A type of formwork for casting bridge piers

Abstract

This application discloses a bridge pier casting formwork, relating to the field of bridge construction technology. The bridge pier casting formwork includes an outer formwork, an insulation layer, and an inner formwork arranged sequentially from the outside in; a vacuum cavity is provided inside the outer formwork and / or the inner formwork; multiple support columns are arranged between the outer formwork and the inner formwork; one end of each support column is connected to the inner wall of the outer formwork, and the other end is connected to the outer wall of the inner formwork; the insulation layer has an economical thickness of 100mm-200mm; the opening directions of the two halves of the formwork in the same layer are the same; the heat transfer path of the formwork is tortuous. This application can meet the curing requirements of the poured concrete and effectively isolate the heat exchange between the inner bridge pier and the outside. It not only eliminates the need for subsequent covering of the bridge pier with an insulation curing device, simplifying the subsequent insulation curing process, but also allows for repeated use, avoiding resource waste or pollution.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, specifically a formwork for pouring concrete for bridge piers. Background Technology

[0002] In the construction of bridge structures, in seasons or regions where the ambient temperature is below 5℃, effective thermal insulation and curing are necessary immediately after concrete pouring to ensure that the free water in the concrete does not freeze during the setting process, allowing the water to react chemically with the cement in a timely manner and solidify into concrete blocks of a certain strength. For concrete thermal insulation and curing in open-air environments, the following methods are currently used: covering with cotton cloth for thermal insulation curing, setting up a shed for steam curing, setting up a tarpaulin and using an electric furnace for heating and insulation, and spraying polyurethane foam insulation onto the formwork. The advantages and disadvantages of each method are quite obvious. Covering with cotton cloth for thermal insulation curing is simple and easy to implement, but the insulation effect of cotton cloth is generally poor, and it is not suitable for extremely low ambient temperatures. Poor installation can expose the structure, leading to cold bridges, and the exposed parts will not provide the necessary insulation. In addition, cotton cloth is easily damaged and torn, has a limited number of reuses, and is discarded after use, resulting in resource waste. While steam curing in greenhouses is beneficial for early concrete strength development, rapid early hydration leads to larger pores within the concrete, negatively impacting durability. Furthermore, since most cement hydrates early, it hinders sustained strength growth in the later stages of hydration. The insulation process for steam curing in greenhouses is complex and inconvenient. Using electric furnaces to heat the tarpaulin has similar effects to steam curing, but the rapid heating and cooling of electric furnaces makes temperature control difficult, resulting in inconsistent internal and external temperature differences and frequent sudden temperature increases that can cause surface cracking. Tarpaulin installation is also inconvenient. Spraying polyurethane foam onto the formwork to form an insulation layer provides good insulation, but the layer has low rigidity and is easily damaged during demolding and reinstallation. This is a one-time insulation measure and currently generates new white pollution. Utility Model Content

[0003] The purpose of this application is to provide a formwork for pouring concrete for bridge piers, so as to solve the technical problems of existing concrete insulation and curing devices for bridge construction being complex, difficult to operate, or prone to resource waste or pollution.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A formwork for casting bridge piers includes an outer formwork, an insulation layer, and an inner formwork arranged sequentially from the outside to the inside; a vacuum cavity is provided inside the outer formwork and / or the inner formwork; a plurality of support columns are provided between the outer formwork and the inner formwork; one end of each support column is connected to the inner wall of the outer formwork, and the other end is connected to the outer wall of the inner formwork.

[0006] As a specific solution in this application, the outer wall of the outer template is provided with multiple circumferential reinforcing ribs and / or multiple axial reinforcing ribs; each circumferential reinforcing rib is uniformly arranged along the axial direction of the outer template; each axial reinforcing rib is uniformly arranged around the circumference of the outer template.

[0007] As a specific solution in this application, both the outer template and the inner template are steel plates; the insulation layer includes insulation cotton or polystyrene board.

[0008] As a specific embodiment of the technical solution in this application, the support column is cylindrical; or the support column is a figure-eight shaped column, with each support column alternating around the end connected to the outer template in the circumference of the outer template.

[0009] As a specific solution in this application, the casting template is provided with a first locking interface and a second locking interface; the first locking interface of the casting template is used to lock with the second locking interface of another casting template; the second locking interface of the casting template is used to lock with the first locking interface of another casting template; after the casting template locks with another casting template, a casting cavity is formed between the two casting templates.

