A cylindrical pier pouring form positioning device

Abstract

The application relates to a cylindrical pier pouring formwork positioning device, belonging to the field of bridge engineering, which comprises a positioning base and a connecting assembly, the positioning base is fixedly connected with the ground, a pair of shaft holes are formed in the positioning base, the pair of shaft holes are coaxial with the foundation pile, a matching body is fixedly arranged above the positioning base, the lower end of a cylindrical formwork is provided with a butt joint structure used for mutually matching with the matching body, and the connecting assembly is used for connecting the cylindrical formwork and the positioning base. The positioning base is adopted as the base for installing the cylindrical formwork on the ground, has the functions of posture adjustment and connection fixation, and has high adjustment precision and operation convenience.

Description

Technical Field

[0001] This application relates to the field of bridge engineering, and in particular to a positioning device for casting formwork of cylindrical piers. Background Technology

[0002] A column-type pier refers to a pier whose body is composed of one or more columns. In engineering, the columns of the pier are generally cylindrical.

[0003] The cylindrical bridge piers are constructed using a cast-in-place method. Foundation piles are driven into the ground, and then a reinforcing cage is fixed onto the ground above the piles, followed by the erection of a casting formwork system. Once completed, the casting formwork system is cylindrical, with the reinforcing cage and the cylindrical formwork coaxial. The formwork consists of multiple layers of vertically arranged cylinders, with adjacent cylinders connected by flange structures. Before pouring, the orientation of the casting formwork must be adjusted to improve the verticality of its axis.

[0004] In related technologies, the adjustment of the formwork is usually done manually. That is, the pouring formwork is not fixed to the ground after it is erected. The operator analyzes the verticality of the pouring formwork axis to the ground by manual measurement or total station measurement. Then, the formwork is locally raised by tools such as crowbars and temporary process supports to correct the posture of the pouring formwork. The operation has low accuracy and is time-consuming and labor-intensive. Utility Model Content

[0005] To address the aforementioned issues, this application provides a positioning device for casting formwork of cylindrical piers.

[0006] The technical solution of the cylindrical pier casting formwork positioning device provided in this application is as follows:

[0007] A cylindrical pier casting template positioning device includes a positioning base and a connecting component. The positioning base is fixedly connected to the ground. The positioning base has an alignment hole that is coaxial with the foundation pile. A mating body is fixedly installed above the positioning base. The lower end of the cylindrical template has a docking structure for mating with the mating body. The connecting component is used to connect the cylindrical template and the positioning base.

[0008] By adopting the above technical solution, the positioning base serves as an intermediate body connecting the ground and the cylindrical template. After being connected to the cylindrical template, the positioning base and the cylindrical template are adjusted to each other through the docking structure and connecting components, resulting in high precision and a stable connection.

[0009] Preferably, the mating body is an arched ring, which is coaxial with the shaft hole. The side of the arched ring away from the positioning base is a convex arc surface, and the center of the convex arc surface of the arched ring is located on the axis of the shaft hole. The mating structure is a mating ring groove, which is located on the inner wall of the end face of the cylindrical template and is coaxial with the cylindrical template. The groove surface of the mating ring groove is a concave arc surface. When the groove surface of the mating ring groove and the convex arc surface of the arched ring are in contact, there is a gap between the lower end face of the cylindrical template and the positioning base.

[0010] Preferably, the connecting assembly includes multiple diagonal tie rods, one end of which is connected to the ground and the other end is connected to the top side wall of the cylindrical template. The middle section of the diagonal tie rod is provided with a telescopic structure for adjusting the length of the diagonal tie rod.

[0011] Preferably, the telescopic structure is a threaded cylinder, and the diagonal tie rod includes two coaxial split rods. The threaded cylinder is rotatably connected to one of the split rods and threadedly connected to the other split rod.

