CN217839744U - Cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure - Google Patents

Abstract

The utility model discloses a cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure, including establishing the support on the concrete cushion, erect the truss distribution roof beam on the adjustable top support of support, lay the cast-in-place roof beam bottom template on the truss distribution roof beam and set up the preloading structure of piling on cast-in-place roof beam bottom template top surface, the truss distribution roof beam includes two structures the same and the fish belly formula truss roof beam that the symmetry was laid, fish belly formula truss roof beam is including the first arc truss that connects gradually, second arc truss and third arc truss. The utility model discloses a horizontal load that two fish belly formula truss girders can effectively overcome concreting production utilizes the curvilinear figure control demand that the camber arc of the cast-in-place roof beam bottom of hyperbola fish belly formula can be satisfied to curvilinear figure upper chord subassembly, has solved the problem that hyperbola fish belly formula cast-in-place roof beam template supports that the pre-compaction structure is complicated, the pre-compaction effect is poor, this pre-compaction stable in structure is reliable and construction, facilitate promotion and application of being convenient for.

Description

Hyperbola fish belly formula cast-in-place beam formwork support pre-compaction structure

Technical Field

The utility model belongs to the technical field of cast-in-place roof beam construction, concretely relates to cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure.

Background

The construction of the cast-in-place beam is one of the extremely important links in the construction of the bridge, and the safe and efficient erection of the template support system is a key step of the construction of the cast-in-place beam. At present, the conventional cast-in-place beam support system is mostly erected in the forms of full framing, steel pipe column Bailey beam erection, beam column combination and the like. However, a form of a targeted support system is not established for a cast-in-place beam support with a hyperbolic fish-belly type arc structure with a novel structure, linear control of a variable-curvature arc curve structure at the bottom of a fish-belly type concrete box beam is a difficulty in construction of the bridge type cast-in-place beam, and the variable-curvature arc curve structure at the bottom of the fish-belly type concrete box beam can enable an adjustable jacking eccentric load of the support system to be applied, so that the stress of the support system is unclear, and when the load is too large or relatively concentrated, the support system is in a destabilization state and has potential safety hazards; in order to check the bearing capacity of the support, eliminate the inelastic deformation of the support and the uneven settlement between the foundation treated outside the bearing platform and the bearing platform, find out the elastic deformation value of the support and the uneven settlement of the foundation, check whether the stability of the support and a template and the bearing capacity of the treated foundation can meet the requirements, measure the elastic settlement at the same time, provide the basis for the reserved camber of the support, carry out preloading after the installation of the template at the bottom of the cast-in-place beam is finished, the existing hyperbolic fish belly type cast-in-place beam template has complex supporting and preloading structure and poor preloading effect; therefore, a hyperbola fish belly type cast-in-place beam formwork support prepressing structure convenient for construction should be provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a cast-in-place roof beam formwork support pre-compaction structure of hyperbola fish belly formula, its simple structure, reasonable in design, the horizontal load that concreting produced can effectively be overcome to two fish belly formula truss girders, utilize the curvilinear figure control demand that the curved shape chord member can satisfy the variable camber arc of the cast-in-place roof beam bottom of hyperbola fish belly formula, pre-compaction stable in structure is reliable and the construction of being convenient for, and the facilitate promotion is used.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure which characterized in that: the fishnet type truss girder comprises two fishnet type truss girders which are the same in structure and symmetrically arranged, the fishnet type truss girder comprises a first arc truss, a second arc truss and a third arc truss which are sequentially connected, a first lower chord of the first arc truss, a second lower chord of the second arc truss and a third lower chord of the third arc truss are straight rods which are horizontally arranged, and a first upper chord of the first arc truss, a second upper chord of the second arc truss and a third upper chord of the third arc truss are arc rods, first upper chord member the second upper chord member with the third upper chord member connects gradually form with the cast-in-place roof beam bottom surface assorted curvilinear figure upper chord member subassembly of hyperbola fish belly formula, first chord member down the second lower chord member with the third lower chord member lays in proper order and forms the concave character form lower chord member subassembly, all through fastener fixed connection between adjacent first arc truss and the second arc truss and between adjacent second arc truss and the third arc truss, it is in to pile and carry pre-compaction structure including laying hyperbola fish belly formula concrete block layer on the cast-in-place roof beam bottom formwork top surface and setting up the rectangular concrete prefabricated section pile year layer at hyperbola fish belly formula concrete block layer top.

