Intelligent construction method of arch bridge type cavity composite cover based on BIM modeling

Abstract

The present invention is an intelligent construction method for arch bridge type cavity superimposed cover plate based on BIM modeling, and the steps are: perform BIM modeling according to the requirements of the standardized arch bridge type structure to form a construction structure; perform simulation, and modify the structure and size that do not meet the requirements, and then simulate until the standard requirements are met; extract the model data of BIM modeling, generate various parts drawings and specific construction steps; program according to the parts drawings, import them into CNC machine tools, and accurately cut and process parts of specified sizes and shapes; assemble parts according to the construction steps, and then apply them to the construction and casting of the standardized arch bridge type structure. The present invention uses BIM modeling to extract data, and the intelligent CNC machine tool cuts and processes the size and shape to form an arch bridge type cavity casting mold construction system, which greatly saves the construction process, has accurate size control, reliable reinforcement method, and good molding effect; reduces material waste, and greatly reduces the safety risk of limited space operations.

Description

Technical Field

[0001] The present invention relates to the technical field of cast-in-place construction of continuous arch bridge type cavity top slabs, and in particular to an intelligent construction method of arch bridge type cavity superimposed cover slabs based on BIM modeling. Background Art

[0002] With the advancement of science and technology, the shapes of modern buildings tend to be diversified and special, and special structural systems are becoming more and more popular. In particular, in order to meet the special use properties of specific buildings, cast-in-place special-shaped structures stand out. The design is composed of a continuous semicircular arch plate and a horizontal axil cover plate. In order to achieve this shape while reducing material consumption and reducing the weight of the structure, its two ends are closed by reinforced concrete side plates to form a cast-in-place reinforced concrete umbrella arch closed cavity, of which the upper flat surface is a planting roof. The traditional arched cast-in-place structure uses a steel grid strip keel + strip formwork for combined support. The strip construction process is cumbersome, the construction period is long, the construction reinforcement is difficult, and the molding effect is poor; and the formwork in the closed cavity is often unable to be removed, resulting in material waste and a safety hazard in a limited space. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide an intelligent construction method for arch bridge type cavity composite cover plates based on BIM modeling.

[0004] The present invention discloses an intelligent construction method for arch bridge type cavity superimposed cover plate based on BIM modeling, which is carried out in the following steps:

[0005] S1: Carry out BIM modeling according to the requirements of the standardized arch bridge structure to form a construction structure;

[0006] S2: According to the BIM model, simulation is carried out, and the structures and dimensions that do not meet the requirements are modified, and then simulation is carried out again until the standard requirements are met;

[0007] S3: Extract the model data of BIM modeling and generate each parts drawing and specific construction steps;

[0008] S4: Programming is performed according to the part drawing, imported into the CNC machine tool, and then the parts of the specified size and shape are accurately cut and processed;

[0009] S5: Assemble the parts according to the specific construction steps, and then apply them to the construction and pouring of the finalized arch bridge structure.

[0010] Further, in step S1, the formed construction structure includes a socket-type disc buckle support frame, an adjustable dislocation bracket, a flat steel main keel, a square steel pipe secondary keel, an arch bridge type cavity casting mold, an axil plate support frame, a support-free corrugated steel plate and a construction joint combined waterproof structure; the top of the socket-type disc buckle support frame is provided with an adjustable dislocation bracket; the bottom of the arch bridge type cavity casting mold is provided with a square steel pipe secondary keel for support; the flat steel main keel is provided under the square steel pipe secondary keel; after the square steel pipe secondary keel and the flat steel main keel are installed, A curved surface structure corresponding to the outer side of the arch bridge type cavity casting mold is formed; a plurality of the offset adjustable brackets are respectively arranged on the load-bearing beams on the lower surface and the bottom surface of the flat steel main keel to form side and bottom supports; an axilla plate support frame is arranged inside the arch bridge type cavity casting mold, and the top outer surface of the arch bridge type cavity casting mold 7 is supported by the support-free corrugated steel plate arranged on the axilla plate support frame; the construction joints between the outer surfaces on both sides of the arch bridge type cavity casting mold and the square steel tube secondary keels are sealed by a construction joint combined waterproof structure.

