CN204151701U - Single column pier bridge adds steel structure support overturning or slip resistance analysis bracing means - Google Patents

Abstract

The utility model discloses an additional steel structure supporting anti-overturning reinforcement device for a single-column pier bridge, which comprises a steel structure corbel and a support jacking device; The single-column piers are connected to form a pole beam, on which the support jacking device and bridge support are installed. The steel structure corbel is welded and combined by steel plates, which can be manufactured and installed on site, which can ensure the quality and precision of the production. The steel structure corbel and the single-column pier are connected by chemical anchor bolts. The construction process does not require formwork, and simple scaffolding can Construction is possible without affecting normal traffic. The support lifting device is easy to install, eliminating the cumbersome process of jacking up the beam body to install the bridge support, and the bridge support can be installed in place with a wrench.

Description

Additional steel structure support anti-overturning reinforcement device for single column pier bridge

technical field

The utility model relates to a bridge reinforcement device, in particular to a reinforcement device capable of preventing single-pillar pier bridges from overturning.

Background technique

Single column pier bridges are widely used in interchanges because of their small clearance under the bridge, simple and smooth appearance, and light and beautiful appearance. However, due to the poor anti-overturning performance of the structure itself, single column pier bridges may occur The overall lateral instability caused the beam body to overturn. There have been many overturning accidents of bridges with single-pillar piers during their use, resulting in casualties and economic losses. In order to take remedial measures, a large number of bridges with single-pillar piers have been reinforced against overturning in the past two years.

In order to ensure the structural safety of existing single-pillar pier bridges, effective measures should be taken to eliminate the potential safety hazards of single-pillar pier structure overturning. There are two common methods: one is to change the single-column pier into a wall-type solid pier, then lift the beam body, and install an additional support on both sides of the original support to achieve the anti-overturning effect; the second is Transform the single-column pier into a three-column pier, jack up the beam body, and install additional supports on the new pier columns. Both of the above two methods require vertical casting of concrete, and even piling. The construction process is complicated, the construction time is long, and it is limited by the clearance under the bridge. Especially in the case of oblique intersection, it is almost impossible to change to a three-column pier. In addition, the additional support needs to be installed in place by beam jacking process, and the traffic needs to be interrupted during the construction process, which makes the anti-overturning reinforcement of existing single-pillar bridges complicated and easily limited by the scope of application.

Contents of the invention

In order to overcome the disadvantage that existing single-pillar bridges are prone to overturning under the action of overload and eccentric loads, the utility model provides an additional steel structure support anti-overturning reinforcement device for single-pillar bridges. The overturning moment, and the structure is simple, the installation is convenient, and the construction process does not affect the normal traffic.

In order to solve the problems of the technologies described above, the utility model adopts the following technical solutions:

An additional steel structure support anti-overturning reinforcement device for a single-column pier bridge, characterized in that: the reinforcement device includes a steel structure corbel 1 and a support jacking device 2; the steel structure corbel 1 is added on both sides of the single-column pier, And through the chemical anchor bolt 9 is connected with the single-column pier to form a pole beam, on which the support jacking device 2 and the bridge support 3 are installed.

As a preference, the steel structure corbel 1 is welded and combined by corbel web 4, corbel flange plate 5 and corbel stiffener 6, chemical anchor holes 8 are opened on the corbel web 4, the steel structure The corbel 1 is fixed on the single-column pier through chemical anchor bolts 9, and the corbel connecting plate 7 connects the steel structure corbels 1 on both sides into a whole. .

The support jacking device is composed of a support plate, a wedge block device and a wedge support rib plate. By turning the adjusting bolt, the position of the wedge block can be adjusted, and then the support plate is lifted to lift the bridge support.

The support plate is composed of the support plate 10 and the wedge-shaped rib 11 at the bottom of the support plate, and the two are connected by welding. When the bridge support 3 is lifted, the seat plate baffle 14 will limit the horizontal displacement of the support plate. The bearing plate can only move vertically, and the bridge bearing 3 will not produce shear deformation during the construction process.

The wedge block device is composed of a wedge block, an adjusting bolt 16 and a seat plate baffle 14; the wedge block is a lattice structure, and is composed of a wedge rib 12, a wedge plate limit block 13 and a wedge stiffener 15 welded, and the wedge shape The plate limit block 13 is welded on the inner side of the wedge-shaped rib 12, and the length is slightly shorter than the net distance between the wedge-shaped ribs 12; the adjustment bolt 16 is welded on the side of the wedge-shaped block, and the seat plate baffle 14 is welded on the end of the steel structure corbel 1.