Foretell hyperbola fish belly formula cast-in-place beam formwork support pre-compaction structure, its characterized in that: be provided with a plurality of first vertical web members and a plurality of first slant web member between first chord member and the first upper chord member, be provided with a plurality of second vertical web members and a plurality of second slant web member between second chord member and the second upper chord member, be provided with a plurality of third vertical web members and a plurality of third slant web member between third chord member and the third upper chord member.

Foretell hyperbola fish belly formula cast-in-place beam formwork support pre-compaction structure, its characterized in that: the installation height of the first arc-shaped truss is flush with that of the third arc-shaped truss, and the installation height of the second arc-shaped truss is lower than that of the first arc-shaped truss.

Foretell a cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure, its characterized in that: vertical auxiliary connecting rods are arranged at two ends of the first lower chord member, a first inclined web member is arranged between the vertical auxiliary connecting rods and the first lower chord member, and the vertical auxiliary connecting rods are fixedly connected with a second vertical web member located on the outermost side of the second arc-shaped truss through fasteners.

Foretell a cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure, its characterized in that: the support is provided with a plurality of throwing supports, the top ends of the plurality of throwing supports form two concave support surfaces which are symmetrically arranged and matched with the concave lower chord assemblies, and the included angle between each throwing support and the concrete cushion layer is 60 degrees.

Foretell a cast-in-place roof beam template of hyperbola fish belly formula supports pre-compaction structure, its characterized in that: the bottom template of the cast-in-place beam adopts a bamboo plywood, and the thickness of the bamboo plywood ranges from 16mm to 20mm.

The construction method of the hyperbolic fish-bellied cast-in-place beam formwork support system is characterized by comprising the following steps of: the hyperbola fish belly formula concrete layer includes a plurality of special-shaped concrete prefabricated section of laying in proper order, every the top surface of special-shaped concrete prefabricated section is the rectangle plane, and the bottom surface concatenation of a plurality of special-shaped concrete prefabricated sections of laying in proper order forms jointly with the cast-in-place beam bottom surface assorted curved surface of hyperbola fish belly formula, cuboid concrete prefabricated section piles up the carrier layer and includes the same cuboid concrete prefabricated section of a plurality of structures.

Compared with the prior art, the utility model has the following advantage:

1. the utility model discloses a set up support and truss distribution roof beam, truss distribution roof beam include the fish belly formula truss roof beam that two structures are the same and the symmetry was laid, and fish belly formula truss roof beam is including the first arc truss, second arc truss and the third arc truss that connect gradually, and first upper chord member, second upper chord member and third upper chord member are the arc, first upper chord member the second upper chord member with third upper chord member connects gradually and forms and the cast-in-place roof beam bottom surface assorted curvilinear figure upper chord member subassembly of hyperbolic fish belly formula, and during the in-service use, compare with the distribution roof beam that square steel and steel pipe among the prior art set up, at the in-process of pouring the cast-in-place roof beam of cast-in-place concrete molding hyperbolic fish belly formula, the horizontal load that cast concrete produced can effectively be overcome to two fish belly formula truss roof beams, utilizes the curvilinear figure curved upper chord member subassembly can satisfy the curved line control demand of the variable camber arc of the cast-in-place truss bottom of hyperbolic fish belly formula, under the supporting role that support and distribution roof beam combined together, can satisfy the requirements of the cast-in different stages of construction of the hyperbolic fish belly formula.

2. The utility model discloses a horizontal load that truss distribution roof beam can effectually produce the cast-in-place roof beam of concreting shaping hyperbola fish belly formula turns into the internal force, can reliable and stable transmit the pole setting to the support with the load, and the wholeness of truss distribution roof beam is good, rigidity is high, helps improving the laying precision of template, can improve the finished product appearance quality of the cast-in-place roof beam of hyperbola fish belly formula.

3. The utility model discloses a set up on the cast-in-place roof beam bottom template top surface and pile and carry pre-compaction structure, and pile and carry pre-compaction structure and include hyperbola fish belly formula concrete piece layer and cuboid concrete prefabricated section and pile the layer, during the in-service use, hyperbola fish belly formula concrete piece layer is laid on cast-in-place roof beam bottom template top surface, the bottom surface and the cast-in-place roof beam bottom template top surface laminating of hyperbola fish belly formula concrete piece layer mutually, and the top surface on hyperbola fish belly formula concrete piece layer forms the planar structure of echelonment, rather than hyperbola fish belly formula curved surface structure, be convenient for pile at the top surface on hyperbola fish belly formula concrete piece layer and carry and form cuboid concrete prefabricated section and pile the layer, the construction degree of difficulty of pre-compaction has been reduced, the pre-compaction precision has been improved.