[0012] Preferably, the connecting assembly includes a connecting screw and a connecting nut. A connecting flange is coaxially fixedly connected to the side wall of the cylindrical template. The connecting flange has multiple connecting waist-shaped holes. The length direction of the connecting waist-shaped holes is the radial direction of the connecting flange. The connecting waist-shaped holes allow the connecting screw to pass through. The connecting nut is threaded onto the connecting screw and is located on the side of the connecting flange away from the positioning base.

[0013] Preferably, the inner wall of the arched ring is flush with the inner wall of the shaft hole, and the inner diameter of the arched ring and the inner diameter of the shaft hole gradually increase from top to bottom, with the upper inner diameter of the arched ring being larger than the inner diameter of the cylindrical template.

[0014] Preferably, the positioning base includes two split bases, the arched ring includes two sub-rings, each sub-ring is fixedly connected to a split base, a splicing sleeve is fixedly connected to the split base, the positioning base also includes tie bolts, the tie bolts pass through the splicing sleeves of both split bases simultaneously, splicing protrusions are fixedly connected to opposite sides of the two split bases and splicing grooves are formed, the splicing protrusion on one split base is inserted into the splicing groove of the other split base.

[0015] This application includes at least one of the following beneficial technical effects:

[0016] Since the ground level at the top of the foundation pile is unknown, the cylindrical formwork needs to be angled relative to the positioning base. The connecting components can directly fix the cylindrical formwork after the angle is adjusted, which is highly accurate and easy to operate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the structure of the positioning base in the embodiments of this application.

[0018] Figure 2 This is a cross-sectional view of the overall structure of the cylindrical pier casting template positioning device in the embodiments of this application.

[0019] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0020] Explanation of reference numerals in the attached drawings: 1. Foundation pile; 2. Positioning base; 21. Axis hole; 22. Split base; 221. Splicing protrusion; 222. Splicing groove; 23. Splicing sleeve; 24. Arch ring; 241. Split ring body; 3. Cylindrical template; 31. Butt ring groove; 32. Connecting flange; 321. Connecting waist-shaped hole; 4. Connecting assembly; 41. Connecting screw; 42. Connecting nut; 43. Diagonal tie rod; 431. Split rod; 432. Threaded cylinder. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0022] This application discloses a positioning device for casting formwork of cylindrical piers, such as... Figure 1 and 2 As shown, the system includes a positioning base 2 and a connecting assembly 4. The positioning base 2 is fixedly connected to the ground by anchor bolts (not shown in the figure). The connecting assembly 4 is used to connect the cylindrical template 3 to the top of the positioning base 2. The positioning base 2 has an alignment hole 21. Foundation piles 1 are pre-driven into the ground. After the positioning base 2 is installed on the ground, the alignment hole 21 and the foundation piles 1 are coaxial. The reinforcing cage extending above the foundation piles 1 passes coaxially through the alignment hole 21.

[0023] like Figure 1 and 2 As shown, a mating body is fixedly installed above the positioning base 2, and the lower end of the cylindrical template 3 is provided with a docking structure for mating with the mating body. The mating body is an arched ring 24, which is coaxial with the shaft hole 21. The side of the arched ring 24 facing away from the positioning base 2 is a convex arc surface, and the center of the convex arc surface of the arched ring 24 is located on the axis of the shaft hole 21. The docking structure is a docking ring groove 31, which is located on the inner wall of the end face of the cylindrical template 3 and is coaxial with the cylindrical template 3. The groove surface of the docking ring groove 31 is a concave arc surface. When the cylindrical template 3 is placed above the shaft hole 21, the groove surface of the docking ring groove 31 will fit and abut against the convex arc surface of the arched ring 24. When the axis of the cylindrical template 3 is perpendicular to the upper surface of the positioning base 2, there is a uniform gap of 1.5 cm between the lower end face of the cylindrical template 3 and the positioning base 2.