[0011] Furthermore, the socket-type buckle support frame includes a base, buckle vertical poles, buckle horizontal poles, buckle diagonal poles and side wall diagonal supports; the buckle vertical poles are fixed by the buckle horizontal poles; with the vertical center line of the arch bridge type cavity casting mold as the axis of symmetry, the buckle vertical poles are fixedly connected with each other by the buckle diagonal poles to form an inverted V-shaped support system; the buckle vertical poles in the V-shaped support system are also provided with side wall diagonal supports for contacting and supporting the flat steel main keel; a base is provided at the bottom of each of the buckle vertical poles.

[0012] Furthermore, the offset adjustable bracket includes a socket sleeve, a tray, a bracket body and a steel pipe keel; the bracket body includes a supporting body, a load-bearing rod and a reinforcing rib plate; the supporting body is arranged on the load-bearing rod; the bottom of the supporting body is fixed to the load-bearing rod by reinforcing rib plates on both sides; a tray is arranged in the middle of the load-bearing rod, and a socket sleeve is arranged at the bottom; a group of steel pipe keels are arranged on the supporting body; a group of steel pipe keels are arranged corresponding to the arc surface of the flat steel main keel of the corresponding supporting part.

[0013] Furthermore, the flat steel main keel adopts an arc-shaped keel plate structure, and a side circular hole is arranged on the arc-shaped keel plate; the square steel tube secondary keel adopts a square steel tube with ear plate arranged along the outer surface of the arc-shaped keel plate, and the arc-shaped keel plate and the ear plate of the square steel tube with ear plate are fixed by bolts passing through the side circular holes.

[0014] Furthermore, the arch bridge type cavity casting mold includes a plain concrete formwork and a three-stage water-stop tension screw; the upper plain concrete formwork and the lower plain concrete formwork are connected by the three-stage water-stop tension screw to form an arch bridge type cavity casting mold module, and the adjacent arch bridge type cavity casting mold modules are respectively connected to the corresponding upper plain concrete formwork and the lower plain concrete formwork by four-hole corner codes; a sealing rubber strip is arranged in the joint of the plain concrete formwork; the four-hole corner code is fixed to the plain concrete formwork by screws passing through the corner code fixing holes on the corner code; the corner code is connected in the middle by a hinge ring; and the elevation is fine-tuned.

[0015] Furthermore, the support-free corrugated steel plate includes side closed steel plates, a bottom support-free steel plate and a middle steel truss structure; the two sides of the bottom support-free steel plate are respectively provided with side closed steel plates, and the middle is respectively provided with a middle steel truss structure.

[0016] Furthermore, the armpit plate support frame includes a steel pipe scaffolding and a wooden formwork; the steel pipe scaffolding is arranged inside the arch bridge type cavity casting mold; the wooden formwork is fixed on the steel pipe scaffolding to support the bottom support-free steel plate and the middle steel truss structure.

[0017] Furthermore, the construction joint combined waterproof structure includes a waterstop steel plate, a water-swelling waterstop strip and an external waterstop belt; the waterstop steel plate is fixed on a three-section waterstop tension screw between the construction joint where the outer surfaces of both sides of the arch bridge type cavity casting mold are connected to the square steel pipe secondary keel; water-swelling waterstop strips are respectively arranged on the upper and lower surfaces of the waterstop steel plate, and the water-swelling waterstop strip on the upper surface of the waterstop steel plate is sealed by the external waterstop belt.

[0018] Furthermore, the specific construction steps are: through the BIM modeling model, simulation is carried out to generate the required structure and size, and then the components are assembled, and then the installation position is marked on the construction site, the socket-type disc buckle support frame is built, and the adjustable bracket is installed to the top of the disc buckle upright on the socket-type disc buckle support frame, and each adjustable bracket reaches the corresponding design elevation by adjusting the position of the socket sleeve and the disc buckle upright; the load-bearing beam is fixed to the adjustable bracket at the lowest position, and a group of steel pipe keels on the adjustable bracket at the lowest position are arranged horizontally side by side; then the flat steel main keel is hoisted onto the adjustable bracket, and the lower end of the flat steel main keel is fixed to the load-bearing beam; then the square steel tube secondary keel is installed on the flat steel main keel, and the bolts pass through the circular holes on the side to fix the arc keel The plate is fixed to the ear plate of the square steel pipe with ear plate; then the arch bridge type cavity casting mold is erected on the square steel pipe secondary keel, and fixed to the square steel pipe secondary keel by the three-stage water-stop tension screw, and then the connection gap between the arch bridge type cavity casting mold and the square steel pipe secondary keel is sealed with weather-resistant sealant to form a sealing area; then the axil plate support frame is installed in the erected arch bridge type cavity casting mold to make the wooden square formwork fully contact and support the bottom support-free steel plate and the middle steel truss structure; then the construction joint between the outer surfaces on both sides of the arch bridge type cavity casting mold and the square steel pipe secondary keel is sealed by the construction joint combined waterproof structure; after completing all the processes and checking that the installation is in place, the arch bridge type cavity casting mold is cast to complete the intelligent construction of the finalized arch bridge type cavity composite cover plate.

