Steel trestle capable of resisting flood in flood season and flood resisting method thereof

Abstract

This invention provides a steel trestle bridge capable of withstanding floods during the flood season and its flood control method. The steel trestle bridge includes a trestle body spanning a river and supporting columns. The upper ends of the supporting columns are supported on the trestle body. Each supporting column includes a cast-in-place pile, a first expansion joint, and a second expansion joint. The cast-in-place pile includes a pile column and a crossbeam located at the upper end of the pile column. A steel pipe column is supported at the upper end of the cast-in-place pile. The lower end of the steel pipe column is rotatably connected to the cast-in-place pile, allowing the steel pipe column to have both a vertical and a horizontal state. One end of the first expansion joint is hinged to the side wall of the steel pipe column, and the other end is hinged to the crossbeam. The second expansion joint is supported between the top of the steel pipe column and the lower end of the trestle body. One of the steel pipe column and the trestle body is fixedly connected to the second expansion joint, and the other is detachably connected to the second expansion joint. In the steel trestle bridge and its flood control method of this invention, the steel pipe column is laid down to a horizontal position to avoid damage to the steel trestle bridge.

Description

Technical Field

[0001] This invention relates to the field of bridges, and more specifically, to a steel trestle bridge that can withstand floods during the flood season and a flood control method thereof. Background Technology

[0002] Steel trestle bridges are temporary bridge facilities built in civil engineering for transporting materials, equipment, and personnel. During the flood season, floods are more likely to occur. As a temporary bridge structure, the structural strength and stability of steel trestle bridges are inferior to those of permanent bridges. Excessive floods can easily cause the steel pipe columns under the steel trestle bridge to be damaged by impact or even break, which in turn affects the entire bridge and causes damage to the entire bridge structure.

[0003] Both patent CN08755377B and patent application CN116289488A involve flood control measures for steel trestle bridges. Both involve adding supporting and reinforcing structures to the steel trestle bridge structure to improve its overall flood resistance. However, while increasing the construction cost of the steel trestle bridge, both still cannot avoid the risk of the steel pipe columns being damaged by floods and causing traction on the steel trestle bridge. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a steel trestle bridge that can resist floods during the flood season and a flood control method thereof.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] On one hand, the present invention provides a steel trestle bridge that can withstand floods during the flood season, comprising a trestle bridge body spanning a river channel and at least one set of support columns disposed in the river channel, wherein the upper ends of the at least one set of support columns are supported on the trestle bridge body, and the support columns include:

[0007] A cast-in-place pile includes a pile column and a crossbeam located at the upper end of the pile column. At least one set of steel pipe columns are supported at the upper end of the cast-in-place pile. The lower end of the steel pipe columns is rotatably connected to the cast-in-place pile, and the axis of rotation is horizontal, so that the steel pipe columns have a vertical state and a horizontal state after being laid down.

[0008] A first telescopic device, one end of which is hinged to the side wall of the steel pipe column and the other end of which is hinged to the crossbeam, is used to drive the steel pipe column to switch between a vertical and a horizontal state; and

[0009] The second telescopic device is supported between the top of the steel pipe column and the lower end of the trestle body; one of the steel pipe column and the trestle body is fixedly connected to the second telescopic device, and the other is detachably connected to the second telescopic device, so that the support column can be detached from the trestle body before the steel pipe column is switched to a horizontal state.

[0010] Furthermore, the cast-in-place piles are either a group of piles or a single pile structure.

[0011] Furthermore, the cast-in-place pile includes two sets of pile columns, and the crossbeam is a ground-supported beam connecting the tops of the two sets of pile columns.

[0012] Furthermore, the steel pipe column and the cast-in-place pile are connected by hinges.

[0013] Furthermore, the hinge includes two sets of stacked hinge pads and a hinge pin connecting the two sets of hinge pads on the same side; both sets of hinge pads and the hinge pin are made of steel.

[0014] Furthermore, the first telescopic device and / or the second telescopic device are hydraulic jacks.

