Spliced formwork steel arch bridge and construction method

Abstract

The application relates to the technical field of bridge manufacturing, in particular to a spliced steel-concrete arch bridge and a construction method. The spliced steel-concrete bridge comprises an inclined edge foundation, a main foundation platform, a top arc surface surrounding plate, a bottom arc surface surrounding plate and a side edge baffle. First, an operator pours the inclined edge foundation platform on both sides in a tunnel, then overlaps the prefabricated plate by using the overlapping clamping surface on the inclined edge foundation platform, and then overlaps the main foundation platform on both sides of the prefabricated plate. After the arch-shaped mold is built above the main foundation platform, the complete arch-shaped bridge top is poured by using the arch-shaped mold and the internal steel structure. The waterway channel can be formed below the prefabricated plate. Meanwhile, the connecting structure of the top arc surface surrounding plate can guarantee that the arch bridge top can be conveniently demolded and moved after being disassembled, so that the mold waste and the appearance of the top hole are avoided, the spliced steel-concrete arch bridge has good practicability and economy, and is beneficial to the promotion and use of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge manufacturing, and particularly relates to a spliced formwork steel-concrete arch bridge and a construction method. BACKGROUND

[0002] In the process of tunnel construction, a double-layer buried corrugated plate steel-concrete combined arch bridge, i.e., a bottom drainage, a middle driving, a pedestrian passage and a top arch bridge support, is usually used to solve the problem of diversion operation of waterways and highways in the tunnel. The top of the arch bridge formed in the tunnel is usually poured and fixed by using a formwork for segmented splicing and lengthening. The top of the arch bridge is close to the top end of the tunnel. In the implementation process, the pouring process usually needs to be combined with vibration for compaction treatment. At the same time, since the grouting hole is usually arranged at the bottom of the arch bridge formwork, part of the water is caused to be analyzed due to vibration at the top of the arch bridge, thereby causing cavities. Long-term use will corrode the top of the bridge and affect the quality of the arch bridge. At the same time, in the formwork removal process, the contact surface between the formwork at the top of the arch bridge and the arch bridge below is large, and is usually connected by bolts. The removal space is insufficient, and sometimes it is impossible to remove, thereby causing waste of the formwork. The arch bridge at the splicing end is also prone to water leakage due to the splicing gap. SUMMARY

[0003] In order to solve the above problems existing in the prior art, the present application aims to provide a spliced formwork steel-concrete arch bridge and a construction method, which has a simple structure, simplifies the formwork removal process, effectively avoids the cavity problem caused by grouting and vibration, and prevents water leakage at the splicing end.

[0004] The technical scheme adopted by the present application is as follows: a spliced formwork steel-concrete arch bridge, comprising symmetrically arranged inclined edge foundation tables, the table surfaces of the inclined edge foundation tables are provided with L-shaped overlapping clamping surfaces, a prefabricated plate is overlapped between the overlapping clamping surfaces of the two inclined edge foundation tables, main foundation tables are built on both sides of the prefabricated plate close to the inclined edge foundation tables, a pouring plane is arranged on the side of the main foundation table away from the prefabricated plate, and an arch-shaped mold is arranged on the pouring plane of the main foundation table on both sides of the prefabricated plate to pour an arch-shaped concrete structure.

[0005] The arch-shaped mold comprises an outer arc cover formwork and an inner arc cover formwork. One side of the outer arc cover formwork and the inner arc cover formwork comprises a plurality of arc-shaped side edge baffles. The plurality of arc-shaped side edge baffles are sequentially connected by bolts to form an arc ring plate structure. The other side of the outer arc cover formwork and the inner arc cover formwork is provided with a plurality of movable arc-shaped plates abutting on each other to form an arc-shaped ring plate. The movable arc-shaped plate comprises a plurality of arc-shaped blocks sequentially expanding from the center point of the arc-shaped plate. The side of the arc-shaped block away from the arc-shaped side edge baffle is provided with an arc-shaped groove. The bottom of the arc-shaped groove is provided with a plurality of through holes penetrating the arc-shaped block. A soft rubber taper is arranged in the through hole. A taper-shaped through groove penetrating the soft rubber taper is arranged in the middle of the soft rubber taper.

[0006] In an embodiment, several of the arc-shaped blocks slide along the active arc-shaped plate center point axis, in turn approaching the arc-shaped side edge stoppers on the other side of the outer arc cover template and the inner arc cover template.

[0007] In an embodiment, the outer arc cover template comprises several top arc surface surrounding plates constituting the arc-shaped plate structure, the abutting ends of the top arc surface surrounding plates are respectively provided with first inclined rib plates and second inclined rib plates, the top arc surface surrounding plates abut the second inclined rib plates of adjacent top arc surface surrounding plates obliquely, and a plurality of side rib plates are arranged between the first inclined rib plates and the second inclined rib plates of the top arc surface surrounding plates to strengthen the arc-shaped structure of the top arc surface surrounding plates.

