying a striking force, it is possible to collect both floor slabs by destroying the filler.

  In claim 2, the filler is recovered in a cured state, and in claim 4 it is destroyed, but it does not damage both slabs during recovery of the slabs. In some cases, the floor slab can be recovered intact.

  In claim 2, since the nut screwed into the bolt is embedded in the filler, the nut cannot be reused. However, in claim 4, the nut and the bolt can be recovered together and reused. There are advantages you can do. According to the fourth aspect of the present invention, since the bottom part of the floor slab and the top part of the floor slab can be arranged in the connecting part by giving the connecting part a thickness that allows the head of the bolt to be accommodated, it corresponds to the top part of the filler. There is also an advantage that it is not necessary to arrange reinforcing bars. When it is not necessary to arrange reinforcing bars in the filler, the filler does not adhere to the reinforcing bars, so that it is easy to destroy the filler by hitting the bolt and to recover the bolt.

  In the case of claim 2 where the bolt penetrates the flange from the lower surface side, the nut is embedded in the filler, so that the nut is attached to the filler, so that if the adhesive force with the filler is sufficient, The nut does not rotate with the bolt when the bolt is removed. When there is a possibility that the nut rotates with the rotation of the bolt due to the compressive strength of the hardened filler, the rotation stopper embedded in the filler as described in claim 3 is provided. Can be fitted.

  For example, if the nut is housed in a recess formed in the connecting part and a metal plate or the like is disposed on the inner peripheral surface of the recess, the rotation of the nut is restricted when the bolt rotates, and the floor slab is damaged. Therefore, it is not necessary to fit a rotation stopper to the nut. Therefore, it is effective to fit a rotation stopper to the nut when it is impossible to form a recess in which the nut can be accommodated in the connecting portion because of the relation between the axial force of the bolt and the thickness of the connecting portion that can resist it. .

  The rotation stopper according to claim 3 is fitted around the nut to increase the adhesion force or fixing force with the filler, and when the nut is about to rotate, the torsional moment acting on the bolt in the filler It works to resist. The anti-rotation resists the rotation of the bolt, thereby preventing the nut from rotating together and ensuring that the bolt is detached from the nut.

  The floor slab / beam joint portion according to claim 1 is a top surface in the thickness direction from the top surface side, leaving a connecting portion on the bottom surface side at the end on the beam member side having the flange, as in claim 5. A floor slab formed with a notch portion whose width increases from the bottom surface to the lower surface is placed on the beam member so as to face each other, and the floor slab is fixed to the floor plate with a bolt penetrating the flange and the connecting portion. It completes through the process of joining to a beam member, the process of attaching a waterproofing / separation material to the surface of the space | gap which the said notch forms, and the process of filling a filler on this waterproofing / separation material. Opposing floor slabs may be butted against each other or spaced apart.

  The floor slab / beam joint portion according to claim 2 is a step of joining the floor slab according to claim 5 to the beam member as described in claim 6, wherein the bolt is made to penetrate the flange of the beam member from the lower surface side, and It is completed by screwing a nut into a shaft protruding from the upper surface of the connecting portion of the plate. In the step of joining the floor slab of claim 5 to the beam member as described in claim 7, the floor slab / beam joint of claim 4 penetrates the connecting portion of the floor slab from the upper surface side, Complete by placing the head in the connecting part of the floor slab.

  A floor slab with a notch formed at the end on the beam member side is joined to the flange of the beam member with bolts facing each other on the beam member, and a waterproof / separating material is adhered to the surface of the gap.・ Because the filler is filled on the separating material, while taking measures against water leakage and sound leakage in the state of use of the floor slab, by removing the bolt from the flange and floor slab when disassembling the floor slab / beam joint, The floor slab can be collected.

  In particular, the notched part is formed in a shape that increases in width from the upper surface to the lower surface, so that the hardened filler is restrained by the floor slabs on both sides and will not come out, so that it will not come out There is no need to adhere or fix to the floor slab. As a result, since the filler can be separated from the floor slab at the time of disassembling the joint, the floor slab and the beam member can be recovered in a reusable state without damaging the floor slab.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1- (a) and (b) are composed of a beam member 1 having a flange 1a and a floor slab 2 supported by the beam member 1, and a notch 2a and a connecting portion 2b are formed at the end of the beam member 1 side. The floor slab 2 is placed on the beam member 1 so as to oppose each other, and the floor slab 2 is joined to the beam member 1 with a bolt 3 penetrating the flange 1a and the connecting portion 2b to form a notch 2a. A concrete example of a dismantleable floor slab / beam joint in which a waterproof / separating material 5 is attached to the surface of the waterproof / separating material 5 and a filler 6 is filled on the waterproof / separating material 5 is shown.

