A large volume concrete prefabricated pier reserved hole template device

Abstract

The application belongs to the technical field of highway bridge construction, and discloses a large-volume concrete prefabricated pier reserved hole formwork device, wherein the board surface of a large circle formwork and a small circle formwork is provided with a steel bar hole for the steel bar to pass through, the adjacent surface of the large circle formwork and the small circle formwork is a butt bevel, the large circle formwork and the small circle formwork are arranged at intervals and are spliced through a connecting piece to form a cylindrical formwork, a cross-shaped support is located inside the cylindrical formwork, and a bottom formwork is detachably fixed to the bottom of the cylindrical formwork in the same axis. The large circle formwork and the small circle formwork are slidably connected with the cross-shaped support through sliding members, two large circle formworks and two small circle formworks are driven by corresponding hydraulic oil cylinders to move close to or away from each other under the guidance of the sliding members, and the inner wall of the small circle formwork is fixed to the cross-shaped support through at least one detachable supporting rod at both ends. The small circle formwork can be opened by the hydraulic oil cylinder, thereby saving time and effort.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of highway bridge construction, in particular to a large-volume concrete prefabricated pier reserved hole formwork device. BACKGROUND

[0002] With the continuous development of infrastructure construction in China, the scale and complexity of highway, bridge and other engineering gradually increase, and large-volume concrete prefabricated components such as super-high pier columns and large-span bridges are emerging. In order to meet the needs of construction quality and progress, prefabricated construction technology has been widely used in infrastructure construction. Prefabricated components need to be hoisted to the site for assembly after being cast in the prefabrication yard. The prefabrication accuracy and construction quality are directly related to the safety and durability of the entire project.

[0003] Large-volume concrete prefabricated piers are an important structural form of highway bridge engineering. The pier is prefabricated in advance at the processing site and then transported to the construction site to shorten the construction period, ensure quality, and reduce wet work on site. Figure 1 As shown in the figure, the split-type 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 with the pier. The reserved hole a needs to be formed with the assistance of a reserved hole formwork. The existing reserved hole formwork is mostly suitable for the formation of small-diameter holes. Directly applying it to large-volume concrete prefabricated piers has the problems of small support strength and difficult demolding. SUMMARY

[0004] The purpose of the present application is to solve the problem of small support strength and difficult demolding of the existing reserved hole formwork. A large-volume concrete prefabricated pier reserved hole formwork device is provided, which can obtain a reserved hole with a diameter of 3-4 meters.

[0005] The technical solution adopted to achieve the purpose of the present application is:

[0006] A large-volume concrete prefabricated pier reserved hole formwork device, comprising a cross-shaped support, a bottom formwork, large circular formworks arranged opposite to each other, and small circular formworks arranged opposite to each other, wherein:

[0007] The plate surface of the large circular formwork and the small circular formwork is provided with a steel bar hole for the steel bar to pass through, the adjacent surfaces of the large circular formwork and the small circular formwork are abutting inclined surfaces, the large circular formwork and the small circular formwork are arranged at intervals and are spliced to form a cylindrical formwork by connecting pieces, the cross-shaped support is located inside the cylindrical formwork, and the bottom formwork is coaxially fixed to the bottom of the cylindrical formwork.

[0008] The big circle template and the small circle template are respectively connected with the cross-shaped support through sliding members, two big circle templates and two small circle templates are driven by corresponding hydraulic cylinders to approach or move away from each other under the guidance of the sliding members, and the abutting inclined surface is parallel to the moving direction of the hydraulic cylinder.

[0009] The inner wall of the small circle template is fixed to the cross-shaped support through at least one detachable supporting rod.

[0010] In the above technical solution, the inner wall of the big circle template or the small circle template is fixed with a support frame, the sliding member comprises a connecting arm fixed on the support frame and a slot formed on the cross-shaped support for inserting the connecting arm, and the end of the connecting arm is fixed in the slot through a positioning mechanism.

[0011] In the above technical solution, the supporting rod comprises an inner threaded sleeve and threaded rods connected to both ends of the inner threaded sleeve through threads, the ends of the two threaded rods are respectively assembled on the inner wall of the corresponding small circle template and the cross-shaped support, and the inner threaded sleeve is provided with an adjusting hole for penetrating a tool;

[0012] The inner wall of the small circle template and the cross-shaped support are fixed with connecting ears, the connecting ears are rotatably connected with positioning blocks, and the ends of the threaded rods are fixed on the corresponding positioning blocks.

