A prefabricated box girder wedge block slope adjusting device

Abstract

The application provides a prefabricated box girder wedge block slope adjusting device, which comprises a prefabricated pedestal, both ends of the prefabricated pedestal are provided with wedge block slope adjusting grooves, the depth of the wedge block slope adjusting grooves is greater than the design height of the wedge block, and the length and the width of the wedge block slope adjusting grooves are consistent with those of the wedge block; a plurality of groups of adjustable supporting pieces are uniformly arranged in the wedge block slope adjusting grooves, the adjustable supporting pieces are composed of a connecting sleeve vertically arranged in the wedge block slope adjusting groove and a bolt threadedly matched with the connecting sleeve; a dynamic compensation layer is laid in the wedge block slope adjusting groove and covers the adjustable supporting pieces; a pre-buried bearing plate is arranged on the upper surface of the dynamic compensation layer, and the edge of the pre-buried bearing plate is fixedly connected with the side wall of the wedge block slope adjusting groove through an adhesive area. The height of the bolt is adjusted to the design position, the dynamic compensation layer is laid in the wedge block slope adjusting groove, the surface of the dynamic compensation layer is smoothed, and the pre-buried bearing plate is installed on the upper surface of the dynamic compensation layer and fixed, so that the problem that a traditional fixed prefabricated pedestal cannot adapt to different prefabricated box girder slopes is solved.

Description

Technical Field

[0001] This application relates to the field of precast box girder construction technology in bridge engineering, and in particular to a wedge block slope adjustment device for precast box girders. Background Technology

[0002] In bridge construction, precast box girders are widely used in highway bridge construction due to their advantages in load-bearing performance and appearance. Since different bridge projects have different design requirements for cross slope and longitudinal slope, it is necessary to precisely adjust the bottom slope parameters of the precast box girder to ensure that the actual alignment of the box girder after erection is completely consistent with the design alignment.

[0003] In existing technologies, the slope of precast box girders needs to be adjusted by wedge blocks at the bottom of the girders. These wedge blocks must be constructed simultaneously with the precast box girder body on the precast platform, and the slope is adapted by precasting wedge blocks with fixed slope.

[0004] However, this method relies on the height matching between the precast platform and the wedge block, requiring separate configuration of precast platforms or formwork for different slopes and beam lengths. Since precast box girders consist of a large number of segments, each with varying transverse and longitudinal slope parameters, fixed precast platforms or customized formwork cannot adapt to the changing slope requirements, resulting in low construction efficiency. Utility Model Content

[0005] This application provides a precast box girder wedge block slope adjustment device to solve the problems of insufficient slope adjustment accuracy, low construction efficiency and poor structural stability of wedge blocks in the prior art.

[0006] To achieve the above objectives, this application provides a precast box girder wedge block slope adjustment device, comprising:

[0007] The precast platform is equipped with wedge-shaped block slope adjustment grooves at both ends;

[0008] Multiple sets of adjustable support components are evenly arranged in the slope adjustment groove of the wedge block. Each set of adjustable support components includes a vertically set connecting sleeve and a bolt that is threaded to it. The vertical axis of the bolt coincides with the vertical axis of the connecting sleeve.

[0009] The dynamic compensation layer is laid in the slope adjustment groove, and the filling depth of the dynamic compensation layer changes with the bolt extension height.

[0010] An embedded bearing plate is set on the upper surface of the dynamic compensation layer and is fixedly connected to the side wall of the wedge-shaped block slope adjustment groove through the bonding area.

[0011] In one optional embodiment, the depth of the wedge slope adjustment groove is greater than the design height of the wedge block, and the length and width dimensions of the wedge slope adjustment groove are consistent with the design dimensions of the wedge block; the inner wall of the wedge slope adjustment groove is provided with a metal reinforcement frame, the height of the metal reinforcement frame is the same as the depth of the wedge slope adjustment groove, and it covers the entire circumference of the inner wall of the wedge slope adjustment groove in the horizontal direction.

