JP2010285811A - Form for cantilever beam floor plate and structural body of cantilever beam floor plate composed of the form for cantilever beam floor plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form for cantilever beam floor plate capable of facilitating its transport and construction, dispensing with timbering, shortening construction term, reducing cost of construction and its weight, and achieving high rigidity, earthquake resistance, and durability. <P>SOLUTION: This form 106 for cantilever beam floor plate is composed of a hard lower part form body covering an extension line 6 and an end edge part 7 of a rear surface part 5 opposing to a plane part 2 of a bridge girder 1 and a plurality of main support members 10 arranged in parallel in a space part 9 surrounded by the hard lower part form body. The main support member 10 has a wall part 11 formed substantially vertically and a fixed base part 12 bent substantially at right angle for the wall part 11 from a lower end edge part of the wall part 11. An engagement fixing means 14 being engageable with an engaging member 123 provided in the plane part 2 of the bridge girder 1 is arranged in at least a part of the fixed base part 12. Multiple opening parts 15 are formed in at least a part of the lower end edge part of the wall part 11 of the main support member 10, and a part of the wall part 11 and a part of the hard lower part mold body are mutually connected and fixed through suspension fittings 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cantilever floor plate formwork used for a cantilever structure in a bridge composed of a bridge girder and a floor slab structure, and further to the cantilever floor plate. The present invention relates to a lower cantilever type composite floor board structure using a formwork.

  In recent years, as a bridge used on roads, rivers, valleys, etc., generally used in roads, railroads or sidewalks, it is stretched between concrete bridge girders and the bridge girder. A structure composed of a synthetic floor board is becoming common.

  Here, a general floor slab is made into a mold while supporting a plywood veneer with a temporary material called a support, and after assembling reinforcing bars inside it, concrete is poured into it, and after drying and curing, the mold is disassembled and completed. There are the most construction methods, and there are other so-called synthetic floorboards.

  The composite floor board is a kind of prefabricated floor board structure, and is constructed by combining steel plate material with concrete using a thick steel plate.

  With reference to FIG. 10, the structure of the conventional floor board and the outline of the construction method will be described.

  That is, as understood from FIG. 10, in the conventional floor board, the upper reinforcing bar 41 and the lower reinforcing bar 42 are arranged in parallel vertically, and a plurality of distributing bars 43, 44 are inserted in a direction perpendicular to the upper reinforcing bar 41 and the lower reinforcing bar 42. In addition, support steel wires are arranged in a direction perpendicular to the direction in which the reinforcing bars are arranged, and all of their intersections are welded or tied together using metal wires to form a three-dimensional structure, and concrete is injected into this to form a floor board Since the operation is performed between the plurality of bridge girders, as shown in FIG. 10, a support that becomes a work platform for workers in the vicinity of the bridge girders and in the vicinity of the end bridge girders. It is necessary to install a work, and it is also necessary to disassemble the support after the concrete is poured into the floorboard and the concrete is hardened.

  In such a conventional method, the cost is increased and the construction period is extended, so that the economic burden is large. Furthermore, there are many human accidents in the work of dismantling the support work, and improvement has been required. As a method for solving the above-described conventional problems, a synthetic floor board as illustrated in FIG. 11 has been developed.

  For example, as disclosed in Japanese Patent Application Laid-Open No. 2007-169931 (Patent Document 1), the synthetic floor board includes upper and lower reinforcing bars 46 and 47 and a distribution bar 50 as shown in FIG. Three-dimensionally arranged on the intersection, the upper and lower reinforcing bars 46 and 47 are fixed to each other with an appropriate crimping fitting 51, and the crimping fitting 51 is connected to the lower side made of metal or plastic via an appropriate connector 49. The composite floor board having the structure as described above is fixed to the bottom surface of the formwork plate 55, manufactured in the factory, brought into the construction site, and stretched between the bridge girders. The construction period is shortened, and the construction and dismantling work of the support work 53 is not required, so that the cost can be reduced and the danger has been greatly improved.

