JP2010070992A - Tool for closing hollow part of extruded section and method of installing floor slab for bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hollow part closing tool capable of reliably closing, from the outside, a part of the hollow part of an extruded section which constitutes a floor slab for a bridge and a method of installing the floor slab using the tool. <P>SOLUTION: This tool for closing the hollow part of an extruded section includes a pair of edge-dams 2a, 2b having an outline symmetrical to the cross section of the hollow part S of the extruded section E1, a plurality of connection bolts (connection bars) 4 for connecting the edge-dams at an interval, and a pair of pressing members 6a, 6b which are disposed so as to approach and depart from the side surfaces of the edge-dams and have the generally same outline as the outline of the edge-dams. Tapered surfaces 3 formed along the outer peripheral edges of the edge-dams are opposed to tapered surfaces 7 formed along the outer peripheral edges of the pressing members, respectively. A chord-like packing p is disposed between the tapered surfaces 3, 7 so as to be fitted to the inside wall of the hollow part S of the extruded section E1. A fixed bolt b for the pressing plate adjacent to the edge-dam extends through the edge-dam. The pressing plate is allowed to approach the edge-dam when a nut n screwed to the male screw part of the bolt b is forwardly rotated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hollow portion sealing jig for sealing a part of a hollow portion of an extruded profile from the outside, and a bridge floor slab installation method using the same. The bridge floor slab installation method of the present invention is not limited to road bridges, but is also applied to pedestrian bridges, railway bridges, and artificial ground.

In recent years, in order to reduce the weight of bridges and streamline construction, the use of aluminum slabs made by joining multiple extruded aluminum alloy members instead of steel slabs and reinforced concrete slabs has been studied. ing.
For example, on a plurality of main girders that are parallel to each other and made of I-shaped steel, a plurality of stud gibels that are erected in advance at appropriate intervals on the upper surface of each main girder, Inserted into the hollow part from the bottom of each extruded profile in each of the plurality of floor slab units with friction stir welding (FSW) between the edges in the extrusion direction, sealed a part of the hollow part and filled with mortar, and A method for installing a floor slab is proposed in which a part of the mortar is formed with a predetermined thickness between a floor slab unit and the main girder so that a plurality of floor slabs are continuously fixed on the main girder. (For example, refer to Patent Document 1).
Japanese Patent No. 4030825 (pages 1 to 13, FIGS. 1 to 7)

  By the way, in the installation method of the floor slab of the said patent document 1, in order to seal a part of hollow part of the said some extrusion shape member which comprises a floor slab unit, the through-hole opened to the bottom wall for every extrusion shape member is carried out. A jig composed of a unit in which a pair of dam plates having a shape similar to the cross-sectional shape of the hollow portion is arranged in the hollow portion near the upper part and is substantially similar to the cross-sectional shape of the hollow portion, and the dam plates are connected with bolts is used. ing.

  However, when the jig of the above unit is inserted in the hollow portion of each extruded shape member and immediately above the through hole, a gap is formed between the outer peripheral edge of the pair of barrier plates and the inner wall of the hollow portion, so that the filling is performed later. A part of the mortar that has been cured and cured may leak into the outer hollow portion from the sealed space sandwiched between the pair of barrier plates. As a result, the moisture in the atmosphere penetrates into the mortar located in the sealed space sandwiched between the pair of dam plates through the leaked mortar, and the mortar deteriorates, thereby supporting the slab for the main girder. There is a problem that the strength may decrease, and maintenance work is necessary for thriving.

  The present invention solves the problems described in the background art, and a hollow portion sealing jig capable of reliably sealing a part of a hollow portion of an extruded profile constituting a floor slab from the outside, and a bridge floor using the same. The problem is to provide a plate installation method.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-mentioned problem, the present invention moves the packing disposed along the outer peripheral edge of each pair of barrier plates to the inner wall side of the hollow portion, or the water-expanding rubber along the outer peripheral edge of each barrier plate. It was made with the idea of arranging a water-stopping material.
That is, the first hollow part sealing jig according to the present invention (Claim 1) is a jig for sealing a part of the extruded part made of an aluminum alloy in the extrusion direction in the hollow part. A pair of dam plates having an outer shape similar to the cross-sectional shape of the hollow portion of the material, a connecting rod for connecting the pair of dam plates at an interval, and the side surfaces of the pair of dam plates can be approached and separated. A pair of presser members disposed adjacent to each other and having substantially the same outer shape as each of the barrier plates, a tapered surface or a curved surface formed along the outer peripheral edge of each of the pair of barrier plates, and the pair of pressers The tapered surface or curved surface formed along the outer peripheral edge of each material is opposed to each other, and the string-like packing is closely attached to the inner wall of the hollow portion of the extruded shape material across the opposed tapered surface or curved surface. It is arranged to be possible

  According to this, when the pair of presser members are made to approach the pair of dam plates individually, the taper surfaces or curved surfaces located at the outer peripheral edges of both also approach, so these taper surfaces, the curved surfaces, Alternatively, the string-like packing is pushed outside the outer peripheral edges of the pair of barrier plates by the approach of the tapered surface and the curved surface. When the extruded portion of the packing is in close contact with the inner wall of the hollow portion of the extruded profile, a sealed space in which the mortar to be filled later does not leak out is surely disposed at a required position in the hollow portion. Is possible.

Further, in the present invention, the dam plate and the presser plate adjacent to the dam plate include a nut having a base end fixed to one of them and passing through the other, and a nut that is screw-coupled to a male screw portion of the bolt. The 1st hollow part sealing jig (Claim 2) by which the said press plate can be approached by the said dam plate by rotating is also contained.
According to this, the adjacent weir plate and the press plate can be easily and simply operated by rotating the nut that is screw-coupled to the male screw portion of the bolt whose base end is fixed to one of the barrier plate and the press plate. It can be made to approach quickly and the packing disposed across these outer peripheral edges can be pushed out to ensure close contact with the inner wall of the extruded profile.

