A single-column pier bridge reinforcement structure with adjustable additional support and construction method thereof

Abstract

The present invention provides an additional support with adjustable lateral position. Based on the additional support, a single-column pier bridge is reinforced. The bridge includes a beam body, a single-column pier and a cap. The reinforcement structure includes a perforated bottom plate, a horizontal perforated sliding plate, an L-shaped additional support, a steel diagonal brace, a slide groove structure, a baffle, a single rod and an anchor bolt. The single-column pier is surrounded by a perforated bottom plate, the perforated bottom plate is provided with a slide groove, a horizontal perforated sliding plate is installed in the slide groove, an L-shaped additional support is provided on the horizontal perforated sliding plate, and the L-shaped additional support is provided with a slide groove structure. A single rod is hingedly installed in each slide groove structure through a slider. The other ends of the four single rods located on one side of the L-shaped additional support converge and are connected to the perforated steel pipe. The single-column pier bridge reinforcement structure provided by the present invention provides effective additional support for the transverse outer edge of the beam body at the position of the single-column pier by arranging a steel diagonal brace and a baffle on the L-shaped additional support, significantly improving the lateral anti-rollover capacity of the existing single-column pier bridge, and the reinforcement effect is remarkable.

Description

Technical Field

[0001] The invention relates to the field of bridge maintenance and reinforcement, and in particular to a single-column pier bridge reinforcement structure with adjustable additional support and a construction method thereof. Background Art

[0002] Single-column pier bridges are widely used in urban viaducts and highway ramps. In recent years, with the continuous increase in traffic flow and vehicle load, accidents of single-column pier bridges overturning due to overloaded vehicles have occurred frequently, causing casualties and losses to personnel and property to varying degrees. It is very urgent to carry out anti-overturning reinforcement and transformation of existing single-column pier bridges to solve the anti-overturning safety problem of single-column pier bridges, which is of great significance for preventing bridge overturning accidents and ensuring the safe operation of bridges.

[0003] At present, single-point support is the main support method for single-column bridge piers, which is very unfavorable for the lateral anti-overturning of bridges. Under the eccentric load of vehicles, the upper structure box girder undergoes constrained torsional deformation around the point of action of the resultant force at the contact position between the box girder and the support. As the eccentric load increases, the point of action of the resultant force gradually moves toward the center line of the two end supports on the side of the overturning load. When it moves to the center line of the two end supports, the ultimate anti-overturning moment reaches the maximum. At this time, if the overturning moment cannot be balanced, the upper structure box girder will be completely overturned and damaged.

[0004] At present, the reinforcement methods of single-column pier bridges can be divided into the reinforcement and reconstruction of the upper structure, the reinforcement and reconstruction of the lower structure, the reconstruction of the support system, and the strengthening of the connection structure of the upper and lower structures. The existing reinforcement measures for single-column pier bridges are to add piers next to the original piers and add support structures to the lateral side of the upper structure beam body. However, this method has a long construction period and high construction costs. CN110644379A discloses a reinforcement structure that uses a sleeve reinforcement column and a steel cap beam sleeved at the end of the reinforcement column. The two ends of the steel cap beam extend in the lateral direction of the beam body, and two support devices are arranged on the steel cap beam to support the beam body. This reinforcement method requires the addition of a reinforcement column on the outside of the single-column pier, which increases the construction process for the reinforcement of the original single-column pier. The reinforcement construction technology is complex and the cost is high. The main problem of overturning of single-column pier bridges is the lack of support force on the lateral outer edge of the upper structure beam, which leads to the safety accident of beam tilting. Therefore, the focus of reinforcement of single-column pier bridges is to provide support for the lateral outer edge of the original upper structure beam, rather than to reinforce the original single-column pier column. Summary of the invention