4. The utility model discloses a first arc truss, second arc truss and third arc truss all adopt welding mode prefabricated processing to make, hoist first arc truss in proper order at the job site, the in-process of second arc truss and third arc truss, between adjacent first arc truss and second arc truss and between adjacent second arc truss and the third arc truss only need pass through fastener fixed connection can, the control point of laying-out is measured at the job site is few, the installation effectiveness is high, the dismouting of being convenient for, and the facilitate promotion is used.

To sum up, the utility model has the advantages of simple structure and reasonable design, the horizontal load that concreting produced can effectively be overcome to two fish belly formula truss girders, utilizes curvilinear figure upper chord subassembly can satisfy the curvilinear figure control demand of the variable camber arc of hyperbola fish belly formula cast-in-place beam bottom, and pre-compaction stable in structure is reliable and the construction of being convenient for, and the facilitate promotion is used.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the utility model discloses the connection structure schematic diagram of preloading structure, cast-in-place roof beam bottom template, square timber layer and truss distribution roof beam.

Fig. 3 is a schematic structural view of the fish belly type truss girder of the present invention.

Description of reference numerals:

2, square timber; 3, casting a beam bottom template in situ; 4-a first arc truss;

4-1 — a first lower chord; 4-2 — a first upper chord; 4-3-a first vertical web member;

4-a first diagonal web member; 4-5-vertical auxiliary connecting rod; 5, a second arc-shaped truss;

5-1 — a second lower chord; 5-2-a second upper chord; 5-3-a second vertical web member;

5-4-a second diagonal web member; 6-third arc truss; 6-1-a third lower chord;

6-2 — a third upper chord; 6-3-a third vertical web member; 6-4-third diagonal web member;

7, a fastener; 8, a bracket; 8-1-adjustable jacking;

9-throwing and supporting; 10-concrete bedding; 11-special-shaped concrete precast blocks;

12-cuboid concrete precast block.

Detailed Description

As shown in fig. 1, 2 and 3, the utility model comprises a support 8 supported on a concrete cushion 10, a truss distribution beam erected on an adjustable top support 8-1 of the support 8, a cast-in-place beam bottom template 3 laid on the truss distribution beam, and a preloading structure arranged on the top surface of the cast-in-place beam bottom template 3, wherein the truss distribution beam comprises two fish-bellied truss beams which are identical in structure and symmetrically arranged, the fish-bellied truss beam comprises a first arc truss 4, a second arc truss 5 and a third arc truss 6 which are sequentially connected, the first lower chord 4-1 of the first arc truss 4, the second lower chord 5-1 of the second arc truss 5 and the third lower chord 6-1 of the third arc truss 6 are straight rods which are horizontally arranged, the first upper chord 4-2 of the first arc truss 4, the second upper chord 5-2 of the second arc truss 5 and the third upper chord 6-2 of the third arc truss 6 are arc-shaped rods, the first upper chord 4-2, the second upper chord 5-2 and the third upper chord 6-2 are sequentially connected to form a curve-shaped upper chord component matched with the bottom surface of the hyperbolic fish-bellied cast-in-place beam, the first lower chord 4-1, the second lower chord 5-1 and the third lower chord 6-1 are sequentially arranged to form a concave-shaped lower chord component, the adjacent first arc truss 4 and the second arc truss 5 and the adjacent third arc truss 6 are fixedly connected through fasteners 7, the stacking prepressing structure comprises a hyperbolic fish-bellied concrete layer laid on the top surface of the bottom formwork 3 of the hyperbolic fish-bellied concrete layer and a cast-in-place concrete layer arranged on the top of the hyperbolic fish-bellied concrete layer The rectangular solid concrete precast block of portion piles up carries the layer.

In the embodiment, the support 8 and the truss distribution beam are arranged, the truss distribution beam comprises two fishweb truss beams which are identical in structure and symmetrically distributed, the fishweb truss beams comprise a first arc truss 4, a second arc truss 5 and a third arc truss 6 which are sequentially connected, the first upper chord 4-2, the second upper chord 5-2 and the third upper chord 6-2 are arc-shaped rods, and the first upper chord 4-2, the second upper chord 5-2 and the third upper chord 6-2 are sequentially connected to form a curved upper chord component matched with the bottom surface of the hyperbolic fishweb cast-in-place beam.

