Bridge pier supporting and protecting formwork

Abstract

The invention provides a bridge pier supporting formwork, and relates to the technical field of bridge construction, two plate bodies are connected through a connecting part to form a cylindrical structure, the connecting part comprises a plurality of side plates and a plurality of bottom plates, every two adjacent bottom plates and the outwards-protruding side plate between the two bottom plates jointly form a protruding part, and the bottom plates are connected through the connecting part. A concave part is formed by two adjacent bottom plates and the concave side plate between the two bottom plates; openings of the two semi-cylindrical plate bodies are opposite and close to each other, the convex part of one plate body is inserted into the concave part of the other plate body, so that the side plates of the two plate bodies abut against each other correspondingly, the bottom plates of the two plate bodies are connected correspondingly, alignment and splicing of the two plate bodies are completed, then the two plate bodies are fixed through the fasteners, operation is convenient, and the assembly efficiency is improved. The operation efficiency and the positioning precision are improved; the additionally arranged fasteners on the bottom plate can share the stress of the original fasteners on the side plates, so that tiny dislocation of the plate body generated under the influence of cast-in-place concrete side pressure and vibration is reduced, and the risk of slurry leakage or pouring defects is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction, in particular to a bridge pier supporting and shoring formwork. BACKGROUND

[0002] In the field of bridge construction, especially in the cast-in-situ concrete construction process of bridge piers, the formwork system as a key forming and supporting and shoring structure directly affects the precision, quality and construction safety of the bridge pier. In the prior art, steel circular formworks are widely used in the pouring construction of cylindrical or round-end-shaped bridge piers in highway, railway and urban viaduct bridge pier projects due to their high strength, large rigidity and difficulty in deformation. Such formworks are usually formed by bending steel plates into main structures, and multiple arc-shaped formworks are combined and installed on site through splicing structures to form a cylindrical inner cavity meeting the design requirements inside the formwork. The adjacent formworks in a single layer and the formworks in adjacent layers are fastened and connected by bolts.

[0003] The existing steel circular formworks are inconvenient to align and splice the arc-shaped steel plates when in use, and the operation efficiency and positioning accuracy are difficult to guarantee, and the formworks are prone to slight misalignment under the influence of the lateral pressure and vibration of the cast-in-situ concrete, which may cause the risk of missing pouring or pouring defects.

[0004] The information disclosed in the background section of this application is only intended to deepen the understanding of the general background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0005] Therefore, it is necessary to provide a bridge pier supporting and shoring formwork in view of the problems existing in the current steel circular formworks.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] 18. The foldable structure of claim 17, wherein the two side panels are symmetrically provided with connecting portions at two ends of the foldable structure, the two side panels being connected by the connecting portion to form a cylindrical structure. The two side panels are symmetrically provided with connecting portions at two ends of the foldable structure, the two side panels being symmetrically provided with connecting portions at two ends of the foldable structure.

[0008] Optionally, the plane where the side panels are located deviates from the axis of the plate body, and the two adjacent side panels of the connecting portion are symmetrically arranged about a first plane, the first plane passes through the axis and diameter of the plate body, and the first plane passes through the center of the bottom plate.

[0009] Optionally, a first angle is formed between the plane where the bottom plate is located and the plane where the adjacent side plate is located, and the two adjacent bottom plates of the connecting portion are symmetrically arranged about a second plane, and the second plane is perpendicular to the axis of the plate body and passes through the center of the side plate; in the axial direction of the plate body, the size of the side plate constituting the recess and the opening size of the recess are both larger than the size of the side plate constituting the convex portion.

[0010] Optionally, the first angle is equal to 90°, and in the axial direction of the plate body, the size of the side plate constituting the recess is larger than the opening size of the recess; when the convex portion and the concave portion of the two plate bodies are fitted and plugged in, the bottom plates of the two plate bodies are in corresponding abutment.

[0011] Optionally, the first angle is greater than 90°, and in the axial direction of the plate body, the opening size of the recess is greater than the size of the side plate constituting the recess; when the convex portion and the concave portion of the two plate bodies are fitted and plugged in, the bottom plates of the two plate bodies are in corresponding abutment.

