Formwork device for preformed hole of mass concrete prefabricated abutment

Abstract

The invention belongs to the technical field of highway bridge construction, and discloses a large-volume concrete prefabricated abutment preformed hole template device, which is characterized in that the plate surfaces of a large circular template and a small circular template are provided with reinforcing steel bar holes through which reinforcing steel bars penetrate, and the adjacent surfaces of the large circular template and the small circular template are adjacent inclined surfaces; the large circular templates and the small circular templates are arranged at intervals and spliced through connecting pieces to form a cylindrical template, the #-shaped support is located in the cylindrical template, and the bottom template is detachably and coaxially fixed to the bottom of the cylindrical template; the large circular templates and the small circular templates are respectively connected with the #-shaped bracket in a sliding manner through sliding pieces, and the two large circular templates and the two small circular templates are driven by corresponding hydraulic oil cylinders to be close to or far away from each other under the guiding action of the sliding pieces; the two ends of the inner wall of the small circular template are fixed to the #-shaped support through at least one detachable supporting rod. The small round die plate can be opened through the hydraulic oil cylinder, and time and labor are saved.

Description

Technical Field

[0001] The invention relates to the technical field of highway bridge construction, in particular to a prefabricated hole template device for a large-volume concrete pier. Background Art

[0002] With the continuous development of my country's infrastructure construction, the scale and complexity of highway, bridge and other projects have gradually increased, and large-volume prefabricated concrete components such as super-high piers and large-span bridges have continued to emerge. In order to meet the quality and progress requirements of on-site construction, prefabricated construction technology has been widely used in infrastructure construction. Prefabricated components need to be cast in the prefabrication site and then hoisted to the site for assembly. Their prefabrication accuracy and construction quality are directly related to the safety and durability of the entire project.

[0003] Large volume precast concrete piers are an important structural form of highway bridge engineering. The piers are precast in advance at the processing site and then transported to the construction site to shorten the on-site construction period, ensure quality, and reduce on-site wet operations. Figure 1 As shown, the split pier needs to process a reserved hole a during the pier prefabrication process, and then connect the steel pipe composite pile b with the reserved hole a to realize the assembly of the steel pipe composite pile b and the pier. The reserved hole a needs to be formed with the assistance of a reserved hole template. The reserved hole templates in the existing technology are mostly suitable for forming small-diameter holes. When they are directly applied to large-volume concrete prefabricated piers, there are problems such as low support strength and difficulty in demoulding. Summary of the Invention

[0004] The purpose of the present invention is to provide a large-volume concrete prefabricated pier reserved hole template device to address the problems of low support strength and difficulty in demoulding of the reserved hole template in the prior art, which can obtain a reserved hole with a diameter of 3 to 4 meters.

[0005] The technical solution adopted to achieve the purpose of the present invention is: A large-volume concrete prefabricated pier reserved hole template device includes a well-shaped bracket, a bottom template, two large circular templates arranged opposite to each other, and two small circular templates arranged opposite to each other, wherein: The large circular template and the small circular template are provided with steel bar holes for steel bars to pass through on their surfaces, the adjacent surfaces of the large circular template and the small circular template are adjacent inclined surfaces, the large circular template and the small circular template are spaced apart and spliced ​​together by connecting pieces to form a cylindrical template, the well-shaped bracket is located inside the cylindrical template, and the bottom template is detachably fixed coaxially to the bottom of the cylindrical template; The large circle template and the small circle template are respectively slidably connected to the cross-shaped bracket through sliding members. The two large circle templates and the two small circle templates are driven by corresponding hydraulic cylinders to move closer to or farther away from each other under the guidance of the sliding members. The adjacent inclined surface is parallel to the movement direction of the hydraulic cylinder. Both ends of the inner wall of the small circular template are fixed to the well-shaped bracket via at least one detachable support rod.