  However, as shown in FIG. 12, at both ends of the passage provided by the bridge, only one outermost bridge girder or bridge girder is out of the plurality of bridge girders arranged in the width direction of the passage. If there is no narrow passage, a floor plate structure having a cantilever structure is inevitably formed on both sides of the bridge girder. Therefore, it is still necessary to use the support work 53 when working on the portion. The above-mentioned problems still remain.

JP 2007-169931 A

  Accordingly, an object of the present invention is to improve the above-mentioned deficiencies of the prior art and to form a cantilever structure having a cantilever structure that forms both ends of a passage portion provided by a bridge. As a floorboard formwork, transportation and construction work are easy, no support construction and dismantling work is required, construction period is short, production and construction costs are low, light weight, great rigidity and earthquake resistance, and even higher The present invention provides a cantilever floor board form having durability and a floor board structure having a cantilever structure that exhibits the same operational effects.

  In order to achieve the above-described object, the present invention adopts a basic technical configuration as described below.

  That is, as a first aspect of the present invention, a cantilever beam structure formed at at least one end in the width direction of a passage formed by a bridge composed of a bridge girder and a floorboard structure. A cantilever floor plate formwork used for a floorboard structure having a long axis of the leg portion, which is formed at an upper end portion of a leg portion of the bridge girder. And extending from the end in the passage width direction of at least one of the support heads having a function of supporting the floor plate structure, and having an upper flat portion formed on a surface substantially orthogonal to the A rigid lower mold body set so as to cover the virtual extension line of the back surface portion facing the flat portion of the bridge girder portion and its end edge portion, contact with at least a part of the flat portion of the bridge girder portion; And each of the rigid lower formwork parts is extended in the space surrounding the part. The main support member is composed of a plurality of elongated main support members arranged in parallel, and the main support member includes a wall portion formed substantially perpendicular to the planar portion of the bridge girder portion and the At least one of the first fixed substrate portions facing the flat surface portion of the bridge girder portion of the fixed substrate portion. At the same time, an engaging and fixing means capable of engaging and fixing with an engaging member provided on the flat surface portion of the bridge girder is disposed at the same time, and at the same time, by the rigid lower mold body in the main support member A plurality of openings are perforated in at least a part of the lower edge of the wall part existing in the formed space part, and at least a part of the wall part existing in the space part And at least a part of the rigid lower mold part is appropriately suspended Is a cantilever floor plate formwork that is connected and fixed via a wall, and as a second aspect according to the present invention, concrete is poured into the cantilever floor plate formwork having the above-described configuration. This is a cantilever floor slab structure.

  Since the cantilever floor formwork in the present invention adopts the above-described technical configuration, it is particularly easy to transport and construct, the construction period is short, the production and construction costs are low, and It is lightweight, has great rigidity and earthquake resistance, and can easily obtain a floor plate with higher durability, and has a cantilever structure using the cantilever floor plate formwork, and has the same operation as above. A floorboard structure capable of exhibiting the effect can be easily obtained.

FIG. 1 is a side view showing the configuration of a specific example of the cantilever floor mold according to the present invention. FIG. 2 is a perspective view showing the configuration of a specific example of the cantilever floor mold according to the present invention. FIG. 3 is a cross-sectional view showing the configuration of a specific example of a bridge using the cantilever floor board form of the present invention. FIG. 4 is a plan view showing the configuration of a specific example of the cantilever floor board form of the present invention. FIG. 5 is a plan view showing a specific example when the cantilever floor board formwork of the present invention which is blocked is mounted on a bridge girder. FIG. 6 is a cross-sectional view showing a structure of a specific example of a cross-sectional shape of the main support member in the cantilever floor plate of the present invention, and a cross-section showing an example of a joined state between the main support member and the hanging bracket. FIG. FIG. 7 is a cross-sectional view showing the structure of a specific example when a retaining wall is provided in the cantilever floor mold according to the present invention. FIG. 8 is a side view showing an example of a retaining wall used in the present invention. FIG. 9 is a diagram showing a specific example of the structure of the main support member of the present invention. FIG. 10 is a cross-sectional view showing the configuration of a specific example of a conventional bridge construction method. FIG. 11 is a perspective view illustrating the configuration of a specific example of a synthetic floor board that has been conventionally used. FIG. 12 is a cross-sectional view showing a configuration of a specific example of a conventional erection state of a support.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of a cantilever floor board mold and a cantilever floor board structure using the same according to the present invention will be described in detail with reference to the drawings.

