JP2018059313A - Steel floor slab unit with pavement attached and floor slab structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel floor slab unit with pavement attached and a floor slab structure which can contribute to further reducing traffic restrictions arising from floor slab replacement construction.SOLUTION: A steel floor slab unit with pavement attached comprises a deck plate 22, goose asphalt 30 laid over the whole area of the top face of the deck plate 22, and temporary pavement 32 laid over the whole area of the top face of the goose asphalt 30. A rod-like member 28 with threads cut in at least part of the outer peripheral surface is installed on at least one of both ends of the deck plate 22 in the bridge axial direction at the time of construction on a bridge, such that at least part of the outer peripheral surface with the threads cut therein protrudes further downwards than the bottom face of the deck plate 22.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a paving steel slab unit and a floor slab structure, and more particularly to a paved steel floor slab unit and a floor slab structure that can be suitably used for replacing an existing floor slab.

  The bridge floor slab is a member that directly supports the load of a vehicle or the like passing through the bridge, and many damage cases have been reported in recent years. For this reason, technological development for replacing bridge decks has become an important issue.

  When replacing bridge slabs, it is necessary to give due consideration to changes in the weight of the superstructure before and after replacement. As a floor slab to be installed after removing the damaged existing RC slab, the weight of the superstructure will be reduced. From this point of view, the adoption of steel slabs has become a powerful option. For example, Non-Patent Document 1 reports a floor slab replacement work in which an existing RC floor slab is removed and a new steel floor slab is newly installed.

  On the other hand, when replacing bridge slabs, it is required to suppress the influence on surrounding traffic as much as possible, and some routes are required to reduce daytime traffic restrictions as much as possible.

  On the other hand, in the floor slab replacement work reported in Non-Patent Document 2, the floor slab replacement work for the 2 lanes on the down line (27.1 m of bridge length) is being carried out, but only temporary closure at night ( From 20:00 to 6:00 the following day, the existing floor slabs of 2 lanes in the down line are removed and precast slabs for 2 lanes are installed. In the daytime, the floor slab replacement process is successfully completed in only five days while ensuring traffic release in one of the two lanes of the down line and one of the two lanes of the up line.

  However, the traffic regulation associated with the floor slab replacement work has never been as small as possible, and depending on the route, there may be a need to further reduce the traffic regulation in the floor slab replacement work.

Taketoshi Fujie, Takashi Honno, “Replacement of floor slab of Mikawa Bridge (Bridge after 40 years of service)”, 1st Hokuriku Bridge Conservation Conference, November 2013, p.357-362 Takeshi Mitsuda, 5 others, "Nishihan Expressway Miyuki Ohashi (down line) floor slab replacement phase II construction", Bridge and Foundation, Construction Book Co., Ltd., September 2011, p.15-20

  This invention is made in view of this point, Comprising: It aims at providing the steel floor slab unit with a pavement and floor slab structure which contribute to further reducing the traffic regulation accompanying floor slab replacement construction. .

  The present inventor examines each step of the floor slab replacement work described in Non-Patent Document 2 in detail, and whether there is a measure for further reducing traffic restrictions in the floor slab replacement work described in Non-Patent Document 2. Please do your best.

  As a result, the time required for the process of laying temporary pavement and the process of laying main pavement can be further reduced if the necessary technology can be developed, and it is judged that the traffic regulations can be further reduced. did.

  This invention is made | formed from this viewpoint, and solves the said subject with the following steel floor slab units and floor slab structures with a pavement.

  That is, the paved steel floor slab unit according to the present invention includes a deck plate, goose asphalt laid over the entire upper surface of the deck plate, and temporary pavement laid over the entire upper surface of the goose asphalt. At least one of the ends in the bridge axis direction of the deck plate when installed on the bridge is a rod-like member that is threaded on at least a part of the outer peripheral surface. The steel floor slab unit with a pavement is attached so that at least a part of the outer peripheral surface protrudes downward from the lower surface of the deck plate.

  Here, the temporary pavement is a pavement that is temporarily used before the main pavement, and is a pavement that is removed before laying the main pavement. Moreover, the main pavement is a main pavement that is not temporarily provided.

  The rod-shaped member is a bolt, the head of the rod-shaped member is disposed above the upper surface of the deck plate, and the at least a portion projecting downward from the lower surface of the deck plate is a nut. It may be configured such that it is fastened with and attached to the deck plate.

  The temporary pavement may be a pavement formed by applying a resin-based binding material as an adhesive to the upper surface of the goose asphalt and then spraying and bonding a hard aggregate.