[0006] In the above technical solution, a support frame is fixed on the inner wall of the large circle template or the small circle template, and the sliding part includes a connecting arm fixed on the support frame and a slot formed on the criss-cross bracket for inserting the connecting arm, and the end of the connecting arm is fixed in the slot by a positioning mechanism.

[0007] In the above technical solution, the support rod includes an internally threaded sleeve and threaded rods connected to both ends of the internally threaded sleeve by threads, the ends of the two threaded rods are respectively assembled on the inner wall of the well-shaped bracket and the corresponding small circular template, and the internally threaded sleeve is provided with an adjustment hole for inserting a tool; Connecting ears are fixed on the inner wall of the small circle template and the well-shaped bracket. Positioning blocks are rotatably connected to the connecting ears, and the ends of the threaded rods are fixed on the corresponding positioning blocks.

[0008] In the above technical solution, the hydraulic cylinder is fixed on the cross-shaped bracket, and the end of the hydraulic rod of the hydraulic cylinder is rotatably connected to the support frame; Or the hydraulic oil cylinder is fixed on the support frame, and the end of the hydraulic rod of the hydraulic oil cylinder is rotatably connected to the well-shaped bracket.

[0009] In the above technical solution, the connecting part includes a fixing plate fixed to the edges of the large circle template and the small circle template, as well as a fixing bolt and a fixing nut. The fixing bolt passes through the fixing plate at the edges of the large circle template and the small circle template and cooperates with the fixing nut to fix the large circle template and the small circle template together.

[0010] In the above technical solution, an upper positioning slope is provided on the top of the bottom template, and a lower positioning slope is provided on the bottom of the large circle template and the small circle template. Screw holes are evenly distributed on the upper positioning slope and the lower positioning slope. The cylindrical template is fixed to the top of the bottom template by a bolt and nut structure, and a support plate is assembled on the bottom of the bottom template.

[0011] In the above technical solution, the connecting arm includes an upper connecting arm and a lower connecting arm arranged in parallel, and an oblique connecting arm fixed at the ends of the upper connecting arm and the lower connecting arm to connect the upper connecting arm. The length of the lower connecting arm is longer than that of the upper connecting arm.

[0012] In the above technical solution, the positioning mechanism includes a first positioning component and a second positioning component arranged in front and behind, the first positioning component includes a square socket arranged on two opposite side walls of the slot and a wedge-shaped pin that can be matched and inserted into the square socket, the second positioning component includes a pin hole arranged on two opposite side walls of the slot, a positioning cylinder located between the side walls of the slot, and a pin shaft passing through the pin hole and the positioning cylinder, and positioning holes extending radially along the two ends of the pin shaft are provided. The first positioning component is located at the end of the lower connecting arm, and the second positioning component is located between the lower connecting arm and the oblique connecting arm.

[0013] In the above technical solution, the positioning mechanism also includes a third positioning component, which includes a bar hole opened on both sides of the slot and a positioning pin shaft passing through the bar hole and the lower connecting arm. The first positioning component and the second positioning component prevent the position of the connecting arm from moving in the front and rear directions, and the third positioning component fixes the connecting arm.

[0014] In the above technical solution, the large circle templates and the small circle templates are arranged in layers, and the large circle templates and the small circle templates of each layer are driven by corresponding hydraulic cylinders.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The pre-hole template of the present invention adopts a well-shaped bracket as a support, and the large circle template and the small circle template are driven by hydraulic cylinders respectively, realizing the automatic opening and closing of the large circle template and the small circle template, which saves labor and improves efficiency; 2. The small circular template of the present invention is supported by a length-adjustable support rod, which can effectively prevent the plate surface of the small circular template from being deformed, improve the strength, and optimize the processing accuracy of the reserved holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of a prefabricated pier.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 3 yes Figure 2 A partial enlarged view of .

[0019] Figure 4 yes Figure 3 A partial enlarged view of .

[0020] Figure 5 It is a side view of the present invention.

[0021] Figure 6 yes Figure 5 Cross-section of the middle BB surface.

