Pile foundation steel casing positioning device
By designing the ring frame and positioning mechanism of the pile foundation steel casing positioning device, the problem of verticality control of steel casings on water was solved, achieving rapid and accurate positioning of steel casings and improving construction quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN MUNICIPAL CONSTR GROUP
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-03
AI Technical Summary
In the construction of steel trestle bridges over water, the positioning accuracy and verticality of long steel casings are difficult to control effectively, affecting the quality and efficiency of pile foundation construction.
The steel casing positioning device for pile foundations includes a main frame with a ring frame structure and circumferentially distributed positioning mechanisms. Through the simultaneous action of multiple positioning mechanisms, the steel casing is adjusted to be vertical. The threaded engagement of the positioning screws and nuts, along with the universal ball joint, improves the adjustment efficiency.
It enables rapid vertical adjustment of steel casing, improves construction accuracy and efficiency, adapts to the construction needs of different pile diameters, and reduces the difficulty of manual adjustment and construction costs.
Smart Images
Figure CN224451635U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bridge construction technology, and in particular relates to a positioning device for steel casing of pile foundation. Background Technology
[0002] With the rapid expansion of my country's urban expressway network, bridge construction in different regions and environments is also proceeding at a fast pace. Drilled piles are commonly used as the foundation for bridge construction, and steel casings, which serve guiding and positioning functions, are further employed in this process. The use of steel casings allows for more accurate control of pile misalignment and verticality. Especially when constructing pile foundations for steel trestle bridges over water, long steel casings are essential. These casings effectively prevent mud generated during pile drilling from flowing into the water, thus protecting the aquatic environment. However, the positioning accuracy and verticality of long casings are difficult to control effectively when installed on steel trestle bridges. To ensure the quality of pile foundation construction and improve efficiency, the positioning and installation of steel casings should be precise and rapid. The positioning device for the steel casings should be easy to install, disassemble, and transport, and adaptable to pile foundation construction with different diameters. Utility Model Content
[0003] This utility model provides a positioning device for steel casing of pile foundation, which mainly solves the problem of how to adjust the steel casing to be vertical during the construction of steel casing on water.
[0004] This application provides a positioning device for steel casing pile foundations, mainly used in the construction of steel casing piles, characterized by comprising:
[0005] The main frame is a ring-shaped frame structure with a hollow interior for the insertion of the steel casing;
[0006] The positioning mechanism, comprising at least three, is circumferentially and fixedly mounted on the main frame, such that all positioning mechanisms are located on the same horizontal plane when the main frame is horizontally mounted on the foundation; the positioning mechanism is configured to move forward and backward toward the center of the main frame.
[0007] The aforementioned pile foundation steel casing positioning device sets up multiple positioning mechanisms around the main frame of a ring-shaped frame structure. With the simultaneous action of multiple positioning mechanisms, the steel casing located inside the main frame is pushed towards the center of the main frame. The positioning mechanisms are adjusted individually so that the steel casing can quickly reach verticality, which effectively solves the problem of how to adjust the steel casing to verticality during the construction of steel casings on water.
[0008] In one embodiment, the positioning mechanism includes a mounting base, a positioning screw, and a positioning nut. The mounting base is fixedly mounted on the main frame, the positioning nut is fixedly mounted on the mounting base, and the positioning screw is threadedly connected to the positioning nut.
[0009] In one embodiment, the end of the positioning screw facing the steel casing is configured as an arc-shaped end.
[0010] In one embodiment, a universal ball is provided at the end of the positioning screw facing the steel casing.
[0011] In one embodiment, the universal ball is fixed on a connecting sleeve, the connecting sleeve has an internal thread, and the connecting sleeve is threadedly connected to the end of the positioning screw facing the steel casing.
[0012] In one embodiment, the main frame is a frame structure with a square cross-section, and the positioning mechanism is fixedly installed at the midpoint of each of its four sides.
[0013] In one embodiment, the main frame is formed by connecting multiple angle steels with bolts, and the mounting base is also fixedly connected to the angle steels with bolts.
[0014] In one embodiment, the upper surface of the main frame is provided with a plurality of female connectors, and the lower surface is provided with male connectors that match the number and position of the female connectors. When multiple sets of the pile foundation steel casing positioning devices can be used in combination, adjacent two main frames are connected and engaged by the female connectors and male connectors.
[0015] In one embodiment, at least one bubble level is also installed on the main frame.
[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description
[0017] The accompanying drawings in this application are for illustrating preferred embodiments and to facilitate a clear understanding by those skilled in the art of various other advantages and benefits, and should not be construed as limiting the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.
[0018] Figure 1 This is a top view schematic diagram of the positioning device for the steel casing of the pile foundation in one embodiment of this application.
[0019] Figure 2 This is a schematic diagram of the positioning mechanism 200 in one embodiment of this application.
[0020] Figure 3 This is a schematic diagram of the positioning screw 220 in one embodiment of this application.
[0021] Figure 4 This is a side view of the positioning device for the steel casing of the pile foundation in one embodiment of this application.
