A cantilever casting device for long-span bridges
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-27
- Publication Date
- 2026-08-11
AI Technical Summary
[0004]为了解决上述技术问题，本实用新型提供一种大跨度桥梁悬臂浇筑装置，以解决现有的大跨度桥梁悬臂浇筑装置依然存在着无法快速形成浇筑模具，无法快速脱模的问题
1.本实用新型浇筑模具的设置，通过由上一模具板、上二模具板、侧一模具板、侧二模具板、底一模具板和底二模具板拼合形成的密闭型腔，为新浇筑混凝土提供成型空间，并依靠其刚性支撑混凝土荷载；其一端卡合于已完成桥梁端面，确保了新老结构的精确对接；最终通过各模块在定位推杆驱动下向上、向两侧、向下多向分离，实现高效无损脱模，同时其顶部的浇筑口为混凝土灌入提供了通道。
Smart Images
Figure CN224620456U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge cantilever casting technology, and in particular to a cantilever casting device for long-span bridges. Background Technology
[0002] In the construction of large bridges, especially long-span prestressed concrete bridges such as continuous rigid frame bridges, cable-stayed bridges, and arch bridges, the cantilever casting method is an extremely important and widely used advanced construction method. The core of this method is to extend and cast concrete beam segments symmetrically or asynchronously to both sides of the completed piers or bridge sections until closure, ultimately forming the complete main structure of the bridge. However, existing cantilever casting devices for long-span bridges still suffer from the problem of not being able to quickly form casting molds and thus not being able to quickly demold.
[0003] Therefore, it is essential to invent a cantilever casting device for long-span bridges. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model provides a cantilever casting device for long-span bridges, solving the issues that existing cantilever casting devices for long-span bridges still suffer from the inability to quickly form casting molds and the inability to quickly demold. A cantilever casting device for long-span bridges includes a completed bridge, a cantilever support frame, a reinforcing frame, a cantilever connecting lock, a positioning push rod, a casting mold, and a shaping sealing plate. Specifically: at least two sets of cantilever support frames are used, and a reinforcing frame is fixedly installed between the cantilever support frames; the cantilever connecting lock is fixedly installed on the top of the cantilever support frame and connects to the cantilever structure fixed to the surface of the completed bridge; the positioning push rod is fixedly installed on the inner wall of the cantilever support frame, and the casting mold is fixedly installed at one end of the positioning push rod, with one end of the casting mold engaging with one end of the completed bridge; a shaping sealing plate is fixedly installed at the other end of the casting mold.
[0005] The casting mold includes an upper mold plate, an upper second mold plate, a pouring gate, a side mold plate, a side second mold plate, a bottom mold plate, and a bottom second mold plate. The upper mold plate and the upper second mold plate are spliced together, and the pouring gate is located in the middle of the upper mold plate and the upper second mold plate. The side mold plate and the side second mold plate are respectively spliced on both sides below the upper mold plate and the upper second mold plate. The bottom mold plate and the bottom second mold plate are respectively spliced at the bottom of the side mold plate and the side second mold plate.
[0006] The side mold plate includes a side wall plate, a connecting plate, and an extension support column. The connecting plate is fixedly installed at both the upper and lower ends of the side wall plate. The side wall plate is spliced together with the upper mold plate and the bottom mold plate through the connecting plate. The extension support column is fixedly installed on the outer wall of the side wall plate and connected to the positioning push rod.
[0007] The casting mold uses a set of steel metal plates with a shape completely identical to the completed bridge. The casting mold is assembled to form the shape of the bridge. The upper mold plate and the upper second mold plate move upward with the support of positioning push rods. The side mold plate and the side second mold plate move to the sides respectively with the support of positioning push rods. The bottom mold plate and the bottom second mold plate move downward with the support of positioning push rods. After they separate, the cast bridge is demolded. One end of the casting mold is sealed with the completed bridge, and the other end of the casting mold is sealed with a shaping sealing plate.
[0008] The side wall plate inside the mold plate is inclined in the shape of a bridge, and the inclined surface of the side wall plate cannot be moved horizontally directly by the positioning push rod. The extended support column is a pair of steel metal columns; the extended support column makes the side wall plate form a vertical plane.
[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. The casting mold of this utility model provides a forming space for newly poured concrete through a closed cavity formed by the assembly of an upper mold plate, an upper second mold plate, a side mold plate, a side second mold plate, a bottom mold plate, and a bottom second mold plate, and relies on its rigidity to support the concrete load; one end of it is engaged with the completed bridge end face to ensure precise connection between the old and new structures; finally, through the multi-directional separation of each module upward, to both sides, and downward driven by the positioning push rod, efficient and non-destructive demolding is achieved, while the pouring port at the top provides a channel for concrete pouring.