[0019] To sum up: the present invention adopts BIM modeling to extract data, and the intelligent CNC machine tool cuts and processes the arched steel keel with precise size and shape + offset adjustable bracket + double sandwich arch bridge cavity casting mold system. The flat steel main keel adopts CNC machine tool laser cutting 80*8mm thick @100mm round hole steel plate into the required curvature, and is welded and assembled by 40mm short square steel; the square steel pipe secondary keel adopts 40*4mm square steel pipe to set the secondary keel, and is fixed to the flat steel main keel by bolts; the four-hole corner code is used to fix the back seam at an interval of 40cm; weather-resistant sealant ensures the tightness of the seam; the steel pipe diagonal brace is 48*3.0mm@2000mm steel pipe scaffolding diagonal brace , used to support the larger deformation in the middle of the arch bridge type cavity casting mold; the axil plate support frame adopts a combination of 48*3.0mm steel pipe scaffolding and wooden formwork for support; the support-free corrugated steel plate is a closed-end corrugated steel plate, which can be supported within a range of 2m, reducing the investment and dismantling of the cavity formwork; the construction joint combined waterproof structure is a waterproof treatment structure of the construction joint before pouring, which is installed across the seam through the angle code, which greatly saves the construction process, has precise size control, reliable reinforcement method and good molding effect; the secondary construction cavity position adopts the axil plate support frame as the construction platform, and uses the support-free corrugated steel plate as the support-free force, which reduces material waste and greatly reduces the safety risk of limited space operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the construction structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the installation of the arch bridge type cavity casting mold and the axil plate support frame of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the socket-and-spigot type disc buckle support frame of the present invention.

[0023] Figure 4 The present invention is a schematic diagram of the structure of the offset adjustable bracket located below the side of the arch bridge type cavity casting mold.

[0024] Figure 5 The present invention is a schematic diagram of the structure of the offset adjustable bracket located at the upper installation position of the arch bridge type cavity casting mold side.

[0025] Figure 6 It is a schematic diagram of the structure of the offset adjustable bracket located at the lowest installation position of the arch bridge type cavity casting mold of the present invention.

[0026] Figure 7 It is a schematic diagram of the installation and connection of the flat steel main keel, the square steel tube secondary keel and the arch bridge type cavity casting mold of the present invention.

[0027] Figure 8 For the present invention Figure 7 Enlarged structural diagram at H in the middle.

[0028] Fig. 9 It is a schematic diagram of the installation structure of the flat steel main keel and the square steel tube secondary keel of the present invention.

[0029] Fig.10 It is a schematic diagram of the arch bridge type cavity casting mold and the four-hole corner bracket installation structure of the present invention.

[0030] Fig.11 This is a schematic diagram of the support-free corrugated steel plate structure of the present invention.

[0031] Fig.12 For the present invention Figure 1 Enlarged schematic diagram of the combined waterproof structure of the construction joint at position M in the middle.

[0032] Wherein: socket-type buckle support frame 1; base 101; buckle vertical rod 102; buckle horizontal rod 103; buckle inclined rod 104; side wall inclined support 105;

[0033] Dislocation adjustable bracket 2; socket sleeve 21; tray 22; bracket body 23; steel pipe keel 24; supporting body 231; bearing rod 232; reinforcing rib plate 233;

[0034] Flat steel main keel 3; curved keel plate 31; side circular hole 32;

[0035] Square steel tube secondary keel 4; square steel tube with ear plate 41; bolt 42;

[0036] Four-hole corner bracket 5; corner bracket 51; hinge ring 52; corner bracket fixing hole 53;

[0037] Sealing area 6;

[0038] Arch bridge type cavity casting mold 7; plain water mold plate 71; three-stage water-stop tension screw rod 72; sealing rubber strip 73;