[0022] Figure 5 This is a schematic diagram of the assembly of two pile foundation steel casing positioning devices in one embodiment of this application.
[0023] Figure 6 This is a top view schematic diagram of the positioning device for the steel casing of the pile foundation in one embodiment of this application.
[0024] The reference numerals in the attached diagrams are as follows: main frame 100, bubble level 110, female connector 121, male connector 122, positioning mechanism 200, mounting base 210, bolt hole 211, positioning screw 220, universal ball joint 221, connecting sleeve 222, positioning nut 230, and steel sleeve 300. Detailed Implementation
[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0027] In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly specified.
[0028] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of 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 the embodiments of this application.
[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0030] See Figure 1 As shown, one embodiment of this application provides a positioning device for a pile foundation steel casing, mainly used to assist in positioning and adjusting the position of the steel casing 300 during construction. The positioning device mainly includes a main frame 100, which is a ring-shaped frame structure. The diameter of its hollow inscribed circle needs to be larger than the outer diameter of the steel casing 300 for insertion. At least three positioning mechanisms 200 are installed on the main frame 100. All positioning mechanisms 200 are circumferentially and evenly fixedly installed on the main frame 100. When the main frame 100 is horizontally installed on the foundation, all positioning mechanisms 200 are located on the same horizontal plane. The positioning mechanisms 200 are configured to move forward and backward toward the center of the main frame 100. During the construction of the steel casing 300, the main frame 100 is first fixedly installed on the work platform to ensure it is level. Then, the steel casing 300 is hoisted into the main frame 100. A laser plumb line is used to check the verticality of the steel casing 300. Multiple positioning mechanisms 200 act simultaneously on multiple directions of the outer wall of the steel casing 300, pushing the steel casing 300 toward the center of the main frame 100. The positioning mechanisms 200 are adjusted to make the steel casing 300 quickly reach verticality, which effectively solves the problem of how to adjust the steel casing to verticality during the construction of steel casings on water.
[0031] Understandably, during bridge construction, the main frame 100 is typically fixedly installed on a steel trestle working platform. First, the platform is marked out and positioned, then anchor bolts are installed, and the main frame 100 is then secured to the platform using these bolts. This installation method is only illustrated using a steel trestle working platform as an example; different construction sites will have different methods, and designs can be tailored to the specific site conditions. The installation of the main frame 100 is not limited here.
[0032] See Figure 1 and Figure 2As shown, in some embodiments, the positioning mechanism 200 includes a mounting base 210, a positioning screw 220, and a positioning nut 230. The mounting base 210 is fixedly mounted on the main frame 100, and the positioning nut 230 is fixedly mounted on the mounting base 210. The positioning screw 220 and the positioning nut 230 are threadedly connected. By rotating the positioning nut 230, the end of the positioning nut 230 abuts against the steel casing 300, and pushes the steel casing 300, thereby adjusting the center deviation of the steel casing 300 (accuracy ≤ 5mm). The use of the positioning screw 220 and the positioning nut 230 results in a simple structure and convenient and quick adjustment.
[0033] To facilitate the adjustment of the positioning screw 220, a rotating handle can be installed on the positioning screw 220. Rotating the positioning screw 220 by rotating the handle can save effort.
[0034] It should be noted that the positioning screw 220 and positioning nut 230 used in this embodiment are mainly used to achieve the purpose of adjustment by utilizing the principle of threaded engagement. The positioning screw 220 can be any rod with external threads, and the positioning nut 230 can be any sleeve with internal threads. This should not be interpreted as a limitation.
[0035] In a preferred embodiment, see Figure 2 As shown, the end of the positioning screw 220 facing the steel casing 300 is configured with an arc-shaped end. Since this end of the positioning screw 220 is the component that contacts the outer wall of the steel casing 300, designing it as a smooth arc-shaped end allows the positioning screw 220 to rotate more smoothly and effortlessly against the outer wall of the steel casing 300. Grease can also be applied when needed to increase lubrication and make the rotation of the positioning screw 220 even smoother.
[0036] In another preferred embodiment, see Figure 3 As shown, we have installed a universal ball 221 at the end of the positioning screw 220 facing the steel casing 300. The universal ball 221 contacts the outer wall of the steel casing 300. By upgrading the original sliding friction to rolling friction, the smoothness of the rotation of the positioning screw 220 is further improved.
[0037] In one specific implementation, see Figure 3 The universal ball 221 is fixed on a connecting sleeve 222. The connecting sleeve 222 has an internal thread and is threaded to the end of the positioning screw 220 facing the steel casing 300.
[0038] See Figure 1 and 4In one specific implementation, considering the complexity, reliability, and performance of the results, we design the main frame 100 as a frame structure with a square cross-section, and fix the positioning mechanism 200 at the midpoint of its four sides. The four positioning mechanisms 200 are arranged symmetrically in all directions to ensure the accuracy of adjustment, and to prevent the adjustment speed from slowing down due to excessive adjustment of the positioning mechanism 200. The cost can also be controlled, and the square main frame 100 also facilitates the installation and positioning of the main frame 100.