  Further, the temporary pavement may be a steel plate having an inorganic zinc rich paint applied on the upper surface.

  The steel floor slab unit with paving may be further provided with a steel rail.

  The floor slab structure according to the present invention includes a plurality of the above-mentioned paved steel floor slab units arranged so as to be adjacent to each other in the bridge axis direction of the bridge, and the above-mentioned paved type arranged so as to be adjacent to each other in the bridge axis direction of the bridge. A connecting plate that connects the steel deck units, and a filling material that fills the gap between the paved steel deck units arranged so as to be adjacent to each other in the bridge axis direction of the bridge. The connecting plate has a plurality of through holes, and the paved steel floor slab unit is disposed adjacent to the plurality of through holes in the connecting plate in the bridge axis direction of the bridge. Each of the bar-shaped members is inserted, and the connecting plate is connected to the paved steel floor slab unit arranged so as to be adjacent to each other by bolting and connected to each other.

  In the floor slab structure, after removing the temporary paving and the interlining material at the same height level as the temporary paving, the goose asphalt and the upper surface of the interlining material at the same height level as the goose asphalt This pavement may be laid.

  The present invention can contribute to further reducing traffic restrictions associated with floor slab replacement work.

The perspective view which shows the whole pavement steel deck unit 10 concerning 1st Embodiment of this invention. The perspective view which expands and shows a part of the steel floor slab unit 10 with a pavement which concerns on 1st Embodiment of this invention. Vertical sectional view of paved steel deck unit 10 viewed from the direction perpendicular to the bridge axis Vertical sectional view of a paved steel floor slab unit 10 adjacent to the bridge axis direction (vertical sectional view of the floor slab structure 12 viewed from the direction perpendicular to the bridge axis) Enlarged view of part V in FIG. Vertical sectional view (vertical sectional view seen from the direction perpendicular to the bridge axis) schematically showing one process when the floor slab structure 12 used for temporary service is shifted to the floor slab structure 14 used for actual service Vertical sectional view of floor slab structure 14 used for actual service (vertical sectional view seen from the direction perpendicular to the bridge axis) Vertical sectional view seen from the bridge axis direction showing an enlarged connection part between the steel deck unit 20 of the paving steel deck unit 10 and the main girder 102 of the bridge Vertical cross-sectional view as viewed from the direction perpendicular to the bridge axis, showing an enlarged connection between the steel deck slab unit 20 of the paved steel deck unit 10 and the main girder 102 of the bridge (cross-sectional view taken along the line IX-IX in FIG. 8). The perspective view which expands and shows the edge part of the bridge axis direction of the steel deck unit 20 of the steel deck unit 10 with a pavement. The perspective view which shows the state in which the leading L-shaped connection member 110 was attached to the main girder 102 The perspective view which shows the retrofit L-shaped connection member 120 The state in which the steel floor slab unit 20 of the steel floor slab unit 10 with pavement is temporarily fixed to the main girder 102 via the leading L-shaped connecting member 110 is viewed obliquely from above and opposite to the leading L-shaped connecting member 110. Perspective view The state in which the steel floor slab unit 20 of the steel floor slab unit 10 with pavement is temporarily fixed to the main girder 102 via the leading L-shaped connecting member 110 is viewed obliquely from above the leading L-shaped connecting member 110 side. Perspective view The vertical ribs 24 of the steel deck slab unit 20 of the paved steel deck unit 10 are sandwiched by one plate-like part 112 of the leading L-shaped connecting member 110 and one plate-like part 122 of the trailing L-shaped connecting member 120. Is a perspective view showing a temporarily fixed state The perspective view which shows the state by which the steel floor slab unit 10 with a pavement was connected with the main girder 102. Vertical sectional view (vertical sectional view seen from the direction perpendicular to the bridge axis) of the paved steel deck unit 60 according to the second embodiment of the present invention Vertical sectional view of paved steel floor slab unit 60 adjacent to the bridge axis direction (vertical sectional view of floor slab structure 68 viewed from the direction perpendicular to the bridge axis) Vertical sectional view (vertical sectional view seen from the direction perpendicular to the bridge axis) of the paved steel deck unit 70 according to the third embodiment of the present invention Vertical sectional view of a paved steel floor slab unit 70 adjacent to the bridge axis direction (vertical sectional view of the floor slab structure 80 viewed from the direction perpendicular to the bridge axis) Enlarged view of XXI section in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing the entire paved steel floor slab unit 10 according to the first embodiment of the present invention, and FIG. 2 is a part of the paved steel floor slab unit 10 according to the first embodiment of the present invention. It is a perspective view which expands and shows. FIG. 3 is a vertical sectional view of the steel floor slab unit 10 with pavement as viewed from the direction perpendicular to the bridge axis. FIG. 4 is a vertical cross-sectional view of a paved steel floor slab unit 10 adjacent in the bridge axis direction (vertical cross-sectional view of the floor slab structure 12 viewed from the direction perpendicular to the bridge axis), and the paved steel floor adjacent in the bridge axis direction. The connection state of the plate unit 10 is shown. FIG. 5 is an enlarged view of a portion V in FIG. In FIG. 1 and FIG. 2, the description of the temporary pavement 32 provided on the upper surface of the goose asphalt 30 is omitted.