[0039] Axillary plate support frame 8; steel pipe scaffolding 81; wooden formwork 82;

[0040] Support-free corrugated steel plate 9; side closed steel plate 91; bottom support-free steel plate 92; middle steel truss structure 93;

[0041] Construction joint combined waterproof structure 10; water-stop steel plate 106; water-expanding water-stop strip 107; external water-stop strip 108;

[0042] Load-bearing beam 11. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] like Figures 1 to 12 As shown in the figure, the intelligent construction method of arch bridge type cavity composite cover plate based on BIM modeling is carried out in the following steps:

[0045] S1: Carry out BIM modeling according to the requirements of the standardized arch bridge structure to form a construction structure;

[0046] S2: According to the BIM model, simulation is carried out, and the structures and dimensions that do not meet the requirements are modified, and then simulation is carried out again until the standard requirements are met;

[0047] S3: Extract the model data of BIM modeling and generate each parts drawing and specific construction steps;

[0048] S4: Programming is performed according to the part drawing, imported into the CNC machine tool, and then the parts of the specified size and shape are accurately cut and processed;

[0049] S5: Assemble the parts according to the specific construction steps, and then apply them to the construction and pouring of the finalized arch bridge structure.

[0050] Further, in step S1, if Figure 1As shown, the formed construction structure includes a socket-type disc buckle support frame 1, an adjustable dislocation bracket 2, a flat steel main keel 3, a square steel pipe secondary keel 4, an arch bridge type cavity casting mold 7, an axil plate support frame 8, a support-free corrugated steel plate 9 and a construction joint combined waterproof structure 10; the top of the socket-type disc buckle support frame 1 is provided with an adjustable dislocation bracket 2; the bottom of the arch bridge type cavity casting mold 7 is provided with a square steel pipe secondary keel 4 for support; the bottom of the square steel pipe secondary keel 4 is provided with a flat steel main keel 3; after the square steel pipe secondary keel 4 and the flat steel main keel 3 are erected, a construction joint combined waterproof structure 10 is formed. The outer side of the arch bridge type cavity casting mold 7 corresponds to a curved surface structure; a plurality of the offset adjustable brackets 2 are respectively arranged on the lower surface and the bottom load-bearing beam 11 of the flat steel main keel 3 to form side and bottom supports; an axilla plate support frame 8 is arranged inside the arch bridge type cavity casting mold 7, and the top outer surface of the arch bridge type cavity casting mold 7 is supported by the support-free corrugated steel plate 9 arranged on the axilla plate support frame 8; the construction joint between the outer surfaces on both sides of the arch bridge type cavity casting mold 7 and the square steel tube secondary keel 4 is sealed by a construction joint combined waterproof structure 10.

[0051] As a preferred embodiment, Figure 3 As shown, the socket-type buckle support frame 1 includes a base 101, a buckle vertical rod 102; a buckle horizontal rod 103, a buckle diagonal rod 104 and a side wall diagonal support 105; the buckle vertical rod 102 is fixed by the buckle horizontal rod 103; with the vertical center line of the arch bridge type cavity casting mold 7 as the symmetry axis, the buckle vertical rod 102 and the buckle vertical rod 102 are fixedly connected by the buckle diagonal rod 104 to form an inverted V-shaped support system; the buckle vertical rod 102 in the V-shaped support system is also provided with a side wall diagonal support 105 for contacting and supporting the flat steel main keel 3; a base 101 is provided at the bottom of each of the buckle vertical rods 102 to reduce the investment and demoulding of the cavity formwork frame; the two brackets together constitute the construction system of the cavity structure.

[0052] As a preferred embodiment, Figures 4 to 6 As shown, the offset adjustable bracket 2 includes a socket sleeve 21, a tray 22, a bracket body 23 and a steel pipe keel 24; the bracket body 23 includes a supporting body 231, a load-bearing rod 232 and a reinforcing rib plate 233; the load-bearing rod 232 is provided with a supporting body 231; the bottom of the supporting body 231 is fixed to the load-bearing rod 232 by reinforcing rib plates 233 on both sides; the middle part of the load-bearing rod 232 is provided with a tray 22, and the bottom is provided with a socket sleeve 21; a group of steel pipe keels 24 are provided on the supporting body 231; a group of steel pipe keels 24 are arranged corresponding to the arc surface of the flat steel main keel 3 at the corresponding supporting position.