During the in-service use, the horizontal load that the cast-in-place roof beam of truss distribution roof beam can effectual will pour concrete shaping hyperbola fish belly formula and produce turns into the internal force, can be reliable and stable transmit the load to the pole setting of support 8, the wholeness of truss distribution roof beam is good, rigidity is high, helps improving the laying accuracy of template, can improve the finished product appearance quality of hyperbola fish belly formula cast-in-place roof beam.

In this embodiment, the first lower chord 4-1, the second lower chord 5-1 and the third lower chord 6-1 are all set to be linear rods which are horizontally arranged, and the first lower chord 4-1, the second lower chord 5-1 and the third lower chord 6-1 are sequentially arranged to form the concave-shaped lower chord assembly, during actual use, connection lines of the top ends of the plurality of adjustable top supports 8-1 of the support 8 in a vertical plane form concave-shaped broken line sections matched with the concave-shaped lower chord assembly, and the first lower chord 4-1, the second lower chord 5-1 and the third lower chord 6-1 are all horizontally erected on the plurality of adjustable top supports 8-1, so that the condition that the adjustable top supports 8-1 are eccentrically loaded is avoided, the stress uniformity of the formwork support system is improved, the stress system of the formwork support system is clear, and the structure is reliable.

In this embodiment, first arc truss 4, second arc truss 5 and third arc truss 6 all adopt welding mode prefabricated manufacturing, hoist first arc truss, the in-process of second arc truss and third arc truss in proper order at the job site, between adjacent first arc truss 4 and second arc truss 5 and between adjacent second arc truss 5 and third arc truss 6 only need through fastener 7 fixed connection can, the control point of job site measurement lofting is few, the installation effectiveness is high, be convenient for the dismouting.

In this embodiment, through set up on the 3 top surfaces of cast-in-place roof beam bottom template and pile and carry pre-compaction structure, and pile and carry pre-compaction structure and include hyperbola fish belly formula concrete piece layer and cuboid concrete prefabricated section and pile and carry the layer, during the in-service use, hyperbola fish belly formula concrete piece layer is laid on 3 top surfaces of cast-in-place roof beam bottom template, the bottom surface on hyperbola fish belly formula concrete piece layer is laminated with 3 top surfaces of cast-in-place roof beam bottom template mutually, and the top surface on hyperbola fish belly formula concrete piece layer forms the planar structure of echelonment, but not hyperbola fish belly formula curved surface structure, be convenient for pile and carry at the top surface on hyperbola fish belly formula concrete piece layer and form cuboid concrete prefabricated section and pile and carry the layer, the construction degree of difficulty of pre-compaction has been reduced, the pre-compaction precision has been improved.

In this embodiment, a plurality of first vertical web members 4-3 and a plurality of first diagonal web members 4-4 are disposed between the first lower chord 4-1 and the first upper chord 4-2, a plurality of second vertical web members 5-3 and a plurality of second diagonal web members 5-4 are disposed between the second lower chord 5-1 and the second upper chord 5-2, and a plurality of third vertical web members 6-3 and a plurality of third diagonal web members 6-4 are disposed between the third lower chord 6-1 and the third upper chord 6-2.

In this embodiment, the plurality of first vertical web members 4-3 and the plurality of first diagonal web members 4-4 together form a stable support structure between the first lower chord 4-1 and the first upper chord 4-2, the plurality of second vertical web members 5-3 and the plurality of second diagonal web members 5-4 together form a stable support structure between the second lower chord 5-1 and the second upper chord 5-2, and the plurality of third vertical web members 6-3 and the plurality of third diagonal web members 6-4 together form a stable support structure between the third lower chord 6-1 and the third upper chord 6-2, which is helpful to improve the stability of the first arc truss 4, the second arc truss 5 and the third arc truss 6, and can effectively overcome the horizontal load generated by casting concrete.

As shown in fig. 2, in this embodiment, the installation height of the first arc-shaped truss 4 is equal to the installation height of the third arc-shaped truss 6, and the installation height of the second arc-shaped truss 5 is lower than the installation height of the first arc-shaped truss 4.