The extruded profile may be any shape that includes a hollow portion in at least a part of its cross section.
Further, the hollow portion of the extruded shape has a rectangular cross section (square or rectangular), a substantially rectangular cross section with rounded corners at the four corners, a substantially regular triangle with rounded corners at the inner corner, and a substantially right angle. A plurality of hollow portions having a triangular or substantially isosceles triangular cross section may be arranged adjacent to each other.
Further, the connecting rod has, for example, a configuration in which a male screw portion at both ends of one bottle or a plurality (two or more) parallel bolts and a male screw portion at both ends are screw-coupled to the pair of barrier plates. In addition, both ends of one or two or more metal bars may be welded or bonded to a pair of barrier plates.
In addition, the pair of presser plates is not limited to a flat plate as long as the outer shape thereof is similar to that of the dam plate. For example, the pair of presser plates may have a substantially frame shape.
Further, the pair of presser plates are arranged adjacent to the outer surfaces of the pair of barrier plates, and bolts whose base ends are fixed to the individual presser plates pass through the adjacent barrier plates, and are connected to the male screw portions. It is good also as a form which carried out the screw connection of the nut. The fixing of the bolt includes an aspect in which the bolt can be rotated and cannot be pulled out in addition to an aspect in which the bolt is integrated by welding or the like.
Alternatively, the pair of presser plates are arranged adjacent to the inner side surfaces of the pair of barrier plates, and bolts whose base ends are fixed to the individual barrier plates pass through the adjacent presser plates, and the male screw portions thereof It is good also as a form which carried out the screw connection of the nut. However, in the case of this form, it is necessary to provide each holding plate with a through hole or a notch through which the connecting rod can be inserted.

Furthermore, a second hollow part sealing jig according to the present invention (Claim 3) is a jig for sealing a part of the hollow part of an extruded shape member made of an aluminum alloy in the extrusion direction. A pair of dam plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the material, a connecting rod for connecting the pair of dam plates at intervals, and along the outer peripheral edge of each of the pair of dam plates And a water-swelling material for water-expanded rubber arranged in the manner described above.
According to this, after inserting a 2nd hollow part sealing jig in the predetermined position in the hollow part of an extrusion shape member, the water stop rubber waterproofing material arrange | positioned along the outer periphery of every said pair of dam plates By simply bringing water into contact therewith, the water-stopping material can be expanded and brought into close contact with the inner wall of the hollow portion easily and quickly. Therefore, it is possible to reliably seal a part in the extrusion direction in the hollow portion of the extruded profile constituting the bridge slab described later.
In addition, you may divert a part of water contained in the mortar with which the sealed space is filled with the water contacted with the said water stop material.

In addition, a third hollow part sealing jig according to the present invention (Claim 4) is a jig for sealing a part in the extrusion direction in the hollow part of an extruded shape member made of an aluminum alloy. A pair of dam plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the profile member, a connecting rod for connecting the pair of dam plates at an interval, and an outer surface of the pair of dam plates. Or inflatable between one dam plate and the lid plate closing the end of the hollow part and between the dam plate of another hollow sealing jig inserted adjacently And a special balloon.
According to this, after inserting the 3rd hollow part sealing jig in the predetermined position in the hollow part of an extrusion shape member, it is adjoining to the outer surface of the pair of dam boards, or is inserted adjacently. By inflating a balloon disposed between a dam plate of another hollow portion sealing jig, the balloon can be easily and quickly brought into close contact with the inner wall of the hollow portion. Therefore, it is possible to reliably seal a part in the extrusion direction in the hollow portion of the extruded profile constituting the bridge slab described later.
The balloon is made of a strong and flexible synthetic rubber or synthetic resin, and is inflated by forcibly filling a gas such as air or nitrogen gas. For example, the blow-in tube of the balloon penetrates a through-hole opened in the barrier plate, or a through-hole opened in the cover plate that closes the opening at both ends of the bottom wall of the extruded shape member or the hollow portion of the extruded shape member. The balloon can be inflated by blowing high-pressure air from the blowing tube.

  A fourth hollow part sealing jig according to the present invention (Claim 5) is a jig for sealing a part in the extrusion direction in the hollow part of an extruded shape member made of an aluminum alloy. Adjacent among a plurality of dam plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the material, and a plurality of through holes opened along the extrusion (longitudinal) direction on the bottom wall of the extruded shape material Between the pair of dam plates inserted in the hollow portion near the two through holes and between the dam plate inserted in the hollow portion near the through holes on both ends of the extruded shape member and the openings at both ends of the hollow portion. A connecting rod that connects the lid plate with a gap, a hollow portion between the pair of barrier plates, and a hollow portion between the barrier plate and the lid plate, and at a position excluding the connecting rod. And an inflatable balloon disposed.

According to this, after inserting the fourth hollow portion sealing jig at a predetermined position in the hollow portion of the extruded profile and fixing the lid plate to the end surface of the extruded profile, between the pair of barrier plates, Further, by inflating each balloon disposed between the dam plate and the lid plate, the balloon can be easily and quickly brought into close contact with the inner wall of the hollow portion, except for the vicinity of the plurality of connecting rods. Therefore, it is possible to reliably seal a part in the extrusion direction in the hollow portion of the extruded profile constituting the bridge slab described later.
The balloon has a substantially C shape or donut shape, or a pair of symmetrical substantially cloud shapes, or substantially E shapes along the extrusion direction of the extruded shape member. A plurality of (for example, two upper and lower) connecting rods are positioned without hindrance to expansion of the balloon.

Furthermore, a fifth hollow part sealing jig according to the present invention (Claim 6) is a jig for sealing a part in the extrusion direction in the hollow part of an extruded shape member made of an aluminum alloy. A pair of dam plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the material, a connecting rod for connecting the pair of dam plates at an interval, and an interval between each pair of dam plates A pair of partition plates that are placed in parallel and have the same outer shape as each barrier plate, and an inflatable balloon that is disposed between the adjacent barrier plate and the partition plate so as to be radially expandable. Including.
According to this, the fifth hollow portion sealing jig is inserted in the vicinity of the through hole in the hollow portion of the extruded shape member, and each balloon disposed between the weir plate and the cover plate adjacent to each other. By inflating, each balloon can be easily and quickly brought into close contact with the inner wall of the hollow portion of the extruded profile. Therefore, it is possible to reliably seal a part in the extrusion direction in the hollow portion of the extruded profile constituting the bridge slab described later.
The balloon has, for example, a generally donut shape as a whole, and is disposed around a connecting rod that connects the central portions of the adjacent weir plate and partition plate, and blows high pressure air from the outside of the extruded shape member. It is possible.