[0005] In view of the defects existing in the prior art and in order to effectively solve the safety problem that the existing single-column pier bridges are prone to tilting, the present invention provides a single-column pier bridge reinforcement structure with adjustable additional support and a construction method thereof.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A reinforcement structure for a single-column pier bridge with adjustable additional support, the bridge comprising a beam body, a single-column pier supporting the beam body and a pedestal supporting the single-column pier, the reinforcement structure comprising a perforated bottom plate, a horizontal perforated sliding plate, an L-shaped additional support, a steel diagonal brace, a slide groove structure, a baffle, a single rod and an anchor bolt; the perforated bottom plate is arranged around the single-column pier, the perforated bottom plate is provided with a slide groove along the transverse direction of the beam body, the horizontal perforated sliding plate is installed in the slide groove, and is fixed to the pedestal together with the perforated bottom plate through the anchor bolt; the horizontal perforated sliding plate is provided with The L-shaped additional support comprises a vertical plate and a horizontal plate, the steel diagonal brace is arranged between the horizontal plate and the vertical plate, the two L-shaped additional supports sandwich the single column pier in the middle, and the horizontal plate supports are arranged on both sides of the bottom of the beam body, and the baffle is vertically arranged at the end of the horizontal plate of the L-shaped additional support; the vertical plate of the L-shaped additional support is provided with a slide groove structure at both ends of the two side surfaces along the direction of the beam body, and the single rod is hingedly installed in each slide groove structure through a slider, and the other ends of the four single rods located on one side of the L-shaped additional support converge and are connected to the perforated steel pipe;

[0008] The perforated bottom plate comprises a left perforated bottom plate and a right perforated bottom plate symmetrically located around the single column pier, and the left perforated bottom plate and the right perforated bottom plate are symmetrical in structure;

[0009] The horizontal opening sliding plate comprises a symmetrically arranged horizontal opening left sliding plate and a horizontal opening right sliding plate, and the horizontal opening left sliding plate and the horizontal opening right sliding plate are symmetrical in structure.

[0010] Furthermore, the anchor bolts may be high-strength anchor bolts, expansion bolts or chemical bolts.

[0011] Furthermore, the slide groove structure includes a slide groove arranged on the side of the L-shaped additional support, a sliding block is provided in the slide groove, the sliding block is hinged to one end of the single rod through a pin, and the other end of the single rod is connected to the perforated steel pipe through a thread and a nut.

[0012] Furthermore, the L-shaped additional support includes a symmetrically arranged left L-shaped additional support and a right L-shaped additional support, the left L-shaped additional support and the right L-shaped additional support are symmetrical in structure, the left L-shaped additional support is vertically fixed to the horizontal opening left sliding plate, and the right L-shaped additional support is vertically fixed to the horizontal opening right sliding plate.

[0013] Furthermore, the baffle includes a left baffle and a right baffle that are symmetrically arranged, the left baffle is vertically fixed to the left L-shaped additional support, and the right baffle is vertically fixed to the right L-shaped additional support.

[0014] Furthermore, there are four steel diagonal braces, including a left steel diagonal brace and a right steel diagonal brace. The left steel diagonal brace is fixedly connected to the left L-shaped additional support, and the right steel diagonal brace is fixedly connected to the right L-shaped additional support.

[0015] The present invention also provides a construction method for the above-mentioned single-column pier bridge reinforcement structure with adjustable additional support, which specifically comprises the following steps:

[0016] S1, fixing and installing the perforated bottom plate, installing the perforated bottom plate on both sides of the single-column pier along the transverse direction of the beam body and welding and fixing, opening holes at positions corresponding to the openings of the perforated bottom plate on the cap and installing the anchor bolts, and fixing the perforated bottom plate to the cap through the anchor bolts;

[0017] S2, installing the L-shaped additional support, inserting the horizontal hole sliding plate into the sliding groove of the hole bottom plate, adjusting the distance between the two L-shaped additional supports so that the two L-shaped additional supports sandwich the single column pier in the middle, and the cross plates thereof are supported on both sides of the bottom of the beam body;