[0010] 2. The side mold plate of this utility model is symmetrically arranged with the side mold plate to form the forming surfaces on both sides of the bridge segment. The specific inclined shape of its side wall plate is used to accurately shape the side profile of the bridge. The upper and lower connecting plates are respectively spliced with the upper mold plate or the upper two mold plates and the bottom mold plate, which play the role of connecting and sealing the cavity. The extended support column of its outer wall provides a vertical force application plane for the positioning push rod, effectively transferring the horizontal thrust to the inclined template, thereby realizing precise lateral movement and demolding. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] Figure 2 This is a schematic diagram of the utility model when it is not installed.
[0013] Figure 3 This is a structural schematic diagram of the casting mold of this utility model.
[0014] Figure 4 This is a schematic diagram of the structure of a side mold plate of this utility model. In the picture: The following components have been completed: Bridge 1, Cantilever Support Frame 2, Reinforced Frame 3, Cantilever Connecting Lock 4, Positioning Push Rod 5, Casting Mold 6, Upper Mold Plate 61, Upper Second Mold Plate 62, Casting Port 63, Side Mold Plate 64, Side Wall Plate 641, Connecting Plate 642, Extension Support Column 643, Side Second Mold Plate 65, Bottom Mold Plate 66, Bottom Second Mold Plate 67, and Shaping Sealing Plate 7. Detailed Implementation
[0015] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0016] As attached Figure 1 To be continued Figure 3 As shown.
[0017] This utility model provides a cantilever casting device for long-span bridges, comprising a completed bridge 1, a cantilever support frame 2, a reinforcing frame 3, a cantilever connecting lock 4, a positioning push rod 5, a casting mold 6, and a shaping sealing plate 7. Specifically: at least two sets of cantilever support frames 2 are used, and the reinforcing frame 3 is fixedly installed between the cantilever support frames 2; the cantilever connecting lock 4 is fixedly installed on the top of the cantilever support frame 2 and connects to the cantilever structure fixed to the surface of the completed bridge 1; the positioning push rod 5 is fixedly installed on the inner wall of the cantilever support frame 2, and the casting mold 6 is fixedly installed on one end of the positioning push rod 5, with one end of the casting mold 6 engaging with one end of the completed bridge 1; the other end of the casting mold 6 is fixedly installed with the shaping sealing plate 7.
[0018] The casting mold 6 includes an upper mold plate 61, an upper second mold plate 62, a pouring port 63, a side mold plate 64, a side mold plate 65, a bottom mold plate 66, and a bottom second mold plate 67. The upper mold plate 61 and the upper second mold plate 62 are spliced together, and the pouring port 63 is located in the middle of the upper mold plate 61 and the upper second mold plate 62. The side mold plate 64 and the side mold plate 65 are spliced on both sides below the upper mold plate 61 and the upper second mold plate 62, respectively. The bottom mold plate 66 and the bottom second mold plate 67 are spliced on the bottom of the side mold plate 64 and the side mold plate 65, respectively.
[0019] The side mold plate 64 includes a side wall plate 641, a connecting plate 642, and an extension support column 643. The connecting plate 642 is fixedly installed at the upper and lower ends of the side wall plate 641, and the side wall plate 641 is spliced together with the upper mold plate 61 and the bottom mold plate 66 through the connecting plate 642. The extension support column 643 is fixedly installed on the outer wall of the side wall plate 641 and connected to the positioning push rod 5.
[0020] The casting mold 6 uses a set of steel metal plates with a shape completely identical to the completed bridge 1. The casting mold 6 is assembled to form the shape of the bridge. The upper mold plate 61 and the upper second mold plate 62 move upward with the support of the positioning push rod 5. The side mold plate 64 and the side second mold plate 65 move to the sides respectively with the support of the positioning push rod 5. The bottom mold plate 66 and the bottom second mold plate 67 move downward with the support of the positioning push rod 5. After they separate, the demolding of the cast bridge is completed. One end of the casting mold 6 is sealed by the completed bridge 1, and the other end of the casting mold 6 is sealed by the shaping sealing plate 7.
[0021] The side wall plate 641 inside the mold plate 64 is inclined according to the shape of a bridge, and the inclined surface of the side wall plate 641 cannot be moved horizontally directly by the positioning push rod 5. The extended support column 643 is a pair of steel metal columns; the extended support column 643 makes the side wall plate 641 form a vertical plane.