[0008] In an embodiment, the middle part of the first inclined rib plate is provided with a plurality of longitudinally arranged transverse grooves parallel to the junction edge line of the side rib plate and the first inclined rib plate, the middle part of the second inclined rib plate is provided with a plurality of linearly arranged transverse grooves, the projection of the abutting surface of the second inclined rib plate is perpendicular to the adjacent longitudinal transverse groove, a buckle block is further arranged in the longitudinal transverse groove, the buckle block has an L-shaped structure, one end of the buckle block penetrates into the longitudinal transverse groove, the other end penetrates into the adjacent transverse groove, the short rod of one buckle block is hung on the side of the second inclined rib plate away from the abutting surface, a fixing rod is arranged at the end of the buckle block away from the second inclined rib plate, the fixing rod penetrates through the buckle block, and the fixing rod is arranged on the side of the first inclined rib plate away from the second inclined rib plate and does not abut the first inclined rib plate.

[0009] In an embodiment, the two ends of the first inclined rib plate are further provided with a plurality of connecting screws, the connecting screws penetrate and threadedly connect the first inclined rib plate, and the threaded ends of the connecting screws abut the adjacent second inclined rib plates.

[0010] In an embodiment, the inner arc cover template comprises several bottom arc surface surrounding plates abutting each other to form an arc-shaped plate, the peripheral side of the bottom arc surface surrounding plate is provided with an edge support rib plate to strengthen the arc-shaped structure of the bottom arc surface surrounding plate, and the inner concave side of the bottom arc surface surrounding plate is provided with a grouting pipe penetrating through the bottom arc surface surrounding plate to grout in the arched mold.

[0011] In an embodiment, the top arc surrounding plate away from the prefabricated plate is also provided with a rectangular material channel at both ends, the material channel is provided on both sides of the top end of the arch-shaped mold, the side away from the inner cavity of the arch-shaped mold is provided with a trapezoidal box, the trapezoidal box is in a flared trapezoidal box structure, the flared end of the trapezoidal box is movably connected with the top arc surrounding plate, the inner cavity of the trapezoidal box is provided with a turnover plate, the turnover plate is connected with the material channel and movably adheres to the inside of the material channel, both ends of the turnover plate are provided with a rotating connecting shaft, the rotating connecting shaft and the turnover plate are connected through a rotating connecting plate, the rotating connecting shaft is fixedly connected with the inner cavity wall of the trapezoidal box, the middle part of the turnover plate is also provided with a plurality of movable rectangular blocks, the middle part of the movable rectangular block is provided with a through rectangular slot, a rotating shaft is arranged between the trapezoidal box and the turnover plate, the rotating shaft is provided with the same number of extension blocks as the movable rectangular blocks, one end of the extension block away from the rotating shaft is provided with a push block, the push block is connected with the rectangular slot of the adjacent movable rectangular block, and both ends of the rotating shaft are rotatably connected with the trapezoidal box.

[0012] In an embodiment, the two side plates through which the trapezoidal box is penetrated can be detached.

[0013] In an embodiment, the method also comprises a splicing formwork steel arch bridge construction method, and the specific implementation method is as follows:

[0014] S1. First, pour the inclined edge foundation table on both sides of the tunnel, then build the prefabricated plate between the two groups of inclined edge foundation tables, then pour the lap joint surface on both sides of the prefabricated plate to support, then build the arch-shaped mold and the internal steel structure above the lap joint surfaces on both sides, and the arc-shaped side baffle and the movable arc-shaped plate on both sides;

[0015] S2. After adjusting the movable arc-shaped plate to a ladder-shaped structure, fixing by using bolts, inserting steel bars into the soft rubber cone, and fixing by using wire, the steel bars are perpendicular to the plane of the arc-shaped block;

[0016] S3. After pumping the concrete into the inner cavity of the arch-shaped mold through the grouting pipe, vibrating and grouting, rotating the rotating shaft to open the turnover plate inside the trapezoidal box material channel to make part of the concrete or liquid flow into the trapezoidal box;

[0017] S4. Continue to vibrate, and rotate the rotating shaft to close the turnover plate to block the material channel;

[0018] S5. Then, after the concrete solidifies, move the outer arc formwork and the inner arc formwork away from the extension direction of the steel bars of the arc-shaped block, continue to build the arch-shaped mold and the internal steel structure, and the arc-shaped side baffle and the movable arc-shaped plate on both sides;

[0019] S6. Repeat the above steps S2-S5 until the completion of the tunnel inside the arch bridge construction, complete the construction.

[0020] In one embodiment, after step S4 is completed, the side plates on both sides of the trapezoidal box are disassembled, the excess concrete in the trapezoidal box is removed, and the trapezoidal box is disassembled from the top arc surface surrounding plate.

[0021] The present application has the advantages that the present application is a simple structure, simplifies the formwork disassembly process, effectively avoids the void problem of grouting and vibrating, and prevents the splicing joint of the splicing end from leaking water.

[0022] First, the inclined edge foundation platform of the tunnel bottom is poured, and the prefabricated plate is erected between the two groups of inclined edge foundation platforms. At this time, water flow can be carried out below the prefabricated plate. Then, the main foundation platform is placed on both ends of the prefabricated plate, and the arch-shaped formwork is erected above the main foundation platform on both sides of the prefabricated plate to facilitate pouring. During the erection process, steel structures such as scaffolding can be used to assist construction to prevent the arch-shaped formwork from deforming. Then, the steel reinforcement structure inside the arch-shaped formwork is supported to assist the lifting of the arch-shaped top after pouring to improve the strength.

