Loading device for static load test of pedestrian overpass

Abstract

The utility model discloses a pedestrian overpass static load test loading device, which comprises bearing plates, a load assembly and a grounding loading assembly, the load assembly is arranged above the bearing plates, the grounding loading assembly is arranged below the bearing plates, the height of the grounding loading assembly is adjustable, the two side edges of each bearing plate are respectively provided with a gradienter, and the gradienters are respectively connected with the load assembly and the grounding loading assembly. The two side edges are parallel to the direction of the pedestrian overpass, and when the readings of all the gradienters are the same, all the bearing plates are located on the same horizontal plane; the load assembly comprises supporting steel columns and canvas water bags, the multiple bearing plates and the multiple supporting steel columns are jointly spliced into a three-dimensional frame structure, the canvas water bags are arranged on the bearing plates, and the supporting steel columns lock and fix the canvas water bags through buckles; or the load assembly comprises a concrete test block, and the concrete test block is arranged on the bearing plate. The device is simple in structure and convenient to operate, the test efficiency can be improved, the influence caused by uneven stress can be effectively eliminated for a bridge with a large longitudinal slope or cross slope, and the test error is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge detection, and in particular relates to a static load test loading device for a pedestrian overpass. Background Art

[0002] Static load tests for pedestrian bridges typically involve heavy object loading, including hoisting concrete test blocks, loading with water tanks, and stacking sandbags. Hoisting concrete test blocks is often significantly affected by attached structures, making the operation difficult and time-consuming. Loading with water tanks and sandbags is labor-intensive and difficult to maneuver. Furthermore, none of these loading methods can eliminate the effects of uneven loads on bridges with significant longitudinal or transverse slopes, leading to errors in test results.

[0003] At present, domestic scholars have studied a variety of water tanks for loading pedestrian bridges. For example, the utility model with authorization number CN213233645U discloses a recyclable water tank for loading static loads on overpasses, which is made of green and environmentally friendly materials. The utility model with authorization number CN211927301U discloses an assembled water tank for loading bridge load tests, which can be prefabricated, assembled, and extended. The utility model with authorization number CN217059720U discloses a water tank for loading load tests. The canvas is unfolded in the frame and then filled with water. The test designer can more flexibly choose the loading area and loading water depth according to the loading efficiency.

[0004] The above utility models can be reused and save costs, but they do not solve the problem of loading errors when the longitudinal slope is large. Utility Model Content

[0005] In response to the deficiencies of the prior art, the utility model provides a static load test loading device for a pedestrian overpass. This device is easy to operate, improves test efficiency, and can effectively eliminate the impact of uneven force on bridges with large longitudinal slopes, thereby reducing test errors.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a pedestrian bridge static load test loading device, comprising a bearing plate, a load assembly and a ground loading assembly, wherein the load assembly is arranged above the bearing plate, the ground loading assembly is arranged below the bearing plate, the height of the ground loading assembly is adjustable, and a level is respectively installed on both sides of each bearing plate, wherein the two sides are parallel to the direction of the pedestrian bridge, and when the readings of all the level instruments are the same, all the bearing plates are on the same horizontal plane;

[0007] The load assembly includes a supporting steel column and a canvas water bag. A plurality of load-bearing plates and a plurality of supporting steel columns are assembled together to form a three-dimensional frame structure. The canvas water bag is arranged on the load-bearing plate, and the supporting steel column locks and fixes the canvas water bag through a buckle.

[0008] Alternatively, the load assembly includes a concrete test block, and the concrete test block is arranged on the bearing plate.

[0009] Preferably, the ground loading assembly includes a telescopic leg support rod, a universal bearing and a ground loading plate. The height of the telescopic leg support rod is adjustable. The upper end of the telescopic leg support rod is connected to the load-bearing plate. The bottom end of the telescopic leg support rod is connected to the ground loading plate through a universal bearing. The ground loading plate is arranged on the bridge deck.