[0010] As a specific solution in this application, the opening directions of the first card interface and the second card interface are the same.

[0011] As a specific solution in this application, the first card interface is stepped; the outer template covers the outer wall of the insulation layer along the circumference of the insulation layer; the inner template covers the inner wall of the insulation layer along the circumference of the insulation layer.

[0012] As a specific solution in this application, the thickness of the insulation layer is greater than or equal to 100mm and less than or equal to 200mm.

[0013] As a specific solution in this application, the top of the outer template is provided with a first snap-fit ​​groove and the bottom is provided with a second snap-fit ​​groove; in use, the outer template can be snapped into the second snap-fit ​​groove of another outer template through the first snap-fit ​​groove.

[0014] As a specific solution in this application, the top of the inner template is provided with a third snap-fit ​​groove and the bottom is provided with a fourth snap-fit ​​groove; in use, the inner template can be snapped into the fourth snap-fit ​​groove of another inner template through the third snap-fit ​​groove.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The bridge pier casting formwork proposed in this application has a thermal insulation function, which can meet the curing requirements of the poured concrete and effectively isolate the internal bridge pier from the external heat exchange. It not only eliminates the need for subsequent covering of the bridge pier with thermal insulation curing devices, simplifying the subsequent thermal insulation curing process, but also allows for repeated use, avoiding resource waste or pollution. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a building formwork used to splice together a casting cavity, as proposed in an embodiment of this application.

[0018] Figure 2 This is a top view schematic diagram of another type of building formwork used in the embodiments of this application to splice together a casting cavity;

[0019] Figure 3 This is a three-dimensional schematic diagram of a building template proposed in an embodiment of this application;

[0020] Figure 4 for Figure 3 A top view of the formwork for construction.

[0021] Figure 5 for Figure 4 Sectional view of the formwork in the building according to line AA;

[0022] Figure 6 for Figure 3 Front view diagram of building formwork;

[0023] Figure 7 Another type of building formwork proposed in the embodiments of this application is based on Figure 6 Schematic diagram of the cross section of the middle BB line;

[0024] Figure 8 Another building template proposed in this application embodiment is based on Figure 6 Schematic diagram of the cross section of the middle BB line;

[0025] Figure 9 This is a schematic diagram illustrating heat loss inside the casting template in an embodiment of this application;

[0026] Figure 10 This is a top view of the splicing of a building template proposed in an embodiment of this application;

[0027] Figure 11 This is a top view of another type of building template assembly proposed in the embodiments of this application;

[0028] Figure 12 The graph shows the change of the center temperature of the pier column over time under different insulation layer thicknesses (using C30 concrete, the experimental environment temperature was 20±2℃).

[0029] Figure 13 The graph shows the change of the center temperature of the pier column over time under different insulation layer thicknesses (using C50 concrete, the experimental environment temperature was 20±2℃).

[0030] Figure 14 The maximum increase in center temperature of the pier column under different insulation layer thicknesses was determined (using C30 concrete, with an experimental ambient temperature of 20±2℃).

[0031] Figure 15 The maximum increase in center temperature of the pier column under different insulation layer thicknesses was determined (using C50 concrete, with an experimental ambient temperature of 20±2℃).

[0032] Figure 16 Another type of building formwork proposed in the embodiments of this application. Figure 6 Schematic diagram of the cross section of the middle BB line;

[0033] Figure 17 The embodiments proposed in this application Figure 16 An enlarged view of part E in the image;

[0034] Figure 18 The embodiments proposed in this application Figure 16 Enlarged view of section F in the middle;

[0035] Figure 19 The embodiments proposed in this application Figure 16 An enlarged view of another type of part E in the diagram;

[0036] Figure 20 The embodiments proposed in this application Figure 16 Another enlarged view of part E in the image;

[0037] Figure 21 The embodiments proposed in this application Figure 16 An enlarged view of another part E in the diagram.