  That is, FIG. 1 is a side view showing an example of the configuration of the floor board form 5 according to the present invention, and FIG. 2 is a perspective view thereof.

  That is, in the same figure, it has a cantilever structure formed in at least one end 4 in the width direction 104 of the passage 103 formed by the bridge 102 composed of the bridge girder 1 and the floorboard structure 100. The cantilever floor plate formwork 106 used in the floorboard structure 100, the cantilever floor plate formwork 106 being formed at the upper end of the leg portion of the bridge girder 1. The passage width direction end 4 of at least one of the support head 3 having the upper flat portion 3 formed on the surface 2 substantially orthogonal to the major axis P of the plate and having the function of supporting the floor plate structure 100. The rigid lower mold body 8 is set so as to cover the virtual extension line 6 of the back surface portion 5 facing the flat surface portion 2 of the bridge girder and the edge portion 7 thereof. And at least a part of the plane part 2 of the bridge girder part 1 and The main lower support member 10 is composed of a plurality of long main support members 10 arranged in parallel with each other and extended in a space 9 surrounding the rigid lower mold body 8. Are a wall portion 11 formed substantially perpendicular to the flat surface portion 2 of the bridge girder portion 1 and a fixed substrate portion bent at a substantially right angle from the lower end edge of the wall portion 11 with respect to the wall portion 11. 12 and an engagement provided on the flat surface portion 2 of the bridge girder portion 1 on at least a part of the first fixed substrate portion 122 facing the flat surface portion 2 of the bridge girder portion 1 of the fixed substrate portion 12. The engagement fixing means 14 that can be engaged and fixed with the member 123 is disposed, and at the same time, in the space portion 9 formed by the rigid lower mold body portion 8 in the main support member 10. A plurality of openings in at least a part of the lower edge of the wall 11 5 is perforated, and at least a part of the wall part 11 existing in the space 9 and at least a part of the rigid lower mold body part 6 form an appropriate hanging bracket 16. The cantilever floor plate form 106 is shown connected and fixed through.

  As a specific example of the cantilever floor plate form 106 in the present invention, as shown in FIG. 3, for example, four bridge girders 1 are arranged adjacent to each other at an appropriate interval, and the adjacent A bridge plate made of a passage portion 103 having a predetermined width is formed by stretching a floor plate structure 100 called a synthetic floor plate (also referred to as a PC floor plate) between the bridge girders 1 and 1, and the passage portion. The cantilever floor board structure 105 with built-in concrete, which is constructed by incorporating the cantilever floor board formwork 106, is arranged on both outer sides in the width direction of the passage section 103 of the bridge at both ends constituting the 103. It is what has been.

  In this specific example, four bridge girders 1 are arranged adjacent to each other with the distance between the central axes P set at 3.8 m, and a passage 103 having a width of 14.4 m is formed thereon. A support head 3 having a width of 1.3 m is formed at the upper end of each bridge girder 1 including the support portion 200 that supports the floor board structure 105.

  And between the support parts 200 of the bridge girder 1 adjacent to each other, a floor plate formwork or floor plate structure 100 having an appropriate configuration is stretched to form a passage surface, The cantilever floor formwork 106 according to the present invention is formed on the outer side of the bridge girder 1 positioned at both ends of the plurality of adjacently arranged bridge girder 1 as viewed in the passage width direction 104. Is formed.

  In the present invention, the length of the bridge girder 1 in the direction of the passage is not particularly limited.