  On the other hand, a method for installing a bridge floor slab according to the present invention (Claim 7) includes a plurality of stud gibels along the longitudinal direction of the main girder on the upper surface of each of the main girder laid in parallel on the pier. And in an extruded shape made of an aluminum alloy and constituting a floor slab, in a hollow portion located immediately above a through hole opened in a bottom wall of the extruded shape, A hollow portion sealing jig is inserted so that the pair of dam plates sandwich the through hole, and the packing is moved from the outer peripheral side of each dam plate to the inner wall side of the hollow portion, or the water expansion rubber water stop A step of bringing the material into contact with water or inflating the balloon to closely contact the inner wall of the hollow portion; and an extruded shape member in which the hollow portion sealing jig is inserted into the hollow portion near the through hole. The extrusion direction at a right angle above the plurality of main girders, and In a state where the dodge is inserted into the hollow portion sandwiched between the pair of dam plates through the through hole, the step of placing through the mold, the hollow portion sandwiched between the dam plates of the jig, and immediately below And a step of filling and curing the mortar so as to surround the stud dowel in a space surrounded by the mold.

According to this, the hollow portion sealing jig is inserted along the extrusion direction in the vicinity of the through hole in the hollow portion of the extruded shape member constituting the bridge floor slab, and the pair of presser plates are By approaching the pair of weir plates and pushing the packing outward, the water contained in the filled mortar is brought into contact with the packing of the water-expandable rubber to inflate, or by inflating the balloon, packing or The balloon can be securely adhered to the inner wall of the hollow portion of the extruded shape member, and the space between the pair of barrier plates can be reliably sealed from the outside.
As a result, the mortar located in the sealed space sandwiched between the pair of dam plates is sealed, and the mortar does not deteriorate, so that the support strength of the floor slab against the main girder is less likely to be reduced, and maintenance work is reduced. It is also possible to contribute to this.

Further, according to the present invention, the floor slab is composed of a profile unit in which a plurality of the extruded profiles are joined along a direction orthogonal to the extrusion direction, and a through-hole formed in a bottom wall of each extruded profile is formed. The hollow portion sealing jig is inserted in the immediate vicinity, and the packing is moved from the outer peripheral edge side of each barrier plate to the inner wall side of the hollow portion or the mortar is attached to the water stop rubber waterproofing material. An installation method of a bridge slab that makes contact with water inside or from outside, or inflates the balloon so that the packing, water blocking material, or balloon is in close contact with the inner wall of the hollow part (claim) 8) is also included.
According to this, since the bridge floor slab is composed of a profile unit in which a plurality of the extruded profiles are joined, a plurality of the units are manufactured in advance, and the penetrations in the hollow portions of the extruded profiles constituting these units are made. By inserting the hollow part sealing jig near the hole and bringing the packing, water-stopping material, or balloon in close contact with the inner wall of the hollow part, the number of constructions at the site can be reduced. Can be reduced.
Moreover, at the site, in the hollow part of the extruded shape member, it is possible to efficiently and quickly construct the bridge welded plate simply by performing a process of filling and curing the mortar between a pair of barrier plates in the hollow part sealing jig. Is possible.

In the following, the best mode for carrying out the present invention will be described.
FIG. 1 is a perspective view showing a first hollow portion sealing jig 1 according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view thereof.
As shown in FIGS. 1 and 2, the hollow portion sealing jig 1 includes a pair of left and right weir plates 2a and 2b and three horizontal (multiple) connecting bolts (connecting rods) that connect them at intervals. 4 and a pair of left and right presser plates 6a and 6b disposed so as to be able to approach and separate from the outer surfaces of the dam plates 2a and 2b. The connecting bolt 4 is composed of one upper part and two lower parts parallel to each other.
The pair of dam plates 2a and 2b and the pair of presser plates 6a and 6b are made of a metal plate or a synthetic resin plate, and the hollow portion of the extruded shape member for floor slab structure into which the hollow portion sealing jig 1 is inserted later. The outer shape is similar to the cross-sectional shape, and taper surfaces 3 and 7 are formed in opposite directions on the outer peripheral edges facing each other.

As shown in FIGS. 1 and 2, a base end portion of a bolt b is fixed and a male screw is projected horizontally in the vicinity of the center of the inner surface of the pair of pressing plates 6a and 6b. The bolt b passes through the through holes 5 of the adjacent weir plates 2a and 2b, and is screwed to the nut n via a washer z. The retainer plates 6a and 6b can be brought closer to the weir plates 2a and 2b by rotating the nut n forward. When the nut n is rotated in the reverse direction, it can be separated. The bolt b may be attached (fixed) so that its base end can be rotated to the press plates 6a and 6b and cannot be pulled out.
Tapered surfaces facing string-like packing p made of synthetic rubber having a substantially elliptical cross section along the outer periphery of adjacent weir plate 2a and presser plate 6a and the outer periphery of adjacent weir plate 2b and presser plate 6b It is wound over 3 and 7. As shown in FIG. 2, the presser plates 6a and 6b are separated from the barrier plates 2a and 2b so that a gap 8 is interposed between the adjacent barrier plates 2a and the presser plates 6a and between the barrier plates 2b and the presser plates 6b. In this state, the packing p is not extended, and the outer peripheral portion thereof is located slightly outside the outer shape of the weir plates 2a and 2b and the holding plates 6a and 6b.

FIG. 3 shows the hollow part sealing jig 1 from the opening at one end along the longitudinal (extrusion) direction in the hollow part S of the extruded profile E1 (E2) constituting the bridge slab described later. Inserted and moved into the hollow portion S near the top of the through hole h opened in the bottom wall of the extruded profile E1 (E2), and the dam plate 2a, the holding plate 6a and the dam plate 2b on both sides of the through hole h, It is a vertical sectional view showing a state where the presser plate 6b is arranged. In this state, a spanner or the like is inserted from the through hole h, the nut n is rotated forward, and the nut n is moved to the base end side of the bolt b.
As a result, as shown in FIG. 4, the holding plates 6a and 6b approach the weir plates 2a and 2b, and the gap 8 between them is eliminated. At the same time, since the taper surfaces 3 and 7 of the weir plates 2a and 2b and the holding plates 6a and 6b are adjacent to each other, the packing p straddling them is pushed outward and the hollow portion of the extruded shape member E1 (E2). Adheres to the inner wall of S. Thus, a sealed space that is sandwiched between the weir plates 2a and 2b including the extended packing p and sealed from the outside can be reliably formed in the hollow portion S near the through hole h.

