Heavy-load trestle

Abstract

The utility model discloses a heavy load trestle which comprises a trestle body, the trestle body comprises two rows of main beams arranged in parallel, longitudinal guide rails are arranged on the upper portions and the lower portions of the main beams, a first telescopic supporting leg is arranged at the front end of the trestle body, and a rear supporting piece is arranged at the rear end of the trestle body. At least one movable supporting mechanism is arranged between the first telescopic supporting leg and the rear supporting piece, and the movable supporting mechanism is provided with a second telescopic supporting leg, a moving part matched with the longitudinal guide rail and a first cross beam located below the main beam. The first telescopic supporting leg and the second telescopic supporting leg are both in an extending state to support the trestle main body, and the two ends of the first cross beam are provided with auxiliary supporting pieces used for supporting the main beam and supporting driving pieces used for driving the auxiliary supporting pieces to move in a reciprocating mode. The heavy load trestle can effectively improve bearing capacity and vehicle passing safety, and is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction equipment, in particular to a heavy-load trestle. Background Art

[0002] With the rapid development of infrastructure construction, especially the construction of tunnel projects, the improvement of construction efficiency has become the focus of the industry. As a complex and technically demanding project, the efficiency and safety of tunnel construction directly affect the overall progress and quality of the project. In the traditional tunnel construction process, the trestle, as a temporary supporting structure, plays an important role in accommodating the passage of transport vehicles and other construction equipment. In recent years, with the improvement of the degree of construction mechanization, the functions of construction equipment have become more diversified and the weight has become heavier. Correspondingly, the load-bearing requirements for the trestles have also increased.

[0003] At present, most common trestles on the market use a two-point support method, and when facing heavier loads, they usually increase the strength of steel or increase the cross-sectional size of structural parts to enhance the bearing capacity of the main load-bearing components. Although these methods can effectively improve the load-bearing performance of the trestles, they also lead to a significant increase in costs. In addition, this reinforcement method will cause a waste of resources and is not conducive to cost savings when the construction site only needs to bear large loads at a low frequency. The reduction in economic benefits has become an issue that construction units cannot ignore. To solve this problem, the patent document with publication number CN205876339U discloses an automatic trestle for tunnel invert construction, including a trestle main body, which is composed of a main beam, a cross beam and a bridge deck pedal; the main beam of the trestle main body is composed of a box beam symmetrically arranged on the left and right sides; the two main beams are connected by a cross beam as a skeleton, and the bridge deck pedal is laid on the cross beam; the upper and lower planes of the main beam are respectively provided with an upper beam rail and a lower beam rail, and the movable support mechanism suspended on the outer side of the main beam moves along the upper beam rail, and correspondingly, the movable support mechanism includes an upper roller and a lower roller moving along the upper beam rail and the lower beam rail, and the upper roller is driven by a hydraulic motor; the front end of the trestle is also provided with a front fixed support mechanism; the rear end is also provided with a driving mechanism. When the trestle is subjected to a heavy load of a vehicle, if the movable support mechanism is also used as a load-bearing support, the lower roller and the lower beam rail are subjected to a large bending moment, which is easy to cause damage, which not only limits the load-bearing capacity of the trestle, but also affects the safety of the vehicle. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a heavy-duty trestle which has a simple structure, is easy to use, has a strong bearing capacity and can improve the safety of vehicles passing through.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A heavy-load trestle comprises a trestle body, the trestle body comprises two rows of main beams arranged in parallel, longitudinal guide rails are provided on the upper and lower parts of the main beams, a first telescopic leg is provided at the front end of the trestle body and a rear support is provided at the rear end, at least one movable support mechanism is provided between the first telescopic leg and the rear support, the movable support mechanism is provided with a second telescopic leg, a movable component cooperating with the longitudinal guide rail and a first cross beam located below the main beam, when a vehicle passes through the trestle body, the first telescopic leg and the second telescopic leg are both in an extended state to provide support for the trestle body, and auxiliary support members for providing support for the main beam and support driving members for driving the auxiliary support members to reciprocate are provided at both ends of the first cross beam.