  Next, a specific configuration example of the cantilever floor mold 106 according to the present invention will be described with reference to FIGS. 1 to 3. That is, the rigid lower formwork in the cantilever floor formwork 106 extended outward from at least one of the passage width direction ends 4 of the bridge girder 1 positioned at the end of the passage width. The body 8 has a shape that is set so as to cover the virtual extension line 6 of the back surface portion 5 and the end edge portion 7 facing the flat surface portion 2 of the bridge girder 1 portion. The portion of the support head 3 that comes into contact with the outer end 4 has an appropriate refracting portion 203 and is joined to the outer end 5 of the support head 3 by an appropriate joining means 201 such as a bolt nut. Yes.

  Further, the outermost portion 71 of the rigid lower mold body 8 is provided with a side wall portion 7 erected in a substantially vertical direction, and the height of the upper edge portion of the side wall portion 7 is determined by the cantilever. It is also desirable to match the height of the upper surface when the concrete is poured into the floor board form 106. The cantilever floor plate form 106 used in the present invention is mixed with metal materials including iron, aluminum, stainless steel, etc., steel materials, high-functional resins called engineering plastics, carbon fibers, and the like. It is composed of at least one material selected from the group consisting of composite materials including high-strength resins, plastic materials, and ceramic materials. Further, the side surface in the passage direction side of the cantilever floor plate mold 106 according to the present invention is different from the cantilever floor plate mold 106 that is separately configured except when used in a specific part. Open for connection.

  Furthermore, the inclined shape of the bottom surface portion 55 of the rigid lower mold body 8 of the cantilever floor board mold 106 according to the present invention is not particularly limited. This is determined in consideration of the length in the passage width direction and the height of the outer end 4 of the support head 3 of the bridge girder 1. Further, an appropriate stepped portion 56 can be provided between the bottom surface portion 55 and the side wall portion 7 in the rigid lower mold body 8.

  On the other hand, the main support member 10 used in the cantilever floor plate form 106 according to the present invention is in contact with at least a part of the flat portion 2 formed on the support head 3 of the bridge girder 1. Each of the plurality of long main support members 10 is arranged in parallel with each other and is extended in a space 9 surrounding the rigid lower mold body 8. Selected from the group consisting of metal materials including iron, aluminum and stainless steel, steel materials, high-performance resins called engineering plastics, composite materials including high-strength resins mixed with carbon fibers, plastic materials and ceramic materials Further, at least the main support member 10 is formed in a substantially vertical shape with respect to the flat surface portion 2 formed on the support head portion 3 of the bridge girder portion 1. Was Part 11 and a fixed substrate part 12 bent at a substantially right angle with respect to the wall part 11 from the lower edge of the wall part 11, and a part of the fixed substrate part 12 is the plane of the bridge girder part 1. It is configured to be in direct contact with the part 2 and fixed to the flat part 2 via appropriate engaging means 123.

  In the present invention, a portion of the main support member 10 that directly contacts the flat surface portion 2 of the bridge girder portion 1 is referred to as a first fixed substrate portion 122. Then, at least a part of the first fixed substrate portion 122 is engaged with an engaging member 123 provided on the flat surface portion 2 of the bridge girder portion 1, for example, an anchor bolt, and can be engaged and fixed, for example, a bolt. An insertion hole is arranged. On the other hand, the first fixed substrate portion 122 in the main support member 10 is disposed outside the space portion 9 formed by the hard lower mold body portion 8 described above.

  On the other hand, the remaining portion of the main support member 10 has the same cross-sectional shape as described above, and is disposed in the space portion 9 formed by the rigid lower mold body portion 8. In some cases, the main support member 10 disposed in the space portion 9 may be one in which the fixed substrate portion 12 is at least partially omitted as shown in FIG. Further, a plurality of openings 15 are perforated in at least a part of the lower edge of the wall 11 of the main support member 10 disposed in the space 9 according to the present invention.