[0023] The outer arc formwork is connected by movable clamping. After the clamping block passes through the longitudinal transverse groove from the abutting surface of the first inclined rib plate, it continues to pass through the transverse groove in the second inclined rib plate on the adjacent top arc surface surrounding plate. Then, the first inclined rib plate is moved horizontally, so that the L-shaped bend of the clamping block is hung on the transverse groove. At this time, the adjacent first inclined rib plate and the second inclined rib plate are also in abutment. After the connection is completed in the above manner, the outer arc formwork in the shape of an arc is formed by connecting a plurality of top arc surface surrounding plates. At the same time, release agent is applied to the inner arc formwork, and the contact surfaces of the concrete in other pouring areas are also coated in the same way.

[0024] The inner arc formwork is directly connected in the shape of an arc by a plurality of bottom arc surface surrounding plates. Since the inner arc formwork is close to the prefabricated plate and has sufficient area, it can be directly supported by steel reinforcement scaffolding and bolts. When disassembled, the difficulty is greatly reduced compared to the outer arc formwork. Therefore, it is not necessary to use the inclined surface sliding connection structure of the outer arc formwork.

[0025] After completion, the outer arc formwork and the inner arc formwork are respectively closed on both sides by using the arc-shaped side stop plate and the arc-shaped block, and are supported and fixed at the same time to prevent the outer arc formwork at the top from being bent. At the same time, the steel reinforcement is inserted into the soft rubber cone of the arc-shaped block and tied with wire mesh, so that the steel reinforcement is parallel to the plane of the arc-shaped block. Adjusting the gradient movement of the plurality of arc-shaped blocks and fixing them facilitates the pouring and solidification of the gradient side surface and the reserved extension steel reinforcement, which facilitates the close fit of the concrete arch bridge of the splicing section to prevent water leakage. The soft rubber cone filled with concrete can also be detached due to the flexibility of the soft rubber cone.

[0026] After the formwork is completed, grouting is carried out by using a grouting pipe, and at the same time, vibration is carried out to prevent the arch-shaped formwork partial area from being hollowed due to the support effect of the grouting position and the internal steel plate. When grouting to the top, due to long-time grouting, part of the water in the concrete is separated out, which causes the concrete to be weak in strength or the arch-shaped top part of the poured arch bridge to have a hollow phenomenon. In order to avoid the above problems, the rotating shaft is rotated to drive the push block below the extension block to slide in the movable rectangular block. At the same time, the push movable rectangular block and the turnover plate are rotated along the connecting direction of the rotating connecting shaft on the rotating connecting plate, so that the opening leading to the inner cavity of the trapezoidal box appears on the top of the outer arc formwork. Then, due to the water in the internal grouting area being separated out and floating, it flows into the trapezoidal box through the feeding groove. Then, grouting is continued while the rotating shaft is slowly rotated in the reverse direction to close the gap between the turnover plate and the feeding groove. In this way, the high-strength concrete can be used to fill all areas to the maximum extent. After completion, the side plates on both sides of the trapezoidal box can be disassembled to clean the liquid or weak concrete slurry in the trapezoidal box. After the concrete is dry, it can be used.

[0027] After the concrete is completed, the demolding process can be carried out: first, the arc-shaped side stop plates and the arc-shaped blocks on both sides of the outer arc formwork and the inner arc formwork are disassembled. After the bottom arc surface surrounding plate is disassembled, the connecting screw rod on the top arc surface surrounding plate is rotated. The connecting screw rod drives the first inclined rib plate to move away from the second inclined rib plate to perform edge lifting. Then, due to the edge lifting, the top arc surface surrounding plate is quickly lifted to separate from the poured arch bridge. Since the first inclined rib plate and the second inclined rib plate adopt a connecting mode of abutting against each other at an inclined surface, the problem of difficulty in disassembly caused by friction at the abutting surface during disassembly is effectively avoided. At the same time, during the edge lifting of the first inclined rib plate, the long rod end of the buckling block moves to below the longitudinal transverse groove, so that the fixed rod is close to or abuts against the first inclined rib plate. At this time, the second inclined rib plate of the adjacent top arc surface surrounding plate and the first inclined rib plate produce an active gap, so that the second inclined rib plate can be moved horizontally to make the bent end of the buckling block pass through the transverse groove, and the connection between the two groups of top arc surface surrounding plates is disconnected. Then, the top arc surface surrounding plate is pulled to move in the direction of the reserved extension steel bar, and is fixed. The inner arc formwork below is re-built, and the reserved gradient side surface and the reserved steel bar serve as the arc-shaped side stop plates of the new steel-concrete arch bridge to improve the contact area of the concrete pouring and avoid water leakage. At the same time, the arc-shaped block is repeatedly built, so that the arch bridge pouring of the next section can be carried out.

[0028] The structure effectively realizes quick demolding through the inclined surface connection of the top arc surface surrounding plate, effectively simplifies the demolding difficulty, and uses the feeding groove of the side rib plate on the top surface to process the separated liquid and low-strength concrete after vibration. The gradient reservation and steel reinforcement are also used in the splicing section to improve the contact area of the contact surface to prevent water leakage at the joint. The structure has good practicability and economy, and is beneficial to the promotion and use of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0029] The application will be described in further detail below with reference to the drawings and specific implementation methods.