As shown in fig. 3, in this embodiment, vertical auxiliary connecting rods 4-5 are disposed at two ends of the first lower chord 4-1, a first oblique web member 4-4 is disposed between the vertical auxiliary connecting rod 4-5 and the first lower chord 4-1, and the vertical auxiliary connecting rod 4-5 is fixedly connected to a second vertical web member 5-3 located at the outermost side of the second arc-shaped truss 5 through a fastener 7.

In actual use, because the vertical height of the curved structure of the first upper chord 4-2 is high, and the vertical height of the curved structure of the second upper chord 5-2 is low, when the fastener 7 is used to connect the first arc-shaped truss 4 and the second arc-shaped truss 5, the installation position of the fastener 7 is limited, and only one fastener 7 can be installed between the adjacent first vertical web member 4-3 and the second vertical web member 5-3, which results in unreliable connection between the first arc-shaped truss 4 and the second arc-shaped truss 5, therefore, it is necessary to provide a vertical auxiliary connecting rod 4-5 at one end of the first lower chord 4-1, and to provide a first diagonal web member 4-4 between the vertical auxiliary connecting rod 4-5 and the first lower chord 4-1, and form a stable supporting structure at the lower left corner or the lower right corner of the first arc-shaped truss 4 by using the vertical auxiliary connecting rod 4-5 and the first diagonal web member 4-4 together, and the vertical auxiliary connecting rod 4-5 can provide a reliable installation space for the fastener 7, that is the vertical auxiliary connecting rod 4-5 and the vertical auxiliary connecting rod 4-5 is located at the outermost side of the second arc-shaped truss 5 and passes through the fixed web member 7.

As shown in fig. 1, in this embodiment, a plurality of throwing braces 9 are installed on the support 8, two concave supporting surfaces which are symmetrically arranged and matched with the concave lower chord assemblies are formed at the top ends of the plurality of throwing braces 9, and an included angle between the throwing braces 9 and the concrete cushion 10 is 60 °.

In this embodiment, by installing the plurality of throwing supports 9 on the support 8, the lateral stability of the support 8 can be enhanced by using the plurality of throwing supports 9, which is beneficial to positioning control of the support 8 in the setting process.

In this embodiment, the bottom formwork 3 of the cast-in-place beam is made of a bamboo plywood, and the thickness of the bamboo plywood ranges from 16mm to 20mm.

As shown in fig. 1 and 2, in this embodiment, the hyperbolic fish-belly formula concrete prefabricated section layer includes a plurality of special-shaped concrete prefabricated sections 11 of laying in proper order, every the top surface of special-shaped concrete prefabricated section 11 is the rectangle plane, and the bottom surface concatenation of a plurality of special-shaped concrete prefabricated sections 11 of laying in proper order forms the curved surface with hyperbolic fish-belly formula cast-in-place beam bottom surface assorted jointly, cuboid concrete prefabricated section piles the carrier and includes a plurality of rectangular concrete prefabricated sections 12 that the structure is the same.

As shown in fig. 1, in actual construction, firstly, a foundation is treated, then, a concrete cushion 10 is cast on the treated foundation, the width of the concrete cushion 10 is 100cm along the orthographic projection line of the hyperbolic fish-belly type cast-in-place beam, and then drainage ditches are built on two sides of the concrete cushion 10; secondly, erecting a support 8, and adjusting the horizontal heights of a plurality of adjustable jacking 8-1 to ensure that the top ends of the adjustable jacking 8-1 form two concave supporting surfaces which are symmetrically arranged and matched with the concave lower chord assemblies; prefabricating and hoisting the truss distribution beam; then, paving a square timber layer and a cast-in-place beam bottom template 3; and finally, pre-pressing the formwork support system on the top surface of the cast-in-place beam bottom formwork 3 by using a preloading structure.

The above, only be the preferred embodiment of the utility model discloses a it is not right to make any restriction the utility model discloses all according to the utility model discloses any simple modification, change and the equivalent structure change of technical essence to what above embodiment was made all still belong to the technical scheme's of the utility model protection within range.

