Steel structure trestle and construction method thereof

Abstract

The application discloses a steel structure trestle, which comprises a trestle frame, one end of which is erected on a wharf; a trestle ramp, one end of which is rotationally connected with the trestle frame through a rotation connecting device, the rotation connecting device comprising a rotation structure, which is rotationally arranged at one end of the trestle frame away from the wharf; a connecting plate, one end of which is movably arranged on the rotation structure, the other end of the connecting plate being connected with the trestle ramp; and a ramp support structure, one end of which is movably arranged on the trestle ramp, the other end of which is arranged on a support structure of the trestle frame. The rotation structure is rotationally arranged, the gradient of the trestle ramp is adjusted to meet the requirements of various gradients. The application further discloses a construction method of the steel structure trestle, which is simple to operate and can meet the requirements of various gradients of the trestle ramp without cutting the trestle ramp.

Description

Technical Field

[0001] This invention relates to the field of trestle technology. More specifically, this invention relates to a steel structure trestle and its construction method. Background Technology

[0002] A trestle, shaped like a bridge, is a temporary bridge structure used in stations, ports, mines, or factories for loading and unloading goods, boarding and alighting passengers, or for traffic, machinery placement, and overhead operations at construction sites. In railway ferries, trestle bridges are bridge structures that allow locomotives and rolling stock to drive onto and off the ferry. The structure of a trestle bridge is basically the same as a bridge, but unlike a bridge where the beams and rails are fixed and span the entire river, the beams and rails of a trestle bridge can rise and fall with the water level, and the rail slope can be adjusted accordingly.

[0003] Based on the materials used, trestle bridges can be divided into wooden trestle bridges and steel trestle bridges. Wooden trestle bridges, due to the large amount of wood used, are prone to corrosion and even breakage. Steel trestle bridges, on the other hand, have advantages such as short construction period, less steel usage, and high safety factor. As a result, steel trestle bridges are being used more and more widely, and their proportion in trestle bridge structures is also increasing.

[0004] The authorized patent application with application number 201921820755.0 discloses a prefabricated steel structure trestle bridge. By using bolted connections between the trestle frame and ramp slabs, it improves the ease of installation and provides good connection tightness and structural stability. However, the ramp slabs and trestle frame are fixed, making it unsuitable for ferry trestle bridges where the ramp surface needs adjustment according to water level fluctuations. This results in inconvenience and limited application. Therefore, designing steel structure trestle bridges that allow for easy ramp adjustment and meet various slope requirements is a worthwhile area for consideration. Summary of the Invention

[0005] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0006] To achieve these objectives and other advantages according to the present invention, a steel structure trestle bridge is provided, comprising:

[0007] A pier frame, with one end erected on the dock;

[0008] A trestle ramp, one end of which is rotatably connected to the trestle frame via a rotating connection device, the rotating connection device comprising:

[0009] A rotating structure, wherein the limiting rotation is located at the end of the trestle frame away from the dock;

[0010] A connecting plate, one end of which is limited and movable through the rotating structure, and the other end of which is connected to the trestle ramp;

[0011] The ramp support structure has one end slidably mounted on the ramp of the trestle bridge, and the other end mounted on the support structure of the trestle bridge frame.

[0012] Preferably, the end of the trestle bridge away from the dock has a connection port along its length, and the rotating structure is disposed on the connection port. The rotating structure includes:

[0013] A pair of fixing plates are respectively disposed at the upper and lower ends of the connection port. The opposite sides of the pair of fixing plates are arc-shaped, and the arc-shaped openings are arranged opposite each other.

[0014] A pair of skateboards, each skateboard sliding on a pair of fixed plates;

[0015] The rotating plate has a circular cross-section, and its upper and lower sides are respectively movably engaged with a pair of sliding plates.

[0016] Preferably, the rotating plate has a movable groove along its radial direction;

[0017] One end of the connecting plate is movably inserted into the movable slot, and a baffle is provided at one end of the trestle.

[0018] Preferably, the support structure of the trestle frame includes multiple pairs of trestle support columns, which are spaced apart on both sides of the bottom of the trestle frame.

[0019] Preferably, the ramp support structure includes:

[0020] A pair of slide rails are provided on both sides of the bottom surface of the trestle ramp along its length, and sliders are slidably mounted on the slide rails.

[0021] A pair of linear actuators, each with its moving end connected to a pair of sliders, and the fixed end of the linear actuators is inclinedly mounted on the trestle support located at the end away from the dock.

[0022] Preferably, the linear actuator is a linear hydraulic cylinder.