[0007] As a further improvement of the above technical solution: the movable supporting mechanism is provided with at least two first cross beams spaced apart along the length direction of the main beam.

[0008] As a further improvement of the above technical solution: the auxiliary support member is a support plate.

[0009] As a further improvement of the above technical solution: a transverse guide rail for providing guidance for the auxiliary support member is provided on the first crossbeam.

[0010] As a further improvement of the above technical solution: approach bridges are hingedly connected to the front and rear ends of the trestle body respectively.

[0011] As a further improvement of the above technical solution: a swing driving member is provided between the approach bridge and the trestle body.

[0012] As a further improvement of the above technical solution: the moving component is a roller or a slider.

[0013] As a further improvement of the above technical solution: the movable supporting mechanism is provided in plurality and distributed along the length direction of the main beam.

[0014] As a further improvement of the above technical solution: a plurality of second cross beams are provided between the two rows of main beams, and the plurality of second cross beams are arranged at intervals along the length direction of the main beams.

[0015] As a further improvement of the above technical solution: a bridge deck is laid on the second cross beam.

[0016] Compared with the prior art, the utility model has the following advantages: the heavy-duty trestle of the utility model is provided with a movable support mechanism on the main beam. When the main body of the trestle passes a vehicle, the second telescopic leg, the first telescopic leg and the rear support member of the movable support mechanism located at the target position provide support for the main beam from three positions, thereby enhancing the overall rigidity and load-bearing capacity of the main body of the trestle and reducing the deflection of the main body of the trestle when it is loaded. In addition, the auxiliary support member arranged on the first crossbeam can, under the drive of the support driving member, contact the main beam when the main body of the trestle passes a vehicle, and share the load with the moving parts located at the bottom of the main beam, significantly reducing the bending moment received by the moving parts and the longitudinal guide rails located at the bottom of the main beam, effectively improving the load-bearing capacity and vehicle safety of the heavy-duty trestle. When it is necessary to move the movable support mechanism, the auxiliary support member can be separated from the main beam under the drive of the support driving member, without affecting the movement of the movable support mechanism on the main beam. The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a side structural schematic diagram of a movable supporting mechanism of a heavy-duty trestle in a non-supporting state.

[0018] Figure 2 The utility model is a side structural schematic diagram showing that the movable supporting mechanism of the heavy-duty trestle bridge is in a supporting state.

[0019] Figure 3 The utility model is a front view structural schematic diagram of a movable supporting mechanism of a heavy-duty trestle in a non-supporting state.

[0020] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part A.

[0021] Figure 5 The utility model is a front view structural schematic diagram of a heavy-load trestle when a vehicle passes through.

[0022] Figure 6 Yes Yes Figure 5 Schematic diagram of the enlarged structure of part B.

[0023] Figure 7 It is a front view structural schematic diagram of the heavy-duty trestle bridge of the utility model when the trestle bridge main body moves.

[0024] Figure 8 Yes Yes Figure 7 Schematic diagram of the enlarged structure of part C.

[0025] The numbers in the figure represent: 1. trestle body; 11. main beam; 111. longitudinal guide rail; 12. first telescopic leg; 13. second cross beam; 14. rear support; 2. movable support mechanism; 21. first cross beam; 22. moving part; 221. roller; 23. auxiliary support; 231. transverse guide rail; 24. second telescopic leg; 25. support drive; 3. approach bridge; 4. swing drive; 5. bridge deck. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] Figures 1 to 8An embodiment of the utility model heavy-duty trestle is shown, including a trestle body 1, the trestle body 1 includes two rows of parallel main beams 11, the upper and lower parts of the main beams 11 are provided with longitudinal guide rails 111, the front end of the trestle body 1 is provided with a first telescopic leg 12 and the rear end is provided with a rear support 14, at least one movable support mechanism 2 is provided between the first telescopic leg 12 and the rear support 14, and the movable support mechanism 2 is provided with a second telescopic leg 24, a moving component 22 matched with the longitudinal guide rail 111, and a first cross beam 21 located below the main beam 11. When a vehicle passes through the trestle body 1, the first telescopic leg 12 and the second telescopic leg 24 are both in an extended state to provide support for the trestle body 1, and the two ends of the first cross beam 21 are provided with auxiliary support members 23 for providing support for the main beam 11 and support driving members 25 for driving the auxiliary support member 23 to reciprocate. In this embodiment, the first telescopic leg 12 and the second telescopic leg 24 are driven by a cylinder, which has a simple structure and a large driving force. Of course, in other embodiments, various known driving components or mechanisms can also be used to achieve the purpose. Among them, the front is the direction of tunnel excavation.

