Anti-overturning structure for continuous beam cantilever construction

Abstract

The utility model relates to the technical field of continuous beam cantilever construction, including anti -overturning structure, the anti -overturning structure includes: barrel seat: coaxial cover is located outside the pier, is fixed through the nut and the locating screw rod on the pad screw joint, cross seat: coaxial cover is located outside the pier, and its bottom is fixed through the nut and the fixed screw rod of barrel seat top screw joint, column cylinder: fixed connection in cross seat bottom, connecting rod body: one end fixed connection with zero block bottom embedded spare, the other end extends to in the column cylinder, screw cylinder: screw joint in the column cylinder bottom, the utility model discloses rational in structure, realizes four -way spacing through anti -overturning structure, breaks symmetry construction limit, allows asymmetric operation, avoids one -sided delay influence whole, improves construction efficiency greatly, can provide stable support in construction and operation stage, solves the problem that the anti -overturning reserve is insufficient caused by traditional technology dependence structure symmetry, and the reliability and operation convenience of detail design improvement.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous beam cantilever construction, and in particular to an anti-overturning structure for continuous beam cantilever construction. Background Technology

[0002] In the construction of continuous beam cantilever casting, the zero block, as the core starting structure connecting the pier and the cantilever beam segment, directly determines the safety of subsequent construction. Preventing the zero block from overturning is the primary control objective of the entire construction process. The zero block is located at the top of the pier, serving as the basic carrier for the installation of the hanging basket and a key node for balancing the loads on both sides of the cantilever. Once it overturns, it will lead to the failure of the entire beam construction and cause major engineering risks.

[0003] Currently, the industry generally adopts the "temporary consolidation + symmetrical pouring" process to control the overturning of the zero block. Temporary consolidation usually involves setting up temporary concrete supports or prestressed anchoring devices on the top of the pier to rigidly connect the zero block to the pier, forming a temporary fixed system to resist the unbalanced moment in the early stage of construction. Symmetrical pouring requires that the cantilever beam segments on both sides be strictly synchronized during the formwork construction, including the volume of concrete pouring, the progress of rebar binding, and the speed of formwork movement, all of which must be kept consistent. By balancing the loads on both sides, the zero block is prevented from overturning due to stress imbalance.

[0004] However, existing processes have significant limitations in practical applications:

[0005] On the one hand, the "slow and symmetrical" requirement of hanging basket construction severely restricts construction efficiency. In order to ensure the balance of loads on both sides, the process of moving the hanging basket forward and pouring beam segments must be carried out in strict accordance with the symmetrical rhythm. Any delay in construction on one side (such as equipment failure or insufficient material supply) will lead to the overall stagnation and significantly extend the construction period. For large-span continuous beams (span exceeding 100m), this efficiency loss is particularly significant and it is difficult to meet the rapid construction requirements of modern bridge engineering.

[0006] On the other hand, the anti-overturning reliability after the system conversion is insufficient. When the beam is closed and converted into a permanent load-bearing system, the temporary consolidation device needs to be removed. At this time, the bridge's anti-overturning capacity depends entirely on the stiffness of the symmetrical structure itself. However, in long-term operation, affected by factors such as vehicle eccentric loading, temperature stress, and foundation settlement, the symmetrical structure is prone to the accumulation of small deformations, which leads to a reduction in anti-overturning reserves. It is difficult to resist sudden lateral loads (such as strong winds and earthquakes) by relying solely on structural symmetry, and there is a potential risk of overturning. Utility Model Content

[0007] This utility model aims to at least partially solve one of the technical problems in the related art.

[0008] Therefore, the purpose of this utility model is to propose an anti-overturning structure for continuous beam cantilever construction. This utility model has a reasonable structure and achieves four-way restraint through the anti-overturning structure, breaking the limitations of symmetrical construction, allowing asymmetrical operation, avoiding the impact of unilateral delay on the whole, greatly improving construction efficiency, and providing stable support during both construction and operation stages, thus solving the problem of insufficient anti-overturning reserve caused by the reliance on structural symmetry in traditional processes.