[0015] Furthermore, two sets of steel pipe columns are provided on the cast-in-place pile, and the sidewalls of each set of steel pipe columns are connected to the crossbeam through a set of the first expansion joint.

[0016] On the other hand, the present invention provides a flood control method for a steel trestle bridge that can resist floods during the flood season, comprising the following steps:

[0017] S1. Retract the second telescopic device to disengage the support column from the main body of the trestle bridge;

[0018] S2. Drive the steel pipe column to a horizontal position through the first telescopic device.

[0019] Furthermore, in step S2, the steel pipe column is laid flat on the crossbeam.

[0020] Furthermore, in step S2, the steel pipe column is laid down along the direction of the flood flow.

[0021] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0022] In the present invention, a steel trestle bridge and its flood control method that can withstand floods during the flood season, when a flood arrives, the upper end of the steel pipe column is detached from the support of the steel trestle bridge body by contracting the second telescopic device. The steel trestle bridge body is suspended in the air by its own structural strength, and the bridge surface cannot be used for pedestrian and cargo traffic. Then, the steel pipe column is laid down to a horizontal position by the first telescopic device, reducing the frontal contact area between the steel pipe column and the flood impact. This avoids the risk of damage to the steel pipe column surface by the flood impact and also avoids damage to the steel trestle bridge body due to impact damage to the steel pipe column. After the flood recedes, the steel pipe column can be restored to its upright supporting state. Attached Figure Description

[0023] Figure 1 This is an elevation view of a steel trestle bridge according to one embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of a steel trestle bridge in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram illustrating the connection relationship between the steel pipe column and the cast-in-place pile in one embodiment of the present invention;

[0026] Figure 4 This is a diagram showing the steel pipe column in a horizontal state in another embodiment of the present invention.

[0027] Icons: 1-Trestling body, 2-Support column, 20-Cast-in pile, 200-Pile column, 201-Crossbeam, 21-Steel pipe column, 30-Second expansion joint, 40-First expansion joint, 50-Hinge, 500-Hinge pad, 501-Hinge pin. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Example 1:

[0030] Reference Figures 1 to 3 This embodiment provides a steel trestle bridge that can withstand floods during the flood season, including a trestle bridge body 1. The trestle bridge body 1 spans both sides of the river. When constructing the steel trestle bridge, the trestle bridge body 1 must be higher than the highest flood level b to avoid the steel structure and bridge deck of the trestle bridge body 1 being soaked by water.

[0031] Reference Figure 1 At least one set of support columns 2 is provided at the lower end of the bridge deck of the trestle body 1, that is, the number of support columns 2 is set according to the length of the trestle body 1; in this embodiment, the bridge deck span of the trestle body 1 is 50m, and the middle part of the trestle body 1 is supported by a set of support columns 2.

[0032] The support column 2 includes a cast-in-place pile 20, a steel pipe column 21, a first expansion joint 40, and a second expansion joint 30.

[0033] The cast-in-place pile 20 includes a pile column 200 and a crossbeam 201 located at the upper end of the pile column 200. The number of pile columns 200 included in each group of cast-in-place piles 20 can be different, that is, the cast-in-place pile 20 can be a group pile or a single pile structure; refer to Figure 2In this embodiment, the cast-in-place pile 20 has two sets of pile columns 200. The lower ends of the two sets of pile columns 200 are cast to a sufficient depth below the riverbed a to ensure the structural strength of the cast-in-place pile 20. When the cast-in-place pile 20 has two sets of pile columns 200, the crossbeam 201 is a ground beam connecting the tops of the two sets of pile columns 200.