[0010] Preferably, the foot support telescopic rod includes a threaded barrel and an adjusting screw, one end of the threaded barrel is connected to the load-bearing plate, and the other end is connected to one end of the adjusting screw, and the other end of the adjusting screw is connected to the ground loading plate through a universal bearing.

[0011] Preferably, the foot support telescopic rod includes a rod body and a rod sleeve, one end of the rod body is connected to the load-bearing plate, the other end of the rod body is sleeved on one end of the rod sleeve, the other end of the rod body is locked and fixed with the rod sleeve through a telescopic rod knob, and the other end of the rod sleeve is connected to the ground loading plate through a universal bearing.

[0012] Preferably, both ends of the load-bearing plate have extensions, the extensions are provided with at least two through holes, the upper ends of the telescopic foot support rods pass through the through holes, and the upper ends of the telescopic foot support rods are provided with locking bolts.

[0013] Preferably, the through hole is provided with a matching steel shaft component. When multiple load-bearing plates are accommodated, one end of the steel shaft component passes through the through hole corresponding to each load-bearing plate, and one end of the steel shaft component is fixed by a fixing nut; the bottom end of the steel shaft component is connected to a movable roller.

[0014] Preferably, the load-bearing plate is made of a low-density and high-strength material.

[0015] Preferably, the canvas water bag is made of waterproof material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention provides a loading device for a pedestrian bridge static load test. The device uses a bearing plate, a load assembly, and a ground loading assembly to perform a pedestrian bridge static load test. The device has a simple structure, is easy to operate, improves detection efficiency, and significantly reduces labor costs. By using a ground loading assembly with adjustable height, the device can effectively eliminate the effects of uneven force on bridges with large longitudinal or transverse slopes, thereby reducing errors in test results. Compared with the prior art, the present invention solves the problem of loading errors when the longitudinal slope is large.

[0018] (2) The load assembly of the present invention uses a concrete test block or a water-filled canvas water bag. The material is easy to obtain, the load-bearing plate is simple to make, and the cost is low. The present invention is easy to disassemble and store, and has the advantages of being less affected by the environment, light weight, adjustable loading angle, easy storage, and reusable. It has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a static load test loading device for a pedestrian bridge when the supporting steel column is in use.

[0020] Figure 2 The utility model is a schematic structural diagram of a grounding loading component of a static load test loading device for a pedestrian bridge.

[0021] Figure 3 The utility model is a structural schematic diagram of a load-bearing plate of a static load test loading device for a pedestrian overpass.

[0022] Figure 4 This is a schematic diagram of the stowed state of the load-bearing plate of a static load test loading device for a pedestrian overpass according to the present invention.

[0023] Among them, 1 is the load-bearing plate, 101 is the through hole, 102 is the steel shaft component, 103 is the fixing nut, 104 is the moving roller, 2 is the supporting steel column, 3 is the buckle, 4 is the level, 5 is the telescopic rod of the foot support, 6 is the telescopic rod knob, 7 is the universal bearing, and 8 is the ground loading plate. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] Example 1

[0026] like Figure 1 The figure shows a schematic diagram of the structure of a loading device for a static load test of a pedestrian bridge, comprising a bearing plate, a load assembly, and a ground loading assembly. The load assembly is located above the bearing plate, and the ground loading assembly is located below the bearing plate. The height of the ground loading assembly is adjustable. A level is installed on both sides of each bearing plate, and the two sides are parallel to the direction of the pedestrian bridge. When the readings of all the level instruments are the same, all the bearing plates are on the same horizontal plane.

[0027] The load assembly includes a supporting steel column and a canvas water bag. A plurality of load-bearing plates and a plurality of supporting steel columns are assembled together to form a three-dimensional frame structure. The canvas water bag is arranged on the load-bearing plate, and the supporting steel column locks and fixes the canvas water bag through a buckle.