[0009] To achieve the above objectives, this utility model proposes an anti-overturning structure for continuous beam cantilever construction, comprising an anti-overturning structure including:

[0010] Cylindrical base: It is coaxially sleeved on the outside of the pier and fixed by screwing a nut to the positioning screw on the pad;

[0011] Cross seat: It is coaxially sleeved on the outside of the pier, and its bottom is screwed to the fixing screw at the top of the cylindrical seat by a nut;

[0012] Column: Fixedly connected to the bottom of the cross seat, with its top flush with the top of the cross seat;

[0013] Connecting rod: One end is fixedly connected to the embedded part at the bottom of the zero block, and the other end extends into the column tube;

[0014] Screw: Threaded to the bottom of the column, with one end extending into the inside of the column and detachably connected to the end of the connecting rod.

[0015] In addition, the continuous beam cantilever construction anti-overturning structure proposed in the above application may also have the following additional technical features:

[0016] Specifically, the cylindrical tube contains a sphere, and the surface of the sphere has a connecting hole for the connecting rod to pass through;

[0017] The bottom of the column is threadedly connected to a lifting seat, and the top of the lifting seat is integrally formed with an arc-shaped seat, which is in contact with the bottom of the sphere.

[0018] One end of the screw cylinder extends through the connection hole and is detachably connected to the connecting rod body;

[0019] The inner wall of the connecting hole is provided with an annular groove along the circumference, and a graded elastic pad layer is provided inside the annular groove.

[0020] Specifically, a flange is provided at one end of the connecting rod near the zero block. The flange is connected to the embedded part at the bottom of the zero block by high-strength bolts, and a rubber gasket is provided between the flange and the embedded part.

[0021] The connecting rod body has an external thread section at the end away from the zero block, and the screw barrel has an internal thread that matches the external thread section. The length of the external thread section is 1.2-1.5 times the length of the screw barrel.

[0022] Specifically, each of the screw barrel and the cylindrical barrel is provided with an operating handle at the end away from the connecting rod. The operating handle is perpendicular to the screw barrel and the cylindrical barrel, respectively. The surface of the operating handle is provided with anti-slip texture. The outer wall of the cylindrical barrel is provided with an axial scale line with an accuracy of 1mm.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This invention breaks the limitations of traditional "slow and symmetrical construction" by using a four-way limiting support for an anti-overturning structure, allowing asymmetrical operations and avoiding overall stagnation caused by delays on one side. It is especially suitable for large-span continuous beams (span exceeding 100m) and significantly shortens the construction cycle. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 This is a structural schematic diagram of a continuous beam cantilever construction anti-overturning structure according to the present invention;

[0027] Figure 2 This is a schematic diagram of a partial anti-overturning structure in a continuous beam cantilever construction anti-overturning structure according to the present invention;

[0028] Figure 3 This is a schematic diagram of the column tube structure in a continuous beam cantilever construction anti-overturning structure according to the present invention;

[0029] Figure 4 This is a schematic diagram of the connecting hole structure in a continuous beam cantilever construction anti-overturning structure according to the present invention.

[0030] As shown in the figure:

[0031] 1. Anti-overturning structure; 2. Temporary consolidation;

[0032] 100. Pier; 200. Pad; 300. Positioning screw; 400. Zero block; 500. Fixing screw; 600. Operating handle;

[0033] 11. Cylinder base; 111. Reinforcing rib; 12. Cross base; 13. Column cylinder; 14. Connecting rod body; 15. Threaded cylinder;

[0034] 131. Sphere; 1311. Connecting hole; 132. Lifting seat; 133. Arc-shaped seat;

[0035] 1312. Elastic cushioning layer;

[0036] 141. Flange; 142. External thread section. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0038] The following description, in conjunction with the accompanying drawings, describes an embodiment of the present invention of a continuous beam cantilever construction anti-overturning structure.