Claims (7)

1. The utility model provides a cast-in-place roof beam template support pre-compaction structure of hyperbola fish belly formula which characterized in that: comprises a support (8) erected on a concrete cushion (10), a truss distribution beam erected on an adjustable jacking (8-1) of the support (8), a cast-in-place beam bottom template (3) laid on the truss distribution beam and a preloading structure arranged on the top surface of the cast-in-place beam bottom template (3), wherein the truss distribution beam comprises two fish-bellied truss beams which are identical in structure and symmetrically arranged, the fish-bellied truss beam comprises a first arc truss (4), a second arc truss (5) and a third arc truss (6) which are sequentially connected, the first lower chord (4-1) of the first arc-shaped truss (4), the second lower chord (5-1) of the second arc-shaped truss (5) and the third lower chord (6-1) of the third arc-shaped truss (6) are all linear rods which are horizontally arranged, the first upper chord (4-2) of the first arc-shaped truss (4), the second upper chord (5-2) of the second arc-shaped truss (5) and the third upper chord (6-2) of the third arc-shaped truss (6) are all arc-shaped rods, the first upper chord (4-2), the second upper chord (5-2) and the third upper chord (6-2) are sequentially connected to form a curve-shaped upper chord component matched with the bottom surface of the hyperbolic fish-belly type cast-in-place beam, the first lower chord (4-1) is arranged on the bottom surface of the cast-in-place beam, and the second lower chord (5-1) is arranged on the bottom surface of the hyperbolic fish-belly type cast-in-place beam, second lower chord member (5-1) with third lower chord member (6-1) are laid in proper order and are formed concave font lower chord member subassembly, all through fastener (7) fixed connection between adjacent first arc truss (4) and second arc truss (5) and between adjacent second arc truss (5) and third arc truss (6), it is in to pile load pre-compaction structure including laying hyperbola fish belly formula concrete block layer on cast-in-place roof beam bottom template (3) top surface and setting up the rectangular concrete prefabricated section pile layer at hyperbola fish belly formula concrete block layer top.

2. The hyperbola fish belly type cast-in-place beam formwork support pre-pressing structure of claim 1, characterized in that: a plurality of first vertical web members (4-3) and a plurality of first oblique web members (4-4) are arranged between the first lower chord (4-1) and the first upper chord (4-2), a plurality of second vertical web members (5-3) and a plurality of second oblique web members (5-4) are arranged between the second lower chord (5-1) and the second upper chord (5-2), and a plurality of third vertical web members (6-3) and a plurality of third oblique web members (6-4) are arranged between the third lower chord (6-1) and the third upper chord (6-2).

3. The hyperbola fish belly type cast-in-place beam formwork support pre-pressing structure of claim 1, characterized in that: the installation height of the first arc-shaped truss (4) is flush with that of the third arc-shaped truss (6), and the installation height of the second arc-shaped truss (5) is lower than that of the first arc-shaped truss (4).

4. The hyperbola fish belly type cast-in-place beam formwork support pre-pressing structure of claim 1, characterized in that: vertical auxiliary connecting rods (4-5) are arranged at two ends of the first lower chord (4-1), a first inclined web member (4-4) is arranged between the vertical auxiliary connecting rods (4-5) and the first lower chord (4-1), and the vertical auxiliary connecting rods (4-5) are fixedly connected with second vertical web members (5-3) located on the outermost side of the second arc-shaped truss (5) through fasteners (7).

5. The hyperbola fish belly type cast-in-place beam formwork support pre-pressing structure according to claim 1, characterized in that: a plurality of throwing supports (9) are installed on the support (8), two concave-shaped supporting surfaces which are symmetrically arranged and matched with the concave-shaped lower chord assemblies are formed at the top ends of the plurality of throwing supports (9), and the included angle between each throwing support (9) and the concrete cushion (10) is 60 degrees.

6. The hyperbola fish belly type cast-in-place beam formwork support pre-pressing structure of claim 1, characterized in that: the bottom template (3) of the cast-in-place beam adopts a bamboo plywood, and the thickness of the bamboo plywood ranges from 16mm to 20mm.

7. The hyperbola fish belly type cast-in-place beam formwork support pre-pressing structure of claim 1, characterized in that: the hyperbola fish belly formula concrete block layer includes a plurality of special-shaped concrete prefabricated section (11) of laying in proper order, every the top surface of special-shaped concrete prefabricated section (11) is the rectangle plane, and the bottom surface concatenation of a plurality of special-shaped concrete prefabricated section (11) of laying in proper order forms jointly with the cast-in-place beam bottom surface assorted curved surface of hyperbola fish belly formula, cuboid concrete prefabricated section piles up the carrier layer and includes the same cuboid concrete prefabricated section (12) of a plurality of structures.

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