FIG. 5 is a vertical cross-sectional view showing a hollow portion sealing jig 1 a which is an application form of the sealing jig 1. As shown in FIG. 5, the sealing jig 1a also includes a pair of dam plates 2a and 2b similar to the above, a plurality of connecting bolts 4, a pair of pressing plates 6a and 6b, and a pair of packings p. ing. A pair of bolts b penetrates through the through holes 5 and 9 of the adjacent weir plate 2a, presser plate 6a and weir plate 2b, and presser plate 6b. The screw hole 11 is screwed. In addition, the large diameter part d is located in the front-end | tip of the said volt | bolt b, and the sealing material s is clamped between this and the pressing plates 6a and 6b.
According to the hollow part sealing jig 1a as described above, a pin-shaped tool inserted from the through hole h after being disposed in the vicinity of the through hole h in the hollow part S of the extruded profile E1 (E2). Alternatively, by simply rotating the turnbuckle 10 with a bare hand, the presser plates 6a and 6b are simultaneously brought close to the weir plates 2a and 2b, and the packings p are pushed outward over the entire circumference to be brought into close contact with the inner wall of the hollow portion S. Is possible.

  The left side of FIG. 6 shows a form in which curved surfaces r that bulge outward are formed symmetrically on the outer peripheral edges of the adjacent weir plates 2a (2b) and presser plates 6a (6b). As shown in the hollow portion sealing jig 1, the nut n is rotated forward, or the turn buckle 10 is rotated as shown in the sealing jig 1a. In this manner, the adjacent curved surfaces r and r are brought close to each other, and the packing p is pushed outward by the width w over the entire circumference, so that it can be brought into close contact with the inner wall of the extruded shape member E1 (E2) hollow portion S.

Next, an installation method of the bridge slab according to the present invention using the hollow portion sealing jig 1 will be described.
As shown in FIG. 7, a plurality of extruded shape members E1, E2 made of an aluminum alloy (for example, JIS: A6N01S-T5, A6061S-T6) are joined in advance to produce a floor slab unit U. The floor slab unit U is composed of one or a plurality of extruded profiles E1 for intermediate use and an extruded profile E2 for ends joined to both ends thereof.
As shown on the left side in FIG. 7, the intermediate extruded shape E <b> 1 has an upper horizontal surface plate 12, a lower horizontal bottom wall 16, a pair of left and right side walls 15, and a substantially rectangular cross section surrounded by these. And a cross section composed of a pair of long and short flanges 14 and 17 extending left and right from the surface plate 12 and the bottom wall 16 along the entire length in the front-rear direction shown in the figure.

On the other hand, as shown on the right side in FIG. 7, the extruded shape E2 for the end portion is surrounded by the upper horizontal surface plate 13, the lower horizontal bottom wall 16, the pair of left and right side walls 15, and these. A cross section comprising a hollow portion S having a substantially square cross section, the same flange 14 extending only in one side, a pair of left and right flanges 17 and a protruding piece 18 extending horizontally from a position lower than the surface of the surface plate 13 Along the entire length of the direction. A curved surface 19 that is recessed upward is formed between the base of the protruding piece 18 and the surface of the surface plate 13. Whether the height from the surface of the surface plate 13 to the upper surface of the projecting piece 18 is the same as the total value of the height of the bolt head, the thickness of the washer, and the thickness of the attachment plate disposed on the upper side It is slightly larger than the total value.
Note that through holes h having a rectangular shape in plan view are formed by notching at a plurality of positions along the longitudinal (extrusion) direction in the bottom wall 16 of the extruded shape members E1 and E2.

In order to form the floor slab unit U, the distal end portions of the flanges 14 and 14 of the intermediate extruded shape members E1 and E1, and the intermediate extruded shape member E1 and the extruded shape for the end portion to be connected adjacently. For example, a known friction stir welding (FSW) is performed on the end portions of the flanges 14 with the material E2.
That is, a plurality of extruded profiles E1 or extruded profiles E1 and E2 to be connected are constrained in a state where the tip surfaces of both flanges 14 are in contact with each other, and along the abutting surfaces of these adjacent flanges 14 and 14. Then, a joining tool composed of a cylindrical main body from at least one of the lower side and the upper side and a stirring pin extending coaxially from the center of the bottom is rotated at high speed and moved while being pushed in along the axial direction.

As a result, as shown in the center of FIG. 7, the ends of the flanges 14 and 14 of the extruded profiles E1 and E2 are formed by a pair of upper and lower joints wa and wb in which the aluminum alloy is frictionally stirred and solidified in a solid state. Be joined. Then, when the flanges 14 are horizontally connected to the intermediate extrusions E1 and E1 and the extrusions E2 and E2 for the ends located on both outer sides thereof, the surface plates 12, A floor slab unit U in which the surfaces of 13 are continuously joined together is formed. A plurality of the floor slab units U are formed.
The floor slab unit U is not limited to the above-described form, and may have a form in which the extruded part E2 for the end portion is joined to both outer sides of one intermediate shaped extruded part E1. Further, the joining of the plurality of extruded shapes E1 and E2 is not limited to the FSW but may be performed by welding such as MIG.

Next, as shown in FIG. 8, the hollow portion sealing jig 1 is inserted into the hollow portion S of the extruded shape member E <b> 1 (E <b> 2) from the opening side at one end, and the through hole h opened in the bottom wall 16. The through hole h is stopped at a position where the pair of left and right weir plates 2a and 2b are sandwiched. In this state, the left and right nuts n are each rotated forward in the same manner as in the previous period.
As a result, as shown in FIG. 9, the holding plates 6a and 6b approach the weir plates 2a and 2b, and the taper surfaces 3 and 7 thereof approach each other, whereby the packing p is pushed outward and the extruded shape E1. A space that is in close contact with the inner wall of the hollow portion S of (E2) and is sealed from the outside by a pair of dam plates 2a and 2b is formed in the vicinity immediately above the through hole h.
The insertion process of the hollow part sealing jig 1 and the contact process of the packing p as described above are performed in the hollow parts S of the extruded shape members E1 and E2 constituting all the floor slab units U.

On the other hand, as shown in FIG. 10, a plurality of main girders 20 having a vertical cross section are laid in parallel at the center portion and fixed over a plurality of unillustrated piers constructed at the site to be bridged. The main girder 20 is formed of a substantially I-shaped cross section steel or a similar cross-section I-shaped steel girder in which a plurality of steel plates are welded, and a pair of upper and lower flanges 21 and 22 and a vertical connecting these central portions. It consists of a web 23.
As shown in FIG. 10, a plurality of (three or more) studs Jihel 24 are assembled on the upper surface of the upper flange 21 at intervals in the longitudinal direction of the main girder 20 by fusion. An integral large-diameter portion is located at the upper end of each stud jigher 24. It should be noted that the stud jigher 24 to be implanted on the main beam 20 may have an arbitrary number and may be arranged in a direction other than the width direction.