[0018] S3, installing the single rod, hinge one end of the single rod in the slide structure through a slider, and connect the other end to the perforated steel pipe;

[0019] S4, fix and install the baffle and the steel diagonal brace, set up a temporary bracket, weld the baffle at the end of the horizontal plate of the L-shaped additional support close to the beam body, and weld the steel diagonal brace between the vertical plate and the horizontal plate of the L-shaped additional support;

[0020] S5. Fix the L-shaped additional support, and adjust the distance between the two L-shaped additional supports again, so that the baffle and the L-shaped additional support tightly wrap the bottom of the beam body, and fix the L-shaped additional support to the base through the anchor bolt.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] By setting steel diagonal braces and baffles on the L-shaped additional support, a new reinforcement device is formed to provide effective additional support for the transverse outer edge of the beam body at the position of the single-column pier, significantly improving the transverse anti-rollover capacity of the existing single-column pier bridge, effectively solving the safety problem of the existing single-column pier bridge prone to rollover, effectively extending the service life of the bridge, and the reinforcement effect is significant;

[0023] By creatively proposing an open bottom plate with a slide groove, the lateral position of the L-shaped additional support can be adjusted, which significantly improves the applicability of the reinforcement device. It is easy to adjust and can be applied to reinforced beams of different lateral sizes, significantly improving the adaptability of the reinforcement device to the reinforcement of single-column pier bridges of different lateral sizes.

[0024] The L-shaped additional support is fixed and connected in the horizontal direction by multiple bolts on both sides of the perforated bottom plate, which effectively improves the stability and anti-overturning capacity of the connection between the L-shaped additional support and the cap. At the same time, it protects the original single-column pier structure and avoids the development of concrete cracks and steel corrosion at the connection between the single pier column and the cap.

[0025] By creatively proposing a chute structure and a cross single rod arrangement, the L-shaped additional supports on both sides are connected and integrated in the two side surfaces, which not only supports the L-shaped additional supports but also prevents the in-plane buckling of the L-shaped additional supports; at the same time, the chute structure and the cross single rod arrangement are adjustable. As long as the lateral distance between the two L-shaped additional supports is determined, a cross single rod connection structure can be formed by adjusting the chute and the single rod, which significantly improves the stability of the L-shaped additional supports;

[0026] Except for drilling holes in the bridge cap, all components of the reinforcement structure are prefabricated in the factory in advance. According to the reinforcement construction method provided by the present invention, the single-column pier bridge can be quickly reinforced, the on-site installation of the reinforcement components is convenient, the reinforcement construction speed is fast, and the reinforcement construction efficiency is high;

[0027] The reinforced structure can be repaired quickly, and local components are replaceable. When some local components are damaged, they can be quickly replaced. The repair speed is fast, and the replaced components can be recycled, which effectively saves resources and is conducive to the widespread promotion and application of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0029] Figure 2 A side schematic diagram of an embodiment of the present invention;

[0030] Figure 3 This is an overall schematic diagram of the use state of the reinforcement structure of an embodiment of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0033] Figure 6 It is a partial schematic diagram of the perforated bottom plate and the sliding plate in the embodiment of the present invention;

[0034] Figure 7 It is a partial schematic diagram of the slide groove structure and the single rod connection in the embodiment of the present invention;

[0035] Figure 8 Schematic diagram of the connection between a single rod and a perforated steel pipe in an embodiment of the present invention;