[0024] like Figure 1and 2 As shown, to facilitate the installation of the positioning base 2 on the ground with the steel cage, the positioning base 2 is a splicing assembly structure, which includes two split bases 22. The arched ring 24 includes two sub-rings 241. Each sub-ring 241 is fixedly connected to a split base 22. A splicing sleeve 23 is fixedly connected to the split base 22. The axis of the splicing sleeve 23 is in the horizontal direction. When the two split bases 22 are connected to each other, the splicing sleeves 23 connected to them are coaxial. The positioning base 2 also includes tie bolts (not shown in the figure). The tie bolts pass through the splicing sleeves 23 of the two split bases 22 at the same time, thereby applying opposing tensile forces to the two split bases 22 respectively. Two separate bases 22 are fixedly connected to each other on one side with splicing protrusions 221 and splicing grooves 222. Before connecting with tie bolts, the splicing protrusions 221 on one of the separate bases 22 are inserted into the splicing grooves 222 of the other separate base 22 to achieve positioning and engagement between the two.

[0025] like Figure 1 and 2 As shown, the connecting assembly 4 includes a connecting screw 41 and a connecting nut 42. A connecting flange 32 is coaxially fixed to the side wall of the cylindrical template 3, near the end close to the positioning base 2. The connecting flange 32 has four connecting waist-shaped holes 321 arranged in a circumferential array around the cylindrical template 3, with the length direction of the connecting waist-shaped holes 321 being radial to the connecting flange 32. The connecting waist-shaped holes 321 allow the connecting screw 41 to pass through. The connecting nut 42 is threaded onto the connecting screw 41 and located on the side of the connecting flange 32 away from the positioning base 2. After tightening each connecting nut 42, the four connecting nuts 42 vertically press against the connecting flange 32, thus fixing the connecting flange 32 and the cylindrical template 3 relative to the positioning base 2. Adjusting the tightness of different connecting nuts 42 allows for adjustment of the angle and posture of the connecting flange 32 relative to the positioning base 2, thereby achieving angle adjustment of the cylindrical template 3.

[0026] like Figure 2 and 3As shown, the cylindrical template 3 is composed of multiple semi-cylindrical iron plates spliced ​​and fixed together by bolts. In this embodiment, there are three layers. The connecting assembly 4 also includes four diagonal tie rods 43. One end of the diagonal tie rod 43 is connected to the ground, and the other end is connected to the top side wall of the cylindrical template 3. The four diagonal tie rods 43 are arranged in a circumferential array around the cylindrical template 3. One end of the diagonal tie rod 43 is connected to the ground, and the other end is connected to the top side wall of the cylindrical template 3. It applies tension to the top of the cylindrical template 3 based on the ground. The middle section of the diagonal tie rod 43 is equipped with a telescopic structure, which is used to adjust the length of the diagonal tie rod 43. A single diagonal tie rod 43 includes two coaxial split rods 431. One end of one split rod 431 is hinged to the ground, and one end of the other split rod 431 is hinged to the side wall of the uppermost semi-cylindrical iron plate of the cylindrical template 3. The telescopic structure is a threaded cylinder 432. The threaded cylinder 432 is coaxially rotatably connected to the lower split rod 431 and coaxially threadedly connected to the upper split rod 431. Thus, when the threaded cylinder 432 rotates, its axial position and that of the upper split rod 431 change, thereby adjusting the tension on the cylindrical template 3.

[0027] like Figure 2 and 3 As shown, the inner wall of the arch ring 24 is flush with the inner wall of the shaft hole 21. The inner diameter of the upper end of the arch ring 24 is larger than the inner diameter of the cylindrical template 3, and the inner diameters of the arch ring 24 and the shaft hole 21 gradually increase from top to bottom. During pouring, the concrete forms a truncated cone with a radial dimension larger than the diameter of the pier at the positioning base 2 and the arch ring 24. This truncated cone is used to improve the stability of the connection between the concrete column and the ground.