[0034] The upper end of the crossbeam 201 supports one or more sets of steel pipe columns 21. In this embodiment, two sets of steel pipe columns 21 are provided on the upper end of the crossbeam 201. The lower end of the steel pipe column 21 is rotatably connected to the cast-in-place pile 20, and the rotation axis of the cast-in-place pile 20 is horizontal, so that the steel pipe column 21 has a vertical state and a horizontal state after being laid down. That is, each set of steel pipe columns 21 can be supported vertically on the crossbeam 201, or it can be laid down horizontally. The vertical and horizontal states of the steel pipe column 21 are achieved through the following structure:

[0035] Reference Figure 2 and Figure 3 The lower end of the steel pipe column 21 and the upper end of the cast-in-place pile 20 are connected by a hinge 50. The hinge 50 includes two sets of stacked hinge pads 500 and a hinge pin 501 connecting the two sets of hinge pads 500 on the same side. Both sets of hinge pads 500 and the hinge pin 501 are made of steel. The hinge pads 500 on the cast-in-place pile 20 are pre-embedded and cast in place. The hinge pads 500 at the lower end of the steel pipe column 21 can be connected by bolts or welding.

[0036] In some embodiments, the thickness of both sets of hinge pads 500 is h1, the hinge pads 500 are square, and the shortest straight-line distance from the hinge pads 500 to the outer wall of the steel pipe column 21 is h2. Therefore, h2 should be less than twice h1.

[0037] In addition, in some embodiments, in order to make the steel pipe column 21 more stable in the vertical state, the steel pipe column 21 and the lower end of the cast-in-place pile 20, and the steel pipe column 21 and the hinge pad 500 located on the cast-in-place pile 20 can be locked with bolts around the hinge 50. The bolts need to be removed before the steel pipe column 21 is laid down to the horizontal state.

[0038] Reference Figure 2 Each set of steel pipe columns 21 is hinged to a set of first telescopic devices 40 on its side wall. The other end of the first telescopic device 40 is hinged to the crossbeam 201. With the extension and retraction of the first telescopic device 40, the steel pipe column 21 can be driven to switch between vertical and horizontal states.

[0039] In addition, the upper end of each set of steel pipe columns 21 is connected to the trestle body 1 through a second telescopic device 30. One of the steel pipe columns 21 and the trestle body 1 is fixedly connected to the second telescopic device 30, and the other is detachably connected to the second telescopic device 30. That is, the second telescopic device 30 can be fixedly installed on the top of the steel pipe column 21 or on the lower end surface of the trestle body 1. Before the steel pipe column 21 is laid down to a horizontal state, the extension and retraction of the second telescopic device 30 can cause the steel pipe column 21 in the support column 2 to be disconnected from the support connection with the trestle body 1.

[0040] In some embodiments, to make the structure of the steel pipe column 21 supporting the trestle body 1 via the second telescopic device 30 more stable, a bolt reinforcement structure can be set between the steel pipe column 21 and the trestle body 1, between the second telescopic device 30 and the trestle body 1 (in which case the second telescopic device 30 and the trestle body 1 are detachably connected), or between the steel pipe column 21 and the second telescopic device 30 (in which case the steel pipe column 21 and the second telescopic device 30 are detachably connected). The above-mentioned bolts need to be removed before the steel pipe column 21 is laid down.

[0041] In some embodiments, the second telescopic device 30 and the trestle body 1 (in which case the second telescopic device 30 and the trestle body 1 are detachably connected) or the steel pipe column 21 and the second telescopic device 30 (in which case the steel pipe column 21 and the second telescopic device 30 are detachably connected) are configured as a detachable structure with a socket joint.

[0042] In the above embodiments, the first telescopic device 40 and / or the second telescopic device 30 are hydraulic jacks, and the first telescopic device 40 is a waterproof jack; when the second telescopic device 30 is fixedly installed on the lower end face of the trestle body 1, it can be an ordinary hydraulic jack; when the second telescopic device 30 is fixedly installed on the top of the steel pipe column 21, it should be a waterproof jack.

[0043] Reference Figure 1 and Figure 2 In this embodiment, two sets of steel pipe columns 21 are provided on the cast-in-place pile 20, and the side walls of each set of steel pipe columns 21 are connected to the crossbeam 201 through a set of first telescopic devices 40, so as to realize the independent adjustment of the two sets of steel pipe columns 21.

[0044] Reference Figure 4 Depending on the different spacing between the two sets of steel pipe columns 21, the two sets of steel pipe columns 21 can be placed on a straight line after being laid down. When the spacing is different, there can also be a certain angle. However, in general, the laying direction of the two sets of steel pipe columns 21 is biased towards the downstream direction of the flood flow.