[0028] Specifically, in this embodiment, the load-bearing plate and supporting steel column are used to support the canvas water bag. The buckles on the supporting steel column are used to securely connect the canvas water bag, preventing it from moving and facilitating its removal. The canvas water bag is made of waterproof material, and the water weight and quantity of the canvas water bag can be configured in advance according to loading requirements, providing high flexibility.

[0029] Before the pedestrian bridge load test is officially loaded, several ground loading components are placed in the planned loading area according to the slope of the bridge deck. For bridges with large longitudinal slopes that cannot be ignored, by using height-adjustable ground loading components, it is ensured that the bearing plates are on the same horizontal plane (observed by a spirit level) while the ground loading components are in direct contact with the bridge deck, ensuring that the actual force direction of the pedestrian bridge is consistent with the expected direction. The distance between each ground loading plate is close, which is equivalent to uniform loading. The water load is applied to the bridge in the form of local uniform force, which can effectively eliminate the impact of uneven force and reduce the error caused by the test results.

[0030] The ground loading assembly includes a telescopic leg support rod, a universal bearing and a ground loading plate. The height of the telescopic leg support rod is adjustable. The upper end of the telescopic leg support rod is connected to the load-bearing plate. The bottom end of the telescopic leg support rod is connected to the ground loading plate through a universal bearing. The ground loading plate is arranged on the bridge deck.

[0031] Specifically, such as Figure 2 As shown, by adjusting the universal bearing, the ground loading plate is aligned with the pedestrian bridge deck. The telescopic foot support rod is then extended vertically upward, with the upper end passing through the through hole and fixed to the load-bearing plate. By adjusting the height of the telescopic foot support rod and observing the level readings, when the readings on each level are the same, indicating that the load-bearing plate is level, the universal bearing is fixed. This simple structure and convenient operation greatly improve work efficiency and ensure test results when conducting static load tests on pedestrian bridges with large longitudinal or transverse slopes.

[0032] The foot support telescopic rod includes a threaded barrel and an adjusting screw. One end of the threaded barrel is connected to the load-bearing plate, and the other end is connected to one end of the adjusting screw. The other end of the adjusting screw is connected to the ground loading plate through a universal bearing.

[0033] Alternatively, the foot support telescopic rod includes a rod body and a rod sleeve, one end of the rod body is connected to the load-bearing plate, the other end of the rod body is sleeved on one end of the rod sleeve, the other end of the rod body is locked and fixed with the rod sleeve through a telescopic rod knob, and the other end of the rod sleeve is connected to the ground loading plate through a universal bearing.

[0034] Specifically, in this embodiment, the telescopic foot support rod can have two structural forms. No matter the telescopic foot support rod includes a rod body and a rod sleeve, which are fixed by means of a telescopic rod knob, or the telescopic foot support rod includes a threaded tube and an adjusting screw, which are fixed by means of a threaded connection, both facilitate the flexible manual height adjustment of the telescopic foot support rod when the upper and lower ends of the telescopic foot support rod are fixed.

[0035] The two ends of the load-bearing plate have extension parts, and the extension parts have at least two through holes. When the load-bearing plate and the foot support telescopic plate are assembled before the loading test, the upper end of the foot support telescopic rod passes through the through hole, and the upper end of the foot support telescopic rod is provided with a locking bolt.

[0036] Specifically, such as Figure 3 As shown, in this embodiment, the extensions on the left and right ends of the base plate can be configured in a Z-shape, an inverted Z-shape, or an L-shape, an inverted L-shape, respectively. This structure allows the base plates to be aligned when two bearing plates are assembled horizontally, further strengthening the connection. In this embodiment, the number of through-holes is two. When multiple bearing plates are required, each two bearing plates are connected end to end, with the through-holes aligned. The upper ends of the telescopic foot support rods are then passed through both through-holes simultaneously. Finally, the two corresponding bearing plates and the telescopic foot support rods are securely connected using locking bolts.

[0037] The through hole is provided with a matching steel shaft component. When multiple load-bearing plates are accommodated, one end of the steel shaft component passes through the through hole corresponding to each load-bearing plate, and one end of the steel shaft component is fixed by a fixing nut; the bottom end of the steel shaft component is connected to a movable roller.