[0012] Optionally, the first angle is less than 90°, and in the axial direction of the plate body, the size of the side plate constituting the recess is larger than the opening size of the recess; when the convex portion and the concave portion of the two plate bodies are fitted and plugged in, a gap is formed between the bottom plates of the two plate bodies, and a wedge block can be inserted in the gap, and a through hole for inserting a fastener is provided on the wedge block.

[0013] Optionally, the two ends of the plate body in the axial direction are respectively a first end and a second end, the first end is provided with a semi-ring protrusion along the axial direction of the plate body, and the second end is provided with a semi-ring groove along the axial direction of the plate body, the outer diameter of the semi-ring protrusion is less than or equal to the inner diameter of the semi-ring groove, and the size of the semi-ring protrusion in the axial direction of the plate body is less than or equal to the size of the semi-ring groove in the axial direction of the plate body.

[0014] Optionally, ribs are provided between the side panels and the plate body.

[0015] Optionally, the plate body is provided with semi-ring support plates at both ends of the plate body in the axial direction, and the outer surface of the plate body is provided with support channel steel.

[0016] Optionally, the side panels and the bottom panel have the same thickness.

[0017] The present invention has at least the following beneficial effects:

[0018] (1) The openings of two semi-cylindrical plates are placed opposite and close to each other, and the convex part of one plate is inserted into the concave part of the other plate, so that the side plates of the two plates are correspondingly abutted and the bottom plates of the two plates are correspondingly connected, so as to complete the alignment and splicing of the two plates, and then fix them with fasteners, which is convenient to operate and improves the operating efficiency and positioning accuracy; at the same time, the additional fasteners on the bottom plate can share the stress of the original fasteners on the side plate, and to a certain extent reduce the slight misalignment of the plate under the influence of the side pressure and vibration of the cast-in-place concrete, thereby reducing the risk of leakage or casting defects.

[0019] (2) By setting side panels that deviate from the axis of the plate body, and the side panels at both ends of the plate body are symmetrically set to automatically align the two plates in their radial directions, that is, automatically radially positioning the two plates without the need for additional manual operation, the operation is more convenient, and the operating efficiency and positioning accuracy are further improved; at the same time, the two plates are prevented from being staggered along the joint surface of the side panels.

[0020] (3) When the first angle is greater than 90°, the bottom plate and the second plane are set at an angle, so that the size of the concave portion gradually decreases from its end to the bottom, and the size of the convex portion gradually increases from its end to the bottom. When the convex portion and the concave portion of the two plate bodies are plugged in, the two plate bodies can be automatically aligned in their axial direction, that is, the two plate bodies are automatically positioned axially without the need for additional manual operation, which makes the operation more convenient and further improves the operating efficiency and positioning accuracy.

[0021] (4) When the first angle is less than 90°, the bottom plate and the second plane are set at an angle so that the size of the concave portion gradually increases from the end to the bottom, and the size of the convex portion gradually decreases from the end to the bottom. When the convex portion and the concave portion of the two plates are matched and plugged together, and the wedge is inserted into the gap, the two plates can be automatically aligned in their axial direction, that is, the two plates are automatically positioned axially without additional manual operation, which is more convenient to operate, further improving the operating efficiency and positioning accuracy, and then fixed by fasteners. At the same time, the wedge is in contact with the bottom plates on both sides through the inclined surface, which has a further radial fixing effect on the two plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a pier support template provided in the first embodiment of the present invention;

[0023] Figure 2 for Figure 1 Exploded view of parts;

[0024] Figure 3 for Figure 1 Front view of

[0025] Figure 4 for Figure 3 AA-direction cross-sectional view;

[0026] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0027] Figure 6 for Figure 1 A top view of

[0028] Figure 7 for Figure 6 The cross-sectional view along CC direction;

[0029] Figure 8 for Figure 7 A partial enlarged view of point D in the middle;

[0030] Figure 9 for Figure 7 A partial enlarged view of point E in the middle;

[0031] Figure 10 A schematic structural diagram of a pier support template provided in the second embodiment of the present invention;

[0032] Figure 11 for Figure 10 Front view of

[0033] Figure 12 A schematic structural diagram of a pier support template provided in the third embodiment of the present invention;

[0034] Figure 13 for Figure 12 Front view of

[0035] Figure 14 for Figure 12 Exploded view of parts.