[0023] Preferably, it also includes a pair of ramp lifting structures, which are correspondingly arranged on both sides of the trestle frame. The ramp lifting structure includes a column on the trestle frame, a fixed pulley on the top of the column, and a steel cable wound and connected to the fixed pulley. One end of the steel cable is connected to the trestle ramp, and the other end is wound and arranged on a winch, which is arranged on the trestle frame.

[0024] Preferably, an expansion joint is provided between the trestle frame and the trestle ramp, and a U-shaped plate is provided on the expansion joint, with an elastic layer injected inside the U-shaped plate.

[0025] A construction method for the aforementioned steel structure trestle bridge is provided, comprising the following steps:

[0026] Step 1: After setting up multiple pairs of trestle support pillars at intervals in the construction area, hoist the trestle frame onto the top of the multiple pairs of trestle support pillars and fix it in place;

[0027] Step 2: Open a connection port at the end of the trestle frame away from the dock, and install the trestle ramp with the prefabricated rotating connection device onto the trestle frame through the connection port;

[0028] Step 3: After installing the ramp lifting structure onto the trestle frame, wind one end of the steel cable in the ramp lifting structure around the winch and fix the other end to the trestle ramp for temporary support. Then install the ramp support structure and support the trestle ramp.

[0029] Step 4: Install U-shaped plates in the expansion joints between the trestle frame and the trestle ramp, and fill the U-shaped plates with an elastic filling layer.

[0030] The present invention has at least the following beneficial effects:

[0031] First, the present invention uses a rotating connection device formed by a fixed plate, a sliding plate, a rotating plate, and a connecting plate to achieve a limiting rotating connection of the trestle ramp to the trestle frame, so as to realize convenient adjustment of the slope of the trestle ramp. This meets the needs of adjusting the slope of the trestle ramp due to changes in the height difference between the ship and the trestle frame caused by the rise and fall of water level and other reasons, without having to change its slope by cutting.

[0032] Secondly, the ramp support structure provided by this invention can not only provide support for the trestle ramp, but also adjust the slope of the trestle ramp to meet the needs of various slopes.

[0033] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0034] Figure 1 This is a side view of the steel structure trestle bridge according to one of the technical solutions of the present invention;

[0035] Figure 2 This is a side view of the rotating connection device according to one of the technical solutions of the present invention;

[0036] Figure 3 This is a side view of the rotary connection device in another state according to one of the technical solutions of the present invention;

[0037] Figure 4 This is a side view of the rotating plate according to one of the technical solutions of the present invention;

[0038] Figure 5 This is a bottom view of the trestle ramp according to one of the technical solutions of the present invention. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0040] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0041] like Figures 1-5 As shown, the present invention provides a steel structure trestle bridge, comprising:

[0042] A trestle frame 1, one end of which is erected on the dock; the trestle frame 1 can be a prefabricated trestle frame 1, so as to facilitate the assembly into a large-span steel structure trestle. One end of the trestle frame 1 can be erected on the dock through a trestle ramp 2 or a plank. Trestle railings can also be installed on both sides of the trestle frame 1 to prevent pedestrians or vehicles from falling into the water.

[0043] The ramp 2, one end of which is rotatably connected to the trestle frame 1 via a rotating connection device 6, the rotating connection device 6 comprising:

[0044] A rotating structure is provided, with its limiting rotational setting located at one end of the trestle frame 1 away from the dock. The rotating structure may consist of a fixed plate 61, a rotating plate 63, and a sliding plate 62 sandwiched between the fixed plate 61 and the rotating plate 63. The rotating structure may be made of stainless steel or carbon steel to have high strength and high hardness, thereby increasing the stability of the rotating structure. The sliding plate 62 may also be lubricated to facilitate the limiting rotation of the steel fixed plate 61 and the rotating plate 63.

[0045] A connecting plate 64 is provided, with one end of which is movably mounted on the rotating structure, and the other end of which is connected to the trestle ramp 2. The connecting plate 64 can be made of stainless steel or carbon steel. One end of the connecting plate 64 can be movably mounted on the rotating structure through a movable slot 631 provided on the rotating structure, while the other end of the connecting plate 64 is fixedly connected to the trestle ramp 2 by welding. The trestle ramp 2 is rotatably connected to the trestle frame 1 through the rotating structure and the connecting plate 64, so as to meet the requirement that the slope of the trestle ramp 2 can be adjusted according to the rise and fall of the water level.