[0045] Example 2:

[0046] This embodiment provides a flood control method for a steel trestle bridge that can withstand floods during the flood season, including the following steps:

[0047] S1. Retract the second telescopic device 30 to disengage the support column 2 from the trestle body 1. Before retracting the second telescopic device 30, if there are bolts connecting the support column 2 and the trestle body 1, the bolts need to be removed.

[0048] S2. The steel pipe column 21 is driven to be lowered to a horizontal state by the first telescopic device 40. During the process, the steel pipe column 21 is laid flat on the crossbeam 201, and the direction of the steel pipe column 21 being lowered is generally along the direction of the flood flow. At this time, the trestle bridge body 1 is suspended above the river channel by its own structural strength and cannot be passed by people or vehicles. After the flood recedes, the steel pipe column 21 is re-erected for support.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A steel trestle bridge capable of withstanding floods during the flood season, comprising a trestle body (1) spanning a river channel and at least one set of support columns (2) disposed within the river channel, wherein the upper ends of the at least one set of support columns (2) are supported on the trestle body (1), characterized in that, The support column (2) includes: A cast-in-place pile (20) includes a pile column (200) and a crossbeam (201) located at the upper end of the pile column (200). The upper end of the cast-in-place pile (20) is supported by at least one set of steel pipe columns (21). The lower end of the steel pipe column (21) is rotatably connected to the cast-in-place pile (20), and the axis of rotation is horizontal, so that the steel pipe column (21) has a vertical state and a horizontal state after being laid down. A first telescopic device (40), one end of which is hinged to the side wall of the steel pipe column (21) and the other end of which is hinged to the crossbeam (201), is used to drive the steel pipe column (21) to switch between a vertical and a horizontal state; and The second telescopic device (30) is supported between the top of the steel pipe column (21) and the lower end of the trestle body (1); one of the steel pipe column (21) and the trestle body is fixedly connected to the second telescopic device (30), and the other is detachably connected to the second telescopic device (30) so that the support column (2) can be separated from the trestle body (1) before the steel pipe column (21) is switched to a horizontal state.

2. The steel trestle bridge capable of withstanding floods during the flood season according to claim 1, characterized in that, The cast-in-place piles (20) are either a group pile or a single pile structure.

3. The steel trestle bridge capable of withstanding floods during the flood season according to claim 2, characterized in that, The cast-in-place pile (20) includes two sets of pile columns (200), and the crossbeam (201) is a ground beam connecting the tops of the two sets of pile columns (200).

4. The steel trestle bridge capable of withstanding floods during the flood season according to claim 1, characterized in that, The steel pipe column (21) and the cast-in-place pile (20) are connected by a hinge (50).

5. The steel trestle bridge capable of withstanding floods during the flood season according to claim 4, characterized in that, The hinge (50) includes two sets of stacked hinge pads (500) and a hinge pin (501) connecting the two sets of hinge pads (500) on the same side; both sets of hinge pads (500) and the hinge pin (501) are made of steel.

6. The steel trestle bridge capable of withstanding floods during the flood season according to any one of claims 1 to 5, characterized in that, The first telescopic device (40) and / or the second telescopic device (30) are hydraulic jacks.

7. The steel trestle bridge capable of withstanding floods during the flood season according to any one of claims 1 to 5, characterized in that, Two sets of steel pipe columns (21) are provided on the cast-in-place pile (20), and the side walls of the two sets of steel pipe columns (21) are each connected to the crossbeam (201) through a set of the first expansion joint (40).

8. The flood control method for a steel trestle bridge capable of withstanding flood season floods as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Retract the second telescopic device (30) to disengage the support column (2) from the trestle body (1); S2. The steel pipe column (21) is driven to be lowered to a horizontal state by the first telescopic device (40).

9. The flood control method according to claim 8, characterized in that, In step S2, the steel pipe column (21) is placed flat on the crossbeam (201).

10. The flood control method according to claim 8, characterized in that, In step S2, the steel pipe column (21) is laid down along the direction of the flood flow.

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