[0036] in:

[0037] 101. Plate body; 102. Fasteners; 103. Ribs; 104. Semi-ring support plates; 105. Support channel steel;

[0038] 201. Side plate; 202. Bottom plate; 203. Protrusion; 204. Concave portion; 205. Wedge; 206. Semi-ring protrusion; 207. Semi-ring groove. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. 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.

[0040] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention include direct and indirect connections (couplings) unless otherwise specified. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0041] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] Example 1

[0043] Example 1 provides a pier support template, see Figures 1 to 9, including two semi-cylindrical plates 101, the plates 101 are symmetrically provided with connecting parts at both ends of the circumference thereof, and the two plates 101 are connected by the connecting parts to form a cylindrical structure, the connecting parts including a plurality of side plates 201 and a plurality of bottom plates 202 alternately arranged along the axial direction of the plate 101, the plane where the side plates 201 are located is parallel to the axis of the plate 101, in the circumferential direction of the plate 101, the adjacent two side plates 201 are respectively located at the two ends of the bottom plate 202, and in the axial direction of the plate 101, the adjacent two bottom plates 202 are respectively located at the two ends of the side plate 201 The two adjacent bottom plates 202 and the convex side plate 201 between them together constitute a convex portion 203, and the two adjacent bottom plates 202 and the concave side plate 201 between them together constitute a concave portion 204. The convex portions 203 and the concave portions 204 are alternately arranged along the axial direction of the plate body 101, and through holes for inserting fasteners 102 are provided on the side plates 201 and the bottom plates 202; the convex portions 203 and the concave portions 204 of the two plate bodies 101 can be matched and plugged in, so that the side plates 201 of the two plate bodies 101 are correspondingly abutted, and the bottom plates 202 of the two plate bodies 101 are correspondingly connected.

[0044] The openings of the two semi-cylindrical plates 101 are placed facing each other and close to each other, and the convex portion 203 of one of the plate bodies 101 is inserted into the concave portion 204 of the other plate body 101, so that the side plates 201 of the two plate bodies 101 are correspondingly abutted, and the bottom plates 202 of the two plate bodies 101 are correspondingly connected to complete the alignment and splicing of the two plate bodies 101, and then fixed with fasteners 102, which is convenient to operate and improves operating efficiency and positioning accuracy; at the same time, the additional fasteners 102 on the bottom plate 202 can share the stress of the original fasteners 102 on the side plate 201, and to a certain extent reduce the slight misalignment of the plate body 101 caused by the side pressure and vibration of the cast-in-place concrete, thereby reducing the risk of leakage or casting defects.

[0045] The fasteners 102 are bolts and nuts. When the convex portions 203 and concave portions 204 of the two plates 101 are mated, the through-holes on the corresponding side plates 201 face each other, and the through-holes on the corresponding bottom plates 202 face each other, facilitating insertion of the fasteners 102. Furthermore, all bottom plates 202 are of the same length. When the convex portions 203 and concave portions 204 of the two plates 101 are mated, the corresponding side plates 201 abut against each other, and are then secured by the fasteners 102, enhancing the tightness and stability of the connection between the side plates 201.

[0046] It is worth noting that, see Figure 5 When the two plates 101 are aligned and spliced, a first splicing seam is formed between the two plates 101, and the two corresponding side plates 201 abut against each other to form a second splicing seam. The first splicing seam and the second splicing seam are staggered. In other words, Figure 5The upper end of the first joint is not directly connected to the lower end of the second joint, which facilitates preliminary alignment between the two panels 101 and the two side panels 201, and better prevents concrete from flowing out of the joint when pouring concrete.

[0047] In this embodiment, the plane where the side panels 201 are located deviates from the axis of the plate body 101 , and the two adjacent side panels 201 at the connecting portion are symmetrically arranged about the first plane. The first plane passes through the axis and diameter of the plate body 101 and the center of the bottom plate 202 .