[0012] In one optional embodiment, the prefabricated platform is provided with a pre-embedded hole, and the connecting sleeve is embedded in the pre-embedded hole and fixedly connected to the prefabricated platform.

[0013] In one optional embodiment, the bolt is provided with axially spaced height scale markings; the side wall of the wedge block slope adjustment groove is provided with a scale calibration reference line, which works in conjunction with the height scale markings to control the bolt extension height.

[0014] In one optional embodiment, a pressure diffusion base is provided at the bottom of the connecting sleeve, the outer diameter of which is larger than the outer diameter of the connecting sleeve.

[0015] This application achieves a dual improvement in height adjustment and structural stability through the coordinated operation of adjustable supports and a dynamic compensation layer. The bolts in the adjustable supports control the height via a threaded mechanism, with precise slope angle settings using graduated markings. Simultaneously, the height changes caused by bolt adjustments are filled by the dynamic compensation layer, eliminating gaps between the adjustable supports and the embedded bearing plate. This solves problems such as large errors in manual slope adjustment and redundant construction of precast platforms in traditional processes, reducing the prefabrication cost of bridge engineering and improving the construction efficiency and quality control level of precast bridge components. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the precast box girder bottom wedge block adjustment device provided in the embodiments of this application;

[0018] Figure 2 This is a schematic cross-sectional view of the precast box girder wedge block slope adjustment device provided in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the adjustable support structure of the precast box girder wedge block slope adjustment device provided in the embodiments of this application.

[0020] Illustration:

[0021] Among them, 1. Precast platform; 2. Adjustable support; 21. Connecting sleeve; 211. Pressure diffusion base; 22. Bolt; 3. Dynamic compensation layer; 4. Embedded bearing plate; 5. Metal reinforced frame; 100. Wedge block slope adjustment groove. Detailed Implementation

[0022] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.

[0023] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0024] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0025] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0026] In the field of precast box girder construction for bridges, the traditional method involves adjusting the slope of the wedge-shaped blocks at the bottom of the girder using fixed precast platforms. These fixed platforms must be strictly matched to the length and slope parameters of the precast box girder, achieving slope adaptation through precast wedge-shaped blocks with a fixed slope. However, with numerous precast box girder segments and varying transverse and longitudinal slope parameters for each segment, fixed precast platforms cannot accommodate diverse slopes. This necessitates repeated reconstruction of the precast platforms for different parameters, resulting in low construction efficiency and high costs.

[0027] To address the aforementioned issues, this application provides a precast box girder wedge block slope adjustment device, comprising: a precast platform 1, adjustable support members 2, a dynamic compensation layer 3, and a pre-embedded bearing plate 4. The precast platform 1 has wedge block slope adjustment grooves 100 at both ends; multiple sets of adjustable support members 2 are evenly arranged within the wedge block slope adjustment grooves 100, each set including a vertically arranged connecting sleeve 21 and a threaded bolt 22; the dynamic compensation layer 3 is laid within the wedge block slope adjustment grooves 100 and covers the bolts 22; the pre-embedded bearing plate 4 is disposed on the upper surface of the dynamic compensation layer 3, and its edge is fixedly connected to the sidewall of the wedge block slope adjustment groove 100 through a first bonding area and a second bonding area.

[0028] The precast box girder wedge block slope adjustment device sets the elevation benchmark point by adjusting the extension height of bolts 22. A dynamic compensation layer 3 fills the gaps between bolts 22 to form a continuous slope. An embedded bearing plate 4, fixed by adhesive bonding, provides a sealed casting base. By adjusting the height of bolts 22 instead of rebuilding the precast platform, multi-parameter adaptation of a single precast platform is achieved. The adhesive sealing interface prevents concrete grout leakage, ensuring the quality of the wedge block molding. Compared to a fixed precast platform, this application's solution improves construction efficiency and reduces resource consumption.