[0046] The ramp support structure has one end slidably mounted on the ramp 2 of the trestle bridge, and the other end mounted on the support structure of the trestle bridge frame 1. The ramp support structure can be a linear actuator 4 or a telescopic support assembly consisting of two support rods, positioning holes, and bolts and nuts. One end of the ramp support structure can be tilted and fixedly mounted on the support structure of the trestle bridge frame 1, and the other end of the ramp support can be slidably mounted on the ramp 2 of the trestle bridge via a slide rail 21 and a slider 22, so that the ramp support structure can both support the ramp 2 of the trestle bridge and drive the ramp 2 of the trestle bridge to rotate.

[0047] In the above technical solution, the trestle frame 1 is first erected in the construction area using its support structure, with one end connected to the dock via the trestle ramp 2 or a plank. The ramp 2 is then installed at one end of the trestle frame 1 using the rotating connection device 6. Finally, both ends of the ramp support structure are inclinedly installed onto the support structure of the trestle frame 1 and the bottom surface of the ramp 2, thus completing the construction of the steel structure trestle. The connecting plate 64 in the rotating connection device 6, at the end furthest from the trestle frame 1, is pre-welded and fixed to the ramp 2. To facilitate quick installation of the trestle ramp 2; the inclined and limiting sliding settings at both ends of the ramp support structure facilitate the provision of support force for the trestle ramp 2, and also ensure that when the slope of the trestle ramp 2 needs to be changed due to water level fluctuations, the limiting sliding of the ramp support structure will not cause rigid tension or compression, thus compressing its support performance; when the water level changes, or when it is necessary to replace the vessel with one of different heights, one end of the trestle ramp 2 can be rotated and mounted on the trestle frame 1 through the rotating plate 63 and the rotating structure to adjust the slope of the trestle ramp 2, without causing rigid damage due to a fixed slope.

[0048] In another technical solution, the end of the trestle frame 1 facing away from the dock has a connection port 11 along its length, and the rotating structure is disposed on the connection port 11. The rotating structure includes:

[0049] A pair of fixing plates 61 are respectively disposed at the upper and lower ends of the connection port 11. The opposite sides of the pair of fixing plates 61 are arc-shaped, and the arc-shaped openings are arranged opposite each other. The fixing plates 61 are fixed to the inner sidewalls of the bridge frame 1 located at both ends of the connection port 11 by welding or screws and nuts. The width of the fixing plate 61 is slightly less than or equal to the width of the bridge frame 1 to increase the stable connection between the fixing plate 61 and the bridge frame 1.

[0050] A pair of sliding plates 62 are respectively slidably disposed on a pair of fixed plates 61; the sliding plates 62 may be polytetrafluoroethylene plates, and the cross-sectional shape of the sliding plates 62 is arc-shaped and has the same arc size as the fixed plates 61, so that the sliding plates 62 can slide closely on the fixed plates 61, thereby increasing the smoothness of the sliding of the rotating structure;

[0051] The rotating plate 63 has a circular cross-section. The upper and lower sides of the rotating plate 63 are respectively movably engaged with a pair of sliding plates 62. The rotating plate 63 is slidably positioned on the sliding plates 62. With the assistance of the sliding plates 62, the rotating plate 63 can rotate with the fixed plate 61, thus achieving a rotatable mounting on the bridge frame 1.

[0052] In the above technical solution, a pair of fixed plates 61 are first welded to the upper and lower ends of the connection port 11, then the rotating plate 63 is placed in the gap between the pair of fixed plates 61, and then a pair of sliding plates 62 are correspondingly locked between the rotating plate 63 and the pair of fixed plates 61, so that the sliding plates 62 are slidably clamped between the rotating plate 63 and the fixed plates 61, so that the rotation is on the fixed plate 61, thereby realizing the rotation function of the rotating structure.

[0053] In another technical solution, the rotating plate 63 is provided with a movable groove 631 along its radial direction;

[0054] One end of the connecting plate 64 is movably inserted through the movable groove 631, and a baffle 65 is provided at one end of the trestle. The height of the movable groove 631 is greater than the thickness of the connecting plate 64, so that the connecting plate 64 has a certain vertical movement space. When the rotating plate 63 rotates, there will be no rigid collision, which will hinder the rotation of the rotating plate 63. The baffle 65 not only helps to limit the rotation of the rotating plate 63, but also prevents one end of the connecting plate 64, which is movably inserted through the rotating plate 63, from detaching from the rotating plate 63, thus preventing the rotating structure from realizing its rotation function.

[0055] In another technical solution, the support structure of the trestle frame 1 includes multiple pairs of trestle support columns 3, which are spaced apart on both sides of the bottom of the trestle frame 1; the trestle support columns 3 provide support for the trestle frame 1 so that the trestle frame 1 can bear the weight of vehicles and pedestrians, as well as resist the impact of wind and water.