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0031] Figure 2 is a schematic diagram of the three-dimensional structure of the application;

[0032] Figure 3 is a schematic diagram of the three-dimensional structure of the application;

[0033] Figure 4 is a schematic diagram of the three-dimensional structure of the application;

[0034] Figure 5 is a schematic diagram of the three-dimensional structure of the application;

[0035] Figure 6 is a schematic diagram of the three-dimensional structure of the application;

[0036] Figure 7 is a schematic diagram of the three-dimensional structure of the application;

[0037] Figure 8 is a schematic diagram of the three-dimensional structure of the application;

[0038] Figure 9 is a schematic diagram of the three-dimensional structure of the application;

[0039] Figure 10 is a schematic diagram of the three-dimensional structure of the application;

[0040] Figure 11 is a schematic diagram of the three-dimensional structure of the application;

[0041] Figure 12 is a schematic diagram of the three-dimensional structure of the application;

[0042] Reference signs: 1, bevel foundation platform; 12, overlap card surface; 13, prefabricated plate; 2, main foundation platform; 21, pouring plane; 3, top arc surface surrounding plate; 301, buckling block; 302, fixed rod; 31, side muscle plate; 32, first inclined muscle plate; 3201, connecting screw; 321, longitudinal transverse groove; 33, second inclined muscle plate; 331, transverse groove; 34, trapezoidal box; 35, rotating shaft; 351, extension block; 352, push block; 36, movable rectangular block; 361, rectangular groove; 37, turnover plate; 371, rotating connecting shaft; 372, rotating connecting plate; 373, material channel; 4, bottom arc surface surrounding plate; 41, edge support muscle plate; 42, grouting pipe; 51, arc-shaped side edge baffle; 52, arc-shaped block; 521, arc-shaped groove; 5211, through hole; 53, soft rubber cone; 531, conical through groove. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application, that is, the described examples are only a part of the examples of the present application, but not all the examples. The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0045] The specific embodiments of the present application will be described below in combination with Figures 1-12 A spliced formwork steel arch bridge: including symmetrically arranged bevel foundation platforms 1, as shown in the drawings, presenting a trapezoidal platform structure, the platform surface of the bevel foundation platform 1 is provided with an L-shaped overlap card surface 12, the overlap card surfaces 12 between the two bevel foundation platforms 1 are overlapped with prefabricated plates 13, the L-shaped structure of the overlap card surface 12 facilitates limiting the position of the prefabricated plate 13 to prevent falling off and moving, the two sides of the prefabricated plate 13 close to the bevel foundation platform 1 are built with main foundation platforms 2 as the main support to improve the height of the arch bridge, the side of the main foundation platform 2 away from the prefabricated plate 13 is provided with a pouring plane 21, the pouring plane 21 on the main foundation platform 2 on both sides of the prefabricated plate is provided with an arch-shaped mold, which can form an arch-shaped cavity in cooperation with the pouring plane 21 for pouring the arch-shaped concrete structure;

[0046] The arched mold comprises an outer arc cladding template and an inner arc cladding template, one side of the outer arc cladding template and the inner arc cladding template comprises a plurality of arc-shaped side edge stop plates 51, the plurality of arc-shaped side edge stop plates 51 are sequentially bolted to present an arc ring plate structure, the bolt structure is not drawn in the drawing, and fixing can be carried out according to the actual situation, mainly used to block one side of the outer arc cladding template and the inner arc cladding template, the other side of the outer arc cladding template and the inner arc cladding template is provided with a plurality of movable arc-shaped plates abutting to form an arc-shaped ring plate, the movable arc-shaped plate comprises a plurality of arc-shaped blocks 52 sequentially expanding from the center point of the arc-shaped plate, the opposite curvature of the arc-shaped block 52 close to the inner arc cladding template is larger and the arc length is smaller, the side of the arc-shaped block 52 away from the arc-shaped side edge stop plate 51 is provided with an arc-shaped groove 521, the bottom of the arc-shaped groove 521 is provided with a plurality of through holes 5211 penetrating through the arc-shaped block 52, and a soft rubber taper 53 is arranged in the through hole 5211.

[0047] Beneficially, the plurality of arc-shaped blocks 52 slide along the center point axis of the movable arc-shaped plate, sequentially approach the arc-shaped side edge stop plate 51 on the other side of the outer arc cladding template and the inner arc cladding template, present a stepped structure, and then can be fixed through bolts or other ways, after the internal pouring area is dry, the stepped texture and exposed auxiliary steel bars can be generated, at the same time, the drawing adopts an exaggerated drawing method, the actual stepped width is smaller, and the internal steel structure cannot be filled in this area.