[0038] In the diagram: 1. Casting formwork; 11. Outer formwork; 111. Circumferential reinforcing rib; 112. Axial reinforcing rib; 113. First clamping groove; 114. Second clamping groove; 115. First step plane; 116. Second step plane; 117. Fifth step plane; 118. Sixth step plane; 12. Insulation layer; 121. Outer wall surface; 122. Inner wall surface; 123. First end plane; 124. Second end plane; 13. Inner formwork; 131. Third clamping groove; 132. Fourth clamping groove; 133. Third step plane; 134. Fourth step plane; 135. Seventh step plane; 136. Eighth step plane; 14. First clamping interface; 15. Second clamping interface; 16. Vacuum cavity; 17. Support column; 18. Connecting edge; 2. Casting cavity; 3. Female formwork; 4. Male formwork. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0043] To provide a more convenient, efficient, waste-free, pollution-free, and recyclable self-insulating device, this application proposes an embodiment of a bridge pier casting template. Specifically, the bridge pier casting template includes, from the outside in (i.e., as shown in the image), a formwork for casting bridge piers. Figure 4The outer template 11, insulation layer 12, and inner template 13 are arranged sequentially in direction C. A vacuum cavity 16 is provided inside either the outer template 11 or the inner template 13. Multiple support columns 17 are provided between the outer template 11 and the inner template 13. One end of each support column 17 is connected to the inner wall of the outer template 11, and the other end of each support column 17 is connected to the outer wall of the inner template 13.

[0044] It should be clear that the bridge pier casting template proposed in the above embodiments has a thermal insulation function, which not only eliminates the need for subsequent thermal insulation and curing devices to be covered on the bridge piers, thus simplifying the subsequent thermal insulation and curing process, but also allows for repeated use, thus avoiding resource waste or pollution.

[0045] It is important to understand that in classical physics, a vacuum is considered a barrier to heat conduction because heat transfer requires a medium, which is lacking in a vacuum. In other words, in classical physics, a vacuum is the ultimate barrier to heat conduction. To enhance the thermal insulation effect of the bridge pier casting formwork proposed in this application, in some embodiments of this application, such as... Figure 5 , Figure 7 and Figure 8 As shown, both the outer template 11 and the inner template 13 are provided with a vacuum cavity 16.

[0046] It needs to be clear that, such as Figure 1 As shown, in the embodiment of this application, the casting template 1 is used by splicing at least two casting templates 1 to form a casting cavity 2, and then concrete is poured into the casting cavity 2 to form a bridge pier. To maintain the shape of the casting cavity 2, in this embodiment, the casting template 1 can be supported. To facilitate the support of the casting template 1, in this embodiment, the outer wall of the outer template 11 can be provided with multiple circumferential reinforcing ribs 111 and / or multiple axial reinforcing ribs 112. The circumferential reinforcing ribs 111 are evenly arranged along the axial direction of the outer template 11, and the axial reinforcing ribs 112 are evenly arranged around the circumference of the outer template 11. Figure 1 As shown, since the circumferential reinforcing ribs 111 and the axial reinforcing ribs 112 interweave to form multiple squares, it is convenient for the operator to use support devices (e.g., support rods) to support the casting formwork 1. Furthermore, the arrangement of the circumferential reinforcing ribs 111 and the axial reinforcing ribs 112 can improve the strength of the outer formwork 11 to a certain extent.

[0047] In the embodiments of this application, no restrictions are placed on the materials of the outer formwork 11, the insulation layer 12, and the inner formwork 13. That is, users can choose appropriate materials to manufacture the outer formwork 11, the insulation layer 12, and the inner formwork 13 according to the actual application scenario. For example, if casting the piers of a small bridge, the outer formwork 11 and the inner formwork 13 can be engineering plastic sheets; if casting the piers of a medium to large bridge, the outer formwork 11 and the inner formwork 13 can be steel plates. The insulation layer 12 can be insulation cotton, sponge, or polystyrene board, etc.

[0048] In the embodiments of this application, no limitation is placed on the thickness of the insulation layer 12. In practical applications, to save costs, the inventors designed the insulation layer 12 to be relatively thin. Subsequently, it was found that the overall formwork did not provide ideal insulation for certain types of concrete (e.g., C50 concrete). To improve the insulation effect on these concrete types, the inventors designed the insulation layer 12 to be thicker, but this significantly increased the cost. To make the formwork suitable for most types of concrete insulation while maintaining relatively low manufacturing costs, the inventors, after extensive testing and verification, found that when the thickness of the insulation layer 12 is greater than or equal to 100mm and less than or equal to 200mm, the formwork can meet the insulation requirements of most concrete types while also maintaining low manufacturing costs.

