Guide beam device

Abstract

The guide beam device comprises a guide beam body, a supporting assembly, a first anchoring point, a second anchoring point and a steel strand, tensioning of the guide beam end is achieved through the steel strand, the first anchoring point and the second anchoring point of the guide beam device, connection is strong, and the guide beam end is not prone to deformation. The problems that in the prior art, the downwarping stress of the cantilever end of the guide beam is difficult to support and the supporting stability is poor due to the fact that a local reinforcing component is adopted are solved, the situation that the guide beam cannot pass through a temporary support and hinders the construction progress due to the fact that downwarping deformation is too large in the main beam pushing process is effectively prevented, and the safety of a construction site is greatly improved. In the using process, the supporting assemblies of different heights can be arranged under different working conditions to stretch and draw the guide beam to different degrees, adjustment can be conducted according to different requirements on the site, and the practicability of the device is greatly improved.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, and in particular to a guide beam device. Background Technology

[0002] A guide beam is a temporary auxiliary structure installed at the front end of the main beam during bridge construction using the incremental launching method. It ensures the longitudinal overturning stability of the beam during movement and reduces the beam's overhang, thereby lowering installation stress. The guide beam is shorter than the main beam, and its length is determined based on stability requirements during the incremental launching process and ensuring that the beam's installation stress does not exceed the design value. In rigid structure bridge projects, excessive deflection of the guide beam has prevented it from smoothly passing through the temporary supports in front, causing delays in construction progress.

[0003] According to the patent document CN215366758U, the connection structure between the top guide beam and the root of the steel box girder includes a box-type connection mechanism and an arc-shaped guide beam frame. It employs a method of local reinforcement of the main beam and guide beam. The first and second welded webs are butt-welded to the longitudinal diaphragm at the connection end of the steel box girder, and externally reinforced with welded reinforcing plates. The lower flange is pressed against the lower surface of the bottom plate of the steel box girder, and the upper rectangular flange is clamped to the upper surface of the steel box girder by tightening the screw rod with a turntable. This achieves a firm connection between the box-type connection mechanism and the end of the steel box girder, effectively controlling the downward deflection of the guide beam.

[0004] However, under construction conditions where the single span of the bridge is large and the guide beam is straight, the existing local reinforcement components are insufficient to bear the downward deflection of the guide beam, which will increase material costs and limit construction and installation efficiency. Utility Model Content

[0005] The present invention introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the present invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0007] In view of this, embodiments of this application propose a guide beam device, comprising:

[0008] Guide beam main body;

[0009] A support assembly, one end of which is connected to the guide beam;

[0010] The first anchor point and the second anchor point are disposed on the guide beam body, and the connection between the support component and the guide beam body is located between the first anchor point and the second anchor point.

[0011] The other end of the support assembly is connected to the first anchor point and the second anchor point via the steel strand.

[0012] In one feasible implementation, the support component includes:

[0013] The seat body is connected to the guide beam body;

[0014] I-beam, the I-beam being connected to the base body;

[0015] A drive wheel is disposed at one end of the I-beam, and the steel strand is connected to the drive wheel.

[0016] In one feasible implementation, the first anchoring point includes:

[0017] A pad, which is welded to the guide beam body, has a first central hole formed on it;

[0018] The first anchorage, wherein one end of the steel strand passes through the first central hole and is connected to the first anchorage.

[0019] In one feasible implementation, the second anchoring point includes:

[0020] A base, which is welded to the guide beam body;

[0021] A support plate, which is connected to the base by a pin, and a second central hole is formed on the support plate;

[0022] The second anchor is provided, wherein one end of the steel strand passes through the central hole of the first anchor and is connected to the second anchor.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] The guide beam device provided in this application includes a guide beam body, support components, a first anchor point, a second anchor point, and steel strands. This embodiment achieves tensioning of the guide beam end through the steel strands and the first and second anchor points, resulting in a strong connection. This avoids the problems of insufficient support for the downward deflection stress at the cantilever end of the guide beam and poor support stability in existing technologies that use local reinforcement components. It effectively prevents excessive downward deformation of the guide beam during the main beam jacking process, which could prevent the temporary supports from being used and hinder the construction progress, thus greatly improving the safety of the construction site. During use, support components of different heights can be set to tension the guide beam to different degrees under different working conditions, and adjustments can be made according to different site requirements, greatly improving the practicality of the device.