  The opening 15 has a function of improving the fluidity of the concrete during the pouring of the concrete while reducing the weight. The shape and the number of installed openings 15 are not particularly limited, but are determined in consideration of the number of main support members 10 used, the volume of concrete used, and the like. On the other hand, in the illustrated specific example, the fixed substrate portion 12 is provided with five engagement fixing portions 14, and each of the engagement fixing portions 14 is embedded in the plane portion 2 in advance. Each of the anchor bolts 123 is engaged with each of the anchor bolts 123, and is fastened and fixed to the anchor bolts 123 by an appropriate nut or the like.

  On the other hand, the length of the main support member 10 is not particularly limited, but in the illustrated example, the length of the main support member 10 is set to 1.583 m, and the first The length of one fixed substrate portion 122 is extended from one end portion 4 of the support head 3 in the bridge girder 1 to the other end portion 4 ′ beyond the center point P of the bridge girder 1. It shows that it is the length.

  As shown in FIG. 9A, the configuration of the main support member 10 in the present invention is formed on the side plane of the wall portion 11 at the upper edge of the wall portion 11 of the main support member 10. On the other hand, it is also a preferable specific example that a flange 111 formed to have a predetermined angle, for example, 90 degrees, is further provided. As shown in FIG. 9C, the flange 111 may extend in the same plane direction with respect to the fixed substrate portion 12 and the side wall surface of the wall portion 11 described above. As shown to A), you may extend in the direction on the opposite side with respect to the side wall surface of the said wall part 11. FIG.

  Further, in the main support member 10 according to the present invention, at least the main support member 10 existing in the space 9 of the main support member 10 is shown in FIGS. 9D and 9E. As shown, it is desirable that an upward angle is applied to the flat portion 2 of the bridge girder 1 in consideration of the amount of bending of the main support member 10 after the concrete is poured.

  Next, in the cantilever floor formwork 106 according to the present invention, at least a part of the wall 11 in the main support member 10 existing in the space 9 and the rigidity are provided. At least a part of the lower mold body portion 8 is connected and fixed to each other via an appropriate hanging bracket 16. That is, as shown in FIGS. 1 to 3 and FIG. 6, one end of the hanging bracket 16 is joined and fixed to appropriate engagement fixing means 160 disposed on the side surface of the wall portion, and at the same time, the hanging bracket 16. The other end portion is fixedly bonded to the bottom surface portion 55 of the rigid lower mold body 8 via an appropriate bonding apparatus 162 directly or via an appropriate bonding auxiliary means 161. In the illustrated example, five hanging brackets 16 having different lengths are used to bond and fix the main support member 10 and the bottom surface portion 55 of the rigid lower mold body 8. In the above specific example, the length of the hanging metal fitting 16 gradually increases from the distal end portion 7 of the rigid lower mold body 8 toward the bridge girder 1 according to the inclination of the bottom surface portion 55 of the rigid lower mold body 8. The hanging angle of the hanging bracket 16 from the main support member 10 may be gradually increased.

  On the other hand, in the cantilever floor board mold 106 according to the present invention, at least a part of the wall 11 included in the first fixed substrate 122 and the rigid lower mold body 8 It is also a desirable specific example that at least a part of the bottom portion 55 is connected and fixed to the main support member 10 by an appropriate bending preventing metal fitting 17 disposed obliquely at a predetermined angle. By adopting such a configuration, the strength of the cantilever floor mold 106 is significantly increased.

  The number of the main support members 10 used in the cantilever floor plate form 106 in the present invention is not particularly limited, and the length is formed along the passage direction of the bridge girder 1. It is possible to set an appropriate number accordingly, but in the illustrated example, nine main support members 10 are arranged in parallel with each other in the one cantilever floor formwork 106. ing.

  Further, in the cantilever floor mold 106 according to the present invention, a plurality of reinforcing bars 107 are provided between the upper surface or the lower surface of the main support member 10 and the main support member 10. In the direction orthogonal to the arrangement direction, it may be arranged as a distribution bar, and further, a holding steel material 108 made of reinforcing bars arranged in a direction perpendicular to the arrangement direction of the main support member 10 is arranged. It may be.