[0029] The following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0030] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The precast platform 1 is the load-bearing base for the precast box girder concrete pouring, and the wedge-shaped block slope adjustment grooves 100 set at both ends are used to accommodate the slope adjustment structure.

[0031] The adjustable support 2 consists of a connecting sleeve 21 and a bolt 22, which are threaded together to achieve height adjustment. The connecting sleeve 21 is vertically embedded in the bottom of the wedge-shaped block slope adjustment groove 100, and the axis of the connecting sleeve 21 is perpendicular to the bottom surface of the wedge-shaped block slope adjustment groove 100. The bolt 22 is screwed into the connecting sleeve 21, and its extension length is adjusted by rotating the bolt 22.

[0032] The dynamic compensation layer 3 is laid in the wedge-shaped block slope adjustment groove 100, and the filling depth of the dynamic compensation layer 3 varies with the bolt extension height.

[0033] An embedded bearing plate 4 is installed on the upper surface of the dynamic compensation layer 3, providing a rigid base surface for the pouring of wedge-shaped block concrete. The edge of the embedded bearing plate 4 is fixedly connected to the side wall of the wedge-shaped block slope adjustment groove 100 through an adhesive area. The first adhesive area is located on the upper end face of the inner side wall of the wedge-shaped block slope adjustment groove 100, and the second adhesive area is correspondingly located on the bottom surface of the edge of the embedded bearing plate 4. The embedded bearing plate 4 and the dynamic compensation layer 3 are tightly bonded together through the adhesive area to form a sealed interface to prevent concrete leakage. The adhesive area can be tightly bonded using double-sided adhesive.

[0034] Understandably, based on the design slope parameters of the precast box girder, the bolts 22 in the wedge-shaped block slope adjustment groove 100 are rotated one by one until the top of the bolt 22 reaches the predetermined height position. After the height adjustment of the bolt 22 is completed, the dynamic compensation layer 3 material is filled into the wedge-shaped block slope adjustment groove 100, and the embedded bearing plate 4 is installed on the upper surface of the dynamic compensation layer 3. The side wall of the wedge-shaped block slope adjustment groove 100 is provided with a first bonding area, and the edge of the embedded bearing plate 4 is provided with a second bonding area. The edge of the embedded bearing plate 4 and the side wall of the wedge-shaped block slope adjustment groove 100 are fixedly connected through the first bonding area and the second bonding area to prevent the grout from seeping into the interior of the wedge-shaped block slope adjustment groove 100 during concrete pouring. Wedge-shaped block concrete is poured on the embedded bearing plate 4 to form a precast box girder wedge-shaped block slope adjustment device, realizing the structural adaptation and construction accuracy control of the slope of multi-specification precast box girders by a single unit.

[0035] This embodiment improves the accuracy of slope adjustment and construction efficiency through the coordinated construction of adjustable support 2 and dynamic compensation layer 3. Bolt 22 rotates to adjust its height according to the designed slope parameters. Dynamic compensation layer 3 covers the exposed surface of bolt 22 and fills the gap area, forming a flat base surface within the wedge block slope adjustment groove 100 to support the embedded bearing plate 4. The cooperation between adjustable support 2 and dynamic compensation layer 3 allows for the prefabrication of box girders with different transverse and longitudinal slopes and different wedge block positions on the same prefabrication platform. This reduces the number of prefabrication platforms required, effectively reducing material consumption and enabling reuse. Furthermore, the device has a simple structure, is easy to operate, and effectively improves construction efficiency while ensuring project quality.

[0036] In some embodiments, see Figure 2 The wedge-shaped block slope adjustment groove 100 is a recessed structure set at both ends of the precast platform, and its depth dimension is strictly greater than the design height of the wedge-shaped block. This depth difference provides the necessary margin for slope adjustment, ensuring that the wedge-shaped block slope adjustment groove 100 can accommodate the maximum height change when the bolt is adjusted to the limit slope position, avoiding device failure due to insufficient space. The length and width dimensions of the wedge-shaped block slope adjustment groove 100 are completely consistent with the design length and width dimensions of the wedge-shaped block.