The wedge supporting ribs 17 are welded to the top of the steel structure corbel 1 for supporting the wedge and playing a position-limiting role.

Concrete is poured between the four corbel webs on both sides of the single-column pier, forming a complete anti-overturning force system with the steel structure corbel 1.

In the utility model, a steel structure support is arranged at the bottom of the beam of the single-pillar pier bridge in the transverse direction to resist the overturning moment caused by the eccentric load. The specific measures are as follows: Add steel structure corbels on both sides of the single-column pier in the direction of the bridge, the steel structure corbels and the single-column pier are connected by chemical anchor bolts to form a pole beam, and the support jacking device and bridge support are installed on it Concrete should be poured between the webs of the corbels on both sides to increase the rigidity of the corbels of the steel structure and form a complete anti-overturning force system; finally, the bridge support is installed in place by the support lifting device.

The key point of the utility model is the jacking device of the support, and the main principle is to convert the horizontal pulling force of the screw rod into the vertical jacking force through the wedge block. The horizontal pulling force of the screw is converted from the torque applied by the adjusting bolt, and then the horizontal pulling force of the screw is cleverly converted into a vertical lifting force through the wedge block, and the installation of the additional support of the bridge can be completed with an ordinary wrench. The bearing pressure is controlled by the compression of the rubber bearing.

The beneficial effect of the utility model is that the single-pillar pier bridge can be reinforced against overturning without affecting the normal traffic, and it is a single-pillar pier bridge anti-overturning reinforcement with simple structure, convenient installation, and the construction process is not limited by the scope of application. Overturning reinforcement. All parts of the device can be prefabricated in the factory, which not only ensures the quality and precision of the product, but also greatly reduces the construction time on site. Since the additional support is a steel structure, both the corbel web and the corbel flange plate of the steel structure corbel can be used as a formwork for pouring concrete, so there is no need to set up an additional formwork to pour concrete, and only simple scaffolding can be used for construction. The installation of the bridge support adopts the wedge-shaped block lifting installation process. The conversion from torque to vertical lifting force is completed through the wedge-shaped block device. The seat is installed in place.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the top view of I-I of Fig. 1 of the utility model;

Fig. 3 is the elevation view of the utility model steel structure corbel;

Fig. 4 is a top view of the steel structure corbel shown in Fig. 3 of the utility model;

Fig. 5 is a side view of the steel structure corbel shown in Fig. 3 of the utility model;

Fig. 6 is a schematic diagram of the relative relationship of the support jacking device of the present invention;

Fig. 7 is a schematic diagram of the utility model bearing plate;

Fig. 8 is a bottom view of the structure shown in Fig. 7 of the utility model;

Fig. 9 is a schematic diagram of a wedge block device of the present invention;

Fig. 10 is a top view of the structure shown in Fig. 9 of the utility model;

Fig. 11 is a structural schematic diagram of a wedge-shaped block supporting rib plate of the present invention;

Fig. 12 is a top view of the structure shown in Fig. 11 of the utility model;

In the figure: 1. Steel structure corbel, 2. Support jacking device, 3. Bridge support, 4. Corbel web, 5. Corbel flange plate, 6. Corbel stiffener, 7. Corbel Contact plate, 8, chemical anchor bolt hole, 9, chemical anchor bolt, 10, support backing plate, 11, backing plate bottom wedge-shaped rib, 12, wedge-shaped rib, 13, wedge-shaped plate limit block, 14, seat plate baffle , 15, wedge-shaped block stiffeners, 16, adjusting bolts, 17, wedge-shaped block support ribs.

Detailed ways

The technical solutions of the present utility model will be further described below through specific embodiments and in conjunction with the accompanying drawings.

Embodiment: As shown in Figure 1-12, the additional steel structure support anti-overturning reinforcement device for a single-column pier bridge, as long as it includes a steel structure corbel 1 and a support jacking device 2; side, and through the chemical anchor bolt 9 connected with the single-column pier to form a pole beam, on which the support jacking device 2 and the bridge support 3 are installed.