[0022] Figure 7 yes Figure 5 Cross-section view of the middle AA surface.

[0023] Figure 8 This is a schematic diagram of the demoulding state.

[0024] In the figure: a-reserved hole, b-steel pipe composite pile; 1- well-shaped bracket, 2- bottom template, 3- large circle template, 4- small circle template, 5- adjacent inclined surface, 6- steel bar hole, 7- support frame, 8- connecting arm, 8-1- upper connecting arm, 8-2- lower connecting arm, 8-3- oblique connecting arm, 9- slot, 10- support rod, 10-1- internal threaded sleeve, 10-2- threaded rod, 10-3- adjustment hole, 11- connecting ear, 12- positioning block, 13- hydraulic cylinder, 13-1- hydraulic rod, 14- positioning ear, 15- connecting block, 16- support plate, 17- hanging point, 18- fixing plate, 19- fixing bolt, 20- fixing nut, 21- upper positioning inclined surface, 22- lower positioning inclined surface, 23- square socket, 24- wedge-shaped pin, 25- pin hole, 26- positioning cylinder, 27- pin shaft, 28- positioning hole, 29- strip hole, 30- positioning pin shaft. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Example 1 like Figure 2-Figure 8 As shown, a large-volume concrete prefabricated pier reserved hole template device includes a well-shaped bracket 1, a bottom template 2, two large circular templates 3 arranged opposite to each other, and two small circular templates 4 arranged opposite to each other, wherein: like Figure 2 As shown, the plate surfaces of the large circular template 3 and the small circular template 4 are provided with steel bar holes 6 for steel bars to pass through, the adjacent surfaces of the large circular template 3 and the small circular template 4 are adjacent inclined surfaces 5, the large circular template 3 and the small circular template 4 are spaced apart and spliced ​​together by connecting pieces to form a cylindrical template, the well-shaped bracket 1 is located inside the cylindrical template, and the bottom template 2 is detachably fixed coaxially to the bottom of the cylindrical template; The large circular template 3 and the small circular template 4 are respectively slidably connected to the well-shaped bracket 1 through sliding members. The two large circular templates 3 and the two small circular templates 4 are driven by the corresponding hydraulic cylinders 13 to move closer to or away from each other under the guidance of the sliding members. The adjacent inclined surface 5 is parallel to the movement direction of the hydraulic cylinder 13. A support frame 7 is fixed on the inner wall of the large circle template 3 or the small circle template 4. The sliding part includes a connecting arm 8 fixed on the support frame 7 and a slot 9 formed on the criss-cross bracket 1 for the connecting arm 8 to be inserted into. The end of the connecting arm 8 is fixed in the slot 9 by a positioning mechanism.

[0027] The inner wall ends of the small round template 4 are fixed to the well-shaped bracket 1 by at least one detachable support rod 10. The support rod 10 maintains the normal curvature of the small round template 4 and provides corresponding supporting force to prevent the small round template 4 from deforming during the pouring process. Figure 7 As shown, the support rod 10 includes an internally threaded sleeve 10-1 and a threaded rod 10-2 connected to both ends of the internally threaded sleeve 10-1 by threads. The ends of the two threaded rods 10-2 are respectively assembled on the inner wall of the cross-shaped bracket 1 and the corresponding small circular template 4. The internally threaded sleeve 10-1 is provided with an adjustment hole 10-3 for inserting a tool. When the length of the support rod 10 needs to be adjusted, the adjustment rod is inserted into the adjustment hole 10-3 and the internally threaded sleeve 10-1 is rotated. Preferably, a connecting ear 11 is fixed to the inner wall of the small circular template 4 and the cross-shaped bracket 1. A positioning block 12 is rotatably connected to the connecting ear 11, and the ends of the threaded rod 10-2 are fixed to the corresponding positioning block 12.