[0048] By setting the side panels 201 deviated from the axis of the plate body 101, and the side panels 201 at both ends of the plate body 101 are symmetrically arranged, the two plate bodies 101 are automatically aligned in their radial directions, that is, the two plate bodies 101 are automatically radially positioned without the need for additional manual operation, which makes the operation more convenient and further improves the operating efficiency and positioning accuracy; at the same time, it prevents the two plate bodies 101 from staggering with each other along the splicing surface of the side panels 201.

[0049] Among them, the bottom plate 202 is fan-shaped, the center of the fan is located at the inner end of the side plate 201, the outer contour of the fan is the outer contour of the plate body 101 at this location, the radius of the fan is equal to the horizontal dimension of the side plate 201, and the first plane passes through the center radius of the fan.

[0050] In this embodiment, a first angle is formed between the plane where the bottom plate 202 is located and the plane where the adjacent side plate 201 is located, and the two adjacent bottom plates 202 at the connecting portion are symmetrically arranged about a second plane, and the second plane is perpendicular to the axis of the plate body 101 and passes through the center of the side plate 201; in the axial direction of the plate body 101, the size of the side plate 201 constituting the recess 204 and the opening size of the recess 204 are both larger than the size of the side plate 201 constituting the protrusion 203.

[0051] The bottom plate 202 and the side plates 201 form a first angle, and the two are alternately arranged to form a regular S-shaped bending structure. The two adjacent bottom plates 202 are symmetrically arranged to enable the convex portions 203 and concave portions 204 of the two plate bodies 101 to be mated and plugged together. In addition, in the axial direction of the plate body 101, the side plates 201 forming the concave portions 204 are larger than the side plates 201 forming the convex portions 203. In other words, the side plates 201 are arranged in alternating sizes, one large and one small. At the same time, the opening size of the concave portions 204 is larger than the opening size of the side plates 201 forming the convex portions 203, so that the convex portion 203 corresponding to the smaller side plate 201 can be inserted into the concave portion 204 corresponding to the larger side plate 201.

[0052] It is understood that when the plate body 101 is assembled to form a template, the axial direction of the plate body 101 is the vertical direction. The first plane is a vertical plane passing through the center of the bottom plate 202 and passing through the diameter of the plate body 101. The second plane is a horizontal plane passing through the center of the side plate 201.

[0053] In this embodiment, see Figures 1 to 3 , the first angle is equal to 90°, and in the axial direction of the plate body 101, the size of the side plate 201 constituting the recess 204 is larger than the opening size of the recess 204; when the convex portion 203 and the recess 204 of the two plate bodies 101 are fitted and plugged in, the bottom plates 202 of the two plate bodies 101 are correspondingly abutted.

[0054] The first angle is equal to 90°, that is, the bottom plate 202 is parallel to the second plane, so that the size of the recess 204 is consistent from the end to the bottom.

[0055] When in use, the openings of the two semi-cylindrical plate bodies 101 are placed opposite and close to each other, and the convex portion 203 of one plate body 101 is inserted into the concave portion 204 of the other plate body 101. This can automatically perform radial positioning on the two plate bodies 101, so that the side plates 201 of the two plate bodies 101 correspondingly abut against each other, and the bottom plates 202 of the two plate bodies 101 correspondingly abut against each other, so as to complete the alignment and splicing of the two plate bodies 101, and then fix them with fasteners 102 to complete the assembly and fixation of one layer of formwork, after which concrete can be poured into the cavity between the two plate bodies 101.

[0056] In this embodiment, see Figures 7 to 9 The two ends of the plate body 101 in the axial direction are respectively a first end and a second end. The first end is provided with a semi-annular protrusion 206 along the axial direction of the plate body 101, and the second end is provided with a semi-annular groove 207 along the axial direction of the plate body 101. The outer diameter of the semi-annular protrusion 206 is less than or equal to the inner diameter of the semi-annular groove 207, and the size of the semi-annular protrusion 206 in the axial direction of the plate body 101 is less than or equal to the size of the semi-annular groove 207 in the axial direction of the plate body 101.

[0057] When the upper and lower layers of formwork are stacked and joined, the semi-circular protrusion 206 on the upper end of the lower layer engages with the semi-circular groove 207 on the lower end of the upper layer, facilitating positioning of the two layers and maintaining their coaxiality. Simultaneously, a third joint is formed between the lower semi-circular protrusion 206 and the upper semi-circular groove 207, and a fourth joint is formed between the lower semi-circular support plate 104 and the upper semi-circular support plate 104. The third and fourth joints are staggered vertically to prevent concrete from flowing out of these joints during concrete pouring.