[0013] In the above technical solution, the hydraulic cylinder is fixed on the cross-shaped support, and the end of the hydraulic rod of the hydraulic cylinder is rotatably connected on the support frame.

[0014] Or the hydraulic cylinder is fixed on the support frame, and the end of the hydraulic rod of the hydraulic cylinder is rotatably connected on the cross-shaped support.

[0015] In the above technical solution, the connecting member comprises a fixed plate fixed on the edge of the big circle template and the small circle template, a fixed bolt and a fixed nut, the fixed bolt passes through the fixed plate on the edge of the big circle template and the small circle template, and the big circle template and the small circle template are fixed together through the fixed nut.

[0016] In the above technical solution, the top of the bottom template is provided with an upper positioning inclined surface, the bottom of the big circle template and the small circle template is provided with a lower positioning inclined surface, and screw holes are uniformly distributed on the upper positioning inclined surface and the lower positioning inclined surface, the cylindrical template is fixed on the top of the bottom template through a bolt and nut structure, and the bottom of the bottom template is assembled with a support plate.

[0017] In the above technical solution, the connecting arm comprises an upper connecting arm, a lower connecting arm and an inclined connecting arm fixed on the ends of the two to connect the two, and the length of the lower connecting arm is longer than that of the upper connecting arm.

[0018] In the technical scheme, the positioning mechanism comprises a first positioning assembly and a second positioning assembly arranged in front and back, the first positioning assembly comprises a square socket arranged on opposite two side walls of the slot and a wedge-shaped plug matched and inserted into the square socket, the second positioning assembly comprises a pin hole arranged on the opposite two side walls of the slot, a positioning cylinder located between the side walls of the slot and a pin shaft penetrating through the pin hole and the positioning cylinder, the pin shaft is provided with a positioning hole extending in a radial direction of the pin shaft at two ends of the pin shaft, the first positioning assembly is located at the end of the lower connecting arm, and the second positioning assembly is located between the lower connecting arm and the inclined connecting arm.

[0019] In the technical scheme, the positioning mechanism further comprises a third positioning assembly, the third positioning assembly comprises a strip-shaped hole arranged on two sides of the slot and a positioning pin shaft penetrating through the strip-shaped hole and the lower connecting arm, the first positioning assembly and the second positioning assembly prevent the position of the connecting arm from moving from front and back directions, and the third positioning assembly fixes the connecting arm.

[0020] In the technical scheme, the large circle template and the small circle template are arranged in layers, and each layer of the large circle template and the small circle template is driven by a corresponding hydraulic oil cylinder.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. The present application adopts a cross-shaped support as a support, and the large circle template and the small circle template are driven by hydraulic oil cylinders, so that the automatic opening and closing actions of the large circle template and the small circle template are realized, labor is released, and efficiency is improved.

[0023] 2. The small circle template is supported by a length-adjustable supporting rod, which can effectively prevent the deformation of the plate surface of the small circle template, improve the strength, and optimize the machining precision of the reserved hole. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of a prefabricated pier.

[0025] Figure 2 It is a schematic view of the three-dimensional structure of the present application.

[0026] Figure 3 It is a partial enlarged view of Figure 2

[0027] Figure 4 It is a partial enlarged view of Figure 3

[0028] Figure 5 It is a side view of the present application.

[0029] Figure 6 It is a side view of the present application. Figure 5 ​​Cross-sectional view of the middle BB plane.

[0030] Figure 7 yes Figure 5 Cross-sectional view of the AA plane.

[0031] Figure 8 This is a diagram showing the demolding state.

[0032] In the diagram: a - reserved hole, b - steel pipe composite pile;

[0033] 1-Grid-shaped support, 2-Bottom template, 3-Large circular template, 4-Small circular template, 5-Issuing inclined surface, 6-Rebar hole, 7-Support frame, 8-Connecting arm, 8-1-Upper connecting arm, 8-2-Lower connecting arm, 8-3-Angled connecting arm, 9-Slot, 10-Support rod, 10-1-Internal threaded sleeve, 10-2-Threaded rod, 10-3-Adjusting hole, 11-Connecting ear, 12-Positioning block, 13-Hydraulic cylinder, 13-1-Hydraulic rod, 14-Positioning ear, 15-Connecting block, 16-Support plate, 17-Lifting point, 18-Fixing plate, 19-Fixing bolt, 20-Fixing nut, 21-Upper positioning inclined surface, 22-Lower positioning inclined surface, 23-Square insertion hole, 24-Wedge-shaped pin, 25-Pin hole, 26-Positioning cylinder, 27-Pin shaft, 28-Positioning hole, 29-Strip hole, 30-Positioning pin shaft. Detailed Implementation

[0034] 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 merely illustrative of the invention and are not intended to limit the invention.