[0032] The heavy-duty trestle of this embodiment is provided with a movable support mechanism 2 on the main beam 11. When the trestle body 1 passes a vehicle, the second telescopic leg 24, the first telescopic leg 12 and the rear support member 14 of the movable support mechanism 2 located at the target position provide support for the main beam 11 from three positions, thereby enhancing the overall rigidity and bearing capacity of the trestle body 1 and reducing the deflection of the trestle body 1 when bearing. In addition, the auxiliary support member 23 provided on the first crossbeam 21 can contact the main beam 11 when the trestle body 1 passes a vehicle under the drive of the support driver 25, and share the load of the main beam 11 with the moving member 22 located at the bottom of the main beam 11, significantly reducing the bending moment of the moving member 22 and the longitudinal guide rail 111 located at the bottom of the main beam 11, effectively improving the bearing capacity and vehicle safety of the heavy-duty trestle. When it is necessary to move the movable support mechanism 2, the auxiliary support member 23 can be separated from the main beam 11 under the drive of the support driver 25, without affecting the movement of the movable support mechanism 2 on the main beam 11. The structure is simple and easy to use.

[0033] Furthermore, in this embodiment, the movable support mechanism 2 is provided with at least two first cross beams 21 spaced apart along the length direction of the main beam 11. The auxiliary support members 23 on the plurality of first cross beams 21 can share the load from the main beam 11, and the bending moment of the movable member 22 located at the lower part of the main beam 11 is smaller, which further improves the load-bearing capacity and vehicle safety of the heavy-load trestle.

[0034] Furthermore, in this embodiment, the auxiliary support member 23 is a support plate. When a heavy-loaded trestle passes a vehicle, the support plate is driven by the support driving member 25 to move to the bottom surface of the main beam 11 to provide support for the main beam 11, which has a simple structure and reliable support.

[0035] Furthermore, in this embodiment, a transverse guide rail 231 is provided on the first crossbeam 21 for providing guidance for the auxiliary support member 23. The transverse guide rail 231 is provided to improve the accuracy of the reciprocating motion of the auxiliary support member 23 during long-term use and reduce the resistance during motion.

[0036] Furthermore, in this embodiment, the front and rear ends of the pier body 1 are respectively hinged with an approach bridge 3, and a swing driving component 4 is provided between the approach bridge 3 and the pier body 1. The swing driving component 4 is used to control the inclination angle of the approach bridge 3 so that the heavy-load pier is suitable for different terrain conditions.

[0037] Furthermore, in this embodiment, the moving component 22 is a roller 221. The roller 221 has a simple structure, reliable operation, and small friction resistance with the longitudinal guide rail 111. In other embodiments, the moving component 22 may also be a slider or other components.

[0038] Furthermore, in other embodiments, a plurality of movable support mechanisms 2 may be provided and distributed along the length direction of the main beam 11, further enhancing the rigidity of the trestle body 1 when vehicles pass through, and improving the load-bearing weight and vehicle safety of the heavy-loaded trestle.

[0039] Furthermore, in this embodiment, a plurality of second cross beams 13 are provided between the two rows of main beams 11, and the plurality of second cross beams 13 are arranged at intervals along the length direction of the main beams 11. The plurality of second cross beams 13 enhance the connection strength between the two rows of main beams 11 and strengthen the stability of the overall structure of the trestle body 1.

