Bridge gravity center adjusting structure

Abstract

The utility model discloses a bridge gravity center adjusting structure, including the bridge center line both sides setting of having been casted beam section part, cantilever pending casted sub beam section part, the beam section part on evenly be equipped with a plurality of heavy compression module, be equipped with the restriction cavity for placing water bag on every heavy compression module, wherein, when the cantilever pending casted sub beam section part distance bridge center line is unceasingly widened and is casted, through the position and weight of water bag, realize bridge gravity center accurate regulation. The application is through the layout multiple heavy compression module and corresponding water bag design, in order to be convenient for through the position and weight actual situation of water bag adjustment, through the position of water bag and the injection amount of water of adjustment, realize the adjustment of the pre -stress of bridge deck slab, to adapt to different load conditions and temperature change, pre -stress water bag can pressurize and make bridge deck slab stress even, avoid partial stress too big and lead to bridge deck slab rupture or damage, realize bridge gravity center accurate regulation.

Description

Technical Field

[0001] This utility model relates to the field of bridge structure technology, specifically to a bridge center of gravity adjustment structure. Background Technology

[0002] During bridge construction, especially for long-span prestressed concrete bridges, factors such as concrete shrinkage and creep, and prestressing tension often lead to a shift in the bridge's center of gravity, affecting structural safety and stability. Traditional adjustment methods often employ temporary supports or counterweights, which have the following drawbacks:

[0003] 1. Low adjustment accuracy: Temporary surcharges make it difficult to achieve precise control of the center of gravity;

[0004] Second, the construction period is long: the counterweight needs to be repeatedly hoisted, which affects the construction period.

[0005] Third, poor safety: the load is prone to slippage and there is a risk of falling.

[0006] Fourth, poor adaptability: It is impossible to dynamically adjust the counterweight scheme according to the type of bridge.

[0007] Therefore, this utility model proposes an integrated and modular bridge center of gravity adjustment structure to address the shortcomings of existing technologies. Utility Model Content

[0008] The purpose of this invention is to provide a bridge center of gravity adjustment structure to solve the problem of poor performance in existing bridge center of gravity adjustment technologies.

[0009] The objective of this utility model can be achieved through the following technical solutions:

[0010] A bridge center of gravity adjustment structure includes a cast-in-place beam segment and a cantilever beam segment to be cast, located on both sides of the bridge centerline. The cast-in-place beam segment is provided with a plurality of counterweight modules, and each counterweight module is provided with a limiting cavity for placing a water bag.

[0011] As the distance between the cantilevered beam segment to be poured and the bridge centerline is continuously widened during pouring, the position and weight of the water bag are used to precisely adjust the bridge's center of gravity.

[0012] As a further embodiment of this utility model: the counterweight module is a rectangular frame-shaped modular structure, which includes two distribution beams in the width direction and two distribution beams in the length direction, and the distribution beams are welded together end to end.

[0013] As a further embodiment of this utility model, the rectangular center of gravity of each of the weight-bearing modules is set at the same distance from the center line of the bridge.

[0014] As a further embodiment of this utility model: the bottom ends of the first distribution beam and the second distribution beam are respectively welded to the bridge deck, and the side walls of the first distribution beam and the second distribution beam are reinforced and welded to the bridge deck through multiple stiffening plates.

[0015] As a further embodiment of this utility model: the stiffening plate is a right-angled trapezoidal steel plate, and the bottom end of the stiffening plate is provided with a right-angled notch for avoiding welding of the first or second distribution beam.

[0016] As a further embodiment of this utility model: the first distribution beam and the second distribution beam are I-shaped beams, the ratio of the web height to the main beam height of the bridge is 1:3, the flange width is not less than 300mm, and the surface is coated with an anti-corrosion coating.

[0017] As a further embodiment of this utility model: the welding strength between the first distribution beam, the second distribution beam, the stiffening plate, and the bridge deck all meet the shear strength requirements of Q235B steel.

[0018] As a further embodiment of this utility model, the bridge center of gravity adjustment structure is applicable to prestressed concrete bridges with spans of 30m to 100m.

[0019] As a further embodiment of this invention: the bottom of the limiting cavity is provided with a drain hole for quickly draining the water from the water bag.

[0020] As a further aspect of this invention, it also includes a monitoring system for real-time monitoring of the bridge's center of gravity and feedback for adjusting the water bag counterweight.