[0048] Beneficially, the outer arc cladding template comprises a plurality of top arc surface surrounding plates 3 forming an arc plate structure, the abutting ends of the top arc surface surrounding plates 3 are respectively provided with first inclined rib plates 32 and second inclined rib plates 33, the top arc surface surrounding plates 3 are obliquely abutted to the second inclined rib plates 33 of adjacent top arc surface surrounding plates 3 along the inclined direction, the first inclined rib plates 32 and the second inclined rib plates 33 of the top arc surface surrounding plates 3 are sequentially pressed, and a plurality of side rib plates 31 abutting the periphery side of the top arc surface surrounding plates 3 are arranged between the first inclined rib plates 32 and the second inclined rib plates 33 of the top arc surface surrounding plates 3, the specific number can be changed according to the length of the top arc surface surrounding plates 3, mainly used to improve the strength, and the side rib plates 31 are used to strengthen the arc-shaped structure of the top arc surface surrounding plates 3.

[0049] Specifically, the first inclined rib plate 32 is provided with a plurality of longitudinally arranged transverse grooves 321 in the middle part, the transverse grooves 321 are parallel to the connecting edge of the side rib plate 31 and the first inclined rib plate 32, the second inclined rib plate 33 is provided with a plurality of linearly arranged transverse grooves 331 in the middle part, the projection of the transverse groove 331 on the abutting surface of the second inclined rib plate 33 is perpendicular to the adjacent longitudinal transverse groove, the longitudinal transverse groove 321 is further provided with a buckling block 301, the buckling block 301 has an L-shaped structure, one end of the buckling block 301 penetrates into the longitudinal transverse groove 321, the other end penetrates into the adjacent transverse groove 331, and the short rod of the buckling block 301 is hung on the side of the second inclined rib plate 33 away from the abutting surface, during installation, the buckling block 301 is first rotated by 90 degrees after penetrating through the longitudinal transverse groove 321, and then is fixed by the fixing rod 302, and then the buckling block 301 is moved transversely to the second inclined rib plate 33 after penetrating through the transverse groove 331, so that the buckling is completed, the end of the buckling block 301 away from the second inclined rib plate 33 is provided with a fixing rod 302, the fixing rod 302 penetrates through the buckling block 301, and the fixing rod 302 is arranged on the side of the first inclined rib plate 32 away from the second inclined rib plate 33 and does not abut against the first inclined rib plate 32, through the above structure, the connection area can be reduced, and the top arc surface surrounding plate 3 is prevented from being separated.

[0050] Beneficially, the first inclined rib plate 32 is further provided with a plurality of connecting screws 3201 at both ends, the connecting screws 3201 penetrate and threadedly connect the first inclined rib plate 32, and the threaded end of the connecting screw 3201 abuts against the adjacent second inclined rib plate 33.

[0051] Beneficially, the inner arc formwork plate includes a plurality of bottom arc surface surrounding plates 4 abutting against each other to form an arc-shaped plate, the outer peripheral side of the bottom arc surface surrounding plate 4 is provided with an edge support rib plate 41 for strengthening the arc-shaped structure of the bottom arc surface surrounding plate 4, and the inner concave side of the bottom arc surface surrounding plate 4 is provided with a grouting pipe 42 penetrating through the bottom arc surface surrounding plate 4 for grouting in the arched mold, specifically, the above formwork plate is supported by a steel pipe or other lap joint structure during construction, and riveting can be performed according to actual conditions when necessary, and the formwork plate maintaining the arc-shaped cavity can be used;

[0052] Beneficial, away from the top arc surrounding plate 3 of prefabricated plate 13 two ends are also provided with rectangular material channel 373, material channel 373 is provided with trapezoidal box 34 away from the two sides of the top of the arch mold cavity, trapezoidal box 34 is presented to the flared trapezoidal box 34 structure, the flared end of trapezoidal box 34 is movably connected to the top arc surrounding plate 3, for example, bayonet connection or bolt connection, according to the actual situation, can be easily disassembled, not drawn in the drawing, trapezoidal box 34 cavity is provided with turnover plate 37, turnover plate 37 is connected to and movably attached to the material channel 373, both ends of the turnover plate 37 are provided with a rotating shaft 371, the rotating shaft 371 is connected between the rotating shaft 371 and the turnover plate 37, the rotating shaft 371 is fixedly connected to the inner cavity wall of the trapezoidal box 34, the turnover plate 37 is further provided with a plurality of movable rectangular blocks 36, the movable rectangular blocks 36 are provided with a through rectangular slot 361, the trapezoidal box 34 and the turnover plate 37 are provided with a rotating shaft 35, the rotating shaft 35 is provided with the same number of extension blocks 351 as the movable rectangular blocks 36, the extension blocks 351 are provided with a push block 352 away from the rotating shaft 35, the push block 352 is connected to and slidably connected to the rectangular slot 361 of the adjacent movable rectangular block 36, the rotating shaft 35 is connected to the trapezoidal box 34, specifically, the two sides of the trapezoidal box 34 penetrated by the rotating shaft 35 can be disassembled, which is convenient for cleaning the concrete slurry in the trapezoidal box 34.