  As shown in FIGS. 3 and 4, the steel floor slab unit 10 with pavement is provided with a goose asphalt 30 that serves as a base layer for bridge pavement over the entire upper surface of the steel floor slab unit 20. A temporary pavement 32 is provided over the entire upper surface of the goose asphalt 30 by factory construction. The thickness of the goose asphalt 30 is about 50 mm, and the thickness of the temporary pavement 32 is about 30 mm.

  As shown in FIGS. 1 and 2, the steel floor slab unit 20 includes a deck plate 22, a plurality of vertical ribs 24, and two horizontal ribs 26. The rib 24 and the two lateral ribs 26 are connected by welding. In the state where the paved steel deck unit 10 is installed on the bridge, the longitudinal rib 24 has a longitudinal direction in the bridge axis direction, and the lateral rib 26 has a longitudinal direction in the bridge axis perpendicular direction. If the safety can be confirmed, the numbers of the vertical ribs 24 and the horizontal ribs 26 in the steel deck unit 20 may be changed as appropriate.

  The temporary pavement 32 is a pavement that is temporarily used for the period until its in-service, and performance required as pavement during the temporary use period (for example, surface slip resistance performance, rainwater permeability, flatness). The material is not particularly limited as long as the material can exhibit the above.

  Further, a connecting bolt 28 is provided at an end of the deck plate 22 of the steel deck unit 20 in the bridge axis direction (an end of the bridge in the bridge axis direction when the paved steel deck unit 10 is installed on the bridge). Is installed at the factory. The connecting bolt 28 is used when connecting the paved steel deck units 10 adjacent to each other in the bridge axis direction. When the paving steel deck unit 10 is manufactured at the factory, bolts 28 are provided at the ends in the bridge axis direction of the deck plate 22 of the steel deck unit 20 and then the top surface of the deck plate 22 of the steel deck unit 20 is provided. Lay goose asphalt 30 over the entire surface. The bolt 28 is inserted into a through hole 22A (see FIG. 5) provided at the end of the deck plate 22 in the bridge axis direction so that the head portion is above the upper surface of the deck plate 22, and the deck plate 22 It is fixed by a thin-walled nut 28A attached to the lower surface of 22 and has a function of a one-side bolt. The thin nut 28A is a thin nut having a thickness of about 4 mm. The bolt 28 attached to the steel floor slab unit 10 with a pavement is a rod-like member having a thread cut on at least a part of the outer peripheral surface, and at least a part of the part of the outer peripheral surface where the screw is cut. Protrudes downward from the lower surface of the deck plate 22, and the protruding portion is fastened and attached by a thin nut 28A.

  For the paved steel floor slab unit 10 in which the paved steel floor slab unit 10 is arranged on both sides in the bridge axis direction when installed on the bridge, connecting bolts 28 are provided at both ends in the bridge axis direction. In the case of the steel floor slab unit 10 with a pavement in which the steel floor slab unit 10 with a pavement is disposed only on one side in the bridge axis direction, a connecting bolt 28 may be provided only at the end on one side.

  Further, as shown in FIG. 1, one end portion of the paved steel deck unit 10 in the direction perpendicular to the bridge axis (one end portion of the bridge in the direction perpendicular to the bridge axis when the paved steel deck unit 10 is installed on the bridge). The steel wall height column 34 is provided at the factory construction.

  As described above, in the paved steel floor slab unit 10, the connecting bolt 28, goose asphalt 30, temporary pavement 32, and steel wall rail 34 are already provided at the factory construction. After installing the paved steel floor slab unit 10 at the position, it is not necessary to provide paving or wall railing at the site, and it is necessary at the site required from the start of the construction work of the paved steel floor slab unit 10 to the start of temporary use. The working time can be further shortened than before, and it is easy to proceed with the construction even with traffic restrictions only at night.