[0021] The beneficial effects of this utility model are:

[0022] (1) This application arranges multiple counterweight modules and corresponding water bag designs to facilitate adjustment based on the actual position and weight of the water bags. By adjusting the water injection volume and the position of the water bags, the pre-pressure of the bridge deck can be adjusted to adapt to different load conditions and temperature changes. The pre-pressure water bags can increase pressure to make the bridge deck bear force evenly, avoid excessive local stress that could cause the bridge deck to crack or be damaged, and achieve precise adjustment of the bridge's center of gravity.

[0023] (2) The counterweight module in this application is designed with a modular structure and can be prefabricated in advance. After the prefabrication is completed, the counterweight module is hoisted onto the cast beam section for installation. The operation is convenient and the installation strength is high. The rectangular frame-shaped confinement cavity can prevent the water bag from slipping and improve safety.

[0024] (3) This application is applicable to bridges of various spans, has strong adaptability, and has a wide range of operational applications;

[0025] (4) This application monitors the position of the bridge's center of gravity in real time and provides feedback to adjust the water bag counterweight, so as to dynamically adjust the counterweight scheme according to the bridge type, thereby further improving the accuracy of the center of gravity adjustment control. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the cross-section of the counterweight of this utility model;

[0029] Figure 3 This is a schematic diagram of the counterweight module structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the stiffener structure of this utility model.

[0031] In the diagram: 100, cast-in-place beam segment; 200, cantilever beam segment to be cast; 300, counterweight module; 310, confinement cavity; 320, distribution beam one; 330, distribution beam two; 340, stiffening plate; 341, right-angle notch. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model; in the description of this utility model, "a plurality of" or "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] Please see Figure 1 and Figure 2As shown, this utility model is a bridge center of gravity adjustment structure, including a cast-in-place beam segment 100 and a cantilever beam segment 200 to be cast, located on both sides of the bridge centerline. Multiple counterweight modules 300 are evenly distributed on the cast-in-place beam segment 100, and each counterweight module 300 is provided with a limiting cavity 310 for placing water bags. As the distance between the cantilever beam segment 200 and the bridge centerline is continuously widened during casting, the bridge center of gravity is precisely adjusted by the position and weight of the water bags.

[0035] During the use of the bridge center of gravity adjustment structure of this application, multiple counterweight modules 300 can be arranged on the cast beam segment 100 on one side of the bridge centerline. Water bags can be placed in the limiting cavity 310 of the counterweight module 300. During the casting process, the cantilever beam segment 200 on the other side of the bridge centerline is continuously widened to facilitate adjustment based on the actual position and weight of the water bags. By adjusting the water injection volume and the position of the water bags, the pre-pressure of the bridge deck can be adjusted to adapt to different load conditions and temperature changes. The pre-pressure water bags can apply pressure to make the bridge deck bear the force evenly, avoiding excessive local stress that could cause the bridge deck to crack or be damaged, thus achieving precise adjustment of the bridge center of gravity.

[0036] In this specific implementation, such as Figure 3 As shown, the counterweight module 300 is a rectangular frame-shaped modular structure, which includes two distribution beams 320 in the width direction and two distribution beams 330 in the length direction. The distribution beams 320 and 330 are welded together end to end. The counterweight module 300 is designed with a modular structure and can be prefabricated in advance. After prefabrication, the counterweight module 300 is hoisted onto the cast beam section 100 for installation. The operation is convenient and the installation strength is high. The rectangular frame-shaped confinement cavity 310 can prevent the water bag from slipping and improve safety.

[0037] In this specific embodiment, the rectangular center of gravity of each counterweight module 300 is set at the same distance from the center line of the bridge, so as to ensure that the installation position of the counterweight module 300 meets the design requirements.

[0038] In this specific embodiment, the bottom ends of distribution beam 320 and distribution beam 330 are welded to the bridge deck, and the side walls of distribution beam 320 and distribution beam 330 are reinforced and welded to the bridge deck via multiple stiffening plates 340; for example Figure 4As shown, the stiffening plate 340 is a right-angled trapezoidal steel plate, and the bottom end of the stiffening plate 340 is provided with a right-angled notch 341 for avoiding welding of the first distribution beam 320 or the second distribution beam 330; the first distribution beam 320 and the second distribution beam 330 are I-beams, with the ratio of the web height to the bridge main beam height being 1:3, the flange width not less than 300mm, and the surface coated with an anti-corrosion coating; the welding strength between the first distribution beam 320, the second distribution beam 330, the stiffening plate 340 and the bridge deck all meet the shear strength requirements of Q235B steel; when the counterweight module 300 is assembled using the first distribution beam 320, the second distribution beam 330 and the stiffening plate 340, the operation is convenient and the design strength requirements can be achieved. In addition, the modularly assembled counterweight module 300 can shorten the construction period.