[0053] Beneficially, it also includes a kind of splicing formwork steel arch bridge construction method, specific implementation method is as follows:

[0054] S1. First, the inclined edge foundation platform 1 on both sides of the tunnel is poured, the prefabricated plate 13 is built between the two inclined edge foundation platforms 1, the lap joint clamping surface 12 is poured on both sides of the prefabricated plate 13 to support, the arch-shaped mold and the internal steel structure are built above the lap joint clamping surface 12 on both sides, and the arc-shaped side baffle 51 and the movable arc-shaped plate on both sides are built;

[0055] S2. After adjusting the movable arc-shaped plate to present a ladder-shaped structure, it is fixed by using bolts, then the steel bars are inserted into the soft rubber cone 53, and the steel bars are fixed by using wire, to ensure that the steel bars are perpendicular to the plane of the arc-shaped block 52;

[0056] S3. After pumping concrete into the inner cavity of the arch-shaped mold through the grouting pipe 42, vibrating and grouting are carried out, and at the same time, the rotating shaft 35 is rotated to open the turnover plate 37 inside the trapezoidal box 34 material channel 373, so that part of the concrete or liquid flows into the trapezoidal box 34;

[0057] S4. Continue to vibrate, and at the same time, rotate the rotating shaft 35 to close the turnover plate 37 to block the material channel 373;

[0058] S5. After waiting for the concrete to solidify, the outer arc formwork and the inner arc formwork are moved in the extension direction of the reinforcement of the arc block 52, the arch-shaped mold and the internal reinforcement structure are continued to be built, and the arc-shaped side baffle 51 and the movable arc-shaped plate on both sides are continued to be built;

[0059] S6. The steps S2-S5 are repeated until the construction of the tunnel arch bridge is completed.

[0060] Beneficially, after the step S4 is completed, the side plates on both sides of the trapezoidal box 34 are disassembled, the excess concrete in the trapezoidal box 34 is removed, and the trapezoidal box 34 is disassembled from the top arc surface surrounding plate 3.

[0061] The working principle of the present application is as follows:

[0062] Firstly, the inclined edge foundation table 1 of the tunnel bottom is poured, and the prefabricated plate 13 is built between the two groups of inclined edge foundation tables 1. At this time, the water flow under the prefabricated plate 13 can be carried out. Then, the main foundation table 2 is placed on both ends of the built prefabricated plate 13, and the arch-shaped formwork is built above the main foundation table 2 on both sides of the prefabricated plate to facilitate pouring. In the building process, steel structures such as scaffolding can be used to assist construction to prevent the arch-shaped formwork from deforming. Then, the reinforcement structure is supported in the arch-shaped formwork to assist the lifting strength of the poured arch-shaped top:

[0063] The outer arc formwork is connected by movable clamping. After the buckling block 301 is passed through the longitudinal transverse groove 321 on the abutting surface of the first inclined rib plate 32, it is further passed through the transverse groove 331 in the second inclined rib plate 33 on the adjacent top arc surface surrounding plate 3. The first inclined rib plate 32 is moved transversely, so that the L-shaped bend of the buckling block 301 is hung on the transverse groove 331. At this time, the adjacent first inclined rib plate 32 and the second inclined rib plate 33 also complete the abutment. After the connection is completed in sequence, the outer arc formwork in the shape of arc formed by the connection of multiple top arc surface surrounding plates 3 is formed. At the same time, release agent is applied in the outer arc formwork, and the contact surfaces of the concrete in other pouring areas are also applied in the same way.

[0064] The inner arc formwork is directly connected into an arc-shaped plate structure by multiple bottom arc surface surrounding plates 4. Since the inner arc formwork is close to the prefabricated plate 13 and the area is sufficient, it can be directly supported by steel reinforcement scaffolding and bolts. When disassembled, the difficulty is greatly reduced compared with the outer arc formwork, so it is not necessary to use the inclined surface sliding connection structure of the outer arc formwork.

[0065] After completion, the outer arc package template and the inner arc package template are closed and supported by arc-shaped side baffles 51 and arc-shaped blocks 52, respectively, to prevent the outer arc package template at the top from bending. Steel bars are inserted into the soft rubber cone 53 of the arc-shaped block 52 and tied with wire mesh, so that the steel bars are parallel to the plane of the arc-shaped block 52. Adjusting multiple sets of arc-shaped blocks 52 to produce gradient movement and fixation facilitates the pouring and solidification of the gradient side and the reserved extension steel bars, which facilitates the close fit of the concrete arch bridge of the spliced segment to prevent water leakage. The soft rubber cone 53 can also be detached due to the toughness of the soft rubber cone 53.

[0066] After the formwork is completed, grouting is performed using the grouting pipe 42, and vibration is performed to prevent the arch-shaped template from being hollow due to the support effect of the grouting position and the internal steel plate. When grouting to the top, the water in the concrete is partially separated due to long-term grouting, resulting in weak concrete strength or hollow phenomenon of the arch-shaped top after pouring. To avoid the above problems, the rotating shaft 35 is rotated, driving the push block 352 below the extension block 351 to slide in the movable rectangular block 36. At the same time, the movable rectangular block 36 and the turnover plate 37 are rotated along the connection direction of the rotating connection shaft 371 on the rotating connection plate 372, so that an opening is formed on the top of the outer arc package template leading to the cavity of the trapezoidal box 34. After that, the water in the internal grouting area is floated and flows into the trapezoidal box 34 through the material chute 373. Then, continue grouting while slowly rotating the rotating shaft 35 in reverse to close the gap between the turnover plate 37 and the material chute 373. This can maximize the filling of all areas with high-strength concrete. After completion, the side plates on both sides of the trapezoidal box 34 can be removed to clean the liquid or weakened concrete slurry in the trapezoidal box 34. Wait for the concrete to dry.