[0058] In this embodiment, ribs 103 are provided between the side panels 201 and the plate body 101 . The plane where the ribs 103 are located is perpendicular to the plane where the side panels 201 are located, so as to improve the supporting stability of the side panels 201 .

[0059] In this embodiment, see Figure 1 The plate body 101 is provided with semi-ring support plates 104 at both ends in its axial direction, and a support channel steel 105 is provided on the outer surface of the plate body 101.

[0060] The semi-annular support plate 104 is provided with multiple flange holes at equal intervals along its circumference, facilitating bolt connection between the upper and lower formwork layers. The support channel steel 105 may include an annular member extending along the circumference of the plate 101 and a rod extending along its axial direction, thereby enhancing the supporting strength of the plate 101 in different directions, improving the stability of the overall structure and resisting the lateral pressure of the cast-in-place concrete.

[0061] In this embodiment, the side panels 201 and the bottom panel 202 have the same thickness and can be formed by alternately punching and bending a single plate, thereby facilitating processing.

[0062] Example 2

[0063] Example 2 provides a pier support template, see Figures 10 to 11 The difference from the first embodiment is that: the first angle is greater than 90°, and in the axial direction of the plate body 101, the opening size of the recess 204 is greater than the size of the side plate 201 constituting the recess 204; when the convex portion 203 and the recess 204 of the two plate bodies 101 are mated and plugged in, the bottom plates 202 of the two plate bodies 101 are in corresponding contact.

[0064] The first angle is greater than 90°, that is, the bottom plate 202 is set at an angle to the second plane, so that the size of the recess 204 gradually decreases from its end to the bottom, and the size of the protrusion 203 gradually increases from its end to the bottom. When the protrusion 203 and the recess 204 of the two plate bodies 101 are plugged in, the two plate bodies 101 can be automatically aligned in their axial direction, that is, the two plate bodies 101 are automatically axially positioned without additional manual operation, the operation is more convenient, and the operating efficiency and positioning accuracy are further improved.

[0065] When in use, the openings of the two semi-cylindrical plate bodies 101 are placed opposite and close to each other, and the convex portion 203 of one plate body 101 is inserted into the concave portion 204 of the other plate body 101. This can automatically position the two plate bodies 101 radially and axially, so that the side plates 201 of the two plate bodies 101 are correspondingly abutted, and the bottom plates 202 of the two plate bodies 101 are correspondingly abutted, so as to complete the alignment and splicing of the two plate bodies 101, and then fix them with fasteners 102 to complete the assembly and fixation of one layer of formwork, after which concrete can be poured into the cavity between the two plate bodies 101.

[0066] Example 3

[0067] Example 3 provides a pier support template, see Figures 12 to 14, the difference from the first embodiment is that: the first angle is less than 90°, and in the axial direction of the plate body 101, the size of the side plate 201 constituting the recess 204 is larger than the opening size of the recess 204; when the convex portion 203 and the recess 204 of the two plate bodies 101 are mated and plugged in, a gap is formed between the bottom plates 202 of the two plate bodies 101, and a wedge block 205 can be inserted in the gap, and a through hole is opened on the wedge block 205 for inserting the fastener 102.

[0068] The first angle is less than 90°, that is, the bottom plate 202 is arranged at an angle with the second plane, so that the size of the recess 204 gradually increases from the end to the bottom, and the size of the protrusion 203 gradually decreases from the end to the bottom. When the protrusion 203 and the recess 204 of the two plate bodies 101 are mated and plugged, and the wedge block 205 is inserted into the gap formed between the bottom plates 202 of the two plate bodies 101, the two plate bodies 101 can be automatically aligned in their axial direction, that is, the two plate bodies 101 are automatically axially positioned without additional manual operation, which is more convenient and further improves operational efficiency and positioning accuracy. The two plate bodies 101 are then fixed by the fasteners 102. At the same time, the wedge block 205 and the bottom plates 202 on both sides are in contact with each other through the inclined surface, which further fixes the two plate bodies 101 in the radial direction.