[0053] As a preferred embodiment, Figures 7 to 9As shown, the flat steel main keel 3 adopts an arc-shaped keel plate 31 structure, and a side circular hole 32 is arranged on the arc-shaped keel plate 31; the square steel tube secondary keel 4 adopts a square steel tube with ear plate 41 arranged along the outer surface of the arc-shaped keel plate 31, and the arc-shaped keel plate 31 is fixed to the ear plate of the square steel tube with ear plate 41 by passing a bolt 42 through the side circular hole 32.

[0054] As a preferred embodiment, Fig. 9 and Fig.10 As shown, the arch bridge type cavity casting mold 7 includes a plain water template 71 and a three-stage water-stop tension screw 72; the upper plain water template 71 and the lower plain water template 71 are connected by the three-stage water-stop tension screw 72 to form an arch bridge type cavity casting mold module, and the adjacent arch bridge type cavity casting mold modules are respectively connected to the corresponding upper plain water template 71 and the lower plain water template 71 by four-hole corner codes 5; a sealing rubber strip 73 is provided in the joint of the plain water template 71; the four-hole corner code 5 is fixed to the plain water template 71 by screws passing through the corner code fixing holes 53 on the corner code 51; the middle of the corner code 51 is connected by a hinge ring 52; the elevation is fine-tuned, BIM modeling and simulation are adopted, and CNC machining is used to produce the finalized keel and template, and four-hole corner codes are adopted for connection, which improves the flatness of the template and the reliability of connection, ensures the molding effect, and ensures the quality of one-time casting.

[0055] As a preferred embodiment, Fig.11 As shown, the support-free corrugated steel plate 9 includes a side closed steel plate 91, a bottom support-free steel plate 92 and a middle steel truss structure 93; the bottom support-free steel plate 92 is provided with side closed steel plates 91 on both sides and a middle steel truss structure 93 in the middle, which increases the overall rigidity and stability and reduces the investment in cavity formwork and formwork removal.

[0056] As a preferred embodiment, Figure 2 As shown, the armpit plate support frame 8 includes a steel pipe scaffolding 81 and a wooden formwork 82; the steel pipe scaffolding 81 is arranged inside the arch bridge type cavity casting mold 7; the wooden formwork 82 is fixed on the steel pipe scaffolding 81, and is used to support the bottom support-free steel plate 92 and the middle steel truss structure 93.

[0057] As a preferred embodiment, Fig.12As shown, the construction joint combined waterproof structure 10 includes a waterstop steel plate 106, a water-swellable waterstop strip 107 and an external waterstop belt 108; the waterstop steel plate 106 is fixed on a three-section waterstop tension screw 72 between the construction joints where the outer surfaces of both sides of the arch bridge type cavity casting mold 7 are connected to the square steel tube secondary keel 4; water-swellable waterstop strips 107 are respectively arranged on the upper and lower surfaces of the waterstop steel plate 106, and the water-swellable waterstop strip 107 on the upper surface of the waterstop steel plate 106 is sealed by the external waterstop belt 108, and the multiple waterproof structures ensure the structural integrity and improve the waterproof performance.

[0058] As a preferred embodiment, the specific construction steps are: through the BIM modeling model, simulation is carried out to generate a structure and size that meets the requirements, and then the components are assembled, and then the installation position is marked at the construction site, the socket-type disc buckle support frame 1 is built, and the adjustable bracket 2 is installed to the top of the disc buckle upright 102 on the socket-type disc buckle support frame 1, and each adjustable bracket 2 reaches the corresponding design elevation by adjusting the position of the socket sleeve 21 and the disc buckle upright 102; the load-bearing beam 11 is fixed to the adjustable bracket 2 at the lowest position, and a group of steel pipe keels 24 on the adjustable bracket 2 at the lowest position are arranged horizontally side by side; then the flat steel main keel 3 is hoisted onto the adjustable bracket 2, and the lower end of the flat steel main keel 3 is fixed to the load-bearing beam 11; then the square steel pipe secondary keel 4 is installed on the flat steel main keel 3, and the bolt 42 passes through the side circular hole 32 to fix the arc The shaped keel plate 31 is fixed with the ear plate of the square steel pipe with ear plate 41; then the arch bridge type cavity casting mold 7 is erected on the square steel pipe secondary keel 4, and fixed to the square steel pipe secondary keel 4 by the three-stage water-stop tension screw 72, and then the connection gap between the arch bridge type cavity casting mold 7 and the square steel pipe secondary keel 4 is sealed with weather-resistant sealant to form a sealing area 6; then the axil plate support frame 8 is installed in the erected arch bridge type cavity casting mold 7, so that the wooden square template 82 is fully in contact with and supported by the bottom support-free steel plate 92 and the middle steel truss structure 93; then the construction joint between the outer surfaces of both sides of the arch bridge type cavity casting mold 7 and the square steel pipe secondary keel 4 is sealed by the construction joint combined waterproof structure 10; after completing all the processes and checking that the installation is in place, the arch bridge type cavity casting mold 7 is cast to complete the intelligent construction of the finalized arch bridge type cavity composite cover plate.