[0035] Example 1

[0036] like Figures 2-8 As shown, a formwork device for pre-drilled holes in large-volume precast concrete piers includes a grid-shaped support 1, a bottom formwork 2, two large circular formworks 3 arranged opposite each other, and two small circular formworks 4 arranged opposite each other, wherein:

[0037] like Figure 2 As shown, 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 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 by connectors to form a cylindrical template. The grid-shaped support 1 is located inside the cylindrical template. The bottom template 2 is detachably and coaxially fixed to the bottom of the cylindrical template.

[0038] The big circle template 3 and the small circle template 4 are respectively connected with the well-shaped support 1 through sliding members, two big circle templates 3 and two small circle templates 4 are driven by corresponding hydraulic cylinders 13 to approach or move away from each other under the guidance of the sliding members, and the abutting inclined surface 5 is parallel to the moving direction of the hydraulic cylinder 13.

[0039] A support frame 7 is fixed on the inner wall of the big circle template 3 or the small circle template 4, the sliding member includes a connecting arm 8 fixed on the support frame 7 and a slot 9 formed on the well-shaped support 1 for inserting the connecting arm 8, and the end of the connecting arm 8 is fixed in the slot 9 through a positioning mechanism.

[0040] The inner wall of the small circle template 4 is fixed on the well-shaped support 1 through at least one detachable support rod 10, the support rod 10 maintains the normal curvature of the small circle template 4 and provides corresponding support force, so as to prevent the small circle template 4 from deforming during pouring, preferably, as shown in the figure, the support rod 10 includes an inner threaded sleeve 10-1 and threaded rods 10-2 connected to both ends of the inner threaded sleeve 10-1 through threads, the ends of the two threaded rods 10-2 are respectively assembled on the inner wall of the well-shaped support 1 and the corresponding small circle template 4, and an adjusting hole 10-3 for inserting a tool is arranged on the inner threaded sleeve 10-1, when it is necessary to adjust the length of the support rod 10, the inner threaded sleeve 10-1 can be rotated by inserting an adjusting stick into the adjusting hole 10-3. Figure 7

[0041] Preferably, the hydraulic cylinder 13 is fixed on the well-shaped support 1, 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, the end of the hydraulic rod 13-1 of the hydraulic cylinder 13 is rotatably connected to the well-shaped support 1, more preferably, as shown in the figure, a positioning ear 14 is fixed on the support frame 7 or the well-shaped support 1, 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, and further, each small circle template 4 is controlled to open by two hydraulic cylinders 13. Figure 4

[0042] As shown in the figure, the bottom template 2 is in a ring structure, the bottom of the big circle template 3 and the small circle template 4 is detachably fixed on the top of the bottom template 2, and the bottom template 2 is detachably assembled with a support plate 16. Figures 5-6

[0043] ​​​The working method of the large-volume concrete precast pier reserved hole formwork device comprises the following steps:

[0044] The specific steps of the formwork are as follows: first, the large circular formwork 3 and the small circular formwork 4 are spliced into a cylindrical formwork, that is, the reserved hole formwork device is adjusted from the state shown in Figure 8 to the state shown in Figure 7 Specifically, first, the hydraulic oil cylinders 13 driving the two large circular formworks 3 are started, and the two large circular formworks 3 are moved to the positions in opposite directions (the connecting arm 8 slides in the slot 9), then the hydraulic oil cylinders 13 driving the two small circular formworks 4 are started, and the two small circular formworks 4 are moved to the positions in opposite directions, when the large circular formwork 3 and the small circular formwork 4 are spliced into a cylindrical structure, first, the position of the connecting arm 8 in the slot 9 is fixed by the positioning mechanism, then the support rod 10 is assembled, and the length of the support rod 10 is adjusted to control the arc of the small circular formwork 4 (the support rod 10 can provide sufficient support for the small circular formwork 4 to avoid deformation during pouring), the large circular formwork 3 and the small circular formwork 4 are ensured to be concentric, the two fixed plates 18 of the adjacent surfaces of the large circular formwork 3 and the small circular formwork 4 are fixed together by the fixed bolts 19 and the fixed nuts 20 to form a cylindrical formwork, and the cylindrical formwork is fixedly connected with the bottom formwork 2.