  Next, the floor slab unit U composed of the extruded shape members E1 and E2 equipped with a plurality of hollow portion sealing timepieces 1 in which the packing p is brought into close contact with the hollow portion S is carried into the site, and a crane (not shown) is used. As shown in FIG. 11, the longitudinal direction of the main beam 20 and the extrusion (longitudinal) direction of the extruded shape member E1 (E2) are orthogonal to each other, and the set of three studs 24 is inserted. In this state, the floor slab unit U is placed on a mold 25 that is disposed on the flanges 21 of the plurality of main girders 20 and surrounds the stud jigher 24. In the extruded profile E1 (E2), a small hole k is formed in the upper surface plate 12 (13) for each through hole h.

Further, as shown in FIG. 12, the attachment plate 26 extends over the upper and lower surfaces of the protruding pieces 18, 18 whose tip portions are close to each other from the extruded shape members E 2, E 2 of the floor slab units U, U adjacent on the main girder 20. , 27 are individually arranged, a bolt B is passed through a plurality of through holes (not shown) opened in these, and nuts N are fastened to the male screw portions. At this time, the top surface of the head of the bolt B protruding on the upper attachment plate 26 is positioned slightly lower than the surface of the surface plate 13 of the extruded shape member E2. As a result, a plurality of floor slab units U are connected to form a bridge floor slab KS.
Next, in the hollow portion S of the extruded profile E1 (E2) constituting each floor slab unit U, in the sealed space sandwiched between the dam plates 2a and 2b of the sealing jig 1, and directly below the mold The space surrounded by the frame 25 and the flange 21 of the main girder 20 is filled with mortar m from the upper small hole k and cured as shown in FIG. At this time, the mortar m does not leak out from the sealed space due to the packing p of the sealing jig 1. The mortar m filling operation may be performed from a small hole (not shown) separately opened in the mold 25.

As a result, as shown in FIG. 13, a set of three stud gibels 24 erected on the main girder 20 is surrounded by the mortar m so that the bridge slab U includes a plurality of floor slab units U. The floor slab KS can be installed across a plurality of parallel main girders 20.
Then, as shown in FIGS. 14 and 15, a road surface material 28 including a base material and asphalt is laid at a predetermined thickness above the plurality of floor slab units U constituting the bridge floor slab KS. As a result, a bridge on which the vehicle can travel on the asphalt of the road surface material 28 is constructed.
It should be noted that the work of filling the mortar m into the sealed space in which the stud diver Z is inserted in the extruded shape member E2 (E1) includes the arrangement of the attachment plates 26 and 27 to the projecting pieces 18 and 18, and the bolts B · You may perform before the fastening operation | work of the nut N. FIG. However, in this case, it is necessary to pay attention so that a binding force is generated between the floor slab units U and U during the fastening operation of the bolts B and nuts N and the mortar m is not broken.

As described above, according to the installation method of the bridge slab KS using the hollow part sealing jig 1, the inside of the hollow part S for each of the extruded shape members E1 and E2 constituting the floor slab unit U of the floor slab KS. 2, a space in which the pair of left and right packings p in the sealing jig 1 are in close contact with each other and is sealed from the outside is surely formed in the vicinity of the through hole h opened in the bottom wall 16. Therefore, in the sealed space, the filled mortar m does not leak to the outside while surrounding the stud gibber 24 erected from above the main girder 20, so that the deterioration of the mortar m as in the past and accompanying this A decrease in the support strength of the floor slab can be reliably suppressed. Accordingly, the frequency of maintenance work and construction can be reduced.
For the installation method of the bridge slab KS, the hollow portion sealing jig 1a is used, or the curved surface r is formed along the outer peripheral edges of the dam plates 2a, 2b and the pressers 6a, 6b. A partial sealing jig may be used.

FIG. 16 is a vertical cross section showing the second hollow portion sealing jig 1b according to the present invention and a state in which this is inserted into the hollow portion S of the extruded shape member E1 (E2).
As shown in FIG. 16, the hollow portion sealing jig 1b includes a pair of left and right weir plates 2a and 2b, a plurality of horizontal connecting bolts (connecting rods) 4 connecting them, and the weir plate 2a, A pair of left and right water-swelling rubber water stop materials wp disposed along the outer periphery of each 2b. The water blocking material wp has a substantially circular cross section and a concave groove u that receives the outer peripheral edges of the barrier plates 2a and 2b along the entire circumference of the inner peripheral surface.
The rubber component of the water expansion rubber of the water blocking material wp is made of synthetic rubber or natural rubber. Examples of the synthetic rubber include styrene butadiene rubber (SBR), isoprene rubber (IR), polybutadiene rubber (BR), and acrylo. Nitri rubber (NBR), acrylic rubber (ACM), ethylene propylene rubber (EPDM), kuroprene rubber (CR), fluorine rubber, urethane rubber, acrylic-butadiene rubber (ABR), acrylonitrile-isoprene rubber (NIR), acrylonitrile- cloprene rubber ( NCR).

The water expansion rubber of the water blocking material wp is, for example, further 5 to 100 parts by weight of a high water supply resin, 1 to 30 parts by weight of a polyalkyleon oxide derivative, and 1 to 100 parts by weight of the rubber component. A water-expanded rubber composition containing 20 parts by weight of a thermosetting polyurethane is vulcanized and molded.
As shown in FIG. 17, the extruded section E1 (E2) is placed on the mold 25 on the main girder 20 and is sealed in the hollow portion disposed near the through hole h opened in the bottom wall 16. The mortar m is filled from the small hole k into the space surrounded by the hollow portion S between the dam plates 2a and 2b of the jig 1b and the mold 25 just below the hollow portion S. At this time, a part of the water contained in the mortar m comes into contact with the pair of water-stopping materials wp made of the water expansion rubber. As a result, the water blocking material wp expands in the radial direction in the cross section, so that the outer peripheral portion is in close contact with the wall surface of the hollow portion S. As a result, the hollow portion S between the barrier plates 2a and 2b is sealed from the outside, so that the mortar m to be filled later does not leak out between the barrier plates 2a and 2b.

  The second hollow portion sealing jig 1b including the water stop material wp made of the water expansion rubber as described above does not require the holding plates 6a and 6b, bolts b, and nuts n such as the sealing jigs 1 and 1a. Therefore, the structure is simple and can be manufactured at low cost. Moreover, when used in the installation method, after being inserted in the vicinity of the through hole h in the hollow portion S of the extruded shape members E1 and E2 placed on the main girder 20, only the mortar m is filled. Thus, since the water stop material wp is automatically expanded and can be surely adhered to the inner wall of the hollow portion S, the construction in the installation method of the bridge floor slab KS can be easily and quickly performed. Furthermore, since the mortar m is hardly deteriorated, it is possible to reduce maintenance work and construction work such as repair.