  That is, the cantilever floor plate form 106 according to the present invention is not formed at the construction site of the bridge 102 but is formed at a factory different from the construction site, and the plurality The cantilever floor board form 106 including the main support member 10 of the book is formed as a block 300 having a predetermined length set along the length direction of the passage, As shown in FIG. 5, according to the length of the bridge girder 1 having a predetermined length in the passage direction, a plurality of blocks 300 are continuously arranged to form a frame for the cantilever floor slab structure of the passage. Will form. Finally, concrete is poured into the frame for the cantilever floor slab structure in which the cantilever floor plate form 106 is continuously arranged, and the floor plate structure having the cantilever structure is completed. .

  Next, as another specific example in the present invention, as shown in FIGS. 7 and 8, the cantilever floor plate form 106 is provided at the outermost portion 71 in the width direction of the passage 103. A retaining wall portion 400 is provided to be joined to the upper edge portion 81 of the rigid lower mold body portion 8 so as to stand in a substantially vertical direction with respect to the planar portion 2 of the bridge girder portion 1. The wall portion 400 is fixedly held by an appropriate retaining wall support member 401 connected between a part thereof and at least a part of the main support member 10. In this specific example, as shown in FIG. 7B, the upper edge portion 81 of the end edge portion 71 and the retaining wall portion 400 of the rigid lower mold body portion 8 are bent into an appropriate shape. Thus, it is joined and fixed by an appropriate joining means 402. The joining means 402 is fixed by a welding method or a joining method using an appropriate rivet. The height of the retaining wall is typically 1 m, for example, and the length is typically 2.25 m, for example.

  In the present invention, after the cantilever floor plate mold 106 having the above-described configuration is mounted on the bridge girder 1 as shown in FIGS. 1 to 5, the cantilever floor plate mold 106 is placed inside the cantilever floor plate mold 106. A cantilever flooring structure completed by pouring concrete can be obtained easily and at a low price in a short construction period.

  In the present invention, the above-mentioned cantilever floor plate formwork 106 is a plurality of kinds of different sizes, lengths, widths, and thicknesses in a predetermined factory different from the construction site. The product is manufactured, and each cantilever floor formwork 106 suitable for the length in the length direction of the passage to be set, the width and thickness of the cantilever portion, and the like is selected from them. The work can be carried into the construction site, and the cantilever floor board form 106 is difficult to install the above-mentioned scaffolding or a place where the installation is costly. Thus, the worker engaged in the work can perform all the work on the flat surface portion 2 formed on the support head 3 of the bridge girder 1, and comes out outside the edge of the bridge girder 1. It is designed so that there is no need to work. Because sometimes work has been simplified construction period is greatly shortened, and cost because there is no need or to dismantle or set an expensive scaffolding is to be significantly reduced natural.

  The cantilever floor board form 106 according to the present invention can be used to form a cantilever floor board structure formed on both side edges of every passage 103 provided by a bridge.

DESCRIPTION OF SYMBOLS 1 ... Bridge girder 2 ... Plane part 3 ... Support head part 4 ... End part of support head 5 ... Back surface part 6 ... Virtual extension line 7 ... Formwork edge part for cantilever floor board 8 ... Formwork for cantilever floor board 9 DESCRIPTION OF SYMBOLS ... Space part 10 ... Main support member 11 ... Wall part 12 ... Fixed board | substrate part 14 ... Engagement fixing means 15 ... Opening part 16 ... Hanging metal fitting 17 ... Deflection prevention metal fitting 53 ... Supporting work 55 ... Formwork for cantilever floor board Bottom part 56 ... Step part 71 ... Outermost part in width direction 81 ... Upper edge part 100 ... Floor board structure 102 ... Bridge 103 ... Passage 104 ... Width direction of passage 105 ... Cantilever structure 106 ... Mold for cantilever floor board Frame 111 ... collar part 122 ... first fixed substrate part 123 ... engagement member, anchor bolt 160 ... engagement fixing means 161 ... joining auxiliary means 200 ... support part 203 ... refracting part 300 ... block 400 ... retaining wall part 401 ... Retaining wall support member 40 ... joining means