[0049] Specifically, Figure 12 The graph shows the change of the center temperature of the pier column over time under different insulation layer thicknesses (using C30 concrete, the experimental environment temperature was 20±2℃). Figure 13 This graph shows the temperature change over time at the center of the pier column with different insulation layer thicknesses (using C50 concrete, experimental environment temperature 20±2℃). Figure 12 and Figure 13 It is evident that the center temperature of the pier with insulation is significantly higher than that of the pier without insulation (i.e., without the building formwork proposed in this application embodiment). Generally, the temperature of concrete after generating heat of hydration reaches its peak between 24 and 48 hours after pouring. The peak temperature increases with the increase in the thickness of the protective layer, indicating that increasing the thickness of the insulation layer helps the concrete retain more heat of hydration during the heat generation process, thus enabling self-insulating curing using the heat of hydration. Figure 14 The maximum increase in center temperature of the pier column under different insulation layer thicknesses was determined (using C30 concrete, with an experimental ambient temperature of 20±2℃). Figure 15 The maximum increase in center temperature of the pier column under different insulation layer thicknesses was determined (using C50 concrete, experimental ambient temperature 20±2℃). Figure 14 and Figure 15It is evident that, compared to standard-cured piers, when the insulation peak reaches its maximum, although the insulation layer thickness increases from 100mm to 1000mm, the corresponding peak center temperature does not increase proportionally. For C30 concrete, the peak center temperature of the pier only increases from 1.69 times to 2.11 times; for C50 concrete, it only increases from 1.98 times to 2.59 times. Extensive test data shows that an insulation layer with a thickness greater than or equal to 100mm and less than or equal to 200mm can already improve the thermal insulation performance of concrete by 1.70 to 2.00 times. Increasing the insulation layer thickness from 200mm to 1000mm only increases the peak temperature by 0.30 to 0.45 times, which is clearly uneconomical. Therefore, in the embodiments of this application, the thickness of the insulation layer 12 can be greater than or equal to 100mm and less than or equal to 200mm. In a specific embodiment of this application, the thickness of the insulation layer 12 can be any one of 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm and 200mm, or any thickness between two adjacent thicknesses mentioned above.

[0050] In the embodiments of this application, the purpose of providing support columns 17 is to prevent the outer formwork 11 and the inner formwork 13 from contacting and forming cold bridges, thereby affecting the thermal insulation performance of the casting formwork 1; and to prevent changes in the relative positions between the outer formwork 11 and the inner formwork 13, thereby damaging the insulation layer 12 and affecting the thermal insulation performance of the casting formwork 1. Specifically, Figure 9 This is a schematic diagram illustrating heat loss inside the casting template in an embodiment of this application. Figure 9 As shown, the path of heat loss inside the casting formwork is as follows: Figure 9 As shown in path E, the heat is first conducted from the inner sidewall of the inner template 13 to the outer sidewall of the inner template 13, then from the outer sidewall of the inner template 13 along the support column 17 to the inner sidewall of the outer template 11, and finally from the inner sidewall of the outer template 11 to the outer sidewall of the outer template 11. In other words, the cold bridge path formed by the casting template in this embodiment is relatively long, which effectively avoids heat loss inside the casting template.

[0051] In the embodiments of this application, no limitations are placed on the shape and structure of the support column 17. That is, the support column 17 can be of any shape and structure capable of supporting and maintaining the distance between the outer template 11 and the inner template 13. For example, in one embodiment of this application, such as Figure 7 As shown, the support column 17 can be cylindrical. In another embodiment of this application, as... Figure 8As shown, the support columns 17 can be in a figure-eight shape, with each support column 17 alternating between its ends connected to the outer template 11 around its circumference. It is important to understand that each support column 17 has two ends, one of which is designated as the first end, and the other as the second end. The alternating connection of each support column 17 to the outer template 11 around its circumference means that if the first end of a support column 17 is connected to the outer template 11, then the adjacent support column 17 must also have its second end connected to the outer template 11.

[0052] It is important to understand that support columns in an "8" shape provide more stable support for both the outer and inner formwork compared to cylindrical support columns. For example... Figure 8 As shown, by alternating the connection between the various "eight"-shaped support columns around the circumference of the outer template and the end connected to the outer template, the stability of the outer and inner template supports can be further improved.

[0053] It should be clear that, in the embodiments of this application, the two casting molds 1 can be joined together in any way to form the casting cavity 2. For example, in one embodiment of this application, such as Figure 2 As shown, the casting template 1 may be provided with connecting edges 18. In use, two casting templates 1 are threaded together via the connecting edges 18 to form a casting cavity 2. In another embodiment of this application, as... Figure 1 As shown, the two casting templates 1 can be joined together to form a casting cavity 2.