FIG. 18 is a vertical cross section showing the third hollow part sealing jig 1c according to the present invention and a state in which this is inserted into the hollow part S of the extruded profile E1 (E2).
As shown in the upper side of FIG. 18, the hollow portion sealing jig 1c includes a pair of left and right weir plates 2a and 2b, a plurality of horizontal connecting bolts (connecting rods) 4 for connecting them, and the weir Large and small balloons B1a and B2a that are in contact with the outer surface of each of the plates 2a and 2b are provided. The balloons B1a and B2a are made of a strong and flexible synthetic rubber or synthetic resin sheet and have one blowing tube e such as air. The blow tube e passes through the through hole 5 opened at the center of the dam plates 2a and 2b, and the vicinity of the base end of the blow tube e is partially bonded to the outer surface of the dam plates 2a and 2b.
As shown on the upper side in FIG. 18, in the hollow portion S of the extruded profile E1 (E2) constituting the floor slab unit U, in the vicinity immediately above each of the pair of left and right through holes h opened in the bottom wall 16, After the pair of hollow portion sealing jigs 1c are inserted in the same manner as described above, the openings at both ends of the hollow portion S are closed with the lid plate f. In this state, as indicated by the one-dot chain line arrow, high-pressure air or nitrogen gas is blown into the balloons B1a and B2a from the blow-in tubes e.

As a result, as shown below by the white arrow in FIG. 18, the dam plates 2b, 2a adjacent to the pair of right and left sealing jigs 1c, 1c in the hollow portion S of the extruded profile E1 (E2). In the meantime, the large pair of balloons B1a is inflated to form a balloon B1b, which is in close contact with the inner wall of the hollow portion S between the barrier plates 2b and 2a.
On the other hand, the pair of small balloons B2a are inflated to become balloons B2b, and are sandwiched between the cover plates f at both ends of the hollow portion S of the extruded shape member E1 (E2) and the weir plates 2a and 2b of the sealing jigs 1c. It adheres to the inner wall of the hollow part S.
Thereby, since the hollow part S between the dam plates 2a and 2b of each sealing jig 1c is sealed from the outside, the mortar m to be filled later does not leak out from between the dam plates 2a and 2b. It should be noted that the blow-in tubes e of the balloons B1b and B2b after being inflated are closed at the intermediate portion on the base end side.

FIG. 19 is a vertical cross section showing a third hollow portion sealing jig 1d having a different form and a state in which this is inserted into the hollow portion S of the extruded shape member E1 (E2).
As shown on the upper side in FIG. 19, the hollow portion sealing jig 1d is adjacent to a pair of left and right weir plates 2a and 2b similar to the above and a plurality of horizontal connecting bolts (connecting rods) 4 connecting them. In the hollow portion S between the dam plates 2a and 2b of another sealing jig 1d, and the hollow portion S between the outer dam plates 2a and 2b and the cover plate f closing the end of the hollow portion S. The provided balloons B1a and B2a are provided.
As shown on the upper side in FIG. 19, the balloon B1a disposed in the hollow portion S between the pair of left and right sealing jigs 1d, 1d is an insertion hole 16a opened in the bottom wall 16 of the extruded shape member E1 (E2). From the insertion hole 16a to the outside. On the other hand, a pair of balloons B2a disposed in the vicinity of both ends of the hollow portion S are attached to the inside of each lid plate f that closes the openings at both ends of the hollow portion S. It penetrates the board f and comes out to the outside. The insertion hole 16a may be configured to be closed with a plate material that allows the blowing tube e to pass through after the balloon B1a is inserted into the hollow portion S.

As shown on the upper side in FIG. 19, in the hollow portion S of the extruded profile E1 (E2) constituting the floor slab unit U, in the vicinity immediately above each of the pair of left and right through holes h opened in the bottom wall 16, A pair of hollow portion sealing jigs 1d are inserted in the same manner as described above, a balloon B1a is disposed in the hollow portion S between them, and the openings at both ends of the hollow portion S are attached with the balloon B2a inside. It is closed with a plate f. In this state, as indicated by the arrows in the figure, high-pressure air or nitrogen gas is blown into the balloons B1a and B2a from the blow-in tubes e.
As a result, the balloon B1a is inflated between the pair of sealing jigs 1d and 1d in the hollow portion S of the extruded profile E1 (E2) as shown below by the white arrow in FIG. Then, it becomes a horizontally long balloon B1b and is in close contact with the inner wall of the hollow portion S between the sealing jigs 1d and 1d.
On the other hand, the pair of balloons B2a is inflated to become a balloon B2b, and is sandwiched between the cover plates f at both ends of the hollow portion S of the extruded shape member E1 (E2) and the weir plates 2a and 2b of each sealing jig 1d. In close contact with the inner wall of the hollow portion S.
Thereby, since the hollow part S between the dam plates 2a and 2b for each sealing jig 1d is sealed from the outside, the mortar m to be filled later does not leak out from between the dam plates 2a and 2b.

  The third hollow portion sealing jigs 1c and 1d including the balloons B1a and B2a as described above have a simple structure and can be easily manufactured as compared with the sealing jigs 1 and 1a. In addition, when used in the installation method, the high-pressure air is applied to the balloons B1a and B2a after being inserted in the vicinity of the through hole h in the hollow portion S of the extruded shape members E1 and E2 placed on the main beam 20. Since the inflated balloons B1b and B2b can be reliably brought into close contact with the inner wall of the hollow portion S by the operation of blowing in, etc., the construction in the installation method of the floor slab KS can be made easily and quickly. Furthermore, since the mortar m is hardly deteriorated, it is possible to reduce maintenance work and construction work such as repair.

FIG. 20 is a vertical cross section showing a fourth hollow part sealing jig 1e according to the present invention and a state in which this is inserted into the hollow part S of the extruded profile E1 (E2).
As shown in the upper side of FIG. 20, the hollow portion sealing jig 1 e is inserted in the hollow portion S of the extruded shape member E <b> 1 (E <b> 2) and in the vicinity of each of the plurality of through holes h opened in the bottom wall 16. A plurality of barrier plates 2a and 2b, and a pair of cover plates f and hollows closing the openings between the pair of barrier plates 2b and 2a inserted into the hollow portion S in the vicinity of the adjacent through hole h and at both ends of the hollow portion S The upper and lower two (plurality) connecting bolts (connecting rods) 4 connecting between the weir plates 2a and 2b inserted in the vicinity of the through holes h on both ends of the part S, and the pair of weir plates 2b and 2a , And inflatable balloons B3a and B4a disposed in the hollow portion S between the lid plates f and the weir plates 2a and 2b and at positions excluding the connecting bolts 4.