[0045] The specific steps of the formwork are as follows: first, the reserved hole formwork device is adjusted from the state shown in to the state shown in

[0046] Specifically, first, the reserved hole formwork device is adjusted from the state shown in to the state shown in

[0047] As preferred, as shown in Figure 3 , the top of the cross-shaped support 1 is provided with a lifting point 17, and the device is lifted by the lifting point 17 after being assembled and formed.

[0048] As preferred, as shown in Figure 7 , the connecting piece comprises the fixed plates 18 fixed on the edges of the large circular formwork 3 and the small circular formwork 4 and the fixed bolts 19 and the fixed nuts 20, the fixed bolts 19 pass through the fixed plates 18 on the edges of the large circular formwork 3 and the small circular formwork 4 and cooperate with the fixed nuts 20 to fix the large circular formwork 3 and the small circular formwork 4 together.

[0049] As preferred, as shown in Figure 6As shown in the figure, the top of the bottom template 2 is provided with an upper positioning slope 21, the bottom of the large circular template 3 and the small circular template 4 is provided with a lower positioning slope 22, the upper positioning slope 21 and the lower positioning slope 22 are uniformly provided with screw holes, and the cylindrical template is fixed on the top of the bottom template 2 through the bolt-nut structure.

[0050] As preferred, as shown in the figure, Figure 4 As shown in the figure, the connecting arm 8 includes the upper connecting arm 8-1 and the lower connecting arm 8-2 which are arranged in parallel, and the inclined connecting arm 8-3 which is fixed at the end of the two connecting arms to connect them, and the length of the lower connecting arm 8-2 is longer than that of the upper connecting arm 8-1.

[0051] As preferred, as shown in the figure, Figure 4 As shown in the figure, the positioning mechanism includes the first positioning assembly and the second positioning assembly which are arranged in front and back, the first positioning assembly includes the square jack 23 which is arranged on the opposite two side walls of the slot 9 and the wedge-shaped plug 24 which can be matched and inserted into the square jack 23, and the second positioning assembly includes the pin hole 25 which is arranged on the opposite two side walls of the slot 9, the positioning cylinder 26 which is located between the side walls of the slot 9, and the pin shaft 27 which passes through the pin hole 25 and the positioning cylinder 26, and the two ends of the pin shaft 27 are provided with the positioning hole 28 which extends along the radial direction of the pin shaft 27, the first positioning assembly is located at the end of the lower connecting arm 8-2, the second positioning assembly is located between the lower connecting arm 8-2 and the inclined connecting arm 8-3, and the first positioning assembly and the second positioning assembly cooperate to fix the position of the connecting arm 8, so as to fix the large circular template 3 and the small circular template 4 on the cross-shaped support 1.

[0052] Further, as shown in the figure, Figure 4 As shown in the figure, the positioning mechanism further includes the third positioning assembly, the third positioning assembly includes the strip-shaped hole 29 which is opened on the two sides of the slot 9 and the positioning pin shaft 30 which passes through the strip-shaped hole 29 and the lower connecting arm 8-2, the first positioning assembly and the second positioning assembly prevent the position of the connecting arm 8 from moving from the front and back directions, and the third positioning assembly fixes the connecting arm 8.

[0053] Embodiment 3

[0054] As preferred, as shown in the figure, Figure 6 As shown in the figure, the large circular template 3 and the small circular template 4 are arranged in layers, and each layer of the large circular template 3 and the small circular template 4 is driven by the corresponding hydraulic oil cylinder 13.