[0028] As a preference, the hydraulic cylinder 13 is fixed on the well-shaped bracket 1, and the end of the hydraulic rod 13-1 of the hydraulic cylinder 13 is rotatably connected to the support frame 7, or the hydraulic cylinder 13 is fixed on the support frame 7, and the end of the hydraulic rod 13-1 of the hydraulic cylinder 13 is rotatably connected to the well-shaped bracket 1. More preferably, as Figure 4 As shown, a positioning ear 14 is fixed on the support frame 7 or the cross-shaped bracket 1, and a connecting block 15 is rotatably connected to the positioning ear 14. The end of the hydraulic rod 13-1 or the end of the hydraulic cylinder 13 is fixed on the connecting block 15. Furthermore, each small circular template 4 is controlled to open by two hydraulic cylinders 13.

[0029] like Figure 5-Figure 6 As shown, the bottom template 2 is an annular structure, the bottoms of the large circle template 3 and the small circle template 4 are detachably fixed to the top of the bottom template 2, and the bottom template 2 and the support plate 16 are detachably assembled.

[0030] The working method of the large-volume concrete prefabricated pier reserved hole template device comprises the following steps: The steps of supporting the mold body are as follows: first, the large circle template 3 and the small circle template 4 are spliced ​​into a cylindrical template, that is, the reserved hole template device is Figure 8 Adjust the status shown to Figure 7In the state shown, specifically, the hydraulic cylinder 13 that drives and controls the two large circular templates 3 is first started, and the two large circular templates 3 move to opposite positions (the connecting arm 8 slides in the slot 9), and then the hydraulic cylinder 13 that drives the two small circular templates 4 is started, and the two small circular templates 4 move to opposite positions. When the large circular template 3 and the small circular template 4 are spliced ​​into a cylindrical structure, the position of the connecting arm 8 in the slot 9 is first fixed by the positioning mechanism, and then the support rod 10 is assembled. By adjusting the length of the support rod 10, the curvature of the small circular template 4 can be regulated (the support rod 10 can provide sufficient supporting force to the small circular template 4 to avoid deformation during the pouring process), ensuring that the large circular template 3 and the small circular template 4 are in the same circle, the two fixing plates 18 on the adjacent surfaces of the large circular template 3 and the small circular template 4 are fixed together by fixing bolts 19 and fixing nuts 20 to form a cylindrical template, and then the cylindrical template is fixedly connected to the bottom template 2.

[0031] The steps for disassembling the mold body are as follows: first remove the fixation between the cylindrical template and the bottom template 2, then remove the positioning mechanism, release its positioning on the connecting arm 8, remove the fixing bolts 19 and the fixing nuts 20, and then remove the support rods 10 in turn, start the hydraulic cylinder 13 that drives the small circular template 4, drive the two small circular templates 4 to move toward each other, complete the demolding of the small circular template 4, and then start the hydraulic cylinder 13 that drives the large circular template 3 to demold the large circular template 3.

[0032] Example 2 As a preferred Figure 3 As shown, a hanging point 17 is provided on the top of the well-shaped bracket 1. After assembly, the device is lifted through the hanging point 17.

[0033] As a preferred Figure 7 As shown, the connecting part includes a fixing plate 18 fixed to the edges of the large circle template 3 and the small circle template 4, as well as a fixing bolt 19 and a fixing nut 20. The fixing bolt 19 passes through the fixing plate 18 at the edges of the large circle template 3 and the small circle template 4 and cooperates with the fixing nut 20 to fix the large circle template 3 and the small circle template 4 together.

[0034] As a preferred Figure 6 As shown, an upper positioning slope 21 is provided at the top of the bottom template 2, and a lower positioning slope 22 is provided at the bottom of the large circular template 3 and the small circular template 4. Screw holes are evenly distributed on the upper positioning slope 21 and the lower positioning slope 22, and the cylindrical template is fixed to the top of the bottom template 2 by a bolt and nut structure.