[0039] like Figures 1-4 As shown in the figure, an anti-overturning structure for continuous beam cantilever construction according to an embodiment of the present invention includes an anti-overturning structure 1, which includes:

[0040] Cylinder seat 11: Coaxially sleeved on the outside of the pier 100, and fixed by screwing a nut to the positioning screw 300 on the pad 200;

[0041] Cross seat 12: It is coaxially sleeved on the outside of the pier 100, and its bottom is screwed to the fixing screw 500 at the top of the cylindrical seat 11 by a nut;

[0042] Column 13: Fixedly connected to the bottom of cross seat 12, with its top flush with the top of cross seat 12;

[0043] Connecting rod 14: One end is fixedly connected to the embedded part at the bottom of the zero block 400, and the other end extends into the column tube 13;

[0044] Screw 15: Threaded connection to the bottom of the column 13, one end of which extends into the inside of the column 13 and is detachably connected to the end of the connecting rod 14.

[0045] Specifically, its working principle is as follows:

[0046] 1. Installation and fixing of anti-overturning structure 1: First, put the cylinder seat 11 on the outside of the pier 100, and then screw the nut to the positioning screw 300 on the pad 200. After fixing, put the cross seat 12 on the outside of the pier 100, and then screw the nut to the fixing screw 500 on the top of the cylinder seat 11 to form a stable bottom support structure, providing a rigid base for the subsequent anti-overturning components;

[0047] 2. Construction of Temporary Consolidation 2 and Block 400: A temporary concrete support or prestressed anchorage device is set on the top of pier 100. Block 400 is symmetrically poured to form a rigid system of "pier 100-block 400". Initially, the unbalanced moment is resisted by temporary consolidation 2.

[0048] 3. Connection between anti-overturning structure 1 and zero block 400: One end of the connecting rod 14 is fixed to the bottom embedded part of zero block 400 through flange 141, and the other end extends into the column cylinder 13. It is fastened by threaded connection between the threaded end of the connecting rod 14 and the screw cylinder 15.

[0049] 4. State adjustment and system conversion: Before closure, separate the anti-overturning structure 1 and block 400 to avoid construction stress interference; after closure, remove the temporary consolidation 2, re-measure the position, and reconnect the anti-overturning structure 1 and block 400.

[0050] It should be noted that the angle of the connecting rod 14 after closure may deviate from the angle before closure, causing the screw cylinder 15 to be unable to connect precisely with the connecting rod 14. To address this, the device includes a ball 131 inside the column cylinder 13. The ball 131 can rotate freely and has a connecting hole 1311 on its surface to facilitate the insertion of the connecting rod 14. In use, the angle of the ball 131 is adjusted so that the end of the connecting rod 14 is inserted into the connecting hole 1311. Then, the lifting seat 132 is rotated until the arc seat 133 abuts against the bottom of the ball 131, preventing it from moving. This limits the angle and position of the connecting rod 14. Through the fine-tuning function of components such as the ball 131 and screw cylinder 15, the anti-overturning structure 1 continuously provides four-way limiting, balances the force on the zero block 400, and prevents overturning.

[0051] This structure achieves a dual improvement in construction efficiency and stability, covering the anti-overturning requirements throughout the entire lifecycle from construction to operation.

[0052] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the cylindrical tube 13 contains a sphere 131, and the surface of the sphere 131 is provided with a connecting hole 1311 for the connecting rod 14 to pass through.

[0053] The bottom of the column 13 is threadedly connected to a lifting seat 132, and the top of the lifting seat 132 is integrally formed with an arc-shaped seat 133, which abuts against the bottom of the ball 131.

[0054] One end of the screw cylinder 15 extends into the connection hole 1311 and is detachably connected to the connecting rod 14.

[0055] The inner wall of the connecting hole 1311 is provided with an annular groove along the circumference, and an elastic pad 1312 is provided inside the annular groove.