  Next, the connection between the paved steel deck units 10 that are installed on the bridge and are adjacent to each other in the bridge axis direction will be described.

  As shown in FIGS. 4 and 5, the steel floor slab units 20 of the paved steel floor slab unit 10 adjacent to each other in the bridge axis direction are fixed by thin-walled nuts 28 </ b> A that are already installed in factory construction. The through holes 38A of the connecting plate 38 are inserted into the connecting bolts 28 having a side bolt function, and are fixed by the nuts 28B, thereby connecting via the connecting plate 38. A filler plate 40 that is thicker than the thin nut 28 </ b> A is disposed between the lower surface of the deck plate 22 and the upper surface of the connecting plate 38. The filler plate 40 is provided with a through hole 40A (see FIG. 5), and the filler plate 40 is disposed on the lower surface of the deck plate 22 so that the thin nut 28A is positioned in the through hole 40A. The nut 28A can be prevented from interfering with the connecting plate 38.

  Further, a gap 42 of about 20 mm is provided between the paved steel floor slab units 10 adjacent in the bridge axis direction and between the paved steel floor slab unit 10 adjacent to the bridge axis direction and the existing RC floor slab 100. The gap 42 is filled with a filling material 44 to fill the gap 42. As the filling material 44, for example, a coating waterproof material can be used.

  By performing the above operations, the floor slab structure 12 using the steel floor slab unit with pavement 10 can be configured, and a temporary service can be started. The floor slab structure 12 is a floor slab structure used for provisional service.

  When shifting from the floor slab structure 12 used for temporary service to the floor slab structure 14 used for actual service, the temporary paving 32 and the temporary paving 32 of the steel floor slab unit 10 with paving as in the shaving part 36 shown in FIG. As shown in FIG. 7, the pavement 46 is laid over the entire upper surface of the goose asphalt 30 and the goose asphalt 30 at the same height level as shown in FIG. The floor slab structure 14 is constructed. The goose asphalt 30 and the filling material 44 at the same height level as the goose asphalt 30 are not scraped off, and are continuously used in the floor slab structure 14 used for actual use.

  Therefore, the floor slab structure 12 configured using the paved steel floor slab unit 10 according to the first embodiment can omit the work of laying the base layer when performing the main paving, and only lays the surface layer. Since the work of the main pavement can be completed, it is possible to shorten the time for traffic restriction when shifting from temporary service to actual service.

  Next, a connection structure between the paved steel deck unit 10 and the bridge main girder 102 will be described. In addition, the connection structure demonstrated here is an example, and connection structures other than the connection structure demonstrated here can also be used suitably.

  FIG. 8 is a vertical cross-sectional view as seen from the bridge axis direction showing an enlarged connection portion between the steel deck slab unit 20 of the paved steel deck unit 10 and the main girder 102 of the bridge, and FIG. It is the vertical sectional view (IX-IX line sectional view of Drawing 8) seen from the bridge axis perpendicular direction which expands and shows the connection part of steel deck unit 20 of steel deck unit 10 and the main girder 102 of a bridge, FIG. 10 is an enlarged perspective view showing an end portion of the steel deck unit 20 in the bridge axis direction. In addition, in FIGS. 8-10, description of the goose asphalt 30 and the temporary pavement 32 is abbreviate | omitted. In FIG. 9, the description of the temporary fixing bolt 117 and the bolt 118 shown in FIG. 16 and the like is omitted.

  Of the plurality of vertical ribs 24 of the steel floor slab unit 20, the vertical ribs 24 arranged above the main beam 102 are provided with two L-shaped connecting members (advanced L-shaped connecting members) on both sides as shown in FIG. The member 110 and the rear L-shaped connecting member 120) are sandwiched between the respective plate-like portions 112 and 122, and are connected and fixed by bolts 118 and nuts 118A.

  The leading L-shaped connecting member 110 is made of steel and includes two plate-like portions (one plate-like portion 112 and the other plate-like portion 114). It can be used as the L-shaped connecting member 110. Further, the retrofit L-shaped connecting member 120 is made of steel and includes two plate-like portions (one plate-like portion 122 and the other plate-like portion 124). It can be used as a retrofit L-shaped connecting member 120.

  Among the plurality of vertical ribs 24 of the steel floor slab unit 20, the vertical ribs 24 arranged above the main beam 102 are separated by two long holes 24A (see FIG. 9 and FIG. 10) is provided, and one long hole 24A is provided in the vicinity of both ends of the longitudinal rib 24 in the longitudinal direction. The long hole 24A is longer in the vertical direction than the horizontal direction, and even if the position of the paved steel deck unit 10 is slightly shifted in the vertical direction, the paved steel deck unit 10 is temporarily fixed to the main girder 102. In this case, the vertical displacement can be absorbed by the long hole 24A.