[0054] In the embodiments of this application, no restrictions are placed on the style of the card interface formed by the casting template 1. For example, the card interface formed by the casting template can be as follows: Figure 9 As shown. Figure 9 The card interface shown indicates that the two mating casting templates are not identical (i.e., female template 3 and male template 4). In other words, in this embodiment, only female template 3 and male template 4 can fit together to form the casting cavity 2; two female templates 3 or two male templates 4 cannot fit together to form the casting cavity 2. In other words, during use, if many female templates 3 are damaged, the corresponding number of male templates 4 will also be unusable; conversely, if many male templates 4 are damaged, the corresponding number of female templates 3 will also be unusable.

[0055] To improve the versatility and utilization rate of the casting template 1, in one embodiment of this application, the casting template 1 is provided with a first locking interface 14 and a second locking interface 15. The first locking interface 14 of the casting template 1 is used to engage with the second locking interface 15 of another casting template 1. The second locking interface 15 of the casting template 1 is used to engage with the first locking interface 14 of another casting template 1. After the casting template 1 engages with another casting template 1, a casting cavity 2 is formed between the two casting templates 1. It is easy to understand that, as Figure 7 and Figure 8 As shown, the first locking interface 14 on each casting template 1 can engage with the second locking interface 15 of another casting template 1, and the second locking interface 15 on each casting template 1 can engage with the first locking interface 14 of another casting template 1. This means that any two casting templates 1 can be interlocked to form a casting cavity 2. In other words, the arrangement of the first locking interface 14 and the second locking interface 15 allows any two casting templates 1 to be used together, thus improving the versatility and utilization rate of the casting templates 1.

[0056] It needs to be clear that, such as Figure 9 After the concrete pouring is completed, the internal stress between the two formwork panels (i.e., the female formwork 3 and the male formwork 4) is relatively large, making it difficult to remove them. Forcibly separating the two formwork panels using mechanical removal equipment can easily damage them, resulting in loss of insulation and rendering them unusable. To facilitate the removal of the formwork panels, in one embodiment of this application, such as... Figure 4 As shown, the opening directions of the first card interface 14 and the second card interface 15 are the same, that is, the opening directions of the first card interface 14 and the second card interface 15 are both facing as shown. Figure 4 The direction D is shown. It is easy to understand that because the opening directions of the first clamping interface 14 and the second clamping interface 15 are the same, the poured concrete cannot create significant internal stress between the two casting formwork 1s. For example... Figure 11 As shown, during the disassembly process, only a pulling force opposite to direction D needs to be applied to the casting template 1 to separate the two casting templates 1. Since there is no large internal stress between the two casting templates 1, the pulling force when disassembling the casting template 1 is also small, and it is not easy to damage the casting template 1.

[0057] In the embodiments of this application, the insulation layer 12 plays a crucial role in the insulation process during the manufacturing of the bridge pier. That is, if the insulation layer 12 is damaged, it will severely affect the insulation performance of the casting formwork 1. As mentioned above, the insulation layer 12 is made of polystyrene board or insulation cotton, meaning it is easily damaged by external forces. To prevent the insulation layer 12 from being damaged by external forces during use, and thus to avoid affecting the insulation performance of subsequent insulation layers 12, such as... Figure 4 , Figure 7 and Figure 8As shown, the first locking interface 14 is stepped. The outer template 11 covers the outer wall of the insulation layer 12 along its circumference. The inner template 13 covers the inner wall of the insulation layer 12 along its circumference. In other words, the outer wall of the insulation layer 12 can be protected by the outer template 11, and the inner wall of the insulation layer 12 can be protected by the inner template 13, making the insulation layer 12 less prone to damage during use. Furthermore, the locking surface formed by the insulation layers 12 on the two casting templates 1 is planar, and the planar locking surface of the insulation layer 12 also makes it less prone to damage during the locking process. Therefore, the first locking interface 14 and the second locking interface 15 of this embodiment can improve the service life of the insulation layer 12, thus ensuring that the casting template 1 maintains good insulation performance for a long time.