[0056] Specifically, the combined design of the column 13, sphere 131, lifting seat 132, arc-shaped seat 133, and screw cylinder 15 is the core structure for achieving the angle adaptation and rigid fixation of the anti-overturning structure 1. The sphere 131 can rotate freely within the column 13, and its surface connection hole 1311 allows the connecting rod 14 to pass through. This allows it to adapt to angle changes in the connecting rod 14 caused by construction deviations through rotation, solving the connection problem caused by angle offset of the connecting rod 14 after closure. The lifting seat 132 is threaded to the bottom of the column 13 and can rise and fall axially during rotation. The top arc-shaped seat 133 fits against the bottom of the sphere 131, and after rising to the predetermined position, it rigidly holds the sphere 131. 31. Restricting its rotation, the ball 131 is fixed at a position that matches the angle of the connecting rod 14 to achieve angle locking. The screw cylinder 15 passes through the connecting hole 1311 and is detachably connected to the connecting rod 14. It provides axial fastening force through the threaded connection to rigidly fix the connecting rod 14 and the ball 131. It can also be disassembled to separate the anti-overturning structure 1 from the zero block 400, meeting the operational requirements of the system conversion stage. Through the synergistic effect of "adaptive angle of ball 131 + rigid locking of lifting seat 132 + axial fixing of screw cylinder", the adaptability of construction deviation and the stability of connection are taken into account, improving the reliability and operational flexibility of the anti-overturning structure 1.

[0057] The elastic pad 1312 tightly wraps around the connecting rod 14 to form an axially fixed connection structure.

[0058] In one embodiment of this utility model, such as Figure 3 As shown, a flange 141 is provided at one end of the connecting rod 14 near the zero block 400. The flange 141 is connected to the embedded part at the bottom of the zero block 400 by high-strength bolts. A rubber gasket is provided between the flange 141 and the embedded part.

[0059] The end of the connecting rod 14 away from the zero block 400 is provided with an external thread section 142, and the inside of the screw barrel 15 is provided with an internal thread that matches the external thread section 142. The length of the external thread section 142 is 1.2-1.5 times the length of the screw barrel 15.

[0060] It should be noted that the connection between the flange 141 and the connecting rod 14 described in this embodiment is provided with an annular reinforcing section (not shown in the figure). The outer diameter of the reinforcing section is 10-15 mm smaller than that of the flange 141, and the wall thickness is 5-8 mm thicker than that of the connecting rod 14. The reinforcing section, the flange 141, and the connecting rod 14 are formed by an integrated forging process.

[0061] Specifically, the connection structure design of the connecting rod 14, the zero block 400, and the screw cylinder 15 focuses on connection strength, compatibility, and durability. The end closest to the zero block 400 is connected to the embedded part via a flange 141. High-strength bolts ensure connection rigidity, and rubber gaskets buffer stress generated by construction vibrations, preventing wear caused by hard contact. Simultaneously, the height difference can be adjusted by changing the thickness of the rubber gaskets. A ring-shaped reinforcing section is provided at the connection between the flange 141 and the connecting rod 14. This stress concentration area is strengthened by increasing the wall thickness (5-8mm thicker than the rod body) and using an integrated forging process. To enhance the structural strength of the domain and prevent the risk of breakage under long-term stress, an external thread section 142 is provided at the end furthest from the zero block 400, which matches the internal thread of the screw barrel 15. The thread section design, which is 1.2-1.5 times the length of the screw barrel 15, ensures that the connection length meets the fastening requirements while reserving sufficient adjustment margin to accommodate minor deviations in the insertion depth of the connecting rod 14 during construction. This ensures that the screw barrel 15 can stably lock the connecting rod 14. Through the combination of "rigid connection + buffer compensation + strength reinforcement", a reliable connection between the connecting rod 14, the zero block 400, and the screw barrel 15 is achieved, taking into account both construction adaptability and long-term stress stability.

[0062] In one embodiment of this utility model, such as Figure 3 As shown, both the screw barrel 15 and the column barrel 13 are provided with an operating handle 600 at the end away from the connecting rod body 14. The operating handle 600 is perpendicular to the screw barrel 15 and the column barrel 13 respectively. The surface of the operating handle 600 is provided with anti-slip texture. The outer wall of the column barrel 13 is provided with an axial scale line with an accuracy of 1mm.