[0036] Explanation of the reference numerals: 1 is a perforated bottom plate, 1-1 is a left perforated bottom plate, 1-2 is a right perforated bottom plate, 2 is a horizontal perforated sliding plate, 2-1 is a horizontal perforated left sliding plate, 2-2 is a horizontal perforated right sliding plate, 3 is a cap, 4 is a single column pier, 5 is a beam, 6 is an L-shaped additional support, 6-1 is a left L-shaped additional support, 6-2 is a right L-shaped additional support, 7 is a steel diagonal brace, 7-1 is a left steel diagonal brace, 7-2 is a right steel diagonal brace, 8 is a slide structure, 9 is a baffle, 9-1 is a left baffle, 9-2 is a right baffle, 10 is a single rod, 101 is a pin shaft, 12 is a nut, 13 is a perforated steel pipe, and 14 is an anchor bolt. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, a reinforcement structure of a single-column pier bridge with adjustable additional support, the bridge includes a beam body 5, a single-column pier 4 supporting the beam body 5 and a pedestal 3 supporting the single-column pier 4, the reinforcement structure includes a perforated bottom plate 1, a horizontal perforated sliding plate 2, an L-shaped additional support 6, a steel diagonal brace 7, a slide groove structure 8, a baffle 9, a single rod 10 and the anchor bolt 14; the perforated bottom plate 1 is arranged around the single-column pier 4, the perforated bottom plate 1 is provided with a slide groove along the transverse direction of the beam body 5, the horizontal perforated sliding plate 2 is installed in the slide groove, and is fixed to the pedestal 3 together with the perforated bottom plate 1 through the anchor bolt 14; the horizontal perforated sliding plate 2 is provided with the L-shaped additional support 6, the L-shaped additional support 6 includes a vertical plate and a horizontal plate, the steel diagonal brace 7 is provided between the horizontal plate and the vertical plate, the two L-shaped additional supports 6 sandwich the single column pier 4 in the middle, and its horizontal plate supports the two sides of the bottom of the beam body 5, and the baffle 9 is vertically provided at the end of the horizontal plate of the L-shaped additional support 6; the vertical plate of the L-shaped additional support 6 is provided with a slide groove structure 8 at both ends of the two side surfaces along the direction of the beam body 5, and the single rod 10 is hingedly installed in each of the slide groove structures 8 through a slider, and the other ends of the four single rods 10 located on one side of the L-shaped additional support 6 converge and are connected to the perforated steel pipe 13.

[0039] like Figure 1As shown, the perforated bottom plate 1 includes a left perforated bottom plate 1-1 and a right perforated bottom plate 1-2 symmetrically located around the single column pier 4, and the left perforated bottom plate 1-1 and the right perforated bottom plate 1-2 are symmetrical in structure.

[0040] like Figure 6 As shown, the horizontal opening sliding plate 2 includes a symmetrically arranged horizontal opening left sliding plate 2-1 and a horizontal opening right sliding plate 2-2, and the horizontal opening left sliding plate 2-1 and the horizontal opening right sliding plate 2-2 are symmetrical in structure.

[0041] like Figure 4 and Figure 5 As shown, the anchor bolt 14 can be a high-strength anchor bolt, an expansion bolt or a chemical bolt.

[0042] like Figure 7 As shown, the slide groove structure 8 includes a slide groove arranged on the side of the L-shaped additional support 6, and a slider is provided in the slide groove. The slider is hinged to one end of the single rod 10 through a pin 101, and the other end of the single rod 10 is connected to the perforated steel pipe 13 through a thread and a nut 12.

[0043] like Figure 1 and Figure 3 As shown, the L-shaped additional support 6 includes a symmetrically arranged left L-shaped additional support 6-1 and a right L-shaped additional support 6-2, and the left L-shaped additional support 6-1 and the right L-shaped additional support 6-2 are symmetrical in structure. The left L-shaped additional support 6-1 is vertically fixed to the horizontal opening left sliding plate 2-1, and the right L-shaped additional support 6-2 is vertically fixed to the horizontal opening right sliding plate 2-2.

[0044] like Figure 3 As shown, the baffle 9 includes a left baffle 9-1 and a right baffle 9-2 which are symmetrically arranged. The left baffle 9-1 is vertically fixed to the left L-shaped additional support 6-1, and the right baffle 9-2 is vertically fixed to the right L-shaped additional support 6-2.