[0025] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model 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 utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 A schematic structural diagram of a guide beam device according to an embodiment of this application;

[0028] Figure 2 This is the first anchoring point of the guide beam device in one embodiment of this application;

[0029] Figure 3 A schematic structural diagram of the second anchoring point of a guide beam device according to an embodiment of this application;

[0030] Figure 4 A schematic structural diagram of another angle of the second anchor point of the guide beam device according to an embodiment of this application.

[0031] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0032] 1. Supporting component; 2. Steel strand; 3. First anchor point; 4. Second anchor point; 5. Guide beam body.

[0033] 12 bases, 13 I-beams, 14 drive wheels;

[0034] 31 First anchorage, 32 Pad;

[0035] 41 Second anchor, 42 Support plate, 43 Base, 44 Pin. Detailed Implementation

[0036] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0038] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0039] like Figures 1 to 4 As shown in the figure, this application embodiment proposes a guide beam device, including: a guide beam body 5; a support component 1, one end of which is connected to the guide beam; a first anchor point 3 and a second anchor point 4, which are disposed on the guide beam body 5, and the connection between the support component 1 and the guide beam body 5 is located between the first anchor point 3 and the second anchor point 4; and a steel strand 2, the other end of which is connected to the first anchor point 3 and the second anchor point 4 via the steel strand 2.

[0040] The guide beam device provided in this embodiment includes a guide beam body 5, a support component 1, a first anchor point 3, a second anchor point 4, and a steel strand 2. The guide beam device provided in this embodiment achieves tensioning of the guide beam end through the steel strand 2, the first anchor point 3, and the second anchor point 4, and the connection is strong. This avoids the problems of insufficient support for the downward deflection stress at the cantilever end of the guide beam and poor support stability in existing technologies that use local reinforcement components. It effectively prevents excessive downward deformation of the guide beam during the main beam jacking process, which could prevent it from being supported by temporary supports and hinder the construction process, and also greatly improves the safety of the construction site. During use, support components 1 of different heights can be set to tension the guide beam to different degrees under different working conditions, and adjustments can be made according to different site requirements, greatly improving the practicality of the device.

[0041] In one feasible implementation, the support assembly 1 includes: a base 4312 connected to the guide beam body 5; an I-beam connected to the base 4312; a drive wheel 14 disposed at one end of the I-beam, and the steel strand 2 connected to the drive wheel 14.

[0042] In this technical solution, the structural composition of the support component 1 is further provided. The support component 1 may include a base 4312, an I-beam, and a transmission wheel 14. Based on this, during use, the I-beam plays a supporting role and can be connected to the guide beam body 5 through the base 4312. The steel strand 2 can be connected to the transmission wheel 14, and the transmission wheel 14 can realize the transmission of force at the first anchor point 3 and the second anchor point 4, which facilitates the tensioning of the ends of the guide beam body 5.

[0043] In one feasible implementation, the first anchor point 3 includes: a pad 32, which is welded to the guide beam body 5, and a first central hole is formed on the pad 32; and a first anchor 31, one end of the steel strand 2 passing through the first central hole and connected to the first anchor 31.

[0044] In this technical solution, the structure of the first anchor point 3 is further provided. The first anchor point 3 may include a pad 32 welded to the guide beam body 5. Then, the steel strand 2 passes through the first central hole and is connected to the first anchor 31. The first anchor 31 and the pad 32 can tension the steel strand 2, so that the steel strand 2 can tension the first anchor point 3.

[0045] In some examples, to ensure mechanical strength, the pad 32 can be made of steel plate with a diameter of t=30mm.

[0046] In one feasible implementation, the second anchor point 4 includes: a base 43, which is welded to the guide beam body 5; a support plate 42, which is connected to the base 43 by a pin 44, and a second central hole is formed on the support plate 42; and a second anchor 41, one end of the steel strand 2 passing through the second central hole and connected to the second anchor 41.

[0047] This technical solution further provides the design of the second anchor point 4, which may include a base 43, a support plate 42, and a second anchor 41. The base 43 and the support plate 42 are connected by a cylindrical pin 44. A steel strand 2 passes through the center hole on the upper surface of the support plate 42, and the steel strand 2 is fixed to the upper surface of the support plate 42 by the second anchor 41. The base 43 and the support plate 42 are made of HN700*300 steel. The support plate 42 can be offset relative to the base plate according to the different force directions of the steel strand 2. This arrangement makes the force on the guide beam body 5 more balanced.