[0037] This embodiment solves the functional failure problem caused by insufficient slope adjustment space by setting the depth of the wedge slope adjustment groove 100 to be greater than the designed height of the wedge block, thus ensuring the feasibility of extreme slope conditions. The length and width dimensions of the wedge slope adjustment groove 100 are designed to be consistent with the designed length and width dimensions of the wedge block, achieving a precise match between the wedge block and the groove.

[0038] In some embodiments, see Figure 2A metal reinforcing frame 5 is provided on the inner wall of the wedge-shaped block slope adjustment groove 100. This metal reinforcing frame 5 serves as a reinforcing component of the adjustment groove structure, its function being to improve the lateral stiffness and overall stability of the wedge-shaped block slope adjustment groove 100. The metal reinforcing frame 5 maintains full contact with the inner wall of the wedge-shaped block slope adjustment groove 100.

[0039] It should be noted that the vertical height dimension of the metal reinforcement frame 5 is the same as the depth dimension of the wedge block slope adjustment groove 100, and its horizontal length dimension covers the entire circumference of the inner wall of the adjustment groove.

[0040] In this embodiment, a metal reinforcement frame 5 is installed on the inner wall of the wedge block slope adjustment groove 100. The metal reinforcement frame 5 improves the impact resistance and fatigue life of the wedge block slope adjustment groove 100, and ensures the structural stability of the precast box girder wedge block slope adjustment device during long-term repeated use.

[0041] In some embodiments, see Figure 2 and Figure 3 The precast platform 1 has a pre-embedded hole, the axis of which is perpendicular to the upper surface of the precast platform 1. A connecting sleeve 21 is fitted into the pre-embedded hole and is fixedly connected to the precast platform 1. The axial center line of the connecting sleeve 21 coincides with the axis of the pre-embedded hole. The connecting sleeve 21 has threads that mate with bolts 22. The screw-out height can be adjusted by rotating the bolts 22 to accommodate precast box girders with different slope requirements.

[0042] In some embodiments, see Figure 2 The dynamic compensation layer 3 is laid within the wedge-shaped block slope adjustment groove 100. The dynamic compensation layer 3 is made of a flowable granular material, such as dry natural sand or manufactured sand. After the bolts 22 are rotated to adjust their height according to the design slope parameters, the dynamic compensation layer 3 covers all exposed surfaces of the bolts 22 and fills the gaps between them. The top surface of the dynamic compensation layer 3 is smoothed, and then a pre-embedded bearing plate 4 is installed on its upper surface, ensuring that the plane formed by the dynamic compensation layer 3 and the pre-embedded bearing plate 4 perfectly matches the bottom surface of the wedge-shaped block, thus guaranteeing the integrity and reusability of the slope adjustment device.

[0043] It should be noted that after the pre-embedded bearing plate 4 is installed, the height is re-measured. If necessary, the surface of the dynamic compensation layer 3 is adjusted. Double-sided tape is used to fix the pre-embedded bearing plate 4 to the wedge-shaped block slope adjustment groove 100 to ensure that the surface of the precast box girder wedge-shaped block slope adjustment device meets the design slope after the concrete is poured.

[0044] In some embodiments, height markings are provided on the bolt 22, and the height markings are evenly distributed along the axial direction of the bolt 22. The sidewall of the wedge block slope adjustment groove 100 is provided with a scale calibration reference line, which is used in conjunction with the height markings on the bolt 22 to control the extension height of the bolt 22.

[0045] It should be noted that when rotating bolt 22, keep your line of sight perpendicular to the bolt's scale plane. Stop rotating when the height scale mark on bolt 22 is horizontally aligned with the scale calibration reference line on the side wall of the wedge block slope adjustment groove 100. At this point, bolt 22 has reached the designed height. Adjust the height position of all bolts 22 sequentially, and verify the consistency of the height of each bolt 22 using the scale calibration reference line.