[0022] The core working principle of this long-span bridge cantilever casting device lies in the synergy between stable support and dynamic casting. Its workflow begins with positioning and installation: First, the entire device is anchored to the completed bridge 1 via cantilever connection locks 4, with the cantilever support frame 2 and reinforcing frame 3 forming the rigid support body. Then, the molding stage begins: multiple sets of positioning push rods 5 drive each module of the casting mold 6—pushing the upper mold plate 61 and upper second mold plate 62 downwards, the side mold plate 64 and side second mold plate 65 inwards, and the bottom mold plate 66 and bottom second mold plate 67 upwards, tightly splicing them into a sealed cavity consistent with the design cross-section. One end is engaged with the existing bridge structure, and the other end is sealed by the shaping sealing plate 7.
[0023] Then comes the pouring and molding process: Concrete is poured into the cavity through pouring port 63, the support system bears the entire load, and the mold ensures molding accuracy. After the concrete hardens, the demolding process begins: the positioning push rod 5 moves in the opposite direction, driving the top plate, side plates, bottom plate, etc., to separate in multiple directions, allowing the formwork to detach from the concrete structure without damage. Finally, the cantilever connection lock 4 is released, allowing the device to be moved and preparing for the next segment of the cyclic construction.
[0024] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. A cantilever casting device for long-span bridges, characterized in that: The system includes a completed bridge (1), a cantilever support frame (2), a reinforcing frame (3), a cantilever connection lock (4), a positioning push rod (5), a casting mold (6), and a shaping sealing plate (7). Among these, at least two sets of cantilever support frames (2) are used, and a reinforcing frame (3) is fixedly installed between the cantilever support frames (2). The cantilever connection lock (4) is fixedly installed on the top of the cantilever support frame (2) and connected to the cantilever structure fixed on the surface of the completed bridge (1). The positioning push rod (5) is fixedly installed on the inner wall of the cantilever support frame (2), and the casting mold (6) is fixedly installed on one end of the positioning push rod (5). One end of the casting mold (6) is engaged with one end of the completed bridge (1). The other end of the casting mold (6) is fixedly installed with a shaping sealing plate (7).
2. The cantilever casting device for long-span bridges as described in claim 1, characterized in that: The casting mold (6) includes an upper mold plate (61), an upper second mold plate (62), a pouring port (63), a side mold plate (64), a side second mold plate (65), a bottom mold plate (66), and a bottom second mold plate (67). The upper mold plate (61) and the upper second mold plate (62) are spliced together, and the pouring port (63) is located in the middle of the upper mold plate (61) and the upper second mold plate (62). The side mold plate (64) and the side second mold plate (65) are spliced on both sides below the upper mold plate (61) and the upper second mold plate (62), respectively. The bottom mold plate (66) and the bottom second mold plate (67) are spliced on the bottom of the side mold plate (64) and the side second mold plate (65), respectively.
3. The cantilever casting device for long-span bridges as described in claim 2, characterized in that: The side mold plate (64) includes a side wall plate (641), a connecting plate (642) and an extension support column (643). The upper and lower ends of the side wall plate (641) are respectively fixedly installed with the connecting plate (642). The side wall plate (641) is spliced together with the upper mold plate (61) and the bottom mold plate (66) through the connecting plate (642). The extension support column (643) is fixedly installed on the outer wall of the side wall plate (641) and connected to the positioning push rod (5).
4. The cantilever casting device for long-span bridges as described in claim 2, characterized in that: The casting mold (6) is made of a set of steel metal plates with the same shape as the completed bridge (1). The casting mold (6) is assembled into the shape of the bridge. The upper mold plate (61) and the upper second mold plate (62) move upward with the support of the positioning push rod (5). The side mold plate (64) and the side second mold plate (65) move to the sides respectively with the support of the positioning push rod (5). The bottom mold plate (66) and the bottom second mold plate (67) move downward with the support of the positioning push rod (5). After they separate, the demolding of the cast bridge is completed. One end of the casting mold (6) is sealed by the completed bridge (1), and the other end of the casting mold (6) is sealed by the shaping sealing plate (7).
5. The cantilever casting device for long-span bridges as described in claim 3, characterized in that: The side wall plate (641) inside the side mold plate (64) is inclined according to the shape of a bridge, and the inclined surface of the side wall plate (641) cannot be moved horizontally directly by the positioning push rod (5). The extension support column (643) is a pair of steel metal columns; the extension support column (643) makes the side wall plate (641) form a vertical plane.