[0040] Furthermore, in this embodiment, a bridge deck 5 is provided on the second cross beam 13 to provide a solid and flat passage surface for vehicles to pass through.

[0041] The method of using the heavy-duty trestle of the utility model is as follows:

[0042] In the initial state, the movable support mechanism 2 is located at the front end of the main beam 11 (see Figure 1 , Figure 3 , Figure 4 ), when there is a need for passing vehicles, the movable support mechanism 2 moves to the target position in the middle of the main beam 11, first uses the support driving member 25 to drive the support plate to move to the bottom surface of the main beam 11 for support, then extends the second telescopic leg 24 to contact the ground, and supports the main beam together with the first telescopic leg 12 and the rear support member 14, and finally the vehicle passes (see Figure 2 , Figure 5 , Figure 6 ).

[0043] It should be noted that the movable support mechanism 2 also participates in the step-by-step movement process of the heavy-loaded trestle. When the heavy-loaded trestle needs to move forward to the next construction section of the tunnel, the movable support mechanism 2 first moves to the front end of the main beam 11, extends the second telescopic leg 24 to contact the ground (see Figure 7 , Figure 8 ), then use the swing drive member 4 to lift the approach bridge 3 off the ground, raise the first telescopic leg 12, and finally use the running components (such as running wheels, crawler tracks, etc.) at the rear end of the trestle body 1 to drive the trestle body 1 to move forward to the next construction section with the movable support mechanism 2 as the fulcrum.

[0044] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A heavy-load trestle, comprising a trestle body (1), the trestle body (1) comprising two rows of parallel main beams (11), the main beams (11) being provided with longitudinal guide rails (111) at the upper and lower parts, the trestle body (11) being provided with a first telescopic leg (12) at the front end and a rear support member (14) at the rear end, at least one movable support mechanism (2) being provided between the first telescopic leg (12) and the rear support member (14), the movable support mechanism (2) being provided with a second telescopic leg (24), a movable component (22) cooperating with the longitudinal guide rail (111) and a first cross beam (21) located below the main beam (11), characterized in that: When a vehicle passes through the trestle bridge body (1), the first telescopic leg (12) and the second telescopic leg (24) are both in an extended state to provide support for the trestle bridge body (1), and auxiliary support members (23) for providing support for the main beam (11) and support driving members (25) for driving the auxiliary support members (23) to move back and forth are provided at both ends of the first crossbeam (21).

2. The heavy-duty trestle according to claim 1, characterized in that: The movable support mechanism (2) is provided with at least two first cross beams (21) spaced apart along the length direction of the main beam (11).

3. The heavy-duty trestle according to claim 1, characterized in that: The auxiliary support member (23) is a support plate.

4. The heavy-duty trestle according to claim 1, characterized in that: The first crossbeam (21) is provided with a transverse guide rail (231) for providing guidance for the auxiliary support member (23).

5. The heavy-duty trestle according to any one of claims 1 to 4, characterized in that: The front and rear ends of the trestle main body (1) are respectively hinged with approach bridges (3).

6. The heavy-duty trestle according to claim 5, characterized in that: A swing driving member (4) is provided between the approach bridge (3) and the trestle body (1).

7. The heavy-duty trestle according to any one of claims 1 to 4, characterized in that: The moving component (22) is a roller (221) or a slider.

8. The heavy-duty trestle according to any one of claims 1 to 4, characterized in that: The movable support mechanisms (2) are provided in plurality and are distributed along the length direction of the main beam (11).

9. The heavy-duty trestle according to any one of claims 1 to 4, characterized in that: A plurality of second cross beams (13) are arranged between the two rows of main beams (11), and the plurality of second cross beams (13) are arranged at intervals along the length direction of the main beams (11).

10. The heavy-duty trestle according to claim 9, characterized in that: A bridge deck (5) is laid on the second cross beam (13).

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