[0056] In another technical solution, the ramp support structure includes:

[0057] A pair of slide rails 21 are arranged on both sides of the bottom surface of the trestle ramp 2 along the length direction of the ramp. A slider 22 is slidably arranged on the slide rails 21. When the slope of the trestle ramp 2 needs to be changed, the slider 22 drives the slide rails 21 to rotate, and the trestle ramp 2 will also rotate under the drive of the slide rails 21.

[0058] A pair of linear actuators 4, each with its moving end connected to a pair of sliders 22, and its fixed end inclinedly mounted on the trestle support 3 located away from the dock. The linear actuators 4 can be electric push rods or linear hydraulic cylinders. The fixed ends of the linear actuators 4 are fixedly and inclinedly mounted on the side of the trestle support 3 located away from the dock. The moving ends of the linear actuators 4 are fixedly connected to the sliders 22 by welding. When the slope of the trestle ramp 2 needs to be changed, the linear actuators 4 can provide driving force, extending or shortening their moving ends to drive the trestle ramp 2 to rotate, thereby adjusting the slope of the trestle ramp 2.

[0059] In the above technical solution, when the height difference between the ship and the trestle frame 1 changes due to water level fluctuations or other reasons, and the slope of the trestle ramp 2 needs to be adjusted, the linear actuator 4 provides driving force to extend or pull back the slider 22, thereby driving the slide rail 21 and the trestle ramp 2 to extend or pull back, thus realizing the adjustment of the slope of the trestle ramp 2; when the required slope is adjusted, the linear actuator 4 stops working, providing support for the trestle ramp 2 so as to bear the weight of vehicles and pedestrians.

[0060] In another technical solution, the linear actuator 4 is a linear hydraulic cylinder; specifically, the linear hydraulic cylinder can be of model HSGL01-250, and the linear hydraulic cylinder has the advantages of easily obtaining linear reciprocating motion and large output force, simple structure, and reliable operation.

[0061] In another technical solution, a pair of ramp lifting structures 5 are also included. The pair of ramp lifting structures 5 are correspondingly arranged on both sides of the trestle frame 1. Each ramp lifting structure 5 includes a column 51 mounted on the trestle frame 1, a fixed pulley 52 mounted on the top of the column 51, and a steel cable 53 wound and connected to the fixed pulley 52. ​​One end of the steel cable 53 is connected to the trestle ramp 2, and the other end is wound around a winch 9, which is mounted on the trestle frame 1. Specifically, when the trestle ramp 2 passes through the... When the rotating connecting device 6 is rotatably installed on the trestle frame 1, the trestle ramp 2 can be lifted by the steel cable 53 wound around the fixed pulley 52, providing temporary support for the installation of the ramp support structure; wherein, by tightening or loosening the steel cable 53 by the winch 9, the trestle ramp 2 can be rotated upward or downward, adjusting its angle to facilitate the installation of the ramp support structure; the fixed pulley 52 on the column 51 changes the direction of the tension of the steel cable 53, making it easier for the winch 9 to tighten or loosen the steel cable 53.

[0062] In another technical solution, an expansion joint is provided between the trestle frame 1 and the trestle ramp 2. A U-shaped plate 7 is provided on the expansion joint, and an elastic layer 8 is injected into the U-shaped plate 7. Specifically, the two ends of the U-shaped plate 7 are fixed to the trestle frame 1 and the trestle ramp 2 by welding, respectively. The U-shaped plate 7 is a thin-walled steel plate that is easily deformable, to prevent the elastic layer 8 from flowing into the rotating structure during the injection construction and affecting the rotation performance of the rotating connection device 6. The elastic layer 8 can be a polyurethane elastic sealant or an epoxy resin sealant. It is liquid before construction and is shaped according to the space of the expansion joint after construction to ensure that the elastic layer 8 can effectively fill the gap, so that pedestrians or vehicles can comfortably pass through the connection between the trestle frame 1 and the trestle ramp 2, and its performance connection performance is not affected when the trestle ramp 2 rotates.

[0063] A construction method for the aforementioned steel structure trestle bridge is provided, comprising the following steps:

[0064] Step 1: After setting up multiple pairs of trestle support columns 3 at intervals in the construction area, hoist the trestle frame 1 onto the top of the multiple pairs of trestle support columns 3 and fix it. Specifically, set up multiple pairs of trestle support columns 3 at intervals as required in the construction area, and then hoist the trestle frame 1 onto the top of the trestle support columns 3 using a crane, and fix it by welding or screws and nuts. The distance between a pair of trestle support columns 3 is equal to or slightly less than the width of the trestle frame 1, and the distance between two adjacent pairs of trestle columns is set according to the length of the trestle frame 1 to provide sufficient support.