  The position where the long hole 24A is provided is not necessarily near the both ends in the longitudinal direction of the vertical rib 24, and the two long holes 24A are not less than a predetermined distance in the longitudinal direction of the vertical rib 24 (paved steel floor slab). It suffices that the unit 10 be separated by a sufficient distance to stably temporarily fix the unit 10 to the main beam 102. Further, the number of the long holes 24A is not limited to two, and may be three or more.

  FIG. 11 is a perspective view showing a state in which the leading L-shaped connecting member 110 is attached to the main beam 102, and FIG. 12 is a perspective view showing the trailing L-shaped connecting member 120.

  As shown in FIG. 11, the leading L-shaped connecting member 110, which is one of the two L-shaped connecting members sandwiching the vertical rib 24 disposed above the main beam 102, has two elongated holes in the vertical rib 24. One plate-like portion 112 is provided with two circular temporary fixing through holes 112A each corresponding to the position of 24A.

  Also, as shown in FIG. 12, the retrofitted L-shaped connecting member 120, which is the other of the two L-shaped connecting members sandwiching the vertical ribs 24 disposed above the main beam 102, has two vertical ribs 24. One plate-like portion 122 is provided with two circular large-diameter through holes 122A corresponding to the positions of the long holes 24A.

  The diameter of the circular temporary fixing through hole 112A provided in the leading L-shaped connecting member 110 is larger than the diameter of the circular large diameter through hole 122A provided in the retrofit L-shaped connecting member 120. It is small and the shaft portion of the temporary fixing bolt 117 can be inserted, but the head portion of the temporary fixing bolt 117 and the temporary fixing nut 117A cannot be inserted. The diameter of the large-diameter through-hole 122A is such that the head of the temporary fixing bolt 117 and the temporary fixing nut 117A can be inserted therethrough.

  Further, the two long holes 24A of the vertical ribs 24 are provided by factory construction before carrying in the field, and the two circular temporary fixing through holes 112A of the leading L-shaped connecting member 110 are constructed by factory construction before carrying in the field. Further, the two circular large-diameter through-holes 122A of the L-shaped connecting member 120 are provided by factory construction before being brought into the field.

  Next, although the procedure for connecting the steel floor slab unit 10 with pavement to the main girder 102 will be described, in FIGS. 14 and 16 used for the description, the description of the goose asphalt 30 and the temporary pavement 32 is omitted.

  As shown in FIG. 11, first, the leading L-shaped connecting member 110 is attached to the upper flange 102 </ b> A of the main beam 102. Specifically, the other plate-like portion 114 of the leading L-shaped connecting member 110 is attached to the upper flange 102A of the main girder 102 with a bolt 116 and a nut 116A (see FIGS. 8 and 9). The state shown in FIG. 11 is a state before the paved steel slab unit 10 is still attached to the main girder 102, and only the leading L-shaped connecting member 110 is mounted on the main girder 102 by the bolt 116 and the nut 116A. It is in a state attached to the flange 102A.

  Next, FIG. 13 (a state in which the paved steel floor slab unit 10 is temporarily fixed to the main girder 102 via the leading L-shaped connecting member 110 from an obliquely upper side opposite to the leading L-shaped connecting member 110. FIG. 14 and a state in which the paved steel floor slab unit 10 is temporarily fixed to the main girder 102 via the leading L-shaped connecting member 110 obliquely above the leading L-shaped connecting member 110 side. As shown in FIG. 2, the two vertical ribs 24 of the steel floor slab unit 20 are positioned at the positions of the two temporary fixing through holes 112 </ b> A of the one plate-like portion 112 of the leading L-shaped connecting member 110. While aligning the position of the long hole 24A and appropriately adjusting the height position of the paved steel deck unit 10, the temporary fixing bolts 117 are inserted into the two temporary fixing through holes 112A and the long holes 24A, respectively. And tighten each with the nut 117A. . Thereby, the steel floor slab unit 10 with pavement is temporarily fixed to the main girder 102 via the leading L-shaped connecting member 110.