[0039] In one specific implementation, see Figure 1 and 4 The main frame 100 is made of multiple angle steels connected by bolts. The mounting base 210 is also fixedly connected to the angle steels by bolts. The bolted connection forms an assembly structure, which is convenient for disassembly, installation and transportation, and also convenient for storage.
[0040] See Figure 4 and 5 In some embodiments, the upper surface of the main frame 100 is provided with a plurality of female connectors 121, and the lower surface is provided with male connectors 122 that match the number and position of the female connectors 121; when multiple sets of pile foundation steel casing positioning devices can be used in combination, two adjacent main frames 100 are connected and engaged by the female connectors 121 and the male connectors 122.
[0041] Multiple sets of pile foundation steel casing positioning devices can be used in combination to adjust the verticality of the steel casing 300 from three positions: upper, middle, and lower, improving the accuracy of the adjustment and preventing the steel casing 300 from tilting.
[0042] Specifically, the female connector 121 and the male connector 122 can be made of steel pipes of different thicknesses, such as the outer diameter of the female connector 121 being equal to the inner diameter of the male connector 122; or they can be made of angle steel with staggered positions, with the positions of the female connector 121 and the male connector 122 being staggered by the thickness of one angle steel. Examples are not listed here.
[0043] See Figure 6 In some embodiments, at least one bubble level 110 is also mounted on the main frame 100 to assist the main frame 100 in adjusting its levelness during installation.
[0044] Specifically, a bubble level 110 can be installed on each side of the main frame 100 to facilitate leveling while ensuring the accuracy of the adjustment, thus ensuring the horizontal installation of the main frame 100.
[0045] In summary, the beneficial effects of this utility model are:
[0046] 1) Modular assembly design: All components are connected with standardized holes and bolts, and the main frame size can be flexibly adjusted according to the pile diameter to adapt to different construction scenarios.
[0047] 2) Multi-level positioning (combination of multiple sets of pile foundation steel casing positioning devices): Through the coordinated adjustment of multiple sets of pile foundation steel casing positioning devices in the upper, middle and lower layers, the deviation error of the steel casing is eliminated layer by layer, ensuring that the verticality error is less than 1‰.
[0048] 3) Rapid turnover capability: The main frame can be disassembled into independent components, which facilitates transportation, has a high reuse rate, and greatly reduces construction costs.
[0049] 4) Environmental adaptability: Suitable for complex working conditions such as steel trestle bridges over water and soft soil foundations.
[0050] This device can significantly improve the installation efficiency of steel casings during construction and reduce the difficulty of manual adjustment. It is especially suitable for the precise positioning requirements of large-diameter and ultra-long steel casings.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no contradiction or conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A positioning device for steel casing of pile foundation, mainly used in the construction of steel casing (300), characterized in that, include: The main frame (100) is a ring frame structure with a hollow interior for the insertion of the steel casing (300); Positioning mechanisms (200), at least three of which are circumferentially and uniformly fixedly installed on the main frame (100), all of which are located on the same horizontal plane when the main frame (100) is horizontally installed on the foundation; the positioning mechanisms (200) are configured to move forward and backward toward the center of the main frame (100).
2. A pile casing positioning apparatus as claimed in claim 1, wherein: The positioning mechanism (200) includes a mounting base (210), a positioning screw (220), and a positioning nut (230). The mounting base (210) is fixedly mounted on the main frame (100), and the positioning nut (230) is fixedly mounted on the mounting base (210). The positioning screw (220) and the positioning nut (230) are threadedly connected.
3. A pile casing positioning apparatus as claimed in claim 2, wherein: The end of the positioning screw (220) facing the steel casing (300) is configured as an arc-shaped end.
4. A pile casing positioning apparatus as claimed in claim 2, wherein: The positioning screw (220) is equipped with a universal ball (221) at the end facing the steel casing (300).
5. A pile casing positioning apparatus as claimed in claim 4, wherein: The universal ball (221) is fixed on a connecting sleeve (222), the connecting sleeve (222) has an internal thread, and the connecting sleeve (222) is threadedly connected to the end of the positioning screw (220) facing the steel casing (300).
6. A pile casing positioning apparatus as claimed in claim 2, wherein: The main frame (100) is a frame structure with a square cross-section, and the positioning mechanism (200) is fixedly installed at the midpoint of each of its four sides.
7. A pile casing positioning apparatus as claimed in claim 6, wherein: The main frame (100) is made of multiple angle steels connected by bolts, and the mounting base (210) is also fixedly connected to the angle steels by bolts.
8. A pile casing positioning device as claimed in claim 1, wherein: The upper surface of the main frame (100) is provided with a plurality of female plugs (121), and the lower surface is provided with male plugs (122) that match the number and position of the female plugs (121). When multiple sets of the pile foundation steel casing positioning devices can be used in combination, two adjacent main frames (100) are connected and engaged by the female plugs (121) and the male plugs (122).
9. A pile casing positioning device as claimed in claim 1, characterised in that: At least one bubble level (110) is also installed on the main frame (100).