[0039] In this specific embodiment, the bridge center of gravity adjustment structure is applicable to prestressed concrete bridges with spans from 30m to 100m, and has a wide range of applications.

[0040] In this specific embodiment, the bottom of the limiting cavity 310 is provided with a drain hole for quickly draining the water in the water bag, so that the water in the water bag can be quickly discharged after construction is completed.

[0041] In this specific embodiment, the bridge center of gravity adjustment structure of this application also includes a monitoring system for real-time monitoring of the bridge's center of gravity position and feedback adjustment of the water bag counterweight. An inclination sensor installed on the cantilever beam segment 200 can measure the bridge's tilt angle changes in real time with a data accuracy of ±0.01°. Strain sensors deployed on the main beam at the bridge's centerline and the distribution beam of the counterweight module 300 monitor structural strain and determine whether the load distribution is balanced. A weight sensor integrated into the bottom of the limiting cavity 310 of the counterweight module 300 monitors the weight changes of the water bag in real time. This application collects data through the inclination sensor, strain sensor, and weight sensor, and feeds the collected data back to the center of gravity calculation module of the control system. For example, using the bridge centerline as a reference, when the cantilever beam segment 200 is widened, causing an increase in load on that side, the inclination sensor shows a counter-clockwise deflection of one angle, while the weight sensor shows that the right-side water bag is underweight, thus allowing for replenishment of the water in the water bag to compensate for the increased load.

[0042] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A bridge gravity center adjusting structure, comprising a casted beam segment part (100) arranged on both sides of a bridge center line, and a cantilevered to-be-casted beam segment part (200), characterized in that, Multiple counterweight modules (300) are evenly distributed on the cast beam segment (100), and each counterweight module (300) is provided with a limiting cavity (310) for placing a water bag; As the distance between the cantilevered beam segment (200) to be poured and the bridge centerline is continuously widened during pouring, the position and weight of the water bag are used to precisely adjust the bridge's center of gravity.

2. The bridge center of gravity adjustment structure according to claim 1, characterized in that, The counterweight module (300) is a rectangular frame-shaped modular structure, which includes two distribution beams (320) in the width direction and two distribution beams (330) in the length direction. The distribution beams (320) and the distribution beams (330) are welded together end to end.

3. A bridge center of gravity adjustment structure according to claim 2, characterized in that, The rectangular center of gravity of each of the aforementioned counterweight modules (300) is set at the same distance from the center line of the bridge.

4. A bridge center of gravity adjustment structure according to claim 2, characterized in that, The bottom surfaces of the first distribution beam (320) and the second distribution beam (330) are welded to the bridge deck, and the side walls of the first distribution beam (320) and the second distribution beam (330) are reinforced and welded to the bridge deck through multiple stiffening plates (340).

5. A bridge center of gravity adjustment structure according to claim 4, characterized in that, The stiffening plate (340) is a right-angled trapezoidal steel plate, and the bottom end of the stiffening plate (340) is provided with a right-angled notch (341) for avoiding welding of the first distribution beam (320) or the second distribution beam (330).

6. A bridge center of gravity adjustment structure according to claim 5, characterized in that, The first distribution beam (320) and the second distribution beam (330) are I-shaped beams with a web height to main beam height ratio of 1:3, flange width of not less than 300mm, and surface coated with anti-corrosion coating.

7. A bridge center of gravity adjustment structure according to claim 6, characterized in that, The welding strength between the first distribution beam (320), the second distribution beam (330), the stiffening plate (340), and the bridge deck all meet the shear strength requirements of Q235B steel.

8. A bridge center of gravity adjustment structure according to claim 1, characterized in that, The bridge center of gravity adjustment structure is applicable to prestressed concrete bridges with spans from 30m to 100m.

9. A bridge center of gravity adjustment structure according to claim 1, characterized in that, The bottom of the limiting cavity (310) is provided with a drain hole for quickly draining the water in the water bag.

10. A bridge center of gravity adjustment structure according to claim 1, characterized in that, It also includes a monitoring system for real-time monitoring of the bridge's center of gravity and feedback for adjusting the water bag counterweight.

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