[0046] By setting up a structure that uses height scale markings in conjunction with scale calibration baselines, manual measurement deviations are eliminated, thereby ensuring the height consistency of multi-bolt 22 adjustments.

[0047] In some embodiments, see Figure 2 The bottom of the connecting sleeve 21 is provided with a pressure diffusion base 211. The outer diameter of the pressure diffusion base 211 is larger than the outer diameter of the connecting sleeve 21.

[0048] It should be understood that the pressure diffusion base 211 increases the contact area between the connecting sleeve 21 and the concrete of the precast platform 1. The pressure diffusion base 211 disperses pressure by increasing the contact area.

[0049] By setting up a pressure diffusion base 211 with an outer diameter larger than that of the connecting sleeve 21, the increased contact area disperses the concentrated stress transmitted by the bolt 22, ensuring the reliability of the slope adjustment system during long-term use.

[0050] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A precast box girder wedge block slope adjustment device, characterized in that, include: Precast platform (1), with wedge-shaped block slope adjustment grooves (100) provided at both ends of the precast platform (1); Multiple sets of adjustable support components (2) are evenly arranged in the wedge-shaped block slope adjustment groove (100); The adjustable support (2) includes: A connecting sleeve (21) is vertically disposed at the bottom of the wedge block slope adjustment groove (100), and the inner wall of the connecting sleeve (21) is provided with threads; Bolt (22), the bolt (22) is connected to the connecting sleeve (21) by thread engagement, and the extension length of the bolt (22) is adjusted by rotation; Dynamic compensation layer (3), the dynamic compensation layer (3) is laid in the wedge block slope adjustment groove (100), and the filling depth of the dynamic compensation layer (3) varies with the extension height of the bolt (22); An embedded bearing plate (4) is provided on the upper surface of the dynamic compensation layer (3).

2. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The side wall of the wedge-shaped block slope adjustment groove (100) is provided with a first bonding area, and the edge of the pre-embedded bearing plate (4) is provided with a second bonding area. The edge of the pre-embedded bearing plate (4) and the side wall of the wedge-shaped block slope adjustment groove (100) are fixedly connected through the first bonding area and the second bonding area.

3. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The depth of the wedge slope adjustment groove (100) is greater than the design height of the wedge block, the length of the wedge slope adjustment groove (100) is the same as the design length of the wedge block, and the width of the wedge slope adjustment groove (100) is the same as the design width of the wedge block.

4. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The inner wall of the wedge-shaped block slope adjustment groove (100) is provided with a metal reinforcement frame (5).

5. The precast box girder wedge block slope adjustment device according to claim 4, characterized in that, The vertical height of the metal reinforcement frame (5) is the same as the depth of the wedge-shaped block slope adjustment groove (100), and the horizontal length of the metal reinforcement frame (5) covers the entire circumference of the inner wall of the wedge-shaped block slope adjustment groove (100).

6. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The prefabricated platform (1) is provided with a pre-embedded hole, and the connecting sleeve (21) is embedded in the pre-embedded hole and fixedly connected to the prefabricated platform (1).

7. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The dynamic compensation layer (3) covers the exposed surface of the bolts (22) and fills the gap area between the bolts (22).

8. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The bolt (22) is provided with height markings, which are evenly distributed along the axial direction of the bolt (22).

9. The precast box girder wedge block slope adjustment device according to claim 8, characterized in that, The side wall of the wedge-shaped block slope adjustment groove (100) is provided with a scale calibration reference line, which is used in conjunction with the height scale mark on the bolt (22) to control the extension height of the bolt (22).

10. The precast box girder wedge block slope adjustment device according to claim 1, characterized in that, The bottom of the connecting sleeve (21) is provided with a pressure diffusion base (211), and the outer diameter of the pressure diffusion base (211) is larger than the outer diameter of the connecting sleeve (21).

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