[0055] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A mass concrete precast pier reserved hole formwork device, characterized in that, Including the cross-shaped support (1), the bottom mold plate (2), the two pairs of opposite setting big circle mold plate (3) and the two pairs of opposite setting small circle mold plate (4), wherein: The board surface of the big circle mold plate (3) and the small circle mold plate (4) is provided with the steel bar hole (6) for the steel bar to pass through, the adjacent surface of the big circle mold plate (3) and the small circle mold plate (4) is the abutment inclined plane (5), the big circle mold plate (3) and the small circle mold plate (4) are spaced apart and are connected by the connecting piece to form the cylindrical mold plate, the cross-shaped support (1) is located inside the cylindrical mold plate, and the bottom mold plate (2) is detachably fixed coaxially on the bottom of the cylindrical mold plate; The big circle mold plate (3) and the small circle mold plate (4) are respectively connected with the cross-shaped support (1) by the sliding member, two big circle mold plates (3) and two small circle mold plates (4) are driven by the corresponding hydraulic oil cylinder (13) to approach or move away from each other under the guidance of the sliding member, and the abutment inclined plane (5) is parallel to the action direction of the hydraulic oil cylinder (13). The inner wall of the small circle mold plate (4) is fixed to the cross-shaped support (1) by at least one detachable support rod (10) at both ends; The inner wall of the big circle mold plate (3) and the small circle mold plate (4) is fixed with the support frame (7), the sliding member includes the connecting arm (8) fixed on the support frame (7) and the insertion slot (9) formed on the cross-shaped support (1) for the insertion of the connecting arm (8), and the end of the connecting arm (8) is fixed in the insertion slot (9) by the positioning mechanism. The support rod (10) includes the internal thread sleeve (10-1) and the threaded rod (10-2) connected to both ends of the internal thread 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 support (1) and the corresponding small circle mold plate (4), and the internal thread sleeve (10-1) is provided with the adjusting hole (10-3) for the tool to pass in. The inner wall of the small circle mold plate (4) and the cross-shaped support (1) are fixed with the connecting lug (11), the connecting lug (11) is rotatably connected with the positioning block (12), and the end of the threaded rod (10-2) is fixed on the corresponding positioning block (12). The connecting piece includes the fixed plate (18), the fixed bolt (19) and the fixed nut (20), one of the fixed plates (18) is fixed on the two adjacent edges of the big circle mold plate (3) and the small circle mold plate (4), the fixed bolt (19) passes through the fixed plates (18) on the adjacent edges of the big circle mold plate (3) and the small circle mold plate (4) and is matched with the fixed nut (20) to fix the big circle mold plate (3) and the small circle mold plate (4) together.

2. The formwork assembly for precast mass concrete piers with reserved holes according to claim 1, characterized in that, The hydraulic oil cylinder (13) is fixed on the cross-shaped support (1), and the end of the hydraulic rod (13-1) of the hydraulic oil cylinder (13) is rotatably connected on the support frame (7); Or the hydraulic oil cylinder (13) is fixed on the support frame (7), and the end of the hydraulic rod (13-1) of the hydraulic oil cylinder (13) is rotatably connected on the cross-shaped support (1).

3. The formwork assembly of claim 1, wherein the formwork assembly is configured to be used in a mass concrete precast pier construction. The top of the bottom template (2) is provided with an upper positioning inclined surface (21), the bottom of the large circular template (3) and the small circular template (4) is provided with a lower positioning inclined surface (22), the upper positioning inclined surface (21) and the lower positioning inclined surface (22) are uniformly distributed with screw holes, the cylindrical template is fixed on the top of the bottom template (2) through a bolt-nut structure, and the bottom of the bottom template (2) is provided with a supporting plate (16).

4. The formwork assembly of claim 1, wherein the formwork assembly is configured to be used in a mass concrete precast pier construction project. The connecting arm (8) comprises upper connecting arms (8-1) and lower connecting arms (8-2) arranged in parallel and an inclined connecting arm (8-3) fixed at the ends of the two connecting arms to connect the two connecting arms, and the length of the lower connecting arm (8-2) is longer than that of the upper connecting arm (8-1).

5. The formwork assembly of claim 4, wherein the formwork assembly is configured to be used in a mass concrete precast pier construction project. The positioning mechanism comprises first and second positioning components arranged in front and back, the first positioning component comprises square insertion holes (23) arranged on opposite two side walls of the insertion slot (9) and wedge-shaped insertion pins (24) which can be matched and inserted into the square insertion holes (23), the second positioning component comprises pin holes (25) arranged on the opposite two side walls of the insertion slot (9), a positioning cylinder (26) located between the side walls of the insertion slot (9) and a pin shaft (27) penetrating through the pin holes (25) and the positioning cylinder (26), the pin shaft (27) is provided with positioning holes (28) extending along the radial direction of the pin shaft (27) at both ends of the pin shaft (27), 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 inclined connecting arm (8-3).

6. The formwork assembly of claim 5, wherein the formwork assembly is configured to be used in a mass concrete precast pier construction. The positioning mechanism further comprises a third positioning component, the third positioning component comprises strip-shaped holes (29) opened on both sides of the insertion slot (9) and a positioning pin shaft (30) penetrating through the strip-shaped holes (29) and the lower connecting arm (8-2), the first and second positioning components prevent the position of the connecting arm (8) from moving from front to back, and the third positioning component fixes the connecting arm (8).

7. The formwork assembly of claim 1, wherein the formwork assembly is configured to be used in a mass concrete precast pier construction project. The large circular template (3) and the small circular template (4) are arranged in layers, and each layer of the large circular template (3) and the small circular template (4) is driven by a corresponding hydraulic oil cylinder (13).

Images