[0048] In some examples, the main load-bearing component of the steel strand tensioning system is selected with a specification of Φ18mm. Example

[0049] Please see Figure 1-4 In this embodiment of the utility model, a guide beam device includes a support assembly 1. The support body includes a base 4312, which is connected to an I-beam 13. A transmission wheel 14 is fixedly connected to the top surface of the I-beam 13. The transmission wheel 14 transmits prestress to a first anchoring point 3 and a second anchoring point 4 via steel strands 2. The first anchoring point 3 includes a pad 32, with a steel strand 2 inserted into the center hole of the pad 32. The steel strand 2 is fixed to the pad 32 by a first anchor 31. The second anchoring point 4 includes a base 43, which is connected to a support plate 42 via a cylindrical pin 44. A steel strand 2 passes through the center hole of the upper surface of the support plate 42, and the steel strand 2 is fixed to the upper surface of the support plate 42 by a second anchor 41.

[0050] Before the bridge jacking construction, the degree of downward deflection of the main body 5 of the guide beam is calculated. In order to ensure the safe passage of the guide beam through the temporary support, the pre-lifting height of the main body 5 of the guide beam is calculated, and then the magnitude of the prestress required for the steel strand 2 can be known.

[0051] In this embodiment, the guide beam deflects 1132mm during bridge jacking. To ensure the guide beam safely passes the temporary support in front, it needs to be pre-lifted by 300mm during installation. The first anchor point 3 is welded at a position of 23m on the main body 5 of the guide beam, and the second anchor point 4 is welded on the main beam 6. The deflection of the guide beam is reduced to less than 700mm through prestressing tension.

[0052] In this embodiment, the guide beam body 5 weighs 134 tons, is 37 meters long, and its center of gravity is located 15 meters above the guide beam body 5. The torque generated by the self-weight of the guide beam body 5 is:

[0053]

[0054] The tension T in steel strand 2 acts at a point 23 meters above the guide beam body 5, in an upward direction. The torque generated by the tension is:

[0055] M Tension = T ×23

[0056] In this embodiment, to ensure that the deflection at the front end of the guide beam body 5 is less than 700mm, the torque generated by the tension needs to partially offset the torque generated by the guide beam's own weight. Assuming that the deflection is proportional to the torque, the reduction in deflection is as follows:

[0057]

[0058] Therefore, the torque that the tension needs to counteract is:

[0059] M_offset = M_weight × 0.115 ≈ 2265270 N / m

[0060] Establish the torque balance equation:

[0061] T×23=2265270

[0062] The solution yields: T = 98490 N.

[0063] In this embodiment, the guide beam is tensioned using four sets of anchor points, with a vertical tension at each anchor point as follows:

[0064] T / 4 = 98490 N / 4 = 24622.5 N = 2.5 t

[0065] The oblique tension F of steel strand 2 is:

[0066] F = 2.5 / sin15 = 9.6t < 16t

[0067] In this embodiment, the diagonal tension of the steel strand 2 is less than 16t, which meets the construction requirements. On-site, the height of the I-beam 13 of the support component 1 and the offset angle of the support plate 42 of the second anchor point 4 are adjusted according to the arrangement of prestress. After the adjustment is completed, the tension of the steel strand 2 raises the main body of the guide beam 5 to facilitate the subsequent bridge jacking construction process.

[0068] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., 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 this utility model and simplifying the description, and do not indicate or imply that the device or unit 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 this utility model.

[0070] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which 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.

[0071] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A guide beam device, characterized in that, include: Guide beam main body; A support assembly, one end of which is connected to the guide beam; The first anchor point and the second anchor point are disposed on the guide beam body, and the connection between the support component and the guide beam body is located between the first anchor point and the second anchor point. The other end of the support assembly is connected to the first anchor point and the second anchor point via the steel strand.

2. The guide beam device according to claim 1, characterized in that, The support components include: The seat body is connected to the guide beam body; I-beam, the I-beam being connected to the base body; A drive wheel is disposed at one end of the I-beam, and the steel strand is connected to the drive wheel.

3. The guide beam device according to claim 1, characterized in that, The first anchor point includes: A pad, which is welded to the guide beam body, has a first central hole formed on it; The first anchorage, wherein one end of the steel strand passes through the first central hole and is connected to the first anchorage.

4. The guide beam device according to claim 1, characterized in that, The second anchoring point includes: A base, which is welded to the guide beam body; A support plate, which is connected to the base by a pin, and a second central hole is formed on the support plate; The second anchor is provided, wherein one end of the steel strand passes through the central hole of the first anchor and is connected to the second anchor.

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