The whole structure can be divided into two parts, the first part is the steel structure corbel 1, and the second part is the support jacking device 2. The steel structure corbel 1 is welded and combined by corbel web 4, corbel flange plate 5 and corbel stiffener 6. The corbel web 4 is provided with chemical anchor holes 8, and the steel structure is fixed by using chemical anchor bolts 9. The corbel 1 is fixed on the pier column, and then the steel structure corbels 1 on both sides are connected into a whole by the corbel connecting plate 7 .

The relative position of each part of the support jacking device is shown in Figure 6, which consists of three parts: the support plate, the wedge block device and the wedge block support rib. The bearing plate is composed of the bearing backing plate 10 and the wedge-shaped rib 11 at the bottom of the backing plate. The wedge block device is made up of wedge block, adjusting bolt 16 and seat plate baffle plate 14, and wherein wedge block is lattice type structure, is formed by welding of wedge-shaped rib 12, wedge-shaped plate limit block 13 and wedge-shaped block stiffener 15; The bit block 13 is welded on the inner side of the wedge-shaped rib 12, and the length is slightly shorter than the net distance between the wedge-shaped ribs 11. The main function is to limit the lateral displacement between the wedge-shaped block and the support plate when the wedge-shaped block slides; the wedge-shaped block stiffener 15 is welded to the wedge-shaped rib Between 12 and the wedge-shaped plate limit block 13, it is used to strengthen the rigidity of the wedge-shaped device; the adjustment bolt 16 is welded to the side of the wedge-shaped plate limit block 13, and its main function is to convert the torque into a horizontal pull to the screw rod through a wrench; The plate 14 is welded to the end of the steel structure corbel 1, and its main function is to limit the horizontal displacement of the support plate, only allowing its vertical displacement; the wedge support rib 17 is welded to the top of the steel structure corbel 1 to support the wedge And play a limiting role.

Implementation steps:

(1) Factory prefabricated steel structure corbels;

(2) Set up scaffolding on site and drill holes on the single-column pier;

(3) Install the steel structure corbel and weld the corbel connecting plate;

(4) Welding wedge support ribs and seat baffles;

(5) Assemble the support jacking device;

(5) Pouring concrete between the corbel webs;

(6) After the concrete reaches the predetermined strength, place the bridge support on the support plate, and turn the adjusting bolt to lift the support;

The above-mentioned embodiment is only a preferred solution of the utility model, and does not limit the utility model in any form, and there are other variations and modifications under the premise of not exceeding the technical solution described in the claims.

Claims (7)

1. Single column pier bridge adds a steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: described bracing means comprises steel work bracket (1) and bearing lift-up device (2); Steel work bracket (1) is set up in Single column pier both sides, and is connected to form shoulder pole girder, erection support lift-up device (2) and bridge pad (3) on it by chemical anchor bolts (9) and Single column pier.

2. Single column pier bridge according to claim 1 adds steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: described steel work bracket (1) is welded by bracket web (4), bracket frange plate (5) and bracket stiffening rib (6) and combines, bracket web (4) has chemical anchors keyhole (8), steel work bracket (1) is fixed on Single column pier by chemical anchor bolts (9), and both sides steel work bracket (1) are connected into entirety by bracket contact plate (7).

3. Single column pier bridge according to claim 1 adds steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: described bearing lift-up device (2) supports floor (17) by support plate, wedge device and wedge and forms.

4. Single column pier bridge according to claim 1 adds steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: described support plate is welded to form by wedge ribs (11) at the bottom of holder base plate (10) and backing plate.

5. Single column pier bridge according to claim 1 adds steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: described wedge device is made up of wedge, adjusting bolt (16) and seat board baffle plate (14); Wedge is cancelled structure, be welded to form by wedge ribs (12), clapboard limited block (13) and wedge stiffening rib (15), clapboard limited block (13) is welded on wedge ribs (12) inner side, and length is slightly shorter than the clear spacing between wedge ribs (12); Adjusting bolt (16) is welded on wedge side, and seat board baffle plate (14) is welded on steel work bracket (1) end.

6. Single column pier bridge according to claim 1 adds steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: described wedge supports floor (17) and is welded in steel work bracket (1) top.

7. Single column pier bridge according to claim 1 adds steel structure support overturning or slip resistance analysis bracing means, it is characterized in that: built concrete between the bracket web (4) of Single column pier both sides, formed complete overturning or slip resistance analysis stress system with steel work bracket (1).