[0058] In the embodiments of this application, the form of the stepped first card interface 14 and the second card interface 15 is not limited. For example, the first card interface 14 can be... Figures 19 to 21 Any one of them. It should be clear that if the first card interface 14 is... Figures 19 to 21 If any one of the following is true, then a portion of the outer wall surface 121 or the inner wall surface 122 of the insulation layer 12 will always be present (i.e., Figures 19 to 21 The gray line portion cannot be covered by either the outer template 11 or the inner template 13. During long-term use, the exposed portion of the insulation layer 12 is easily damaged. To further enhance the protection of the insulation layer 12, in one embodiment of this application, such as... Figures 16 to 18 As shown, the end face of the first card interface 14 includes, from the outside in (i.e., as shown in the diagram) Figure 17 The first step plane 115, the second step plane 116, the first end plane 123, the third step plane 133, and the fourth step plane 134 are sequentially arranged in the direction G. The end face of the second card interface 15 includes, from the outside to the inside (i.e., as shown in the image). Figure 18The fifth step plane 117, the sixth step plane 118, the second end plane 124, the seventh step plane 135, and the eighth step plane 136 are sequentially arranged in the direction H of the pouring cavity 2. The first step plane 115, the second step plane 116, the fifth step plane 117, and the sixth step plane 118 are all located on the outer formwork 11. The first end plane 123 and the second end plane 124 are both located on the insulation layer 12. The third step plane 133, the fourth step plane 134, the seventh step plane 135, and the eighth step plane 136 are all located on the inner formwork 13. The second step plane 116, the first end plane 123, the third step plane 133, the sixth step plane 118, the second end plane 124, and the seventh step plane 135 are all flush with each other. The second step plane 116 extends beyond the first step plane 115 along the circumference of the pouring cavity 2. The fourth step plane 134 extends beyond the third step plane 133 along the circumference of the pouring cavity 2. The seventh step plane 135 extends beyond the eighth step plane 136 along the circumference of the pouring cavity 2. The fifth step plane 117 extends beyond the sixth step plane 118 along the circumference of the casting cavity 2.

[0059] In this embodiment, as Figure 17 The first card interface 14 shown and as follows Figure 18 The second card interface 15 shown can completely cover the outer wall surface 121 and inner wall surface 122 of the insulation layer 12, effectively preventing damage to the outer wall surface 121 or inner wall surface 122 of the insulation layer 12 due to impacts during long-term use. Furthermore, as shown... Figure 17 and Figure 18 As shown, the end faces of the insulation layer 12 (i.e., the first end plane 123 and the second end plane 124) are both planes, relative to... Figure 19 The stepped end face and the flat end face are less likely to be damaged during the splicing of the two casting templates 1.

[0060] In the actual operation of bridge pier casting, such as Figure 1 As shown, multiple casting templates 1 ( Figure 1 The previous example only showed that four casting templates 1) stacked layer by layer form the casting cavity 2, which is required to complete the casting model of one bridge pier. In the embodiments of this application, in order to ensure the stability of the stacked casting templates 1, semi-circular flanges (not shown in the figure) can be set at the top and bottom of the casting templates 1. In use, the upper and lower adjacent casting templates 1 are fixed by bolting together through the semi-circular flanges. Of course, in the embodiments of this application, the two stacked casting templates 1 can also be fixed by snap-fitting.

[0061] In a specific embodiment of this application, such as Figure 5As shown, the top of the outer template 11 is provided with a first snap-fit ​​groove 113, and the bottom is provided with a second snap-fit ​​groove 114. In use, the outer template 11 can be snapped into the second snap-fit ​​groove 114 of another outer template 11 through the first snap-fit ​​groove 113. The first snap-fit ​​groove 113 and the second snap-fit ​​groove 114 can enhance the stability of the casting templates 1 after stacking.

[0062] To further improve the stability of the stacked casting formwork 1, in another specific embodiment of this application, such as... Figure 5 As shown, the top of the inner template 13 is provided with a third snap-fit ​​groove 131 and the bottom is provided with a fourth snap-fit ​​groove 132; in use, the inner template 13 can be snapped into the fourth snap-fit ​​groove 132 of another inner template 13 through the third snap-fit ​​groove 131.

[0063] The bridge pier casting template proposed in this application has a thermal insulation function, which not only eliminates the need for subsequent thermal insulation and curing devices to be covered on the bridge piers, thus simplifying the subsequent thermal insulation and curing process, but also allows for repeated use, thus avoiding resource waste or pollution.