[0045] like Figure 1 and Figure 3 As shown, there are four steel diagonal braces 7, including a left steel diagonal brace 7-1 and a right steel diagonal brace 7-2. The left steel diagonal brace 7-1 is fixedly connected to the left L-shaped additional support 6-1, and the right steel diagonal brace 7-2 is fixedly connected to the right L-shaped additional support 6-2.

[0046] Implementation Methods

[0047] The construction method of the above-mentioned single-column pier bridge reinforcement structure with adjustable additional support specifically comprises the following steps:

[0048] S1, fix and install the perforated bottom plate 1, install the perforated bottom plate 1 on both sides of the single column pier 4 along the transverse direction of the beam body 5 and weld and fix them, open holes at positions corresponding to the openings of the perforated bottom plate 1 on the cap 3 and install the anchor bolts 14, and fix the perforated bottom plate 1 to the cap 3 through the anchor bolts 14;

[0049] S2, install the L-shaped additional support 6, insert the horizontal hole sliding plate 2 into the sliding groove of the hole bottom plate 1, adjust the distance between the two L-shaped additional supports 6, so that the two L-shaped additional supports 6 sandwich the single column pier 4 in the middle, and the cross plate support is on both sides of the bottom of the beam body 5;

[0050] S3, installing the single rod 10, hinge one end of the single rod 10 in the slide structure 8 through a slider, and connect the other end to the perforated steel pipe 13;

[0051] S4, fix and install the baffle plate 9 and the steel diagonal brace 7, set up a temporary bracket, weld the baffle plate 9 at the end of the horizontal plate of the L-shaped additional support 6 close to the beam body 5, and weld the steel diagonal brace 7 between the vertical plate and the horizontal plate of the L-shaped additional support 6;

[0052] S5. Fix the L-shaped additional support 6, and adjust the distance between the two L-shaped additional supports 6 again, so that the baffle 9 and the L-shaped additional support 6 tightly wrap the bottom of the beam body 5, and fix the L-shaped additional support 6 to the base 3 through the anchor bolt 14.

[0053] The embodiments are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A single-column pier bridge reinforcement structure with adjustable additional support, the bridge comprising a beam body (5), a single-column pier (4) supporting the beam body (5), and a cap (3) supporting the single-column pier (4), characterized in that: The invention comprises a perforated bottom plate (1), a horizontal perforated sliding plate (2), an L-shaped additional support (6), a steel diagonal brace (7), a slide groove structure (8), a baffle (9), a single rod (10) and an anchor bolt (14); the perforated bottom plate (1) is arranged around the single column pier (4); the perforated bottom plate (1) is provided with a slide groove along the transverse direction of the beam body (5); the horizontal perforated sliding plate (2) is installed in the slide groove and is fixed to the pedestal (3) together with the perforated bottom plate (1) through the anchor bolt (14); the L-shaped additional support (6) is arranged on the horizontal perforated sliding plate (2); the L-shaped additional support (6) comprises a vertical plate and a transverse plate, wherein the steel diagonal brace (7) is provided between the transverse plate and the vertical plate, the two L-shaped additional supports (6) sandwich the single column pier (4) in the middle, and the transverse plate support thereof is provided on both sides of the bottom of the beam body (5), and the baffle (9) is vertically provided at the end of the transverse plate of the L-shaped additional support (6); the vertical plate of the L-shaped additional support (6) is provided with a slide groove structure (8) at both ends of the two side surfaces along the direction of the beam body (5), and each of the slide groove structures (8) is hingedly installed with a single rod (10) through a slider, and the other ends of the four single rods (10) located on one side of the L-shaped additional support (6) converge and are connected to the perforated steel pipe (13); The perforated bottom plate (1) comprises a left perforated bottom plate (1-1) and a right perforated bottom plate (1-2) symmetrically located around the single column pier (4), and the left perforated bottom plate (1-1) and the right perforated bottom plate (1-2) are symmetrical in structure; The horizontal opening sliding plate (2) comprises a symmetrically arranged horizontal opening left sliding plate (2-1) and a horizontal opening right sliding plate (2-2); the horizontal opening left sliding plate (2-1) and the horizontal opening right sliding plate (2-2) are symmetrical in structure.