In addition, the said bolt 4 which connects between the dam boards 2b and 2a etc. may be one.
Further, the balloons B3a and B4a are arranged in the hollow portion S of the extruded shape member E1 (E2) and vertically 2 as shown by a partial visual sectional view X along the line XX in FIG. A shape that is substantially C-shaped or donut-shaped occupying a position excluding the connecting bolt 4 or a pair of symmetrical clouds, or substantially E-shaped, as shown by a partial sectional view Y in FIG. At the same time, when high-pressure air or the like is blown, it can be expanded along the longitudinal (axial) direction of the hollow portion S. Further, the blowing tube e of the balloon B3a communicates with the outside through the insertion hole 16a opened in the bottom wall 16, and the blowing tubes e of the left and right balloons B4a communicate with the outside through the cover plate f. .
As shown in the upper part of FIG. 20, a plurality of dam plates 2a and 2b and a cover plate f connected to each other by a connecting bolt 4 constituting the hollow portion sealing jig 1e in the hollow portion S of the extruded shape member E1 (E2). , And balloon balloons B3a and B4a are inserted. At this time, the weir plates 2a and 2b are located in the vicinity of the upper portions of the extruded shape member E1 (E2) so as to sandwich the plurality of through holes h opened in the bottom wall 16. In this state, as indicated by arrows in FIG. 20, high-pressure air or the like is blown into the balloons B3a and B4a from the blow-in tubes e.

As a result, as shown below by the white arrow in FIG. 20, in the hollow portion S of the extruded shape member E1 (E2), between the pair of weir plates 2b and 2a between the adjacent through holes h and h. The balloon B3a is inflated to become a horizontally long balloon B3b except for the vicinity of each connecting bolt 4, and is in close contact with the inner wall of the hollow portion S between the barrier plates 2b and 2a.
On the other hand, the pair of balloons B4a is inflated to become a balloon B4b, and is sandwiched between the cover plates f at both ends of the hollow portion S of the extruded shape member E1 (E2) and the closest weir plates 2a and 2b. In close contact with the inner wall of the hollow portion S.
Accordingly, the hollow portion S between the dam plates 2a and 2b of the hollow portion sealing jig 1e is sealed from the outside, so that the mortar m to be filled later does not leak out from between the dam plates 2a and 2b. .
Therefore, the fourth hollow part sealing jig 1e as described above can perform the same operation as the third sealing jigs 1c and 1d, and can achieve the effect.

21 and 22 are vertical cross sections showing a fifth hollow portion sealing jig 1f according to the present invention and a state in which this is inserted into the hollow portion S of the extruded profile E1 (E2).
As shown in FIG. 21, the fifth hollow portion sealing jig 1 f is inserted in the hollow portion S of the extruded shape member E <b> 1 (E <b> 2) and in the vicinity of each of the plurality of through holes h opened in the bottom wall 16. A pair of partition plates 30a attached via a pair of barrier plates 2a, 2b, a plurality of connecting bolts 4 connecting them, and a connecting rod 29 extending from the center of the outside of each barrier plate 2a, 2b. , 30b, and a pair of balloons B5a that are disposed between them and are radially expandable. These can be previously unitized.
The balloon B5a as a whole has a donut shape as a whole having a through hole through which the connecting rod 29 penetrates at the center. Each balloon B5a communicates with a substantially T-shaped blowing tube e that penetrates the weir plates 2a and 2b.

As shown in FIG. 21, in the hollow portion S of the extruded shape member E1 (E2), the hollow portion sealing jig 1f is inserted so that the dam plates 2a and 2b are positioned on both sides of the through hole h. At this time, the blowing pipe e extends upward from the small hole k. In this state, as indicated by the arrows in FIG. 21, high-pressure air or the like is blown into each balloon B5a from each blowing tube e.
As a result, as shown in FIG. 22, in the hollow portion S of the extruded shape member E1 (E2), each balloon B5a expands in the radial direction and adheres closely to the inner wall of the hollow portion S.
Accordingly, the hollow portion S between the dam plates 2a and 2b of the hollow portion sealing jig 1f is sealed from the outside, so that the mortar m to be filled later does not leak out from between the dam plates 2a and 2b. .
Therefore, the fifth hollow portion sealing jig 1f as described above can perform the same operation as the sealing jigs 1c, 1d and the like, and can also provide an effect.

The present invention is not limited to the embodiments described above.
For example, in the sealing jigs 1 and 1a, instead of the bolts b and nuts n, frame-like pressing plates 6a and 6b arranged at intervals on the inner surfaces of the weir plates 2a and 2b are axially arranged by coil springs. It is good also as a form made to approach the inner surface of the dam boards 2a and 2b with the expansion-contraction stick | rod extended, the pantograph containing a link mechanism, etc.
Moreover, you may form the compound surface which combined the taper surface and the curved surface along the perimeter in the outer periphery of the said dam boards 2a and 2b and the holding plates 6a and 6b.
Further, the connecting rod of the sealing jig may have a form in which only one bolt or three or more bolts are arranged at appropriate positions, and is not limited to the connecting bolt 4 and connects the weir plates 2a and 2b. Therefore, it is good also as a metal stick fixed to these inner surfaces.
Further, the cross-sectional shape of the packing p or the water blocking material wp is not limited to the above-described form as long as it does not hinder the insertion of the extruded profile into the hollow part or the close contact with the wall surface of the hollow part. Any cross-sectional shape can be used.
In addition, the balloon used for the fourth and fifth sealing jigs can have any shape as long as it does not interfere with a plurality of connecting rods and connecting rods.

The perspective view which shows one form of the 1st hollow part sealing jig by this invention. The vertical sectional view of the above-mentioned hollow part sealing jig. The vertical sectional view which shows the use condition of the said hollow part sealing jig. The vertical sectional view which shows the use condition of the said hollow part sealing jig following FIG. The vertical sectional view which shows the hollow part sealing jig which is an application form of the said sealing jig. Schematic of the form which provided the curved surface in the outer periphery of the dam plate of the said sealing jig, and a pressing board. The end view which shows the extrusion profile used for the installation method of the floor slab for bridges by this invention. Schematic which shows the insertion process of the said sealing jig in the said installation method. Schematic which shows the contact | adherence process following FIG. Schematic which shows another process in the said installation method. Schematic which shows the mounting process following FIG. 9, FIG. Schematic which shows the floor slab formation process following FIG. Schematic which shows the mortar filling process following FIG. Schematic which shows the laying process of the road surface material following FIG. Schematic which shows the laying process of FIG. 14 by different vision. The vertical sectional view which shows the 2nd hollow part sealing jig by this invention. The vertical sectional view which shows the use condition of the said hollow part sealing jig. The vertical sectional view showing the 3rd hollow part sealing jig etc. by the present invention. The vertical sectional view which shows the 3rd hollow part sealing jig etc. of a different form. The vertical sectional view showing the 4th hollow part sealing jig etc. by the present invention. The vertical sectional view showing the 5th hollow part sealing jig etc. by the present invention. The vertical sectional view which shows the use condition of the said hollow part sealing jig.