[0035] As a preferred Figure 4As shown, the connecting arm 8 includes an upper connecting arm 8-1 and a lower connecting arm 8-2 arranged in parallel, and an oblique connecting arm 8-3 fixed at the ends of the upper connecting arm 8-1 to connect the upper connecting arm 8-1. The length of the lower connecting arm 8-2 is longer than that of the upper connecting arm 8-1.

[0036] As a preferred Figure 4 As shown, the positioning mechanism includes a first positioning component and a second positioning component arranged in front and behind, the first positioning component includes a square socket 23 relatively arranged on two opposite side walls of the slot 9 and a wedge-shaped pin 24 that can be matched and inserted into the square socket 23, the second positioning component includes a pin hole 25 arranged on two opposite side walls of the slot 9, a positioning cylinder 26 located between the side walls of the slot 9, and a pin shaft 27 passing through the pin hole 25 and the positioning cylinder 26, and positioning holes 28 extending radially along the two ends of the pin shaft 27 are provided. The first positioning component is located at the end of the lower connecting arm 8-2, and the second positioning component is located between the lower connecting arm 8-2 and the oblique connecting arm 8-3. The first positioning component and the second positioning component cooperate to fix the position of the connecting arm 8, thereby fixing the large circle template 3 and the small circle template 4 on the criss-cross bracket 1.

[0037] Furthermore, if Figure 4 As shown, the positioning mechanism also includes a third positioning component, which includes a bar hole 29 opened on both sides of the slot 9 and a positioning pin shaft 30 passing through the bar hole 29 and the lower connecting arm 8-2. The first positioning component and the second positioning component prevent the position of the connecting arm 8 from moving in the front and rear directions, and the third positioning component fixes the connecting arm 8.

[0038] Example 3 As a preferred Figure 6 As shown, the large circle template 3 and the small circle template 4 are arranged in layers, and the large circle template 3 and the small circle template 4 of each layer are driven by the corresponding hydraulic cylinder 13.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A large-volume concrete prefabricated pier reserved hole template device, characterized in that: It comprises a well-shaped bracket (1), a bottom template (2), large circle templates (3) arranged opposite to each other in pairs, and small circle templates (4) arranged opposite to each other in pairs, wherein: The large circular template (3) and the small circular template (4) are provided with steel bar holes (6) for steel bars to pass through on their plate surfaces. The adjacent surfaces of the large circular template (3) and the small circular template (4) are adjacent inclined surfaces (5). The large circular template (3) and the small circular template (4) are spaced apart and spliced ​​together through connectors to form a cylindrical template. The well-shaped bracket (1) is located inside the cylindrical template. The bottom template (2) is detachably fixed coaxially to the bottom of the cylindrical template. The large circular template (3) and the small circular template (4) are respectively connected to the well-shaped bracket (1) through sliding members, and the two large circular templates (3) and the two small circular templates (4) are driven by the corresponding hydraulic cylinders (13) to move closer to or farther away from each other under the guidance of the sliding members, and the adjacent inclined surface (5) is parallel to the movement direction of the hydraulic cylinder (13); Both ends of the inner wall of the small circular template (4) are fixed to the well-shaped bracket (1) via at least one detachable support rod (10).

2. The large-volume concrete prefabricated pier reserved hole template device according to claim 1 is characterized in that: A support frame (7) is fixed on the inner wall of the large circular template (3) or the small circular template (4), and the sliding member includes a connecting arm (8) fixed on the support frame (7) and a slot (9) formed on the well-shaped bracket (1) for the connecting arm (8) to be inserted into, and an end of the connecting arm (8) is fixed in the slot (9) by a positioning mechanism.