[0059] The present invention adopts BIM modeling and simulation to improve the rationality of the design, and then extracts data, and uses intelligent CNC machine tools to cut and process an arched steel keel + an adjustable offset bracket + a double-layer arch bridge type cavity casting mold system with precise size and shape. It is installed across the seam through angle codes, which greatly saves construction procedures, has precise size control, reliable reinforcement method, and good molding effect. The secondary construction cavity position adopts axillary plate support frame as a construction platform, and uses support-free corrugated steel plates as support-free force, which reduces material waste and greatly reduces the safety risks of limited space operations. It realizes rapid installation of the template and avoids the template support from being stranded in the closed space, which meets the requirements of green construction, ensures the safety of construction workers, and improves the service life of the building and ensures safe use.

[0060] Although the specific embodiments of the present invention are described and illustrated in detail above, it should be pointed out that: we can make various equivalent changes and modifications to the above embodiments based on the concept of the present invention, and the functional effects produced by them still do not exceed the spirit covered by the specification, and they should all be within the scope of protection of the present invention.

Claims

1. The intelligent construction method of arch bridge type cavity composite cover plate based on BIM modeling is characterized by: following the steps: S1: Carry out BIM modeling according to the requirements of the standardized arch bridge structure to form a construction structure; S2: According to the BIM model, simulation is carried out, and the structures and dimensions that do not meet the requirements are modified, and then simulation is carried out again until the standard requirements are met; S3: Extract the model data of BIM modeling and generate each parts drawing and specific construction steps; S4: Programming is performed according to the part drawing, imported into the CNC machine tool, and then the parts of the specified size and shape are accurately cut and processed; S5: Assemble the parts according to specific construction steps, and then apply them to the construction and pouring of the finalized arch bridge structure; In step S1, the formed construction structure includes a socket-type disc buckle support frame, an adjustable dislocation bracket, a flat steel main keel, a square steel pipe secondary keel, an arch bridge type cavity casting mold, an axil plate support frame, a support-free corrugated steel plate and a construction joint combined waterproof structure; the top of the socket-type disc buckle support frame is provided with an adjustable dislocation bracket; the bottom of the arch bridge type cavity casting mold is provided with a square steel pipe secondary keel for support; the flat steel main keel is provided under the square steel pipe secondary keel; after the square steel pipe secondary keel and the flat steel main keel are arranged, a waterproof structure with The outer side of the arch bridge type cavity casting mold corresponds to the curved surface structure; multiple offset adjustable brackets are respectively arranged on the lower surface of the flat steel main keel and the load-bearing beam on the bottom surface to form side and bottom supports; an axilla plate support frame is arranged inside the arch bridge type cavity casting mold, and the top outer surface of the arch bridge type cavity casting mold 7 is supported by the support-free corrugated steel plate arranged on the axilla plate support frame; the construction joint between the outer surfaces on both sides of the arch bridge type cavity casting mold and the square steel tube secondary keel is sealed by a construction joint combined waterproof structure.

2. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The socket-and-socket type buckle support frame includes a base, buckle vertical rods, buckle horizontal rods, buckle diagonal rods and side wall diagonal supports; the buckle vertical rods are fixed by the buckle horizontal rods; with the vertical center line of the arch bridge type cavity casting mold as the symmetry axis, the buckle vertical rods are fixedly connected with each other by the buckle diagonal rods to form an inverted V-shaped support system; the buckle vertical rods in the V-shaped support system are also provided with side wall diagonal supports for contacting and supporting the flat steel main keel; a base is provided at the bottom of each of the buckle vertical rods.

3. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The offset adjustable bracket includes a socket sleeve, a tray, a bracket body and a steel pipe keel; the bracket body includes a supporting body, a load-bearing rod and a reinforcing rib plate; the supporting body is arranged on the load-bearing rod; the bottom of the supporting body is fixed to the load-bearing rod by reinforcing rib plates on both sides; a tray is arranged in the middle of the load-bearing rod, and a socket sleeve is arranged at the bottom; a group of steel pipe keels are arranged on the supporting body; a group of steel pipe keels are arranged corresponding to the arc surface of the flat steel main keel at the corresponding supporting position.

4. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The flat steel main keel adopts an arc-shaped keel plate structure, and a side circular hole is arranged on the arc-shaped keel plate; the square steel tube secondary keel adopts a square steel tube with ear plates arranged along the outer surface of the arc-shaped keel plate, and the arc-shaped keel plate and the ear plates of the square steel tube with ear plates are fixed by bolts passing through the side circular holes.

5. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The arch bridge type cavity casting mold includes a plain concrete template and a three-stage water-stop tension screw; the upper plain concrete template and the lower plain concrete template are connected by the three-stage water-stop tension screw to form an arch bridge type cavity casting mold module, and the adjacent arch bridge type cavity casting mold modules are respectively connected to the corresponding upper plain concrete template and the lower plain concrete template by four-hole corner codes; a sealing rubber strip is arranged in the joint of the plain concrete template; the four-hole corner code is fixed to the plain concrete template by screws passing through the corner code fixing holes on the corner code; the middle of the corner code is connected by a hinged ring to fine-tune the elevation.

6. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The support-free corrugated steel plate includes side closed steel plates, a bottom support-free steel plate and a middle steel truss structure; the two sides of the bottom support-free steel plate are respectively provided with side closed steel plates, and the middle is respectively provided with a middle steel truss structure.

7. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The axil plate support frame includes a steel pipe scaffolding and a wooden formwork; the steel pipe scaffolding is arranged inside the arch bridge type cavity casting mold; the wooden formwork is fixed on the steel pipe scaffolding to support the bottom support-free steel plate and the middle steel truss structure.

8. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 1 is characterized in that: The construction joint combined waterproof structure includes a waterstop steel plate, a water-swelling waterstop strip and an external waterstop belt; the waterstop steel plate is fixed on a three-section waterstop tension screw between the construction joint where the outer surfaces of both sides of the arch bridge type cavity casting mold are connected to the square steel pipe secondary keel; water-swelling waterstop strips are respectively arranged on the upper and lower surfaces of the waterstop steel plate, and the water-swelling waterstop strip on the upper surface of the waterstop steel plate is sealed by the external waterstop belt.

9. The intelligent construction method for arch bridge type cavity composite cover plate based on BIM modeling according to claim 7 is characterized in that: The specific construction steps are: use the BIM model to simulate and emulate to generate the required structure and size, then assemble the components, mark the installation position at the construction site, build the socket-type disc buckle support frame, install the adjustable bracket to the top of the disc buckle upright on the socket-type disc buckle support frame, and adjust the position of the socket sleeve and the disc buckle upright to make each adjustable bracket reach the corresponding design elevation; fix the load-bearing beam to the adjustable bracket at the lowest position, and a group of steel pipe keels on the adjustable bracket at the lowest position are arranged horizontally side by side; then hoist the flat steel main keel onto the adjustable bracket, and fix the lower end of the flat steel main keel to the load-bearing beam; then install the square steel pipe secondary keel onto the flat steel main keel, and bolts pass through the circular holes on the side to connect the curved keel plate with the belt The ear plate of the ear plate square steel pipe is fixed; then the arch bridge type cavity casting mold is erected on the square steel pipe secondary keel, and fixed to the square steel pipe secondary keel by the three-stage water-stop tension screw, and then the connection gap between the arch bridge type cavity casting mold and the square steel pipe secondary keel is sealed with weather-resistant sealant to form a sealing area; then the axil plate support frame is installed in the erected arch bridge type cavity casting mold to make the wooden square formwork fully contact and support the bottom support-free steel plate and the middle steel truss structure; then the construction joint between the outer surfaces on both sides of the arch bridge type cavity casting mold and the square steel pipe secondary keel is sealed by the construction joint combined waterproof structure; after completing all the processes and checking that the installation is in place, the arch bridge type cavity casting mold is cast to complete the intelligent construction of the finalized arch bridge type cavity composite cover plate.

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