Explanation of symbols

1, 1a to 1f ..................... Hollow part sealing jig 2a, 2b ........................... ………… Dam plate 3, 7 ……………………………… ... Tapered surface 4 ………………………………………… Connecting bolt (connecting rod)
6a, 6b ……………………………… Presser plate 20 …………………………………… Main girder 24 …………………………………… Stud gibber 25 …………………………………… Forms 30a, 30b ……………………… Partition plate r ……………………………………… Curved surface b, b1, b2 ………………………… Bolt n ……………………………………… Nut p ……………………………………… Packing wp …… ……………………………… Water-stopping materials B1a, B1b to B5a, B5b… Balloon E1, E2 …………………………… Extruded profile U …………………… ………………… Slab unit S ……………………………………… Hollow h ……………………………………… Through hole f ……… ……………………………… Cover plate m ……………………………………… Rutar KS …………………………………… Bridge floor slab

Claims (8)

A jig for sealing a part of the extrusion direction in the hollow part of the extruded shape made of an aluminum alloy,
A pair of weir plates having an outer shape similar to the cross-sectional shape of the hollow portion of the extruded profile;
A connecting rod for connecting the pair of weir plates at intervals;
A pair of pressers disposed adjacent to the side surfaces of each of the pair of dam plates so as to be close to and away from each other, and having substantially the same outer shape as each of the dam plates;
The tapered surface or curved surface formed along the outer peripheral edge of each of the pair of dam plates and the tapered surface or curved surface formed along the outer peripheral edge of each of the pair of pressing members are opposed to each other. The string-like packing is disposed so as to be able to be in close contact with the inner wall of the hollow portion of the extruded shape member over the tapered surface or the curved surface.
A hollow part sealing jig characterized by that. The barrier plate and the presser plate adjacent to the barrier plate have either one of the fixed bolts passing through the other and rotating a nut that is screw-coupled to the male screw portion of the bolt, so that the presser plate is It is supposed to be accessible to the weir plate,
The hollow part sealing jig according to claim 1, wherein: A jig for sealing a part of the extrusion direction in the hollow part of the extruded shape made of an aluminum alloy,
A pair of weir plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the extruded profile,
A connecting rod for connecting the pair of weir plates at intervals;
A water-swelling material of water expansion rubber disposed along the outer peripheral edge of each of the pair of dam plates,
A hollow part sealing jig characterized by that. A jig for sealing a part of the extrusion direction in the hollow part of the extruded shape made of an aluminum alloy,
A pair of weir plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the extruded profile,
A connecting rod for connecting the pair of weir plates at intervals;
A dam plate of another hollow portion sealing jig that is inserted between or adjacent to the outer surfaces of the pair of dam plates or between the one dam plate and a lid plate that closes the end of the hollow portion. An inflatable balloon disposed between
A hollow part sealing jig characterized by that. A jig for sealing a part of the extrusion direction in the hollow part of the extruded shape made of an aluminum alloy,
A plurality of weir plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the extruded profile,
Among a plurality of through holes established in the extrusion direction on the bottom wall of the extruded shape member, between a pair of weir plates inserted in the hollow portions near the two adjacent through holes, and both end sides of the extruded shape member A connecting rod that connects the weir plate inserted in the hollow portion in the vicinity of the through-hole and the lid plate that closes the openings at both ends of the hollow portion with a gap,
A hollow portion between the pair of barrier plates, and an inflatable balloon disposed in a hollow portion between the barrier plate and the cover plate and at a position excluding the connecting rod,
A hollow part sealing jig characterized by that. A jig for sealing a part of the extrusion direction in the hollow part of the extruded shape made of an aluminum alloy,
A pair of weir plates having an outer shape similar to the substantially rectangular cross-sectional shape of the hollow portion of the extruded profile,
A connecting rod for connecting the pair of weir plates at intervals;
A pair of partition plates attached in parallel with an interval to the outside of each pair of dam plates, having the same outer shape as each dam plate,
An inflatable balloon disposed in a radially expandable manner between the adjacent weir plate and the partition plate,
A hollow part sealing jig characterized by that. On the upper surface of each of the plurality of main girders laid in parallel on the pier, a step of standing a plurality of stud gibels at intervals along the longitudinal direction of the main girders;
In the extruded shape which comprises a floor slab and consists of an aluminum alloy, in the hollow part located just above the through-hole opened in the bottom wall of the said extruded shape material, It is any one of Claims 1 thru | or 6. The hollow portion sealing jig is inserted so that the pair of dam plates sandwich the through hole, and the packing is moved from the outer peripheral edge side of each dam plate to the inner wall side of the hollow portion, or the water expansion rubber A step of bringing water into contact with the water-stopping material or inflating the balloon so as to adhere to the inner wall of the hollow portion;
The extruded shape member in which the hollow portion sealing jig is inserted in the hollow portion in the vicinity of the through hole is made perpendicular to the upper direction of the plurality of main girders, and the stud dowel is connected to the pair of weir plates from the through hole. In a state of being inserted into a hollow portion sandwiched between, and placed through a mold,
Filling and curing the mortar so as to surround the stud gibber in a space sandwiched between the weir plates of the jig, and a space immediately below and surrounded by the mold,
including,
A floor slab installation method characterized by this. The floor slab is composed of a profile unit in which a plurality of the extruded profiles are joined along a direction orthogonal to the extrusion direction,
The hollow portion sealing jig is inserted in the vicinity of the through hole opened in the bottom wall of each extruded shape member, and the packing is moved from the outer peripheral side of each barrier plate to the inner wall side of the hollow portion, Alternatively, water in the mortar or water injected from the outside is brought into contact with the water-stopping material of the water expansion rubber, or the balloon is inflated so that the packing, the water-stopping material, or the balloon adheres to the inner wall of the hollow portion. Let
The method for installing a floor slab according to claim 7.

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