  Although H-shaped steel is mainly used for the beam member 1, since the beam member 1 may be a steel material having a flange 1a at the top and bottom, it may have a shape in which H-shaped steels are arranged in parallel or a closed cross section. The floor slab 2 is mainly made of precast concrete, but the entire cross-section is not necessarily precast concrete. In addition to the case where a part is placed on-site, steel plates such as deck plates may be integrated. is there.

  The end of the slab 2 on the beam member 1 side (width direction) has a width from the upper surface side to the thickness direction, and from the upper surface to the lower surface, leaving the connecting portion 2b on the lower surface side as shown in FIG. A notch 2a is formed in a shape that expands. The connection part 2b and the notch part 2a are formed by, for example, arranging a trapezoidal mold at the end in the width direction when the floor slab 2 is manufactured.

  When the filler 6 filled in the gap formed by the notch 2a is hardened, the notch 2a is engaged with or locked to the side surface of the floor slab 2 main body 20 except for the notch 2a. The shape is not limited as long as it acts to restrain the movement to the position. As shown in FIGS. 1 to 4, when the nut 4 that is screwed to the tip of the shaft portion of the bolt 3 is arranged in the notch 2 a or when the head of the bolt 3 is arranged, the notch 2 a Has a height and a width that can accommodate at least the heads of the nut 4 and the bolt 3. As shown in FIG. 5, when the head of the bolt 3 is accommodated in the connecting portion 2b and does not protrude into the notch 2a, it is not always necessary to have a size that allows the nut 4 or the like to be accommodated.

  The connecting portion 2b is a portion for joining the floor slab 2 to the flange 1a of the beam member 1 with the bolt 3, and has a thickness capable of resisting the reaction force of the axial force applied to the bolt 3 when the nut 4 is fastened to the bolt 3. Have The bolts 3 are arranged at an appropriate interval in the length direction of the floor slab 2 as shown in FIG. 1- (b). Correspondingly, the bolts 3 are arranged at positions where the bolts 3 are arranged in the connecting portion 2b. An insertion hole 2c through which is inserted is formed. As shown in FIG. 5, when the head portion of the bolt 3 or the nut 4 is accommodated in the connecting portion 2b, a recess 2d is formed from the upper surface of the connecting portion 2b.

  As shown in FIG. 1- (a), the adjacent floor slabs 2 and 2 on the beam member 1 are beam members in a state where they are spaced from each other or faced to each other. The waterproof / separating material 5 is placed on the surface of the gap formed by the cutout portion 2a, that is, the side surface and the upper surface of the connecting portion 2b, and the side surface of the floor slab 2 main body 20 facing the cutout portion 2a. Attached.

  As shown in FIGS. 1, 3, and 4, when a space is provided between the end surfaces of the connecting portions 2 b and 2 b, the waterproof / separating material 5 is continuously attached to the upper surface of the flange 1 a. In this case, since the waterproof / separation material 5 enters between the end surfaces of the connecting portions 2b and 2b, adhesion between the adjacent floor slabs 2 and 2 is prevented. The floor slabs 2 and 2 can be easily separated from each other regardless of the material.

  The waterproof / separating material 5 functions as a waterproof material (agent) that prevents water existing on the floor slab 2 from entering the filler 6 when it enters the filler 6, and hardens when the joint is disassembled. It also has the function of a concrete separating material (agent) that separates the filler 6 from the floor slab 2. Specifically, the waterproofing / separation material 5 is made of, for example, vinyl, plastic, thin steel plate, etc., or an elastic body, a viscoelastic body, a viscous body or the like, which is a rubber or a gel-like substance, alone or in combination. . In the case of plastic or the like, a hole through which the bolt 3 is inserted is formed. The waterproof / separation material 5 is attached to the surface of the gap by application, adhesion, filling or the like.