[0067] After the concrete is completed, the demolding treatment can be carried out: firstly, the arc-shaped side baffle 51 and the arc-shaped block 52 on both sides of the outer arc formwork and the inner arc formwork are disassembled, the bottom arc surrounding plate 4 is disassembled, the connecting screw rod 3201 on the top arc surrounding plate 3 is rotated, the first inclined rib plate 32 is pushed away from the second inclined rib plate 33 to be warped, and then the top arc surrounding plate 3 is quickly warped and separated from the cast arch bridge due to the influence of warping. Since the first inclined rib plate 32 and the second inclined rib plate 33 adopt the connecting mode of inclined surface abutment, the problem of disassembly difficulty caused by friction of the abutment surface in the disassembly process is effectively avoided. At the same time, in the process of warping the first inclined rib plate 32, the long rod end of the buckle block 301 moves to the lower side of the longitudinal transverse groove 321, so that the fixed rod 302 is close to or abuts against the first inclined rib plate 32. At this time, the second inclined rib plate 33 of the adjacent top arc surrounding plate 3 produces an active gap between the first inclined rib plate 32, so that the second inclined rib plate 33 is moved transversely to make the bent end of the buckle block 301 pass through the transverse groove 331, and the connection of the two groups of top arc surrounding plates 3 is disconnected. Then, the top arc surrounding plate 3 is pulled to the direction of the reserved extension steel bar and fixed, the inner arc formwork is re-built below, the gradient side and the reserved steel bar are used as the arc-shaped side baffle 51 of the new steel-concrete arch bridge, the contact area of the concrete pouring is improved, water leakage is avoided, and the construction of the arc-shaped block 52 is repeated, so that the arch bridge pouring of the next section can be carried out.

[0068] In the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] The above is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the invention or the scope defined by the claims of the invention, which shall belong to the protection scope of the present application.

Claims

1. A spliced formwork steel arch bridge, characterized in that: The application relates to a foundation platform for building an arch-shaped concrete structure, which comprises two symmetrically arranged bevel foundation platforms (1), the platform top of each bevel foundation platform (1) is provided with an L-shaped overlapping clamping surface (12), a prefabricated plate (13) is overlapped between the overlapping clamping surfaces (12) of the two bevel foundation platforms (1), a main foundation platform (2) is arranged on the two sides of the bevel foundation platform (1) close to the prefabricated plate (13), a pouring plane (21) is arranged on the side of the main foundation platform (2) far from the prefabricated plate (13), and an arch-shaped mold is arranged on the pouring plane (21) of the main foundation platform (2) on the two sides of the prefabricated plate, so as to pour the arch-shaped concrete structure. The arch-shaped mold comprises an outer arc clamping plate and an inner arc clamping plate, one side of the outer arc clamping plate and the inner arc clamping plate comprises a plurality of arc-shaped side edge baffles (51), the arc-shaped side edge baffles (51) are sequentially bolted to form an arc ring plate structure, the other side of the outer arc clamping plate and the inner arc clamping plate is provided with a plurality of movable arc-shaped plates abutting to form an arc-shaped ring plate, the movable arc-shaped plate comprises a plurality of arc-shaped blocks (52) sequentially expanding from the center point of the arc-shaped plate, one side of the arc-shaped block (52) far from the arc-shaped side edge baffle (51) is provided with an arc-shaped groove (521), the bottom of the arc-shaped groove (521) is provided with a plurality of through holes (5211) penetrating through the arc-shaped block (52), and a soft rubber taper (53) is arranged in the through hole (5211).

2. The spliced formwork steel arch bridge according to claim 1, characterized in that: The plurality of arc-shaped blocks (52) slide along the center point axis of the movable arc-shaped plate and sequentially approach the arc-shaped side edge baffles (51) on the other side of the outer arc clamping plate and the inner arc clamping plate.

3. The spliced formwork steel arch bridge according to claim 1, characterized in that: The outer arc clamping plate comprises a plurality of top arc surface surrounding plates (3) forming an arc-shaped plate structure, the abutting end of the top arc surface surrounding plate (3) is respectively provided with a first inclined rib plate (32) and a second inclined rib plate (33), the top arc surface surrounding plate (3) is obliquely abutted with the second inclined rib plate (33) of the adjacent top arc surface surrounding plate (3), a plurality of side rib plates (31) are arranged between the first inclined rib plate (32) and the second inclined rib plate (33) of the top arc surface surrounding plate (3) and abut the periphery side of the top arc surface surrounding plate (3), and the side rib plate (31) is used for strengthening and supporting the arc-shaped structure of the top arc surface surrounding plate (3).