[0028] The implementation principle of the cylindrical pier casting formwork positioning device in this application embodiment is as follows:

[0029] After the foundation pile 1 is constructed, the positioning base 2 is assembled and fixed on the ground above the foundation pile 1, and then the steel cage is fixed. Then, the cylindrical formwork 3 is assembled from bottom to top on the positioning base 2. With the help of a total station and a suspended plumb bob, the verticality of the bottom of the cylindrical formwork 3 to the ground is adjusted by connecting screws 41 and connecting nuts 42, and the verticality of the top of the cylindrical formwork 3 to the ground is adjusted by diagonal tie rods 43. After the adjustment is completed, concrete is poured directly into the cylindrical formwork 3.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning device for casting formwork of a cylindrical pier, characterized in that: The system includes a positioning base (2) and a connecting component (4). The positioning base (2) is fixedly connected to the ground. The positioning base (2) has a shaft hole (21) and is coaxial with the foundation pile (1). A mating body is fixedly installed above the positioning base (2). The lower end of the cylindrical template (3) is provided with a docking structure for mating with the mating body. The connecting component (4) is used to connect the cylindrical template (3) and the positioning base (2) to each other.

2. The cylindrical pier casting formwork positioning device according to claim 1, characterized in that: The mating body is an arched ring (24), which is coaxial with the shaft hole (21). The side of the arched ring (24) away from the positioning base (2) is a convex arc surface, and the center of the convex arc surface of the arched ring (24) is located on the axis of the shaft hole (21). The docking structure is a docking ring groove (31), which is located on the inner wall of the end face of the cylindrical template (3) and is coaxial with the cylindrical template (3). The groove surface of the docking ring groove (31) is a concave arc surface. When the groove surface of the docking ring groove (31) and the convex arc surface of the arched ring (24) fit together, there is a gap between the lower end face of the cylindrical template (3) and the positioning base (2).

3. The cylindrical pier casting formwork positioning device according to claim 2, characterized in that: The connecting assembly (4) includes multiple diagonal braces (43), one end of which is connected to the ground and the other end is connected to the top side wall of the cylindrical template (3). The middle section of the diagonal brace (43) is provided with a telescopic structure, which is used to adjust the length of the diagonal brace (43).

4. The cylindrical pier casting formwork positioning device according to claim 3, characterized in that: The telescopic structure is a threaded cylinder (432), and the inclined rod (43) includes two coaxial split rods (431). The threaded cylinder (432) is rotatably connected to one of the split rods (431) and threadedly connected to the other split rod (431).

5. A cylindrical pier casting formwork positioning device according to any one of claims 2-4, characterized in that: The connecting assembly (4) includes a connecting screw (41) and a connecting nut (42). A connecting flange (32) is coaxially fixedly connected to the side wall of the cylindrical template (3). The connecting flange (32) has multiple connecting waist-shaped holes (321). The length direction of the connecting waist-shaped holes (321) is the radial direction of the connecting flange (32). The connecting waist-shaped holes (321) allow the connecting screw (41) to pass through. The connecting nut (42) is threaded onto the connecting screw (41) and is located on the side of the connecting flange (32) away from the positioning base (2).

6. A cylindrical pier casting formwork positioning device according to any one of claims 2-4, characterized in that: The inner wall of the arched ring (24) is flush with the inner wall of the shaft hole (21). Along the top-to-bottom direction, the inner diameter of the arched ring (24) and the inner diameter of the shaft hole (21) gradually increase. The upper inner diameter of the arched ring (24) is greater than the inner diameter of the cylindrical template (3).

7. A cylindrical pier casting formwork positioning device according to claim 6, characterized in that: The positioning base (2) includes two split bases (22), and the arched ring (24) includes two sub-rings (241). Each sub-ring (241) is fixedly connected to a split base (22). A splicing sleeve (23) is fixedly connected to the split base (22). The positioning base (2) also includes tie bolts. The tie bolts pass through the splicing sleeves (23) of both split bases (22). A splicing protrusion (221) is fixedly connected to one side of the two split bases (22) and a splicing groove (222) is provided. The splicing protrusion (221) on one of the split bases (22) is inserted into the splicing groove (222) of the other split base (22).

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