2. The single-column pier bridge reinforcement structure with adjustable additional support according to claim 1, characterized in that: The anchor bolt (14) may be a high-strength anchor bolt, an expansion bolt or a chemical bolt.

3. The single-column pier bridge reinforcement structure with adjustable additional support according to claim 1, characterized in that: The slide groove structure (8) comprises a slide groove arranged on the side of the L-shaped additional support (6), a slider is arranged in the slide groove, the slider is hinged to one end of the single rod (10) via a pin (101), and the other end of the single rod (10) is connected to the perforated steel pipe (13) via a thread and a nut (12).

4. The single-column pier bridge reinforcement structure with adjustable additional support according to claim 1, characterized in that: The L-shaped additional support (6) comprises a left L-shaped additional support (6-1) and a right L-shaped additional support (6-2) which are symmetrically arranged. The left L-shaped additional support (6-1) and the right L-shaped additional support (6-2) are symmetrical in structure. The left L-shaped additional support (6-1) is vertically fixed to the horizontal opening left sliding plate (2-1), and the right L-shaped additional support (6-2) is vertically fixed to the horizontal opening right sliding plate (2-2).

5. The single-column pier bridge reinforcement structure with adjustable additional support according to claim 4, characterized in that: The baffle plate (9) comprises a left baffle plate (9-1) and a right baffle plate (9-2) which are symmetrically arranged, the left baffle plate (9-1) being vertically fixed to the left L-shaped additional support (6-1), and the right baffle plate (9-2) being vertically fixed to the right L-shaped additional support (6-2).

6. The single-column pier bridge reinforcement structure with adjustable additional support according to claim 4, characterized in that: There are four steel diagonal braces (7) in total, including a left steel diagonal brace (7-1) and a right steel diagonal brace (7-2); the left steel diagonal brace (7-1) is fixedly connected to the left L-shaped additional support (6-1), and the right steel diagonal brace (7-2) is fixedly connected to the right L-shaped additional support (6-2).

7. A construction method for a single-column pier bridge reinforcement structure with adjustable additional support according to any one of claims 1 to 6, characterized in that: The specific steps include: S1, fixing and installing the perforated bottom plate (1), installing the perforated bottom plate (1) on both sides of the single-column pier (4) along the transverse direction of the beam body (5) and welding and fixing them, opening holes at positions corresponding to the openings of the perforated bottom plate (1) on the pedestal (3) and installing the anchor bolts (14), and fixing the perforated bottom plate (1) to the pedestal (3) via the anchor bolts (14); S2, installing the L-shaped additional support (6), inserting the horizontal opening sliding plate (2) into the sliding groove of the opening bottom plate (1), and adjusting the distance between the two L-shaped additional supports (6) so that the two L-shaped additional supports (6) sandwich the single column pier (4) in the middle, and the cross plate support thereof is on both sides of the bottom of the beam body (5); S3, installing the single rod (10), hinge-mounting one end of the single rod (10) in the slide groove structure (8) via a slider, and connecting the other end of the single rod (10) to the perforated steel pipe (13); S4, fixing and installing the baffle plate (9) and the steel diagonal brace (7), setting up a temporary bracket, welding the baffle plate (9) at the end of the transverse plate of the L-shaped additional support (6) close to the beam body (5), and welding the steel diagonal brace (7) between the vertical plate and the transverse plate of the L-shaped additional support (6); S5, fix the L-shaped additional support (6), adjust the distance between the two L-shaped additional supports (6) again, so that the baffle (9) and the L-shaped additional support (6) tightly wrap the bottom of the beam body (5), and fix the L-shaped additional support (6) to the base (3) through the anchor bolt (14).

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