  Next, the positions of the two large-diameter through holes 122A of the one plate-like portion 122 of the retrofit L-shaped connecting member 120 are respectively aligned with the positions of the two temporary fixing bolts 117 and nuts 117A. The connecting member 120 is disposed so that the shaft portion of the temporary fixing bolt 117 and the nut 117A are disposed in the large-diameter through hole 122A as shown in FIG. Then, the other plate-like portion 124 of the retrofit L-shaped connecting member 120 is fastened to the upper flange 102A of the main girder 102 with a bolt 116 and a nut 116A as shown in FIG. The other plate-like portion 124 of the retrofit L-shaped connecting member 120 and the upper flange 102A of the main girder 102 are provided with through holes (not shown) through which the shaft portions of the bolts 116 can be inserted. By fixing the bolt 116 with the nut 116 </ b> A, the other plate-like portion 124 of the retrofit L-shaped connecting member 120 is connected and fixed to the upper surface of the upper flange 102 </ b> A of the main girder 102. In FIG. 15, the portion of the bolt 116 that is hidden by the upper flange 102 </ b> A of the main girder 102 and the other plate-like portion 124 of the retrofit L-shaped connecting member 120 and cannot be seen is also drawn with a solid line.

  The vertical ribs 24 of the steel deck unit 20 are sandwiched and temporarily fixed by one plate-like portion 112 of the leading L-shaped connecting member 110 and one plate-like portion 122 of the post-attaching L-shaped connecting member 120 in FIG. In the state, the one plate-like portion 112 of the leading L-shaped connecting member 110, the vertical rib 24 of the steel deck unit 20, and the one plate-like portion 122 of the post-attaching L-shaped connecting member 120 are arranged in the longitudinal direction (bridge axis). In the direction), a hole is drilled at a position at a predetermined interval, and a through hole for bolting is provided. The shaft portion of the bolt 118 is inserted into the provided through-hole, and one plate-like portion 112 of the leading L-shaped connecting member 110 and the vertical rib of the steel floor slab unit 20 are inserted by the bolt 118 and the nut 118A (see FIG. 8). 24 and one plate-like part 122 of the L-shaped connecting member 120 attached to the back are bolted together. Accordingly, as shown in FIG. 16, the vertical ribs 24 of the steel deck slab unit 20 are formed by one plate-like portion 112 of the leading L-shaped connecting member 110 and one plate-like portion 122 of the retrofitting L-shaped connecting member 120. The steel floor slab unit 10 with pavement is fixed while being sandwiched, and is connected to the main girder 102.

  As described above, in FIG. 9, the description of the temporary fixing bolt 117 and the bolt 118 is omitted, but the through-hole 112B shown in FIG. It is a through-hole provided in one plate-shaped part 112 of this. The illustration of the through holes provided in the plate-like portion 122 of the vertical rib 24 of the steel floor slab unit 20 and the retrofitted L-shaped connecting member 120 after being drilled in the field is omitted.

  In the temporarily fixed state shown in FIG. 15, drilling is performed in the field, and the through hole through which the shaft portion of the bolt 118 is inserted is formed as one plate-like portion 112 of the leading L-shaped connecting member 110 and the vertical rib of the steel deck unit 20. 24 and one plate-like portion 122 of the retrofit L-shaped connecting member 120, the positions of the through holes provided in these members are exactly the same. For this reason, connection fixation of the steel floor slab unit 10 with a pavement and the main girder 102 can be implement | achieved, hardly making a position shift.

  As described above, both sides of the vertical rib 24 arranged above the main beam 102 are connected to one plate-like portion 112 of the leading L-shaped connecting member 110 and one plate-like portion 122 of the trailing L-shaped connecting member 120. As shown in FIG. 16, the paved steel deck slab unit 10 is connected to the main girder 102.

  Further, the members used when connecting the paved steel floor slab unit 10 to the upper flange 102A of the main girder 102 are a leading L-shaped connecting member 110, a retrofit L-shaped connecting member 120, bolts 116 and 118, and temporary fixing. A bolt 117 and nuts 116A, 117A, and 118A, both of which are made of steel.

  In addition, the site | part arrange | positioned on the upper surface of the upper flange 102A of the main girder 102 among the site | parts of the existing RC floor slab 100 of the object replaced with the pavement steel floor slab unit 10 which concerns on this 1st Embodiment is a stud gibber. Since the upper girder 102 is fixedly connected to the upper flange 102A of the main girder 102 with a stopper such as an anchor bar or the like, it is necessary before performing the work of connecting the paved steel deck unit 10 to the upper flange 102A of the main girder 102. Accordingly, the concrete arranged on the upper surface of the upper flange 102A of the main girder 102 is removed using a concrete breaker or the like. Further, the stud gibber and anchor bars remaining on the upper surface of the upper flange 102A are prevented from slipping with a gas cutter or the like, and before the paved steel deck unit 10 is connected to the upper flange 102A of the main girder 102, The upper surface of the upper flange 102A of the beam 102 is made flat.