[0069] Among them, when the convex part 203 and the concave part 204 of the two plate bodies 101 are plugged in, the bottom plates 202 of the two plate bodies 101 are parallel to each other and a gap is formed between them. Correspondingly, the inner side thickness of the wedge block 205 is smaller, so that the wedge block 205 can be inserted into the gap formed between the bottom plates 202 of the two plate bodies 101.

[0070] When in use, the openings of the two semi-cylindrical plate bodies 101 are placed opposite and close to each other, and the convex portion 203 of one plate body 101 is inserted into the concave portion 204 of the other plate body 101, which can automatically perform radial positioning of the two plate bodies 101, so that the side plates 201 of the two plate bodies 101 abut against each other, and a gap is formed between the bottom plates 202 of the two plate bodies 101. The wedge block 205 is inserted into the insertion gap, which can automatically perform axial positioning of the two plate bodies 101 to complete the alignment and splicing of the two plate bodies 101, and then fix them with fasteners 102 to complete the assembly and fixation of one layer of formwork, and then concrete can be poured into the cavity between the two plate bodies 101.

[0071] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A pier support formwork, characterized in that:

14. The repairing kit for automotive dents, according to claim 13, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The convex parts and the concave parts of the two plate bodies can be matched and plugged, so that the side plates of the two plate bodies are correspondingly abutted and the bottom plates of the two plate bodies are correspondingly connected.

2. The pier support formwork according to claim 1, characterized in that: The plane where the side plates are located deviates from the axis of the plate body, and the two adjacent side plates of the connecting portion are symmetrically arranged about a first plane. The first plane passes through the axis and diameter of the plate body and the center of the bottom plate.

3. The pier support formwork according to claim 2, characterized in that: A first angle is formed between the plane where the bottom plate is located and the plane where the adjacent side plate is located, and the two adjacent bottom plates of the connecting portion are symmetrically arranged about a second plane, and the second plane is perpendicular to the axis of the plate body and passes through the center of the side plate; in the axial direction of the plate body, the size of the side plate constituting the recess and the opening size of the recess are both larger than the size of the side plate constituting the convex portion.

4. The pier support formwork according to claim 3, characterized in that: The first angle is equal to 90°. In the axial direction of the plate body, the size of the side plate constituting the recess is larger than the opening size of the recess. When the convex portion and the concave portion of the two plate bodies are fitted and plugged in, the bottom plates of the two plate bodies are in corresponding contact.

5. The pier support formwork according to claim 3, characterized in that: The first angle is greater than 90°, and in the axial direction of the plate body, the opening size of the recess is greater than the size of the side plate constituting the recess; when the convex parts and the concave parts of the two plate bodies are fitted and plugged in, the bottom plates of the two plate bodies are in corresponding contact.

6. The pier support formwork according to claim 3, characterized in that: The first angle is less than 90°, and in the axial direction of the plate body, the size of the side plate constituting the recess is larger than the opening size of the recess; when the convex portion and the concave portion of the two plate bodies are fitted and plugged in, a gap is formed between the bottom plates of the two plate bodies, and a wedge block can be inserted in the gap, and a through hole for inserting a fastener is provided on the wedge block.

7. The pier support formwork according to any one of claims 1 to 6, characterized in that: The two ends of the plate body in the axial direction are respectively a first end and a second end, the first end is provided with a semi-ring protrusion along the axial direction of the plate body, and the second end is provided with a semi-ring groove along the axial direction of the plate body, the outer diameter of the semi-ring protrusion is less than or equal to the inner diameter of the semi-ring groove, and the size of the semi-ring protrusion in the axial direction of the plate body is less than or equal to the size of the semi-ring groove in the axial direction of the plate body.

8. The pier support formwork according to claim 1, characterized in that: A rib is provided between the side plate and the plate body.

9. The pier support formwork according to claim 1, characterized in that: The plate body is provided with semi-ring support plates at both ends in the axial direction, and the outer surface of the plate body is provided with support channel steel.

10. The pier support formwork according to claim 1, characterized in that: The side panels and the bottom panel have the same thickness.

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