  After adhering the waterproof / separating material 5 to the gap surface, the bolt 3 passes through the insertion hole 1b formed in the upper flange 1a and the insertion hole 2c of the connecting portion 2b, and the upper surface of the connecting portion 2b or the lower surface of the flange 1a. The nut 4 is screwed into the shaft portion of the bolt 3 protruding from the bolt and fastened. Thereafter, a reinforcing material 7 such as a reinforcing bar or a fiber reinforcing material for reinforcing the filler 6 is disposed, and the gap 6 formed by the notch 2a is filled with the filler 6 such as concrete, mortar, or adhesive. The joint is completed. The reinforcing material 7 serves as the upper end of the floor slab 2 in the filler 6. Since the notch 2a is formed from the upper surface of the floor slab 2, the reinforcing material 7 as a tensile resistance material is disposed above the notch 2a.

  As long as the filler 6 filled in the notches 2a and 2a of the two adjacent floor slabs 2 and 2 is cured in a trapezoidal cross section and the floor slab 2 is joined to the flange 1a, the floor slab 2 2 is engaged, so that it does not come out between the floor slabs 2 and 2. For this reason, the reinforcing material 7 corresponds to the upper end line of the floor slab 2, but does not protrude from the main body 20 of the floor slab 2, and may be disposed independently only in the gap.

  In FIG. 1, as shown in FIG. 3, the bolt 3 penetrates from the lower surface side of the flange 1 a and protrudes from the upper surface of the connecting portion 2 b so that the bolt 3 can be detached from the lower side of the flange 1 a when the joint portion is disassembled. A nut 4 is screwed into the part. In addition, since the nut 4 is disposed in the notch 2a so that the connecting portion 2b is thick enough to resist the axial force of the bolt 3, the nut 4 rotates together with the rotation of the bolt 3 when the joint is disassembled. In order to avoid such a situation, a rotation stopper 8 embedded in the filler 6 is fitted to the nut 4.

  The main body 8a of the rotation stopper 8 is fitted around the nut 4 as shown in FIGS. 2 (a) and 2 (b), and has a shape that can contact the surface thereof. The unevenness is formed so that the adhesion force of the is larger than the adhesion force generated in the nut 4. In the drawing, in order to increase the contact area with the filler 6 or to obtain a fixing effect in the filler 6, blade-like fixing portions 8 b are projected evenly in the circumferential direction of the main body 8 a as unevenness. In FIG. 2, 4a represents a washer.

  FIG. 3 shows a state when the joint shown in FIG. 1 is disassembled. The disassembly is performed by rotating the head of the bolt 3 protruding from the lower surface of the flange 1a of the beam member 1 and withdrawing the bolt 3 from the filler 6 while leaving the nut 4 in the filler 6. When the rotation stopper 8 is fitted to the nut 4 as shown in FIG. 1, the rotation of the bolt 3 is reliably performed because the nut 4 is prevented from rotating together with the rotation of the bolt 3. .

  After the bolt 3 is pulled out, either one of the adjacent floor slabs 2 and 2 is moved horizontally in the width direction, and the space between the notches 2a and 2a is increased to increase the hardening of the filler 6 that has been cured. Since the restraint from the floor slab 2 is released, the filler 6 is recovered, and the both floor slabs 2 and 2 are also recovered. When a space is provided between the end faces of the connecting portions 2b and 2b, the hardened filler 6 has the trapezoidal shape described above from the space between the notches 2a of the floor slab 2 and the space between the connecting portions 2b and 2b. It has a T-shaped cross section including a cross section.

  In FIG. 4, in order to compensate for a cross-sectional defect associated with the insertion of the insertion hole 1b formed in the flange 1a of the beam member 1, the plate 1c having the insertion holes 1b on both sides in the width direction of the flange 1a is welded. The case where the drilling of the insertion hole 1a to is avoided is shown. In this case, the width of the notch 2a, that is, the width of the hardened filler 6 is increased because the position of the bolt 3 is closer to both sides in the width direction of the flange 1a. No difference from the case of 1. The cross-sectional defect accompanying the drilling of the insertion hole 1b is also compensated by increasing the thickness of the flange 1a.

  5 (a) and 5 (b), the bolt 3 is passed through the connecting portion 2b and the flange 1a of the beam member 1 from the upper surface side of the connecting portion 2b of the floor slab 2, and the head is connected to the connecting portion 2b of the floor slab 2. The case where it is supposed to be contained within is shown. In this case, the bolt 3 is inserted from the upper surface side of the connecting portion 2b, passes through the connecting portion 2b and the flange 1a, and the nut 4 is screwed to the shaft portion protruding downward from the flange 1a. In FIG. 5, in order to prevent a thin portion from being formed in the filler 6 and to ensure the thickness of the filler 6 to a certain level or more, a recess 2d continuous to the insertion hole 2c is provided near the notch 2a of the connecting portion 2b. The head of the bolt 3 is housed in the recess 2d, but the head may be located in the notch 2a.