[0065] Step 2: Open a connection port 11 at the end of the trestle frame 1 away from the dock, and install the trestle ramp 2 with the prefabricated rotating connection device 6 onto the trestle frame 1 through the connection port 11; specifically, fix one end of the connecting plate 64 without the baffle 65 in the rotating device to one end of the trestle ramp 2 by welding, and then fix the pair of fixing plates 61 at the other end of the rotating connection device 6 to the upper and lower ends of the connection port 11 by welding using a crane. The rotating device can be pre-assembled, or it can be installed on the trestle frame 1 in the order of fixing plate 61, rotating plate 63, and sliding plate 62 during the installation of the trestle ramp 2.

[0066] Step 3: After installing the ramp lifting structure 5 onto the trestle frame 1, wind one end of the steel cable 53 in the ramp lifting structure 5 around the winch 9 and fix the other end to the trestle ramp 2 for temporary support. Then install the ramp support structure and support the trestle ramp 2. The ramp lifting structure 5 provides temporary support for the installation of the ramp support structure, and the winch 9 can tighten or loosen the steel cable 53 connected to the fixed pulley 52 to make the trestle ramp 2 rotate up and down to facilitate the installation of the ramp support structure.

[0067] Step 4: Install a U-shaped plate 7 in the expansion joint between the trestle frame 1 and the trestle ramp 2, and fill the U-shaped plate 7 with an elastic layer 8; wherein, the elastic layer 8 helps to fill the expansion joint, so that the trestle frame 1 and the trestle ramp 2 are connected as one unit to facilitate the passage of pedestrians or vehicles. Because the elastic layer 8 and the U-shaped plate 7 have deformable properties, they can still maintain their connecting function when the trestle ramp 2 is rotated to adjust the slope.

[0068] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A steel structure trestle bridge, characterized in that, include: A pier frame, with one end erected on the dock; A trestle ramp, one end of which is rotatably connected to the trestle frame via a rotating connection device, the rotating connection device comprising: A rotating structure, wherein the limiting rotation is located at the end of the trestle frame away from the dock; A connecting plate, one end of which is limited and movable through the rotating structure, and the other end of which is connected to the trestle ramp; The ramp support structure has one end slidably mounted on the ramp of the trestle bridge, and the other end mounted on the support structure of the trestle bridge frame. The trestle frame has a connection port along its length at one end away from the dock, and the rotating structure is disposed on the connection port. The rotating structure includes: A pair of fixing plates are respectively disposed at the upper and lower ends of the connection port. The opposite sides of the pair of fixing plates are arc-shaped, and the arc-shaped openings are arranged opposite each other. A pair of skateboards, each skateboard sliding on a pair of fixed plates; The rotating plate has a circular cross-section, and its upper and lower sides are respectively movably engaged with a pair of sliding plates. The rotating plate has a movable groove along its radial direction; One end of the connecting plate is movably inserted into the movable slot, and a baffle is provided at one end of the trestle frame.

2. The steel structure trestle bridge as described in claim 1, characterized in that, The supporting structure of the trestle frame includes multiple pairs of trestle support columns, which are spaced apart on both sides of the bottom of the trestle frame.

3. The steel structure trestle bridge as described in claim 2, wherein the ramp support structure comprises: A pair of slide rails are provided on both sides of the bottom surface of the trestle ramp along its length, and sliders are slidably mounted on the slide rails. A pair of linear actuators, each with its moving end connected to a pair of sliders, and the fixed end of the linear actuators is inclinedly mounted on the trestle support located at the end away from the dock.

4. The steel structure trestle bridge as described in claim 3, characterized in that, The linear actuator is a linear hydraulic cylinder.

5. The steel structure trestle bridge as described in claim 1, characterized in that, It also includes a pair of ramp lifting structures, which are respectively arranged on both sides of the trestle frame. The ramp lifting structure includes a column set on the trestle frame, a fixed pulley set on the top of the column, and a steel cable wound and connected to the fixed pulley. One end of the steel cable is connected to the trestle ramp, and the other end is wound and arranged on a winch. The winch is set on the trestle frame.

6. The steel structure trestle bridge as described in claim 1, characterized in that, An expansion joint is provided between the trestle frame and the trestle ramp. A U-shaped plate is installed on the expansion joint, and an elastic layer is injected into the U-shaped plate.

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