Claims (14)

  For cantilever floor boards used in floor board structures with a cantilever structure formed at at least one end in the width direction of the passage formed by the bridge composed of bridge girder and floor board structure The cantilever floor plate formwork has an upper flat portion formed on a surface substantially orthogonal to the long axis of the leg portion, which is formed at the upper end portion of the leg portion of the bridge girder. And a virtual extension of the back portion of the bridge girder that extends outward from at least one end of the passage width direction of the support head having a function of supporting the floor plate structure and faces the flat portion of the bridge girder. A rigid lower mold body set so as to cover the wire and its edge, and at least a part of the plane part of the bridge girder part, and in the space part surrounded by the rigid lower mold part A plurality of elongated main supports arranged in parallel with each other The main support member is formed of a wall portion formed substantially perpendicular to the plane portion of the bridge girder portion and a substantially right angle to the wall portion from the lower end edge of the wall portion. And the fixed board part bent to the at least part of the first fixed board part facing the flat part of the bridge girder part of the fixed board part provided on the flat part of the bridge girder part. The lower end of the wall portion present in the space portion formed by the rigid lower mold body portion in the main support member at the same time that the engagement fixing means capable of engaging and fixing with the member is disposed. A plurality of openings are perforated in at least a part of the edge, and at least a part of the wall part present in the space part and at least a part of the rigid lower mold body part Is connected and fixed via an appropriate hanging bracket. Cantilever floor for formwork.   2. The cantilever floor board formwork according to claim 1, wherein the first fixed substrate part protrudes outside from the space part formed by the rigid lower mold part.   At least the main support member existing in the space of the main support member is angled upward with respect to the flat portion of the bridge girder in consideration of the amount of bending of the main support member after the concrete is poured. The formwork for cantilever floor boards according to claim 1 or 2, wherein   4. The method according to claim 1, wherein at least a part of the first fixed substrate part and at least a part of the rigid lower mold part are connected and fixed by an appropriate bending prevention metal fitting. Cantilever floor formwork as described in Crab.   2. The upper edge of the wall portion of the main support member is provided with a flange portion formed at a predetermined angle with respect to a side plane of the wall portion. The form for cantilever floor boards in any one of thru | or 4.   6. The cantilever floor board according to claim 1, wherein the engaging member provided in the flat portion of the bridge girder is an anchor bolt embedded in the flat portion. Formwork.   The engagement fixing means provided in the first fixing substrate portion of the main support member is configured by a hole portion through which the anchor bolt passes and a nut screwed into the anchor bolt. The formwork for cantilever floor boards according to claim 6.   The plurality of reinforcing bars are arranged between the upper surface or the lower surface of the main support members arranged in the cantilever floor plate form and the main support members. The cantilever floor board form according to any one of 1 to 7.   The length of the first fixed substrate portion is a length that extends from one end portion of the support head in the bridge girder to the other end side beyond the center point of the bridge girder. A cantilever floor board form according to any one of claims 1 to 8.   The cantilever floor plate formwork including the plurality of main support members is formed as a block having a predetermined length set along the length direction of the passage. The cantilever floor board form according to any one of claims 1 to 9.   The cantilever floor board formwork according to claim 10, wherein a plurality of cantilever floor board formwork blocks are continuously arranged adjacent to each other along the longitudinal direction of the passage.   Joined to the upper edge of the rigid lower mold part provided on the outermost part in the width direction of the passage of the cantilever floor mold, and substantially perpendicular to the flat part of the bridge girder part A retaining wall portion standing in the direction is provided, and the retaining wall portion is fixedly held by an appropriate retaining wall support member connected between a part thereof and at least a part of the main support member. The formwork for cantilever floor boards according to any one of claims 1 to 11, wherein the formwork is used.   The cantilever floor board formwork according to claim 12, wherein the upper edge part of the end edge part and the retaining wall part of the rigid lower mold body part are joined and fixed by rivets.   A cantilever floor slab structure formed by injecting concrete into the cantilever floor slab form according to any one of claims 1 to 13.

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