[0063] Specifically, an operating handle 600 is provided at the end of the screw cylinder 15 and the column cylinder 13 away from the connecting rod body 14. The handle is perpendicular to both and has anti-slip texture on its surface. The vertically positioned handle provides a force-saving lever for rotating the screw cylinder 15 or the column cylinder 13, making it easy for construction personnel to quickly complete the connection, tightening or separation operation. It can improve efficiency, especially when working at height. The anti-slip texture increases the friction of the hand and avoids the risk of tools falling off or connection failure due to slippage during operation. The 1mm precision axial scale line on the outer wall of the column cylinder 13 can intuitively display the adjustment height of the screw cylinder 15 or the lifting seat 132, ensuring the consistency of the adjustment of the anti-overturning structure 1 in symmetrical positions and avoiding the force imbalance caused by operation error. At the same time, the scale data can also indicate the overturning situation corresponding to the zero block 400, resulting in good performance.

[0064] In one embodiment of this utility model, such as Figure 2 As shown, reinforcing ribs 111 are evenly distributed on the outer surface of the cylinder base 11.

[0065] The uniform reinforcing ribs on the outer surface of the cylinder base 11 can improve its overall rigidity, resist radial deformation caused by load transfer during construction, and ensure the stability of the connection with the pier 100.

[0066] In summary, the anti-overturning structure for continuous beam cantilever construction according to this utility model embodiment is structurally reasonable. It achieves four-way limiting through the anti-overturning structure 1, breaks the limitations of symmetrical construction, allows asymmetrical operation, avoids the impact of unilateral delay on the overall structure, significantly improves construction efficiency, and provides stable support during both construction and operation phases. It solves the problem of insufficient anti-overturning reserve caused by the reliance on structural symmetry in traditional processes, and the detailed design improves reliability and ease of operation.

[0067] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuous beam cantilever construction anti-overturning structure, characterized in that, Including an anti-overturning structure (1), said anti-overturning structure (1) comprising: Cylinder seat (11): Coaxially sleeved on the outside of the pier (100), and fixed by screwing a nut to the positioning screw (300) on the pad (200); Cross seat (12): It is coaxially sleeved on the outside of the pier (100), and its bottom is screwed to the fixing screw (500) at the top of the cylindrical seat (11) by a nut; Column (13): fixedly connected to the bottom of the cross seat (12), and its top is flush with the top of the cross seat (12); Connecting rod (14): One end is fixedly connected to the embedded part at the bottom of the zero block (400), and the other end extends into the column tube (13); Screw (15): Threaded to the bottom of the column (13), with one end extending into the inside of the column (13) and detachably connected to the end of the connecting rod (14).

2. The anti-overturning structure for continuous beam cantilever construction according to claim 1, characterized in that, The cylindrical tube (13) contains a sphere (131), and the surface of the sphere (131) has a connecting hole (1311) for the connecting rod (14) to pass through. The bottom of the column (13) is threadedly connected to a lifting seat (132), and the top of the lifting seat (132) is integrally formed with an arc-shaped seat (133), which is in contact with the bottom of the sphere (131). One end of the screw cylinder (15) extends into the connecting hole (1311) and is detachably connected to the connecting rod body (14); The inner wall of the connecting hole (1311) is provided with an annular groove along the circumference, and an elastic pad (1312) is provided inside the annular groove.

3. The anti-overturning structure for continuous beam cantilever construction according to claim 1, characterized in that, A flange (141) is provided at one end of the connecting rod body (14) near the zero block (400). The flange (141) is connected to the embedded part at the bottom of the zero block (400) by high-strength bolts. A rubber gasket is provided between the flange (141) and the embedded part. The connecting rod body (14) is provided with an external thread section (142) at one end away from the zero block (400), and the screw barrel (15) is provided with an internal thread that matches the external thread section (142). The length of the external thread section (142) is 1.2-1.5 times the length of the screw barrel (15).

4. The anti-overturning structure for continuous beam cantilever construction according to claim 1, characterized in that, Both the screw barrel (15) and the cylindrical tube (13) are provided with an operating handle (600) at the end away from the connecting rod (14). The operating handle (600) is perpendicular to the screw barrel (15) and the cylindrical tube (13) respectively. The surface of the operating handle (600) is provided with anti-slip texture. The outer wall of the cylindrical tube (13) is provided with an axial scale line with an accuracy of 1mm.

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