3. The large-volume concrete prefabricated pier reserved hole template device according to claim 2, characterized in that: The support rod (10) comprises an internally threaded sleeve (10-1) and threaded rods (10-2) connected to both ends of the internally threaded sleeve (10-1) through threads, the ends of the two threaded rods (10-2) are respectively assembled on the inner walls of the well-shaped bracket (1) and the corresponding small circular template (4), and the internally threaded sleeve (10-1) is provided with an adjustment hole (10-3) for inserting a tool; A connecting ear (11) is fixed to the inner wall of the small circular template (4) and the well-shaped bracket (1), a positioning block (12) is rotatably connected to the connecting ear (11), and the end of the threaded rod (10-2) is fixed to the corresponding positioning block (12).

4. The large-volume concrete prefabricated pier reserved hole template device according to claim 2, characterized in that: The hydraulic cylinder (13) is fixed on the well-shaped bracket (1), and the end of the hydraulic rod (13-1) of the hydraulic cylinder (13) is rotatably connected to the support frame (7); Or the hydraulic cylinder (13) is fixed on the support frame (7), and the end of the hydraulic rod (13-1) of the hydraulic cylinder (13) is rotatably connected to the well-shaped bracket (1).

5. The large-volume concrete prefabricated pier reserved hole template device according to claim 1, characterized in that: The connecting member includes a fixing plate (18), a fixing bolt (19), and a fixing nut (20). One fixing plate (18) is fixed on each of two adjacent sides of the large circle template (3) and the small circle template (4). The fixing bolt (19) passes through the fixing plates (18) on the adjacent sides of the large circle template (3) and the small circle template (4) and cooperates with the fixing nut (20) to fix the large circle template (3) and the small circle template (4) together.

6. The large-volume concrete prefabricated pier reserved hole template device according to claim 1, characterized in that: The top of the bottom template (2) is provided with an upper positioning inclined surface (21), and the bottoms of the large circular template (3) and the small circular template (4) are provided with lower positioning inclined surfaces (22). Screw holes are evenly distributed on the upper positioning inclined surface (21) and the lower positioning inclined surface (22). The cylindrical template is fixed to the top of the bottom template (2) by a bolt and nut structure. The bottom of the bottom template (2) is equipped with a support plate (16).

7. The large-volume concrete prefabricated pier reserved hole template device according to claim 2, characterized in that: The connecting arm (8) comprises an upper connecting arm (8-1), a lower connecting arm (8-2) arranged in parallel, and an oblique connecting arm (8-3) fixed at the ends of the upper connecting arm and connecting the upper connecting arm. The length of the lower connecting arm (8-2) is longer than that of the upper connecting arm (8-1).

8. The large-volume concrete prefabricated pier reserved hole template device according to claim 7, characterized in that: The positioning mechanism comprises a first positioning assembly and a second positioning assembly arranged front and back, the first positioning assembly comprising a square socket (23) arranged on two opposite side walls of the slot (9) and a wedge-shaped pin (24) that can be matched and inserted into the square socket (23), the second positioning assembly comprising a pin hole (25) arranged on two opposite side walls of the slot (9), a positioning cylinder (26) located between the side walls of the slot (9), and a pin shaft (27) passing through the pin hole (25) and the positioning cylinder (26), the two ends of the pin shaft (27) being provided with positioning holes (28) extending in the radial direction thereof, the first positioning assembly being located at the end of the lower connecting arm (8-2), and the second positioning assembly being located between the lower connecting arm (8-2) and the oblique connecting arm (8-3).

9. The large-volume concrete prefabricated pier reserved hole template device according to claim 8, characterized in that: The positioning mechanism further includes a third positioning component, which includes strip holes (29) opened on both sides of the slot (9) and a positioning pin shaft (30) passing through the strip holes (29) and the lower connecting arm (8-2). The first positioning component and the second positioning component prevent the position of the connecting arm (8) from moving in the front and rear directions, and the third positioning component fixes the connecting arm (8).

10. The large-volume concrete prefabricated pier reserved hole template device according to claim 1, characterized in that: The large circle template (3) and the small circle template (4) are arranged in layers, and the large circle template (3) and the small circle template (4) of each layer are driven by corresponding hydraulic cylinders (13).

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