  In the case of FIG. 5, the connecting portion 2 b of the floor slab 2 can be provided with a thickness sufficient to embed an upper end line corresponding to the reinforcing member 7 in FIGS. 1 and 3. It is not always necessary to arrange the reinforcing material 7 on the surface.

  In the case of FIG. 5, when the joint portion is disassembled, the nut 4 below the flange 1a is removed, and the hardened filler 6 is destroyed by applying an impact force from below to the shaft portion of the bolt 3 protruding from the flange 1a. Then, the bolt 3 is removed from above the connecting portion 2b. Thereafter, both floor slabs 2 and 2 are collected. Although the filler 6 is destroyed, it does not damage the floor slab 2, so the floor slab 2 is recovered in a reusable state. When the reinforcing material 7 is not disposed in the filler 6, the strength against the destruction of the filler 6 is suppressed, and therefore the destruction of the filler 6 by hitting the bolt 3 is easily performed.

(A) is the longitudinal cross-sectional view which showed the junction part in case a volt | bolt penetrates a floor slab from the lower surface side of a flange, (b) is a top view of (a). (A) is the elevation which showed a mode that the rotation stopper was arrange | positioned around the nut, (b) is a top view of (a). It is the longitudinal cross-sectional view which showed the disassembly point at the time of disassembly of the junction part shown in FIG. It is the longitudinal cross-sectional view which showed the junction part at the time of welding the plate which has a through-hole which a volt | bolt penetrates to the flange of a beam member. (A) is the longitudinal cross-sectional view which showed the junction part in case a volt | bolt penetrates a floor slab from the upper surface side of a floor slab, (b) is a top view of (a). (A), (b) is the longitudinal cross-sectional view which showed the example of the conventional junction part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Beam member 1a ...... Flange 1b ... Insertion hole 1c ... Plate 2 ......... Floor slab 20 ... Main body 2a ... Notch part 2b ... Connection part 2c ... Insertion hole 2d ... Recess 3 ......... Bolt 4 ......... Nut 4a ... Washer 5 ......... Waterproofing / separating material 6 ......... Filling material 7 ...... Reinforcing material 8 ......... Rotation stop 8a ... Main body 8b ... Fixing section

Claims (7)

  It consists of a beam member having a flange and a floor slab supported by the beam member, and at the end of the floor slab on the beam member side, leaving a connecting portion on the lower surface side in the thickness direction from the upper surface side, from the upper surface to the lower surface A notch portion having a shape that increases in width is formed, the floor slab is placed on the beam member so as to face each other, and is joined to the beam member by a bolt that penetrates the flange and the connecting portion. A dismantleable floor slab / beam joint characterized in that a waterproof / separating material is attached to the surface of the gap formed by the notch, and the waterproof / separating material is filled with a filler.   The dismountable type according to claim 1, wherein the bolt penetrates the flange of the beam member from the lower surface side, and a nut is screwed to a shaft portion protruding from the upper surface of the connecting portion of the floor slab. Floor slab / beam joint.   The dismantleable floor slab / beam joint according to claim 2, wherein a rotation stopper embedded in the filler is fitted to the nut.   2. The dismantleable floor slab / beam joint according to claim 1, wherein the bolt penetrates the connecting portion of the floor slab from the upper surface side, and the head is accommodated in the connecting portion of the floor slab.   Floor slabs formed with notches having a shape in which the width increases from the upper surface to the lower surface in the thickness direction from the upper surface side leaving the connecting portion on the lower surface side at the end on the beam member side having the flange It is placed on the beam member so as to face each other, and the floor plate is joined to the beam member with a bolt penetrating the flange and the connecting portion, and the surface of the gap formed by the notch is waterproofed and separated. A dismantling type floor slab / beam joint construction method comprising a step of attaching a material and a step of filling a filler onto the waterproof / separating material.   6. The dismantleable floor slab according to claim 5, wherein the bolt penetrates the flange of the beam member from the lower surface side, and a nut is screwed to a shaft portion protruding from the upper surface of the connecting portion of the floor slab.・ Construction method for beam joints. 6. The method for constructing a dismantleable floor slab / beam joint according to claim 5, wherein the bolt penetrates the connecting portion of the floor slab from the upper surface side, and the head is stored in the connecting portion of the floor slab. .

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