4. The spliced formwork steel arch bridge according to claim 3, characterized in that: The middle part of the first inclined rib plate (32) is provided with a plurality of arrayed longitudinal transverse grooves (321) parallel to the connecting edge line of the side rib plate (31) and the first inclined rib plate (32), and the middle part of the second inclined rib plate (33) is provided with a plurality of linear arrayed transverse grooves (331), the projection of the abutting surface of the second inclined rib plate (33) is perpendicular to the adjacent longitudinal transverse groove (321), and the longitudinal transverse groove (321) is further provided with a buckling block (301), the buckling block (301) has an L-shaped structure, one end of the buckling block (301) penetrates into the longitudinal transverse groove (321), and the other end penetrates into the adjacent transverse groove (331), one buckling block (301) has a short rod hanging on the side of the second inclined rib plate (33) away from the abutting surface, and the end of the buckling block (301) away from the second inclined rib plate (33) is provided with a fixing rod (302), the fixing rod (302) penetrates through the buckling block (301), and the fixing rod (302) is arranged on the side of the first inclined rib plate (32) away from the second inclined rib plate (33) and does not abut against the first inclined rib plate (32).

5. The spliced formwork steel arch bridge according to claim 3, characterized in that: The two ends of the first inclined rib plate (32) are further provided with a plurality of connecting screws (3201), the connecting screws (3201) penetrate and threadedly connect the first inclined rib plate (32), and the threaded end of the connecting screw (3201) abuts against the adjacent second inclined rib plate (33).

6. The spliced formwork steel arch bridge according to claim 4, characterized in that: The inner arc formwork panel comprises a plurality of arc-shaped panels abutting against each other, and the outer periphery of the arc-shaped panel (4) is provided with an edge support rib plate (41) to strengthen the arc structure of the arc-shaped panel (4), and the inner concave side of the arc-shaped panel (4) is provided with a grouting pipe (42) penetrating through the arc-shaped panel (4) to grout in the arched mold.

7. The spliced formwork steel arch bridge according to claim 6, characterized in that: The two ends of the top arc surrounding plate (3) away from the prefabricated plate (13) are also provided with a rectangular material channel (373), which is arranged on both sides of the top end of the arch-shaped mold, and a trapezoidal box (34) is arranged on the side of the material channel (373) away from the inner cavity of the arch-shaped mold. The trapezoidal box (34) is in the form of a flared trapezoidal box (34) structure, the flared end of the trapezoidal box (34) is movably connected to the top arc surrounding plate (3), the inner cavity of the trapezoidal box (34) is provided with a turnover plate (37), the turnover plate (37) extends into and movably abuts against the material channel (373), both ends of the turnover plate (37) are provided with a rotating connecting shaft (371), and a rotating connecting plate (372) is arranged between the rotating connecting shaft (371) and the turnover plate (37). The rotating connecting shaft (371) is fixedly connected to the inner cavity wall of the trapezoidal box (34) near the trapezoidal box (34). The turnover plate (37) is further provided with a plurality of movable rectangular blocks (36) in the middle part. The middle part of the movable rectangular block (36) is provided with a through rectangular groove (361). A rotating shaft (35) is arranged between the trapezoidal box (34) and the turnover plate (37). The rotating shaft (35) is provided with the same number of extension blocks (351) in the middle part as the movable rectangular blocks (36). One end of the extension block (351) away from the rotating shaft (35) is provided with a push block (352). The push block (352) extends into and slidably connects to the rectangular groove (361) of the adjacent movable rectangular block (36). The rotating shaft (35) penetrates and rotatably connects to the trapezoidal box (34) at both ends.

8. The spliced formwork steel arch bridge according to claim 7, characterized in that: The two side plates of the trapezoidal box (34) penetrated by the rotating shaft (35) are detachable.

9. A method for constructing a spliced steel-concrete arch bridge, using the spliced steel-concrete arch bridge as claimed in claim 8, characterized in that: The specific implementation method is as follows: S1. First, pour the inclined edge foundation platform (1) on both sides of the tunnel, then build the prefabricated plate (13) between the two groups of inclined edge foundation platforms (1), then pour the lap joint clamping surface (12) on both sides of the prefabricated plate (13) for support, and then build the arch-shaped mold and the internal steel structure, the arc-shaped side baffle (51) and the movable arc-shaped plate on both sides above the lap joint clamping surface (12); S2. After adjusting the movable arc-shaped plate to be in the form of a stepped structure, the movable arc-shaped plate is fixed by using bolts, then a steel bar is inserted into the soft rubber taper (53), and the steel bar is fixed by using a wire, so that the steel bar is perpendicular to the plane of the arc-shaped block (52); S3. After pumping the concrete into the inner cavity of the arch-shaped mold through the grouting pipe (42), the concrete is vibrated and grouted, and at the same time, the rotating shaft (35) is rotated to open the turnover plate (37) inside the material channel (373) of the trapezoidal box (34), so that part of the concrete or liquid flows into the trapezoidal box (34); S4. Continue to vibrate, and at the same time, rotate the rotating shaft (35) to close the turnover plate (37) to block the material channel (373); S5. Then, after the concrete is solidified, the outer arc formwork and the inner arc formwork are moved in the direction in which the steel bars of the arc-shaped block (52) extend, and the arch-shaped mold and the internal steel structure, the arc-shaped side baffle (51) and the movable arc-shaped plate on both sides are continuously built. S6. Repeat the above steps S2-S5 until the completion of the tunnel arch bridge construction, complete the construction.

10. The method according to claim 9, wherein: After step S4 is completed, the side plates on both sides of the trapezoidal box (34) are disassembled, the excess concrete in the trapezoidal box (34) is removed, and the trapezoidal box (34) is disassembled to separate from the top arc surface surrounding plate (3).

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