[0064] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A formwork for casting bridge piers (1), characterized in that, It includes an outer template (11), an insulation layer (12), and an inner template (13) arranged sequentially from the outside to the inside; a vacuum cavity (16) is provided inside the outer template (11) and / or the inner template (13); a plurality of support columns (17) are provided between the outer template (11) and the inner template (13); one end of each support column (17) is connected to the inner wall of the outer template (11), and the other end is connected to the outer wall of the inner template (13); The casting template (1) is provided with a first locking interface (14) and a second locking interface (15); the first locking interface (14) of the casting template (1) is used to lock with the second locking interface (15) of another casting template (1); the second locking interface (15) of the casting template (1) is used to lock with the first locking interface (14) of another casting template (1); after the casting template (1) locks with another casting template (1), a casting cavity (2) is formed between the two casting templates (1); The opening directions of the first card interface (14) and the second card interface (15) are the same; The first card interface (14) is stepped; the outer template (11) covers the outer wall of the insulation layer (12) along the circumference of the insulation layer (12); the inner template (13) covers the inner wall of the insulation layer (12) along the circumference of the insulation layer (12); The end face of the first card interface (14) includes a first step plane (115), a second step plane (116), a first end plane (123), a third step plane (133), and a fourth step plane (134) arranged sequentially from the outside to the inside; the end face of the second card interface (15) includes a fifth step plane (117), a sixth step plane (118), a second end plane (124), a seventh step plane (135), and an eighth step plane (136) arranged sequentially from the outside to the inside; the first step plane (115), the second step plane (116), the fifth step plane (117), and the sixth step plane (118) are all located on the outer template (11); the first end plane (123) and the second end plane (124) are both located on the insulation layer (12); the third step plane (133), the fourth step plane (134), and the fifth step plane (115) are all located on the outer template (11); the first end plane (123) and the second end plane (124) are both located on the insulation layer (12); the third step plane (133), the fourth step plane (134), the fifth step plane (115), the sixth step plane (116), the fifth step plane (117), and the sixth step plane (118) are all located on the outer template (11); the first end plane (123) and the second end plane (124) are all located on the insulation layer (12); the third step plane (133), the fourth step plane (134), the fifth step plane (115), the sixth step plane (116), the fifth step plane (117), the sixth step plane (118) are all located on the outer template (11); the first end plane (123) and the second end plane (124) are all located on the insulation layer (12); the third step plane (133), the fourth step plane (124), the fifth step plane (123), the sixth step plane (124 The surface (134), the seventh step plane (135), and the eighth step plane (136) are all located on the inner template (13); the second step plane (116), the first end plane (123), the third step plane (133), the sixth step plane (118), the second end plane (124), and the seventh step plane (135) are all flush; the second step plane (116) extends beyond the first step plane (115) along the circumference of the casting cavity (2); the fourth step plane (134) extends beyond the third step plane (133) along the circumference of the casting cavity (2); the seventh step plane (135) extends beyond the eighth step plane (136) along the circumference of the casting cavity (2); the fifth step plane (117) extends beyond the sixth step plane (118) along the circumference of the casting cavity (2).

2. The bridge pier casting formwork (1) according to claim 1, characterized in that, The outer wall of the outer template (11) is provided with a plurality of circumferential reinforcing ribs (111) and / or a plurality of axial reinforcing ribs (112); each circumferential reinforcing rib (111) is uniformly arranged along the axial direction of the outer template (11); each axial reinforcing rib (112) is uniformly arranged around the circumference of the outer template (11).

3. The bridge pier casting formwork (1) according to claim 1, characterized in that, Both the outer template (11) and the inner template (13) are steel plates; the insulation layer (12) includes insulation cotton or polystyrene board.

4. The bridge pier casting formwork (1) according to claim 1, characterized in that, The support column (17) is cylindrical; or the support column (17) is in the shape of an "eight" character, and each support column (17) alternates with the end of the outer template (11) connected to the outer template (11) around the circumference.

5. The bridge pier casting formwork (1) according to any one of claims 1 to 4, characterized in that, The top of the outer template (11) is provided with a first snap-fit ​​groove (113) and the bottom is provided with a second snap-fit ​​groove (114). In use, the outer template (11) can be snapped into the second snap-fit ​​groove (114) of another outer template (11) through the first snap-fit ​​groove (113).

6. The bridge pier casting formwork (1) according to claim 5, characterized in that, The inner template (13) is provided with a third snap-fit ​​groove (131) at the top and a fourth snap-fit ​​groove (132) at the bottom; in use, the inner template (13) can be snapped into the fourth snap-fit ​​groove (132) of another inner template (13) through the third snap-fit ​​groove (131).

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