[0038] Specifically, such as Figure 4 As shown, in this embodiment, the steel shaft component facilitates the storage of the load-bearing plate, and the rollers are used to move the support plate before loading or after storage, which is more convenient.

[0039] The load-bearing plate is made of a low-density, high-strength material. Specifically, in this embodiment, the load-bearing plate can be made of steel. This configuration reduces assembly and disassembly weight, saves effort, and ensures sufficient support for the load assembly.

[0040] Example 2

[0041] The difference between Example 2 and Example 1 lies in the different composition of the load assembly. In this example, the load assembly includes a concrete test block, which is mounted on a load-bearing plate. Specifically, the pedestrian bridge static load test device of the present invention can also be loaded with a concrete test block without installing supporting steel columns and water bags, depending on the actual site conditions.

[0042] The above specific implementation methods are preferred embodiments of the present invention and cannot limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the scope of protection of the present invention.

Claims

1. A static load test loading device for a pedestrian bridge, characterized in that: It includes a load-bearing plate, a load assembly and a ground loading assembly. The load assembly is arranged above the load-bearing plate, and the ground loading assembly is arranged below the load-bearing plate. The height of the ground loading assembly is adjustable. A level is installed on both sides of each load-bearing plate. The two sides are parallel to the direction of the pedestrian bridge. When the readings of all the level instruments are the same, all the load-bearing plates are on the same horizontal plane. The load assembly includes a supporting steel column and a canvas water bag. A plurality of load-bearing plates and a plurality of supporting steel columns are assembled together to form a three-dimensional frame structure. The canvas water bag is arranged on the load-bearing plate, and the supporting steel column locks and fixes the canvas water bag through a buckle. Alternatively, the load assembly includes a concrete test block, and the concrete test block is arranged on the bearing plate.

2. A pedestrian bridge static load test loading device according to claim 1, characterized in that: The ground loading assembly includes a telescopic leg support rod, a universal bearing and a ground loading plate. The height of the telescopic leg support rod is adjustable. The upper end of the telescopic leg support rod is connected to the load-bearing plate. The bottom end of the telescopic leg support rod is connected to the ground loading plate through a universal bearing. The ground loading plate is arranged on the bridge deck.

3. A pedestrian bridge static load test loading device according to claim 2, characterized in that: The foot support telescopic rod includes a threaded barrel and an adjusting screw. One end of the threaded barrel is connected to the load-bearing plate, and the other end is connected to one end of the adjusting screw. The other end of the adjusting screw is connected to the ground loading plate through a universal bearing.

4. The static load test loading device for a pedestrian bridge according to claim 2, characterized in that: The foot support telescopic rod includes a rod body and a rod sleeve, one end of the rod body is connected to the load-bearing plate, the other end of the rod body is sleeved on one end of the rod sleeve, the other end of the rod body is locked and fixed with the rod sleeve through a telescopic rod knob, and the other end of the rod sleeve is connected to the ground loading plate through a universal bearing.

5. The static load test loading device for a pedestrian bridge according to claim 2, characterized in that: Both ends of the load-bearing plate have extension parts, and the extension parts are provided with at least two through holes. The upper end of the foot support telescopic rod passes through the through holes, and the upper end of the foot support telescopic rod is provided with a locking bolt.

6. The static load test loading device for a pedestrian bridge according to claim 5, characterized in that: The through hole is provided with a matching steel shaft component. When multiple load-bearing plates are accommodated, one end of the steel shaft component passes through the through hole corresponding to each load-bearing plate, and one end of the steel shaft component is fixed by a fixing nut; the bottom end of the steel shaft component is connected to a movable roller.

7. The static load test loading device for a pedestrian bridge according to claim 1, characterized in that: The load-bearing plate is made of a low-density and high-strength material.

8. The static load test loading device for a pedestrian bridge according to claim 1, characterized in that: The canvas water bag is made of waterproof material.

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