(Second Embodiment)
FIG. 17 is a vertical cross-sectional view (vertical cross-sectional view seen from the direction perpendicular to the bridge axis) of a paved steel slab unit 60 according to the second embodiment of the present invention. FIG. 18 is a vertical sectional view of a paved steel floor slab unit 60 adjacent in the bridge axis direction (vertical sectional view of the floor slab structure 68 viewed from the direction perpendicular to the bridge axis), and the paved steel floor adjacent in the bridge axis direction. The connection state of the plate unit 60 is shown. In addition, about the structure similar to the steel floor slab unit 10 with a pavement which concerns on 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The steel floor slab unit 60 with a pavement according to the second embodiment is an embodiment in which the temporary pavement 32 of the steel floor slab unit 10 with a pavement according to the first embodiment is limited to a pavement 62 formed by a neat method. The pavement 62 can be formed by applying a resin-based binding material as an adhesive on the upper surface of the goose asphalt 30 and then spraying and bonding the hard aggregate.

  The steel floor slab units 20 of the paved steel floor slab unit 60 adjacent to each other in the bridge axis direction pass through the connecting plate 38 to the connecting bolts 28 already installed in the factory construction, as in the first embodiment. The holes 38A are inserted and fixed by the nuts 28B, so that the holes 38A are connected via the connecting plate 38.

  Between the steel floor slab units 60 adjacent to each other in the bridge axis direction and between the steel floor slab unit 60 adjacent to the bridge axis direction and the existing RC floor slab 100, an interval 64 of about 20 mm is provided. However, the interval 64 is filled with a filling material 66 to fill the interval 64. As the filling material 66, for example, a coating-type waterproof material can be used.

  By performing the above work, the floor slab structure 68 using the steel floor slab unit 60 with a pavement can be configured, and a temporary service can be started. The floor slab structure 68 is a floor slab structure used for temporary provision.

  When shifting from provisional service to actual service, the same treatment as that described in the first embodiment is performed.

(Third embodiment)
FIG. 19 is a vertical cross-sectional view (vertical cross-sectional view seen from the direction perpendicular to the bridge axis) of a paved steel slab unit 70 according to the third embodiment of the present invention. FIG. 20 is a vertical sectional view of a paved steel floor slab unit 70 adjacent in the bridge axis direction (vertical sectional view of the floor slab structure 80 viewed from the direction perpendicular to the bridge axis), and the paved steel floor adjacent in the bridge axis direction. The connection state of the plate unit 70 is shown. FIG. 21 is an enlarged view of the XXI portion of FIG. In addition, about the structure similar to the steel floor slab unit 10 with a pavement which concerns on 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The steel floor slab unit with paving 70 according to the third embodiment is an embodiment in which the temporary paving 32 of the steel floor slab unit with paving 10 according to the first embodiment is limited to a steel plate 72. The steel plate 72 is coated with an inorganic zinc rich paint on the upper surface, ensuring the slip resistance performance of the surface required for pavement.

  Moreover, in order to ensure the connection performance between the steel plate 72 and the goose asphalt 30, as shown in FIGS. 19 to 21, the steel plate 72, the goose asphalt 30 and the deck plate 22 of the steel floor slab unit 20 are inserted through the bolts. Temporary fixing bolts 74 to be joined are provided at predetermined intervals.

  As shown in FIG. 21 (enlarged view of the XXI portion in FIG. 19), a concave portion 72A is provided in the portion of the steel plate 72 at the position where the temporary fixing bolt 74 is disposed, and the head portion 74A of the temporary fixing bolt 74 is provided. Is accommodated in the recess 72A.

  The temporary fixing bolts 74 are fastened and fixed by nuts 74B arranged below the deck plate 22 of the steel deck unit 20.

  The steel floor slab units 20 of the paved steel floor slab unit 70 adjacent to each other in the bridge axis direction pass through the connecting plate 38 to the connecting bolts 28 already installed in the factory construction, as in the first embodiment. The holes 38A are inserted and fixed by the nuts 28B, so that the holes 38A are connected via the connecting plate 38.

  An interval 76 of about 20 mm is provided between the paved steel floor slab units 70 adjacent to each other in the bridge axis direction and between the paved steel floor slab unit 70 adjacent to the bridge axis direction and the existing RC floor slab 100. However, the interval 76 is filled with a filling material 78 to fill the interval 76. As the filling material 78, for example, a coating waterproof material can be used.

  By performing the above operations, the floor slab structure 80 using the steel floor slab unit with pavement 70 can be configured, and a temporary service can be started. The floor slab structure 80 is a floor slab structure used for provisional service.

  When shifting from the temporary service to the actual service, the same process as the process described in the first embodiment (the process of laying the main pavement 46 after removing the steel plate 72 which is the temporary pavement) is performed. In the machine configuration, it is necessary to remove the temporary fixing bolt 74 when removing the steel plate 72, and the point that a through hole is generated after the steel plate 72 and the temporary fixing bolt 74 are removed is different from the first embodiment. The through holes generated after removing the steel plate 72 and the temporary fixing bolts 74 are filled with goose asphalt (the same goose asphalt as the goose asphalt 30) to the same height as the upper surface of the goose asphalt 30. After that, the main pavement 46 is laid over the entire upper surface of the goose asphalt 30 to form a floor slab structure used for actual use.

10, 60, 70 ... Steel floor slab unit with paving 12, 14, 68, 80 ... Floor slab structure 20 ... Steel floor slab unit 22 ... Deck plate 22A, 38A, 40A ... Through hole 24 ... Vertical rib 24A ... Long hole 26 ... Lateral rib 28 ... Bolt 28A ... Thin nut 28B ... Nut 30 ... Goose asphalt 32 ... Temporary pavement 34 ... Steel wall rail 36 ... Scraping part 38 ... Connecting plate 40 ... Filler plate 42, 64, 76 ... Spacing 44, 66, 78 ... Filling material 46 ... Main pavement 62 ... Pavement formed by neat method 72 ... Steel plate 72A ... Recess 74 ... Temporary fixing bolt 74A ... Head 74B ... Nut 100 ... Existing RC floor slab 102 ... Main girder 102A ... Upper flange 110 ... L-shaped connecting member 112 ... One plate-like part 112A ... Temporary fixing through-hole 112B ... Through-hole 114 ... Other plate-like part 11 6, 118 ... Bolts 116A, 117A, 118A ... Nuts 117 ... Temporary fixing bolts 120 ... Retrofit L-shaped connecting member 122 ... One plate-like portion 122A ... Large diameter through-hole 124 ... Other plate-like portion

Claims (7)

Deck plate,
Goose asphalt laid across the entire top surface of the deck plate;
Temporary paving laid over the entire upper surface of the goose asphalt;
With
At least one of the ends in the bridge axis direction of the deck plate when erected on the bridge is a rod-like member threaded on at least a part of the outer peripheral surface. A paved steel slab unit, wherein at least a part of the outer peripheral surface portion is attached to protrude downward from the lower surface of the deck plate.   The rod-shaped member is a bolt, and is arranged so that the head thereof is above the upper surface of the deck plate, and the at least part of the portion protruding below the lower surface of the deck plate is a nut. The steel floor slab unit with pavement according to claim 1, wherein the steel floor slab unit is paved and attached to the deck plate.   The said temporary pavement is a pavement formed by applying a resin-based binding material as an adhesive on the upper surface of the goose asphalt and then spraying and bonding hard aggregate. Steel floor slab unit with paving.   The steel floor slab unit with a pavement according to claim 1 or 2, wherein the temporary pavement is a steel plate with an inorganic zinc rich paint applied on an upper surface.   A steel floor slab unit with a pavement according to any one of claims 1 to 4, wherein a steel rail is provided. A plurality of steel floor slab units with pavement according to any one of claims 1 to 5 arranged so as to be adjacent to each other in the bridge axis direction of the bridge,
A connecting plate that connects the paved steel deck units arranged adjacent to each other in the bridge axis direction of the bridge;
A filling material that fills the gap between the paved steel deck units arranged so as to be adjacent to each other in the bridge axis direction of the bridge, and fills the gap;
With
The connecting plate has a plurality of through-holes, and the bar-shaped member of the paved steel floor slab unit is disposed in the plurality of through-holes of the connecting plate so as to be adjacent to each other in the bridge axis direction of the bridge. Are respectively inserted, and the connecting plate is bolted and connected to the paved steel floor slab unit arranged so as to be adjacent to each other.   The floor slab structure according to claim 6, wherein the goose asphalt and the goose asphalt are at the same height level after removing the temporary pavement and the filling material at the same height level as the temporary pavement. A floor slab structure in which the main pavement is laid on the upper surface of the stuffing material.